title: Simultaneous measurement of refractive index and temperature using multimode microfiber-based dual Mach-Zehnder interferometer.
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.
authors: Haipeng
authors: H
authors: Luo
authors: Qizhen
authors: Q
authors: Sun
authors: Zhilin
authors: Z
authors: Xu
authors: Deming
authors: D
authors: Liu
authors: Lin
authors: L
authors: Zhang
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology; D007368:Interferometry / Q000295:instrumentation / Q000379:methods*; D055100:Optical Fibers; D055620:Optical Phenomena; D012031:Refractometry / Q000295:instrumentation / Q000379:methods*; D013696:Temperature