Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shinsuke Tanaka0
Kazumasa Takabayashi0
Ken Morito0
Date of Patent
January 2, 2007
Patent Application Number
11004907
Date Filed
December 7, 2004
Patent Primary Examiner
Patent abstract
A wavelength tunable laser device includes: a pair of reflection mirrors; a semiconductor element disposed between the pair of reflection mirrors, the semiconductor element integrating a region for providing an optical gain, a region having a wavelength tunable filter function and a phase control region; and an optical filter disposed between the semiconductor element and one of the pair of reflection mirrors, the optical filter having periodical transmission wavelengths. A wavelength tunable laser device is provided which is easy to be controlled and can be made compact.
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