Generation of tunable ultrafast ultraviolet third harmonic by collinear compensation of group-velocity mismatch

Generation of tunable ultrafast ultraviolet third harmonic by collinear compensation of group-velocity mismatch
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通过群速度失配的共线补偿产生可调谐超快紫外三次谐波

DOI:
10.1016/j.optcom.2015.04.085
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发表时间:
2015-10
影响因子:
2.4
通讯作者:
Lin, Wenxiong
Lin, Wenxiong
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Deng, Jing;Dai, Shutao;Weng, Wen;Lin, Wenxiong

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我们展示了一种高效的三倍频配置的钛蓝宝石放大器系统,用于波长可调的超快紫外激光产生。采用一种新的非线性晶体Ba1−xB2−y−zo4sixalygaz2和一种ii型相匹配的β- bab2o4晶体分别用于二次谐波和第三次谐波的产生。采用65°切割、3mm长β- bab2o4晶体作为共线群速度补偿板,显著提高了三倍频转换效率。制备了波长为256.7 ~ 276.7 nm的可调谐紫外脉冲,其最大平均功率为212 mW,基频功率为2.5 W时产生三次谐波的转换效率为8.48%。三次谐波脉冲能量最大可达0.21 mJ,在266.7 nm处峰值功率在1 GW以上。
We demonstrate a high efficient frequency tripling configuration of Ti: sapphire amplifier system for wavelength-tunable ultrafast ultraviolet laser generation. A new nonlinear crystal Ba1−xB2−y−zO4SixAlyGazand a type-II phase-matchedβ-BaB2O4crystal are employed for the second and the third harmonic generation, respectively. Significant improvement in conversion efficiency of frequency tripling is achieved by using a 65°-cut, 3-mm-longβ-BaB2O4crystal as the collinear group velocity compensation plate. Tunable ultraviolet pulse within the wavelength range from 256.7 to 276.7 nm have been produced, with a maximum average power of 212 mW, corresponding to a conversion efficiency of 8.48% for the third harmonic generation with 2.5 W fundamental power. The maximum pulse energy of the third harmonic is up to 0.21 mJ and it is estimated that the peak power is above 1 GW at 266.7 nm.
DOI: 10.1364/ol.16.001729
发表时间: 1991-11
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影响因子: 1.5
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