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Chinese Optics Letters, Volume. 16, Issue 9, 090401(2018)

A proposed approach for detecting terahertz pulses by using double few-cycle laser pulses with opposite carrier envelope phases

Kejia Wang1,2, Xinyang Gu1, Zhenwei Zhang2, Zhengang Yang1, Jinsong Liu1、*, and Shenglie Wang1、**
Author Affiliations
  • 1Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2Beijing Advanced Innovation Center for Imaging Technology and Key Laboratory of Terahertz Optoelectronics (MoE), Department of Physics, Capital Normal University, Beijing 100048, China
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    (a) The calculated SH intensity without the THz field I2ω0ω0 as the function of the time interval Δt and the laser pulse ϕCEP when W=30 μJ; (b) the SH intensity with the THz field I2ω0ω0+T versus the CEP and Δt; (c) the increment of SH intensities due to the THz signals I2ω0T; (d) the detected THz signals for different values of CEP; (e) the peak and valley values of the detected THz waveforms versus few-cycle lasers’ CEP.

    Fig. 1. (a) The calculated SH intensity without the THz field I2ω0ω0 as the function of the time interval Δt and the laser pulse ϕCEP when W=30  μJ; (b) the SH intensity with the THz field I2ω0ω0+T versus the CEP and Δt; (c) the increment of SH intensities due to the THz signals I2ω0T; (d) the detected THz signals for different values of CEP; (e) the peak and valley values of the detected THz waveforms versus few-cycle lasers’ CEP.

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    (a) Dependence of SH signal intensity on the THz pulse peak field with probe pulses of some special CEP points relative to the optimum one. (b) The subtraction results of the curves in (a).

    Fig. 2. (a) Dependence of SH signal intensity on the THz pulse peak field with probe pulses of some special CEP points relative to the optimum one. (b) The subtraction results of the curves in (a).

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    (a) The THz SH signal waveforms detected by probe pulses when the amount of fluctuations is 1% of ϕCEPOPT; (b) the difference signal waveform and the original THz waveform; (c) the THz spectrum from the Fourier transform of the THz waveforms in (b); (d) the THz SH signal waveforms detected by the probe pulses when the amount of fluctuations is 5% of ϕCEPOPT; (e) the difference signal waveform and the original THz waveform; (f) the THz spectrum from the Fourier transform of THz waveforms in (e).

    Fig. 3. (a) The THz SH signal waveforms detected by probe pulses when the amount of fluctuations is 1% of ϕCEPOPT; (b) the difference signal waveform and the original THz waveform; (c) the THz spectrum from the Fourier transform of the THz waveforms in (b); (d) the THz SH signal waveforms detected by the probe pulses when the amount of fluctuations is 5% of ϕCEPOPT; (e) the difference signal waveform and the original THz waveform; (f) the THz spectrum from the Fourier transform of THz waveforms in (e).

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    Proposed experimental scheme for the coherent detection of a THz pulse via using two few-cycle laser pulses.

    Fig. 4. Proposed experimental scheme for the coherent detection of a THz pulse via using two few-cycle laser pulses.

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    Kejia Wang, Xinyang Gu, Zhenwei Zhang, Zhengang Yang, Jinsong Liu, Shenglie Wang, "A proposed approach for detecting terahertz pulses by using double few-cycle laser pulses with opposite carrier envelope phases," Chin. Opt. Lett. 16, 090401 (2018)

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    Paper Information

    Category: Detectors

    Received: May. 25, 2018

    Accepted: Jul. 19, 2018

    Published Online: Sep. 6, 2018

    The Author Email: Jinsong Liu (jsliu4508@vip.sina.com), Shenglie Wang (wsl@excellaser.com.cn)

    DOI:10.3788/COL201816.090401

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology