Prof. Raman Kashyap Profile

Roberto Morandotti, Nicola Montaut, Piotr Roztocki, Hao Yu, Mario Chemnitz, Stefania Sciara, Yoann Jestin, Benjamin MacLellan, Bennet Fischer, Michael Kues, Christian Reimer, Luis Cortes, Benjamin Wetzel, Yanbing Zhang, Sébastien Loranger, Raman Kashyap, Alfonso Cino, Sai Chu, Brent Little, David Moss, Lucia Caspani, William Munro, Jose Azana

Proceedings Volume PC12426, PC1242601 (2023) https://doi.org/10.1117/12.2654453

KEYWORDS: Quantum information processing, Quantum efficiency, Quantum computing, Quantum communications, Waveguides, Telecommunications, Switching, Silicon, Signal to noise ratio, Semiconductor lasers

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Proceedings Article | 4 March 2022 Presentation + Paper

Characteristics of Yb-doped silica fibers containing Y2O3 nanoparticles for optical refrigeration

Jyothis Thomas, Thomas Meyneng, Patricia Manarazan, Jean-Sebastien Boisvert, Steeve Morency, Nicolas Grégoire, Denis Seletskiy, Younès Messaddeq, Raman Kashyap, Amirhossein Tehranchi, Frederic Monet

Proceedings Volume 12018, 1201806 (2022) https://doi.org/10.1117/12.2611549

KEYWORDS: Ytterbium, Absorption, Luminescence, Ions, Optical fibers, Fiber lasers, Nanoparticles, Laser applications

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Proceedings Article | 5 March 2021 Presentation + Paper

Enhanced anti-Stokes emission in oxyfluoride glass ceramics for optical refrigeration

Jyothis Thomas, Thomas Meyneng, Yannick Ledemi, Denis Seletskiy, Younes Messaddeq, Raman Kashyap, Anthony Roberge, Jean-Sebastien Biosvert, Antsar Hlil, Lauro J. Q. Maia

Proceedings Volume 11702, 117020M (2021) https://doi.org/10.1117/12.2582809

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Proceedings Article | 11 March 2020 Presentation

ROGUE-based, random distributed feedback lasers (Conference Presentation)

Frédéric Monet, Victor Lambin-Iezzi, Jean-Sébastien Boisvert, Billie Maubois, Raman Kashyap

Proceedings Volume 11260, 112601J (2020) https://doi.org/10.1117/12.2546939

KEYWORDS: Fiber lasers, Optical fibers, Random lasers, Backscatter, Fiber Bragg gratings, Laser scattering, Laser optics, Rayleigh scattering, Raman scattering, UV optics

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Proceedings Article | 10 March 2020 Presentation

Extruded complex optical fiber structures for shape sensing and biomedical applications (Conference Presentation)

Pierre Lorre, Frédéric Monet, Matthieu Gauthier, Arthur Poiffaut, Anthony Roberge, Samuel Kadoury, Raman Kashyap

Proceedings Volume 11283, 112831F (2020) https://doi.org/10.1117/12.2546814

KEYWORDS: Optical fibers, Biomedical optics, Biosensing, Structural sensing, Polymers, Coating, Sensors, Backscatter, Optics manufacturing, Fiber optics sensors

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Proceedings Article | 24 February 2020 Presentation + Paper

Oxyfluoride glass-ceramics: a bright future for laser cooling

Thomas Meyneng, Yannick Ledemi, Ando Rakotonandrasana, Denis Seletskiy, Lauro J. Q. Maia, Younès Messaddeq, Raman Kashyap, Jyothis Thomas

Proceedings Volume 11298, 112980E (2020) https://doi.org/10.1117/12.2546969

KEYWORDS: Glasses, Ytterbium, Crystals, Absorption, Refractive index, Quantum efficiency, Luminescence, Oxides

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Proceedings Article | 28 August 2019 Paper

Towards a better understanding of the ROGUE

F. Monet, P. Lorre, J.-S. Boisvert, V. Lambin-Iezzi, Raman Kashyap

Proceedings Volume 11199, 111993D (2019) https://doi.org/10.1117/12.2541342

KEYWORDS: Backscatter, Signal to noise ratio, Ultraviolet radiation, Reflectivity, Sensors, Spatial resolution, Scattering, Signal attenuation, Ultrafast lasers, Fiber Bragg gratings

