Simultaneous measurement of strain and torsion based on a seven-core fiber Mach-Zehnder interferometer

Fan Zhang; Junhui Hu Sr.; Jinpeng Wei

doi:10.1117/12.2549922

20 December 2019 Simultaneous measurement of strain and torsion based on a seven-core fiber Mach-Zehnder interferometer

Fan Zhang, Junhui Hu Sr., Jinpeng Wei

Proceedings Volume 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019); 112094P (2019) https://doi.org/10.1117/12.2549922
Event: Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 2019, Xi'an, China

Abstract

A Mach-Zehnder interferometer based on seven-core fiber (SCF) and muti-mode fiber (MMF) is proposed and experimentally demonstrated. The interferometer is fabricated by splicing a segment of SCF spliced with two MMFs. The SCF length and MMF length are 5cm and 1cm, respectively. When the broadband light is injected into the interferometer through a lead-in single mode fiber, a pronounced interference pattern appears in the transmission spectrum. By monitoring the wavelength and power shifts of interference dips, simultaneous measurement of strain and torsion can be achieved. The experimental results show that the wavelengths at interference dip have a blue shift with the increases of strain, but the wavelength does not respond to the torsion. The power sensitivities of the interference dip to the strain and torsion are sensitivities are 0.001dB /° and 0.16dB/°, respectively. The simultaneous measurement of strain and torsion is demonstrated based on the sensitive matrix. The proposed MZI exhibits the advantages of easy fabrication, low cost, and simultaneous measurement of strain and torsion, which will make a significant contribution to torsion measurement.

Citation Download Citation

Fan Zhang, Junhui Hu Sr., and Jinpeng Wei "Simultaneous measurement of strain and torsion based on a seven-core fiber Mach-Zehnder interferometer", Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 112094P (20 December 2019); https://doi.org/10.1117/12.2549922

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