Generation of two-color polarization-adjustable radiation pulses for storage ring light source

  • Wei-Hang Liu
  • Yi Wu
  • Yi JiaoEmail author
  • Zheng-He Bai
  • Sheng Wang


To date, two-color pulses are widely used in pump–probe experiments. For a ring-based light source, the power of the spontaneous radiation fluctuates randomly in the longitudinal direction. It is difficult to produce two-color double pulses by optical methods. In this paper, we introduce a method based on the echo-enabled harmonic generation scheme that generates two-color pulses in a storage ring light source. By adopting crossed undulators and a phase shifter, the polarization of the two-color pulses can be easily switched. A numerical simulation based on a diffraction-limited storage ring, the Hefei Advanced Light Source, suggests that the time delay and spectral separation of the two pulses can be adjusted linearly by changing the pulse duration and chirp parameters of the seed laser. A circular polarization degree above 80% could be achieved.


Two-color pulses Echo-enabled harmonic generation Diffraction-limited storage ring Crossed undulators Circular polarization 



The authors thank Guanqun Zhou at IHEP, Tong Zhang at FRIB, Ling Zeng, and Gang Zhao at Peking University for helpful discussions.


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Copyright information

© China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society and Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Wei-Hang Liu
    • 1
    • 2
  • Yi Wu
    • 2
  • Yi Jiao
    • 1
    Email author
  • Zheng-He Bai
    • 3
  • Sheng Wang
    • 4
  1. 1.Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefeiChina
  4. 4.China Spallation Neutron Source, Institute of High Energy PhysicsChinese Academy of SciencesDongguanChina

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