Lasers, Optics, Photonics & Sensors 2020
(CPD Credits)

International Conference on Lasers, Optics, Photonics & Sensors
in Association with Canadian Academy of Sciences of the Canadian Education Agency Inc. (CAS)

PRELIMINARY PROGRAM

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Nov 13, 2020 SCHEDULE

Conference Hall : CITRUS A
Coffee Break & Networking : MAGNOLIA HALWY
Lunch & Networking : "CITRUS AB"
08:00

BREAKFAST: 06:30 AM TO 10:00 AM (FOR PACKAGES ONLY)
REGISTRATIONS & CONFERENCE KIT ISSUANCE

08:00 - 09:00

09:00

INAUGURATION CEREMONY & MODERATOR GREETINGS

09:00 - 09:15

09:00

EXHIBITORS, SPONSORS, SUPPORTING PARTNERS REPRESENTATIONS

09:00 - 18:15

CONFERENCE SOUVENIR LAUNCH BY KEYNOTE SPEAKERS

09:00

Tiltle: Micro Packaging of Dual in Line Laser Diode Module for Space Applications
Alex Kazemi,  ARK International LLC, USA

Abstract

There are numerous types of semiconductor laser module package design, with coaxial and box types being the most common styles. For high performance laser-based transmitters in the laser firing unit (LFU) for ordinance ignition of a missile system, a quantum well (QW) quasi-continuous wave (QCW) mini-DIL (dual in line) laser module package is used for space application.  One key factor for this choice is that the package includes a thermoelectric cooler to keep the laser at a constant temperature to maintain good reliability. In addition the mechanical components such as metal platform, ferrule, and chip are used to facilitate fiber handing and retention within the package. A dual in line or DIP consists of a laser diode, a submount, a plate, a thermoelectric cooler, a substrate, a U-channel or a Saddle shaped clip (in our package no U-channel or saddle was used), and single mode fiber secured in the ferrule, see Figure 1. To minimize the stresses and strains within the assembled package, fiber-ferrule and submount the same material such as Invar, Kovar or other alloy with low coefficient of thermal expansion (CTE) and thermal conductivity is used.

In this type of laser modules the connected components have different physical and material properties such as different CTE, thermal conductivities and Poisson’s ratios and yield strength.  As a consequence during solidification of the solder in pigtail and solder assembly, the optoelectronic components may experience relative post-solder-shifts in the solidification process initially because of a distribution of the residual stresses that are induced on the solder joints. The fluctuation of thermal stress due to temperature cycles may introduce some plastic yielding locally and redistribution of the residual stresses in solder joints.

An alignment shift of the fiber in the DIP package may be accumulated from successive temperature cycles and even a few micrometers of fiber alignment shift induced by the temperature cycling can incur, leading up to a 50% loss in coupled power and degrade the performance of the packaged lasers, especially in a typical single-mode fiber application. Therefore, approaches to minimize the fiber alignment shift in the temperature cycling test is one of the key research topics in the study of yield and reliability in laser module packaging applications. It is a very difficult task to find the proper reference system to measure the fiber alignment shift in DIP packages since there are many optoelectronic components to identify the specific component responsible for the fiber alignment shift under temperature cycling test. Also the magnitude of the fiber alignment shift is quite small, usually in the micron range.

This paper demonstrates the successful result of a new micro packaging technique for the optimum approach for the mini-DIL for space application. 

About the Keynote Speaker 

 Dr. Alex Kazemi a world recognized Micro Technologist and materials scientist is focusing on development of fiber optics, miniaturized interconnects, fiber optic sensors, and micro packaging of laser components for aerospace applications. He is Boeing Associate Technical Fellow and has worked for Boeing for 22 years. He is regarded as the leading expert in above areas by industry and academia, including US and European aerospace agencies. He has authored/edited 8 books and one text book chapter in the area of Photonics, Lasers, Sensors, Fiber Optics, Micro and Nano Technologies, plus published over 45 papers in International Journals and hundreds of presentations throughout of conferences and technical communities. His research publications have received 900 Read Milestone. He has received great many industrial awards, recognitions and patents.Dr. Alex Kazemi a world recognized Micro Technologist and materials scientist is focusing on development of fiber optics, miniaturized interconnects, fiber optic sensors, and micro packaging of laser components for aerospace applications. He is Boeing Associate Technical Fellow and has worked for Boeing for 22 years. He is regarded as the leading expert in above areas by industry and academia, including US and European aerospace agencies. He has authored/edited 8 books and one text book chapter in the area of Photonics, Lasers, Sensors, Fiber Optics, Micro and Nano Technologies, plus published over 45 papers in International Journals and hundreds of presentations throughout of conferences and technical communities. His research publications have received 900 Read Milestone. He has received great many industrial awards, recognitions and patents.

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09:00 - 09:30

09:30

PROF. ROBERT ALFANO, The City College of New York, USA

Discovery of Ultimate  Supercontinum light  50 years ago

Light is one of the most important and versatile phenomena in nature with  many salient properties . Like a courier, it can transfer information from one point to another, like an alchemist, it can alter matter by initiating and moderating key processes in chemistry, biology and condensed matter.  Light properties  possess color , fastest speed , coherence , polarization and wave fronts . The Short pulses of light allow expose the riot of activity hidden in molecular world of materials . A major discovery occur in 1970 , made by  Robert Alfano  and Stanley L. Shapiro  members of GTE Labs (now Verizon) together when they made a startling  observation of  a new kind of laser light that spanned a large part of the visible spectrum  blue to red over 10,000 cm-1 under excitation of picosecond pulses at 532 nm green color  . This light now is called Supercontinuum (SC), It was published in three seminal paper in same volume of Phys Rev Letters: PRL 24, 584, 592, and 1217, (1970).

Today researchers produce SC light that spans an entire octave or more using optical fibers from uv to NIR. SC is key to frequency comb , probing primary events in chemical and biological processes . The visible spectrum is approximately an octave, and thus the SC realizes the dream of white laser light source. The basic technique that Alfano and Shapiro used to produce the SC involved sending very high intensity picosecond pulses of green laser light through crystals and glasses. The mechanism to explain the observed white light was self-phase modulation. Now SC is generated in optical fibers for compact sources in Visible, NIR and IR  and into X ray in gases. The SC is now 50 years old and still finding new application with Structure light and entering the medical field
 

About the Keynote Speaker

Robert Alfano is an Italian-American experimental physicist. He is a Distinguished Professor of Science and Engineering at the City College and Graduate School of New York of the City University of New York, where he is also the founding Director of the Institute for Ultrafast Spectroscopy and Lasers (1982). He is a pioneer in the fields of Biomedical Imaging and Spectroscopy, Ultrafast lasers and optics, tunable lasers, semiconductor materials and devices, optical materials, biophysics, nonlinear optics and photonics; he has also worked extensively in nanotechnology and coherent backscattering. His discovery of the white-light supercontinuum laser is at the root of optical coherence tomography, which is breaking barriers in ophthalmology, cardiology, and oral cancer detection (see "Better resolution with multibeam OCT," page 28) among other applications. He initiated the field known now as Optical Biopsy He recently calculated he has brought in $62 million worth of funding to CUNY during his career, averaging $1.7 million per year. He states that he has accomplished this feat by "hitting the pavement"; he developed a habit of aggressively reaching out to funding partners and getting them interested in his work. Alfano has made discoveries that have furthered biomedical optics, in addition to fields such as optical communications, solid-state physics, and metrology. Alfano has an outstanding track record for achievements regarding the development of biomedical instruments. His contributions to photonics are documented in more than 700 research articles, 102 patents, several edited volumes and conference proceedings, and well over 10,000 citations. He holds 45 patents and published over 230 articles in the biomedical optics area alone. His discovery of the white-light supercontinuum laser is at the root of optical coherence tomography, which is breaking barriers in ophthalmology, cardiology, and oral cancer detection (see "Better resolution with multibeam OCT," page 28) among other applications. Alfano has trained and mentored over 52 PhD candidates and 50 post-doctoral students. For the past ten years, he has trained innumerable high school students in hands on photonics.


Areas of Expertise/Research Interests
Bonding of Tissues with Light Biomedical Optics and Detection of Cancer with Light Spectroscopy Expertise in Properties of Light and Photonics Ultrafast Spectroscopy and Lasers Physics and Electrical Engineering Science and Engineering

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09:30 - 10:00

10:00

Title: Compact Optical Frequency Comb Sources – Techniques and Applications

Peter J. Delfyett, Pegasus Professor, Trustee Chair Professor of Optics, EE & Physics, Director,
Townes Laser Institute, CREOL, University of Central Florida, USA

The development of high speed communication, interconnects and signal processing are critical for an information based economy.  Lightwave technologies offer the promise of high bandwidth connectivity from component development that is manufacturable, cost effective, and electrically efficient.  The concept of optical frequency/wavelength division multiplexing, i.e., using many different laser colors for transmitting information, has revolutionized methods of optical communication; however the development of optical systems using 100’s of wavelengths present challenges for network planners.  The development of compact, efficient optical sources capable of generating a multiplicity of optical frequencies/wavelength channels from a single device could potentially simplify the operation and management of high capacity optical interconnects and links.   Over the years, we have been developing “mode-locked” semiconductor lasers to emit ultrashort optical pulses at high pulse repetition frequencies for a wide variety of applications, but geared toward optical communication using time division multiplexed optical links.  The periodic nature of optical pulse generation from mode-locked semiconductor diode lasers also make these devices ideal candidates for the generation of a multiplicity of high quality optical wavelengths, or “optical frequency combs”, in addition to the temporally stable, high peak intensity optical pulses that one is accustomed to.  These optical frequency combs enable a variety of optical communication and signal processing applications that can exploit the large bandwidth and speed that ultrafast optical pulse generation implies, however the aggregate speed and bandwidth can be achieved by spectrally channelizing the bandwidth, and utilize lower speed electronics for control of the individual spectral components of the mode-locked laser.  This presentation will highlight our recent results in the generation of stabilized frequency combs, using semiconductor lasers and micro-ring resonators, and in developing approaches for filtering, modulating and detecting individual comb components.  We then show how these technologies can be applied in signal processing applications such as arbitrary waveform generation, arbitrary waveform measurement, laser radar and matched filtering for pattern recognition.  


About the Keynote Speaker

Peter Delfyett is University Trustee Chair Professor of Optics, EE and Physics, and Director, Townes Laser Institute in CREOL, The College of Optics and Photonics, at University of Central Florida.  After obtaining his Ph.D., he joined Bell Communication Research as Member, Technical Staff.  Dr. Delfyett joined the faculty at UCF, CREOL in 1993.  His technical expertise is in the area of ultrafast photonics, in the generation, transmission, detection and application of ultrafast optical pulse trains for applications in communications, signal processing, manufacturing and imaging.   He is a Fellow of APS, IEEE, OSA, NAI, NSBP and SPIE  He has served on the OSA Board of Directors, Board of IEEE-Photonics Society, President of NSBP and Chair of APS Division of Laser Science.  He received the APS Bouchet Award, the Townsend Harris Medal, the NSF PECASE Award, and the Florida Academy of Science Medal, with over 750 technical publications and 42 US patents.

 

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10:00 - 10:30

10:30

NETWORKING SESSION & MORNING REFRESHMENTS

10:30 - 10:45

10:45

Title: Will be Updated Soon
Manijeh Razeghi 
Walter P Murphy Professor and Director Centre for Quantum Devices, 
North-western University, USA

About the Keynote Speaker
Manijeh Razeghi is the Walter P. Murphy Professor of Electrical Engineering at Northwestern University and Director of the Center for Quantum Devices, which she founded in 1991 after a successful 10-year career as the Director of Exploratory Materials at Thomson-CSF, France. She is one of the leading scientists in the field of semiconductor science and technology, having pioneered the development and implementation of major modern epitaxial techniques. Her current research interest is in nanoscale optoelectronic quantum devices from deep-UV up to terahertz. At Northwestern University she has commercialized aluminum-free pump lasers, developed type-II superlattices for next generation infrared imagers (an area in which she holds key patents), and currently holds most of the quantum cascade lasers records for high power and tunability. She has authored 18 books, 31 books chapters, and more than 1000 journal publications. She is editor, associate, and board member of many journals, including Nano Science and Nano technology. Her awards include the IBM Europe Science and Technology Prize, the SWE Lifetime Achievement Award, the R.F. Bunshah Award, the IBM faculty award, Jan Czochralski Gold Medal, and many best paper awards. She is a fellow of SWE, SPIE, IEC, OSA, APS, IOP, IEEE, and MRS.

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10:45 - 11:15

11:15

Title: Coherent poly propagation materials with 3-dimensional photonic control over visible light
Michelle R Stem,
Complete Consulting Services, LLC, Senior Materials Researcher, USA

Ground-breaking research has discovered a material that demonstrates three-dimensional control over photons. The newly identified property allowing three-dimensional visible light photonic control is called coherent poly propagation (CPP). This property is exhibited by a special silicate that is a rare form of a gemstone found in nature – opal. Dr. Michelle R. Stem discovered and examined several specimens of this incredible material and its amazing properties. Her research was published in the peer reviewed journal, PLOS ONE, on October 17, 2019 and can be read at https://doi.org/10.1371/journal.pone.0223715.

