中国物理B ›› 2010, Vol. 19 ›› Issue (10): 104207-104207.doi: 10.1088/1674-1056/19/10/104207

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

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

黄丽, 杨延强, 王英惠, 郑植仁, 苏文辉   

  1. Centre for Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2010-02-05 修回日期:2010-04-14 出版日期:2010-10-15 发布日期:2010-10-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 20973050 and 10904023).

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

Huang Li(黄丽), Yang Yan-Qiang(杨延强), Wang Ying-Hui(王英惠), Zheng Zhi-Ren(郑植仁), and Su Wen-Hui(苏文辉)   

  1. Centre for Condensed-Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China
  • Received:2010-02-05 Revised:2010-04-14 Online:2010-10-15 Published:2010-10-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 20973050 and 10904023).

摘要: 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.

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.

Key words: laser-induced transient grating, white-light supercontinuum, chirp characteristic

中图分类号:  (Beam characteristics: profile, intensity, and power; spatial pattern formation)

  • 42.60.Jf
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 42.70.Jk (Polymers and organics) 42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials) 42.79.Dj (Gratings)