Prof. Yasuhiro Koike Profile

Prof. Yasuhiro Koike

Director, Keio Photonics Research Institute at Keio Univ

SPIE Involvement:

Conference Chair | Conference Program Committee | Editor | Author

Publications (61)

Proceedings Article | 13 March 2024 Presentation + Paper

Needle-sized rigid endoscope using graded-index plastic optical fiber

Hiromasa Yamashita, Yasuhiro Koike, Masaya Nakamura

Proceedings Volume 12909, 129090H (2024) https://doi.org/10.1117/12.3008924

KEYWORDS: Endoscopes, Polymer optical fibers, Cameras, Glasses, Refractive index, Prototyping, Light sources and illumination, Surgery, Optical fibers, Relays

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Proceedings Article | 13 March 2024 Presentation

Graded-index plastic optical fiber for ultra-low bit error rate in high-speed multilevel PAM transmission

Kenta Muramoto, Yasuhiro Koike

Proceedings Volume 12909, 129090D (2024) https://doi.org/10.1117/12.3001419

KEYWORDS: Polymer optical fibers, Optical transmission, Telecommunications, Modulation, Forward error correction, Data transmission, Vertical cavity surface emitting lasers, Structured optical fibers, Reliability, Reflection

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Proceedings Article | 13 March 2024 Presentation

Design of random depolarization film using various birefringent particles for real-color displays

Shizuki Sasaki, Yasuhiro Koike

Proceedings Volume 12909, 129090C (2024) https://doi.org/10.1117/12.3002020

KEYWORDS: Particles, LCDs, Depolarization, Design and modelling, Polarized light, Dopants, Calcite, Polymers, Polymer thin films, Organic light emitting diodes

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Proceedings Article | 12 March 2024 Presentation

Recent progress in GI POF technologies toward Beyond 5G era

Kenta Muramoto, Yasuhiro Koike

Proceedings Volume PC12883, PC1288308 (2024) https://doi.org/10.1117/12.3006367

KEYWORDS: Phase only filters, Data transmission, Data centers, Telecommunications, Structured optical fibers, Polymer optical fibers, Optical interconnects, Materials properties, Light scattering, Error control coding

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Proceedings Article | 12 March 2024 Presentation

Stabilized plastic optical fiber interconnect without physical-contact fiber connection

Kenta Muramoto, Yasuhiro Koike

Proceedings Volume PC12892, PC1289208 (2024) https://doi.org/10.1117/12.3001437

KEYWORDS: Connectors, Polymer optical fibers, Data transmission, Reflection, Phase only filters, Optical interconnects, Optical fibers, Data centers, Reliability, Polishing

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Proceedings Article | 24 March 2023 Presentation

Analysis of depolarization effects of random depolarization film for real-color displays

S. Sasaki, Y. Koike

Proceedings Volume PC12444, PC1244406 (2023) https://doi.org/10.1117/12.2647491

KEYWORDS: Particles, Transmittance, Polymers, Polymer thin films, Polarization, Organic light emitting diodes, Liquid crystals, Image transmission, Calcite

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Proceedings Article | 14 March 2023 Presentation

Recent Progress of Photonics Polymer in Error-free POF and Real Color Display

Yasuhiro Koike

Proceedings Volume PC12418, PC124180D (2023) https://doi.org/10.1117/12.2655011

KEYWORDS: Polymers, Photonics, Phase only filters, Data centers, Birefringence, Polymer thin films, Data communications, Polymer optical fibers, Optical communications, Fiber optic communications

Proceedings Article | 14 March 2023 Presentation

Novel birefringence control by alternating copolymerization (Conference Presentation)

Hikaru Hotta, Yasuhiro Koike

Proceedings Volume PC12444, PC1244405 (2023) https://doi.org/10.1117/12.2655992

KEYWORDS: Birefringence, Polymers, Resistance, Photoelasticity, Optical properties, Lenses, Glasses

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Proceedings Article | 9 March 2023 Presentation

A novel graded-index plastic optical fiber interconnect enabling stable data transmission without precise fiber alignment