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Proceedings Article | 28 August 2019 Paper

Extruded optical fiber triplets for 3D shape sensing for minimally invasive surgery

P. Lorre, F. Monet, M. Gauthier, A. Poiffaut, A. Roberge, S. Kadoury, R. Kashyap

Proceedings Volume 11199, 111991L (2019) https://doi.org/10.1117/12.2541323

KEYWORDS: Sensors, Optical fibers, Coating, Backscatter, Surgery, Polymers, 3D surface sensing, Signal attenuation, Polymer optical fibers

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Proceedings Article | 7 March 2019 Presentation + Paper

High power single frequency, linearly polarized DFB Raman fiber laser operating at 1178 nm

Vladimir Karpov, Sebastien Loranger, Raman Kashyap

Proceedings Volume 10897, 108971O (2019) https://doi.org/10.1117/12.2508059

KEYWORDS: Fiber lasers, Fiber Bragg gratings, Raman spectroscopy, Laser scattering, Interferometers, Chemical elements, Phase modulation, Q switched lasers, Optical fibers, Chemical species

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Proceedings Article | 5 March 2019 Presentation

Order of magnitude increase in resolution of optical frequency domain reflectometry based temperature and strain sensing by the inscription of a ROGUE (Conference Presentation)

Samuel Kadoury, Frederic Monet, Sébastien Loranger, Victor Lambin-Iezzi, Raman Kashyap

Proceedings Volume 10914, 109140H (2019) https://doi.org/10.1117/12.2510390

KEYWORDS: Reflectometry, Optical resolution, Fiber Bragg gratings, Ultraviolet radiation, Temperature metrology, Optical fibers, Geometrical optics, Backscatter, Interferometers, Signal attenuation

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Optical frequency domain reflectometry (OFDR) has been investigated for two decades as a way to replace the sensing based on fibre Bragg gratings (FBG) currently used in most industries for those applications, using the intrinsic Rayleigh scatter of fibres instead. [1] OFDR allows completely distributed strain and temperature measurements along a fibre. The increase of backscatter using UV laser exposition was recently reported, and was found to increase the sensitivity in both temperature and strain sensing. [2] We present a technique allowing to increase by over 50 dB the backscattered signal amplitude, based on the writing of a Random Optical Grating by Ultraviolet or ultrafast laser Exposure, i.e. a very weak, random grating over the entire length of the fibre. This improvement is, to the authors’ knowledge, over 25 dB higher than what was previously reported for UV exposure for the same exposition power. [2] This ROGUE is generated by inducing phase noise during the continuous writing of a FBG using a Talbot interferometer. This leads to a grating with a very broad bandwidth regardless of the exposure length and greatly increases the signal without limiting the scanning bandwidth, resulting in no loss in resolution. Using these enhanced fibres, we obtained a noise level over an order of magnitude lower than using regular unexposed fibres, allowing measurements of smaller temperature variations. Fibres where such ROGUEs are inscribed also allow the use of a much smaller scanning bandwidth with similar accuracy, resulting in faster acquisition speed. REFERENCES [1] M. Froggatt and J. Moore, "High-spatial-resolution distributed strain measurement in optical fiber with rayleigh scatter," Appl Opt, vol. 37, no. 10, pp. 1735-40, Apr 1 1998. [2] S. Loranger, M. Gagne, V. Lambin-Iezzi, and R. Kashyap, "Rayleigh scatter based order of magnitude increase in distributed temperature and strain sensing by simple UV exposure of optical fibre," Sci Rep, vol. 5, p. 11177, Jun 16 2015.

