Issued Patents All Time
Showing 151–175 of 181 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7606504 | Optical receiver and optical receiving method corresponding to differential M-phase shift keying system | Hiroshi Onaka | 2009-10-20 |
| 7602322 | Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device | Takahito Tanimura, Hisao Nakashima | 2009-10-13 |
| 7603045 | Method and system for automatic feedback control for fine tuning a delay interferometer | Seemant Choudhary | 2009-10-13 |
| 7603007 | Quadrature phase-shift keying modulator and phase shift amount controlling method for the same | Takafumi Terahara, Kentaro Nakamura, Yuichi Akiyama, Hiroki Ooi, Jens Rasmussen +1 more | 2009-10-13 |
| 7596315 | Wavelength division multiplexing optical transmission system and transmission wavelength control method therefor | Hisao Nakashima | 2009-09-29 |
| 7593646 | Upgraded optical communication system with increased transmission capacity and method | Olga Vassilieva | 2009-09-22 |
| 7583895 | Polarization scrambler, optical add/drop multiplexer, optical route switching apparatus and wavelength division multiplexing optical transmission system | Kentaro Nakamura, Masahiro Yuki, George Ishikawa | 2009-09-01 |
| 7555061 | Optical communication device | Toru Katagiri, Tomoo Takahara, Kentaro Nakamura, Naoki Kuwata | 2009-06-30 |
| 7529490 | Optical receiver and optical reception method compatible with differential quadrature phase shift keying | — | 2009-05-05 |
| 7515834 | Upgraded optical communication system with increased transmission capacity and method | Olga Vassilieva | 2009-04-07 |
| 7505414 | Network designing device and computer-readable medium | Hisao Nakashima, Yuichi Akiyama, Takafumi Terahara | 2009-03-17 |
| 7483639 | Method and system for transmitting information in an optical communication system using distributed amplification | Hiroshi Onaka, Takafumi Terahara | 2009-01-27 |
| 7477848 | Optical receiving apparatus and method for controlling the optical receiving apparatus | Hiroki Ooi, Akira Miura | 2009-01-13 |
| 7415182 | Optical fiber cable | Takafumi Terahara, Rainer Hainberger | 2008-08-19 |
| 7382979 | Wavelength dispersion compensation design method and a system thereof | Yuichi Akiyama, Takafumi Terahara, Hisao Nakashima | 2008-06-03 |
| 7254342 | Method and system for transmitting information in an optical communication system with low signal distortion | Kaori Odate, Olga Vassilieva | 2007-08-07 |
| 7254325 | Method and system for optical performance monitoring | — | 2007-08-07 |
| 7233742 | Optical communication system, method for supplying pump light, and distributed Raman amplifying apparatus | Takafumi Terahara | 2007-06-19 |
| 7200344 | Receiver and method for a multichannel optical communication system | — | 2007-04-03 |
| 7197251 | Optical phase modulation | Seemant Choudhary | 2007-03-27 |
| 7110680 | Method and system for forward pumping Raman amplification in an optical network | Seemant Choudhary | 2006-09-19 |
| 7099541 | Optical fiber cable | Takafumi Terahara, Rainer Hainberger | 2006-08-29 |
| 7035543 | Method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals | Hiroshi Onaka | 2006-04-25 |
| 6990296 | Optical phase modulation | Seemant Choudhary | 2006-01-24 |
| 6959128 | Coupler-based optical cross-connect having a regeneration module | Gerardo Castanon, Remi Pecqueur | 2005-10-25 |