论文部分内容阅读
采用自制的795 nm连续单频可调谐钛宝石激光器抽运周期极化磷酸氧钛钾(PPKTP)晶体,通过外腔谐振倍频技术获得了功率为103 m W,倍频转换效率为39.6%、光束质量因子M2<1.43的397.5 nm紫光输出;与角度匹配的三硼酸铋(BIBO)晶体内腔倍频情况相比,紫光与光学参量放大器(OPA)的模式匹配效率由76%提高到了99%以上。同时,在平衡零拍探测系统中,通过在本底光光路中插入与OPA腔型相同的模式清洁器,使得本底光与信号光的空间模式完全相同,从而将两束光的干涉效率提高到了99%以上,提高了平衡零拍系统的探测效率。通过对自制的795 nm和397.5 nm单频激光系统的优化设计,使该光源满足了小型化795 nm连续变量压缩源样机研制的要求。
The self-made 795 nm tunable single-frequency tunable Ti: sapphire laser was used to pump periodically poled potassium titanyl phosphate (PPKTP) crystals. The power of the PPKTP crystal was 103 mW and the octave conversion efficiency was 39.6% The 397.5 nm violet output with a beam quality factor of M2 <1.43 was achieved. The pattern matching efficiency of violet and optical parametric amplifier (OPA) increased from 76% to 99% compared to the case of the angularly matched bismuth triborate (BIBO) the above. In the meantime, in the balanced zero-shot detection system, the space pattern of the background light and the signal light are exactly the same by inserting the same pattern cleaner as the OPA cavity in the background light path so as to improve the interference efficiency of the two beams To more than 99%, improve the balance of zero-shot system detection efficiency. The optimized design of self-made 795 nm and 397.5 nm single-frequency laser systems has made this light source meet the requirements for the development of miniaturized 795 nm continuous variable compression source prototype.