Apart from the iconic play-of-color that is typical of precious opal, these special silicate specimens exhibit the previously unknown property of CPP. CPP allows three-dimensional photonic control over visible light by causing the silicate specimens to perform a special diffraction of many types of incident visible light (mono and polychromatic photon sources). The CPP diffracted light accurately propagates multiple copies of the shape of an incident light source in visible light. The propagated shapes of incident light are able to be moved manually over the surfaces of the three-dimensional silicate specimens. CPP diffracted shapes visibly glide and rotate over the proximal (top) and/or distal (underside) surfaces of the specimen as the specimens are moved under an incident light. Generally, the CPP property causes a specimen to propagate multiple CPP diffracted shapes of a visible light source. While the CPP diffracted shapes sometimes propagate the colors of the incident light, they also sometimes propagate upconverted and/or downconverted incident light colors within the visible spectrum and as the CPP diffracted shapes are made to glide over the surface of a silicate specimen.

Surprisingly, these special silicates also exert a previously unknown photonic axial rotational symmetry on incident light. Yet, an amorphous material, such as opal, is expected to have too random an internal structure to exert a symmetry property. The symmetry operation may allow photonic computational (yes/no or one/zero) signals based on the orientation of the propagated image, in contrast to current electronic/magnetic methods.

The amazing properties of these materials occur under ambient conditions and without the need of external thermal, electrical and photonic (other than the incident light) input. This special opal material does not utilize or emit radiation or any other toxic or dangerous components. Further, the material is made of highly abundant silica.

Materials with CPP and/or axial symmetry properties have potential applications in many fields, such as security, communications, cryptography, imaging, projections, defense, computers, photonic waveguides, 3-d photonic control, microscopy, fiber optics, photonic wavelength demultiplexing and more:

  • Security, communications, cryptography and imaging (including multiple simultaneous wavelength transmissions (simulpathing) of tamper sensitive data, non-repudiation through selective wavelength masking and water-marking of image transmissions by adding or deleting specific wavelengths).
  • Projections and defense (including the ability to create real-time false ghost projections of high value assets, such as: military planes in-flight, drones, ground-based and other assets).
  • Computers, photonic waveguides and 3-d photonic control (including the simultaneous calculation/verification of critical data in a multi-optical processor environment, corresponding to a photonic version of the multi-electron-based processor systems currently deployed).
  • Microscopy (including enabling real-time simultaneous imaging over multiple wavelengths without the time-delay and computational vulnerability of current image processing).
  • Fiber optics (including photonic demultiplexing, reduction of signal loss by deployment via the creation of multi-cast capable fiber switches and routers to bypass the current electron conversion step and enable rotational shifting of transmitted fiber optic data with wavelength alteration).

Dr. Stem’s research demonstrates that photons can be controlled over three dimensions in silicate materials by altering the chromaticity of incident light and by changing the relative angle of the material to the viewer and the light source. This discovery is important as a big step towards surpassing some of the limitations of the slower and larger electrons that we currently use. The photonic control demonstrated by this material contradicts common assumptions that opal lacks the ability to display significant photonic properties over a macroscopic volume. A primary goal of future research will be to develop refined materials that display improved CPP and axial rotation properties so as to implement 3-d photonic control in devices.
 

This summary is largely derived from: https://www.rdworldonline.com/coherent-poly-propagation-materials-with-3-dimensional-photonic-control-over-visible-light upon author interest

About the Keynote Speaker

Dr. Michelle R. Stem has a Ph.D. in materials science engineering, MBA in management and B.S. in chemistry. Post-doc research and continued work as Senior Materials Researcher at Complete Consulting Services, LLC. Dr. Stem applies interdisciplinary expertise through multiscale analysis, computational modeling and laboratory synthesis to study extremely rare inorganic, complex and semi-conductor (ICS) materials. Dr. Stem researches ICS structural and property variations to discover and ultimately engineer new methods, applications, models, materials and metamaterials with the goal of controlling photonic, phononic, optoelectronic, band gap and other properties. In addition, Dr. Stem's research develops materials that save energy (e.g. power differentials for photonic band gap versus electronic materials) and finds alternatives to using up rare resources.

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11:15 - 11:45

11:45

Title: Will be Updated soon
Kevin Knabe
Director of R&D
Vescent Photonics, USA

11:45 - 12:15

12:15

Title: Will be Updated soon
Paul Westbrook
OFS Optics, USA

12:15 - 12:45

12:45

Questionaries
Session Conclussions
Acknowledgements

12:45 - 13:00

13:00

Lunch & Networking Session @ CITRUS B 

13:00 - 13:45

13:45

Title: Will be Updated soon
Mahmoud Fallahi
Professor of Optical Sciences
The University of Arizona, USA

Mahmoud Fallahi is a professor in the college of optical Sciences at the University of Arizona. He received his Ph.D. degree from the University of Toulouse and LAAS-CNRS, in 1988. He joined the National Research Council of Canada in 1989 and became a member of technical staff as a Research Scientist during 1992-1995. He joined the University of Arizona as an Assistant professor in 1995. His recent research interests are in high power semiconductor lasers, tunable sources, nonlinear frequency generation, photonic integrated circuits, micro/nanofabrication, and hybrid organic-inorganic components for heterogeneous integration. He has over 200 publications in peer-reviewed scientific journals, international conference proceedings and invited talks. He has authored or co-authored several book chapters, patents and invention disclosures. He has served as Conference Chair and Program Committee member in several international conferences in the field of semiconductor lasers and integrated optics. He is also the co-founder of TPhotonics Inc. During August 2014 –Aug. 2017 he has been with the National Science Foundation (NSF) as a Program Director of the photonics program in the ECCS Division of Engineering Directorate, promoting and managing translational research programs in the field of optics and photonics.

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13:45 - 14:30

14:30

Title: Will be Updated soon
Prof. David Grier, New York University, USA

About the Keynote Speaker: 

David Grier. Professor Of Physics; Director of the Center for Soft Matter Research. ... David Grier. Professor Of Physics; Director of the Center for Soft Matter Research david.grier@nyu.edu 726 Broadway, Room 873.

Find more information available at:
https://as.nyu.edu/content/nyu-as/as/faculty/david-grier.html
https://physics.nyu.edu/grierlab/shortcv.pdf

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14:30 - 15:00

15:00

 Title: Will be Updated soon <>Boris Gramatikov
Ophthalmic Instrumentation Development Laboratory, Wilmer Eye Institute
Johns Hopkins University School of Medicine Baltimore, MD, USA

About the Keynote Speaker: 

Boris Gramatikov obtained his Dipl.-Ing. degree in Biomedical Engineering in Germany, and his Ph.D. in Bulgaria. He has completed a number of postdoctoral studies in Germany, Italy and the United States. He joined the faculty of the Biomedical Engineering Department of The Johns Hopkins University in 1996, and has been working in the Laboratory of Ophthalmic Instrumentation Development at The Wilmer Eye Institute since 2000. His areas of expertise include electronics, optoelectronics, computers, computer modeling, signal/image processing, data analysis, instrumentation design, biophotonics, ophthalmic and biomedical optics, polarization optics, all applied to the development of diagnostic methods and devices for ophthalmology and vision research. His team has developed a series of pediatric vision screeners. He has over 120 publications, 41 of which in high-impact peer-reviewed journals. He serves as a reviewer and editorial board member with a number of technical and medical journals.