Kenta Muramoto, Yasuhiro Koike

Proceedings Volume PC12427, PC1242706 (2023) https://doi.org/10.1117/12.2648802

KEYWORDS: Data transmission, Optical alignment, Polymer optical fibers, Phase only filters, Modulation, Connectors, Transceivers, Tolerancing, Structured optical fibers, Single mode fibers

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Proceedings Article | 9 March 2022 Presentation

New plastic optical fiber and optical waveguide with flexible printed circuit of Nitto

Yuichi Tsujita, Tadao Okawa, Atsushi Yamagishi, Seiki Teraji, Satoshi Ito, Yasuto Ishimaru, Yasuhiro Koike

Proceedings Volume PC12025, PC1202508 (2022) https://doi.org/10.1117/12.2614617

KEYWORDS: Waveguides, Polymer optical fibers, Flex printed circuits, Transmittance, Televisions, Phase only filters, Optical communications, Modulation, Head, Data communications

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Proceedings Article | 9 March 2022 Presentation

Real-color displays with random depolarization film designed with respect to birefringence and particle size

Shizuki Sasaki, Yasuhiro Koike

Proceedings Volume PC12025, PC120250C (2022) https://doi.org/10.1117/12.2608371

KEYWORDS: Particles, Birefringence, Scattering, Refractive index, Polymers, Polymer thin films, Organic light emitting diodes, Liquid crystals, Light scattering, Calcite

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Proceedings Article | 9 March 2022 Presentation

Recent progress in high-bandwidth and low-noise GI POF toward UHD era

Yasuhiro Koike, Kenta Muramoto

Proceedings Volume PC12025, PC1202506 (2022) https://doi.org/10.1117/12.2610605

KEYWORDS: Phase only filters, Video, Radio over Fiber, Satellites, Televisions, Radio optics, Polymers, Polymer optical fibers, Optical fibers, Optical fiber cables

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Proceedings Article | 5 March 2022 Presentation

Graded-index plastic optical fiber for error-free PAM-4 transmission without forward error correction

Kenta Muramoto, Yasuhiro Koike

Proceedings Volume PC12007, PC120070L (2022) https://doi.org/10.1117/12.2609455

KEYWORDS: Forward error correction, Telecommunications, Polymer optical fibers, Phase only filters, Modulation, Data transmission, Vertical cavity surface emitting lasers, Reliability, Optical interconnects, Multimode fibers

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Proceedings Article | 5 March 2021 Presentation

Design of calcite-doped random depolarization films for real-color displays

Shizuki Sasaki, Mariko Udono, Yasuhiro Koike

Proceedings Volume 11709, 117090S (2021) https://doi.org/10.1117/12.2578046

KEYWORDS: Particles, Light scattering, Doping, Calcite, Scattering, Polymers, Polymer thin films, Polarizers, Organic light emitting diodes, Liquid crystals

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Proceedings Article | 5 March 2021 Presentation

Indoor radio-over-fiber system based on graded-index plastic optical fiber for broadband wireless communication

Kenta Muramoto, Azusa Inoue, Yasuhiro Koike

Proceedings Volume 11709, 117090M (2021) https://doi.org/10.1117/12.2576469

KEYWORDS: Radio over Fiber, Telecommunications, Wireless communications, Polymer optical fibers, Phase only filters, Distortion, Optical fibers, Nonlinear optics, Fiber lasers

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Proceedings Article | 5 March 2021 Presentation

Low-noise graded-index plastic optical fiber for multi-fiber interconnect

Haruka Minami, Azusa Inoue, Yasuhiro Koike

Proceedings Volume 11709, 117090N (2021) https://doi.org/10.1117/12.2578082

KEYWORDS: Polymer optical fibers, Phase only filters, Connectors, Signal to noise ratio, Modulation, Data transmission, Data communications, Tolerancing, Silica, Signal attenuation

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Proceedings Article | 5 March 2021 Presentation

Welcome and Introduction to SPIE Conference 11709 "Ultra-High-Definition Imaging Systems IV"

Seizo Miyata, Toyohiko Yatagai, Yasuhiro Koike

Proceedings Volume 11709, 1170902 (2021) https://doi.org/10.1117/12.2592203

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Proceedings Article | 5 March 2021 Presentation

