Issued Patents All Time
Showing 51–75 of 95 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6922280 | Optical amplifying apparatus, optical add/drop multiplexer, and optical amplifying method | — | 2005-07-26 |
| 6891662 | Optical amplifier and method for amplifying wavelength multiplexed transmission signal light | Etsuko Hayashi, Terumi Chikama, Sinya Inagaki, Norifumi Shukunami | 2005-05-10 |
| 6891661 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Tomoto Tanaka, Miki Onaka | 2005-05-10 |
| 6891663 | Optical amplifier for amplifying a wavelength division multiplexed (WDM) light including light in different wavelength bands | Susumu Kinoshita | 2005-05-10 |
| 6873795 | Apparatus for detecting peaks of wavelength-division-multiplexed light, and apparatus for controlling said light | — | 2005-03-29 |
| 6873455 | Optical amplification apparatus utilizing raman amplification and controlling method thereof | Tomoto Tanaka, Etsuko Hayashi | 2005-03-29 |
| 6865016 | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied | Susumu Kinoshita | 2005-03-08 |
| 6862133 | Raman amplifier and wavelength division multiplexing optical communication system, and method of controlling raman amplification | Miki Onaka, Etsuko Hayashi | 2005-03-01 |
| 6847478 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Miki Onaka, Etsuko Hayashi | 2005-01-25 |
| 6823107 | Method and device for optical amplification | Shinichirou Muro, Etsuko Hayashi | 2004-11-23 |
| 6768578 | Optical amplifier for amplifying a wavelength division multiplexed (WDM) light including light in different wavelength bands | Susumu Kinoshita | 2004-07-27 |
| 6747790 | Optical amplifier for amplifying multi-wavelength light | Miki Onaka, Etsuko Hayashi, Norifumi Shukunami, Manabu Watanabe | 2004-06-08 |
| 6738184 | Optical amplifier for amplifying multi-wavelength light | Etsuko Hayashi, Yoshihito Onoda, Keiko Sasaki | 2004-05-18 |
| 6738182 | Optical fiber amplifier | Shinya Inagaki, Norifumi Shukunami, Manabu Watanabe, Hisashi Takamatsu, Keiko Sasaki +3 more | 2004-05-18 |
| 6683712 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Miki Onaka, Etsuko Hayashi | 2004-01-27 |
| 6646791 | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied | Susumu Kinoshita | 2003-11-11 |
| 6624926 | Optical amplifier with pump light source control for raman amplification | Etsuko Hayashi, Tomoto Tanaka, Miki Onaka | 2003-09-23 |
| 6577437 | Optical amplification apparatus utilizing Raman amplification and controlling method thereof | Tomoto Tanaka, Etsuko Hayashi | 2003-06-10 |
| 6510000 | Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights | Miki Onaka, Tomoto Tanaka, Etsuko Hayashi, Susumu Kinoshita | 2003-01-21 |
| 6507431 | Remotely pumping type multi-wavelength light transmission system | Terumi Chikama | 2003-01-14 |
| 6496300 | Optical amplifier | Susumu Kinoshita, Miki Onaka, Chihiro Ohshima, Terumi Chikama, Hiroyuki Itou +2 more | 2002-12-17 |
| 6483636 | Optical amplifier | Hiroaki Tomofuji, Rikiya Watanabe | 2002-11-19 |
| 6480329 | Multi-wavelength light amplifier | Miki Takeda, Susumu Kinoshita, Terumi Chikama | 2002-11-12 |
| 6462861 | Optical amplifying apparatus and optical communication system | Chihiro Ohshima | 2002-10-08 |
| 6441951 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Miki Onaka, Etsuko Hayashi | 2002-08-27 |