Issued Patents All Time
Showing 26–50 of 84 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7035543 | Method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals | Takeshi Hoshida | 2006-04-25 |
| 7020399 | Optical transmission apparatus and method which adjust rise and fall time of signal light to be transmitted | Hideyuki Miyata, Hiroshi Nakamoto | 2006-03-28 |
| 7006771 | Optical communication apparatus and optical add/drop apparatus | Hideyuki Miyata | 2006-02-28 |
| 6978064 | Variable optical filter and optical transmission system using same, and method of controlling variable optical filter | Setsuo Yoshida | 2005-12-20 |
| 6941078 | Method and system for communicating a clock signal over an optical link | — | 2005-09-06 |
| 6934433 | Control method and control apparatus of optical device | Hideyuki Miyata, Tadao Nakazawa, Yutaka Kai, Hiroshi Miyata, Yoichi Takasu +1 more | 2005-08-23 |
| 6930824 | Optical amplifier which compensates for dispersion of a WDM optical signal | George Ishikawa, Hideyuki Miyata, Motoyoshi Sekiya, Kazue Otsuka | 2005-08-16 |
| 6847662 | Wavelength-selectable laser capable of high-speed frequency control | Martin Bouda, Ken Morito, Kazumasa Takabayashi, Tadao Nakazawa, Naoki Hashimoto +1 more | 2005-01-25 |
| 6782017 | Wavelength locker and wavelength discriminating apparatus | Yutaka Kai, Hideyuki Miyata | 2004-08-24 |
| 6741390 | Variable wavelength light source apparatus and optical amplifier using same | Miki Onaka, Etsuko Hayashi | 2004-05-25 |
| 6717713 | Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal | Nobuhiro Fukushima | 2004-04-06 |
| 6654561 | Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method and optical communication system each utilizing the method | Takafumi Terahara, Takeshi Sakamoto, Hiroaki Tomofuji, Motoyoshi Sekiya, Makoto Murakami +1 more | 2003-11-25 |
| 6583900 | Optical transmission apparatus, optical transmission system, and optical terminal station | Hideyuki Miyata, Kazue Otsuka, Yutaka Kai, Tadao Nakazawa, Terumi Chikama | 2003-06-24 |
| 6570699 | Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal | Nobuhiro Fukushima | 2003-05-27 |
| 6545784 | Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit | Kazue Okazaki, Hideyuki Miyata, Yutaka Kai, Terumi Chikama | 2003-04-08 |
| 6538782 | Light branching/inserting apparatus and light branching apparatus using wavelength selection filter | Kazue Otsuka, Terumi Chikama | 2003-03-25 |
| 6462844 | WAVELENGTH-DIVISION MULTIPLEXING TRANSMISSION SYSTEM, A METHOD FOR DESIGNING A LOSS DIFFERENCE COMPENSATOR FOR OPTICAL DEVICES USED IN THE WAVELENGTH-DIVISION MULTIPLEXING TRANSMISSION SYSTEM, AND A METHOD FOR CONFIGURING THE WAVELENGTH-DIVISION MULTIPLEXING TRANSMISSION SYSTEM | Yutaka Kai | 2002-10-08 |
| 6417945 | Optical wavelength multiplex transmission method and optical dispersion compensation method | George Ishikawa, Hideyuki Miyata, Motoyoshi Sekiya, Kazue Okazaki | 2002-07-09 |
| 6411431 | Optical amplifier for amplifying light in a long wavelength band | Yasushi Sugaya, Susumu Kinoshita | 2002-06-25 |
| 6384943 | Optical wavelength multiplex transmission method and optical dispersion compensation method | George Ishikawa, Hideyuki Miyata, Motoyoshi Sekiya, Kazue Okazaki | 2002-05-07 |
| 6366376 | Optical transmitting device using wavelength division multiplexing to transmit signal lights having frequencies arranged to eliminate effects of four-wave mixing (FWM) | Hideyuki Miyata, Terumi Chikama | 2002-04-02 |
| 6351323 | Optical transmission apparatus, optical transmission system, and optical terminal station | Hideyuki Miyata, Kazue Otsuka, Yutaka Kai, Tadao Nakazawa, Terumi Chikama | 2002-02-26 |
| 6333806 | Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal | Nobuhiro Fukushima | 2001-12-25 |
| 6288834 | Optical amplifier for amplifying light in a long wavelength band | Yasushi Sugaya, Susumu Kinoshita | 2001-09-11 |
| 6285479 | Optical cross connect unit, optical add-drop multiplexer, light source unit, and adding unit | Kazue Okazaki, Hideyuki Miyata, Yutaka Kai, Terumi Chikama | 2001-09-04 |