Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber

Table 1. As₂Se₃ fibre core and PMMA cladding parameters
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Table 1. As₂Se₃ fibre core and PMMA cladding parameters
$n$ $ρ /$ （kg·m⁻³） $p_{11}$ $p_{12}$ $p_{44}$ $c_{11} / Gpa$ $c_{12} / Gpa$ $c_{44} / Gpa$ $Q_{f} / GHz$
As₂Se₃ 2.674 4640 0.314 0.266 0.024 23.5 9.5 6.99 7000
PMMA 1.481 1187 0.3 0.297 0.0015 4.34 6.63 1.145 20

Table 2. Experimental and simulated Brillouin frequency shift of chalcogenide fiber
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Table 2. Experimental and simulated Brillouin frequency shift of chalcogenide fiber
硫系光纤布里渊频移仿真结果测量结果
慢轴/GHz 7.576 3 7.585 8
快轴/GHz 7.570 5 7.580 7
差值/MHz 5.8 5.1

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Tingting CAO, Guowen AN. Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber[J]. Journal of Applied Optics, 2025, 46(2): 465

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