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Comparison of losses in imperfect surface-diffused and buried optical waveguides

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Abstract

Theoretical expressions for the scattering losses caused by surface imperfections in both buried guiding layers with a cosh−2 (x/d) index distribution and surface-diffused waveguides with an exponential profile are presented. Theoretical comparison of radiation losses in buried, surface-diffused, and uniform abrupt guides indicates that, in general, buried layers have lower losses, in agreement with experimental evidence.

© 1979 Optical Society of America

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