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首页> 外文期刊>Optical engineering >Fiber modal Michelson interferometers with coherence addressing and heterodyne interrogation
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Fiber modal Michelson interferometers with coherence addressing and heterodyne interrogation

机译：具有相干寻址和外差询问的光纤模态迈克尔逊干涉仪

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摘要

A long-period-grating-based fiber optic Michelson modal interferometer with coherence addressing and heterodyne interrogation is studied as a sensing structure for measuring environmental refractive index, temperature, and liquid level. The effects of several system parameters on the measurements are investigated. Experimental results show that the sensitivity to the external refractive index increases with the order of cladding mode and with a reduction of the fiber diameter. The decrease of the fiber diameter from 125 μm down to 70 μm enhances the sensitivity to the external index by a factor of 2.7. It is also shown that the use of a silica-core fiber increases the sensitivity to the external index by a factor of 1.4 and reduces the thermal sensitivity by a factor of 2.5 compared to a standard fiber.
机译：研究了一种基于长光栅的光纤迈克尔逊模式干涉仪，该干涉仪具有相干寻址和外差询问功能，可作为测量环境折射率，温度和液位的传感结构。研究了几个系统参数对测量的影响。实验结果表明，对外部折射率的敏感度随包层模序的增加和光纤直径的减小而增加。纤维直径从125μm减小到70μm，对外部折射率的敏感度提高了2.7倍。还显示，与标准纤维相比，使用二氧化硅芯纤维对外部折射率的敏感度提高了1.4倍，而使热敏感度降低了2.5倍。

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  • 来源
    《Optical engineering》 |2008年第4期|044401.1-044401.7|共7页
  • 作者

    Paulo Caldas; Pedro A. S. Jorge; F. M. Araujo; Luis A. Ferreira; Manuel B. Marques; Gaspar Rego; Jose Luis Santos;

  • 作者单位

    Universidade do Porto Departamento de Fisica da Faculdade de Ciencias INESC Porto - Instituto de Engenharia de Sistemas e Computadores do Porto Rua do Campo Alegre 687 4169-007 Porto, Portugal Escola Superior de Tecnologia e Gestao de Viana do Castelo Av. do Atlantico, Apartado 574 4900-348 Viana do Castelo;

    INESC Porto - Instituto de Engenharia de Sistemas e Computadores do Porto Rua do Campo Alegre 687 4169-007 Porto, Portugal;

    INESC Porto - Instituto de Engenharia de Sistemas e Computadores do Porto Rua do Campo Alegre 687 4169-007 Porto, Portugal;

    INESC Porto - Instituto de Engenharia de Sistemas e Computadores do Porto Rua do Campo Alegre 687 4169-007 Porto, Portugal;

    Universidade do Porto Departamento de Fisica da Faculdade de Ciencias and INESC Porto - Instituto de Engenharia de Sistemas e Computadores do Porto Rua do Campo Alegre 687 4169-007 Porto, Portugal;

    Universidade do Porto Departamento de Fisica da Faculdade de Ciencias Rua do Campo Alegre 687 4169-007 Porto, Portugal Escola Superior de Tecnologia e Gestao de Viana do Castelo Av. do Atlantico, Apartado 574 4900-348 Viana do Castelo, Portugal;

    Universidade do Porto Departamento de Fisica da Faculdade de Ciencias INESC Porto - Instituto de Engenharia de Sistemas e Computadores do Porto Rua do Campo Alegre 687 4169-007 Porto, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    long-period grating; modal interferometer; refractive index; coherence addressing; heterodyne interrogation;

    机译：长周期光栅模态干涉仪折射率一致性处理;外差询问;

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