Improving the sensitivity of magnetic field sensing system based on fiber mode-lock laser

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2024-11-23 DOI:10.1016/j.yofte.2024.104049

Jian Xu , Sa Yang , Tigang Ning , Hongwei Yue , Yan Chen , Renlong Zhou , Tao Liao

引用次数: 0

Abstract

This paper proposed and experimentally demonstrated a useful technology to improve the sensitivity of magnetic field sensing system based on the beat frequency demodulation of fiber laser. The sensing principle of the proposed system is detecting the beat frequency variation which is caused by the length change of laser cavity. A 3D-printed transducer was used in this paper to convert the magnetic field change to the beat frequency variation, which is the essential sensing part as well. Besides, we found that, mode locking technology could conduce to advance the signal-to-noise ratio of the beat frequency signal, which could further significantly improve the sensing sensitivity and frequency resolution. Experiment results demonstrate that the magnetic field sensitivity is −3.52 kHz/mT, and the actual resolution of the mode-locked laser sensing system is one hundred times higher than it in continuous-wave laser.

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提高基于光纤锁模激光器的磁场传感系统的灵敏度

本文提出并通过实验证明了一种基于光纤激光器节拍频率解调的有用技术，可提高磁场传感系统的灵敏度。该系统的传感原理是检测由激光腔长度变化引起的拍频变化。本文使用 3D 打印换能器将磁场变化转换为拍频变化，这也是必不可少的传感部分。此外，我们还发现，模式锁定技术可以提高拍频信号的信噪比，从而进一步显著提高传感灵敏度和频率分辨率。实验结果表明，锁模激光传感系统的磁场灵敏度为 -3.52 kHz/mT，实际分辨率是连续波激光的一百倍。

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

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.