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Dive into the research topics where Koichi Harada is active.

Publication


Featured researches published by Koichi Harada.


optical fiber communication conference | 2002

New medium-dispersion fiber with large effective area and low dispersion slope

Shoichiro Matsuo; Shoji Tanigawa; Kuniharu Himeno; Koichi Harada

We designed and fabricated MDF with a dualring index profile. The fiber realized a large effective area of approximately 100 /spl mu/m/sup 2/, small dispersion slope of 0.065 ps/nm/sup 2//km, low attenuation of 0.212 dB/km. The splice loss between the fiber and a SM fiber was 0.12 dB. Consequently, the MDF is suitable for high bit rate and long haul systems over S-, C-, L- bands.


Archive | 2005

Method for compensating modal dispersion in multimode optical fiber transmission path

Ning Guan; Shinji Habu; Katsuhiro Takenaga; Kuniharu Himeno; Koichi Harada


Archive | 2003

Optical fiber polarization mode dispersion measurement method and measurement device

Shoji Tanigawa; Tomoharu Sagawa; Masataka Ikeda; Shoichiro Matsuo; Kuniharu Himeno; Koichi Harada


Archive | 2002

Optical fiber, optical fiber preform, and method for manufacturing optical fiber preform

Shoichiro Matsuo; Shoji Tanigawa; Kuniharu Himeno; Koichi Harada


Archive | 2005

Method for measuring a differential mode delay of a multimode optical fiber

Katsuhiro Takenaga; Ning Guan; Shoichiro Matsuo; Kuniharu Himeno; Koichi Harada


Archive | 2004

DISPERSION-COMPENSATING OPTICAL FIBER AND HYBRID TRANSMISSION LINE

Kazuhiko Aikawa; Manabu Saitou; Takaaki Suzuki; Shoichiro Matsuo; Takashi Suzuki; Koichi Harada; Akira Wada


Archive | 2004

Higher order mode dispersion compensating fiber and mode converter for higher order fiber

Ning Guan; Kazuhiko Aikawa; Masashi Ikeda; Kuniharu Himeno; Koichi Harada


Archive | 2002

Single Mode Optical Fiber and Manufacturing Method Therefor

Tomohiro Nunome; Hiroshi Kutami; Manabu Saitou; Kenji Okada; Munehisa Fujimaki; Koichi Harada


Archive | 2001

Structure and method of splicing optical fiber

Koichi Harada; Kuniharu Himeno; Shoichiro Matsuo; Katsuhiro Takenaga; 光一 原田; 邦治 姫野; 昌一郎 松尾; 勝宏 竹永


Archive | 2002

Method and apparatus for manufacturing porous base material

Munehisa Fujimaki; Takakazu Goto; Koichi Harada; Masahiro Horikoshi; Hiroshi Kuami; Tomohiro Nunome; Keisuke Uchiyama; 圭祐 内山; 光一 原田; 雅博 堀越; 智宏 布目; 孝和 後藤; 寛 朽網; 宗久 藤巻

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