| 11876559 |
Optical transmission system and fiber type determination method |
Goji Nakagawa, Takafumi Terahara |
2024-01-16 |
| 10541749 |
Optical wavelength multiplexing transmission apparatus and optical wavelength multiplexing transmission method |
Shigeru Ishii, Takehiro Fujita, Tatsuya Tsuzuki |
2020-01-21 |
| 10256903 |
Network controller and signal quality estimating method |
Shoichiro Oda, Yasuhiko Aoki, Takeshi Hoshida, Hisao Nakashima |
2019-04-09 |
| 10020878 |
Optical signal-to-noise ratio monitor and method for measuring optical signal to-noise ratio |
Shoichiro Oda, Yasuhiko Aoki, Satoru Okano, Yoichi Akasaka, Jeng-Yuan Yang |
2018-07-10 |
| 9906296 |
Network controller and signal quality estimating method |
Shoichiro Oda, Yasuhiko Aoki, Takeshi Hoshida, Hisao Nakashima |
2018-02-27 |
| 9444572 |
Transmission device and transmission method |
Tomohiro Kaneoka, Norifumi Shukunami |
2016-09-13 |
| 9432113 |
Optical transmission device |
Kosuke Komaki |
2016-08-30 |
| 9071379 |
Optical branching and insertion device, network management device, and wavelength selective switch |
Takafumi Terahara |
2015-06-30 |