Issued Patents All Time
Showing 26–50 of 95 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7606488 | Wavelength-division-multiplexing optical transmission system and control method thereof | — | 2009-10-20 |
| 7529022 | Raman amplifier and wavelength division multiplexing optical communication system, and method of controlling raman amplification | Miki Onaka, Etsuko Hayashi | 2009-05-05 |
| 7522839 | Method of upgrading optical node, and an optical node apparatus | Miki Onaka, Takahumi Terahara, Satoru Okano, Takehiro Fujita, Hiroaki Tomofuji +1 more | 2009-04-21 |
| 7505197 | Optical amplifier provided with control function of pumping light, and optical transmission system using the same | Etsuko Hayashi, Masato Nishihara, Shinichirou Muro | 2009-03-17 |
| 7477447 | 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 | 2009-01-13 |
| 7474459 | Multi-wavelength light amplifier | Miki Takeda, Susumu Kinoshita, Terumi Chikama | 2009-01-06 |
| 7453628 | Optical amplifier having wide dynamic range | Miki Onaka | 2008-11-18 |
| 7417791 | Optical amplifier for amplifying multi-wavelength light | Miki Onaka, Etsuko Hayashi, Norifumi Shukunami, Manabu Watanabe | 2008-08-26 |
| 7400441 | Optical amplifier, optical amplification repeater and pump light supply control method | Shinichirou Muro, Etsuko Hayashi | 2008-07-15 |
| 7394589 | Optical amplifier for wide band Raman amplification of wavelength division multiplexed (WDM) signal lights | Miki Onaka, Tomoto Tanaka, Etsuko Hayashi, Susumu Kinoshita | 2008-07-01 |
| 7362499 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Tomoto Tanaka, Miki Onaka | 2008-04-22 |
| 7295780 | Apparatus for detecting peaks of wavelength-division-multiplexed light, and apparatus for controlling said light | — | 2007-11-13 |
| 7268936 | Optical amplifier having polarization mode dispersion compensation function | Miki Onaka, Etsuko Hayashi | 2007-09-11 |
| 7227681 | 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 | 2007-06-05 |
| 7224517 | Multi-wavelength light amplifier | Miki Takeda, Susumu Kinoshita, Terumi Chikama | 2007-05-29 |
| 7212333 | Optical node | — | 2007-05-01 |
| 7212335 | Apparatus and method for amplification medium performance simulation, and optical amplifier | Masato Nishihara, Etsuko Hayashi | 2007-05-01 |
| 7180654 | Raman amplifier | Shinichirou Muro, Etsuko Hayashi | 2007-02-20 |
| 7145718 | Control method of optical fiber amplifier and optical transmission system | Shinichirou Muro, Etsuko Hayashi | 2006-12-05 |
| 7072100 | Optical amplifier and gain tilt compensation method | Masato Nishihara, Etsuko Hayashi | 2006-07-04 |
| 7046431 | Light amplifier and light amplifying method | Miki Onaka | 2006-05-16 |
| 7042636 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Tomoto Tanaka, Miki Onaka | 2006-05-09 |
| 6999177 | Method and apparatus for measuring multi-path interference noise in optical amplifier | Shinichirou Muro | 2006-02-14 |
| 6943940 | Optical amplifier for amplifying a wavelength division multiplexed (WDM) light including light in different wavelength bands | Susumu Kinoshita | 2005-09-13 |
| 6922282 | Optical amplifier for amplifying multi-wavelength light | Miki Onaka | 2005-07-26 |