Proceedings Article | 4 March 2019 Presentation

Perfecting ultra-long fiber Bragg gratings for compact Raman lasers (Conference Presentation)

Raman Kashyap

Proceedings Volume 10922, 1092202 (2019) https://doi.org/10.1117/12.2510016

KEYWORDS: Raman spectroscopy, Fiber lasers, Fiber Bragg gratings, Laser damage threshold, Oscillators, Phase shifts, Quantum electronics, Laser optics, Optical communications, Laser communications

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Proceedings Article | 14 March 2018 Presentation

Investigation of femtosecond laser written waveguide refractive index change in toughened glass: Towards integration of photonics device inside cellphone screens (Conference Presentation)

Jean-Sébastien Boisvert, Raman Kashyap, Antoine Drouin, Pierre Lorre

Proceedings Volume 10519, 105190U (2018) https://doi.org/10.1117/12.2290614

KEYWORDS: Glasses, Refractive index, Femtosecond phenomena, Waveguides, Photonic devices, Waveguide lasers, Lithium, Photonics, Optical sensors, Integrated optics

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Proceedings Article | 22 February 2018 Presentation + Paper

Structural and optical characterizations of Yb3+ doped GeO2-PbF2-PbO glass-ceramics for optical refrigeration

Lauro J. Maia, Jyothis Thomas, Kummara Krishnaiah, Denis Seletskiy, Yannick Ledemi, Younès Messaddeq, Raman Kashyap

Proceedings Volume 10550, 105500O (2018) https://doi.org/10.1117/12.2314234

KEYWORDS: Ytterbium, Glasses, Crystals, Absorption, Phonons, Ions, Luminescence, Quantum efficiency, Refractive index, Laser applications

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Proceedings Article | 22 February 2018 Paper

Laser cooling of solids: latest achievements and prospects

Raman Kashyap, Galina Nemova

Proceedings Volume 10550, 1055005 (2018) https://doi.org/10.1117/12.2292514

KEYWORDS: Ytterbium, Luminescence, Ions, Solids, Crystals, Glasses, Absorption, Phonons, Laser crystals

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Proceedings Article | 17 February 2017 Presentation + Paper

Surface phonon polaritons as a source of laser cooling perturbation

Galina Nemova, Raman Kashyap

Proceedings Volume 10121, 101210A (2017) https://doi.org/10.1117/12.2252424

KEYWORDS: Phonons, Polaritons, Ions, Luminescence, Temperature metrology, Solid state lasers, Solid state physics, Ytterbium, Wave propagation, Heat flux, Solids

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SPIE Journal Paper | 31 August 2016

Development of Yb³⁺-doped oxyfluoride glass-ceramics with low OH⁻ content containing CaF₂ nanocrystals for optical refrigeration

Venkata Krishnaiah Kummara, Yannick Ledemi, Elton Soares de Lima Filho, Galina Nemova, Younès Messaddeq, Raman Kashyap

OE, Vol. 56, Issue 01, 011103, (August 2016) https://doi.org/10.1117/12.10.1117/1.OE.56.1.011103

KEYWORDS: Glasses, Ytterbium, Nanocrystals, Crystals, Ions, Luminescence, Laser crystals, Laser applications, Ultraviolet radiation, Aluminum

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Proceedings Article | 23 March 2016 Paper

Progress in rare-earth-doped nanocrystalline glass-ceramics for laser cooling

Raman Kashyap, Yannick Ledemi, Younes Messaddeq, Kummara Venkata Krishnaiah, Elton Soares de Lima Filho, Sebastien Loranger, Galina Nemova

Proceedings Volume 9765, 97650L (2016) https://doi.org/10.1117/12.2213133

KEYWORDS: Glasses, Crystals, Ceramics, Luminescence, Solids, Spectroscopy, Laser crystals, Vitreous, Heat treatments, Ytterbium, Ions, Nanocrystals, Absorption, Quantum efficiency, Refractive index, Laser applications, Phonons

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Proceedings Article | 18 March 2016 Paper

3D shape tracking of minimally invasive medical instruments using optical frequency domain reflectometry

Francois Parent, Koushik Kanti Mandal, Sebastien Loranger, Eric Hideki Watanabe Fernandes, Samuel Kadoury, Raman Kashyap

Proceedings Volume 9786, 97862J (2016) https://doi.org/10.1117/12.2214998

KEYWORDS: Sensors, Optical tracking, Optical fibers, Reflectometry, Fiber Bragg gratings, Biomedical optics, 3D image processing, Image-guided intervention, Signal detection, Magnetic resonance imaging, Spatial resolution, Medical imaging

