发明名称 |
Band-expanding method for optical amplifiers and optical transmission apparatus |
摘要 |
<p>A method for enabling a pump laser to be added on by means of an optical fiber Raman amplifier and reducing signal degradation to be caused by a gain change to occur after and in the pump laser source add-on process. <??>The above method is achieved as follows. Add-on ports 114-1 and 114-2 are provided in a wavelenth multiplexer 110 so as to enable new wavelength pump laser sources to be added on. When an add-on pump laser source 112 is turned on, the output intensity of each of the pre-installed Raman pump lasers 111-1 and 111-2 changes, thereby the intensity of each signal laser in each pre-installed band is kept unchanged before and after the add-on. The output intensity of each pump laser source that increases/decreases the output, for example, during the add-on is changed linearly with time, thereby the transient gain changes in the pre-installed bands are prevented. <IMAGE></p> |
申请公布号 |
EP1249901(A2) |
申请公布日期 |
2002.10.16 |
申请号 |
EP20010119778 |
申请日期 |
2001.08.28 |
申请人 |
HITACHI, LTD. |
发明人 |
KIKUCHI, NOBUHIKO;TAKEYARI, RYOJI |
分类号 |
G02F1/35;H01S3/06;H01S3/067;H01S3/094;H01S3/0941;H01S3/30;H01S5/50;H04B10/07;H04B10/29;H04B10/294;H04B10/40;H04B10/50;H04B10/60;(IPC1-7):H01S3/30;H04B10/17 |
主分类号 |
G02F1/35 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|