Mr. Takasi Simoyama Profile

Takasi Simoyama

at Fujitsu Labs Ltd

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 12 March 2024 Presentation + Paper

Waveguide-coupled germanium lateral uni-traveling-carrier photodetector for coherent applications at 130 Gbaud and beyond

Jianping Wang, Takasi Simoyama, Akira Oka, Mario Alberto Serrano-Núñez, Yoshihiko Yoshida, Kiyomasa Doi, Ayahito Uetake, Shuntaro Makino, Akira Ishii, Suguru Akiyama

Proceedings Volume 12891, 128910L (2024) https://doi.org/10.1117/12.3001629

KEYWORDS: Germanium, Waveguides, Photocurrent, Photodetectors, Dark current, Silicon, Optical coherence, Capacitance, Tolerancing, Silicon photonics, Integrated photonics

Read Abstract +

Proceedings Article | 9 February 2012 Paper

AlGaInAs semi-insulating buried-heterostructure distributed reflector lasers for low-driving-current high-speed direct modulation

Takasi Simoyama, Manabu Matsuda, Shigekazu Okumura, Ayahito Uetake, Mitsuru Ekawa, Tsuyoshi Yamamoto

Proceedings Volume 8277, 82770B (2012) https://doi.org/10.1117/12.906607

KEYWORDS: Modulation, Mirrors, Eye, Fiber lasers, Laser damage threshold, Semiconductor lasers, Laser sintering, Reflectors, Waveguides, Light sources

Read Abstract +

Proceedings Article | 25 July 2003 Paper

Ultrafast gain and index in semiconductor optical amplifier: theory and experiment

Harm Dorren, Xuelin Yang, Daan Lenstra, H. de Waardt, Giok-Djan Khoe, Takasi Simoyama, Hiroshi Ishikawa, Hitoshi Kawashima, Toshifumi Hasama

Proceedings Volume 4986, (2003) https://doi.org/10.1117/12.482319

KEYWORDS: Ultrafast phenomena, Phase shifts, Picosecond phenomena, Semiconductor optical amplifiers, Absorption, Switching, Optical amplifiers, Refractive index, Polarization, Attenuators

Read Abstract +

Proceedings Article | 30 May 2003 Paper

Realization of ultrafast and low-power all-optical switches using intersubband transitions in a novel InGaAs/AlAs/AlAsSb quantum well structure

Teruo Mozume, Jun-ichi Kasai, Nikolai Georgiev, Takasi Simoyama, Achanta Gopal, Haruhiko Yoshida

Proceedings Volume 4992, (2003) https://doi.org/10.1117/12.475706

KEYWORDS: Quantum wells, Absorption, Scattering, Interfaces, Indium gallium arsenide, Antimony, Picosecond phenomena, Gallium, Switching, Statistical analysis

Read Abstract +

Proceedings Article | 14 May 2002 Paper

Large intersubband nonlinearity for all-optical switching at 1.72 micron in Sb-based quantum wells

A. Gopal, Haruhiko Yoshida, Arup Neogi, Teruo Mozume, Nikolai Georgiev, Takasi Simoyama, Osamu Wada, Hiroshi Ishikawa

Proceedings Volume 4638, (2002) https://doi.org/10.1117/12.467468

KEYWORDS: Absorption, Quantum wells, Switching, Switches, Shape analysis, Nonlinear optics, Semiconductors, Excitons, Solids, Continuous wave operation

Read Abstract +

Proceedings Article | 9 July 2001 Paper

Wavelength conversion using four-wave mixing with two nondegenerated pumps in a wavelength-selectable laser

Takasi Simoyama, Haruhiko Kuwatsuka, Martin Bouda, Manabu Matsuda, Yuji Kotaki, Hiroshi Ishikawa

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432612

KEYWORDS: Terahertz radiation, Brain-machine interfaces, Four wave mixing, Waveguides, Switching, Quantum wells, Semiconductor lasers, Fiber lasers, Semiconductors, Hole burning spectroscopy

Read Abstract +

Showing 5 of 6 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years