CAO Ye,ZHAO Chen,TONG Zheng-rong.All fiber sensor based on Mach-Zehnder interferometer for simultaneous measurement of temperature and refractive index[J].Optoelectronics Letters,2015,11(6):438-443 |
All fiber sensor based on Mach-Zehnder interferometer for simultaneous measurement of temperature and refractive index |
Author Name | Affiliation | CAO Ye | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China | ZHAO Chen | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China | TONG Zheng-rong | Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin 300384, China |
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Abstract: |
In this paper, we propose and experimentally demonstrate a compact optical fiber sensor based on a Mach-Zehnder interferometer (MZI) cascaded with fiber Bragg grating (FBG) for simultaneous measurement of refractive index (RI) and temperature. In order to get a proper spectrum, we discuss the effects of different structure parameters of MZI. Using the resonant wavelength of the FBG (DipFBG) and the interference dip of the MZI (Dip1), the RI and temperature of the surrounding medium can be determined. The sensor has good operation linearity. The experimental results show that the distinctive spectral sensitivities are 0.071 75 nm/°C and ?91.766 67 nm/RIU (refraction index unit) for Dip1 and 0.009 09 nm/°C for DipFBG. |
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This work has been supported by the National High Technology Research and Development Program of China (No.2013AA014200), the Na- |
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