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Proceedings Article | 7 March 2016 Paper

Bottle micro-resonator temperature sensors for laser coolers

Galina Nemova, Raman Kashyap

Proceedings Volume 9765, 97650M (2016) https://doi.org/10.1117/12.2212811

KEYWORDS: Resonators, Microresonators, Solids, Luminescence, Fiber lasers, ZBLAN, Temperature sensors, Ions, Glasses, Laser resonators, Refractive index, Crystals, Sensors, Temperature metrology, Radio propagation

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Proceedings Article | 24 February 2016 Paper

Enhancement of Rayleigh scatter in optical fiber by simple UV treatment: an order of magnitude increase in distributed sensing sensitivity

Sébastien Loranger, François Parent, Victor Lambin-Iezzi, Raman Kashyap

Proceedings Volume 9744, 97440E (2016) https://doi.org/10.1117/12.2208896

KEYWORDS: Ultraviolet radiation, Fiber Bragg gratings, Spatial resolution, Sensors, Optical fibers, Temperature metrology, Laser scattering, Reflectometry, Refractive index, Germanium

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Proceedings Article | 22 May 2015 Paper

Long wavelength mid-infrared from mixing two colors from a fiber amplifier

Donna Strickland, Siyuan Bian, Sébastien Loranger, Raman Kashyap

Proceedings Volume 9467, 94672J (2015) https://doi.org/10.1117/12.2178022

KEYWORDS: Mid-IR, Fiber lasers, Optical isolators, Fiber amplifiers, Amplifiers, Optical amplifiers, Fiber Bragg gratings, Photonic crystal fibers, Mode locking, Explosives

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Proceedings Article | 18 March 2015 Paper

Calibration of a needle tracking device with fiber Bragg grating sensors

Koushik K. Mandal, Francois Parent, Sylvain Martel, Samuel Kadoury, Raman Kashyap

Proceedings Volume 9415, 94150X (2015) https://doi.org/10.1117/12.2081198

KEYWORDS: Fiber Bragg gratings, Calibration, Sensors, Radiofrequency ablation, Tumors, 3D metrology, Liver, Cameras, Optical tracking, 3D modeling

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Proceedings Article | 16 March 2015 Paper

2D constant-loss taper for mode conversion

Alexandre Horth, Nathaniel Quitoriano, Raman Kashyap

Proceedings Volume 9357, 93571S (2015) https://doi.org/10.1117/12.2079491

KEYWORDS: Waveguides, Silicon, Silica, Finite-difference time-domain method, Physics, Silicon photonics, Integrated optics, Oxides, Surface plasmons, Cladding

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Proceedings Article | 13 March 2015 Paper

Prospects of optical refrigeration in oxyfluoride glasses and glass-ceramics: experiments

Elton Soares de Lima Filho, Kummara Venkata Krishnaiah, Ye-Jin Yu, Yannick Ledemi, Younes Messaddeq, Raman Kashyap

Proceedings Volume 9380, 93800R (2015) https://doi.org/10.1117/12.2079912

KEYWORDS: Glasses, Quantum efficiency, Absorption, Luminescence, Integrating spheres, Phonons, Ytterbium, Fiber Bragg gratings, Crystals, Temperature metrology

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Proceedings Article | 10 March 2015 Paper

Optical refrigeration of Yb3+:YAG nanocrystals

Galina Nemova, Raman Kashyap

Proceedings Volume 9380, 938008 (2015) https://doi.org/10.1117/12.2077245

KEYWORDS: Nanocrystals, Ions, Phonons, Luminescence, Absorption, Ytterbium, Laser processing, YAG lasers, Spherical lenses, Photons

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Proceedings Article | 10 March 2015 Paper

Nanocrystallization in Yb3+-doped oxyfluoride glasses for laser cooling

Venkata Krishaniah Kummara, Yannick Ledemi, Younes Messaddeq, Raman Kashyap, Elton Soares de Lima Filho

