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Optical carrier based microwave interferometers for sensing application

机译：基于光学载体的微波干涉仪，用于传感应用

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摘要

Optical fiber interferometers (OFIs) have been extensively utilized for precise measurements of various physical/chemical quantities (e.g., temperature, strain, pressure, rotation, refractive index, etc.). However, the random change of polarization states along the optical fibers and the strong dependence on the materials and geometries of the optical waveguides are problematic for acquiring high quality interference signal. Meanwhile, difficulty in multiplexing has always been a bottleneck on the application scopes of OFIs. Here, we present a sensing concept of optical carrier based microwave interferometry (OCMI) by reading optical interferometric sensors in microwave domain. It combines the advantages from both optics and microwave. The low oscillation frequency of the microwave can hardly distinguish the optical differences from both modal and polarization dispersion making it insensitive to the optical waveguides/materials. The phase information of the microwave can be unambiguitly resolved so that it has potential in fully distributed sensing. The OCMI concept has been implemented in different types of interferometers (i.e., Michelson, Mach-Zehnder, Fabry-Perot) among different optical waveguides (i.e., singlemode, multimode, and sapphire fibers) with excellent signal-to-noise ratio (SNR) and low polarization dependence. A spatially continuous distributed strain sensing has been demonstrated.
机译：光纤干涉仪（OFI）已被广泛用于各种物理/化学量（例如温度，应变，压力，旋转，折射率等）的精确测量。但是，沿着光纤的偏振态的随机变化以及对光波导的材料和几何形状的强烈依赖性对于获取高质量的干涉信号是有问题的。同时，多路复用的困难一直是OFIs应用范围的瓶颈。在这里，我们通过读取微波领域的光学干涉仪传感器，提出了基于光学载波的微波干涉仪（OCMI）的传感概念。它结合了光学和微波的优势。微波的低振荡频率很难将光学差异与模态和偏振色散区分开，从而使其对光波导/材料不敏感。微波的相位信息可以明确解析，因此在完全分布式传感方面具有潜力。 OCMI概念已经在具有出色信噪比（SNR）的不同光波导（即单模，多模和蓝宝石光纤）中的不同类型的干涉仪（即Michelson，Mach-Zehnder，Fabry-Perot）中实现了和低极化依赖性。已经证明了空间连续分布的应变感测。

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  • 来源
    《Fiber optic sensors and applications XI》|2014年|90980H.1-90980H.6|共6页
  • 会议地点 Baltimore MD(US)
  • 作者

    Jie Huang; Xinwei Lan; Hanzheng Wang; Lei Yuan; Hai Xiao;

  • 作者单位

    The Holcombe Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 105 Riggs Hall, Clemson, SC, 29634, USA;

    The Holcombe Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 105 Riggs Hall, Clemson, SC, 29634, USA;

    The Holcombe Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 105 Riggs Hall, Clemson, SC, 29634, USA;

    The Holcombe Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 105 Riggs Hall, Clemson, SC, 29634, USA;

    The Holcombe Department of Electrical and Computer Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, 105 Riggs Hall, Clemson, SC, 29634, USA;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fiber optic sensors; interferometry; optical carrier based microwave interferometers; microwave photonics;

    机译：光纤传感器；干涉测量基于光载波的微波干涉仪；微波光子学;

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