Keywords
KH2PO4
NH4H2PO4
How to Cite
Abstract
An attempt to measure the fourth-order electrooptic effect in KH2PO4 (KDP) and NH4H2PO4 (ADP) is presented. Contrary to previously reported results of the order of magnitude 10-30 m4V-4, the fourth-order coefficient |g111111 - g221111| is found to be lower than 5∙10-33 m4V-4 and 1∙10-34 m4V-4, respectively. In addition, the effect of imperfect crystal cutting and alignment is investigated by means of calculations based on Jones calculus. It is found that even small inaccuracies may lead to an apparent fourth-order electrooptic effect comparable in magnitude to the previously reported values.
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