中国物理B ›› 2017, Vol. 26 ›› Issue (7): 74213-074213.doi: 10.1088/1674-1056/26/7/074213

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

Intense supercontinuum generation in the near-ultraviolet range from a 400-nm femtosecond laser filament array in fused silica

Dongwei Li(李东伟), Lanzhi Zhang(张兰芝), Saba Zafar, He Song(宋鹤), Zuoqiang Hao(郝作强), Tingting Xi(奚婷婷), Xun Gao(高勋), Jingquan Lin(林景全)   

  1. 1 School of Science, Changchun University of Science and Technology, Changchun 130022, China;
    2 School of Physics, University of Chinese Academy of Sciences, Beijing 101407, China
  • 收稿日期:2017-02-18 修回日期:2017-03-18 出版日期:2017-07-05 发布日期:2017-07-05
  • 通讯作者: Zuoqiang Hao, Tingting Xi E-mail:zqhao@cust.edu.cn;ttxi@ucas.ac.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No.2013CB922404),the National Natural Science Foundation of China (Grant Nos.11274053,11474039,11474040,and 11004240),the Science and Technology Department of Jilin Province,China (Grant No.20170519018JH),and the Innovation Fund of Changchun University of Science and Technology,China (Grant No.XJJLG-2016-02).

Intense supercontinuum generation in the near-ultraviolet range from a 400-nm femtosecond laser filament array in fused silica

Dongwei Li(李东伟)1, Lanzhi Zhang(张兰芝)1, Saba Zafar1, He Song(宋鹤)1, Zuoqiang Hao(郝作强)1, Tingting Xi(奚婷婷)2, Xun Gao(高勋)1, Jingquan Lin(林景全)1   

  1. 1 School of Science, Changchun University of Science and Technology, Changchun 130022, China;
    2 School of Physics, University of Chinese Academy of Sciences, Beijing 101407, China
  • Received:2017-02-18 Revised:2017-03-18 Online:2017-07-05 Published:2017-07-05
  • Contact: Zuoqiang Hao, Tingting Xi E-mail:zqhao@cust.edu.cn;ttxi@ucas.ac.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No.2013CB922404),the National Natural Science Foundation of China (Grant Nos.11274053,11474039,11474040,and 11004240),the Science and Technology Department of Jilin Province,China (Grant No.20170519018JH),and the Innovation Fund of Changchun University of Science and Technology,China (Grant No.XJJLG-2016-02).

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摘要：

An intense supercontinuum (SC) in the near-ultraviolet range is generated from filamentation by focusing a 400-nm laser into fused silica with a microlens array (MLA). The spectrum of the SC is shown to be sensitive to the distance between the MLA and fused silica. In our optimal conditions, the near-ultraviolet SC can cover a range of 350–600 nm, where a bandwidth of approximately 55 nm above the 1μ J/nm spectral energy density and 20 nm bandwidth with tens ofμJ/nm are achieved. In addition, the energy conversion efficiency of the 400 nm laser for SC generation is further analyzed. A maximum conversion efficiency of 66% is obtained when the entrance face of fused silica is set around the focus of the MLA.

关键词: filamentation, supercontinuum generation, microlens array, fused silica

Abstract:

An intense supercontinuum (SC) in the near-ultraviolet range is generated from filamentation by focusing a 400-nm laser into fused silica with a microlens array (MLA). The spectrum of the SC is shown to be sensitive to the distance between the MLA and fused silica. In our optimal conditions, the near-ultraviolet SC can cover a range of 350–600 nm, where a bandwidth of approximately 55 nm above the 1μ J/nm spectral energy density and 20 nm bandwidth with tens ofμJ/nm are achieved. In addition, the energy conversion efficiency of the 400 nm laser for SC generation is further analyzed. A maximum conversion efficiency of 66% is obtained when the entrance face of fused silica is set around the focus of the MLA.

Key words: filamentation, supercontinuum generation, microlens array, fused silica

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

  • 42.65.Jx
42.65.-k (Nonlinear optics) 42.72.Bj (Visible and ultraviolet sources)