【作者】 沈渊；

【导师】 邓琦林； 胡企铨；

【作者基本信息】 上海交通大学 ， 机械工程， 2011， 硕士

【摘要】 半导体泵浦532nm激光器已经越来越广泛地应用于材料加工、医疗和军事等领域,其工作的稳定性和可靠性在系统应用中起着关键作用。但是半导体泵浦532nm激光器的性能受温度的影响很大,因此其热问题一直是人们关注的焦点之一。特别是近年来,半导体泵浦532nm激光器的发展趋势向小型化,高功率的方向发展,其对传热特性与温度控制技术提出了新的要求。本文首先简单回顾了半导体泵浦532nm激光器的发展和应用,介绍了半导体泵浦532nm激光器的温度特性,阐述了温控对于半导体泵浦532nm激光器的重要性和目前半导体激光器的主要温控手段。介绍了目前半导体泵浦532nm激光器的市场状况,回顾了有限元方法在半导体激光器传热特性研究中的应用情况。其次,叙述了热电制冷的原理以及热电制冷在设计中具体应用,建立了热电制冷的半导体泵浦532nm激光器控温部分的数学模型,然后在半导体泵浦532nm激光器控温部分的设计中,通过引入有限元分析(FEM)的方法,使用ANSYS有限元分析软件,通过稳态热模拟和瞬态热模拟对控温部分结构进行热分析,并且在数学模型的指导下对结构进行了优化和热分析。研究结果表明:在同样的制冷量输入下,优化后控温部分的稳态控温能力提高了8%左右,瞬态的作用时间提高了33%,较初始结构有明显改善。最后,根据优化后的结构制作了实验装置,并且对实验装置的控温能力进行了测试。通过对比实验测试数据和ANSYS热模拟的数据,确认相互之间的误差约在10%左右;结果表明,有限元分析的应用在改善热电制冷的半导体泵浦532nm激光器控温部分性能有明显的效果,有助于缩短产品的开发周期、提高产品性能、降低研发成本、提高客户满意度。更多还原

【Abstract】 532nm DPSS Laser with thermoelectric cooler is widely used in material process, medical treatment and military affairs etc. In order to ensure the stability and reliability of 532nm DPSS Laser, it is very important to set and maintain a stable temperature. So the problem about heat is always the focus of attention.In the paper, the development and application of DPSS laser were introduced simply at the beginning. It is described that temperature control for 532nm DPSS Laser is important. The market condition of 532nm DPSS Laser is introduced. Then it analyzes temperature characteristics of 532nm DPSS Laser and temperature control techniques of 532nm DPSS Laser are compared at present.Next, the principle of thermoelectric cooler was explained and the appliance to use the thermoelectric cooler was introduced. In the 532nm DPSS Laser, the mathematical model of part of temperature control is established. Then, the design process of 532nm DPSS Laser with thermoelectric cooler applies finite element analysis (FEM) method for optimization temperature controlling performance. Using ANSYS, kind of finite element analysis software, did thermal analysis of the temperature controlling structure by steady-state thermal simulation and transient thermal simulation and optimize the structure on the basis of analytic result. The results show that the cooling capacity in the same input, steady-state temperature controlling capacity of the optimized temperature controlling structure arise approximate 8% and action time of transient temperature controlling capacity reduce 33%, a significant improvement over the initial structure.Finally, an experimental device on basis of optimized structure was made and temperature controlling capacity of it has been tested. By comparing the experimental data and ANSYS thermal simulation data, the error is less than 10% each other. The result show that finite element analysis to improve the temperature controlling performance of 532nm DPSS Laser with thermoelectric cooler has a significant effect, towards shortening product development cycles, improve performance, reduce development costs, improve customer satisfaction has importance.更多还原