Proceedings Volume 9380, 93800P (2015) https://doi.org/10.1117/12.2079459

KEYWORDS: Glasses, Ions, Luminescence, Crystals, Nanocrystals, Phonons, Transparency, Quantum efficiency, Laser applications, Refractive index

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Proceedings Article | 10 March 2015 Paper

Characterization of fluoride nanocrystals for optical refrigeration

Elton Soares de Lima Filho, Marta Quintanilla, Fiorenzo Vetrone, Galina Nemova, Raman Kashyap, Venkata Krishaniah Kummara

Proceedings Volume 9380, 93800Q (2015) https://doi.org/10.1117/12.2079856

KEYWORDS: Nanocrystals, Absorption, Ytterbium, Ions, Luminescence, Crystals, Quantum efficiency, Visible radiation, Spectroscopy, Optical cooling

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Proceedings Article | 27 February 2015 Paper

Shape and size controlled lead sulfide quantum dots for optical refrigeration applications

Gurinder Kaur, M. Bakshi, Raman Kashyap

Proceedings Volume 9373, 93730M (2015) https://doi.org/10.1117/12.2078279

KEYWORDS: Lead, Proteins, Quantum dots, Transmission electron microscopy, Luminescence, Optical spheres, Coating, Gemini Observatory, Quantum optics, Nanoparticles

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Proceedings Article | 2 June 2014 Paper

A novel refractive index sensor based on an induced micro-structure fiber

Raman Kashyap, Guei-Ru Lin, Mohamad Diaa Baiad, Mathieu Gagne, Wen-Fung Liu

Proceedings Volume 9157, 915773 (2014) https://doi.org/10.1117/12.2059086

KEYWORDS: Refractive index, Sensors, Cladding, Single mode fibers, Structured optical fibers, Optical fibers, Sensing systems, Scattering, Fiber optics sensors, Fiber lasers

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Proceedings Article | 2 May 2014 Paper

Laser cooling of CdSe quantum dots

Galina Nemova, Raman Kashyap

Proceedings Volume 9126, 91261B (2014) https://doi.org/10.1117/12.2052404

KEYWORDS: Luminescence, Phonons, Excitons, Semiconductors, Photons, Semiconductor lasers, Quantum dots, Crystals, Absorption, Cadmium

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Proceedings Article | 19 February 2014 Paper

Direct measurement of laser cooling of Yb:YAG crystal at atmospheric pressure using a fiber Bragg grating

Elton Soares de Lima Filho, Raman Kashyap, Galina Nemova, Sébastien Loranger

Proceedings Volume 9000, 90000I (2014) https://doi.org/10.1117/12.2040088

KEYWORDS: Fiber Bragg gratings, Absorption, Temperature metrology, Crystals, Photons, Laser crystals, Sensors, Luminescence, Fiber lasers, Optical fibers

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Proceedings Article | 19 February 2014 Paper

Temperature dynamics of laser cooling of solids with Yb3+ ions

Galina Nemova, Raman Kashyap

Proceedings Volume 9000, 90000H (2014) https://doi.org/10.1117/12.2038447

KEYWORDS: Ions, Absorption, Solids, Luminescence, YAG lasers, Energy transfer, Ytterbium, Phonons, Temperature metrology, Laser applications

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Proceedings Article | 11 October 2013 Paper

Recent advances in laser cooling of solids

Galina Nemova, Raman Kashyap

Proceedings Volume 8915, 89151T (2013) https://doi.org/10.1117/12.2037972

KEYWORDS: Ions, Luminescence, Semiconductors, Solids, Phonons, Photons, Absorption, Semiconductor lasers, Glasses, Electrons

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Proceedings Article | 20 May 2013 Paper

Optical fibre Bragg grating cladding mode sensors

R. Kashyap, M. Baiad, E. de Montigny, W.-J. Madore, N. Godbout, C. Boudoux, M. Gagné

Proceedings Volume 8794, 87941H (2013) https://doi.org/10.1117/12.2026073

KEYWORDS: Cladding, Sensors, Fiber Bragg gratings, Refractive index, Optical fibers, Fiber couplers, Signal attenuation, Signal analysis, Remote sensing, Photorefractive polymers

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Proceedings Article | 7 May 2013 Paper

