蓝光二极管双端抽运Pr:YLF晶体320 nm紫外激光器(特邀)

320 nm ultraviolet laser in blue laser diode double end pumped Pr:YLF crystal(Invited)

设计了一种采用不同波长的蓝光二极管合光作为抽运源并采用双端抽运的方式抽运Pr:YLF晶体320 nm紫外激光器。该激光器结构采用V型折叠腔结构,使用波长分别为444 nm和469 nm、抽运功率分别为3 W和1.4 W的蓝光激光二极管作为抽运源,对12 mm长、0.3%掺杂浓度的Pr:YLF晶体进行抽运,并且使用三硼酸锂晶体作为倍频晶体来实现倍频,匹配方式为I类相位匹配。通过对谐振腔参数进行优化,当5700 mW的抽运功率注入晶体时,输出了1005 mW最大输出功率的320 nm紫外连续激光,光光转换效率约为17.6%。

A 320 nm ultraviolet laser with Pr:YLF crystal was pumped by different wavelength blue laser diode was designed and double end pumping mode was adopted.The structure of the laser is V-folded cavity.A 444 nm blue laser diode with pump power of 3 W and a 469 nm blue laser diode with pump power of 1.4 W was used as pump source.The Pr:YLF crystal has a length of 12 mm and a doping concentration of 0.3%.The phase-matched LBO crystal was used as frequency doubling crystal.By optimizing the resonator parameters,when the incident pump power is 5700 mW,the maximum output power of 320 nm ultraviolet continuous laser with 1005 mW is output,and the optical conversion efficiency is about 17.6%.