Optimization and control of grating coupling to or from a silicon‐based optical waveguide

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Abstract
The analysis of a silicon‐based step‐index waveguide with a corrugation grating at its surface is performed by considering the reflection between the silicon substrate and the optical buffer. The conditions on the silica buffer thickness for maximum in/out coupling into the substrate and into the air are given analytically, and a number of features of practical interest are described. © 1996 Society of Photo−Optical Instrumentation Engineers.
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