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15:00 - 15:30

15:30

 Title: Review on the progress of nano-sensors for hydrogen leaks – Nanostructured sensors based on palladium nanoparticle
Nicolas Javahiraly,  
University of Strasbourg/ ICUBE Institute, France

Abstract

Hydrogen seems to be one of the alternative ecological sources of energy related to numerous industries. It is presented as the sustainable energy carrier of the future. Hydrogen may be used to produce, store and transport energy and its possible applications are wide ranging. The industry based on the use of gaseous hydrogen has to meet the safety standards connected to the physical and chemical properties of hydrogen and to its operating conditions (pressure and temperature range). Hydrogen is a flammable and highly explosive gas: the lower flammability point is 4% in air going up to an upper limit of 74.5% and the ignition energy in air is as low as 0.02 mJ. The present hydrogen detectors use electrical sensors that may be subject to short-circuits and produce sparks. In order to eliminate this risk, for example, optical sensors appear as a sensible alternative for hydrogen detection. They exhibit sensitivity and response time equivalent to electrical devices without involving hazardous conducting parts. Moreover, they are intrinsically insensitive to electromagnetic perturbations.  This review is devoted to describing the recent progress in the innovative nano-sensors for hydrogen leak detection exploiting the properties of Palladium nanoparticles or nanostructured designs to bring a real breakthrough into detection performances.  
Keywords: Hydrogen, sensors, review. 

About the Keynote Speaker

Nicolas Javahiraly is an associate professor in physics at the University of Strasbourg. He did his PhD in Photonics at the same university on fiber optic sensors. After a post-doc at Harvard University on the interaction between ultra-short laser pulses and matter, he worked as a project manager and expert in the Sagem Defense group in Paris. He joined the University of Strasbourg in 2007 and is currently working on nano-optical sensors and plasmonics for various applications such as gas detection, pollutants detection and photoconversion systems for example.

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15:30 - 16:00

16:00

Refreshments & Networking Session @ MAGNOLIA HALWY

16:00 - 16:25

16:25

Title: Harmonic Generation Microscopy as Intravital Neuro-imaging
Hyungsik, Hunter College of the City University of New York, USA

Optical harmonic generation, e.g., second- (SHG) and third-harmonic generation (THG), provides intrinsic contrasts for three-dimensional intravital microscopy. Contrary to two-photon excited fluorescence (TPEF), however, they have found relatively specialized applications, such as imaging collagenous and non-specific tissues, respectively. Here we review recent advances that broaden the capacity of SHG and THG for imaging the central nervous system in particular. The fundamental contrast mechanisms are reviewed as they encode novel information including molecular origin, spectroscopy, functional probes, and image analysis, which lay foundations for promising future applications in neuroscience.

About the Speaker

Hyungsik Lim received PhD in Applied and Engineering Physics from Cornell University and did postdoctoral studies on optical coherence tomography (OCT) at Harvard Medical School, Wellman Center for Photomedicine and on multiphoton microscopy (MPM) at Cornell University, in the laboratory of Watt W. Webb. He is currently an associate professor in physics, Hunter College and the City University of New York.

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16:25 - 16:55

16:55

Title: Experimental and computational study of laser filamentation and high-order harmonic generation
BONGGU SHIM
Binghamton University,
State University of New York, USA

Abstract

In this presentation, I will talk about the experimental study of ultrashort laser matter nonlinear interactions such as laser filamentation (self-guidance of a high intensity laser pulse) and high-order harmonic generation (table-top UV and soft x-ray generation) performed at Binghamton University. For all experiments, we use state-of-the-art time-resolved diagnostic techniques such as single-shot frequency domain holography, in-line holography, and time-resolved interferometry to spatio-temporally visualize the optical nonlinearities and thus to understand the underlying dynamics of laser matter interactions. In addition, we perform our own numerical simulations by solving the nonlinear Schrödinger equation to be benchmarked against experiments.

First, I will talk about femtosecond-time-resolved interferometry to directly measure plasma densities and plasma collisional frequencies during laser filamentation in fused silica by varying the pump (driver) wavelength from 1.2 to 2.3 μm. Our results surprisingly show that the plasma density does not decrease as the driver wavelength increases, which is in sharp contrast to the expected trend. I will discuss the wavelength-scaling physics of laser filamentation by comparing with numerical simulations.

Second, I will talk about harmonic generation enhancement in plasma using two-color femtosecond pulses and recent development of experimental and computational high-order harmonic generation research at Binghamton University.

Third, I will talk about state-of-the-art single-shot frequency-domain holography which has been implemented recently at my lab to visualize the optical Kerr effect and plasma generation and decay in a single shot for strong field laser matter interactions.   

About the Speaker

Bonggu Shim has completed his undergraduate education from Seoul National University in South Korea and graduate education from the University of Texas at Austin. His Ph.D. project was experimental harmonic generation from atomic clusters under intense femtosecond laser fields. During his postdoctoral training at Cornell University, he worked on experimental and computational laser filamentation and laser micromachining. He is currently working as an associate professor for Binghamton University, State University of New York (SUNY) and his group at Binghamton focuses on experimental and computational nonlinear optics.

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16:55 - 17:25

Customer-Affordable Handheld Near-Infrared Spectrometers: On-Site Quality Control and Protection against Product Counterfeiting

Abstract 

Recently, miniaturization of Raman, mid-infrared (MIR) and near infrared (NIR) spectro-meters has made substantial progress, and marketing companies predict this segment of instrumentation will have a significant growth rate within the next few years. This increase will launch vibrational spectroscopy into a new era of quality control by in-the-field and on-site analysis.

While the weight of the majority of handheld Raman and MIR spectrometers is still in the    ~1 kg range, the miniaturization of NIR spectrometers has advanced down to the ~100 g level, and developments are under way to integrate them into mobile phones. Thus, based on high-volume manufacturability and significant reduction of costs, numerous companies target primarily with NIR instruments a non-expert user community for consumer applica-tions. Especially from this last-mentioned development, a tremendous potential for everyday life can be expected ranging from food testing to detection of fraud and adulteration in a broad area of materials (pharmaceuticals, textiles, polymers, etc.).

However, contrary to the exaggerated claims of many direct-to-consumer companies that advertise their ‘scanners’ with ‘cloud evaluation of big data’ this presentation will provide an overview on the realistic application potential of these instruments.

About the Speaker 

Heinz Wilhelm Siesler is a Professor of Physical Chemistry at the University of Duisburg-Essen, Germany, with expertise in vibrational spectroscopy in combination with chemometric data evaluation for chemical research, analysis and process control. He has 240+ publications (4 monographs) and presented more than 300 lectures worldwide. Since 2012 he is a Fellow of the Society for Applied Spectroscopy and received several awards (1994 EAS NIR Award, 2000 Tomas Hirschfeld PITTCON NIR Award, and 2003 Buechi NIR Award).

