Surface-emitting laser device, surface-emitting laser array, optical scanning apparatus and image forming apparatus
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United States of America Patent
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Feb 17, 2015
Grant Date -
Apr 17, 2014
app pub date -
Dec 19, 2013
filing date -
Nov 27, 2008
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Abstract
A surface-emitting laser device configured to emit laser light in a direction perpendicular to a substrate includes a p-side electrode surrounding an emitting area on an emitting surface to emit the laser light; and a transparent dielectric film formed on an outside area outside a center part of the emitting area and within the emitting area to lower a reflectance to be less than that of the center part. The outside area within the emitting area has shape anisotropy in two mutually perpendicular directions.
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