Issued Patents 2004
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819482 | Optical amplifier and optical communication system including the same | Masakazu Shigehara | 2004-11-16 |
| 6813065 | Raman amplifier and optical communication system | Tetsufumi Tsuzaki, Shinji Ishikawa, Masashi Onishi | 2004-11-02 |
| 6806999 | Raman amplification pumping module, Raman amplifier, and optical communication system | Tetsufumi Tsuzaki, Masayuki Nishimura | 2004-10-19 |
| 6804046 | Optical amplification fiber, fiber optic amplifier, and optical communication system | Masahiro Takagi | 2004-10-12 |
| 6791744 | Raman amplification optical fiber, optical fiber coil, raman amplifier, and optical communication system | Eisuke Sasaoka, Masashi Onishi, Toshiki Tanaka, Takao Naito | 2004-09-14 |
| 6778322 | Four-wave mixing suppression in Raman amplifiers | Masaaki Hirano | 2004-08-17 |
| 6771415 | Optical fiber for optical amplifier and fiber optic amplifier | Shinji Endo, Shinji Ishikawa | 2004-08-03 |
| 6724527 | Optical amplifier and optical transmission system using same | Shinji Endo | 2004-04-20 |
| 6687433 | WDM optical communication system | Toshiaki Okuno | 2004-02-03 |
| 6687439 | Light-amplifying optical fiber and method of making the same | Shinji Endo, Shinji Ishikawa, Toshimi Suzuki | 2004-02-03 |