Hybrid fiber optic interferometers for temperature and strain measurements

Tianyin Wu; Wenwen Quan; Laipeng Shao; Hanglin Lu; Jing Du; Junhui Hu

doi:10.1117/12.2285508

25 October 2017 Hybrid fiber optic interferometers for temperature and strain measurements

Tianyin Wu, Wenwen Quan, Laipeng Shao, Hanglin Lu, Jing Du, Junhui Hu

Proceedings Volume 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications; 104641S (2017) https://doi.org/10.1117/12.2285508
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

Abstract

The hybrid fiber optic interferometers are proposed and experimentally demonstrated. In our schemes, the hybrid fiber optic interferometers are constructed by single mode-multimode-polarization maintaining-single mode optical fiber (SMPS) structure and a Sagnac loop. The temperature and strain characteristics of the hybrid interferometers are studied in experiment, and the sensitivities depending on the length of polarization maintaining optical fiber (PMF) and multimode optical fiber (MMF) are detailedly investigated in experiment. The experimental results have demonstrated that the PMF and MMF lengths have low affect on the strain sensitivity but has great influence on the temperature sensitivity. The achieved strain sensitivity is 37.2pm/με for 10cm PMF and 12cm MMF. The achieved strain sensitivity is 38.0pm/με for 12cm PMF when the length of MMF is fixed at 15cm, and is 37.2 pm/με for 12cm MMF when the length of PMF is fixed at 10cm. The obtained temperature sensitivities is 1.723nm/°C when the length of MPF is 8cm with the fixed length of 15cm MMF, and the obtained temperature sensitivities reach 1.848nm/℃when the length of MMF is 12cm with the fixed length of 10cm PMF.

Citation Download Citation

Tianyin Wu, Wenwen Quan, Laipeng Shao, Hanglin Lu, Jing Du, and Junhui Hu "Hybrid fiber optic interferometers for temperature and strain measurements", Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 104641S (25 October 2017); https://doi.org/10.1117/12.2285508

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KEYWORDS

Interferometers

Temperature metrology

Hybrid fiber optics

Sensors

Fiber optics sensors

Optical fibers

Single mode fibers

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