Compact tunable laser device
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United States of America Patent
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Mar 6, 2018
Grant Date -
Dec 22, 2016
app pub date -
Sep 6, 2016
filing date -
Mar 26, 2013
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Abstract
A semiconductor laser device which comprises a laser diode chip (100) that emits laser light; a 45° reflective mirror (400) that changes laser light traveling horizontally to a package bottom into laser light traveling perpendicular to the package bottom. The 45° reflective mirror (400) is a partial reflective mirror which has a partial reflection/partial transmission characteristic. An optical feedback-partial reflective mirror (500) is disposed along a path of light passing vertically through the 45° reflective mirror (400). The optical feedback-partial reflective mirror (500) supplies some of the laser light traveling through the 45° reflective mirror (400) back to the 45° reflective mirror 400 by reflecting a first portion of the laser light while transmitting a remaining portion of the laser light.
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