Abstract
The optical birefringence of Gd 1 − x R x Ca 4O(BO 3) 3 (R = Lu or Sc) nonlinear crystals can be controlled by changing the compositional parameter x. Single crystals of Gd 1 − x R x Ca 4O(BO 3) 3 with large size and good quality have been grown by Czochralski method. The chemical compositions of the grown crystals were determined and X-ray measurements have been carried out to characterize the structural changes with compositional parameter x. According to our assumptions, the obtained results demonstrate that the grown crystals convert the near-infrared radiation of 800 nm into blue-violet light (400 nm) by type-I noncritical phase-matching (NCPM) second-harmonic generation (SHG) processes along Y axis.
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