Design and synthesis of triple-zero-birefringence polymer by using alternating copolymer

Kohei Watanabe, Yuma Kobayashi, Yasuhiro Koike

Proceedings Volume 11709, 117090Q (2021) https://doi.org/10.1117/12.2583322

KEYWORDS: Polymers, Birefringence, LCDs, Temperature metrology, Resistance, Photoelasticity, Transparency, Televisions, Tablets, Polymer thin films

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Proceedings Article | 17 June 2019 Open Access

Advanced photonics polymer for real color imaging systems towards 8K era (Conference Presentation) (Withdrawal Notice)

Yasuhiro Koike

Proceedings Volume 10557, 105570G (2019) https://doi.org/10.1117/12.2300756

KEYWORDS: Imaging systems, Photonics, Polymers, Color imaging

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Proceedings Article | 4 March 2019 Presentation

Development of birefringent crystal-dispersed low-retardation/high-transparent polyimide film (Conference Presentation)

Hikaru Hotta, Katsuya Sakayori, Toshio Yoshihara, Norinaga Nakamura, Chikafumi Tanaka, Yasuhiro Koike

Proceedings Volume 10943, 109430J (2019) https://doi.org/10.1117/12.2508293

KEYWORDS: Crystals, Birefringence, Air contamination, Resistance, Doping, Polymers, Particles, Strontium, Carbonates

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Proceedings Article | 31 July 2018 Paper

Low-noise graded-index plastic optical fibers for consumer-friendly pluggable 8K optical interconnect (Conference Presentation) (Withdrawal Notice)

Azusa Inoue, Yasuhiro Koike

Proceedings Volume 10557, 105570W (2018) https://doi.org/10.1117/12.2289239

KEYWORDS: Phase only filters, Video, Polymer optical fibers, Interfaces, Denoising, Optical interconnects, Multimode fibers, Vertical cavity surface emitting lasers, Safety, Amplitude modulation

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Proceedings Article | 14 March 2018 Presentation

Ballpoint-pen interconnect of graded-index plastic optical fiber for pluggable optical interface cable (Conference Presentation)

Yugo Kaseda, Azusa Inoue, Akihito Mitsui, Hitoshi Suzuki, Yasuhiro Koike

Proceedings Volume 10557, 105570V (2018) https://doi.org/10.1117/12.2289828

KEYWORDS: Phase only filters, Connectors, Polymer optical fibers, Data transmission, Interfaces, Fiber optic communications, Optical communications, Quality measurement, Collimation, Multimode fibers

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Proceedings Article | 14 March 2018 Presentation

Significantly improved frequency response by low-noise graded-index plastic optical fiber (Conference Presentation)

Kenta Muramoto, Azusa Inoue, Yasuhiro Koike

Proceedings Volume 10557, 105570H (2018) https://doi.org/10.1117/12.2289441

KEYWORDS: Modulation, Vertical cavity surface emitting lasers, Phase only filters, Polymer optical fibers, Silica, Optical fibers, Optical communications, Data transmission, Televisions, Multimode fibers

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Proceedings Article | 14 March 2018 Presentation

Analysis of heat shrinkage of uniaxially heat-drawn films and synthesis of heat-resistant temperature-independent zero-birefringence polymer (Conference Presentation)

Yuma Kobayashi, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 10557, 105570B (2018) https://doi.org/10.1117/12.2288980

KEYWORDS: Polymers, Birefringence, Polymer thin films, LCDs, Analytical research, Image quality, Photoelasticity, Temperature metrology, Glasses, Displays

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Proceedings Article | 21 April 2017 Presentation

Design of temperature-independent zero-birefringence pressure sensitive adhesives (Conference Presentation)

Kaoru Kosaka, Houran Shafiee, Hiroyuki Ogawa, Sumihisa Oda, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 10125, 101250Q (2017) https://doi.org/10.1117/12.2250682

KEYWORDS: Industrial chemicals, Birefringence, Polymers, LCDs, Adhesives, Temperature metrology, Polarizers, Glasses, Humidity, Image quality

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Proceedings Article | 2 June 2014 Paper

