Pressure dependence of Brillouin frequency shift in bare silica optical fibers

Gu, Hong; Dong, Huijuan; Zhang, Guangyu; He, Jun; Xu, Ning; Brown, Douglas. J.

doi:10.3788/col201210.100604

Cited by 11 publications

(1 citation statement)

References 8 publications

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“…Gu et al reported the relationship between pressure and Brillouin frequency shift (BFS) of a single-coated SMF based on Brillouin optical time-domain reflectometry (BOTDR) technique. The pressure sensitivity is about -0.74 MHz/MPa within the range of 0-28 MPa [6]. However, there is a large pressure measurement error due to the low pressure sensitivity.…”

Section: Introductionmentioning

confidence: 98%

High sensitivity distributed lateral pressure sensor based on BOTDR

Wang,

Zhu,

Xia

et al. 2023

Third International Computing Imaging Conference (CITA 2023)

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In this work, a high-sensitivity distributed lateral pressure sensor based on Brillouin Optical Time-Domain Reflectometry (BOTDR) technique is proposed to enhance the pressure sensitivity using a double-coated Single-Mode Fiber (SMF). Firstly, a pressure-induced strain model is developed to analyze the enhancement mechanism of pressure sensitivity by Brillouin Frequency Shift (BFS). With increasing of outer coating radius, or with decreasing of the Young’s modulus and Poisson’s ratio of outer coating, the lateral pressure sensitivity increases. By using a double-coated SMF whose outer coating radius is 1500 μm, a high sensitivity of -3.51 MHz/MPa in the range of 0-30 MPa is achieved, which is about five times higher than that of single-coated SMF. At a spatial resolution of 1.5 m, the maximum measurement error of the proposed pressure sensing system is less than 0.09 MPa.

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Section: Introductionmentioning

confidence: 98%