Abstract
Large size and high-quality YCa 4 O(BO 3 ) 3 (YCOB) crystal can be grown using the conventional Czochralski pulling method. The theoretical calculations of the effective coefficient (d eff ) and the walk-off angles at 530 nm of YCOB along various phase-matching (PM) directions are reported. The PM direction along (0 = 64.5°, φ = 144.5°) for YCOB crystal has the largest d eff- Second-harmonic generation (SHG) experiments were performed on YCOB crystal along various PM directions. The results show that in 6 mm long YCOB crystal, the SHG conversion efficiency is 39% along the PM direction (θ = 64.5°, φ = 144.5°) at 80 MW/cm 2 input power density, which is larger than that along (0 = 64.5°, φ = 35.5°) and the PM direction in the XZ main plane. The experimental result is in good agreement with the theoretical calculations.
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