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Chinese Optics Letters, Volume. 23, Issue 7, 073901(2025)

Improving accuracy through double acousto-optic modulators in photonics-assisted mmWave heterodyne interferometric sensing

Yiwen Lu1, Tong Yang1, Qizhuang Cen2, Xinpeng Wang1, Chong Liu1, Feifei Yin1, Kun Xu1, Ming Li2, and Yitang Dai1、*
Author Affiliations
  • 1State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 2Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
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    References (21)
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    Figures & Tables(7)
    Schematic diagram of photonics-assisted mmWave heterodyne interferometric sensing in different AOM configurations. (a) Single AOM, (b) double AOM cascading, and (c) double AOM parallel. DAQ, data acquisition. The corresponding optical sidebands on each interference arm are also displayed.

    Fig. 1. Schematic diagram of photonics-assisted mmWave heterodyne interferometric sensing in different AOM configurations. (a) Single AOM, (b) double AOM cascading, and (c) double AOM parallel. DAQ, data acquisition. The corresponding optical sidebands on each interference arm are also displayed.

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    Theoretical simulation of zero-order perturbation in different AOM configurations.

    Fig. 2. Theoretical simulation of zero-order perturbation in different AOM configurations.

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    Noise floor deterioration using double AOMs.

    Fig. 3. Noise floor deterioration using double AOMs.

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    Experimental setup of photonics-assisted mmWave heterodyne interferometric sensing in different AOM configurations. (a) Single AOM, (b) double AOM cascading, and (c) double AOM parallel. EDFA, erbium-doped fiber amplifier; PC, polarization controller; PM, phase modulator; WS, waveshaper; PD, photodetector; EA, electrical amplifier; BPF, band-pass filter; LPF, low-pass filter.

    Fig. 4. Experimental setup of photonics-assisted mmWave heterodyne interferometric sensing in different AOM configurations. (a) Single AOM, (b) double AOM cascading, and (c) double AOM parallel. EDFA, erbium-doped fiber amplifier; PC, polarization controller; PM, phase modulator; WS, waveshaper; PD, photodetector; EA, electrical amplifier; BPF, band-pass filter; LPF, low-pass filter.

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    The noise floor and mmWave contribution.

    Fig. 5. The noise floor and mmWave contribution.

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    Experimental results of zero-order perturbation in different AOM configurations. (a) Waveform in time domain. (b) Normalized power spectrum.

    Fig. 6. Experimental results of zero-order perturbation in different AOM configurations. (a) Waveform in time domain. (b) Normalized power spectrum.

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    • Table 1. Comparison With Recent Similar Works

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      Table 1. Comparison With Recent Similar Works

      MeasurandOptical sourceSensitivity (depend on)Noise floor (dBc/Hz)
      Displacement[19]Two close frequencies from two laser sourcesCentral frequency−87
      Vibration[20]Two close frequencies from broadband lightCentral frequency−88
      Strain rate[21]Broadband lightCentral frequency−105
      Acoustic[17]Two narrow-linewidth tunable lasersFrequency interval−105
      Delay (This work)Photonics-assisted mmWaveFrequency interval−110
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    Yiwen Lu, Tong Yang, Qizhuang Cen, Xinpeng Wang, Chong Liu, Feifei Yin, Kun Xu, Ming Li, Yitang Dai, "Improving accuracy through double acousto-optic modulators in photonics-assisted mmWave heterodyne interferometric sensing," Chin. Opt. Lett. 23, 073901 (2025)

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    Paper Information

    Category: Microwave Photonics

    Received: Dec. 17, 2024

    Accepted: Feb. 11, 2025

    Published Online: Jun. 4, 2025

    The Author Email: Yitang Dai (ytdai@bupt.edu.cn)

    DOI:10.3788/COL202523.073901

    CSTR:32184.14.COL202523.073901

    Topics

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