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Dive into the research topics where Hiroyuki Yokoyama is active.

Publication


Featured researches published by Hiroyuki Yokoyama.


Nonlinear Optics: Materials, Fundamentals and Applications (2007), paper MD4 | 2007

Extreme Nonlinear Phase Shift in Self-Pulsating Laser Diodes

Makoto Ohta; Masaru Kuramoto; Masao Ikeda; Hiroyuki Yokoyama

We observed strong self-phase-modulation of over 20π inside self-pulsating laser diodes. We found that this phenomenon plays a crucial role in reducing noise when using a semiconductor laser to read information from an optical disk.


International Conference on Ultrafast Phenomena (2010), paper ME27 | 2010

Generation and Amplification of 400 nm Band Picosecond Optical Pulses by GaInN Laser Diodes

Rintaro Koda; Tomoyuki Oki; Takao Miyajima; Hideki Watanabe; Masaru Kuramoto; Masao Ikeda; Hiroyuki Yokoyama

We demonstrate the generation of 20W peak power, 3ps optical pulses using a combination of a GaInN-based, mode-locked laser diode and an optical amplifier. A strong nonlinear phase shift over 4π has also been observed.


Archive | 2007

Semiconductor laser, bio-imaging system, microscope, optical disk device, optical pickup, processing machine, and endoscope

Masaru Kuramoto; Hiroyuki Yokoyama; 大 倉本; 弘之 横山


Archive | 2012

BI-SECTION SEMICONDUCTOR LASER DEVICE, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR DRIVING THE SAME

Hideki Watanabe; Takao Miyajima; Masao Ikeda; Hiroyuki Yokoyama; Tomoyuki Oki; Masaru Kuramoto


Archive | 2011

Method of driving a laser diode

Hiroyuki Yokoyama; Shunsuke Kono; Tomoyuki Oki; Masao Ikeda; Takao Miyajima; Hideki Watanabe


Archive | 2011

Laser diode assembly and semiconductor optical amplifier assembly

Hiroyuki Yokoyama; Shunsuke Kono; Masaru Kuramoto


Archive | 2011

Laser diode assembly

Shunsuke Kono; Hiroyuki Yokoyama; Masaru Kuramoto; Tomoyuki Oki


Archive | 2011

Self-oscillating semiconductor laser device and driving method thereof

Hideki Watanabe; Masaru Kuramoto; Takao Miyajima; Hiroyuki Yokoyama


Archive | 2009

Laser diode, optical disk device and optical pickup

Makoto Oota; Hiroyuki Yokoyama; Masaru Kuramoto; Masao Ikeda


Archive | 2012

LASER DIODE ELEMENT ASSEMBLY AND METHOD OF DRIVING THE SAME

Tomoyuki Oki; Masaru Kuramoto; Rintaro Koda; Hideki Watanabe; Hiroyuki Yokoyama

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Kentaro Nakamura

Tokyo Institute of Technology

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Masahiro Yoshita

National Institute of Advanced Industrial Science and Technology

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