Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7095553 | Optical amplifier and controlling method for Raman amplifier | — | 2006-08-22 |
| 7072100 | Optical amplifier and gain tilt compensation method | Masato Nishihara, Yasushi Sugaya | 2006-07-04 |
| 7061669 | Optical apparatus with loss compensation capability and optical amplifier for loss compensation | Hisao Nakashima, Miki Onaka, Masato Nishihara, Hideyuki Miyata | 2006-06-13 |
| 7042636 | Optical amplifier with pump light source control for Raman amplification | Tomoto Tanaka, Yasushi Sugaya, Miki Onaka | 2006-05-09 |
| 6891662 | Optical amplifier and method for amplifying wavelength multiplexed transmission signal light | Yasushi Sugaya, Terumi Chikama, Sinya Inagaki, Norifumi Shukunami | 2005-05-10 |
| 6891661 | Optical amplifier with pump light source control for Raman amplification | Tomoto Tanaka, Yasushi Sugaya, Miki Onaka | 2005-05-10 |
| 6873455 | Optical amplification apparatus utilizing raman amplification and controlling method thereof | Yasushi Sugaya, Tomoto Tanaka | 2005-03-29 |
| 6862133 | Raman amplifier and wavelength division multiplexing optical communication system, and method of controlling raman amplification | Miki Onaka, Yasushi Sugaya | 2005-03-01 |
| 6847478 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Miki Onaka, Yasushi Sugaya | 2005-01-25 |
| 6823107 | Method and device for optical amplification | Shinichirou Muro, Yasushi Sugaya | 2004-11-23 |
| 6747790 | Optical amplifier for amplifying multi-wavelength light | Miki Onaka, Yasushi Sugaya, Norifumi Shukunami, Manabu Watanabe | 2004-06-08 |
| 6741390 | Variable wavelength light source apparatus and optical amplifier using same | Miki Onaka, Hiroshi Onaka | 2004-05-25 |
| 6738184 | Optical amplifier for amplifying multi-wavelength light | Yasushi Sugaya, Yoshihito Onoda, Keiko Sasaki | 2004-05-18 |
| 6683712 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Miki Onaka, Yasushi Sugaya | 2004-01-27 |
| 6624926 | Optical amplifier with pump light source control for raman amplification | Tomoto Tanaka, Yasushi Sugaya, Miki Onaka | 2003-09-23 |
| 6577437 | Optical amplification apparatus utilizing Raman amplification and controlling method thereof | Yasushi Sugaya, Tomoto Tanaka | 2003-06-10 |
| 6510000 | Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights | Miki Onaka, Tomoto Tanaka, Yasushi Sugaya, Susumu Kinoshita | 2003-01-21 |
| 6441951 | Optical amplification apparatus using Raman amplification | Tomoto Tanaka, Miki Onaka, Yasushi Sugaya | 2002-08-27 |
| 6388801 | Optical amplification apparatus utilizing Raman amplification and controlling method thereof | Yasushi Sugaya, Tomoto Tanaka | 2002-05-14 |
| 5856882 | Optical fibers and optical fiber amplifiers | Hiroaki Yanagita, Katsuhisa Itoh, Hisayoshi Toratani | 1999-01-05 |