Issued Patents All Time
Showing 51–75 of 130 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7379235 | Reducing polarization dependence of a wavelength dispersion variation monitor | Cechan Tian | 2008-05-27 |
| 7369765 | Optical network with selective mode switching | Yasuhiko Aoki, Cechan Tian, Olga Vassilieva | 2008-05-06 |
| 7321729 | Optical ring network with selective signal regeneration and wavelength conversion | Ashwin Gumaste | 2008-01-22 |
| 7305184 | Method and system for management of directly connected optical components | Cechan Tian, Yasuhiko Aoki | 2007-12-04 |
| 7283750 | System and method for setting a tunable filter in an optical network | Cechan Tian | 2007-10-16 |
| 7283740 | Optical ring network with optical subnets and method | Koji Takeguchi, Ashwin Gumaste | 2007-10-16 |
| 7283739 | Multiple subnets in an optical ring network and method | Koji Takeguchi, Ashwin Gumaste | 2007-10-16 |
| 7266294 | Coupler-based optical cross-connect | Yasuhiko Aoki, Koji Takeguchi | 2007-09-04 |
| 7254292 | Directing optical channels using a reflective device | Cechan Tian | 2007-08-07 |
| 7231148 | Flexible open ring optical network and method | Koji Takeguchi, Satoru Odate, Cechan Tian | 2007-06-12 |
| 7227681 | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied | Yasushi Sugaya | 2007-06-05 |
| 7224517 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2007-05-29 |
| 7200332 | System and method for assigning traffic to wavelengths in optical networks | Ashwin Gumaste, Koji Takeguchi | 2007-04-03 |
| 7184663 | Optical ring network with hub node and method | Ashwin Gumaste, Koji Takeguchi | 2007-02-27 |
| 7120360 | System and method for protecting traffic in a hubbed optical ring network | Cechan Tian | 2006-10-10 |
| 7116905 | Method and system for control signaling in an open ring optical network | Koji Takeguchi, Satoru Odate, Cechan Tian | 2006-10-03 |
| 7110166 | Raman pump power control for gain flattening | Miki Onaka | 2006-09-19 |
| 7085496 | Passive add/drop amplifier for optical networks and method | Remi Pecqueur, Cechan Tian | 2006-08-01 |
| 7075712 | Combining and distributing amplifiers for optical network and method | Remi Pecqueur, Cechan Tian | 2006-07-11 |
| 7076163 | Method and system for testing during operation of an open ring optical network | Koji Takeguchi, Satoru Odate, Cechan Tian | 2006-07-11 |
| 7061666 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Norifumi Shukunami, Hiroyuki Itou, Taiki Kobayashi | 2006-06-13 |
| 7057149 | Method and system for controlling a secondary amplifier with a primary amplifier in an optical network | Cechan Tian | 2006-06-06 |
| 7027210 | Method and system for determining gain for an optical signal | Cechan Tian | 2006-04-11 |
| 7009761 | Power tilt compensation using automatic power balance control | Cechan Tian | 2006-03-07 |
| 7006282 | Control system and method for an optical amplifier | Cechan Tian, Joseph R. Rodriguez | 2006-02-28 |