Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Haruhisa Soda0
Date of Patent
May 4, 2010
0Patent Application Number
120283110
Date Filed
February 8, 2008
0Patent Primary Examiner
Patent abstract
A gain element and a variable wavelength reflector form a resonator. A wavelength selective element selects a resonance wavelength in the resonator. A beam splitter is provided for monitoring an incident light from the gain element and a reflected light from the variable wavelength reflector. A phase adjustment element is arranged in the resonator. A wavelength-lock control unit locks the resonance wavelength to a desired resonance wavelength by adjusting the phase of the resonance wavelength based on the monitored incident light and by adjusting the variable wavelength reflector based on a ratio between the incident light and the reflected light.
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