Heterodyne detection with mismatch correction based on array detector

Dong, Hongzhou; Li, Guoqiang; Yang, Renqiang; Yang, Chunping; Ao, Mingwu

doi:10.1016/j.optcom.2016.03.003

Cited by 14 publications

(3 citation statements)

References 15 publications

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“…phase noise suppression by post-processing algorithms to compensate for the phase of the heterodyne photocurrent generated by each detector. This scheme is more for the suppression of phase noise caused by the spatial phase of the target echo not coinciding with the LO light [12,18,19,[24][25][26][27][28][29]. However, the suppression of phase noise that changes rapidly over time due to rapid changes in the target surface is not satisfactory.…”

Section: While For the Case Ofmentioning

confidence: 99%

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Laser Heterodyne Detection Based on Photon Time–Domain Differential Detection Avoiding the Effect of Decoherence Phase Noise

Guan,

Zhang,

Jia

et al. 2023

Sensors

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Laser heterodyne detection (LHD) is a key velocimetry technique that provides better accuracy and sensitivity than direct laser detection. However, random phase noise can be introduced by the surface topography of the moving target undulation or atmospheric turbulence during transmission. The random phase noise causes the target echo to undergo decoherence, resulting in degradation of the signal-to-noise ratio (SNR). Here, we propose a novel LHD method based on photon time–domain differential detection. It can infer the heterodyne spectrum of the target echo and the local oscillator light from the time intervals of the photon arrival. The time interval statistic is a relative quantity, which can effectively avoid the effect of random phase noise in LHD. With our method, the SNR of LHD can be improved in application scenarios where the target echo is decoherent. We developed a complete solution model for acquiring the heterodyne spectrum based on photon time–domain differential detection and performed proof-of-principle experiments. The experimental results show that in the presence of random phase noise, the SNR and velocity measurement error of our method are significantly better than that of the conventional method, and the larger the phase noise is, the more the SNR and velocity measurement error of our method are improved. Moreover, along with the increase in phase noise, the SNR of our method is basically unchanged, which also indicates that our method is not affected by random phase noise. This advantage is significant for photon-level weak echoes that require long detection times to be detected.

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Section: While For the Case Ofmentioning

confidence: 99%

“…The random phase noise eventually leads to decoherence of the target echo [8,17]. In this case, the random phase noise of the target echo will cause the heterodyne photocurrents in the conventional LHD method to cancel each other out [18,19]. The SNR of the conventional LHD method will be reduced.…”

Section: Introductionmentioning

confidence: 99%

Laser Heterodyne Detection Based on Photon Time–Domain Differential Detection Avoiding the Effect of Decoherence Phase Noise

Guan,

Zhang,

Jia

et al. 2023

Sensors

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“…In Ref. [16], a novel heterodyne system with two on-off controllers was designed. Consequently, the mismatch magnitude of the field distributions of the signal and LO beams could be calculated by relatively simple calculations.…”

Section: Modeling Heterodyne Efficiency For the Array Detector Systemmentioning

confidence: 99%

Modeling the Heterodyne Efficiency of Array Detector Systems in the Presence of Target Speckle

et al. 2019

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To solve the speckle effect problem in heterodyne detection, an array detector is proposed; heterodyne efficiency is modeled by accounting for speckle and using an additional parameter to simulate coherent summation processing. Heterodyne efficiency is derived by mixing a Monte Carlo simulated speckle field with a planar local oscillator field on a photodetector surface to evaluate the array detector performance at improving signalto-noise ratio (SNR) of the coherent optical system. From the simulation results, the array detector is shown to effectively improve the SNR of the heterodyne system. For low SNR, the heterodyne efficiency of an N × N array detector increases linearly with N.

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Greedy algorithm-based compensation for target speckle phase in heterodyne detection

Feng

Cao

et al. 2021

Infrared Physics & Technology

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Heterodyne detection with mismatch correction based on array detector

Cited by 14 publications

References 15 publications

Laser Heterodyne Detection Based on Photon Time–Domain Differential Detection Avoiding the Effect of Decoherence Phase Noise

Laser Heterodyne Detection Based on Photon Time–Domain Differential Detection Avoiding the Effect of Decoherence Phase Noise

Modeling the Heterodyne Efficiency of Array Detector Systems in the Presence of Target Speckle

Greedy algorithm-based compensation for target speckle phase in heterodyne detection

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