Cui Zijian, Han Lu, Wang Chao, Sun Mingying, Liu De'an, Zhu Jianqiang
Opt Lett. 2022 Jun 15;47(12):2947-2950. doi: 10.1364/OL.458952.
We systematically demonstrated the angular and temperature acceptances of noncritical phase-matching (NCPM) fourth- and fifth-harmonic generation (FHG and FiHG) of a 1077 nm laser in NHHPO (ADP), KHPO (KDP), and KDPO (DKDP) crystals. In this work, a new, to the best of our knowledge, laser frequency with a wavelength of 1077 nm was generated by optical parametric amplification, in which the pump light (526.3 nm) was generated by the frequency doubling of a Nd:YLF laser (1052.7 nm), and the signal light was a Yb:YAG laser (1029.5 nm). Subsequently, the 1077 nm laser was used as the fundamental wave for FHG and FiHG to obtain a deep-ultraviolet laser source. For ADP and DKDP crystals, NCPM FHG of a 1077 nm laser was realized at 74.0C and 132.5C, respectively, and large angular acceptances of 59.8 and 61.6 mrad were measured. For the FiHG, NCPM was realized in a KDP crystal at 48.5C with an angular acceptance of 56.4 mrad. The results pave the way for high-energy and high-power deep-ultraviolet laser generation using KDP-family crystals under noncryogenic conditions.
我们系统地展示了在磷酸二氢铵（ADP）、磷酸二氢钾（KDP）和磷酸二氘钾（DKDP）晶体中，1077nm激光的非临界相位匹配（NCPM）四次谐波和五次谐波产生（FHG和FiHG）的角度和温度接受度。在这项工作中，据我们所知，通过光学参量放大产生了一种新的波长为1077nm的激光频率，其中泵浦光（526.3nm）由Nd:YLF激光（1052.7nm）倍频产生，信号光为Yb:YAG激光（1029.5nm）。随后，将1077nm激光用作FHG和FiHG的基波，以获得深紫外激光源。对于ADP和DKDP晶体，1077nm激光的NCPM FHG分别在74.0℃和1..5℃实现，并测量到59.8和61.6mrad的大角度接受度。对于FiHG，在KDP晶体中于48.5℃实现了NCPM，角度接受度为56.4mrad。这些结果为在非低温条件下使用KDP族晶体产生高能和高功率深紫外激光铺平了道路。
