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1550 / 2020-09-29 17:52:02
Optimized Electro-Optical Detection System for a FEL-THz Source
THz，EOsampling,FEL,crystal
Others > Other topics in Electrical Engineering
终稿
Lei Wang / Huazhong University of Science and Technology, 1037 Luoyu Road
xiude tu / Huazhong University of Science and Technology
Sijing He / Huazhong University of Science and Technology
yongqian xiong / Huazhong University of Science and Technology
A detection system based on electro-optical(EO) sampling is designed for the established high-power, wide-band and wave-tunable FEL-THz source at Huazhong University of Science and Technology (HUST). The phase mismatch and dispersion propagation of the femtosecond laser pulse in the crystal are the main reasons that cause the distortion of the EO signal. We theoretically calculate and analyze the mixing process of the probe pulse and THz pulse in the crystal. Calculating the coherence length to find the suitable center wavelength probe for different detected crystals (ZnTe, Gap, GaAs). In addition, our simulation results show that the broadband laser can eliminate the effect caused by phase mismatch between the THz phase velocity and the group velocity of the laser in different crystals (ZnTe, Gap, GaAs). Moreover, the experiment results of 3-mm-thick ZnTe with sampling laser of 100nm bandwidth agree the simulation results well. The research is meaningful for optimizing the EO sampling system in the future.

 
重要日期

  • 会议日期

    11月02日

    2020

    至

    11月04日

    2020

  • 10月27日 2020

    初稿截稿日期

  • 11月03日 2020

    报告提交截止日期

  • 11月04日 2020

    注册截止日期

  • 11月17日 2020

    终稿截稿日期

主办单位
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
承办单位
Huazhong University of Science and Technology
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