Evaluation of Brillouin frequency shift and its temperature dependence in poly(pentafluorostyrene)-based polymer optical fibers by ultrasonic pulse-echo technique

Kazunari Minakawa, Kotaro Koike, Neisei Hayashi, Yasuhiro Koike, Yosuke Mizuno, Kentaro Nakamura

Proceedings Volume 9157, 91579C (2014) https://doi.org/10.1117/12.2059434

KEYWORDS: Polymer optical fibers, Polymers, Ultrasonics, Acoustics, Refractive index, Scattering, Optical fibers, Single mode fibers, Temperature metrology, Glasses

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Proceedings Article | 7 March 2014 Paper

Longitudinal versus transversal excitation in doped graded-index polymer optical fibers

M. Illarramendi, J. Arrue, I. Ayesta, F. Jiménez, J. Zubia, I. Bikandi, A. Tagaya, Y. Koike

Proceedings Volume 8983, 89830G (2014) https://doi.org/10.1117/12.2037797

KEYWORDS: Phase only filters, Polymer optical fibers, Absorption, Fiber lasers, Optical filters, Molecules, Polymers, Fiber optics, Sensors, Nd:YAG lasers

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Proceedings Article | 2 February 2011 Paper

A wide-viewing-angle liquid-crystal display using front-scattering film and directional backlight

T. Saruta, A. Tagaya, Y. Koike

Proceedings Volume 7955, 79550G (2011) https://doi.org/10.1117/12.874415

KEYWORDS: Particles, Scattering, LCDs, Light scattering, Mie scattering, Liquid crystals, Multilayers, Refractive index, Polymer thin films, Polymers

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Proceedings Article | 1 March 2010 Paper

The effect of trans-stilbene unit in the compensation of birefringence of poly(methyl methacrylate) in the random copolymerization method and anisotropic molecule dopant method

Houran Shafiee, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 7599, 75990U (2010) https://doi.org/10.1117/12.848869

KEYWORDS: Birefringence, Photoelasticity, Polymers, Polymethylmethacrylate, Molecules, Polymerization, Glasses, Protactinium, Polymer thin films, Optical components

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Proceedings Article | 17 February 2009 Paper

Power flow equation analysis of graded-index polymer optical fibers

Kazuma Nehashi, Yasuhiro Koike

Proceedings Volume 7213, 721318 (2009) https://doi.org/10.1117/12.808643

KEYWORDS: Phase only filters, Signal attenuation, Refractive index, Radio propagation, Digital micromirror devices, Polymethylmethacrylate, Wave propagation, Polymer optical fibers, Finite element methods, Optical fibers

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Proceedings Article | 12 February 2009 Paper

Birefringence analysis of a photonics polymer doped with a birefringent crystal

Yukiko Yamada, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 7213, 72130W (2009) https://doi.org/10.1117/12.807606

KEYWORDS: Birefringence, Polymers, Crystals, Polymer thin films, Refractive index, Transparency, Statistical analysis, Photorefractive polymers, Photoelasticity, Doping

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Proceedings Article | 12 February 2009 Paper

Reduction of orientational birefringence of polymer using nanoparticles

T. Otani, A. Tagaya, Y. Koike

Proceedings Volume 7213, 721310 (2009) https://doi.org/10.1117/12.808128

KEYWORDS: Polymethylmethacrylate, Silica, Particles, Nanoparticles, Birefringence, Photoelasticity, Polymers, Transparency, Polymer thin films, Nanocomposites

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Proceedings Article | 12 February 2009 Paper

Dopant designing for thermally stable graded index plastic optical fiber

Y. Yamaki, A. Kondo, Y. Koike

Proceedings Volume 7213, 72130X (2009) https://doi.org/10.1117/12.808092

KEYWORDS: Phase only filters, Signal attenuation, Refractive index, Double positive medium, Polymethylmethacrylate, Molecules, Optical fibers, Polymers, Diffusion, Polymer optical fibers

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Proceedings Article | 12 February 2009 Paper

Application of polymer graded-index materials for aberration correction of progressive addition lenses

