【作者】 王为梁；

【导师】 焦明星；

【作者基本信息】 西安理工大学 ， 精密仪器及机械， 2010， 硕士

【摘要】 单频固体激光器具有体积小、效率高、光束质量好、寿命长等优点,得到了广泛的应用。单频固体激光器输出功率稳定控制系统是保证单频固体激光器正常工作的重要系统,其性能对单频固体激光器的正常使用和光束质量等有很大影响,也是单频固体激光器广泛应用的关键技术之一。本文在分析影响单频固体激光器输出功率稳定因素的基础上,设计了一种新型单频固体激光器输出功率稳定控制系统。该系统采用L01型集成光电传感器为功率探测元件,18B20型数字温度传感器为温度探测元件,以高性能微处理器ADuC848为核心对单频固体激光器输出功率进行稳定控制。论文主要内容包括以下几个方面：第一,概述了单频固体激光器输出功率稳定控制技术的研究现状及意义,确定了本论文的研究内容及设计要求。第二,简要介绍了单频固体激光器的系统组成和工作原理,分析了影响单频固体激光器输出功率稳定的主要因素。分析结果表明：泵浦源——半导体激光器(LD)和激光晶体的温度变化及LD注入电流的波动是影响单频固体激光器输出功率稳定性的主要因素。在此基础上设计了单频固体激光器输出功率控制方案。即先稳定LD和激光晶体温度,再根据当LD温度恒定,注入电流大于阈值电流时,LD的输出功率和注入电流成线性关系这一特点,对单频固体激光器的输出功率进行稳定控制。第三,设计了单频固体激光器输出功率稳定控制系统的硬件电路和软件系统,其中主要包括温度和功率的采集,处理,显示和输出等部分。并对所设计的硬件系统和软件系统进行了调试。最后,建立了单频固体激光器输出功率稳定控制测试系统,并进行了实验研究。研究结果表明：在130分钟内,1064nm单频Nd：YAG激光器输出功率的稳定性达到1.29%,满足本论文设计要求。本论文研究设计的单频固体激光器输出功率稳定控制系统设计合理,具有集成度高、控制效果好、工作可靠等优点,具有很好的工程应用价值。更多还原

【Abstract】 Single-frequency solid-state laser is widely used for its advantages of small volume, high efficiency, good beam quality, and long longevity etc. Output power control system is the important equipment for single-frequency solid-state laser normally working. Its performance has large influence on the solid-state laser’s characteristics such as the conversion efficiency and beam quality etc. It is a key technology for single-frequency solid-state laser to be widely used.On the basis of analyzing the characteristics of which affect the stability of the output power, a new type of single-frequency solid-state laser output power control system has been designed in this thesis. A control system uses the L01 integrated sensor as output power sensor, the 18B20 digital thermometer as temperature sensor and a high performance microprocessor ADuC848 as a control core, to control the single-frequency solid-state laser’s output power. The main contents of the thesis are as follows:Firstly, the research status and significance of single-frequency solid-state laser output power stability control system have been summarized. The content and design requirements of this thesis have been confirmed.Secondly, the working principle and composition of single-frequency solid-state laser have been introduced. The factors that affect the output power of single-frequency solid-state laser have been analyzed. The results indicate that the temperature changing of LD and laser crystal, the fluctuations of LD injection current are the main factors that affect the stability of its output power. Based on this, the Control program of stable single-frequency solid-state laser output power has been developed, that is, the LD and the laser crystal temperature should be stabled firstly, and then based on the linear relation characteristics between output power and injection current of LD when injection current is greater than the threshold current, the stability control of the single-frequency solid-state laser output power are executed.Thirdly, the single-frequency solid-state laser output power control system hardware and control software have been designed. System mainly includes the collection, processing, display and output sections of temperature and power. The hardware and software system have been debugged.Lastly, the test system is built. The effect of control system is examined experimentally. The results indicate that the outpower of 1064nm single-frequency Nd:YAG laser can be controlled in 130 minutes with a stability of 1.29%.The single-frequency solid-state laser output power control system has been researched and developed in this thesis. With the advantages of high integration, good effect, reliable working etc, the system has good engineering value.更多还原