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中文摘要：
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。
英文摘要：
In order to obtain new wavelengths and high efficient laser outputs, an external resonator Raman experimental setup was established and the properties of YVO4 crystals were measured. Then, a high optical quality YVO4 crystal with the largest size of Ф28 min×40 mm and a mass of 126 g was grown by Czochralski pulling method. The Raman output properties of YVO4 crystals in the external resonator were researched using a mode-locked Nd：YAG laser with a pulse width of 40 ps as the pump source. The results indicate that the total conversion efficiency for multi-wavelength output has reached 51.4%, and the largest output energy is 2.21 mJ. Moreover,the highest conversion efficiency for the first Stocks Raman output at 1 175 nm is 32%, and the largest output energy is 0.57 mJ. The conversion efficiency for the second Stocks Raman output at 1 313 nm is 12.3%, and the largest output energy is 0.36 mJ. These results reported here show that the external resonator structure can improve the Raman performance of YVO4 crystals evidently.
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