Yuki Shitanoki, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 7213, 72130L (2009) https://doi.org/10.1117/12.808451

KEYWORDS: GRIN lenses, Monochromatic aberrations, Diffusion, Polymers, Refractive index, Distortion, Ultraviolet radiation, Aberration correction, Polymerization, Glasses

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Proceedings Article | 12 February 2008 Paper

Noise reduction for fiber optic NTSC signal transmission

Rei Furukawa, Keiji Uehara, Satoshi Takahashi, Nobuhiro Ohtsu, Yasuhiro Koike

Proceedings Volume 6896, 68960T (2008) https://doi.org/10.1117/12.762915

KEYWORDS: Light sources, Fiber optics, Analog electronics, Multimode fibers, Speckle pattern, Vertical cavity surface emitting lasers, Oscilloscopes, Polymer optical fibers, Semiconductor lasers, Optical fibers

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Proceedings Article | 28 September 2007 Paper

Fiber optic transmission of analog signals

Rei Furukawa, Keiji Uehara, Satoshi Takahashi, Nobuhiro Ohtsu, Yasuhiro Koike

Proceedings Volume 6653, 66530G (2007) https://doi.org/10.1117/12.734030

KEYWORDS: Analog electronics, Fiber optics, Multimode fibers, Signal attenuation, Phase only filters, Speckle pattern, Polymer optical fibers, Optical fibers, Single mode fibers, Polymers

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Proceedings Article | 7 February 2007 Paper

Preparation of graded-index plastic optical fiber by co-extrusion process

Ryoma Hirose, Makoto Asai, Atsushi Kondo, Yasuhiro Koike

Proceedings Volume 6470, 64700K (2007) https://doi.org/10.1117/12.700193

KEYWORDS: Diffusion, Refractive index, Polymers, Polymer optical fibers, Cladding, Polymethylmethacrylate, Photorefractive polymers, Polymerization, Double positive medium, Optical fibers

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Proceedings Article | 7 February 2007 Open Access

Photonics polymer for fiber to-the-display

Yasuhiro Koike

Proceedings Volume 6470, 64700I (2007) https://doi.org/10.1117/12.710538

KEYWORDS: Polymers, Birefringence, Photoelasticity, Photonics, Polymer optical fibers, Crystals, Polymethylmethacrylate, Molecules, Phase only filters, LCDs

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Proceedings Article | 23 February 2006 Paper

Synthesis of a zero-birefringence polymer by doping with a nano-size birefringent crystal

Hisanori Ohkita, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 6117, 611716 (2006) https://doi.org/10.1117/12.645379

KEYWORDS: Polymers, Birefringence, Polymer thin films, Crystals, Doping, Transparency, Air contamination, Glasses, Refractive index, Transmittance

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Proceedings Article | 28 May 2004 Paper

High-definition projection screen based on multiple light scattering technique

Hiromasa Suzuki, Takamitsu Okumura, Akihiro Tagaya, Eizaburo Higuchi, Yasuhiro Koike

Proceedings Volume 5289, (2004) https://doi.org/10.1117/12.526273

KEYWORDS: Particles, Light scattering, Molecules, Monte Carlo methods, Ocean optics, Transmittance, Carbon, Polymers, Antireflective coatings, Mie scattering

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Proceedings Article | 19 November 2003 Paper

Scattering analysis of highly scattering optical transmission polymer and its application to LCD displays

Takamitsu Okumura, Takeshi Ishikawa, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 4829, (2003) https://doi.org/10.1117/12.529997

KEYWORDS: Polymers, Scattering, Mie scattering, Particles, LCDs, Light scattering, Multiple scattering, Monte Carlo methods, Transmittance, Scatter measurement

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Proceedings Article | 16 July 2003 Paper

Novel photonics polymer and its application in IT

Yasuhiro Koike

Proceedings Volume 5061, (2003) https://doi.org/10.1117/12.517311

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Proceedings Article | 17 September 2002 Paper

Highly scattering optical transmission polymer and its application for LCD display

Takamitsu Okumura, Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 4918, (2002) https://doi.org/10.1117/12.483058

