Domain switching characteristics and fabrication of periodically poled potassium niobate for second-harmonic generation
Domain switching characteristics and fabrication of periodically poled potassium niobate for second-harmonic generation
复制标题
用于二次谐波产生的周期性极化铌酸钾的磁畴切换特性及制备
DOI：
10.1063/1.1517722
复制
发表时间：
2002
影响因子：
4
通讯作者：
C. Yoon
中科院分区：
文献类型：
--
作者：
J. Kim;C. Yoon
本文报道了用于二次谐波产生的周期极化KNbO_3晶体的180°畴开关特性及其制备。利用二阶非线性光学系数张量的d ~（31）分量，采用改进的三角形脉冲，制备了尺寸为3×4×0.925（a×B×c）mm ~ 3，周期为32.5 μm的高质量周期极化KNbO_3晶体。在波长为1064 nm、脉宽为35 ps的锁模Nd：YAG激光器上实现了高效率的二次谐波输出，最大转换效率为34.8%。在非耗尽泵浦近似下测得的有效非线性系数为5.2pm/V，是理论值的68%。
We report on the 180° domain switching characteristics and fabrication of periodically poled KNbO3 for second-harmonic generation. Using a modified triangular pulse, a periodically poled KNbO3 of very high quality was fabricated with dimensions of 3×4×0.925 (a×b×c) mm3 and a period of 32.5 μm to utilize the d31 component of the second-order nonlinear optical coefficient tensor. An efficient second-harmonic generation of a mode-locked Nd:YAG laser, operated at 1064 nm with a pulse width of 35 ps, was achieved with a maximum conversion efficiency of 34.8%. The effective nonlinear coefficient, measured in the limit of undepleted pump approximation, was 5.2 pm/V, which is 68% of the theoretical value.