利用堆积法制备光子晶体光纤的工艺研究

发布时间：2018-11-06 08:34

【摘要】： 光子晶体光纤(PCF)是二十世纪最新的科技成果之一,PCF的研究与应用已经成为当今世界热门的研究领域。尤其是最近十年,世界上对PCF的研究十分广泛,已经被广泛地应用于光纤通信、光学器件、医学检查等各个方面。但是,PCF的制备方法和它的理论发展相比,进展却十分缓慢。本文主要是针对PCF的制备工艺进行分析和设计。首先,介绍了PCF的概念、分类、特性和制备技术的发展等,分别阐述了PCF的各种制备技术和它们的优缺点,重点介绍了利用堆积法制备PCF的工艺过程和生产设备。其次,指出了在利用堆积法制备PCF的过程中存在的问题和不足,根据这些存在的问题,对拉制过程中的参数的影响进行了分析,并设计了一些简易的物理装置安装在光纤拉制塔上。分析了预制棒对PCF的影响,探索了制作预制棒的几种方法,设计了2种预制棒排布的辅助装置,利用这些装置可以有效地提高预制棒的排布速率和成功率。最后,设计了一种数字化的控制系统,实现定长剪切和自动缠绕两种功能。该系统是一种以西门子S7-200可编程序控制器作为主控制器,使用霍尔传感器、电压变送器进行信号采集,使用CO2激光器进行切割,使用电动机进行驱动的自动控制系统。软件编程采用梯形图(LAD)作为编程语言,充分利用了梯形图中的计数器、比较、跳转与标号等功能指令,实现其控制功能。其中,缠绕部分采用了PID闭环模拟控制。文章中给出了设计方法和系统框图,包括系统硬件的组态和软件的设计。对数字部分进行了实验仿真,对PID控制进行理论仿真。仿真结果表明该系统能够稳定运行,提高了光纤拉制塔的自动化水平。
[Abstract]:Photonic crystal fiber (PCF) is one of the latest scientific and technological achievements in the 20th century. The research and application of PCF has become a hot research field in the world. Especially in the last ten years, PCF has been widely studied in the world and has been widely used in optical fiber communication, optical devices, medical examination and so on. However, the preparation method of PCF and its theoretical development, progress is very slow. In this paper, the preparation process of PCF is analyzed and designed. Firstly, the concept, classification, characteristics and development of PCF are introduced. The preparation techniques of PCF and their advantages and disadvantages are described respectively, and the process and equipment of preparing PCF by stacking are emphasized. Secondly, the problems and shortcomings in the process of preparing PCF by stacking method are pointed out. According to these problems, the influence of the parameters in the drawing process is analyzed. Some simple physical devices are designed and installed on the optical fiber drawing tower. In this paper, the influence of preform rod on PCF is analyzed, several methods of making preform rod are explored, two kinds of auxiliary devices for arranging preform rod are designed, the arrangement rate and success rate of preform rod can be improved effectively by using these devices. Finally, a digital control system is designed to realize the functions of constant length shearing and automatic winding. The system is an automatic control system which uses Siemens S7-200 programmable controller as main controller, uses Hall sensor, voltage transmitter for signal acquisition, CO2 laser for cutting, and motor for driving. In software programming, ladder diagram (LAD) is used as programming language, and its control function is realized by fully utilizing the counter, comparison, jump and label of the counter in trapezoid diagram. Among them, the winding part adopts PID closed loop simulation control. The design method and system block diagram are given, including hardware configuration and software design. The digital part is simulated and the PID control is simulated theoretically. The simulation results show that the system can run stably and improve the automation level of optical fiber drawing tower.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TN253

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