Dr. Junji Hirohashi Profile

Dr. Junji Hirohashi

Manager at Oxide Corp

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Author

Publications (9)

Proceedings Article | 4 March 2019 Presentation

Fabrication of PP-LBGO device for 266nm generation with the 1st order QPM structure (Conference Presentation)

Junji Hirohashi, Koichi Imai, Shunsuke Watanabe, Mitsuyoshi Sakairi, Yasuhiro Tomihari

Proceedings Volume 10902, 1090206 (2019) https://doi.org/10.1117/12.2514795

KEYWORDS: Ultraviolet radiation, Beam shaping, Electrodes, Nonlinear optical materials, Laser systems engineering, Control systems, Phase matching, Crystals, Pulsed laser operation

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Proceedings Article | 4 March 2019 Paper

Wavelength adjustability of PM-Yb-doped fiber laser based on FBGs for high power SHG generation

Kazuma Dobashi, Masayuki Hoshi, Koichi Imai, Junji Hirohashi, Satoshi Makio

Proceedings Volume 10902, 109021X (2019) https://doi.org/10.1117/12.2508151

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Second-harmonic generation, Reflectivity, Continuous wave operation, Tunable lasers, Light sources, Semiconductor lasers, Laser development, Frequency conversion

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Proceedings Article | 4 March 2019 Presentation + Paper

High-power, continuous-wave, scalable, single-frequency 852nm laser source for 213nm generation

Yushi Kaneda, Tsuyoshi Tago, Toshiaki Sasa, Masahiro Sasaura, Hiroaki Nakao, Junji Hirohashi, Yasunori Furukawa

Proceedings Volume 10902, 1090203 (2019) https://doi.org/10.1117/12.2506231

KEYWORDS: Resonators, Laser sources, Continuous wave operation, Fiber amplifiers, Oscillators, Harmonic generation

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Proceedings Article | 26 February 2018 Paper

Dual line CW fiber laser module based on FBG combination

Kazuma Dobashi, Masayuki Hoshi, Junji Hirohashi, Satoshi Makio

Proceedings Volume 10512, 1051225 (2018) https://doi.org/10.1117/12.2288061

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Continuous wave operation, Reflectivity, Polarization, Single mode fibers, Mirrors, Output couplers, Semiconductor lasers, Resonators

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Proceedings Article | 15 February 2018 Paper

Wavelength adjustability of frequency conversion light of Yb-doped fiber laser based on FBGs

Kazuma Dobashi, Yasuhiro Tomihari, Koichi Imai, Junji Hirohashi, Satoshi Makio

Proceedings Volume 10516, 105161I (2018) https://doi.org/10.1117/12.2288045

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Second-harmonic generation, Frequency conversion, Reflectivity, Beam shaping, Continuous wave operation, Phase matching, Tunable lasers, Light sources

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Proceedings Article | 22 August 2014 Paper

Investigation of PPSLT waveguides for applications in optical communication systems

André Albuquerque, Benjamin Puttnam, Junji Hirohashi, Miguel Drummond, Satoshi Shinada, Rogério Nogueira, Naoya Wada

Proceedings Volume 9286, 92861K (2014) https://doi.org/10.1117/12.2063760

KEYWORDS: Waveguides, Second-harmonic generation, Manufacturing, Optical communications, Collimators, Telecommunications, Lithium, Lithium niobate, Photorefraction, Phase matching

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Proceedings Article | 12 March 2013 Paper

Several watts compact CW green laser head without cooling by using PPMgSLT

Y. Tomihari, S. Makio, M. Hoshi, M. Hatori, J. Hirohashi, K. Imai, H. Motegi, Y. Furukawa

Proceedings Volume 8604, 860408 (2013) https://doi.org/10.1117/12.2003732

KEYWORDS: Head, Fiber lasers, Second-harmonic generation, Continuous wave operation, Visible radiation, Semiconductor lasers, Phase modulation, Connectors, Lasers, High power lasers

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Proceedings Article | 24 February 2009 Paper

Transient optical absorption upon femtosecond pulse irradiation in lithium niobate crystals

Satoshi Ashihara, Satoru Sasamoto, Junji Hirohashi

Proceedings Volume 7197, 719712 (2009) https://doi.org/10.1117/12.808578

KEYWORDS: Polarons, Absorption, Crystals, Anisotropy, Picosecond phenomena, Femtosecond phenomena, Lithium niobate, Polarization, Niobium, Ions

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Proceedings Article | 13 February 2008 Paper

Characterization of GRIIRA properties in LiNbO3 and LiTaO3 with different compositions and doping

J. Hirohashi, T. Tago, O. Nakamura, A. Miyamoto, Y. Furukawa

Proceedings Volume 6875, 687516 (2008) https://doi.org/10.1117/12.773742

KEYWORDS: Absorption, Crystals, Magnesium, Doping, Lithium, Interferometers, Nonlinear crystals, Infrared radiation, Scattering, Ultraviolet radiation

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Showing 5 of 9 publications

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