Method for making optical device with composite passive and tapered active waveguide regions
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United States of America Patent
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Nov 16, 1999
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app pub date -
Sep 29, 1998
filing date -
Feb 24, 1994
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Abstract
A semiconductor optical device, for example a laser, has a composite optical waveguide including a tapered, MQW active waveguide in optical contact with a substantially planar, passive waveguide. The fundamental optical mode supported by the composite waveguide varies along the length of the composite waveguide so that, in a laser, the laser mode is enlarged and is a better match to single mode optical fibre. A method for making such semiconductor optical devices is also disclosed.
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