External cavity laser apparatus and methods
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United States of America Patent
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Jul 13, 2004
Grant Date -
Dec 18, 2003
app pub date -
Jun 15, 2002
filing date -
Jun 15, 2002
priority date (Note) -
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Abstract
Laser apparatus and methods that use active thermal adjustment of an external laser cavity to minimize losses and provide wavelength stability and provide wavelength tuning. The apparatus comprise a thermally conductive platform, a gain medium thermally coupled to the platform, the gain medium having a first facet emitting a first light beam from the first facet, and a reflective element positioned in the first light beam and coupled to the platform, the reflective element and the second facet defining an external laser cavity. The reflective element is mounted on the platform and may be thermally coupled to the platform. Selective thermal control of the external cavity optical path length during laser operation is provided by heating and cooling of the thermally conductive platform.
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