Optical Fiber Mach-Zehnder Interferometric Strain Sensor Basedon Concatenating Two Micro Cavities Fabricated by A Femtosecond Laser

Yang, Jun; Wang, Sumei; Chen, Xiaoguang; Zou, Xin; Liu, Yu-Xiao; Lin, Ruo; Wang, Yimin; Chenl, Yang

doi:10.1109/icmae.2019.8881046

Cited by 1 publication

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several traditional MZI sensors based on cascaded, spatial multipath, and linear fiber structures have been reported [7][8][9][10], enhancing the characteristics of sensitivity, loss, stability, and reusability. Besides, a few MZI inline-fiber sensors have been reported by various methods of fabrication, such as up and down tapering [11,12] mode-field or core mismatch [13] and femtosecond laser micromachining [14,15]. Particularly, the equipment of a tapering machine and femtosecond laser is relatively expensive, and its low throughput still limits it to several applications.…”

Section: Introductionmentioning

confidence: 99%

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

Mumtaz¹,

Lin²,

Dai³

et al. 2021

PIER C

View full text Add to dashboard Cite

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 highquality 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.

show abstract