Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6654561 | Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method and optical communication system each utilizing the method | Takeshi Sakamoto, Hiroaki Tomofuji, Motoyoshi Sekiya, Makoto Murakami, Kazuo Yamane +1 more | 2003-11-25 |
| 6647211 | REMOTE CONTROL DEVICE OF ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL TRANSMISSION SYSTEM CONTAINING EQUALIZER USING ACOUSTO-OPTIC TUNABLE FILTER AND OPTICAL TRANSMISSION SYSTEM CONTAINING OPTICAL ADD/DROP MULTIPLEXER USING ACOUSTO-OPTIC TUNABLE FILTER | Terumi Chikama | 2003-11-11 |
| 6580551 | Method for gain equalization, and device and system for use in carrying out the method | — | 2003-06-17 |
| 6535309 | Optical multiplexing/demultiplexing apparatus and optical multiplexing/demultiplexing method | — | 2003-03-18 |
| 6512628 | Distributed optical amplifier, amplifying method, and optical communication system | Takeshi Hoshida | 2003-01-28 |