Ultra-long and ultra high quality fibre Bragg gratings

Mathieu Gagné, Raman Kashyap

Proceedings Volume 8781, 87810M (2013) https://doi.org/10.1117/12.2017530

KEYWORDS: Fiber Bragg gratings, Signal processing, Dispersion, Fabrication, Electro optics, Modulation, Filtering (signal processing), Interferometers, Modulators, Optical components

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Proceedings Article | 14 March 2013 Paper

Wavelength tunable GHz repetition rate picosecond pulse generator using an SBS frequency comb

Victor Lambin Iezzi, Sébastien Loranger, Raman Kashyap

Proceedings Volume 8623, 86231S (2013) https://doi.org/10.1117/12.2002548

KEYWORDS: Picosecond phenomena, Frequency combs, Optical amplifiers, Acoustics, Pulsed laser operation, Laser scattering, Fiber lasers, Scattering, Phase shifts, Pulse generators

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Proceedings Article | 11 March 2013 Paper

Spectroscopic and life-time measurements of quantum dot doped glass for optical refrigeration: a feasibility study

Sébastien Loranger, Antoine Lesage-Landry, Elton Soares de Lima Filho, Galina Nemova, Noelio Dantas, Paulo Morais, Raman Kashyap

Proceedings Volume 8638, 86380I (2013) https://doi.org/10.1117/12.2002550

KEYWORDS: Luminescence, Glasses, Lead, Quantum efficiency, Absorption, Phonons, Quantum dots, Nanoparticles, Solids, Spectroscopy

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Proceedings Article | 21 February 2013 Paper

Laser cooling with rare-earth doped direct band gap semiconductors

Galina Nemova, Raman Kashyap

Proceedings Volume 8638, 863806 (2013) https://doi.org/10.1117/12.2001935

KEYWORDS: Ions, Semiconductors, Luminescence, Phonons, Absorption, Semiconductor lasers, Ytterbium, Heat treatments, Solids, Quenching (fluorescence)

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Proceedings Article | 24 October 2012 Paper

Pure surface plasmon-polariton optical sensor using an H-cross-section fiber and Bragg gratings

S. Tripathi, A. Kumar, R. Kashyap, M. D. Baiad

Proceedings Volume 8412, 84120J (2012) https://doi.org/10.1117/12.2001667

KEYWORDS: Sensors, Gold, Fiber Bragg gratings, Cladding, Metals, Refractive index, Interfaces, Waveguides, Signal to noise ratio, Wave propagation

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Proceedings Article | 24 October 2012 Paper

Laser cooling with nanoparticles

Galina Nemova, Elton Soares de Lima Filho, Sebastien Loranger, Raman Kashyap

Proceedings Volume 8412, 84121P (2012) https://doi.org/10.1117/12.2001317

KEYWORDS: Ions, Glasses, Luminescence, Absorption, Solids, Phonons, Oxides, Quantum efficiency, Crystals, Nanoparticles

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Proceedings Article | 1 May 2012 Paper

Laser cooling with Tm3+-doped nano-crystals of oxy-fluoride glass ceramic

Galina Nemova, Raman Kashyap

Proceedings Volume 8424, 84242I (2012) https://doi.org/10.1117/12.922163

KEYWORDS: Ions, Glasses, Oxides, Solids, Crystals, Luminescence, Phonons, Laser crystals, Quantum efficiency, Ceramics

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Proceedings Article | 16 February 2012 Paper

New nanosecond Q-switched 213 and 224nm lasers for fiber Bragg grating inscription in hydrogen-free fibers

Mathieu Gagné, Raman Kashyap

Proceedings Volume 8243, 824314 (2012) https://doi.org/10.1117/12.909215

KEYWORDS: Fiber Bragg gratings, Modulation, Fiber lasers, Q switched lasers, Absorption, Ultraviolet radiation, Laser sources, Optical fibers, Picosecond phenomena, Neodymium

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Proceedings Article | 8 February 2012 Paper

Laser cooling with lead-salt colloidal quantum dots doped in a glass host

Galina Nemova, Raman Kashyap

Proceedings Volume 8275, 82750B (2012) https://doi.org/10.1117/12.909430

KEYWORDS: Luminescence, Glasses, Absorption, Phonons, Ions, Excitons, Quantum efficiency, Semiconductors, Quantum dots, External quantum efficiency