KEYWORDS: Polymers, Mie scattering, Scattering, Particles, Multiple scattering, Light scattering, LCDs, Monte Carlo methods, Transmittance, Waveguides

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Proceedings Article | 13 June 2002 Paper

Plastic optical fibers containing lanthanide chelates and organic dyes for laser and amplifier applications

Ken Kuriki, Susumu Nishihara, Y. Nishizawa, Akihiro Tagaya, Yasuhiro Koike, Yoshiyuki Okamoto

Proceedings Volume 4642, (2002) https://doi.org/10.1117/12.470439

KEYWORDS: Rod lasers, Absorption, Glasses, Polymer optical fibers, Lanthanides, Ions, Luminescence, Fiber lasers, Laser damage threshold, Fiber amplifiers

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Proceedings Article | 29 October 2001 Paper

Zero-birefringence polymers for optical devices

Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 4594, (2001) https://doi.org/10.1117/12.446564

KEYWORDS: Birefringence, Polymers, Molecules, Polymethylmethacrylate, Particles, Polarizability, Doping, Optical components, Silica, Anisotropy

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Proceedings Article | 19 May 2000 Paper

High-performance polymer optical fiber lasers and amplifiers

Ken Kuriki, Takeyuki Kobayashi, Nana Imai, Toshihiko Tamura, Akihiro Tagaya, Yasuhiro Koike, Yoshiyuki Okamoto

Proceedings Volume 3939, (2000) https://doi.org/10.1117/12.386385

KEYWORDS: Optical fibers, Fiber lasers, Rhodamine, Absorption, Polymers, Luminescence, Dye lasers, Polymer optical fibers, Phase only filters, Polymerization

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Proceedings Article | 13 April 2000 Paper

Rare-earth-doped polymer optical fibers for optical amplification

Takeyuki Kobayashi, Ken Kuriki, Susumu Nishihara, Yoshiyuki Okamoto, Yasuhiro Koike

Proceedings Volume 3942, (2000) https://doi.org/10.1117/12.382853

KEYWORDS: Ions, Europium, Polymer optical fibers, Polymers, Neodymium, Luminescence, Spectroscopy, Oscillators, Absorption, Polymerization

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Proceedings Article | 12 November 1999 Paper

High-speed plastic optical fibers and amplifiers

Yasuhiro Koike

Proceedings Volume 3896, (1999) https://doi.org/10.1117/12.370318

KEYWORDS: Phase only filters, Polymers, Signal attenuation, Polymethylmethacrylate, Luminescence, Absorption, Polymer optical fibers, Multimode fibers, Digital micromirror devices, Silica

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Proceedings Article | 12 November 1999 Paper

Highly scattering optical transmission polymers for liquid crystal display

Akihiro Tagaya, Yasuhiro Koike

Proceedings Volume 3896, (1999) https://doi.org/10.1117/12.370309

KEYWORDS: Light scattering, Polymers, Scattering, Prisms, Particles, LCDs, Mie scattering, Transmittance, Lamps, Monte Carlo methods

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Proceedings Article | 5 October 1999 Paper

Recent progress of polymer optical fiber for high-speed data communication

Yasuhiro Koike, Takaaki Ishigure

Proceedings Volume 3799, (1999) https://doi.org/10.1117/12.363910

KEYWORDS: Phase only filters, Polymers, Signal attenuation, Polymethylmethacrylate, Digital micromirror devices, Multimode fibers, Polymer optical fibers, Silica, Data communications, Optical fibers

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Proceedings Article | 18 May 1999 Paper

High-power polymer optical fiber lasers and amplifiers

Takeyuki Kobayashi, Ken Kuriki, Nana Imai, Toshihiko Tamura, Keisuke Sasaki, Yasuhiro Koike, Yoshiyuki Okamoto

Proceedings Volume 3623, (1999) https://doi.org/10.1117/12.348400

KEYWORDS: Europium, Fiber lasers, Polymers, Luminescence, Polymer optical fibers, Ions, Polymethylmethacrylate, Rhodamine, Polymerization, Solid state lasers

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Proceedings Article | 22 June 1998 Paper