Prior to his academic position he gained industrial experience as section head in molecular spectroscopy and thermal analysis in the R&D Department of Bayer AG, Germany. He also worked as lecturer (University of the Witwatersrand, Johannesburg, South Africa) and Post-Doc (University of Cologne, Germany), after receiving his PhD in Chemistry (University of Vienna, Austria).

The test and application of miniaturized handheld vibrational spectrometers is a special research focus over the last ten years.

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Title: Visualizing Metabolic Activities in Cells and Animals with High Resolution Vibrational Imaging
Lingyan Shi, UCSD bioengineering, United States

Understanding the dynamics and heterogeneity of metabolism in a single cell or a multicellular organism is essential to unraveling the mechanistic basis of many biological processes. It is the synthesis, transformation and degradation (the definition of metabolism) of biomolecules that carry out the genetic blueprint. Traditional imaging methods such as MRI, PET, fluorescence, and mass spectrometry have fundamental limitations, for example, conventional methods can only detect the early stages of glucose metabolism (catabolism), but cannot monitor or visualize the process from glucose anabolism to different macromolecule synthesis in situ.

Being an emerging non-linear vibrational imaging microscopy technique, stimulated Raman scattering (SRS) can generate chemical specific imaging in situ with high resolution, deep penetration, and quantitative capability. In the present work, we developed new methods that combine deuterium (D)-labeled metabolites (such as heavy water, D-glucose, D-fatty acids, and D-amino acids) probing and SRS microscopy to visualize metabolic dynamics in live cells and animals. The incorporation of D-labeled metabolites into new biomolecules would carry the carbon-deuterium (C-D) bonds into macromolecules including proteins, lipids, DNA/RNA, and carbohydrates. Within the broad vibrational spectra of C-D bonds, we discovered macromolecule-specific Raman shifts and developed spectral unmixing methods to obtain C-D signals with macromolecular selectivity. Applying this method, we were able to study the myelination in the postnatal mouse brain, identify tumor boundaries, examine the intra-tumoral metabolic heterogeneity, and differentiate protein/lipid metabolism during aging process. This technology platform is non-invasive, universal applicable, and can be adapted into a broad range of biological studies such as development, aging, homeostasis, tumor progression, and more.

About the Speaker

Dr. Lingyan Shi’s pioneering work in developing and applying novel optical techniques has led to a number of significant breakthroughs in biophotonics with major implications for the fields of neuroscience and cancer research and is allowing us to visualize the mechanisms underlying everyday processes and disease. One of Dr. Shi’s most significant discoveries has been the development of a new experimental technique that combines heavy water labeling and a relatively new imaging method, stimulated Raman scattering microscopy, to probe the metabolic activities of living tissues at subcellular resolution in situ. This discovery facilitates the visualization of tumor boundaries, embryonic development, and even aging in biological tissue. Another significant scientific contribution is her discovery of the “Golden Optical Window” – a unique band of infrared wavelengths that can penetrate deeper into biological tissues than other wavelengths of light during imaging, thereby dramatically increasing the imaging depth possible in brain tissue by as much as 50%. In addition, Dr. Shi has developed an early-detection spectral technique that could provide doctors with a tool for the early-stage detection of Alzheimer’s disease.

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Speaker Slots Available

Questionaries
Session Conclussions 
Acknowledgements   
Day 1 Closing Ceremony 

Nov 14, 2020 SCHEDULE

Conference Hall : CITRUS A
Coffee Break & Networking : MAGNOLIA HALWY
Lunch & Networking : "CITRUS AB"
08:00

BREAKFAST: 06:30 AM TO 10:30 AM (FOR PACKAGES ONLY)
REGISTRATIONS

08:00 - 09:15

09:15

EXHIBITORS, SPONSORS, SUPPORTING PARTNERS REPRESENTATIONS

09:15 - 18:30

09:15

Session Steering Committee

Alex Kazemi,
ARK International, USA    


Syed H. Murshid
Professor of Electrical and Computer Engineering, Florida Tech, USA

09:15 - 17:00

09:15

Title: Will be Updated soon
Martin c. Richardson
Founding Director of the Townes Laser Institute
University Trustee Chair, UCF, USA

About the Keynote Speaker

Martin Richardson graduated from Imperial College, London, in Physics (1964) and gained his Ph.D in Photon Physics from London University in 1967 as the first student to graduate in lasers under the advisement of the late Daniel Bradley. For his thesis he studied the spectral characteristics of laser modes, investigated non-linear optical processes in dense plasmas and developed a new high power dual frequency laser. Although lasers were then still considered ‘a solution looking for a problem’, after the award of the 1964 Nobel Prize to Townes, Prokhorov and Basov for inventing the concept of the laser, many new laser research teams were being created worldwide. Richardson joined one of the first laser groups investigating laser and plasmas in the Division of Gerhardt Herzberg at the National Research Council Laboratories in Ottawa. Mode-locking as a technique for creating ultrashort laser pulses had just been invented, and he was the first to create plasmas in gases by amplified single ultrashort laser pulses. He stayed at NRC until 1979, making contributions to the development of new lasers, including patents on the discharge-pumped CO2 laser that launched the Lumonics corporation, nonlinear optics, mid-IR laser selective dissociation of molecules, the precursor to laser isotope separation, and the development of ultra-fast optical diagnostics. His work on laser-produced plasmas lead to the creation of the first Canadian team focused on laser fusion. Collaborations with the Lebedev Institute resulted in the development of the picosecond streak camera. In 1974 Richardson spent five months in the Soviet Union in the laboratories of Alexandr Prokhorov at the Lebedev Institute. In 1980 he joined the University of Rochester where he worked for nine years as group leader for laser fusion experiments for the then new 24-beam OMEGA laser system at the Laboratory for Laser Energetics. He also held an adjunct faculty in the Institute of Optics. While at Rochester he was also involved in x-ray laser and laser-plasma x-ray spectroscopy investigations. In 1990 he and William Silfvast established the Laser Plasma Laboratory at CREOL, the Center of Research in Electro-Optics & Lasers at UCF, developing research programs in ultrafast laser development, laser-plasma studies, EUV/X-ray lithography and microscopy and laser materials processing. These research activities expanded to include femtosecond laser structuring of materials, laser spectroscopy and sensing and high-intensity laser filamentation studies in the atmosphere. In 2003 he was appointed the Northrop Grumman Professor of X-ray Photonics as part of major $24M donation to UCF. He was made a Trustee Chair of the University in 2006, and appointed as the first and founding director of the Townes Laser Institute in 2007. Professor Richardson has throughout his career taken an intense interest in the education of his students. In Canada he introduced schemes through which students from Canadian universities could study for their Ph.D’s at NRC-Canada. He directs an NSF International REU program, and has initiated an Atlantis program for students to obtain a international MS degree between UCF and the universities of Bordeaux, Jena and Clemson. Some of his students gain co-tutelle Ph.D degrees with the University of Bordeaux. He is particularly interested in advancing science in under-developed countries, and in enabling equal rights for women through science. Professor Richardson has held visiting scientific positions at the Max Born Institute in Berlin, the Institute for Laser Engineering (ILE) Osaka University, the Max Planck Institute for Quantum Optics in Garching, and other institutions in Australia, Canada, France, Qatar and the former Soviet Union. He has published over 400 scientific articles in professional scientific journals, and has presented numerous invited and plenary talks. He holds ~ 20 patents, with several pending and has chaired many international conferences including IQEC, ICHSP, and several SPIE meetings. He is a former Associate Editor of JQE, a recipient of the Schardin Medal, and a Fellow of OSA.

