Highly Sensitive Optoelectronic Oscillator-Based FBG Sensor via Coarse Sampling and Vernier Effect

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

IEEE Photonics Technology Letters Pub Date : 2024-09-10 DOI:10.1109/LPT.2024.3457492

Ruoqi Wang;Wenrui Wang;Jun Hu;Biying Zhou;Xueqian Bai;Lingyun Ye;Kaichen Song

引用次数: 0

Abstract

A highly sensitive method utilizing coarse frequency sampling and Vernier effect for optoelectronic oscillator (OEO) based fiber Bragg grating (FBG) sensing system is proposed and experimentally demonstrated. To generate the Vernier effect, the frequency sampling interval is set close to the free spectral range of the OEO. Cubic spline fitting and power normalization were applied to obtain smooth sampling curve. The peak frequency of the fitted curve was chosen to measure the spectral shift. In the temperature test experiment, a controllable sensitivity was achieved by changing the sampling interval. The sensitivity of 222.84kHz

$/^{\circ }$

C was obtained, which was 127.26 times higher than that of traditional single-loop OEO. Our method requires no modifications to the sensing circuit. Furthermore, it can be used in other OEO-based sensors, indicating promising application prospects.

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通过粗采样和游标效应实现基于光电振荡器的高灵敏度 FBG 传感器

本文提出了一种基于光纤布拉格光栅（FBG）传感系统的高灵敏度方法，该方法利用了粗频率采样和维尔尼尔效应。为了产生游标效应，频率采样间隔设置为接近 OEO 的自由光谱范围。通过三次样条拟合和功率归一化，获得了平滑的采样曲线。选择拟合曲线的峰值频率来测量光谱偏移。在温度测试实验中，通过改变采样间隔实现了可控灵敏度。灵敏度达到 222.84kHz $/^{circ }$ C，是传统单环 OEO 的 127.26 倍。我们的方法无需修改传感电路。此外，它还可用于其他基于 OEO 的传感器，具有广阔的应用前景。

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.