Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9515450 | Amplifying optical fiber and optical amplifier | Shoichiro Matsuo, Katsuhiro Takenaga, Kentaro Ichii, Hirotaka Ono, Kyouzou Tsujikawa +1 more | 2016-12-06 |
| 9252556 | Amplifying optical fiber and optical amplifier | Shoichiro Matsuo, Katsuhiro Takenaga, Kentaro Ichii, Hirotaka Ono, Kyouzou Tsujikawa +1 more | 2016-02-02 |
| 7920793 | Inline repeater and optical fiber communication system | Kenji Sato, Yutaka Miyamoto | 2011-04-05 |
| 7589888 | Optical amplifier having a constant gain profile | Shinichi Aozasa, Makoto Shimizu | 2009-09-15 |
| 7538937 | Optical amplifier | Shinichi Aozasa, Makoto Shimizu | 2009-05-26 |
| 7379236 | Optical fiber communication system using remote pumping | Hiroto Kawakami, Yutaka Miyamoto | 2008-05-27 |
| 7042634 | Optical amplifier | Shinichi Aozasa, Makoto Shimizu | 2006-05-09 |
| 6900885 | White light source | Hirotaka Ono, Makoto Shimizu | 2005-05-31 |
| 6771414 | Optical fiber amplifier and optical communication system using the same | Atsushi Mori, Makoto Shimizu | 2004-08-03 |
| 6721092 | Thulium-doped fiber amplifier using pump light for improving conversion efficiency in a S-band | Shinichi Aozasa, Tadashi Sakamoto, Makoto Shimizu, Yoshiki Nishida | 2004-04-13 |
| 6678087 | Optical amplifier and optical fiber communication system using the amplifier | Noboru Takachio | 2004-01-13 |
| 6583924 | Optical amplifier | Junichi KANI, Noboru Takachio | 2003-06-24 |
| 6469826 | Optical amplifier | Junichi KANI, Noboru Takachio | 2002-10-22 |
| 6172803 | Optical amplifier and transmission system using the same | Shingo Kawai, Kenichi Suzuki, Kazuo Aida | 2001-01-09 |
| 6122087 | Optical-frequency-stabilized light source | Seiji Nogiwa, Tatsuhiko Takatsu, Naoto Sato, Kazuo Aida | 2000-09-19 |
| 5471334 | Method and apparatus for monitoring noise figure of optical amplifier | Kazuo Aida, Kiyoshi Nakagawa | 1995-11-28 |
| 5245690 | Optical fiber amplifier including rare earth doped fiber and feedback pump light source control | Kazuo Aida, Kiyoshi Nakagawa | 1993-09-14 |