Diffraction of white-light supercontinuum by femtosecond laser-induced transient grating in carbon bisulfide |
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Authors: | Huang Li Yang Yan-Qiang Wang Ying-Hui Zheng Zhi-Ren and Su Wen-Hui |
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Institution: | Centre for Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China |
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Abstract: | 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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Keywords: | laser-induced transient grating white-light supercontinuum chirp characteristic |
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