Abstract

The influence of the refractive index of a superstrate on propagation losses of an optical waveguide is measured. A 72-cm-long channel waveguide is made by potassium ion exchange in microscope slides. Propagation losses are reduced from 0.4 dB/cm with air as the superstrate to 0.28 dB/cm with a liquid superstrate of refractive index 1.46.

© 1995 Optical Society of America

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