基于单块周期极化晶体的级联三倍频蓝光输出技术的研究  

The Study of Cascaded Third-Harmonic-Generation of Blue Laser with a Monolithic Periodically Poled Crystal

作　　者：张旭光 鲁燕华[1] 许夏飞 张雷[1] 任怀瑾[1] 刘芳[1] 孙军[4,5,6] 王卫民 

机构地区：[1]中国工程物理研究院,应用电子学研究所,四川绵阳 [2]中国工程物理研究院,研究生院,北京 [3]中国工程物理研究院,高能激光科学与技术实验室,四川绵阳 [4]南开大学,物理科学学院,天津 [5]南开大学,弱光非线性光子学教育部重点实验室,天津 [6]山西大学,极端光学协同创新中心,山西太原

出　　处：《应用物理》2018年第1期32-38,共7页Applied Physics

基　　金：国家自然科学基金项目(61575099);中国工程物理研究院院长基金(201501023)。

摘　　要：本文对单块周期极化晶体,在同一温度下先后经过倍频(SHG)与和频(SFG)过程实现级联三倍频输出进行了理论与实验研究。通过周期极化晶体的色散方程以及倍频与和频过程需满足的相位匹配条件,发现晶体所需倍频与和频极化周期只与基频光波长和工作温度有关,基频光波长确定后,同一工作温度相对应的倍频极化周期与和频极化周期即可确定。根据计算结果,在一块40 mm长的周期极化铌酸锂(PPLN)晶体上实现了1319 nm的级联三倍频蓝光输出,工作温度55.5℃。Cascaded third-harmonic-generation is realized by second-harmonic-generation (SHG) and sum- frequency-generation (SFG) successively. It can be realized with one monolithic periodically poled crystal at the same temperature. The theoretical and experimental study about this kind of method was introduced in this paper. Through Sellmeier Equation and phase-matching condition, it was found that the poling periods for SHG and SFG are both related to fundamental wavelength and working temperature. The poling periods can be determined after confirming wavelength and temperature. According to our calculation, a 440-nm blue laser was realized by cascaded third- harmonic-generation of 1319-nm laser with a 40-mm-long periodically poled lithium niobate (PPLN) crystal where the working temperature was 55.5?C.

关 键 词：级联三倍频 周期极化晶体 蓝光 

分 类 号：TN2[电子电信—物理电子学]