从非线性光学理论出发,数值计算了LBO晶体Ⅱ类相位匹配1064 nm光波倍频的走离角及互作用长度.在全匹配角范围内,1064 nm慢、快两光间夹角的范围是0~1.0°,θ≈0°.φ≈90°时,夹角为0°;θ≈45°,φ≈55°时,最大夹角约为1.0°.慢、快两基频光光斑线度相同时,波矢沿θ≈0°,φ≈88°方向入射时,其互作用长度最大.
From nonlinear optics theory, type Ⅱ frequency-doubling walk-off angle and interaction length of LBO crystal whose fundamental frequency wavelength is at 1064 nm were respectively calculated with numerical method . In the range of whole phase-matching angle, the angle range between the slow and the fast lights of 1064 nm is 0~1.0°. θ≈0°,φ≈90°, the angle is 0°;θ≈45°,φ≈55°, the maximum angle is approximately 1.0°. When the light-spot dimensions of slow and the fast lights are the same and wave vector incidents along the direction (θ≈0°,φ≈88°), the interactional length is the maximum.
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