PPKTP、LBO和BiBO晶体在397.5 nm处高效倍频的比较和表征
Comparison and characterization of efficient frequency doubling at 397.5 nm with PPKTP, LBO and BiBO crystals
摘要：
在分别采用LiB 3 O 5（LBO）、BiB 3 O 6（BiBO）和周期性极化KTiOPO 4（PPKTP）晶体的蝴蝶结型增强四镜环形腔中，对795 nm连续波钛宝石激光进行了倍频。对不同非线性晶体的397.5nm紫外光输出功率、光束质量、稳定性等特性进行了研究和比较。对于PPKTP晶体，从795 nm模匹配基频光功率191 mW到397.5 nm紫外光输出功率111 mW，最高倍频效率达到58.1%。对于LBO晶体，在1.34W的795 nm模匹配功率下，获得了770 mW的397.5nm紫外光输出，倍频效率为57.4%。对于BiBO晶体，在795 nm模匹配功率为323 mW时，获得了116 mW的397.5 nm紫外光输出，倍频效率为35.9%.产生的紫外辐射在量子物理领域有潜在的应用
英文摘要：
A continuous-wave Ti:sapphire laser at 795 nm is frequency doubled in a bow-tie type enhancement four-mirror ring cavity with LiB3O5 (LBO), BiB3O6 (BiBO), and periodically polled KTiOPO4 (PPKTP) crystals, respectively. The properties of 397.5 nm ultra-violet (UV) output power, beam quality, stability for these different nonlinear crystals are investigated and compared. For PPKTP crystal, the highest doubling efficiency of 58.1% is achieved from 191 mW of 795 nm mode-matched fundamental power to 111 mW of 397.5 nm UV output. For LBO crystal, with 1.34 W of mode-matched 795 nm power, 770 mW of 397.5 nm UV output is achieved, implying a doubling efficiency of 57.4%. For BiBO crystal, with 323 mW of mode-matched 795 nm power, 116 mW of 397.5 nm UV output is achieved, leading to a doubling efficiency of 35.9%. The generated UV radiation has potential applications in the fields of quantum physics
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