Issued Patents All Time
Showing 76–100 of 130 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6975447 | Optical fiber amplifier and dispersion compensating fiber module for optical fiber amplifier | — | 2005-12-13 |
| 6943940 | Optical amplifier for amplifying a wavelength division multiplexed (WDM) light including light in different wavelength bands | Yasushi Sugaya | 2005-09-13 |
| 6897396 | Switch gear and method of manufacturing thereof | Yoshihiro Ito, Satoshi Makishima, Hiroki Sekiya, Masaru Miyagawa, Toshio Shimizu | 2005-05-24 |
| 6891663 | Optical amplifier for amplifying a wavelength division multiplexed (WDM) light including light in different wavelength bands | Yasushi Sugaya | 2005-05-10 |
| 6879434 | Distributed raman amplifier for optical network and method | Yasuhiko Aoki | 2005-04-12 |
| 6873457 | Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method | Terumi Chikama | 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 | Yasushi Sugaya | 2005-03-08 |
| 6842562 | Optical add/drop node and method | Koji Takeguchi | 2005-01-11 |
| 6785042 | Slope control of gain wavelength of raman amplification | Miki Onaka | 2004-08-31 |
| 6768578 | Optical amplifier for amplifying a wavelength division multiplexed (WDM) light including light in different wavelength bands | Yasushi Sugaya | 2004-07-27 |
| 6747788 | Optical fiber amplifier and dispersion compensating fiber module for optical fiber amplifier | — | 2004-06-08 |
| 6724526 | Inter-wavelength light power deviation monitoring method and optical equalizer and optical amplifier utilizing the method | Miki Onaka | 2004-04-20 |
| 6690508 | Control system and method for an optical amplifier | Cechan Tian, Joseph R. Rodriguez | 2004-02-10 |
| 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 | Yasushi Sugaya | 2003-11-11 |
| 6633429 | Optical amplification method and device usable with bands other than the C-band | Shinya Inagaki | 2003-10-14 |
| 6631026 | Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method | Terumi Chikama | 2003-10-07 |
| 6603596 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Norifumi Shukunami, Hiroyuki Itou, Taiki Kobayashi | 2003-08-05 |
| 6580549 | Wavelength-multiplexed light amplifying apparatus, optical amplifier and optical add-and-drop apparatus using wavelength-multiplexed light amplifying basic unit | — | 2003-06-17 |
| 6542291 | Optical amplifier excitation light source control method for use in optical amplifier and optical amplifier control method | Terumi Chikama | 2003-04-01 |
| 6529314 | Method and apparatus using four wave mixing for optical wavelength conversion | Norifumi Shukunami, Toshio Hashi | 2003-03-04 |
| 6510000 | Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights | Miki Onaka, Tomoto Tanaka, Etsuko Hayashi, Yasushi Sugaya | 2003-01-21 |
| 6496300 | Optical amplifier | Miki Onaka, Yasushi Sugaya, Chihiro Ohshima, Terumi Chikama, Hiroyuki Itou +2 more | 2002-12-17 |
| 6480329 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2002-11-12 |
| 6462862 | Optical fiber amplifier and dispersion compensating fiber module for optical fiber amplifier | — | 2002-10-08 |
| 6452719 | Optical communication system and optical amplifier | — | 2002-09-17 |