具有直接检测功能的频率调制双脉冲相位敏感光学时域反射仪

IF 2.2 3区物理与天体物理 Q2 OPTICS Optics Communications Pub Date : 2024-11-13 DOI:10.1016/j.optcom.2024.131309

Yafeng Cheng , Hanyong Wang , Changpeng Ming , Lei Qian , Desheng Li , Hongyi Gan , Tianye Huang , Wu Liu , Ming Luo , Lei Dong , Xiang Li

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引用次数: 0

摘要

本文利用频率调制双脉冲探头，在相位敏感光学时域反射仪（Φ-OTDR）中通过直接检测实现对外部振动的定量解调。在所提出的方案中，只需要一个声光调制器（AOM）就能同时产生四个不同频率间隔为 2.5 MHz 的双脉冲。在实验中，只需 10 MHz 的采样率，就能以 12.2 m 的空间分辨率成功恢复 0.1 Hz 至 2000 Hz 的振动。所提出的方法能够对宽频率范围内的振动进行定量解调，在经济高效的分布式声学传感领域具有潜在的应用前景。

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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Frequency-modulated dual-pulse phase-sensitive optical time-domain reflectometry with direct detection

In this paper, frequency-modulated dual-pulse probe is utilized to achieve quantitative demodulation of external vibrations in phase-sensitive optical time-domain reflectometry (Φ-OTDR) with direct detection. In the proposed scheme, only a single acousto-optic modulator (AOM) is required to simultaneously generate the dual-pulse with four different frequencies spacing at 2.5 MHz. In the experiment, the vibrations from 0.1 Hz to 2000 Hz can be successfully recovered with 12.2 m spatial resolution at sampling rate of only 10 MHz. The proposed method is capable of quantitative demodulation of vibrations in wide frequency range, showing potential applications in the area of cost-effective distributed acoustic sensing.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.