基于980nm半导体激光器光束准直系统的.docVIP

毕业设计说明书 基于980nm半导体激光器 光束准直系统的设计 学生姓名： 学号： 学 院： 专 业： 指导教师： 2012年 6 月 基于980nm半导体激光器光束准直系统的设计 摘要：半导体激光器具有体积小、重量轻、功耗低和可直接调制等优点，在激光雷达、激光通信、固体激光器的抽运、激光泵浦、激光扫描、激光测距、激光指挥笔等方面得到了非常广泛的应用。 由于半导体激光器的结构特点，使得它发出的光束在垂直于结平面方向上远场发散角和平行于结平面方向的远场发散角相差较大。所以在几乎所有要求较高的应用领域中，其输出光束都必须通过特殊的光学系统进行准直。 柱透镜因其结构简单、材料便宜以及加工容易而在半导体激光束准直领域获得较多的应用，但普通的柱透镜其准直能力非常有限，为了提高柱透镜的光束准直能力，就有必要设计出更加合理和可行的结构。 在本文中，基于柱透镜对半导体激光器光束准直的理论分析，设计了相互正交的柱透镜组作为设计模型，对980nm半导体激光器进行光束准直，并且利用ZEMAX软件对设计系统各部分准直效果进行模拟。 关键字：半导体激光器，光束准直，柱透镜，高斯光束 Based on the 980nm semiconductor laser beam collimation system design Abstract：Owing to its compactness，lightness,and low cost,semiconductor laser play an important role as coherent source in various fields of technology such as military,industry and medicine use and so onHowever,the output beam quality of semiconductor laser is poor．Because of the waveguide properties of their active areas,semiconductor lasers generate large divergence-angle beams with alliptically shaped intensity profile.And the beam of semiconductor laser has astigmatism.So,the output beam must be collimated by optical systems in most practical work. Because of simple structure and easy fabricating，the cylindrical lenses have been used in many practical applications for beam collimating of semiconductor lasers. In this paper, Based on the cylindrical lens for semiconductor laser beam collimation theory analysis, Design of orthogonal cylindrical lens group as a design model, The 980nm semiconductor laser beam collimation,and using the ZEMAX software to the design of each part of the system of collimating and shaping effects simulation. Key words：Semiconductor Laser,Beam collimation, Cylindrical lens Gaussian beam  目 录 1 绪论…………………………………………………………………………………… 1 1.1 选题目的及意义…………………………………………………………………… 1 1.2 980nm半导体激光器的发展及其应用…………………………………………… 1 1.2.1 半导体激光器发展史…………………………………………………………… 1 1.2.2 980nm