Dr. Hiroyuki Yokoyama Profile

Dr. Hiroyuki Yokoyama

at Tohoku Univ

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 23 February 2018 Paper

Improvement of two-photon microscopic imaging in deep regions of living mouse brains by utilizing a light source based on an electrically controllable gain-switched laser diode

Kazuaki Sawada, Ryosuke Kawakami, Yi-Cheng Fang, Jui-Hung Hung, Yuichi Kozawa, Kohei Otomo, Shunichi Sato, Hiroyuki Yokoyama, Tomomi Nemoto

Proceedings Volume 10498, 104982L (2018) https://doi.org/10.1117/12.2288664

KEYWORDS: Brain, Neuroimaging, Two photon excitation microscopy, Neurons, Two photon imaging, In vivo imaging, Second-harmonic generation, Light sources, Tissues, Semiconductor lasers

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Proceedings Article | 14 March 2016 Presentation + Paper

Synchronized and timing-stabilized pulse generation from a gain-switched laser diode for stimulated Raman scattering microscopy

Kyoya Tokunaga, Yi-Cheng Fang, Hiroyuki Yokoyama, Yasuyuki Ozeki

Proceedings Volume 9712, 97120N (2016) https://doi.org/10.1117/12.2213807

KEYWORDS: Microscopy, Semiconductor lasers, Raman scattering, Picosecond phenomena, Laser sources, Raman spectroscopy, Biomedical optics, Light sources, Spectroscopy, Sapphire lasers, Solid state lasers, Multiphoton microscopy, Fiber amplifiers, Bandpass filters

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Proceedings Article | 17 February 2011 Paper

High peak power picoseconds optical pulse generation from GaInN semiconductor diode lasers

Rintaro Koda, Tomoyuki Oki, Takao Miyajima, Hideki Watanabe, Shunsuke Kono, Masaru Kuramoto, Masao Ikeda, Hiroyuki Yokoyama

Proceedings Volume 7953, 79530J (2011) https://doi.org/10.1117/12.877030

KEYWORDS: Semiconductor lasers, Mode locking, Picosecond phenomena, Oscillators, 3D optical data storage, Semiconductor optical amplifiers, Optical storage, Absorption, Data storage, Waveguides

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Proceedings Article | 15 February 2008 Paper

Two-photon bioimaging with a multi-kilowatt peak-power optical pulse source using a 1-micron wavelength mode-locked semiconductor laser

Hengchang Guo, Keijiro Takashima, Aya Sato, Hiroyuki Yokoyama, Masahito Mure, Yuji Iseki, Hiroshi Tsubokawa

Proceedings Volume 6860, 686020 (2008) https://doi.org/10.1117/12.762922

KEYWORDS: Picosecond phenomena, Neurons, Semiconductor lasers, Green fluorescent protein, Mode locking, Brain, Second-harmonic generation, Fiber amplifiers, Light sources, Luminescence

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SPIE Journal Paper | 1 September 2007 Open Access

Two-photon bioimaging utilizing supercontinuum light generated by a high-peak-power picosecond semiconductor laser source

Hiroyuki Yokoyama, Hiroshi Tsubokawa, Hengchang Guo, Junichi Shikata, Ki-ichi Sato, Keijiro Takashima, Kaori Kashiwagi, Naoaki Saito, Hirokazu Taniguchi, Hiromasa Ito

JBO, Vol. 12, Issue 05, 054019, (September 2007) https://doi.org/10.1117/12.10.1117/1.2800393

KEYWORDS: Light, Green fluorescent protein, Luminescence, Semiconductor lasers, Picosecond phenomena, Fiber amplifiers, Optical amplifiers, Light sources, Second-harmonic generation, Neurons

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Proceedings Article | 7 November 2005 Paper

Analysis of THz-wave difference-frequency generation in two-dimensional domain-inverted structure

Yu. Avetisyan, A. Hakhoumian, Y. Sasaki, H. Yokoyama, H. Ito

Proceedings Volume 5989, 59891I (2005) https://doi.org/10.1117/12.630389

KEYWORDS: Terahertz radiation, Crystals, Wave propagation, Nonlinear crystals, Absorption, Lithium niobate, Laser crystals, Antennas, Semiconductor lasers, Continuous wave operation

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Showing 5 of 6 publications

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