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智能化宽频带可调谐激光器的研制
Research & Develop of Inntelligent Wide-Band Tunable Laser
【作者】 刘长娥;
【导师】 黄骝;
【作者基本信息】 北京工业大学 , 光学, 2002, 硕士
【摘要】 本文围绕着北京市自然科学基金项目,对智能化宽频带可调谐激光器进行了理论和实验两方面的研究,并初步研制出两台实验样机。 本文理论部分主要作了有关光参量效应方面的研究,探讨了光参量振荡器的物理机制、参量振荡的归一化耦合波方程,求解得到了参量振荡器的耦合波函数,同时对光参量振荡的增益模式进行了分析,研究了使参量振荡的阈值条件,并对光参量振荡器的输出特性进行了分析,得到了特性曲线。另外,本文还从事了非线性晶体的特性分析和研究,通过分析,恰当地选择了适合实验的非线性晶体。 本文的实验部分主要侧重于智能化光参量系统的光学部分、计算机控制数据采集闭环系统以及计算机控制反馈技术的研究。在光学部分,本论文利用现有实验条件进行了参量振荡器频率调谐的研究,得到了调谐曲线,并做了输出参量光的能量转换效率以及输出功率的实验,得到一系列特性曲线。在激光器智能化研究方面,采用差分法数据采集原理,利用微机数据采集技术,设计了参量光智能化数据采集闭环系统的硬件部分和软件部分,完成了智能化数据采集系统的设计。同时,本文在高精度的调谐机构的基础上,利用计算机控制反馈技术,设计了速度式PID控制器,完成了闭环反馈控制系统的设计,实现了输出参量光信号采集和反馈的目的。
【Abstract】 In this paper, we have studied the theory and experiment of intelligent wide-band tunable laser around Beijing Natural Science Foundation Proposed Program and developed two testing laser system .In the section of theory, we mainly studied optical parameter effect, discussed physical mechanism of optical parameter laser and normalized coupled wave equation and got the solution. We also carried out the analysis of gain mode of optical parameter oscillation, studied the threshold condition, analyzed output characteristics and then achieved characteristic curve. In addition, we researched the characteristic of nonlinear crystal. An appropriate nonlinear crystal has been chosen through research.In the section of experiment, we focused on the research of optical system of optical parameter oscillation, computer controlling data sampling closed-circuit system and technology of computer controlling feed-back .In the section of optics, we used present condition to do the experiments about optical parameter effect and got a series of characteristic curve on power transition efficiency and output power. In research of intelligent laser, we used difference method to gather data and technology of computer sampling data to design intelligent optical parameter sampling data closed-circuit system. At the same time we based on the high precision tuning mechanism and computer controlling feed-back technology to design PID controller. So, we finished design of closed-circuit controlling system and achieved the goal of sampling and feedback.
【Key words】 optical parameter resonator; difference method; PID controller;
- 【网络出版投稿人】 北京工业大学 【网络出版年期】2002年 02期
- 【分类号】TN248
- 【下载频次】102