摘要
设计了蓝光二极管抽运掺镨氟化钇锂(Pr:YLF)腔内倍频348.9nm紫外激光器。激光器采用Z型折叠腔结构,利用45°合光片将抽运功率为1.4W的444nm蓝光和抽运功率为1.5W的469nm蓝光进行激光二极管合光,并将其作为抽运源,抽运长度为5mm、掺杂浓度(质量分数)为0.5%的Pr:YLF晶体。将I类相位匹配的三硼酸锂作为倍频晶体,通过优化谐振腔镜膜系和腔型设计,在抽运功率最大时,获得了最大输出功率为132.2mW、中心波长为348.9nm的连续紫外光输出,抽运光到紫外光的光-光转换效率约为4.5%。
A 348.9 nm intra-cavity frequency-doubling ultraviolet laser in blue laser diode pumped Pr∶YLF crystal is designed, in which a Z-folded cavity structure is adopted. A 444 nm blue laser diode with pump power of 1.4 W and a 469 nm blue laser diode with pump power of 1.5 W obtained are combined by a 45° combiner film as a pump laser for the Pr∶YLF crystal which has a length of 5 mm and a doping concentration (mass fraction) of 0.5%. In addition, the type I phase-matched LBO crystal is chosen for frequency-doubling. By optimizing the resonator mirror coating and structural design, we achieve a continuous ultraviolet laser output with a maximum power of 132.2 mW, a central wavelength of 348.9 nm, and an optical-to-optical conversion efficiency of 4.5% when pump power is the maximum.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2018年第12期13-17,共5页
Chinese Journal of Lasers
基金
长春市科技计划(16SS18)