High-speed plastic optical fibers and amplifiers

Yasuhiro Koike, Takaaki Ishigure, Takeyuki Kobayashi, Eisuke Nihei

Proceedings Volume 3419, 34190Z (1998) https://doi.org/10.1117/12.311020

KEYWORDS: Polymer optical fibers, Optical amplifiers, Phase only filters, Fiber amplifiers, Signal attenuation, Refractive index, Photorefractive polymers, Polymers, Humidity, Visible radiation

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Proceedings Article | 17 April 1998 Paper

High-bandwidth and high-thermal-stability graded-index polymer optical fiber

Takaaki Ishigure, Masataka Sato, Eisuke Nihei, Yasuhiro Koike

Proceedings Volume 3281, (1998) https://doi.org/10.1117/12.305442

KEYWORDS: Phase only filters, Refractive index, Signal attenuation, Polymers, Polymethylmethacrylate, Photorefractive polymers, Polymer optical fibers, Double positive medium, Humidity, Absorption

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Proceedings Article | 17 April 1998 Paper

Polymer optical fiber amplifiers for communication and sensor applications

Takeyuki Kobayashi, Keisuke Sasaki, Yasuhiro Koike, Yoshiyuki Okamoto

Proceedings Volume 3281, (1998) https://doi.org/10.1117/12.305444

KEYWORDS: Luminescence, Phase only filters, Polymer optical fibers, Polymethylmethacrylate, Rhodamine, Optical amplifiers, Absorption, Fiber amplifiers, Europium, Rhodamine B

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Proceedings Article | 17 April 1998 Paper

High-performance LCD backlight using a highly scattering optical transmission polymer

Akihiro Horibe, Eisuke Nihei, Yasuhiro Koike

Proceedings Volume 3281, (1998) https://doi.org/10.1117/12.305440

KEYWORDS: Polymers, Light scattering, Scattering, LCDs, Mie scattering, Monte Carlo methods, Particles, Photons, Multiple scattering, Lamps

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Proceedings Article | 10 December 1996 Paper

New cladding polymer for optical oxygen sensor using fluorescent plastic fiber

Masayuki Morisawa, Kohji Uchiyama, Toshiki Hosaka, Hideaki Inoue, Shinzo Muto, Akira Namazue, Eisuke Nihei, Yasuhiro Koike

Proceedings Volume 2836, (1996) https://doi.org/10.1117/12.260609

KEYWORDS: Sensors, Oxygen, Luminescence, Phase only filters, Cladding, Polymers, Polymer optical fibers, Humidity, Polymeric sensors, Molecules

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Proceedings Article | 30 September 1996 Paper

Phase-matched operation of polymer TE-TM mode converter

Shinzo Muto, Tomoyasu Sakagami, Yoshihiko Sakane, Akira Namazue, Eisuke Nihei, Yasuhiro Koike

Proceedings Volume 2851, (1996) https://doi.org/10.1117/12.251823

KEYWORDS: Polymers, Birefringence, Active optics, Waveguides, Integrated optics, Wave propagation, Refractive index, Fused quartz, Crystals, Dielectrics

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Proceedings Article | 3 October 1994 Paper

High-power polymer optical fiber amplifiers and their applications

Tsuyoshi Yamamoto, Kazuhito Fujii, Shigehiro Teramoto, Akihiro Tagaya, Eisuke Nihei, Takeshi Kinoshita, Yasuhiro Koike, Keisuke Sasaki

Proceedings Volume 2289, (1994) https://doi.org/10.1117/12.188705

KEYWORDS: Polymer optical fibers, Rhodamine B, Optical amplifiers, Dye lasers, High power fiber amplifiers, Oscillators, Signal attenuation, Absorption, Liquids, Rhodamine

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Proceedings Article | 1 November 1993 Paper

High-bandwidth organic dye-doped polymer optical fiber amplifier

Tsuyoshi Yamamoto, Kazuhito Fujii, Shigehiro Teramoto, Akihiro Tagaya, Eisuke Nihei, Takeshi Kinoshita, Yasuhiro Koike, Keisuke Sasaki

