Chinese Journal of Ship Research, Volume. 19, Issue 2, 252(2024)

Displacement sensor with a wide dynamic range based on a balloon-like long-period fiber grating

Pu CHENG1... Huiling QIN2 and Liang PU1 |Show fewer author(s)
Author Affiliations
  • 1Wuhan National Laboratory for Optoelectronics, Huazhong Institute of Electro-Optics, Wuhan 430223, China
  • 2Wuhan Maritime Communication Research Institute, Wuhan 430205, China
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    Objective

    Aiming at the problem of the narrow dynamic range of current optical fiber displacement sensors, a balloon-like long-period fiber grating (LPFG) displacement sensor with a simple structure and easy preparation method is designed.

    Methods

    Based on simulation and optimization by RSOFT software, the measurement range is determined by the balloon-like optical fiber under different curvatures. A multimode fiber balloon-like LPFG (MMF-BLPFG) formed by periodically embedding multimode fiber (MMF) into single-mode fiber (SMF) provides a reference peak for measuring the displacement. Using a precise continuous cutting device as the experimental basis, test samples consistent with the simulation results are prepared for testing.

    Results

    The maximum displacement measurement range of 36 mm is achieved by measuring the drift of two resonance peaks.

    Conclusions

    The proposed sensor has good application potential in large-scale measurement scenarios such as the stability measurement and continuous monitoring of the underwater drainage space piping systems of ships.

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    Pu CHENG, Huiling QIN, Liang PU. Displacement sensor with a wide dynamic range based on a balloon-like long-period fiber grating[J]. Chinese Journal of Ship Research, 2024, 19(2): 252

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    Paper Information

    Category: Weapon, Electronic and Information System

    Received: Feb. 20, 2023

    Accepted: --

    Published Online: Mar. 18, 2025

    The Author Email:

    DOI:10.19693/j.issn.1673-3185.03278

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