Reflective birefringent interference temperature sensor based on polarization maintaining optical fiber

被引：0
|
作者：
Bi F. [1 ,2 ]
Zhang D. [1 ,2 ]
Lu L. [1 ,2 ]
Sun G. [1 ,2 ]
Meng F. [1 ,2 ]
机构：
[1] Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing
[2] Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2020年 / 41卷 / 08期
关键词：
Birefringence; Panda-styled; Polarization maintaining fiber; Temperature sensor;
D O I：
10.19650/j.cnki.cjsi.J2006025
中图分类号：
学科分类号：
摘要：
In order to solve the problems that transmissive fiber temperature sensing structure is not conductive to testing and has low sensitivity, a reflective birefringent interference temperature sensor based on panda-styled polarization maintaining optical fiber is proposed and designed. Firstly, through theoretical analysis and numerical simulation, the relationship between the sensing arm length of panda-styled polarization maintaining optical fiber, the angle of the rotation axis and the temperature sensing sensitivity is studied. The reflectivity is improved by plating gold on the end surface of the sensor arm. On this basis, an optical fiber temperature sensing test system was built. The experiment results show that the sensor sensitivity can reach 2.741 nm/℃ in the temperature range of 50℃~56℃ under the conditions of the two polarization maintaining fibers fusion spliced with rotating polarization axes by 45° and polarization maintaining fiber sensing arm length of L=80 cm. The sensor sensitivity is as high as 1.400 nm/℃ in the temperature range of 65℃~76℃ when the sensing arm length of polarization maintaining fiber is L=7 cm and the two polarization maintaining fibers fusion spliced with rotating polarization axes by 30°. Finally, the designed temperature sensor was used in the temperature measurement experiment of the satellite model, which verifies the feasibility and effectiveness of the sensor application. The different wavelength dip drifts show good linear relationship with temperature. © 2020, Science Press. All right reserved.
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页码：120 / 128
页数：8
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