Weak Reflection Fiber Bragg Grating Hydrophone with Secondary Coating Sensitization

Peng Ding; Junbin Huang; Gaofei Yao; Hongcan Gu; Wen Liu; Jinsong Tang

doi:10.3788/CJL202148.0906003

Chinese Journal of Lasers, Volume. 48, Issue 9, 0906003(2021)

Weak Reflection Fiber Bragg Grating Hydrophone with Secondary Coating Sensitization

Peng Ding^1,2, Junbin Huang^1、*, Gaofei Yao¹, Hongcan Gu¹, Wen Liu¹, and Jinsong Tang²

Author Affiliations

¹Department of Weapon Engineering, Naval University of Engineering, Wuhan, Hubei 430033, China

²College of Electronic Engineering, Naval University of Engineering, Wuhan, Hubei 430033, China

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Abstract Get PDF(in Chinese)

Figures & Tables(13)

Fig. 1. Profile of WFBG hydrophone

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Fig. 2. Relationship between M_signal and R₃, E₃, ν₃. (a) Between M_signal and R₃; (b) between M_signal and E₃; (c) between M_signal and ν₃

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Fig. 3. Relationship between R₃ and M_signal

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Fig. 4. Phase-sound pressure sensitivity testing system of WFBG hydrophone. (a) System; (b) vibrating liquid column; (c) coating fiber

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Fig. 5. Frequency response characteristics of the high density polyethylene fiber ring. (a) Displacement of the ring; (b) acceleration response of No.18901 node

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Fig. 6. 5 Hz signal of bare WFBG array. (a) Time domain signal; (b) frequency domain signal

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Fig. 7. 7.5 Hz signal of bare WFBG array. (a) Time domain signal; (b) frequency domain signal

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Fig. 8. 10 Hz signal of bare WFBG array. (a) Time domain signal; (b) frequency domain signal

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Fig. 9. 5 Hz signal of high density polyethylene coated WFBG hydrophone with 0.4 mm diameter. (a) Time domain signal; (b) frequency domain signal

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Fig. 10. 7.5 Hz signal of high density polyethylene coated WFBG hydrophone with 0.4 mm diameter. (a) Time domain signal; (b) frequency domain signal

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Fig. 11. 10 Hz signal of high density polyethylene coated WFBG hydrophone with 0.4 mm diameter. (a) Time domain signal; (b) frequency domain signal

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Table 1. Properties and expected sensitization effects of four kinds of materials
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Table 1. Properties and expected sensitization effects of four kinds of materials
Material Elastic modulus /GPa Poisson's ratio Sensitization effect /dB
Epoxy resin 1.00 0.380 16.5
Polyimide 1.35 0.329 8.5
Polyethylene 0.84 0.380 19.8
Nylon1010 1.07 0.340 13.3

Table 2. Phase-sound pressure sensitivity of uncoated WFBG array and coated WFBG hydrophone unit: dB
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Table 2. Phase-sound pressure sensitivity of uncoated WFBG array and coated WFBG hydrophone unit: dB
Sensor 5 Hz 7.5 Hz 10 Hz
Bare WFBG array -176.26 -170.53 -160.96
Coated WFBG hydrophone -132.74 -126.93 -126.04

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Peng Ding, Junbin Huang, Gaofei Yao, Hongcan Gu, Wen Liu, Jinsong Tang. Weak Reflection Fiber Bragg Grating Hydrophone with Secondary Coating Sensitization[J]. Chinese Journal of Lasers, 2021, 48(9): 0906003

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Paper Information

Category: fiber optics and optical communications

Received: Nov. 18, 2020

Accepted: Dec. 15, 2020

Published Online: Apr. 26, 2021

The Author Email: Huang Junbin (tsyj98@163.com)

DOI:10.3788/CJL202148.0906003

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Properties and expected sensitization effects of four kinds of materials

Table 1. Properties and expected sensitization effects of four kinds of materials

Table 2. Phase-sound pressure sensitivity of uncoated WFBG array and coated WFBG hydrophone unit: dB

Table 2. Phase-sound pressure sensitivity of uncoated WFBG array and coated WFBG hydrophone unit: dB