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09:15 - 09:45

09:45

Title: Plasmonic micro sensor for pesticides detection 
Nicolas Javahiraly
University of Strasbourg ICUBE Institute, France

Abstract
Micro pollutants are substances found in trace amounts in water, air and soil. Generally toxic, they can be of all kinds: mineral, organic or biological. We will focus here on a specific class of micro pollutant: pesticides. On March 20, 2015, the World Health Organization’s cancer agency classified five pesticides as "possible" or "probable" human carcinogens. Among these five pesticides is glyphosate, which is the most widely used pesticide in the world.  
Furthermore, the detection of micro pollutants by new innovative systems is one of the important issues of our society. This study is dedicated to innovative pollutant micro sensors exploiting the interaction properties between light and original nanostructured materials, in order to create a real jump in performance in terms of detection limit, quantification and sensitivity. The detection of our pesticide is based on the variation of the optical properties of the materials used in the presence of the molecule to be detected. We propose two ways of investigation that are (i) the Surface Plasmon Resonance detection (SPR) in Kretschmann configuration and (ii) the use of an original functionalized nano-structured organization based on the use of functionalized gold nanoparticles.  
Keywords: Plasmonics, micro pollutant detection, nano structured materials. 

About the Speaker: 

Nicolas Javahiraly is an associate professor in physics at the University of Strasbourg. He did his PhD in Photonics at the same university on fiber optic sensors. After a post-doc at Harvard University on the interaction between ultra-short laser pulses and matter, he worked as a project manager and expert in the Sagem Defense group in Paris. He joined the University of Strasbourg in 2007 and is currently working on nano-optical sensors and plasmonics for various applications such as gas detection, pollutants detection and photoconversion systems for example.

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09:45 - 10:15

10:15

Networking Session, Morning Refreshments @ MAGNOLIA HALWY

10:15 - 10:30

10:30

Title: Will be Updated soon
Syed H. Murshid
Professor of Electrical and Computer Engineering,
Florida Tech, USA

Awards
Named one of Florida's five most influential scientists, Florida Trend magazine, November 2004.
Postdoctoral Fellow, Electrical and Computer Engineering, Florida Institute of Technology, 1997-1998

Patents
International Patent: Murshid Syed and Rumpf Raymond “Fiber Optic Fabry-Perot interferometers and associated methods” European Patent Office June, 2006.
US Patents: Murshid S., and Lovell G., "All-optical spatial domain multiplexing de-multiplexer" United States Patent No. 9,529,147, December 27, 2016.
Murshid S., and Finch M., "Omnidirectional free space optical communications receiver" United States Patent No. 9,515,729, December 6, 2016.
Murshid S., and Khayrattee A., "Orbital angular momentum in spatially multiplexed optical fiber communications" United States Patent No. 8,396,371, March 12, 2013.
Murshid S., “Array of concentric CMOS photodiodes for detection and de-multiplexing of spatially modulated optical channels” United States Patent No. 8,278,728, October 2, 2012
Murshid S., et al “Methods and apparatus for spatial multiplexing in optical communication”. (7,639,909) December 2009.
Murshid S., Grossman B., Narakorn P., “Methods and apparatus for spatial domain multiplexing in optical fiber communications”. (7,174,067). February 06, 2007.
Rumpf R and Murshid Syed, “Fiber Optic Fabry-Perot interferometers and associated methods”. (6,886,365), also awarded International patent on a similar invention. May 03, 2005.
Murshid Syed H., “Fiber optic level detection system.”(6,801,678) October 05, 2004.

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10:30 - 11:00

11:00

Title: low noise random fiber laser
Xiaoyi Bao
Professor, F RSA, F OSA, F SPIE
Canada Research Chair in Fiber Optics and Photonics (Tier I),
University of Ottawa, Canada

 

11:00 - 11:30

11:30

Title: Will be Updated soon
YU, BING, Medical College of Wisconsin, USA

11:30 - 12:00

12:00

Young Investigators Program


Title: Lidar Design for Self Driving Cars
Piracha, AEye Inc., California, USA

Abstract

Self driving cars are one of the hottest applications of lidars nowadays, and are expected to have a major impact on our society and our lifestyles. This talk will review different kinds of lidar implementations, and some of the fundamental design principles, trade-offs and challenges that are involved in building lidars for self driving cars.

Biography

Dr. Mohammad Umar Piracha received his PhD degree from the College of Optics (CREOL) at the University of Central Florida, where he developed a long range Lidar system using a mode locked laser, under the supervision of Prof. Peter Delfyett. He has been involved with several startups, including Luminar Technologies, and IMEC-USA. Dr. Piracha has 32 conference and journal publications, and 3 patents. He serves as a reviewer for NSF's SBIR program, and is currently working as a Staff Lidar Systems Engineer at AEye Inc., California.

 

12:00 - 12:30

12:30

Title: Hyperfine Filtering on a Multiplicity of Frequency Combs
Lawrence Trask, CREOL, The College of Optics and Photonics
University of Central Florida, USA

Abstract
 

Optical frequency combs (OFC) have evolved to become an important tool in various applications to date such as spectroscopy, metrology, and high speed communications. An optical frequency comb is defined as a grid of perfectly spaced comb lines (frep) offset by the carrier-envelope-offset frequency (fceo). Each nth comb line is uniquely defined by the relationship fn =nfrep+fceo. Knowledge and control of both parameters is required for many applications. Determining frep is simple, however, fceo is difficult to obtain. fceo can be obtained and compensated for using f-2f interferometry and a PID loop, but requires a coherent octave.
 

Recently, electro-optic modulated (EOM) combs have been shown to be a simple and robust method for generating OFC. A limiting factor for EOM combs to obtain a well-defined fceo beat signal is the background noise increase due to multiplication of the RF driving signal noise on each line without a filtering mechanism. Optical filtering for an EOM comb has been the only method demonstrated to obtain fceo using f-2f interferometry.
 

