SEMICONDUCTOR LASER WITH EXTERNAL CAVITY HAVING NON-STRAIGHT WAVEGUIDE
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United States of America Patent
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Issued Date -
Dec 3, 2015
app pub date -
Nov 13, 2014
filing date -
May 30, 2014
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a semiconductor laser with an external cavity having a non-straight waveguide, in which a semiconductor laser diode used as an optical gain medium has a nonreflective coated side, light emitted from the laser diode chip is collected to a waveguide type of waveguide-selective filter and light having a wavelength selected by a grating on the waveguide is fed back to the laser diode chip, and the wavelength of emitted light is changed by electrically or thermally changing the properties of the waveguide.
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