Determination of the optimum phase-matching directions for the self-frequency conversion of Nd : GdCOB and Nd : YCOB crystals

作者：Chen XY^*; Huang ML; Luo ZD; Huang YD

来源：Optics Communications, 2001, 196(1-6): 299-307.

DOI：10.1016/S0030-4018(01)01379-7

• self-frequency conversion
• Nd : GdCOB
• Nd : YCOB
• phase matching

We report on the nonlinear optical properties of Nd:Ca4GdO(BO3)(3) (Nd:GdCOB) and Nd:Ca4YO(BO3)(3) (Nd:-YCOB) biaxial crystals by theoretical calculation. The phase-matching curves for the self-frequency conversion generation of both crystals are presented. The dependence of the effective nonlinear coefficients and walk-off angles on different phase-matching directions are discussed. The results show that the optimum type-I phase-matching directions for the self-frequency doubling and self-sum-frequency mixing lasers are not in the principal planes but are located respectively in the directions (theta = 67.1 degrees, phi = 132.35 degrees) and (theta = 68.75 degrees, phi = 118.1 degrees) for Nd:GdCOB, and (theta = 66.5 degrees, phi = 143.4 degrees) and (theta = 65.9 degrees, phi = 134.1 degrees) for Nd:YCOB.

• 出版日期2001-9-1
• 单位中国科学院福建物质结构研究所