25 May 2017 Polarization-maintaining fiber sensor for simultaneous measurement of the temperature and refractive index
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Abstract
A polarization-maintaining fiber (PMF) sensor for simultaneous measurement of the temperature and refractive index (RI) based on the Mach–Zehnder interferometer is proposed and demonstrated experimentally. This fiber sensor is constructed by sandwiching a 20-mm waist-enlarged PMF between two single-mode fibers (SMFs). Using the wavelength shifts of different interference dips and the sensitivity matrix, two external parameters can be measured simultaneously. Experiment results show that the sensitivities to the temperature are 145.6    pm / ° C and 0.1256    nm / ° C and the sensitivities to the RI are 35.0502 and 23.3694    nm / RIU for two interference dips, respectively. This fiber sensor is simple and easy to fabricate, has high sensitivity, and can be applied to other fields, such as biological and chemical sensings.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Rui-an Zhao, Rui-an Zhao, Tingting Lang, Tingting Lang, Jun Chen, Jun Chen, Jie Hu, Jie Hu, } "Polarization-maintaining fiber sensor for simultaneous measurement of the temperature and refractive index," Optical Engineering 56(5), 057113 (25 May 2017). https://doi.org/10.1117/1.OE.56.5.057113 . Submission: Received: 6 January 2017; Accepted: 8 May 2017
Received: 6 January 2017; Accepted: 8 May 2017; Published: 25 May 2017
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