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Acta Optica Sinica, Volume. 44, Issue 2, 0207001(2024)

A Multi-Phase Phase-Generated Carrier Demodulation Algorithm for Stability Improvement of Noise Transfer Coefficient for Fiber Optic Hydrophone

Qingkai Hou, Qiong Yao*, Hu Chen, and Shuidong Xiong
Author Affiliations
  • Institue of Deep-Sea Science and Technology, College of Meteorology and Oceanology, National University of Defense Technology, Changsha 410073, Hunan, China
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    Variation curves of noise transfer coefficient CNTF,i with modulation depth C and working point ϕ. (a) Variation curves with C; (b) variation curves with working points ϕ

    Fig. 1. Variation curves of noise transfer coefficient CNTF,i with modulation depth C and working point ϕ. (a) Variation curves with C; (b) variation curves with working points ϕ

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    Implementation architecture of the multi-phase PGC algorithm based on 3×3 coupler

    Fig. 2. Implementation architecture of the multi-phase PGC algorithm based on 3×3 coupler

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    Relationship among CNTF,i, C value and working point ϕ of the two PGC demodulation algorithms. (a) CNTF,i of traditional PGC algorithm changes with the working point ϕ at different C values; (b) CNTF,i of multi-phase PGC algorithm changes with the working point ϕ at different C values; (c) maximum fluctuation of CNTF,i of traditional PGC algorithm at different C values; (d) maximum fluctuation of CNTF,i of multi-phase PGC algorithm at different C values

    Fig. 3. Relationship among CNTF,i, C value and working point ϕ of the two PGC demodulation algorithms. (a) CNTF,i of traditional PGC algorithm changes with the working point ϕ at different C values; (b) CNTF,i of multi-phase PGC algorithm changes with the working point ϕ at different C values; (c) maximum fluctuation of CNTF,i of traditional PGC algorithm at different C values; (d) maximum fluctuation of CNTF,i of multi-phase PGC algorithm at different C values

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    Noise transfer performance of multi-phase PGC algorithm based on 3×3 coupler under different C values. (a) C=1.77; (b) C=2.37; (c) C=2.63; (d) C=3.30

    Fig. 4. Noise transfer performance of multi-phase PGC algorithm based on 3×3 coupler under different C values. (a) C=1.77; (b) C=2.37; (c) C=2.63; (d) C=3.30

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    Schematic diagram of experimental system

    Fig. 5. Schematic diagram of experimental system

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    Noise test results of fiber-hydrophone using multi-phase PGC algorithm based on 3×3 coupler

    Fig. 6. Noise test results of fiber-hydrophone using multi-phase PGC algorithm based on 3×3 coupler

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    Qingkai Hou, Qiong Yao, Hu Chen, Shuidong Xiong. A Multi-Phase Phase-Generated Carrier Demodulation Algorithm for Stability Improvement of Noise Transfer Coefficient for Fiber Optic Hydrophone[J]. Acta Optica Sinica, 2024, 44(2): 0207001

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    Paper Information

    Category: Fourier optics and signal processing

    Received: Jul. 10, 2023

    Accepted: Nov. 6, 2023

    Published Online: Jan. 11, 2024

    The Author Email: Qiong Yao (yqnudt@nudt.edu.cn)

    DOI:10.3788/AOS231255

    CSTR:32393.14.AOS231255

    Topics

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