Issued Patents All Time
Showing 101–125 of 130 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6426832 | Wavelength-multiplexed light amplifying apparatus, optical amplifier and optical add-and-drop apparatus using wavelength-multiplexed light amplifying basic unit | — | 2002-07-30 |
| 6411431 | Optical amplifier for amplifying light in a long wavelength band | Yasushi Sugaya, Hiroshi Onaka | 2002-06-25 |
| 6400499 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2002-06-04 |
| 6377395 | 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 | 2002-04-23 |
| 6373623 | Optical amplifier for use in optical communications equipment | Chihiro Ohshima, Terumi Chikama | 2002-04-16 |
| 6369938 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2002-04-09 |
| 6359726 | Wavelength division multiplexing optical amplifier with function of gain-equalizing and optical communication system | Miki Onaka | 2002-03-19 |
| 6342965 | Optical fiber amplifier and dispersion compensating fiber module for optical fiber amplifier | — | 2002-01-29 |
| 6335823 | Optical amplifier for use in optical communications equipment | Chihiro Ohshima, Terumi Chikama | 2002-01-01 |
| 6288834 | Optical amplifier for amplifying light in a long wavelength band | Yasushi Sugaya, Hiroshi Onaka | 2001-09-11 |
| 6282017 | Optical communication system and optical amplifier | — | 2001-08-28 |
| 6259553 | Optical communication system and optical amplifier | — | 2001-07-10 |
| 6198572 | 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 | 2001-03-06 |
| 6178037 | Optical amplifying apparatus | Yasushi Sugaya, Hiroshi Onaka, Terumi Chikama | 2001-01-23 |
| 6172801 | Optical amplifier, optical amplifying apparatus, optical transmitter for use in optical communications system, and optical surge suppression method for the optical amplifier | Miki Takeda | 2001-01-09 |
| 6160659 | Method and apparatus for monitoring the momental wavelength of light, and an optical amplifier and an optical communication system which incorporate the method and apparatus to adjust gain tilt | — | 2000-12-12 |
| 6157481 | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of the channels are varied | Yasushi Sugaya | 2000-12-05 |
| 6151158 | Method and device for optical amplification and system having the device | Miki Takeda, Hiroshi Onaka | 2000-11-21 |
| 6144485 | 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 | 2000-11-07 |
| 6108123 | Optical communication system and optical amplifier | — | 2000-08-22 |
| 6055092 | Multi-wavelength light amplifier | Yasushi Sugaya, Miki Takeda, Terumi Chikama | 2000-04-25 |
| 6025947 | 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 | 2000-02-15 |
| 6023366 | Optical communication system and optical amplifier | — | 2000-02-08 |
| 5995274 | Multi-wavelength light amplifier | Yasushi Sugaya | 1999-11-30 |
| 5966237 | 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 | 1999-10-12 |