An Evaluation of Nonlinear Optical Materials by the Second-Harmonic Powder Technique
NAVAL RESEARCH LAB WASHINGTON DC
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The nonlinear optical properties of 21 crystalline materials, principally of the iodate family of compounds, were evaluated using the second- harmonic powder technique developed by Kurtz and Perry. By this method the second-harmonic radiation generated in a powdered sample by a laser at 1.06 micrometers was compared with a known reference, LiIO3 in this case. Of the materials tested, 12 have previously been reported on in the literature, and the present results are in substantial agreement. KIO3 and RbIO3 are identified as having the most promise for crystal development effort. The remaining materials, observed for the first time, failed to exhibit appreciable second- harmonic intensity.