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Lateral Stress Detection Using a Tapered Fiber Mach–Zehnder Interferometer

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5 Author(s)
Ping Lu ; Dept. of Phys., Univ. of Ottawa, Ottawa, ON, Canada ; Ganbin Lin ; Xiaozhen Wang ; Liang Chen
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In this letter, a novel approach to measure local lateral stress using a tapered fiber Mach-Zehnder interferometer (TFMZI) is proposed and demonstrated. The transmission spectra of the TFMZI are measured under different transverse pressures and loading positions. The responses of the TFMZI are analyzed in a spatial frequency domain by fast Fourier transform of the corresponding transmission spectra. The proposed approach allows an effective detection of lateral stress-induced fiber deformation at different positions along a TFMZI.

Published in:

Photonics Technology Letters, IEEE  (Volume:24 ,  Issue: 22 )