摘要
通过1064 nm激光抽运Ba WO4晶体的拉曼技术,获得了1103 nm的拉曼光输出。尺寸5 mm×5 mm×46 mm的Ba WO4晶体按X(ZZ)X配置,实现了332 cm-1频移的受激拉曼散射。在激光二极管抽运功率为7.55 W,声光Q开关工作频率为17 kHz的条件下,获得平均功率为1.23 W的拉曼光输出,光-光转换效率达到16.3%。此时得到的拉曼光脉冲宽度为27 ns,相应的峰值功率为2.6 kW。光束质量因子在两个正交方向上分别为2.0±0.2和1.8±0.2。同时,估算了此时Ba WO4晶体的热透镜焦距,其值为-1100 mm。
A 1103-nm BaWO4 Raman laser is demonstrated with a 1064 nm pump laser.A 5 mm×5 mm×46 mm BaWO4 crystal with scattering geometry X（ZZ）X configuration is employed as the active medium and its 332 cm-1 Raman mode is accomplished.At an incident pump power of 7.55 W,the first-Stokes power of 1.23 W at 1103.2 nm is obtained at a repetition rate of 17 kHz,corresponding to an optical-to-optical conversion efficiency of 16.3%.The pulse width of Raman laser is measured to be 27 ns and the peak power is 2.6 kW.The beam quality factors M2 in the two orthogonal directions are 2.0±0.2 and 1.8±0.2,respectively.The thermal focal length of the BaWO4 crystal is estimated to be-1100 mm under this condition.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第7期31-35,共5页
Chinese Journal of Lasers
基金
国家自然科学基金(60908010)资助课题
