Abstract

We observed two-photon-induced refractive-index changes in As2S3 by exposure in the 800-nm region. We studied this photosensitivity by writing interference gratings on a 2-μm As2S3 thin film. This property is the key to creating self-written channel waveguides in a planar As2S3 slab.

© 1998 Optical Society of America

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