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  • Title: Simultaneous measurement of refractive index and temperature using multimode microfiber-based dual Mach-Zehnder interferometer.
    Author: Luo H, Sun Q, Xu Z, Liu D, Zhang L.
    Journal: Opt Lett; 2014 Jul 01; 39(13):4049-52. PubMed ID: 24978804.
    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 MMMF supporting 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.
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