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Proceedings Paper

Photorefractive damage to bulk crystals and channel waveguides in periodically poled lithium tantalate
Author(s): William V. Davis; Mool C. Gupta
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Paper Abstract

We present the results of an experimental study of photorefractive damage caused by laser light at a wavelength of 488 nm in z-cut lithium tantalate bulk crystals and channel waveguides. The photorefractive damage was measured using both imaging technique and interferometry. Initially, we measured the photorefractive damage in virgin-poled crystal samples of various grades purchased from several sources. As expected, the amount of photorefractive damage is least in optical-grade crystals. In addition, we compared photorefractive damage in waveguides fabricated in virgin-poled and periodically poled optical-grade z-cut crystals. Our results confirm that the amount of photorefractive damage that occurs during irradiation is less in periodically poled waveguides. Furthermore, heating the waveguide devices to a temperature of 100 degree(s)C during irradiation removes most of the visible distortions of the waveguide mode profile that result from photorefractive damage for both the virgin-poled and periodically poled waveguides.

Paper Details

Date Published: 10 May 1996
PDF: 12 pages
Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); doi: 10.1117/12.239686
Show Author Affiliations
William V. Davis, Eastman Kodak Co. (United States)
Mool C. Gupta, Eastman Kodak Co. (United States)

Published in SPIE Proceedings Vol. 2700:
Nonlinear Frequency Generation and Conversion
Mool C. Gupta; William J. Kozlovsky; David C. MacPherson, Editor(s)

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