Issued Patents All Time
Showing 51–75 of 181 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9825699 | Method and apparatus for correcting inter-channel power imbalance and receiver | Ying Zhao, Liang Dou, Zhenning Tao, Taku Saito | 2017-11-21 |
| 9686020 | Signal processing device and signal processing method | Hikari Mochizuki, Osamu Takeuchi | 2017-06-20 |
| 9667347 | Optical transmitter, optical receiver, method of compensating non-linear distortion, and communication apparatus | Tomofumi Oyama, Hisao Nakashima | 2017-05-30 |
| 9654224 | Optical transmission device, nonlinear distortion compensation method, and nonlinear distortion pre-equalization method | Tomofumi Oyama, Takahito Tanimura, Hisao Nakashima, Yuichi Akiyama | 2017-05-16 |
| 9564975 | Optical transmission device, method of optical transmission, and non-transitory computer-readable medium | Yuichi Akiyama | 2017-02-07 |
| 9559771 | Optical transmission device, node device, optical transmission method, and optical transmission system | Shoichiro Oda, Yasuhiko Aoki | 2017-01-31 |
| 9553674 | Optical transmitter and method of optical transmission | Takahito Tanimura | 2017-01-24 |
| 9515763 | Digital coherent receiver and receiving method of optical signal | Toshiki Honda | 2016-12-06 |
| 9503211 | Signal detection circuit and optical transmission equipment | Kazuo Hironishi, Shoichiro Oda | 2016-11-22 |
| 9467228 | Optical transmission system and optical transmission method | Hisao Nakashima, Takahito Tanimura | 2016-10-11 |
| 9444554 | Digital coherent receiving apparatus | Nobukazu Koizumi, Takahito Tanimura, Hisao Nakashima, Koji Nakamuta, Noriyasu Nakayama | 2016-09-13 |
| 9419720 | Optical signal transmitter | Yuichi Akiyama, Hideyuki Miyata | 2016-08-16 |
| 9356689 | Optical transmitter and optical signal transmission method | Takahito Tanimura, Masato Nishihara | 2016-05-31 |
| 9281913 | Signal detection circuit and optical transmission equipment | Kazuo Hironishi, Shoichiro Oda | 2016-03-08 |
| 9281937 | Control timing synchronization method, optical transmission system, and optical transmission apparatus | — | 2016-03-08 |
| 9240838 | Optical transmitter and method for controlling bias for optical modulator | Yuichi Akiyama | 2016-01-19 |
| 9225459 | Optical transmission system, optical transmission apparatus, signal conditioning program, and signal conditioning method | Shoichiro Oda, Hisao Nakashima, Takahito Tanimura, Yasuhiko Aoki | 2015-12-29 |
| 9219622 | Method and apparatus for compensating nonlinear damage | Weizhen Yan, Zhenning Tao | 2015-12-22 |
| 9185474 | Wavelength path switching method, optical communication system, optical communication device, optical repeater, and network management device | Kyosuke Sone, Yasuhiko Aoki, Toshiki Tanaka, Shoichiro Oda | 2015-11-10 |
| 9154233 | Frequency modulation signal demodulator and light receiving apparatus | Kazuo Hironishi | 2015-10-06 |
| 9143260 | Optical transmission system, method of adjusting optical transmission device, and non-transitory computer-readable medium | Tomofumi Oyama, Hisao Nakashima | 2015-09-22 |
| 9130680 | Optical transmitter and modulated optical signal generating method | Yuichi Akiyama, Tamotsu Akashi, Yoshio Sakai | 2015-09-08 |
| 9100137 | Crosstalk reduction in optical networks using variable subcarrier spectral allocation | Olga Vassilieva, Motoyoshi Sekiya | 2015-08-04 |
| 9094121 | Optical transmission apparatus | Tomofumi Oyama, Hisao Nakashima | 2015-07-28 |
| 9083459 | Optical transmission system, method of testing optical transmission system, and non-transitory computer-readable medium | Shoichiro Oda, Yasuhiko Aoki, Kyosuke Sone | 2015-07-14 |