Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8538264 | Dispersion compensating apparatus, dispersion compensating method, optical receiving apparatus, and optical receiving method | Masahiro Yuki, Tsukasa Takahashi, Miki Onaka, Tatsuya Tsuzuki, Toshihiro Ohtani +1 more | 2013-09-17 |
| 8134775 | Raman amplifier with signal modulated before stimulated brillouin scattering occurs | Yuichi Suzuki | 2012-03-13 |
| 8068275 | Method for measuring nonlinear optical properties | Tatsuya Tsuzuki | 2011-11-29 |
| 7969648 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Susumu Kinoshita, Hiroyuki Itou, Taiki Kobayashi | 2011-06-28 |
| 7929201 | Multistage optical amplifier with gain control using pump ratio | Tatsuya Tsuzuki, Yuji Tamura, Yoshio Shimano, Masao Nakata, Takashi Satou | 2011-04-19 |
| 7924499 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Susumu Kinoshita, Hiroyuki Itou, Taiki Kobayashi | 2011-04-12 |
| 7899296 | Optical fiber reel | Kazunori Miura, Hiroki Horiuchi | 2011-03-01 |
| 7692849 | Method for measuring nonlinear optical properties, and optical amplifier and optical transmission system using same | Tatsuya Tsuzuki | 2010-04-06 |
| 7417791 | Optical amplifier for amplifying multi-wavelength light | Miki Onaka, Yasushi Sugaya, Etsuko Hayashi, Manabu Watanabe | 2008-08-26 |
| 7400444 | Optical amplifier and control method for optical amplifier | Tomoto Tanaka, Mayumi Naito | 2008-07-15 |
| 7296940 | Optical fiber connecting portion structure and light monitor apparatus | Hiroyuki Furukawa, Keiko Sasaki | 2007-11-20 |
| 7209284 | Optical amplifier using reflection-type variable optical attenuator for feedback | Norihisa Naganuma, Yuichi Suzuki, Takashi Ishiwada | 2007-04-24 |
| 7061666 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Susumu Kinoshita, Hiroyuki Itou, Taiki Kobayashi | 2006-06-13 |
| 6903324 | Optical amplifier amplifying wavelength multiplexed light, and wavelength multiplexed light communications system | Hiroaki Tomofuji, Takuji Maeda, Tatsuya Tsuzuki, Yuichi Suzuki | 2005-06-07 |
| 6891662 | Optical amplifier and method for amplifying wavelength multiplexed transmission signal light | Yasushi Sugaya, Etsuko Hayashi, Terumi Chikama, Sinya Inagaki | 2005-05-10 |
| 6856455 | Light source apparatus, optical amplifier and optical communication system | Norihisa Naganuma | 2005-02-15 |
| 6747790 | Optical amplifier for amplifying multi-wavelength light | Miki Onaka, Yasushi Sugaya, Etsuko Hayashi, Manabu Watanabe | 2004-06-08 |
| 6738182 | Optical fiber amplifier | Shinya Inagaki, Manabu Watanabe, Hisashi Takamatsu, Keiko Sasaki, Tomoaki Takeyama +3 more | 2004-05-18 |
| 6603596 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Susumu Kinoshita, Hiroyuki Itou, Taiki Kobayashi | 2003-08-05 |
| 6529314 | Method and apparatus using four wave mixing for optical wavelength conversion | Susumu Kinoshita, Toshio Hashi | 2003-03-04 |
| 6452720 | Light source apparatus, optical amplifier and optical communication system | Norihisa Naganuma | 2002-09-17 |
| 6310717 | Optical amplifier and fiber module for optical amplification | Norihisa Naganuma | 2001-10-30 |
| 6134046 | Optical amplifying fiber and forming method for fiber grating | Shinya Inagaki, Miki Takeda | 2000-10-17 |
| 6061173 | Wavelength-division-multiplexing optical amplifier | Kazuo Yamane, Michikazu Shima, Yumiko Kawasaki, Kenji Tagawa, Shinya Inagaki | 2000-05-09 |
| 5970198 | Optically amplifying fiber and optical fiber amplifier | Shinya Inagaki, Keiko Takeda, Koji Okamura | 1999-10-19 |