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Proceedings Article | 31 August 2011 Paper

Super-radiance and fluorescence are two approaches to laser cooling of solids

Raman Kashyap, Galina Nemova

Proceedings Volume 8007, 80070I (2011) https://doi.org/10.1117/12.905627

KEYWORDS: Luminescence, Ions, Solids, Photons, Phonons, ZBLAN, Internal quantum efficiency, Glasses, Crystals, Laser crystals

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Proceedings Article | 22 February 2011 Paper

Flattop wideband wavelength converters based on cascaded sum and difference-frequency generation using step-chirped gratings

Amirhossein Tehranchi, Raman Kashyap

Proceedings Volume 7917, 79171D (2011) https://doi.org/10.1117/12.875154

KEYWORDS: Supercontinuum generation, Waveguides, Lithium niobate, Difference frequency generation, Second-harmonic generation, Sum-frequency generation, Wavelength division multiplexing, Wave propagation, Signal attenuation, Channel waveguides

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Proceedings Article | 12 February 2011 Paper

An ocular prosthesis which reacts to light

J.-F. Durette, S. Beaulieu, R. Kashyap, J. Lapointe, P. Boulos, A. Harhira, A. Shaat

Proceedings Volume 7885, 788512 (2011) https://doi.org/10.1117/12.874078

KEYWORDS: LCDs, Iris, Electrodes, Manufacturing, Diodes, Resistors, Liquid crystals, Electronic circuits, Eye, Polarizers

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Proceedings Article | 8 February 2011 Paper

Breaking the low phonon energy barrier for laser cooling in rare-earth doped hosts

Galina Nemova, Raman Kashyap

Proceedings Volume 7951, 79510G (2011) https://doi.org/10.1117/12.874066

KEYWORDS: Ions, Luminescence, Chemical species, Phonons, Photons, Solids, Pulsed laser operation, Laser energy, Internal quantum efficiency, ZBLAN

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Proceedings Article | 9 September 2010 Paper

High sensitivity inline fiber Mach-Zehnder interferometer bend sensor using a twin core fiber

Aissa Harhira, Raman Kashyap, Jerome Lapointe

Proceedings Volume 7653, 765315 (2010) https://doi.org/10.1117/12.866471

KEYWORDS: Sensors, Mach-Zehnder interferometers, Multimode fibers, Single mode fibers, Interferometers, Fiber optics sensors, Optical fibers, Raman spectroscopy, Photonics, Electrical engineering

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Proceedings Article | 4 May 2010 Paper

Yb3+-doped fiber laser with integrated optical cooler

Raman Kashyap, Galina Nemova

Proceedings Volume 7686, 768614 (2010) https://doi.org/10.1117/12.849835

KEYWORDS: Fiber lasers, Ions, Solid state lasers, Phonons, Integrated optics, Laser energy, Neodymium, High power lasers, Lasers, Signal processing

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Proceedings Article | 18 February 2010 Paper

High-power fiber lasers with integrated rare-earth optical cooler

Raman Kashyap, Galina Nemova

Proceedings Volume 7614, 761406 (2010) https://doi.org/10.1117/12.840752

KEYWORDS: Fiber lasers, Raman spectroscopy, Ions, Cladding, Photons, Laser resonators, Solid state lasers, Laser scattering, Luminescence, High power lasers

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Proceedings Article | 4 December 2009 Paper

Complex optical microcomponents for integrated-optic applications fabricated by laser ablation

R. Kashyap, A. Harhira, G. Vázquez, R. Bosisio

Proceedings Volume 7499, 749916 (2009) https://doi.org/10.1117/12.847104

KEYWORDS: Brain-machine interfaces, Laser ablation, Integrated optics, Multimode interference devices, Waveguides, Carbon dioxide lasers, Refractive index, Channel waveguides, Ultraviolet radiation, Microwave radiation

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Proceedings Article | 21 August 2009 Paper

High-efficiency pump-resonant quasi-phase-matched frequency doublers with flattop broadband responses

