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相关概念视频

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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基于分布式Brillouin放大功率的增强混合分布式多参数光纤传感.

Junzhe Yu, Hua Zheng, Pengbai Xu

    Optics express
    |November 11, 2025
    PubMed
    概括

    这项研究引入了使用光学声链 (OCC) 进行增强的混合分布式光纤传感,以改善信号噪声比. 这种方法可以在50公里范围内同时分布式传感声学和温度.

    科学领域:

    • 光纤传感传感器是指光纤传感器.
    • 分布式传感系统 分布式传感系统
    • 光子学和光学技术的技术.

    背景情况:

    • 分布式多参数光纤传感需要高信号噪声比 (SNR) 来进行准确的测量.
    • 传统方法在SNR方面面临局限性,尤其是在长途旅行中.
    • 阶段敏感的光学时域反射计 (φ-OTDR) 是分布式传感的一个关键技术.

    研究的目的:

    • 提出和演示一个增强的混合分布式多参数光纤传感系统.
    • 用分布式布里卢恩放大来改善雷利逆向散射的SNR.
    • 为了实现同时分布式的声学和温度传感.

    主要方法:

    • 使用连续光学声链 (OCC) 作为布里卢恩,用于统一的探头脉冲放大.
    • 使用Brillouin损失方案从OCC中提取温度信息.
    • 实施OCC.的60 ns段时间和250 MHz扫描范围.
    • 在50公里的单模光纤上进行实验.

    主要成果:

    • 在光纤端实现了 φ-OTDR 的 SNR 10 dB 的增强.
    • 已证明分布式声学传感具有64 pε/Hz1/2的应变灵敏度.

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  • 实现了0.2°C精度的分布式温度传感.
  • 在50公里的光纤上保持了6米的空间分辨率.

    • 结论:

    • 拟议的增强混合分布式传感系统显著改善了SNR.
    • 该系统有效地实现了同时分布式的声学和温度传感.
    • 这种方法为远程,多参数光纤传感提供了强大的解决方案.