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Tilted Fibre Bragg Grating sensors. Application in monitoring of the chemical fabrication of nanometer metal films.

机译：倾斜式光纤布拉格光栅传感器。在监测纳米金属膜化学制造中的应用。

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摘要

An accurate and efficient sensing platform based on a tilted fibre Bragg gratings (TFBG) sensor, in particular concerning the monitoring of the chemical fabrication of nanometer metal films is presented.;In presented work the TFBG is used to monitor the fabrication of the nanoscale metal layers on the outside of the fibre cladding, that will eventually be used for sensing by metal-coated fibres. The sensor calibration is done by relating the fabricated metal film thickness, measured by Atomic Force Microscopy, to the spectral response of the sensor. Measurements using linearly polarized were determined to be crucial for the accurate monitoring of gold coatings with thicknesses ranging from1 to 50 nm.;The developed sensing platform is capable of acquiring the optical response of the sensor at 50 different states of linearly polarized light, within a 10 second interval. Changes in metal film thickness as small as 1 nm were detected during the real-time monitoring of an electroless metal plating process.;This possibility opens the way of creating TFBG-based surface plasmon resonance sensors, where the thickness of the metal coating is precisely tuned to obtain the plasmon resonance in the working range of the TFBG sensor.;TFBGs have grating planes that are tilted relative to the fiber's transverse axis thereby causing the excitation of several tens of cladding mode resonances, each uniquely addressed by its wavelength. The large differential sensitivity of the core and cladding modes to various perturbations allows the development of very accurate fiber sensors with a unique set of advantages and wide operating range.;In order to get a physical insight into the processes occurring in the sensor, a numerical method was developed for a fast and accurate solution to the sensor's electromagnetic field structure problem, and a mode coupling technique was introduced for the theoretical prediction of the sensor's spectral response.
机译：提出了一种基于倾斜光纤布拉格光栅（TFBG）传感器的准确高效的传感平台，特别是涉及对纳米金属膜化学制造的监控。;在所提出的工作中，TFBG用于监控纳米级金属的制造光纤包层外部的层，将最终用于金属涂层光纤的传感。传感器校准是通过将原子力显微镜测量的金属膜厚度与传感器的光谱响应相关联来完成的。确定使用线性偏振的测量对于精确监控厚度范围从1到50 nm的金镀层至关重要。;开发的传感平台能够在线性偏振光的50种不同状态下获取传感器的光学响应10秒间隔。在实时监测化学镀金属过程中检测到的金属膜厚度变化仅为1 nm。这种可能性为创建基于TFBG的表面等离振子共振传感器提供了可能，其中金属涂层的厚度精确TFBG具有相对于光纤横轴倾斜的光栅平面，从而激发了数十个包层模式谐振，每个谐振都由其波长来解决。纤芯和包层模式对各种扰动的巨大差异灵敏度允许开发非常精确的光纤传感器，具有一组独特的优势和宽广的工作范围。为了对传感器中发生的过程进行物理洞察，需要使用数值开发了一种方法来快速，准确地解决传感器的电磁场结构问题，并引入了一种模式耦合技术来对传感器的光谱响应进行理论预测。

著录项

  • 作者

    Bialiayeu, Aliaksandr.;

  • 作者单位

    Carleton University (Canada).;

  • 授予单位 Carleton University (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.A.Sc.
  • 年度 2010
  • 页码 91 p.
  • 总页数 91
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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