Dr. Tomoharu Hasegawa Profile

Dr. Tomoharu Hasegawa

at AGC Inc

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 16 May 2008 Paper

Bi2O3-based erbium doped fiber laser with over 110 nm tunable range for fiber sensor sources

S. Ohara, T. Hasegawa, Y. Kondo, N. Sugimoto

Proceedings Volume 7004, 70041Q (2008) https://doi.org/10.1117/12.785822

KEYWORDS: Fiber lasers, Erbium, Fiber optics sensors, Tunable lasers, Sensors, Optical fibers, Light sources, Fiber Bragg gratings, Multiplexing, Tunable filters

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Proceedings Article | 10 September 2007 Paper

Novel high nonlinear bismuth-based photonic crystal fiber

Tomoharu Hasegawa, Tatsuo Nagashima, Seiki Ohara, Naoki Sugimoto

Proceedings Volume 6775, 677509 (2007) https://doi.org/10.1117/12.733341

KEYWORDS: Dispersion, Glasses, Photonic crystal fibers, Refractive index, Optical fibers, Scanning probe microscopy, Nonlinear optical glasses, Bismuth, Fusion splicing, Nonlinear crystals

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Proceedings Article | 14 June 2004 Paper

Bi2O3-based highly nonlinear fiber with step index structure

Tatsuo Nagashima, Tomoharu Hasegawa, Seiki Ohara, Naoki Sugimoto, Kenji Taira, Kazuro Kikuchi

Proceedings Volume 5350, (2004) https://doi.org/10.1117/12.530639

KEYWORDS: Glasses, Refractive index, Bismuth, Structured optical fibers, Optical components, Optical fibers, Time division multiplexing, Oxides, Single mode fibers, Cladding

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