Recent improvement on spatial resolution enhanced distributed temperature sensors

Liang Pan; Xiaojun Yang; Ruiyan Li; Xuefei Bai; Yong Yang

doi:10.1117/12.2624991

27 March 2022 Recent improvement on spatial resolution enhanced distributed temperature sensors

Liang Pan, Xiaojun Yang, Ruiyan Li, Xuefei Bai, Yong Yang

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121697C (2022) https://doi.org/10.1117/12.2624991
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

In this paper, we introduce our recent progress in resolution improvement of distributed temperature sensors by employing narrow pulse laser and wideband avalanche photoelectric detector (APD). The narrow pulse laser generates the light pulse with 4 ns with at its half maximum, which represents 40 cm spatial resolution. the wideband APD is employed to acquire the backscattering light at Raman wavelength and meet the need of spatial resolution of the narrow pulse laser. High spatial resolution is attributive to narrow pulse width, but also leads to the deterioration of the signal to noise ratio of demodulated temperature curve. Thus the APD with both high sensitivity and wideband width is employed to achieve high SNR and high spatial resolution. Temperature tests were taken out to evaluate the performance of proposed sensor. Results showed that the performance of our proposed spatial resolution enhanced distributed temperature sensor could achieve the temperature error of 1.2°C, temperature resolution of 0.49°C, sensing length of 1 km and spatial resolution of 0.5 m.

Citation Download Citation

Liang Pan, Xiaojun Yang, Ruiyan Li, Xuefei Bai, and Yong Yang "Recent improvement on spatial resolution enhanced distributed temperature sensors", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121697C (27 March 2022); https://doi.org/10.1117/12.2624991

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