A tension insensitive PbS fiber temperature sensor based on Sagnac interferometer

• Published in: Optoelectronics letters Vol. 13; no. 2; pp. 135 - 137
• Main Author: 付兴虎 张江鹏 杨凯丽 董艳华 文建湘 付广伟 毕卫红
• Format: Journal Article
• Language: English
• Published: Tianjin Tianjin University of Technology 01.03.2017; Springer Nature B.V
• Subjects: Interference; Lasers; Optical Devices; Optics; PBS; Photonics; Physics; Physics and Astronomy; Sagnac干涉仪; Sensitivity; Sensors; 交叉敏感; 传感机理; 光纤温度传感器; 光谱红移; 张力; 温度范围; A
• ISSN: 1673-1905; 1993-5013
• DOI: 10.1007/s11801-017-6238-z

In this paper, a tension insensitive Pb S fiber temperature sensor based on Sagnac interferometer is proposed and demonstrated. The sensing mechanism of tension and temperature is analyzed. The relationships between the interference spectrum, temperature and tension are analyzed, respectively. The experimental temperature range is 36—70 °C. The experimental results show that the interference spectrum is red shifted, and its sensitivity is 53.89 pm/°C. In tension experiment, the tension range is 0—1 400 με. The experimental results show that there is no wavelength shift in the interference spectrum. The sensor is immune to tension cross-sensitivity compared with other sensors. It can be used for temperature testing in aerospace, chemistry and pharmacy.