title: Chalcogenide fiber-based distributed temperature sensor with sub-centimeter spatial resolution and enhanced accuracy.
abstract: We demonstrate a sub-centimeter spatial resolution fiber-based distributed temperature sensor with enhanced measurement accuracy and reduced acquisition time. Our approach employs time domain analysis of backscattered Stokes and anti-Stokes photons generated via spontaneous Raman scattering in a chalcogenide (ChG) As2S3 fiber for temperature monitoring. The sensor performance is significantly improved by exploiting the high Raman coefficient and increased refractive index of the ChG fiber. We achieve a temperature uncertainty of ± 0.65 °C for a short measurement time of only 5 seconds; whilst the detection uncertainty is less than ± 0.2 °C for a longer integration time of 2 minutes. We also investigate the optimum Stokes and anti-Stokes bands for optimal sensing performance. Our theoretical analysis shows that a small detuning frequency regime from a pump is more suitable for rapid measurements while a large detuning regime provides higher temperature resolution.
authors: Trung D
authors: TD
authors: Vo
authors: Jiakun
authors: J
authors: He
authors: Eric
authors: E
authors: Magi
authors: Matthew J
authors: MJ
authors: Collins
authors: Alex S
authors: AS
authors: Clark
authors: Brian G
authors: BG
authors: Ferguson
authors: Chunle
authors: C
authors: Xiong
authors: Benjamin J
authors: BJ
authors: Eggleton
mesh_terms: D018011:Chalcogens / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D013817:Thermography / Q000295:instrumentation*; D014159:Transducers
chemical_list: D018011:Chalcogens