Tunable laser source apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 15, 2003
Grant Date -
Jun 28, 2001
app pub date -
Dec 19, 2000
filing date -
Dec 22, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tunable laser source apparatus including an external cavity has a semiconductor laser and a wavelength selector. The semiconductor laser includes a reflection surface, a surface with an anti-reflection film and an active layer. The selector selects from laser light emitted from the laser through the surface with the anti-reflection film and feeding laser light of a desired wavelength back to the laser through the surface with the anti-reflection film. The semiconductor laser has a window region formed between a tip portion of the active layer extending toward the surface with the anti-reflection film and the surface with the anti-reflection film, the window region allowing the laser light of the desired wavelength fed back from the selector to be coupling thereon, while dilating the beam size of a portion of the laser light which is reflected from the surface with the anti-reflection film and reach the tip portion film.
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