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首页> 外文期刊>Optical engineering >Enhanced sensitivity of fiber optic evanescent wave absorption-based concentration sensor by shining a Bessel Gauss beam and effect of fiber bending on the sensor response: a theoretical analysis
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Enhanced sensitivity of fiber optic evanescent wave absorption-based concentration sensor by shining a Bessel Gauss beam and effect of fiber bending on the sensor response: a theoretical analysis

机译：通过照射贝塞尔高斯光束提高光纤and逝波吸收式浓度传感器的灵敏度，以及光纤弯曲对传感器响应的影响：理论分析

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摘要

We present a theoretical perspective on the notion of a highly sensitive multimode fiber optic evanescent wave absorption-based sensor by exploiting a zero-order Bessel-Gauss beam to determine the concentration of sodium chloride (NaCI) from its aqueous solution. The phenomenon of excited waveguide modes inside the sensor structure has been assessed by using a classical wave-optic model. By harnessing the advantages of the Bessel-Gauss beam, the difference in transmitted output power is evaluated for various concentrations of NaCI, ranging from 0 to 360 g/L. To corroborate our theoretical predictions, the computer-aided simulation in Mode Solutions software has been performed on the proposed sensing configuration. In contrast to the conventional concentration sensor using Gaussian beam, the projected scheme yields a maximum 14.40-fold superior sensitivity of 0.072 dB/gL~(-1) with a commendable sensing resolution of ~0.013 g/L Also, attention has been paid to the Bessel-Gauss beam shined U-bent fiber-optic absorption-based concentration sensor, where the sensor response has been numerically investigated for different bending radii, and it is concluded that the sensitivity can be enhanced appreciably by gently reducing the bending radius. Due to ultrahigh sensitivity, the present paradigm is very much alluring and evocative, establishing pivotal implication in chemical and biological sensing fields.
机译：我们通过利用零级贝塞尔-高斯光束确定其水溶液中氯化钠（NaCI）的浓度，提出了一种基于高灵敏多模光纤e逝波吸收传感器的理论观点。已经通过使用经典的波光模型评估了传感器结构内部的激发波导模式的现象。利用贝塞尔高斯光束的优势，可以评估各种浓度的NaCl（从0到360 g / L）的透射输出功率差异。为了证实我们的理论预测，已在Mode Solutions软件中对建议的传感配置进行了计算机辅助仿真。与使用高斯光束的常规浓度传感器相比，该投影方案可产生最大的14.40倍的超高灵敏度，为0.072 dB / gL〜（-1），可感测的分辨率约为〜0.013 g / L。 Bessel-Gauss光束照亮的U型弯曲光纤吸收型浓度传感器，通过对不同弯曲半径的传感器响应进行了数值研究，得出的结论是，通过减小弯曲半径可以显着提高灵敏度。由于具有超高的灵敏度，目前的范例非常诱人且令人回味，在化学和生物传感领域确立了关键意义。

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  • 来源
    《Optical engineering》 |2019年第5期|056112.1-056112.12|共12页
  • 作者

    Arijit Datta; Appasani Mahendra Babu; Ardhendu Saha;

  • 作者单位

    CMR Institute of Technology, Department of Electrical and Electronics Engineering, Bengaluru, Karnataka, India;

    National Institute of Technology, Department of Electrical Engineering, Agartala, Tripura, India;

    National Institute of Technology, Department of Electrical Engineering, Agartala, Tripura, India;

  • 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

    fiber optic sensors; fiber optics; sensors; modes; fiber optic applications;

    机译：光纤传感器;光纤;传感器模式;光纤应用;

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