Vol. 112

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2021-04-13

Simultaneous Measurement of Temperature and Strain Using Multi-Core Fiber Within-Line Cascaded Symmetrical Ellipsoidal Fiber Balls-Based Mach-Zehnder Interferometer Structure

By Farhan Mumtaz, Hongfeng Lin, Yutang Dai, Wenbin Hu, Muhammad Aqueel Ashraf, Lashari Ghulam Abbas, Shu Cheng, and Pu Cheng
Progress In Electromagnetics Research C, Vol. 112, 21-34, 2021
doi:10.2528/PIERC21021002

Abstract

Simultaneous measurement of temperature and strain using multi-core fiber (MCF) with an in-line cascaded symmetrical ellipsoidal fiber balls structure of Mach-Zehnder interferometer (MZI) is presented. The sensor is fabricated by using an ordinary fusion apparatus. The thermo-coupling effect is realized through Germanium (Ge)-doped central and hexagonal distributed outer cores of MCF. A high-quality transmission spectrum is obtained with a fringe visibility of 12-15 dB and higher extinction ratio. The sensor exhibits superior mechanical strength compared with the fragile structures, such as tapered, etched, misaligned and offset fibers. The temperature sensitivity of 137.6 pm/°C and 68.1 pm/°C in the range of 20-90°C, and the strain sensitivity of -0.42 pm/με and -1.19 pm/με in the range of 0-801 με are obtained, when probe ``L'' is 40 mm and 20 mm, respectively. Simultaneous measurement of temperature and strain can be achieved by solving the coefficient matrix and tracing the wavelength shifts in the interference spectrum. Besides, the sensor has many advantages, such as high sensitivity, easy fabrication, simple structure, being stable and inexpensive, which may find potential applications in the field of optical sensing.

Citation


Farhan Mumtaz, Hongfeng Lin, Yutang Dai, Wenbin Hu, Muhammad Aqueel Ashraf, Lashari Ghulam Abbas, Shu Cheng, and Pu Cheng, "Simultaneous Measurement of Temperature and Strain Using Multi-Core Fiber Within-Line Cascaded Symmetrical Ellipsoidal Fiber Balls-Based Mach-Zehnder Interferometer Structure," Progress In Electromagnetics Research C, Vol. 112, 21-34, 2021.
doi:10.2528/PIERC21021002
http://www.jpier.org/PIERC/pier.php?paper=21021002

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