Issued Patents All Time
Showing 26–50 of 75 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7466920 | Chromatic dispersion compensating apparatus | Hiroki Ooi, Takashi Iwabuchi, Junichi Kumasako, George Ishikawa, Tomoo Takahara | 2008-12-16 |
| 7437074 | Wavelength division multiplexing transmission system | Kentaro Nakamura | 2008-10-14 |
| 7415182 | Optical fiber cable | Rainer Hainberger, Takeshi Hoshida | 2008-08-19 |
| 7382979 | Wavelength dispersion compensation design method and a system thereof | Yuichi Akiyama, Takeshi Hoshida, Hisao Nakashima | 2008-06-03 |
| 7372622 | Optical transmission system, optical repeater, and optical transmission method | Kentaro Nakamura, Rainer Hainberger, Junichi Kumasako | 2008-05-13 |
| 7336870 | Optical transmission system | Hiroki Ooi, Akira Miura, Ichiro Nakajima | 2008-02-26 |
| 7307782 | Raman amplifier and optical communication system including the same | Tetsufumi Tsuzaki, Motoki Kakui, Junichi Kumasako | 2007-12-11 |
| 7233742 | Optical communication system, method for supplying pump light, and distributed Raman amplifying apparatus | Takeshi Hoshida | 2007-06-19 |
| 7099541 | Optical fiber cable | Rainer Hainberger, Takeshi Hoshida | 2006-08-29 |
| 7075709 | Optical transmission system, optical repeater, and optical transmission method | Kentaro Nakamura, Rainer Hainberger, Junichi Kumasako | 2006-07-11 |
| 7054060 | Raman amplification system utilizing bi-directional pumping | Rainer Hainberger | 2006-05-30 |
| 7030973 | Polarization mode dispersion compensator based on degree of polarization | Jens Rasmussen, George Ishikawa, Hiroki Ooi | 2006-04-18 |
| 6941074 | Bidirectionally transmittable optical wavelength division multiplexed transmission system | Kentaro Nakamura, Junichi Kumasako, Rainer Hainberger | 2005-09-06 |
| 6934454 | Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable | Rainer Hainberger, Takeshi Hoshida | 2005-08-23 |
| 6885499 | Optical amplifying apparatus for amplifying wide-wavelength-band light, optical sending apparatus, optical transmission system, and optical amplifying method | Takeshi Hoshida | 2005-04-26 |
| 6862134 | Distributed optical amplifier, amplifying method, and optical communication system | Takeshi Hoshida | 2005-03-01 |
| 6856453 | Control scheme for long wavelength channels in wideband WDM optical fiber transmission system | Rainer Hainberger | 2005-02-15 |
| 6829083 | Method for gain equalization, and device and system for use in carrying out the method | — | 2004-12-07 |
| 6816683 | Wavelength division multiplexing communications network supervisory system | Takeo Osaka, Shin-ichirou Harasawa | 2004-11-09 |
| 6807376 | Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier | Naomasa Shimojoh, Terumi Chikama | 2004-10-19 |
| 6741389 | Optical transmission system and optical transmission method utilizing Raman amplification | Junichi Kumasako | 2004-05-25 |
| 6721481 | Distributed optical fiber amplifier using fiber with specific characteristic values | Rainer Hainberger, Takeshi Hoshida | 2004-04-13 |
| 6717730 | Tunable optical filter | Nobuhiro Fukushima | 2004-04-06 |
| 6693739 | Method for gain equalization, and device and system for use in carrying out the method | — | 2004-02-17 |
| 6654561 | Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method and optical communication system each utilizing the method | Takeshi Sakamoto, Hiroaki Tomofuji, Motoyoshi Sekiya, Makoto Murakami, Kazuo Yamane +1 more | 2003-11-25 |