基于RTP晶体的271 cm^(−1)拉曼频移五阶斯托克斯激光  

Utilizing RTP crystal to generate fifth-order Stokes laser emissionwith 271 cm^(−1)Raman shift

作　　者：王京[1] 金鑫鑫 王严毅 王鸿雁 李志红 段延敏[1] 朱海永[1] Wang Jing;Jin Xinxin;Wang Yanyi;Wang Hongyan;Li Zhihong;Duan Yanmin;Zhu Haiyong(Wenzhou Key Laboratory of Micro-Nano Optoelectronic Devices,College of Electrical and ElectronicEngineering,Wenzhou University,Wenzhou 325035,China;Crystech Inc,Qingdao 266100,China)

机构地区：[1]温州大学电气与电子工程学院,温州市微纳光电器件重点实验室,浙江温州325035 [2]青岛海泰光电技术有限公司,山东青岛266100

出　　处：《强激光与粒子束》2024年第6期54-58,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(62075167、62275200、62205251);温州市基础性科研项目(G20220014);温州大学硕士研究生创新基金项目(3162023003067)。

摘　　要：报道了端面泵浦被动调Q激光驱动RbTiOPO4晶体拉曼实现271 cm^(−1)频移高阶斯托克斯激光输出。采用Nd:YAG与Cr4+:YAG键合设计来降低腔内的损耗,并使激光系统更紧凑,从而提升腔内光子功率密度,有利于拉曼频移向高阶斯托克斯激光转换。设计不同频移的一阶斯托克斯激光对应在不同腔内振荡,利用与基频光模式匹配的差异来抑制687 cm^(−1)频移的一阶斯托克斯激光,最终获得较纯的271 cm^(−1)频移的五阶斯托克斯激光输出。在泵浦功率8.1 W下,获得了平均输出功率230 mW的1244 nm波长激光,对应的脉冲宽度和重复频率分别为2.9 ns和11.7 kHz。1244 nm波段的激光正好与水中OH−1吸收峰对应,在地表植被和行星水含量的检测等领域有重要的应用。The RbTiOPO4 crystal Raman emission at high-order Stokes with 271 cm^(−1)shift driven by an end-pumped passively Q-switched laser was demonstrated.The Nd:YAG and Cr4+:YAG bonding design was used toreduce the intracavity loss and make the laser system compact,so as to raise the intracavity photon density,whichproved helpful for the conversion of Raman shift to high-order Stokes light.The first-Stokes laser with differentRaman shifts is designed to oscillate in different cavities,and the first-Stokes laser with 687 cm^(−1)shift is suppressed byusing the difference in cavity mode matching with the fundamental laser,and the fifth-order Stokes laser with 271 cm^(−1)shift is obtained.Under the pump power of 8.1 W,a 1244 nm wavelength laser with an average output power of 230mW was obtained,and the corresponding pulse width and pulse frequency repetition were 2.9 ns and 11.7 kHz,respectively.The 1244 nm laser wavelength perfectly matched the OH−1 absorption peak in water,which could havesignificant applications in fields such as surface vegetation and planetary water detection.

关 键 词：RTP晶体 拉曼激光 被动调Q 五阶斯托克斯光 

分 类 号：TN248.1[电子电信—物理电子学]