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激光频率噪声校正在基于LFM的干涉度光纤光纤液电话阵列中.

Mengyuan Zhao, Ying Mao, Zexu Wang

    Optics express
    |September 15, 2023
    PubMed
    概括

    我们为光纤水声器开发了一种新的时分复合 (TDM) 阵列,该阵列可以减少白噪声并纠正激光频率噪声. 这项创新将相位噪声底部提高至少2dB.

    科学领域:

    • 光学工程是指光学工程.
    • 声学传感 声学传感 声学传感
    • 信号处理 信号处理

    背景情况:

    • 介面计光纤水声机易受激光频率噪声引起的相位噪声的影响.
    • 传统方法使用参考探针校准传感器数据,但引入显著的白噪声.
    • 现有的系统需要具有非常窄的线宽的激光器,增加成本和复杂性.

    研究的目的:

    • 为大规模光纤水电话系统提出一种新的时分复合 (TDM) 阵列.
    • 引入功率优化的参考探头,以减少白噪声和纠正激光频率噪声.
    • 为了缓解干扰度水声机中使用的激光器的严格线宽要求.

    主要方法:

    • 使用功率优化的参考探针实现一个TDM阵列.
    • 参考探头的回声相对于其他传感器而言被放大,以减轻引入的白噪声.
    • 将新型阵列设计应用于使用线性频率调制 (LFM) 光源的光纤电话.

    主要成果:

    • 新型阵列设计显著降低了由额外的白噪声引起的相位噪声底部恶化,将其从至少3dB提高到1dB.
    • 参考探头的功率优化有效地减少了白噪声,并纠正了相位噪声.
    • 该系统成功地允许使用带宽为338.06 MHz的激光器,取代了需要1.417 kHz的带宽激光器的需求,同时保持相同的解调噪声底线.

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    结论:

    • 拟议的带有功率优化的参考探针的TDM阵列为大规模光纤水电话系统提供了强大的解决方案.
    • 这种方法有效地减轻了白噪声和激光频率噪声,提高了系统性能.
    • 开发的方法大大放松了激光线宽要求,使得使用更便宜,更容易获得的激光器成为可能.