发明名称 |
Gain-controllable optical amplifier and optical gain-control method |
摘要 |
This invention provides an optical amplifier which has low noise characteristics for a wide range of input signal electric power. The optical amplifier has a plurality of cascaded optical amplifying units, a signal level detector, and a pump-source controller. The pump-source controller changes controlling objects from a pump-source corresponding to a first one of the optical amplifying units to a pump-source corresponding to a second one of the optical amplifying units according to a detection level of the signal level detector from a low level to a high level. When the detection level is outside of a control object range, the optical amplifier controls an output from the pump-source to stabilize. When the detection level is within the control object range, the optical amplifier controls an output from a pump-source of each of optical amplifying units according to the detection level.
|
申请公布号 |
US5710660(A) |
申请公布日期 |
1998.01.20 |
申请号 |
US19960606653 |
申请日期 |
1996.02.26 |
申请人 |
KOKUSAI DENSHIN DENWA CO., LTD.;MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
YAMAMOTO, SHU;TAGA, HIDENORI;EDAGAWA, NOBORU;AKIBA, SHIGEYUKI;MOTOSHIMA, KUNIAKI;TAKANO, KATSUMI;KITAYAMA, TADAYOSHI |
分类号 |
G02F1/35;H01S3/06;H01S3/067;H01S3/07;H01S3/13;H01S3/131;H04B10/17;(IPC1-7):H01S3/00;C02B6/00 |
主分类号 |
G02F1/35 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|