Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7400444 | Optical amplifier and control method for optical amplifier | Norifumi Shukunami, Mayumi Naito | 2008-07-15 |
| 7394589 | Optical amplifier for wide band Raman amplification of wavelength division multiplexed (WDM) signal lights | Miki Onaka, Etsuko Hayashi, Yasushi Sugaya, Susumu Kinoshita | 2008-07-01 |
| 7362499 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Yasushi Sugaya, Miki Onaka | 2008-04-22 |
| 7245422 | Raman optical amplifier, optical transmission system using the same, and raman optical amplification method | — | 2007-07-17 |
| 7133192 | Light amplification control unit and method | Yuji Tamura | 2006-11-07 |
| 7042636 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Yasushi Sugaya, Miki Onaka | 2006-05-09 |
| 6891661 | Optical amplifier with pump light source control for Raman amplification | Etsuko Hayashi, Yasushi Sugaya, Miki Onaka | 2005-05-10 |
| 6873455 | Optical amplification apparatus utilizing raman amplification and controlling method thereof | Yasushi Sugaya, Etsuko Hayashi | 2005-03-29 |
| 6847478 | Optical amplification apparatus using Raman amplification | Miki Onaka, Etsuko Hayashi, Yasushi Sugaya | 2005-01-25 |
| 6683712 | Optical amplification apparatus using Raman amplification | Miki Onaka, Etsuko Hayashi, Yasushi Sugaya | 2004-01-27 |
| 6624926 | Optical amplifier with pump light source control for raman amplification | Etsuko Hayashi, Yasushi Sugaya, Miki Onaka | 2003-09-23 |
| 6577437 | Optical amplification apparatus utilizing Raman amplification and controlling method thereof | Yasushi Sugaya, Etsuko Hayashi | 2003-06-10 |
| 6510000 | Optical amplifier for wide band raman amplification of wavelength division multiplexed (WDM) signal lights | Miki Onaka, Etsuko Hayashi, Yasushi Sugaya, Susumu Kinoshita | 2003-01-21 |
| 6441951 | Optical amplification apparatus using Raman amplification | Miki Onaka, Etsuko Hayashi, Yasushi Sugaya | 2002-08-27 |
| 6388801 | Optical amplification apparatus utilizing Raman amplification and controlling method thereof | Yasushi Sugaya, Etsuko Hayashi | 2002-05-14 |