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All fiber sensor based on Mach-Zehnder interferometer for simultaneous measurement of temperature and refractive index

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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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Authors and Affiliations

  1. Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Computer and Communication Engineering, Tianjin University of Technology, Tianjin, 300384, China

    Ye Cao  (曹晔), Chen Zhao  (赵晨) & Zheng-rong Tong  (童峥嵘)

Authors
  1. Ye Cao  (曹晔)
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  2. Chen Zhao  (赵晨)
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  3. Zheng-rong Tong  (童峥嵘)
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Corresponding author

Correspondence to Chen Zhao  (赵晨).

Additional information

This work has been supported by the National High Technology Research and Development Program of China (No.2013AA014200), the National Natural Science Foundation of China (No.11444001), and the Municipal Natural Science Foundation of Tianjin (No.14JCYBJC16500).

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Cao, Y., Zhao, C. & Tong, Zr. All fiber sensor based on Mach-Zehnder interferometer for simultaneous measurement of temperature and refractive index. Optoelectron. Lett. 11, 438–443 (2015). https://doi.org/10.1007/s11801-015-5175-y

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  • DOI: https://doi.org/10.1007/s11801-015-5175-y

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