中国物理B ›› 2020, Vol. 29 ›› Issue (1): 14212-014212.doi: 10.1088/1674-1056/ab5fc7

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Orientation-dependent depolarization of supercontinuum in BaF2 crystal

Zi-Xi Li(李子熙), Cheng Gong(龚成), Tian-Jiao Shao(邵天骄), Lin-Qiang Hua(华林强), Xue-Bin Bian(卞学滨), Xiao-Jun Liu(柳晓军)   

  1. 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2019-09-20 修回日期:2019-11-15 出版日期:2020-01-05 发布日期:2020-01-05
  • 通讯作者: Cheng Gong, Xiao-Jun Liu E-mail:gongcheng@wipm.ac.cn;xjliu@wipm.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11527807, 11674356, 11834015, and 91850121), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21010400), and the Open Fund of the State Key Laboratory of High Field Laser Physics, China.

Orientation-dependent depolarization of supercontinuum in BaF2 crystal

Zi-Xi Li(李子熙)1,2, Cheng Gong(龚成)1, Tian-Jiao Shao(邵天骄)1,2, Lin-Qiang Hua(华林强)1, Xue-Bin Bian(卞学滨)1, Xiao-Jun Liu(柳晓军)1   

  1. 1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-09-20 Revised:2019-11-15 Online:2020-01-05 Published:2020-01-05
  • Contact: Cheng Gong, Xiao-Jun Liu E-mail:gongcheng@wipm.ac.cn;xjliu@wipm.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11527807, 11674356, 11834015, and 91850121), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21010400), and the Open Fund of the State Key Laboratory of High Field Laser Physics, China.

摘要: We present a systematic investigation of the depolarization properties of a supercontinuum accompanied with femtosecond laser filamentation in barium fluoride (BaF2) crystal. It is found that the depolarization of the supercontinuum depends strongly on the crystal orientations with respect to the incident laser polarization. At most crystal orientations, the depolarization of the supercontinuum rises with the increase of the input laser energies and finally saturates. While at 45°, the depolarization of the supercontinuum is not changed and keeps nearly negligible with the increase of the input laser energies. These peculiar depolarization properties of the supercontinuum can be ascribed to the orientation dependence of the cross-polarized wave (XPW) generation and ionization-induced plasma scattering in the BaF2 crystal.

关键词: femtosecond laser filamentation, supercontinuum, depolarization

Abstract: We present a systematic investigation of the depolarization properties of a supercontinuum accompanied with femtosecond laser filamentation in barium fluoride (BaF2) crystal. It is found that the depolarization of the supercontinuum depends strongly on the crystal orientations with respect to the incident laser polarization. At most crystal orientations, the depolarization of the supercontinuum rises with the increase of the input laser energies and finally saturates. While at 45°, the depolarization of the supercontinuum is not changed and keeps nearly negligible with the increase of the input laser energies. These peculiar depolarization properties of the supercontinuum can be ascribed to the orientation dependence of the cross-polarized wave (XPW) generation and ionization-induced plasma scattering in the BaF2 crystal.

Key words: femtosecond laser filamentation, supercontinuum, depolarization

中图分类号:  (Beam trapping, self-focusing and defocusing; self-phase modulation)

  • 42.65.Jx
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 42.65.Sf (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)