Mr. Tsuyoshi Hirao Profile

Tsuyoshi Hirao

at Nichia Corp

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Author

Publications (7)

Proceedings Article | 8 March 2024 Presentation + Paper

Development of highly efficient blue and green edge-emitting laser diodes

Katsuhiro Kishimoto, Tsuyoshi Hirao, Tomonori Morizumi, Yoji Nagao, Yoshitaka Nakatsu, Tomoya Yanamoto, Shin-ichi Nagahama

Proceedings Volume 12886, 1288609 (2024) https://doi.org/10.1117/12.2692586

KEYWORDS: Continuous wave operation, Semiconductor lasers, Light sources, Gallium nitride, Metalorganic chemical vapor deposition, Reliability, RGB color model, Ultraviolet radiation

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Proceedings Article | 15 March 2023 Presentation + Paper

Blue and green edge-emitting laser diodes and vertical-cavity surface emitting lasers on C-plane GaN substrates

Yoshitaka Nakatsu, Tsuyoshi Hirao, Tomonori Morizumi, Yoji Nagao, Kenichi Terao, Hitoshi Nagai, Shingo Masui, Tomoya Yanamoto, Shin-ichi Nagahama

Proceedings Volume 12421, 124210F (2023) https://doi.org/10.1117/12.2645282

KEYWORDS: Semiconductor lasers, Gallium nitride, Metalorganic chemical vapor deposition, High power lasers, Light sources

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Proceedings Article | 5 March 2022 Presentation + Paper

Edge-emitting blue laser diode with high CW wall-plug efficiency of 50 %

Yoshitaka Nakatsu, Yoji Nagao, Tsuyoshi Hirao, Kazuma Kozuru, Tatsuya Kanazawa, Shingo Masui, Eiichiro Okahisa, Tomoya Yanamoto, Shin-ichi Nagahama

Proceedings Volume 12001, 1200109 (2022) https://doi.org/10.1117/12.2601154

KEYWORDS: Semiconductor lasers, Continuous wave operation, Light sources and illumination, Fiber optics, High power lasers, Metalorganic chemical vapor deposition, Laser development, Projection systems, Light sources, Gallium nitride

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Proceedings Article | 4 March 2022 Presentation + Paper

Hybrid laser system with blue laser and near-infrared fiber laser for copper welding

Masaya Nakazumi, Atsushi Oguri, Yuta Ishige, Ryotaro Konishi, Tsuyoshi Hirao, Takagi Takeshi, Nobuyasu Matsumoto, Naoki Hayamizu, Hajime Mori, Masamitsu Kaneko, Naoki Tsukiji

Proceedings Volume 11983, 119830J (2022) https://doi.org/10.1117/12.2607449

KEYWORDS: Fiber lasers, Copper, Laser processing, Laser welding, Laser systems engineering, Semiconductor lasers

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Proceedings Article | 5 March 2021 Presentation + Paper

Blue laser-assisted kW-class CW NIR fiber laser system for high-quality copper welding

Yuta Ishige, Hiroshi Hashimoto, Naoki Hayamizu, Nobuyasu Matsumoto, Fumika Nishino, Masamitsu Kaneko, Hideyuki Nasu, Gábor Gajdátsy, András Cserteg, Kornél Jahn, Tsuyoshi Hirao, Hidenori Matsuo, Ryotaro Konishi

Proceedings Volume 11668, 116680M (2021) https://doi.org/10.1117/12.2574568

KEYWORDS: Fiber lasers, Laser welding, Copper, Near infrared, Continuous wave operation, Metals, Laser processing

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Proceedings Article | 16 February 2020 Paper

Blue and green InGaN semiconductor lasers as light sources for displays

Yoshitaka Nakatsu, Yoji Nagao, Tsuyoshi Hirao, Yoshihiro Hara, Shingo Masui, Tomoya Yanamoto, Shin-ichi Nagahama

Proceedings Volume 11280, 112800S (2020) https://doi.org/10.1117/12.2541710

KEYWORDS: Continuous wave operation, Light sources, Semiconductor lasers, High power lasers, Indium gallium nitride, Metalorganic chemical vapor deposition, Gallium nitride, Projection systems, Electrodes, Reliability, Group III-V semiconductors, Edge emitting semiconductor lasers

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Proceedings Article | 1 March 2019 Paper

High-efficiency blue and green laser diodes for laser displays

Yoshitaka Nakatsu, Yoji Nagao, Kazuma Kozuru, Tsuyoshi Hirao, Eiichiro Okahisa, Shingo Masui, Tomoya Yanamoto, Shin-ichi Nagahama

Proceedings Volume 10918, 109181D (2019) https://doi.org/10.1117/12.2505309

KEYWORDS: Light sources, Semiconductor lasers, Laser based displays, Gallium nitride, High power lasers, Metalorganic chemical vapor deposition, Indium gallium nitride

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Showing 5 of 7 publications

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