Acta Optica Sinica, Volume. 42, Issue 16, 1606005(2022)

Suppression of Nonlinear-Crosstalk in Remotely Interrogated Optical Fiber Hydrophone Systems

Chunyan Cao1,2, Ningtao Hu1, Qingkai Hou1,2, and Shuidong Xiong1,2、*
Author Affiliations
  • 1College of Meteorology and Oceanology, National University of Defense Technology, Changsha 410073, Hunan , China
  • 2Hunan Provincial Key Laboratory of Ocean Exploration Technology, Changsha 410073, Hunan , China
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    Nonlinear wavelength crosstalk is one of the key factors which restrict transmission distance and detection performance of remotely interrogated optical fiber hydrophone (OFH) systems with dense wavelength division multiplexed (DWDM) and time division multiplexed (TDM) structures. In this paper, wavelength power conversion and nonlinear crosstalk problems caused by stimulated Raman scattering (SRS) under the condition of multi-wavelength and high peak power injection are analyzed theoretically and simulated. And a crosstalk suppression structure based on wavelength-staggered emission is proposed. Experimental results of the remotely interrogated 16DWDM×8TDM OFH system show that with this wavelength-staggered scheme, the wavelength optical power imbalance after 100 km transmission is reduced by 9.7 dB compared with the original scheme, and phase noises of the hydrophone channels associated with the wavelength 1 and wavelength 16, which are most affected by the crosstalk, are reduced by 20.0 dB and 10.5 dB, respectively, to the level of -97.0 dB and -96.5 dB. So the results verify the validity of the wavelength-staggered structure. The study can provide an important reference for the design of the optical emission and transmission links of remotely interrogated OFH systems.

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    Chunyan Cao, Ningtao Hu, Qingkai Hou, Shuidong Xiong. Suppression of Nonlinear-Crosstalk in Remotely Interrogated Optical Fiber Hydrophone Systems[J]. Acta Optica Sinica, 2022, 42(16): 1606005

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Dec. 24, 2021

    Accepted: Mar. 24, 2022

    Published Online: Aug. 4, 2022

    The Author Email: Xiong Shuidong (nudtxsd@163.com)

    DOI:10.3788/AOS202242.1606005

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