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相关概念视频

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

38
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
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缓慢波增强的芯片上的迈克尔森干扰仪传感器.

Jianhao Shen, Daniel Donnelly, Swapnajit Chakravarty

    Optics letters
    |November 15, 2023
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    概括

    新的不对称迈克尔森干扰仪 (MI) 传感器利用慢光技术显著提高相位灵敏度. 与传统的马赫-泽恩德干扰仪 (MZI) 相比,这种进步为干扰计传感应用提供了更好的性能.

    科学领域:

    • 光学和光子学 在光学和光子学.
    • 干涉测量是干涉测量的方法.
    • 纳米光子学 纳米光子学

    背景情况:

    • 干扰仪传感器对于精确的测量至关重要.
    • 提高相位灵敏度是提高传感器性能的关键.
    • 慢光现象为光学传感技术的进步提供了潜力.

    研究的目的:

    • 在非对称的迈克尔森干扰仪 (MI) 传感器中实验证明增强的相位和光谱灵敏度.
    • 研究慢光和反射路径增强对传感器灵敏度的影响.
    • 将MI传感器的性能与光子晶体波导与传统的马赫-泽恩德干扰仪 (MZI) 进行比较.

    主要方法:

    • 使用光子晶体波导制造芯片上的慢光迈克尔森干扰仪传感器.
    • 在不对称MI传感器中测试相位灵敏度的实验测量.
    • 实验结果与理论计算和MZI性能进行比较.

    主要成果:

    • 在MI传感器中实验证明了277,750rad/RIU-cm的相位灵敏度.
    • 实现了高达461,810rad/RIU-cm的理论相位灵敏度.
    • 与MZIs (84,000 rad/RIU-cm) 相比,观察到相位灵敏度的显著提高.

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  • 保持与MZIs相同的形式因子,具有相同的干扰仪臂长.

    • 结论:

    • 在不对称的MI传感器中,慢波增强显著提高了相位和光谱灵敏度.
    • 在芯片上的光子晶体波导使得干扰测量传感的实质性改进.
    • 低光MI传感器为折射率传感应用提供了卓越的性能.