SEMICONDUCTOR OPTICAL DEVICE AND OPTICAL MODULE
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United States of America Patent
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Issued Date -
Mar 12, 2015
app pub date -
Sep 9, 2014
filing date -
Sep 12, 2013
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Abstract
To suppress occurrence of axial hole burning in a phase shift portion of a diffraction grating, provided is a semiconductor optical device including: a diffraction grating layer including a diffraction grating and a phase shift portion; and an optical waveguide layer including an active layer that has a gain with respect to an emission wavelength and an optical waveguide region that has no gain with respect to the emission wavelength. The optical waveguide region is formed at least on the lower side of the phase shift portion.
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