We demonstrate optical filtering of an EOM comb by first stabilizing a CW laser to an ultra-high finesse (100k finesse) etalon with a 15 kHz passband. After stabilizing the CW laser, we pass it through two low V phase modulators and one intensity modulator all driven at ~10 GHz. The EOM comb has an optical bandwidth of 440 GHz within a 10 dB deviation and a pulse duration of 2.46 ps. Finally, we use a modified PDH setup to lock a tunable etalon (1k finesse) to the EOM comb. We find that although the tunable etalon filters high frequency noise, the noise close in to the carrier increases due to the finite bandwidth of locking electronics and finite response of piezoelectrics. The increase in noise close to the carrier increases the timing jitter from to 25.68 fs to 54.06 fs (1 Hz – 100 MHz).
  Ongoing research for an alternative method of generating filtered EOM combs is underway in which all comb lines are simultaneously filtered and stabilized to a 100k finesse etalon. We believe this approach may produce lower timing jitter and better stability.

Biography
      
Lawrence Trask received the B.S. degree in electrical engineering from the University of California, San Diego, San Diego, CA, USA, in 2016. He is currently working toward the Ph.D. degree in optics and photonics at CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL, USA.

12:30 - 13:00

13:00

LUNCH BREAK & NETWORKING KIT DISTRIBUTION AND SESSION

13:00 - 13:45

13:45

Title: PAM-4 Data Transmission using Modulation Instability Frequency Combs on a Kerr Microresonator platform
Chinmay Shirpurkar
CREOL, The College of Optics and Photonics
University of Central Florida, USA

Abstract
 

Optical frequency combs have found their applications in many areas over the past decade. One type of comb generation observed in microresonators which relies on the Kerr effect has been of particular interest in many areas of ultrafast optics due to the advantages of having a broad comb bandwidth and low threshold powers for parametric gain. These Kerr optical frequency combs have been used in a wide variety of applications including spectroscopy, frequency metrology, LIDAR, microwave to optical links and optical communication. In this work, we demonstrate an application of optical communication by creating a communications link consisting of a data transmitter and receiver. The optical carrier signals are generated by pumping a microresonator ring and accessing the Kerr optical frequency comb. This comb is obtained by slow tuning through the resonance so it is not a mode-locked soliton comb however it is stable enough to use for communications purposes. The ease of accessing this MI comb state makes this an attractive method for generating carriers to use in communication systems. The individual wavelengths of the frequency comb are then demultiplexed and modulated with a PAM-4 modulation scheme using an electro-optic intensity modulator. We then receive these transmitted signals and make an estimate of the BER of the received data by considering the eye diagrams of the signals.

 The Kerr microresonator used in our experiments has an FSR of 300 GHz and spans a bandwidth of about 35 THz which generates about 120 different optical frequencies. Considering a 2 Gbps PAM-4 data transmission rate (generated by 1Gbps of NRZ signals) on a single channel, it would be possible to transmit over 240 Gbps through this single optical communications link. Higher transmission rates can be achieved by higher RF modulation data rates or more number of channels (achieved by interleaving two separate combs or reducing FSRs). This large bandwidth combined with the stability of these combs make them an extremely attractive platform for transmission of data at high rates with low BERs.


 
Biography
 
Chinmay Shirpurkar has completed his Bachelor of Technology in Electrical Engineering from the Indian Institute of Technology, Gandhinagar and is currently pursuing a PhD. in Optics and Photonics from the College of Optics & Photonics (CREOL) at the University of Central Florida. His research interests include ultrafast photonics, metrology and optical communications.

13:45 - 14:15

14:15

A novel nanocomposite based on 2D nanosheets, Ti3C2 MXene and 1D nanowires, KxWO for application in diabetes care
Danling Wang, North Dakota State University, United States

Abstract

Acetone existing in human breath is an effective biomarker of diabetes, which can be used for the early diagnosis and daily monitoring of diabetes. Comparing to the conventional method for diabetes diagnosis and monitoring that analyzes the blood glucose level in blood, detection of breath acetone is a very need of a method in view of its merits such as non-invasive, accurate, convenient, and inexpensive. Recently, our group has reported a new breath acetone sensor based on a novel nanostructured KxW7O22 (KxWO) which exhibits a very sensitive response to acetone at the room temperature. The lowest concentration of acetone can be detected down to 1.2 ppm with response time of 12 s. However, considering the screening purpose of diabetes, concentration of acetone 0.76 ppm is the key threshold to distinguish health person and highrisk of diabetes person. In order to increase the sensitivity of acetone detection furtherly, a new nanocomposite made by 2-D MXene, Ti3C2 nanosheets and 1D KxWO has been recently synthesized in our group. The initial sensing testing shows excellent acetone response, which can be down to 0.2 ppm. On the other hand, due to good electric conductivity of Ti3C2 nanosheets, the acetone sensor based on Ti3C2-KxWO has stable electric property and exhibits excellent selectivity as well. This study can improve the understanding of the new material and its acetone sensing mechanism, and thus give ideas for further increasing the sensitivity for acetone detection, eventually resulting in an advanced material capable to analyze acetone in the exhaled breath for disease diagnosis and monitoring purpose.

About the Speaker 
Danling Wang is an Assistant Professor of the Department of Electrical and Computer Engineering at North Dakota State University, where she has been since 2016. Dr. Wang graduated from Department of Electrical Engineering in University of Washington, Seattle, in 2014. Since 2008, her research is focused on investigation of portable chemiresistive sensors particularly based on nanostructured materials such as metal-oxide semiconductors in application to explosive detector in industry and military, and breath analyzer for early stage disease diagnosis. The theme of her research is to create high performance sensor devices through exploring the relationships between the composition/structure of materials and their electric, optical and electrochemical properties and studying the interaction between gas molecules and a solid-state film. The main goal of her research is to deliver in-depth fundamental research with regard to sensor materials and devices in application of disease diagnosis, health status monitoring, industrial and food safety

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14:15 - 14:45

14:45

Title: All Optical Tunable Beam Splitter Based on Photonic Crystal Waveguides
Seyedhassan Ehsaniamri, USA

Title: All Optical Tunable Beam Splitter Based on Photonic Crystal Waveguides 

Keywords:
Photonic crystal, Tunable beam splitter, Finite difference time domain, induced Kerr nonlinear effect, elliptical cavity

Abstract: In this work we propose a Y- shaped beam splitter in a two-dimensional photonic crystal structure ,which provides us the ability to control dividing power into two output waveguides by a control optical beam. The optical modeling of this proposed structure was investigated by finite difference time domain (FDTD) simulation. In this scheme, we use the nonlinearity feature of photonic crystal to control the power ratio of the output waveguides. Using the Kerr nonlinearity property and engineering the elliptical cavity’s dimensions or elliptical cavity modes, we can manage the coupling power of the input waveguide to each of the output waveguides. Simulation results show that resonance wavelength shifting occurs in amount of ±15 nm  in elliptical cavity   due to induced kerr nonlinearity as a function of control beam power. 

