Extraordinary Polarised Light does not always yield the Highest Reflectivity from Self-Pumped BaTio sub 3,
SOUTHAMPTON UNIV (UNITED KINGDOM) DEPT OF PHYSICS
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The Cat-Mirror Self Pumped Phase Conjugator, SPPC, has continued to stimulate research since its discovery in 19821. Surgical erasure of photorefractive gratings has been used in attempts to locate principle interaction regions in the conjugator and also to control the magnitude and temporal behaviour of the phase conjugate output. The SPPC has been shown to possess a well defined value of gain-interaction length product. In order to obtain sufficient gain in barium titanates it is necessary to access the r sub 42 electro-optic coefficient by using an extraordinary e polarised input beam. As the plane of polarization of the input beam is rotated only the e component will contribute to the PC output, since the ordinary component does dot see sufficient gain, and is not phased matched to the gratings written by the e component.