The laser induced damage threshold (LIDT) of single crystal zinc germanium phosphide (ZGP), ZnGeP2, was increased to 2 J/cm2 at 2.05 microns and 10 kHz pulse rate frequency (double the previously measured value of 1 J/cm2). This increased LIDT was achieved by improving the polishing of ZGP OPO crystals. The surface preparation of ZGP samples was determined to be of great importance because laser-induced damage has been observed to always ...
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