Raman Kashyap, Amirhossein Tehranchi

Proceedings Volume 7420, 74201C (2009) https://doi.org/10.1117/12.830686

KEYWORDS: Waveguides, Second-harmonic generation, Reflectivity, Mirrors, Apodization, Supercontinuum generation, Lithium niobate, Wave propagation, Atrial fibrillation, Phase matching

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Proceedings Article | 5 August 2009 Paper

Radiation-balanced Tm3+-doped fiber amplifier

Galina Nemova, Raman Kashyap

Proceedings Volume 7386, 73860L (2009) https://doi.org/10.1117/12.837164

KEYWORDS: Fiber amplifiers, Amplifiers, Fiber lasers, Ions, Luminescence, Cladding, Neodymium, Fluorine, Structured optical fibers, Thulium

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Proceedings Article | 10 February 2009 Paper

Guidewave surface plasmon-polariton sensors

Galina Nemova, Raman Kashyap

Proceedings Volume 7218, 72180W (2009) https://doi.org/10.1117/12.812072

KEYWORDS: Sensors, Refractive index, Metals, Fiber Bragg gratings, Waveguides, Wave propagation, Optical design, Energy transfer, Cladding, Structured optical fibers

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Proceedings Article | 10 February 2009 Paper

Optimization of tapered fiber sample for laser cooling of solids

Galina Nemova, Raman Kashyap

Proceedings Volume 7228, 72280J (2009) https://doi.org/10.1117/12.807868

KEYWORDS: Fiber lasers, Solids, Glasses, Ions, Ytterbium, Current controlled current source, Low-intensity laser therapy, Luminescence, Phonons, Absorption

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Proceedings Article | 12 August 2008 Paper

Phase interrogation of a planar integrated refractive index sensor

Raman Kashyap, Andrei Kabashin, Galina Nemova

Proceedings Volume 7099, 709926 (2008) https://doi.org/10.1117/12.806853

KEYWORDS: Spiral phase plates, Refractive index, Sensors, Metals, Waveguides, Fiber Bragg gratings, Radio propagation, Wave propagation, Interferometry, Mach-Zehnder interferometers

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Proceedings Article | 12 August 2008 Paper

Kilowatt-power Er3+ doped cladding fiber amplifier

Raman Kashyap, Galina Nemova

Proceedings Volume 7099, 70990Y (2008) https://doi.org/10.1117/12.807127

KEYWORDS: Cladding, Refractive index, Erbium, Optical amplifiers, Fiber amplifiers, Multimode fibers, Structured optical fibers, Amplifiers, Single mode fibers, Signal processing

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Proceedings Article | 11 August 2008 Paper

Microwave signal generation using an erbium-doped external cavity laser

Runnan Liu, Joe Seregelyi, Howard Rideout, Raman Kashyap, Stéphane Paquet

Proceedings Volume 7099, 70990O (2008) https://doi.org/10.1117/12.805321

KEYWORDS: Microwave radiation, Signal generators, Fiber lasers, Fiber Bragg gratings, Semiconductor lasers, Tunable lasers, Telecommunications, Broadband telecommunications, Heterodyning, Photodetectors

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Proceedings Article | 8 November 2007 Paper

Direct modulation of an ultra-long doped fiber external cavity semiconductor laser at multiples of the cavity resonant frequency

Raman Kashyap, Runnan Liu, Ke Wu

Proceedings Volume 6796, 67960X (2007) https://doi.org/10.1117/12.778934

KEYWORDS: Modulation, Semiconductor lasers, Microwave radiation, Fiber Bragg gratings, Fiber lasers, Resonance enhancement, Absorption, Mode locking, Refractive index, Distortion

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Proceedings Article | 13 February 2007 Paper

Improving bit error rate through multipath differential demodulation

Yannick Keith Lize, Louis Christen, Alan Willner, Scott Nuccio, Raman Kashyap

Proceedings Volume 6457, 64570F (2007) https://doi.org/10.1117/12.701671

KEYWORDS: Demodulation, Modulation, Receivers, Optical filters, Tolerancing, Logic devices, Free space optics, Error analysis, Phase shift keying, Optical calibration

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