Issued Patents 2003
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646791 | 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 | 2003-11-11 |
| 6633429 | Optical amplification method and device usable with bands other than the C-band | Shinya Inagaki | 2003-10-14 |
| 6631026 | Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method | Terumi Chikama | 2003-10-07 |
| 6603596 | Gain and signal level adjustments of cascaded optical amplifiers | Shinya Inagaki, Norifumi Shukunami, Hiroyuki Itou, Taiki Kobayashi | 2003-08-05 |
| 6580549 | Wavelength-multiplexed light amplifying apparatus, optical amplifier and optical add-and-drop apparatus using wavelength-multiplexed light amplifying basic unit | — | 2003-06-17 |
| 6542291 | Optical amplifier excitation light source control method for use in optical amplifier and optical amplifier control method | Terumi Chikama | 2003-04-01 |
| 6529314 | Method and apparatus using four wave mixing for optical wavelength conversion | Norifumi Shukunami, Toshio Hashi | 2003-03-04 |
| 6510000 | Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights | Miki Onaka, Tomoto Tanaka, Etsuko Hayashi, Yasushi Sugaya | 2003-01-21 |