High Sensitivity Fiber Optic Temperature Sensor Based on Tunable Laser Vernier Sampling

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-12-05 DOI:10.1109/LPT.2024.3511652

Yuqiang Yang;Zhihao Huang;Yitong Li;Han Xia;Chengyu Mo;Yuting Li;Yuying Zhang

引用次数: 0

Abstract

A high-sensitivity optical fiber temperature sensor based on the vernier sampling of tunable laser was proposed. The sensor contains only one fiber Sagnac interferometer (FSI), and the Vernier effect is achieved by controlling the sampling interval of the tunable narrow-band laser. When the wavelength sampling interval of the tunable laser is close but not equal to the free spectral range (FSR) of the FSI, the spectrum received by the optical power meter will be the envelope generated by the Vernier effect. The experimental results show that for the FSI with an FSR of 2.47 nm, when the sampling interval of 2.78 nm, which is slightly greater than the FSR of the FSI, is selected, an interference spectrum envelope is obtained, and its temperature sensitivity is about 9.1 times that of the FSI. The results prove that vernier sampling is feasible to improve the sensitivity of a single FSI, and its advantage is that the sampling interval can be flexibly controlled to achieve different sensitivity magnifications.

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基于可调谐激光游标采样的高灵敏度光纤温度传感器

提出了一种基于可调谐激光器游标采样的高灵敏度光纤温度传感器。该传感器仅包含一个光纤Sagnac干涉仪（FSI），通过控制可调谐窄带激光器的采样间隔来实现游标效应。当可调谐激光器的波长采样间隔接近但不等于FSI的自由光谱范围（FSR）时，光功率计接收到的光谱将是游标效应产生的包络线。实验结果表明，对于FSI为2.47 nm的FSI，当选取略大于FSI FSR的2.78 nm采样间隔时，可获得干扰谱包络，其温度灵敏度约为FSI的9.1倍。结果表明，游标采样提高单个FSI的灵敏度是可行的，其优点是可以灵活控制采样间隔以实现不同的灵敏度放大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.