2022
DOI: 10.1117/1.oe.61.9.097101
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Research on in-line Mach–Zehnder interferometer concentration sensor based on no-core fiber with lateral offset structure

Abstract: . An in-line Mach–Zehnder interferometer (MZI) based on no-core fiber (NCF) with lateral offset for concentration sensing is presented and demonstrated. The in-line MZI is formed by splicing a section of NCF between two single-mode fibers (SMFs) with a lateral offset. The theoretical and simulation analysis results indicate that the interference dip originates from the mode coupling between the high-order mode LP01 and the high-order mode LP26. In the concentration ranges of 0% to 37%, 37% to 66%, and 66% to 8… Show more

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