CLBO晶体和频产生深紫外激光的理论计算与实验结果  

Theoretical Calculation and Experimental Result of Deep-ultraviolet Laser Generated by Sum-frequency Generation in CLBO Crystal

作　　者：林彦[1] 霍玉晶[1] 何淑芳[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《人工晶体学报》2010年第1期125-129,134,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金重点项目(No.50132010)

摘　　要：本文介绍了深紫外非线性光学晶体CLBO的光学特性,推导出了CLBO晶体和频时的相位匹配角、有效非线性系数、走离角、允许角宽度和允许温度范围的公式,并进行了详细计算。根据计算结果可知,CLBO晶体和频可以实现深紫外激光的有效输出,并且具有大的有效非线性系数、小的走离角、大的允许角宽度和允许温度范围。由此设计了1064nm近红外激光和238.7nm紫外激光通过CLBO晶体和频产生195nm深紫外激光的系统方案,并在实验中实现了平均功率217μW、重复频率10Hz的195nm激光的稳定运转。The optical properties of deep-ultraviolet nonlinear optical crystal CLBO were introduced.Formulae of phase-matching angle,efficient nonlinear coefficient,walk-off angle,and acceptance angle and temperature range were derived and relevant data were calculated in detail.According to these data,it is proved that deep-ultraviolet laser can be generated by sum-frequency generation in CLBO with large efficient nonlinear coefficient,small walk-off angle,and large acceptance angle and temperature range.A scheme of sum-frequency generation by mixing 1064 nm near-infrared laser and 238.7 nm ultraviolet laser in a CLBO crystal was designed,and steady operation at 195 nm was achieved with 217 μW average power at 10 Hz in experiment.

关 键 词：CLBO晶体 深紫外激光 和频 

分 类 号：TN248.1[电子电信—物理电子学]