Tapered-open-cavity-based in-line Mach–Zehnder interferometer for highly sensitive axial-strain measurement

Author:

Liu Chuanxu1,Zhang Meng2,Zhang Hui1,Yang Jiuru1ORCID,Shang Qinghai1,Yang Xiaotong1,Wang Shuai1,Ran Lingling1

Affiliation:

1. Heilongjiang University

2. China Electronics Technology Group Corporation

Abstract

An in-line Mach-Zehnder interferometer based on a multimode-fiber-assisted tapered open-cavity (TOC) is proposed. Light field distributions of the TOC were investigated using beam propagation method with different offsets and diameters of the taper waist. Bias and uniform taper (BT and UT)-based structures were fabricated and compared using one- and two-step arc-discharge methods, and comprehensive tests were then conducted considering axial-strain. The experimental results show that the UT structure has more than −45 pm/µɛ linear wavelength shift with the applied axial-strain. Owing to its compact size and low cost, the proposed sensor is promising for axial-strain-related high-precision engineering applications.

Funder

National Natural Science Foundation of China

The Project of the Central Government Supporting the Reform and Development of Local Colleges and Universities

The Graduate Innovation Research Project of Heilongjiang University

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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