论文部分内容阅读
为了实现新波长、高效率的激光输出,建立了外腔型拉曼实验装置并对YVO4晶体进行了测量。采用提拉法生长了最大尺寸为28 mm×40 mm,质量为126 g的高光学质量YVO4晶体,以脉冲宽度为40 ps的Nd:YAG锁模激光器作为激发源,研究了YVO4晶体的外腔拉曼输出特性。结果显示,该激光器多波长输出的总转换效率达到51.4%,最大输出能量为2.21 mJ;1 175 nm一级斯托克斯拉曼输出的最高转换效率为32%,最大输出能量为0.57 mJ;1 313 nm二级斯托克斯拉曼输出的最高转换效率为12.3%,最大输出能量为0.36 mJ。结果表明,采用外腔型结构可使YVO4晶体的拉曼输出性能显著提高。
In order to realize the new wavelength and high efficiency laser output, an external cavity Raman experiment device was built and YVO4 crystal was measured. A high optical quality YVO4 crystal with a maximum size of 28 mm × 40 mm and a mass of 126 g was grown by Czochralski method. Excited Nd: YAG mode-locked laser with a pulse width of 40 ps, Cavity Raman output characteristics. The results show that the total conversion efficiency of the multiwavelength laser output reaches 51.4% and the maximum output energy is 2.21 mJ; the maximum conversion efficiency of the 1 175 nm first order Stokes Raman output is 32% and the maximum output energy is 0.57 mJ; The maximum conversion efficiency of 1 313 nm second order Stokes Raman output is 12.3% and the maximum output power is 0.36 mJ. The results show that the Raman output of YVO4 crystal can be significantly improved by using the external cavity structure.