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基于光学相锁环的光纤激光应变传感器.

Wei Jin, Yibo Zhang, Yifan Qin

    Optics letters
    |October 13, 2023
    PubMed
    概括

    我们开发了一种新的光纤激光传感器 (FLS),使用光学相锁循环 (OPLL) 技术进行高分辨率的应变测量. 这种先进的传感器实现了皮科列车分辨率,非常适合地质物理研究.

    科学领域:

    • 光子学和光学传感器
    • 计量学 计量学 计量学
    • 地质物理学 地质物理学

    背景情况:

    • 纤维激光传感器 (FLS) 对于精确的测量至关重要.
    • 现有的询问技术在应变分辨率和噪声性能方面存在局限性.
    • 对于敏感的地质物理应用,需要先进的传感方法.

    研究的目的:

    • 介绍一种基于光纤激光 (FLS) 的新型传感器,具有增强的应变分辨率.
    • 引入一个新的光学相锁循环 (OPLL) 询问技术,用于FLS解调.
    • 为了证明传感器在地球物理研究中高精度应变测量的能力.

    主要方法:

    • 使用分布式反 (DFB) 纤维激光器作为应变传感的主激光器.
    • 使用纤维法布里-佩罗干扰仪 (FFPI) 作为通过PDH技术激光载体锁定的参考.
    • 实现了光学相锁循环 (OPLL) 技术,使用根平均平方探测器 (RMSD) 来对DFB传感元件进行奴隶激光锁定.

    主要成果:

    • 在10秒内实现了8.19 pε/√Hz在1 Hz和35.5 pε的高应变分辨率.
    • 观察到1 / f噪声分布低于0.2Hz,归因于功率低和主动恒温器控制.
    • 证明了OPLL审讯技术对FLS调节的有效性.

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    结论:

    • 新的OPLL审讯技术显著提高了FLS中的应变分辨率.
    • 开发的FLS表现出精确的延展测量的优异性能.
    • 这种传感器是一种强大的工具,在地球物理研究中具有潜在的应用.