YCOB晶体非共线相位匹配技术研究  

Study on Noncollinear Phase Matching in YCOB Crystal

作　　者：孙美智[1] 毕群玉[1] 张福领[1] 康俊[1] 谢兴龙[1] 林尊琪[1] 

机构地区：[1]中国科学院上海光学精密机械研究所国家高功率激光物理实验室,上海201800

出　　处：《光学学报》2011年第1期205-210,共6页Acta Optica Sinica

摘　　要：以中心波长为1053nm的信号光及中心波长为532nm的抽运光光参变放大过程为例,通过数值模拟,详细分析了三硼酸氧钙钇[YCa4O(BO3)3,YCOB]晶体XOY与XOZ主平面内,非共线相位匹配的匹配特点与增益特性。按照相位匹配技术主要参数定义要求,不经近似,通过数值计算,给出了最佳非共线角、相位匹配角、参量带宽、走离角、接收角和有效非线性系数与增益带宽。结果显示,YCOB晶体具有很大的增益带宽与较大的增益,较大的接收角和小的走离角;作为增益介质,不仅可以用于大能量高功率固体激光器,也可以用于几十飞秒量级超短脉冲激光系统。The non-collinear phase matching in XOY and XOZ principal planes of yttrium calcium oxyborate（YCOB） crystal is analyzed in detail with signal pulse of central wavelength at 1053 nm and pump pulse of wavelength at 532 nm.Based on the concepts without numerical approximation,the optimal noncollinear angles,phase-matching angles,parametric bandwidths,walk-off angles,acceptance angles,efficiency coefficients,and gain bandwidths are presented.It is concluded that the YCOB crystals have broad gain bandwidth,high gain,big acceptance angle and small walk-off angle,and they can be utilized as gain media both in high-energy high-power solid-state lasers and tens of femtoseconds ultra-short pulsed laser systems.

关 键 词：非线性光学 光参变啁啾脉冲放大 非共线相位匹配 超宽带增益 三硼酸氧钙钇晶体 

分 类 号：O437.3[机械工程—光学工程] TN242[理学—光学]