Proceedings Volume 2024, (1993) https://doi.org/10.1117/12.161350

KEYWORDS: Polymer optical fibers, Rhodamine B, Absorption, Polymethylmethacrylate, Fiber amplifiers, Telecommunications, Optical amplifiers, Dye lasers, Polymers, Refractive index

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Proceedings Article | 9 February 1993 Paper

High-bandwidth (2GHz km) low-loss (56dB/km) GI polymer optical fiber

Takaaki Ishigure, Eisuke Nihei, Yasuhiro Koike

Proceedings Volume 1799, (1993) https://doi.org/10.1117/12.141362

KEYWORDS: Phase only filters, Signal attenuation, Polymer optical fibers, Refractive index, Polymers, Local area networks, Polymethylmethacrylate, Light, Photonics, Oscilloscopes

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Proceedings Article | 1 December 1991 Paper

Graded-index polymer optical fiber by new random copolymerization technique

Yasuhiro Koike, Yukie Hondo, Eisuke Nihei

Proceedings Volume 1592, (1991) https://doi.org/10.1117/12.50994

KEYWORDS: Phase only filters, Scattering, Polymer optical fibers, Light scattering, Refractive index, Signal attenuation, Polymers, Polymerization, Polymethylmethacrylate, Rayleigh scattering

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Showing 5 of 61 publications

Proceedings Volume Editor (15)

SPIE Conference Volume | 27 March 2024

Ultra-High-Definition Imaging Systems VII

SPIE Conference Volume | 3 April 2023

Ultra-High-Definition Imaging Systems VI

SPIE Conference Volume | 28 March 2022

Ultra-High-Definition Imaging Systems V

SPIE Conference Volume | 16 April 2021

Ultra-High-Definition Imaging Systems IV

SPIE Conference Volume | 3 March 2020

Ultra-High-Definition Imaging Systems III

Showing 5 of 15 publications

Conference Committee Involvement (25)

Ultra-High-Definition Imaging Systems VIII

29 January 2025 | San Francisco, California, United States

Organic Photonic Materials and Devices XXVII

29 January 2025 | San Francisco, California, United States

Organic Photonic Materials and Devices XXVI

31 January 2024 | San Francisco, California, United States

Ultra-High-Definition Imaging Systems VII

29 January 2024 | San Francisco, California, United States

Ultra-High-Definition Imaging Systems VI

1 February 2023 | San Francisco, California, United States

Organic Photonic Materials and Devices XXV

1 February 2023 | San Francisco, California, United States

Ultra-High-Definition Imaging Systems V

21 February 2022 | San Francisco, California, United States

Organic Photonic Materials and Devices XXIV

26 January 2022 | San Francisco, California, United States

Organic Photonic Materials and Devices XXIII

6 March 2021 | Online Only, California, United States

Ultra-High-Definition Imaging Systems IV

6 March 2021 | Online Only, California, United States

SPIE OPTO

6 March 2021 | Online Only, United States

Organic Photonic Materials and Devices XXII

5 February 2020 | San Francisco, California, United States

Ultra-High-Definition Imaging Systems III

3 February 2020 | San Francisco, California, United States

SPIE OPTO

1 February 2020 | San Francisco, United States

Organic Photonic Materials and Devices XXI

5 February 2019 | San Francisco, California, United States

Ultra-High-Definition Imaging Systems II

2 February 2019 | San Francisco, California, United States

Ultra-High-Definition Imaging Systems

31 January 2018 | San Francisco, California, United States

Organic Photonic Materials and Devices XX

31 January 2018 | San Francisco, California, United States

Organic Photonic Materials and Devices XIX

30 January 2017 | San Francisco, California, United States

Organic Photonic Materials and Devices XVIII

15 February 2016 | San Francisco, California, United States

Organic Photonic Materials and Devices XVII

9 February 2015 | San Francisco, California, United States

Organic Photonic Materials and Devices XVI

3 February 2014 | San Francisco, California, United States

Organic Photonic Materials and Devices XV

4 February 2013 | San Francisco, California, United States

Organic Photonic Materials and Devices XIV

23 January 2012 | San Francisco, California, United States

Organic Photonic Materials and Devices XIII

24 January 2011 | San Francisco, California, United States

Showing 5 of 25 Conference Committees

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