Investigation of a Side-polished Fiber MZI and Its Sensing Performance

Zhang, Ping, Liu, Bin, Liu, Juan, Xie, Cheng-Feng, Wan, Sheng-Peng, He, Xing-Dao, Zhang, Xinpu and Wu, Qiang (2020) Investigation of a Side-polished Fiber MZI and Its Sensing Performance. IEEE Sensors Journal, 20 (11). pp. 5909-5914. ISSN 1530-437X

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A novel all-fiber Mach–Zehnder interferometer (MZI), which consists of lateral core fusion splicing of a short section of side-polished single mode fiber (SMF) between two SMFs was proposed and demonstrated. A simple fiber side-polished platform was built to control the side polished depth through a microscope. The sensitivity of the fiber MZI structure to the surrounding refractive index (RI) can be greatly improved with the increase of the side-polished depth, but has no effect on the temperature sensitivity. The sensor with a polished depth of 44.2 μm measured RI sensitivity up to -118.0 nm/RIU (RI unit) in the RI range from 1.333 to 1.387, which agrees well with simulation results by using the beam propagation method (BPM). In addition, the fiber MZI structure also can achieve simultaneous measurement of both RI and temperature. These results show its potential for use in-line fiber type sensing application.

Item Type: Article
Uncontrolled Keywords: Fiber-optic, side-polished, Mach–Zehnder interferometer, refractive index (RI)
Subjects: H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 18 Feb 2020 09:56
Last Modified: 31 Jul 2021 17:51

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