Dr. Tomoyuki Uehara Profile

Dr. Tomoyuki Uehara

at National Defense Academy

SPIE Involvement:

Author

Publications (11)

Proceedings Article | 11 March 2024 Presentation + Paper

Microwave generation using optical beat note and microwave detection using electric-field sensor

Tomoyuki Uehara, Kenichiro Tsuji

Proceedings Volume 12885, 128850P (2024) https://doi.org/10.1117/12.2688180

KEYWORDS: Microwave radiation, Laser frequency, Sensors, Antennas, Optical fibers, Mach Zehnder interferometers

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SPIE Journal Paper | 30 April 2020

Nonlinear geometric phase shifting in optically generated gigahertz radio frequency signals for microwave photonics

Tomoyuki Uehara

OE, Vol. 59, Issue 04, 046111, (April 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.4.046111

KEYWORDS: Phase shifts, Geometrical optics, Radio optics, Nonlinear optics, Phase shifting, Polarizers, Microwave radiation, Microwave photonics, Wave plates, Optical spheres

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Proceedings Article | 7 March 2019 Paper

Optical frequency comb generation using femtosecond fiber laser and two types of optical fibers

T. Uehara, K. Tsuji

Proceedings Volume 10897, 1089726 (2019) https://doi.org/10.1117/12.2501755

KEYWORDS: Frequency combs, Nonlinear optics, Mode locking, Optical amplifiers, Optical fibers, Pulsed laser operation, Fiber lasers, Laser resonators, Negative feedback, Feedback control

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SPIE Journal Paper | 8 January 2018 Open Access

Microwave phase-control scheme based on optical beat wave generation and propagation in an optical fiber

Tomoyuki Uehara, Kenichiro Tsuji, Guido Mueller, David Tanner

OE, Vol. 57, Issue 01, 016106, (January 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.1.016106

KEYWORDS: Phase shifts, Optical fibers, Microwave radiation, Signal generators, Wave propagation, Laser stabilization, Control systems, Fiber lasers, Photodetectors, Optical engineering

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SPIE Journal Paper | 29 December 2014 Open Access

Optical beat-note frequency stabilization between two lasers using a radio frequency interferometer in the gigahertz frequency band

Tomoyuki Uehara, Kenichiro Tsuji, Kohei Hagiwara, Noriaki Onodera

OE, Vol. 53, Issue 12, 124109, (December 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.12.124109

KEYWORDS: Laser stabilization, Radio optics, Interferometers, Oscilloscopes, Signal generators, Microwave radiation, Spectrum analysis, Semiconductor lasers, Servomechanisms, Optical engineering

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Proceedings Article | 7 March 2014 Paper

RF-wave generation using external cavity laser diodes frequency-stabilized to single optical cavity by using orthogonal polarized modes

Tomoyuki Uehara, Kohei Hagiwara, Hidetoshi Tanigaki, Kenichiro Tsuji, Noriaki Onodera

Proceedings Volume 8985, 898513 (2014) https://doi.org/10.1117/12.2035474

KEYWORDS: Frequency modulation, Fermium, Laser stabilization, Optical resonators, Modulators, Mirrors, Photodetectors, Modulation, Servomechanisms, Phase shift keying

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SPIE Journal Paper | 1 April 2009

Physical-random number generation using white frequency-modulation noise of frequency-stabilized semiconductor lasers

Tomoyuki Uehara, Takashi Sato

OE, Vol. 48, Issue 04, 044301, (April 2009) https://doi.org/10.1117/12.10.1117/1.3123483

KEYWORDS: Semiconductor lasers, Laser stabilization, Fermium, Frequency modulation, Standards development, Rubidium, Binary data, Avalanche photodetectors, Data processing, Magnetism

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SPIE Journal Paper | 1 March 2009

Comparison of three semiconductor laser systems for gravitational wave detection

Tomoyuki Uehara, Akira Sato, Shinya Maehara, Toshiya Nimonji, Takashi Sato, Masashi Ohkawa, Takeo Maruyama, Seiji Kawamura

OE, Vol. 48, Issue 03, 034302, (March 2009) https://doi.org/10.1117/12.10.1117/1.3089887

KEYWORDS: Rubidium, Modulation, Semiconductor lasers, Signal detection, Laser stabilization, Magnetism, Absorption spectroscopy, Absorption, Avalanche photodetectors, Laser systems engineering

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Proceedings Article | 24 February 2009 Paper

Oscillation frequency stabilization of a semiconductor laser by an indirect modulation method using the Faraday effect

Akira Sato, Shinya Maehara, Tomoyuki Uehara, Hideaki Arai, Takashi Sato, Tadashi Tamura, Masashi Ohkawa, Seiji Kawamura

Proceedings Volume 7211, 72110A (2009) https://doi.org/10.1117/12.808803

KEYWORDS: Modulation, Semiconductor lasers, Magnetism, Absorption, Laser stabilization, Signal detection, Rubidium, Absorption spectroscopy, Gadolinium, Polarization

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Proceedings Article | 24 January 2008 Paper

Analytical discussion of semiconductor lasers for gravitational-wave detection

T. Uehara, A. Sato, T. Sato, M. Ohkawa, T. Maruyama, S. Kawamura

Proceedings Volume 6829, 68291H (2008) https://doi.org/10.1117/12.756222

KEYWORDS: Modulation, Magnetism, Signal detection, Semiconductor lasers, Laser stabilization, Optical filters, Interferometers, Absorption, Optical amplifiers, Polarization

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Proceedings Article | 22 March 2007 Paper

Laser diode frequency stabilization by means of optical feedback and the magneto-optical effect

T. Uehara, S. Maehara, T. Nimonji, T. Sato, M. Ohkawa, T. Maruyama, S. Kawamura

Proceedings Volume 6468, 64680D (2007) https://doi.org/10.1117/12.698306

KEYWORDS: Modulation, Semiconductor lasers, Magnetism, Laser stabilization, Signal detection, Absorption, Rubidium, Polarization, Avalanche photodetectors, Satellites

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Showing 5 of 11 publications

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