微结构光纤长周期光栅的制备与传感特性研究

发布时间：2018-01-15 04:32

本文关键词：微结构光纤长周期光栅的制备与传感特性研究　出处：《中国计量学院》2015年硕士论文　论文类型：学位论文

【摘要】：微结构光纤长周期光栅是通过在微结构光纤上沿长度方向引入周期性的折射率调制从而实现基模到包层模耦合的一种光纤器件。随着微结构光纤的研究发展,基于微结构光纤的长周期光棚的制备和应用近几年来成为热点。本文在文献阅读和调研的基础上,对微结构光纤长周期光栅的制备技术和传感特性进行了较详细的研究,在柚子型和边孔型微结构光纤上成功制备获得了长周期光纤光栅,并分别对其传感特性进行了具体研究,为其传感应用奠定了基础。论文具体内容如下：1、通过查阅与长周期光纤光栅、微结构光纤、微结构光纤长周期光栅有关的学术论文及其他文献,对微结构光纤长周期光栅的发展历程及研究现状进行了综述,并介绍了其在传感方面的应用。2、对长周期微结构光纤光栅的基本理论进行了分析,介绍了长周期光纤光栅的耦合模理论的基础上,考虑到CO2激光器脉冲法制备微结构光纤时,微结构光纤包层发生强烈的空气孔塌陷,使用局域耦合模理论来补充修正模式耦合理论,得出强折射率调制下的模式耦合方程以及谐振波长公式修正,为其在传感方面的应用提供了理论依据。3、在综合分析研究制备长周期微结构光纤光栅的多种方法基础上,选用CO2激光器加热法在柚子型微结构光纤和边孔型微结构光纤上成功制备了长周期光纤微结构光栅,为研究其传感特性提供了样品。4、实验研究了柚子型微结构光纤光栅和长周期边孔型微结构光纤光栅的温度、折射率、弯曲传感特性,结合其对不同参量的传感原理对实验结果进行了分析和讨论,为其传感应用奠定了基础。总之,本文从理论、实验制备和特性研究三个方面对基于微结构光纤的长周期光纤光栅进行了研究,对提高微结构光纤长周期光栅的制备工艺,推动其在传感领域的应用具有重要意义。
[Abstract]:Microstructured fiber long period grating is a kind of fiber device which can realize the coupling between the base mode and the cladding mode by introducing periodic refractive index modulation along the length of the microstructured fiber. The fabrication and application of long-period light shed based on microstructured fiber has become a hot topic in recent years. The fabrication technology and sensing characteristics of microstructured fiber long period grating were studied in detail. Long period fiber gratings were successfully fabricated on grapefruit and edge-shaped microstructured fiber. And the sensing characteristics of the sensor were studied, which laid a foundation for its sensing applications. The specific content of the thesis is as follows: 1, through the reference and long period fiber grating, micro-structure fiber. In this paper, the development and research status of microstructured fiber long period grating are reviewed, and its application in sensing is introduced. The basic theory of long-period microstructured fiber gratings is analyzed. Based on the coupled mode theory of long-period fiber gratings, the CO2 laser pulse method is considered to fabricate micro-structured fiber. There is a strong air hole collapse in the microstructured fiber cladding. The local coupling mode theory is used to supplement the modified mode coupling theory and the mode coupling equation and the resonant wavelength formula are obtained under the strong refractive index modulation. It provides a theoretical basis for its application in sensing. 3. On the basis of comprehensive analysis and research on the preparation of long-period microstructured fiber Bragg grating (LPFG). The CO2 laser heating method was used to fabricate long-period fiber microstructural gratings on grapefruit microstructured fiber and edge-shaped microstructured fiber successfully, which provided a sample of .4 for studying its sensing characteristics. The temperature, refractive index and bending sensing characteristics of grapefruit microstructured fiber gratings and long-period edge-shaped microstructured fiber gratings are experimentally studied. The experimental results are analyzed and discussed based on the sensing principle of different parameters, which lays a foundation for the application of the sensor. In this paper, we study the long-period fiber grating based on micro-structure fiber in three aspects: experimental preparation and characteristic study, and improve the fabrication technology of micro-structure fiber long-period grating. It is of great significance to promote its application in the field of sensing.
【学位授予单位】：中国计量学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN253

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