基于线性谐振腔的无调制宽带光纤电流传感器。

IF 3.3 2区物理与天体物理 Q2 OPTICS

Optics letters Pub Date : 2025-10-01 DOI:10.1364/OL.575435

Sizhe Zhang, Qingwen Liu, Shuting Liu, Binglin Chen, Zuyuan He

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引用次数: 0

摘要

提出了一种基于宽带源和单模线性谐振腔的无调制、低成本光纤电流传感器。被测电流的法拉第效应导致两束正交圆偏振态之间存在相位差。在不同圆周上传播的腔外光束连续叠加并一起解调。利用3×3耦合器和平衡光电探测器可以在没有主动调制的情况下获取电流信息。在直流测量中，灵敏度为1.749 mV/ a，在0-200 a范围内平均相对误差小于0.2%。该传感器具有良好的交流电流检测能力。此外，还对系统的短期和长期噪声性能进行了分析。

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Modulation-free broadband fiber optic current sensor based on a linear resonant cavity.

A modulation-free, low-cost fiber optic current sensor based on a broadband source and a single-mode linear resonant cavity is presented. The Faraday effect of the current under test results in a phase difference between the two beams with orthogonal circular polarization states. The out-cavity beams propagating in different circles continuously superimpose and are demodulated together. The utilization of a 3×3 coupler and balanced photodetector enables the acquisition of current information without active modulation. In the direct current measurement, a sensitivity of 1.749 mV/A and a mean relative error below 0.2% within 0-200 A are achieved. The sensor exhibits a good capability for detecting the alternating current. In addition, the short-term and long-term noise performance of this system is analyzed.

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来源期刊

Optics letters 物理-光学

CiteScore

6.60

自引率

8.30%

发文量

2275

审稿时长

1.7 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.