arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2501.03589physics.optics
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基于光纤弱测量的长距离高精度高灵敏度时延传感

Long-distance high-precision and high-sensitivity time delay sensing based on fiber optic weak measurements

Wei-Qian Zhao, Zi-Fu Su, Ya-Fei Yu, Jin-Dong Wang

AI总结:

针对偏振模色散时延损害长距离高精度光纤传感的问题,提出基于强度对比度的弱测量方案,实现阿秒级时延检测并增强有效距离与对准鲁棒性。

摘要:

在光纤传感中,由偏振模色散引起的时延会使依赖相位或强度变化进行测量的系统中的信号发生畸变,从而降低性能,尤其是在长距离、高精度应用中。为应对这一挑战,我们提出一种基于弱测量并利用强度对比度的方案,用于在较大固有延时条件下实现高精度、高灵敏度的光纤时延估计。我们证明,较窄的光源带宽能够提高高灵敏度测量的有效传感距离。结果表明,即使存在较大的固有延时,测量精度和灵敏度仍可与偏置弱测量相比,能够检测阿秒量级的时延变化,对应于25.5 Pa的水压变化。该方案对光纤对准误差也具有鲁棒性,为长距离分布式光纤传感提供了一种新颖解决方案,并拓展了弱测量技术的应用。

英文摘要:

In fiber optic sensing, time delays induced by polarization mode dispersion can distort signals in systems relying on phase or intensity variations for measurement, degrading performance, especially in long distance, high-precision applications. To address this challenge, we propose a weak measurement-based scheme using intensity contrast ratio for high-precision, high-sensitivity fiber optic delay estimation under large inherent time delays. We demonstrate that a narrower light source bandwidth enhances the effective sensing distance for high-sensitivity measurements. Our results show that, even with large inherent time delays, the measurement precision and sensitivity remain comparable to those of biased weak measurement, enabling detection of time delay variations at the attosecond level, corresponding to a 25.5 Pa water pressure change. The scheme is also robust against fiber misalignment errors, offering a novel solution for long-distance distributed fiber-optic sensing and broadening the applications of weak measurement techniques.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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