Simultaneous measurement of axial strain and temperature based on twisted fiber structure

Xinyue Jiang; Ping Lu; Yuan Sun; Hao Liao; Deming Liu; Jiangshan Zhang; Hui Liao

doi:10.3788/COL201816.040602

Journals >Chinese Optics Letters >Volume 16 >Issue 4 >Page 040602 > Article

Chinese Optics Letters
Vol. 16, Issue 4, 040602 (2018)

Simultaneous measurement of axial strain and temperature based on twisted fiber structure

Xinyue Jiang¹, Ping Lu^1、*, Yuan Sun¹, Hao Liao¹, Deming Liu¹, Jiangshan Zhang², and Hui Liao³

Author Affiliations

¹School of Optical and Electronic Information, National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China

²Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

³Enviromental Protection Science and Technology Co., Ltd., Wuhan 430070, China

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DOI: 10.3788/COL201816.040602 Cite this Article Set citation alerts

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 Copy Citation Text

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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.