Takayuki Matsuyama
Toshiba
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Publication
Featured researches published by Takayuki Matsuyama.
IEEE Journal of Quantum Electronics | 1991
Junichi Kinoshita; Kazuaki Ohtsuka; Hiroyuki Agatsuma; Akira Tanaka; Takayuki Matsuyama; Akio Makuta; Hirofumi Kobayashi
The performance of distributed feedback (DFB) lasers with a narrow region in the middle of the waveguiding strip and antireflective(AR)-coated facet ends is presented. The narrow region is designed to act as a three-quarter wavelength phase shift. Single longitudinal mode (SLM) capability is discussed both theoretically and experimentally. Calculated results predict the shift region is effective in relaxing axial hole burning because of a dip at the center of the axial field profile and a smaller optical confinement factor in the region. Experimentally, stable SLM operation up to more than 50 mW, a sidemode suppression ratio of more than 40 dB, and 3 dB modulation bandwidth over 10 GHz are achieved. >
IEEE Photonics Technology Letters | 1990
Takayuki Matsuyama; Akio Makuta; Akira Tanaka; Kazuaki Ohtsuka; Hiroyuki Agatsuma; Junichi Kinoshita
The TM-mode suppressibility of DFB lasers with a narrow stripe region is investigated. A waveguide is designed to produce different phase shifts between the TE and TM modes. A threshold gain difference between the TE and TM modes is introduced by a phase shift difference of both modes. A TM and side mode suppression ratio of more than 40 dB is obtained under 1.8-Gb/s NRZ pseudorandom pulse modulation.<<ETX>>
Archive | 1991
Takayuki Matsuyama
Archive | 2006
Takayuki Matsuyama; Masaaki Onomura
Archive | 2002
Takayuki Matsuyama
Archive | 1996
Takayuki Matsuyama; Chisato Furukawa
Archive | 2006
Akira Tanaka; Masaaki Onomura; Seiji Iida; Takayuki Matsuyama
Archive | 1995
Chisato Furukawa; Takayuki Matsuyama
Archive | 2002
Takayuki Matsuyama; Masaki Tohyama
Archive | 2002
Takayuki Matsuyama
