Theoretical study of composite cavity fiber MZI refractive index sensor based on transverse offset structure

IF 0.7 4区 物理与天体物理 Q4 OPTICS
Yuxuan Qi, Yanjie Zhao, Ying Chen, Yubo Liu, Jiacheng Lv, Jiasheng Ni
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引用次数: 0

Abstract

In this paper, we present a Mach–Zehnder interferometer (MZI) sensor utilizing an optical fiber offset. The sensor core comprises multimode fiber (MMF), single-mode fiber (SMF), and offset no-core fiber (NCF), enabling it to detect the refractive index (RI) of liquids. The sensing mechanism of the sensor is theoretically analyzed, and various structural parameters are simulated, using the Beam Propagation Module (BPM). Simulation results indicate that the sensor efficiently operates across the entire wavelength range of 1.5–1.61 µm, providing continuous calibration curves for RI measurement. The sensor sensitivity to RI ranges of 1.3330–1.3340, 1.3334–1.3335, 1.3530–1.3540, and 1.3630–1.3640 are –14342, –14700, –17628, and –19600 nm/RIU, respectively. Additionally, the sensor exhibits a favorable linear response, laying a crucial foundation for developing the high-sensitivity liquid RI sensor design. The sensor boasts a simple, compact design, high sensitivity, and significant application potential in liquid RI measurements.

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来源期刊
CiteScore
1.50
自引率
22.20%
发文量
73
审稿时长
2 months
期刊介绍: The journal publishes original, high-quality articles that follow new developments in all areas of laser research, including: laser physics; laser interaction with matter; properties of laser beams; laser thermonuclear fusion; laser chemistry; quantum and nonlinear optics; optoelectronics; solid state, gas, liquid, chemical, and semiconductor lasers.
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