发明授权
US07697845B2 Optical transmission equipment and optical add-drop multiplexer 失效
光传输设备和光分插复用器

Optical transmission equipment and optical add-drop multiplexer
摘要:
An optical add-drop function part of an optical add-drop multiplexer has an output end of transmitted light signal in which an optical termination mechanism formed by an optical detector for detecting open of an optical fiber, an optical switch, and an optical terminator are mounted. Further, a reflection level calculation circuit, a reflection warning determination circuit, and an optical switch selection circuit are mounted to perform laser safety in the optical add-drop function part as well. The laser safety part in the optical add-drop function part is operated earlier than the laser safety part in an optical amplification function part.
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