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基于马赫增德尔折射率光纤传感器的研究
首发时间：2024-04-09
摘要：本文介绍了一种基于马赫-增德尔的干涉型折射率光纤传感器，将去掉包层的传感臂直接浸入待测液体中，并与另一带有包层的相同光纤结构进行耦合。当改变待测液体折射率时，通过波长调制技术实现对干涉波形的解调，从而实现待测液体折射率的测量。结果显示1510.54nm的干涉谷对折射率的敏感度为915.41nm/riu，最小分辨率误差为4.65e-5。该结构具有良好的灵敏度，同时结构简单、制作成本低，具有较好的应用前景。
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research on mach-zehnder refractive index fiber sensor
abstract：this paper introduces an interferometric refractive index fiber sensor based on mach-zehnder. the sensing arm without cladding is directly immersed in the liquid to be measured and coupled with another same fiber structure with cladding. when the refractive index of the liquid to be measured is changed, the interference waveform is demodulated by wavelength modulation technology, so as to measure the refractive index of the liquid to be measured. the results show that the sensitivity of 1510.54nm interference valley to refractive index is 915.41nm/riu, and the minimum resolution error is 4.65e-5. the sensitivity of the structure is greatly improved, and at the same time, the structure has good sensitivity, simple structure, low manufacturing cost and good application prospect.
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