硼磷酸盐晶体BaBPO_5的非线性光学系数研究(英文)

Determination of the Nonlinear Optical Coefficients of the Borophosphate Crystal BaBPO_5

用Maker条纹方法测量了硼磷酸盐晶体BaBPO5的非线性光学系数d11(BaBPO5) =(0.439±0.002)d36(KH2PO4),d12(BaBPO5) =(0.425±0.008)d36(KH2PO4),相应的相干长度为:l11=16.985±0.301μm,l12=16.972±0.304μm。确定了非线性光学系数的相对符号,d11(BaBPO5)和d12(BaBPO5)符号相反。BaBPO5晶体激光损伤阈值大于900 MW/cm2。

The nonlinear optical coefficients of the borophosphate crystal BaBPO5 were measured by the Maker fringe technique： d11（BaBPO5）=（0.439±0.002）d36（KH2PO4）, d12（BaBPO5）=（0.425±0.008）d36（KH2PO4）, at the 1064nm fundamental light. The experimental results were agreement with the theoretical ones well. And the coherent lengths of BaBPO5 were calculated： l11=16.985±0.301μm,l12=16.972±0.304μm.The relative sign of the coefficients and the coherent lengths of BaBPO5 crystal were determined. And the optical damage threshold was estimated for the laser beam （10ns pulse, 1064nm and 10Hz）, which is more than 900 MW/cm^2.