中国物理B ›› 2019, Vol. 28 ›› Issue (4): 44206-044206.doi: 10.1088/1674-1056/28/4/044206

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

Femtosecond enhancement cavity with kilowatt average power

Jin Zhang(张津), Lin-Qiang Hua(华林强), Shao-Gang Yu(余少刚), Zhong Chen(陈忠), 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:2019-01-02 修回日期:2019-01-28 出版日期:2019-04-05 发布日期:2019-04-05
  • 通讯作者: Lin-Qiang Hua, Xiao-Jun Liu E-mail:hualq@wipm.ac.cn;xjliu@wipm.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11674356 and 11527807) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21010400).

Femtosecond enhancement cavity with kilowatt average power

Jin Zhang(张津)1,2, Lin-Qiang Hua(华林强)1, Shao-Gang Yu(余少刚)1,2, Zhong Chen(陈忠)1,2, 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:2019-01-02 Revised:2019-01-28 Online:2019-04-05 Published:2019-04-05
  • Contact: Lin-Qiang Hua, Xiao-Jun Liu E-mail:hualq@wipm.ac.cn;xjliu@wipm.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11674356 and 11527807) and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21010400).

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摘要：

Femtosecond enhancement cavity (fsEC) has been proved to be a powerful tool in a diverse range of applications. Here, we report the recent progresses in building an fsEC on kilowatt level average power, with the aim of realization of intracavity high harmonic generation (HHG) and extension of the wavelength of femtosecond optical frequency comb from infrared (IR) to extreme ultraviolet (XUV). Upon mode-matching optimization and cavity length locking, an intracavity average power of 6.08 kW is reached and the corresponding buildup is 225. After introducing noble gas of Xe into the focus region, clear sign of plasma has been observed. The generated HHG is also coupled out by a sapphire plate placed at Brewster's angle for the fundamental laser. Our work paves the way for the realization of an XUV comb.

关键词: femtosecond enhancement cavity, extreme ultraviolet optical frequency comb, high-order harmonic generation

Abstract:

Femtosecond enhancement cavity (fsEC) has been proved to be a powerful tool in a diverse range of applications. Here, we report the recent progresses in building an fsEC on kilowatt level average power, with the aim of realization of intracavity high harmonic generation (HHG) and extension of the wavelength of femtosecond optical frequency comb from infrared (IR) to extreme ultraviolet (XUV). Upon mode-matching optimization and cavity length locking, an intracavity average power of 6.08 kW is reached and the corresponding buildup is 225. After introducing noble gas of Xe into the focus region, clear sign of plasma has been observed. The generated HHG is also coupled out by a sapphire plate placed at Brewster's angle for the fundamental laser. Our work paves the way for the realization of an XUV comb.

Key words: femtosecond enhancement cavity, extreme ultraviolet optical frequency comb, high-order harmonic generation

中图分类号:  (Resonators, cavities, amplifiers, arrays, and rings)

  • 42.60.Da
42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)