Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroyuki Nakano0
Yasuhiro Uchiyama0
Date of Patent
April 13, 2010
0Patent Application Number
117523310
Date Filed
May 23, 2007
0Patent Primary Examiner
Patent abstract
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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