Mach–Zehnder interferometer based on a cross-type microchannel in SMS fiber structure for gas pressure sensing with high sensitivity

Yu Wang; Yi Liu; Renxi Gao; Kunjian Cao; Shiliang Qu

doi:10.1117/1.OE.57.9.096101

8 September 2018 Mach–Zehnder interferometer based on a cross-type microchannel in SMS fiber structure for gas pressure sensing with high sensitivity

Yu Wang, Yi Liu, Renxi Gao, Kunjian Cao, Shiliang Qu

Author Affiliations +

Optical Engineering, Vol. 57, Issue 9, 096101 (September 2018). https://doi.org/10.1117/1.OE.57.9.096101

Abstract

An inline fiber Mach–Zehnder interferometer (MZI) based on a cross-type microchannel in single mode–multimode–single mode fiber structure was proposed. The cross-type microchannel was fabricated in the fiber material directly using femtosecond laser-induced breakdown in water. The horizontal part of the cross-type microchannel along the fiber direction results in enough phase difference for the interference, and the cross-type shape makes the whole structure more robust because a smaller part of fiber material is etched. In addition, the proposed MZI shows high-pressure sensitivity (−14.27 nm / MPa), low-temperature cross sensitivity (0.043 nm/°C), and low strain force cross sensitivity (0.257 nm/N), which makes it a promising candidate for applications in gas pressure sensing field.

Citation Download Citation

Yu Wang, Yi Liu, Renxi Gao, Kunjian Cao, and Shiliang Qu "Mach–Zehnder interferometer based on a cross-type microchannel in SMS fiber structure for gas pressure sensing with high sensitivity," Optical Engineering 57(9), 096101 (8 September 2018). https://doi.org/10.1117/1.OE.57.9.096101

Received: 21 May 2018; Accepted: 20 August 2018; Published: 8 September 2018

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