TO-CAN封装的半导体激光器的热分析及温控研究

发布时间：2018-06-19 06:37

本文选题：半导体激光器 + TO_CAN　；参考：《山东大学》2015年硕士论文

【摘要】：半导体激光器由于具有体积小、重量轻、效率高、可靠性强等优点,已经成为当今光电子科技的发展核心。但是由于半导体激光器在工作时存在着各种原因造成的损耗,使其有部分电能会转化为热能,从而引起激光器的温度升高。激光器的温度升高会对它的阈值电流、输出功率和使用寿命等产生影响,因此在半导体激光器的研究中,对它的温度控制成为一个重要的研究方向。半导体制冷器(TEC)是利用半导体的热电效应来进行温度控制的器件。它具有(1)结构简单,体积小,重量轻；(2)制冷速度快,方便控制；(3)不使用制冷剂,绿色环保；(4)具有可逆性,通过改变工作电流方向就可以控制加热、制冷等特点。由于这些优点,半导体制冷器在很多领域都得到迅速的发展。特别是当半导体制冷器的小型化取得巨大的进展后,它的量级可以达到毫米级,这就使它成为半导体激光器的最佳温控选择之一。本文针对TEC工作和不工作这两种情况进行了仿真。当TEC不工作时,设置不同的外界环境温度,对TO_CAN模型进行稳态和瞬态热分析。通过温度场云图观察TO_CAN模型的温度分布情况,通过温度时间曲线观察温度随时间的变化趋势。当TEC工作时,针对TEC功率不变和改变两种情况进行仿真。首先设置TEC的功率为一个恒定的值,对比TEC工作与TEC不工作时TO_CAN模型的温度变化情况。第二,为了能方便的控制温度,设计了一种动态控制TEC功率的方法。它可以根据检测到的温度调整TEC的功率,调节内部温度尽快达到稳态。最后,提出了一种改进的动态控制TEC功率的方法-“多级控制法”,它将检测到的温度进一步细化,在不同的温度范围采取不同的调控措施,该方法与上一种方法相比,收敛速度更快,收敛性更好。
[Abstract]:Semiconductor lasers have become the core of optoelectronic technology due to their small size, light weight, high efficiency and high reliability. However, due to the loss of semiconductor laser due to various reasons, some of its electrical energy will be converted into heat energy, which will cause the temperature of the laser to rise. The temperature rise of the laser will affect its threshold current, output power and service life. Therefore, in the study of semiconductor lasers, temperature control has become an important research direction. Semiconductor cooler (TECs) is a kind of device which uses thermoelectric effect of semiconductor to control temperature. It has the advantages of simple structure, small volume, light weight, high speed of refrigeration, convenient control without using refrigerant, green environmental protection and 4) reversibility. Heating and refrigeration can be controlled by changing the direction of working current. Because of these advantages, semiconductor refrigerators have been developed rapidly in many fields. Especially when the miniaturization of semiconductor refrigerators has made great progress its order of magnitude can reach millimeter which makes it one of the best temperature control options for semiconductor lasers. In this paper, the TEC working and non-working two cases are simulated. When TEC does not work, the steady state and transient thermal analysis of TOCs can model is carried out by setting different ambient temperature. The temperature distribution of Toji can model was observed by the temperature field cloud diagram, and the change trend of temperature with time was observed by the curve of temperature and time. When the TEC is working, the TEC power invariance and change are simulated. Firstly, the power of TEC is set to a constant value, and the temperature change of TEC can model is compared with that of TEC when TEC is not working. Secondly, in order to control the temperature conveniently, a dynamic control method of TEC power is designed. It can adjust the power of TEC according to the detected temperature and adjust the internal temperature to steady state as soon as possible. Finally, an improved method of dynamic control of TEC power, "multistage control method", is proposed. It further refines the detected temperature and takes different control measures in different temperature ranges. The method is compared with the previous method. The convergence rate is faster and the convergence is better.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN248.4

【参考文献】