Optical semiconductor device, driving method therefor and light source and opitcal communication system using the same
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United States of America Patent
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May 26, 1998
Grant Date -
N/A
app pub date -
Apr 25, 1996
filing date -
Apr 27, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical semiconductor device, such as an optical flter and an oscillation polarization selective semiconductor device for switching oscillation polarization modes between two different polarization modes, includes at least one gain region, at least one lossy region, a first control unit for controlling the gain region to control a gain spectrum of the device, and a second control unit for controlling the lossy region to control a cavity loss spectrum of the device such that a polarization dependency with respect to the two different polarization modes is imparted to the cavity loss spectrum. The gain region includes a light waveguide with an active layer which allows the two different polarization modes. The lossy region includes a light waveguide which allows the two different polarization modes.
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