Abstract

The electric field distribution and complex propagation constants of a multimode dielectric optical waveguide with complex index of refraction were calculated. A waveguide with a similar structure was fabricated by ion exchange into a glass substrate. The complex index of refraction region was provided by flowing a dye solution over the waveguide surface. Optical gain as high as 40%/cm was obtained. An experimental determination of the gain of various propagating modes was made and found to be in good agreement with theoretically calculated values.

© 1990 Optical Society of America

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