中国激光, 2014, 41 (3): 0302008, 网络出版: 2014-02-26
外腔抽运Sr:WO4反斯托克斯拉曼激光器 下载: 536次
Extracavity Pumped Sr:WO4 Anti-Stokes Raman Lasers
激光器 反斯托克斯激光器 四波混频 Sr:WO4晶体 相位匹配 受激拉曼散射 lasers anti-Stokes lasers four-wave mixing Sr:WO4 crystal phase matching stimulated Raman scattering
摘要
报道了外腔抽运的969 nm Sr:WO4反斯托克斯拉曼激光器的特性。利用主动调Q Nd:YAG激光器产生的1064 nm激光作为抽运源,Sr:WO4拉曼谐振腔的光轴与抽运光的传播方向偏离一个角度,实现了抽运光、一阶斯托克斯光和一阶反斯托克斯光之间的非共线相位匹配,得到了一阶反斯托克斯光和一至三阶斯托克斯光的输出,测量了输出激光的脉冲能量、时间和光谱特性。当抽运光能量为120 mJ时获得的969 nm反斯托克斯光的最大输出能量为0.74 mJ,脉冲宽度为3.9 ns。同时,获得的斯托克斯光的总能量为23.9 mJ,其中1323 nm二阶斯托克斯光的输出能量为19.6 mJ。由抽运光向斯托克斯光和反斯托克斯光转换的总效率为20.5%。
Abstract
The characteristics of an extracavity pumped Sr:WO4 anti-Stokes Raman lasers at 969 nm are studied. The Sr:WO4 Raman resonator is pumped by an actively Q-switched Nd:YAG laser at 1064 nm with its axis tilted from the pumping laser direction. The non-collinear phase matching between the pumping radiation, the generated first Stokes and the first anti-Stokes radiations are achieved. Besides the first anti-Stokes laser radiation, three orders of Stokes laser radiations are generated simultaneously. The output energy, temporal and spectral information of the output laser radiations are investigated. At the highest pumping laser energy of 120 mJ, the highest energy of the anti-Stokes radiation is 0.74 mJ with the pulse width of 3.9 ns. Meanwhile, the total output energy of the Stokes radiations is 23.9 mJ with 19.6 mJ of 1323 nm second Stokes component. The conversion efficiency from the pumping radiation to the Stokes and anti-Stokes radiations is 20.5%.
王聪, 张行愚, 王青圃, 丛振华, 刘兆军, 韦卫, 陈晓寒, 李平, 涂朝阳. 外腔抽运Sr:WO4反斯托克斯拉曼激光器[J]. 中国激光, 2014, 41(3): 0302008. Wang Cong, Zhang Xingyu, Wang Qingpu, Cong Zhenhua, Liu Zhaojun, Wei Wei, Chen Xiaohan, Li Ping, Tu Chaoyang. Extracavity Pumped Sr:WO4 Anti-Stokes Raman Lasers[J]. Chinese Journal of Lasers, 2014, 41(3): 0302008.