发明名称 |
AN OPTICAL AMPLIFIER AND A METHOD OF PREVENTING EMISSION THEREFROM OF OPTICAL POWER EXCEEDING A PRESCRIBED SAFETY LIMIT |
摘要 |
<p>An optical amplifier comprises an active fiber (1), a pump unit (2) spaced from the active fiber and adapted to give a nominal, continuous pump power in an operational state, and a pump fiber (3) adapted to transfer optical pump power from the rump unit (2) to the active fiber (1). Moreover, in a safety state, the pump unit (2) is adapted to give a pulsed pump power whose mean power is lower than a prescribes safety limit.A method of preventing emission of optical power exceeding a prescribed safety limit on interruption of an optical fiber (3) which transfers pump power from a pump unit (2) to an active fiber (1), comprises changing the mean power of the pump power in response to a signal received from the active fiber (1) so that the mean power assumes a value below said safety limit if said signal is not received, and assumes a nominal value if said signal is received.</p> |
申请公布号 |
EP0956666(B1) |
申请公布日期 |
2002.07.10 |
申请号 |
EP19970912070 |
申请日期 |
1997.11.14 |
申请人 |
TELLABS DENMARK A/S |
发明人 |
PEDERSEN, CLAUS, FRIIS;NIELSEN, SOREN, MORTEN |
分类号 |
H01S3/13;H01S3/131;H04B10/291;(IPC1-7):H04B10/24;G01M11/08;H01S3/091 |
主分类号 |
H01S3/13 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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