Abstract
We have developed Gd x Y 1− x Ca 4O(BO 3) 3 (Gd x Y 1− x COB) crystal in order to control optical birefringence. Gd x Y 1− x COB (0< x<1) crystals with uniform composition have been grown by the Czochralski method. The noncritical phase matching (NCPM) wavelength for second-harmonic generation (SHG) could be tuned in the range from 830 to 970 nm by changing the compositional parameter x. Furthermore, we have succeeded to generate NCPM third harmonic of Nd : YAG laser radiation (1064 nm).
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