Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
November 25, 2008
Patent Application Number
11068869
Date Filed
March 2, 2005
Patent Primary Examiner
Patent abstract
Arrayed DBR (Distributed Bragg Reflector) laser shows a problem that spectrum purity is deteriorated when a current is flowed in a semiconductor optical amplifier for attaining a sufficient optical output. In addition, the arrayed waveguide grating laser shows a problem that the spectrum purity is deteriorated by leakage of light. An output end of each of the laser channels is provided with a gate (a core) that can be controlled through bias application. The gate has a function for amplifying light when the laser channels are operated and for absorbing light when the laser channels are not operated.
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