Issued Patents All Time
Showing 51–66 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7046431 | Light amplifier and light amplifying method | Yasushi Sugaya | 2006-05-16 |
| 7042636 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Tomoto Tanaka, Yasushi Sugaya | 2006-05-09 |
| 6922282 | Optical amplifier for amplifying multi-wavelength light | Yasushi Sugaya | 2005-07-26 |
| 6891661 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Tomoto Tanaka, Yasushi Sugaya | 2005-05-10 |
| 6862133 | Raman amplifier and wavelength division multiplexing optical communication system, and method of controlling raman amplification | Yasushi Sugaya, Etsuko Hayashi | 2005-03-01 |
| 6847478 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Etsuko Hayashi, Yasushi Sugaya | 2005-01-25 |
| 6785042 | Slope control of gain wavelength of raman amplification | Susumu Kinoshita | 2004-08-31 |
| 6747790 | Optical amplifier for amplifying multi-wavelength light | Yasushi Sugaya, Etsuko Hayashi, Norifumi Shukunami, Manabu Watanabe | 2004-06-08 |
| 6741390 | Variable wavelength light source apparatus and optical amplifier using same | Etsuko Hayashi, Hiroshi Onaka | 2004-05-25 |
| 6724526 | Inter-wavelength light power deviation monitoring method and optical equalizer and optical amplifier utilizing the method | Susumu Kinoshita | 2004-04-20 |
| 6683712 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Etsuko Hayashi, Yasushi Sugaya | 2004-01-27 |
| 6624926 | Optical amplifier with pump light source control for raman amplification | Etsuko Hayashi, Tomoto Tanaka, Yasushi Sugaya | 2003-09-23 |
| 6510000 | Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights | Tomoto Tanaka, Etsuko Hayashi, Yasushi Sugaya, Susumu Kinoshita | 2003-01-21 |
| 6496300 | Optical amplifier | Susumu Kinoshita, Yasushi Sugaya, Chihiro Ohshima, Terumi Chikama, Hiroyuki Itou +2 more | 2002-12-17 |
| 6441951 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Etsuko Hayashi, Yasushi Sugaya | 2002-08-27 |
| 6359726 | Wavelength division multiplexing optical amplifier with function of gain-equalizing and optical communication system | Susumu Kinoshita | 2002-03-19 |