Diffraction of white-light supercontinuum by femtosecond laser-induced transient grating in carbon bisulfide

Diffraction of white-light supercontinuum by femtosecond laser-induced transient grating in carbon bisulfide
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二硫化碳中飞秒激光诱导瞬态光栅的白光超连续谱衍射

DOI:
10.1088/1674-1056/19/10/104207
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发表时间:
2010-10
期刊:
影响因子:
1.7
通讯作者:
Su Wen-Hui
Su Wen-Hui
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Huang Li;Yang Yan-Qiang;Wang Ying-Hui;Zheng Zhi-Ren;Su Wen-Hui

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利用飞秒激光在二硫化碳(CS2)介质中产生的瞬态光栅(LITG),研究了800 nm、160 fs脉冲激光在4 mm厚Al2O3晶体中产生的白光超连续谱(SC)的啁啾特性。观察到CS2中fs LITG的SC的两级衍射信号,表明三级过程和五级过程同时存在。实验结果还表明,飞秒瞬态折射率光栅在CS2中的形成主要是由于电子极化过程。
Experiments on fs laser-induced transient grating (LITG) in carbon bisulfide (CS2) are carried out to explore the chirp characteristics of a white-light supercontinuum (SC) generated by a 800-nm, 160-fs laser pulse in a 4-mm thick Al2O3 crystal. Two orders of diffraction signals of SC by fs LITG in CS2 are observed, demonstrating that both the third-order process and the fifth-order process are present simultaneously. The experimental results also imply that the formation of an fs transient refractive-index grating in CS2 is mainly due to the electronic polarization process.
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