14:45 - 15:15

15:15

Title: Optically pumped and probed alkali-metal magnetometer for magnetic resonance imaging applications
Igor Savukov, Los Alamos National Laboratory, USA

Progress in laser technology led to the development of non-cryogenic ultra-sensitive magnetic-field sensors. Such sensors are based on an alkali-metal vapor cell and two lasers, one for polarizing atomic spins and the other for reading out their state. Achieving high sensitivity in magnetic measurements needs low intensity fluctuations and frequency noise of the two lasers. Distributed feedback (DFB) lasers, providing a stable single-frequency operation, are almost ideal for this demand. In addition, such lasers can be coupled to fibers to provide flexibility in applications. The fundamental limit of the sensitivity is in the range of 10-17 T, much better than that of most sensitive cryogenic sensors – superconducting quantum interference devices (SQUIDs). The optically pumped and probed magnetometers (OPPMs) find many applications, where traditionally SQUIDs were used, such as magnetoencephalography (MEG). At Los Alamos, we focus on applications of OPPMs in both biomagnetic measurements such as MEG and magnetic resonance imaging detection. We have demonstrated the first detection of NMR and anatomical imaging with OPPMs, also referred to as atomic magnetometers. It is possible to implement a multi-channel parallel MRI using a large Rb vapor cell with broad pump and probe beams. The parallel MRI approach provides significant acceleration of MRI, while a single large cell multi-channel operation reduces dramatically price, at least 10 times to make the approach practical. We will give some overview of OPPM applications in MRI and will show some preliminary results obtained with a multi-channel MRI system.

 

Speaker Biography

PhD in 2002, University of Notre Dame, USA. A postdoc, Princeton University, Romalis group, 2002-2006. R&D Scientist at Los Alamos National Laboratory, since 2010. Published 95 papers (h index 25, 2621 citations) and has been working over 15 years in the field of sensitivity magnetic measurements, laser spectroscopy, experimental and theoretical atomic physics. Selected publications: “Optical detection of liquid-state NMR,” Savukov, et al., Nature 442, 1021 (2006); “NMR detection with an atomic magnetometer,” Savukov and Romalis, Phys. Rev. Lett. 94, 123001 (2005

 

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15:15 - 15:45

15:45

Title: Mamyshev oscillators: the path to robust ultrafast all-fiber lasers
Olivier, M, COPL (Université Laval), Canada

Mamyshev oscillators constitute a new class of ultrafast fiber lasers. They achieve mode locking through the combined effect of nonlinear spectral broadening and the presence of two offset spectral filters in the laser cavity. This concept was introduced a few decades ago and, in 2008, it was suggested to apply it to fiber lasers. Recently, Mamyshev oscillators based on ytterbium- and erbium-doped fibers emitting femtosecond pulses were demonstrated. Their performances surpassed the performances of other types of ultrafast fiber laser oscillators in terms of pulse energy, pulse duration, spectral bandwidth and peak power by a significant margin. They are now considered as potential competitors to the well-established solid-state lasers in many applications. The main advantages of fiber Mamyshev oscillators are their simplicity, their robustness to environmental perturbations and their low cost.

 

Nonetheless, most Mamyshev oscillators presented so far used optical fibers in conjunction with free-space optical components such as waveplates, isolators, diffraction gratings, etc. All-fiber versions of Mamyshev oscillators would make them much more attractive. Indeed, most of the problems observed in solid-state lasers such as the complexity of the cavities, the need for optical re-alignment, the need for a lot of workspace and many others would be avoided. In this talk, we will thus present the progress we have made in designing all-fiber Mamyshev oscillators based on fiber Bragg grating reflectors.

 

The dynamics of Mamyshev oscillators will be presented with some emphasis on critical issues when designing an all-fiber version. The impact of dispersion, nonlinearity, gain bandwidth and polarization evolution will be discussed. More important, the shape of the reflectivity profiles of the spectral filters will be shown to play a crucial role. Designing the appropriate fiber Bragg gratings was thus a difficult task we achieved.

 

Another important issue for the design of practical Mamyshev oscillators is self-starting operation. As the laser is turned on, it should reach the mode-locked state right away. It is well known that these oscillators do not have the tendency to mode lock. When the filters are too far apart, the cavity emits amplified spontaneous emission. When they are too close, the cavity produces CW emission at an intermediate wavelength where the two filters show some overlap. In between, self-starting is sometimes possible but not always easy. In several cases presented in the literature, the oscillator is started by using an external pulsed laser seed. This adds a layer of complexity to the system. Consequently, in an effort to improve the simplicity and the reliability of Mamyshev oscillators, a few mechanisms to perturb the cavity and force the formation of a pulse were introduced over the past few years. This could be done by modulating the pump power or introducing an external nonlinear arm that could initiate Q-switching and eventually mode lock the Mamyshev oscillator. Some of these alternatives will be discussed.

 

We conclude by presenting an all-fiber 1550-nm Mamyshev oscillator based on fiber Bragg gratings that we designed. This erbium-doped fiber laser generates pulses with an energy above 20 nJ, a duration close to 100 fs at a repetition rate of 9 MHz. It shows an efficiency of more than 20 % relative to the launched pump power. This level of performance for what is, arguably, the simplest ultrafast fiber laser architecture so far, demonstrates that all-fiber Mamyshev oscillators have great potential.

15:45 - 16:15

16:15

Networking Session @ MAGNOLIA HALWY

16:15 - 16:30

16:30

Title: How to prepare for life during and after graduate school
Piracha
AEye Inc., California, USA

Dr. Mohammad Umar Piracha received his PhD degree from the College of Optics (CREOL) at the University of Central Florida, where he developed a long range Lidar system using a mode locked laser, under the supervision of Prof. Peter Delfyett. He has been involved with several startups, including Luminar Technologies, and IMEC-USA. Dr. Piracha has 32 conference and journal publications, and 3 patents. He serves as a reviewer for NSF's SBIR program, and is currently working as a Staff Lidar Systems Engineer at AEye Inc., California.

16:30 - 17:00

16:00

Title: Breathing mode phenomena in the properties of the compact bright light pulse
Mabou Kamgaing William
University of Maroua, Cameroon

16:00 - 16:30

Speakers Slots Available

Speakers Slots Available

AWARDS AND CERTIFICATES ISSUANCE CONFERENCE CLOSING CERMONY

Nov 15, 2020 SCHEDULE

Conference Hall : CITRUS A
Coffee Break & Networking : MAGNOLIA HALWY
Lunch & Networking : "CITRUS AB"

Complimentary Networking Tour

Note: On November 15, 2020 (Sunday) we scheduled a Local Networking Tour (Locations: SeaWorld, Aquatica and Universal theme parks). Depends on the interest all registered attendees are eligible to enjoy this local networking tour, however this is upto the interest of the attendees. We are bringing together all our participants in the name of the bus trip with the purpose of engaging everybody and we believe this trip will fulfill the purpose of excellent networking between the participants.

This is not a part of the scientific Program, we would like to offer it for complimentary service for making our attendees feel happy by developing network with tall conference attendees. 

For more details, please write your queries at contact@exceleve.com 

1(347)-954-0127