Simultaneous measurement of refractive index and temperature using multimode microfiber-based dual Mach-Zehnder interferometer

Haipeng Luo, Qizhen Sun*, Zhilin Xu, Deming Liu, Lin Zhang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A multimode microfiber (MMMF)-based dual Mach-Zehnder interferometer (MZI) is proposed and demonstrated for simultaneous measurement of refractive index (RI) and temperature. By inserting a section of MMMFsupporting a few modes in the sensing arm of the MZI setup, an inline interference between the fundamental mode and the high-order mode of MMMF, as well as the interference between the high-order mode of MMMF and the reference arm, i.e., the dual MZI, is realized. Due to different interference mechanisms, the former interferometer achieves RI sensitivity of 2576.584 nm/RIU and temperature sensitivity of 0.193 nm/°C, while the latter one achieves RI sensitivity of 1001.864 nm/RIU and temperature sensitivity of 0.239 nm/°C, demonstrating the ability to attain highly accurate multiparameter measurements.

Original languageEnglish
Pages (from-to)4049-4052
Number of pages4
JournalOptics Letters
Volume39
Issue number13
Early online date30 Jun 2014
DOIs
Publication statusPublished - 1 Jul 2014

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