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Fiber sensor based on Fabry‐Perot / Mach‐Zehnder hybrid interferometer for transverse load and temperature
Author(s) -
Han Yang,
Liu Bo,
Wu Yongfeng,
Mao Yaya,
Zhao Lilong,
Sun Tingting,
Nan Tong,
Wang Jin,
Tang Rong
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32625
Subject(s) - interferometry , mach–zehnder interferometer , fusion splicing , cladding (metalworking) , fabry–pérot interferometer , materials science , optical fiber , optics , sensitivity (control systems) , fiber optic sensor , transverse plane , optoelectronics , physics , engineering , electronic engineering , composite material , wavelength , structural engineering
A fiber optic sensor based on array of silica microspheres and air cavity have been fabricated in fusion splicer and experimentally demonstrated in this article. The four‐microspheres structure stimulates higher‐order cladding modes of the gaussian beam, and the air cavity acts as a coupler for Mach‐Zehnder interferometer (MZI) on the one hand and a Fabry‐Perot interferometer (FPI) on the other. The sensing head is subjected to temperature and transverse load where the sensitivity of 160 pm/°C and 124.6 pm/N are obtained, respectively. Compared with similar sensors, the sensor has the advantages of high sensitivity, low‐cost and practical, and it will have a great market prospect.