Journal of optical communications | 1992
Yahei Koyamada; Hiroshi Nakamoto; Norihisa Ohta
The performance of an optical time domain reflectometer (OTDR) is significantly improved by using a coherent detection technique and a fiber amplification technique. Theoretical and experimental studies are presented on the coherent OTDR enhanced with erbium-doped fiber amplifiers (EDFAs). The most effective use of the EDFAs in the coherent OTDR is as post-amplifiers. The single way dynamic range (SWDR) has been increased by 13 dB at 1.55 urn over that of a standard OTDR, using a DFB laser diode, laser diode pumped EDFAs and a coherent detector, all suited for integration into a robust and portable instrument. There is still the possibility of further improvement, which could increase the SWDR to 45 dB with a spatial resolution of 100 m.
Archive | 2009
Hiroshi Nakamoto; Hiroyuki Nakamura; Daiki Shibayama; Hideyuki Tsuboi; 博司 中本; 宏之 中村; 秀幸 坪井; 大樹 柴山
Archive | 2008
Junichi Iwatani; Hiroshi Nakamoto; Hiroyuki Nakamura; 博司 中本; 宏之 中村; 純一 岩谷
Archive | 2006
Hiroshi Nakamoto; Mitsuru Nishino; Shiyuuta Ueno; Yoshiyuki Yasui; 衆太 上野; 博司 中本; 由幸 安井; 満 西野
Archive | 2010
Atsuya Ando; Hiroshi Nakamoto; Hiroyuki Nakamura; Daiki Shibayama; Hideyuki Tsuboi; 博司 中本; 宏之 中村; 秀幸 坪井; 篤也 安藤; 大樹 柴山
Archive | 2006
Hiroshi Nakamoto; Mitsuru Nishino; Yoshiyuki Yasui; Hirotaka Yoshioka; 博司 中本; 弘貴 吉岡; 由幸 安井; 満 西野
Electronics and Communications in Japan Part I-communications | 2005
Kazushi Tahara; Yoshinori Rokugo; Hiroshi Nakamoto; Takeo Matsuura; Joji Maeda; Susumu Itoh
Archive | 2002
Takeo Matsuura; Hiroshi Nakamoto; Yoshinori Rokugo; Ichiji Tawara; 博司 中本; 義典 六郷; 健夫 松浦; 一司 田原
Electronics and Communications in Japan Part I-communications | 1992
Hiroshi Nakamoto; Norihisa Ohta; Yahei Koyamada
Archive | 2008
Hiroshi Nakamoto; Hiroyuki Nakamura; Hideyuki Tsuboi; 博司 中本; 宏之 中村; 秀幸 坪井
