Chinese Optics Letters, 2018, 16 (4): 040602, Published Online: Jul. 12, 2018  

Simultaneous measurement of axial strain and temperature based on twisted fiber structure Download: 545次

Author Affiliations
1 School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China
2 Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
3 Enviromental Protection Science and Technology Co., Ltd., Wuhan 430070, China
Abstract
In this Letter, an alternative solution is proposed and demonstrated for simultaneous measurement of axial strain and temperature. This sensor consists of two twisted points on a commercial single mode fiber introduced by flame-heated and rotation treatment. The fabrication process modifies the geometrical configuration and refractive index of the fiber. Different cladding modes are excited at the first twisted point, and part of them are coupled back to the fiber core at the second twisted point. Experimental results show distinct sensitivities of 34.9 pm/με with 49.23 pm/°C and 36.19 pm/με with 62.99 pm/°C for the two selected destructive interference wavelengths.

Xinyue Jiang, Ping Lu, Yuan Sun, Hao Liao, Deming Liu, Jiangshan Zhang, Hui Liao. Simultaneous measurement of axial strain and temperature based on twisted fiber structure[J]. Chinese Optics Letters, 2018, 16(4): 040602.

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