高峰值功率固体激光器光纤耦合技术的研究

发布时间：2018-01-03 12:27

本文关键词：高峰值功率固体激光器光纤耦合技术的研究　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：自激光器与光纤面世以来,激光与光纤的耦合技术就受到了广泛的关注与研究。半导体激光器光纤耦合技术的不断发展,使得利用光纤来传递激光光束被运用于工业、通信、医疗与军事等领域。目前,利用固体激光器光纤输出激光系统进行激光加工、焊接也已成为可能,窄脉宽的固体激光器因其高峰值功率的能量输出也得以用于激光点火、激光爆破等特殊领域。本论文主要基于对高峰值功率固体激光器光纤耦合技术的研究,搭建了一套输出激光光斑大小在微米级、输出功率密度在GW/cm2光纤传输激光系统。该系统的搭建主要是为了提升现有的激光驱动飞片能力,突破小直径飞片发射的技术瓶颈。本论文的研究中,取得的主要成果有:(1)设计了激光与光纤耦合和激光由光纤输出结构,确定了透镜尺寸、焦距等相关参数。对传输光纤结构进行了深入研究和选型,并对光纤端面进行了处理。(2)对光路结构进行了光学仿真,并对输出效果进行了模拟,得到了与理论计算吻合的光斑大小。对光路对准中可能产生的对准误差与耦合效率的关系进行了分析,并给出了仿真结果。(3)搭建了光纤传输光路系统,实现了系统激光输出单脉冲能量为10~20mJ,光斑大小600?m的光束输出。
[Abstract]:Since the laser and fiber laser and fiber coupling technology available, has received great attention and study. The development of the fiber coupling technology of semiconductor laser, which transmits laser beam is used in industry, using optical fiber communication, medical and military fields. At present, the laser processing by laser solid laser system also, the welding has become possible because of its narrow pulse solid laser with high peak power and energy output can also be used for laser ignition, laser blasting and other special areas. Study on high peak power solid laser fiber coupling technique in this paper is based on a set of output laser spot size at the micron level, the output power density at GW/cm2 optical fiber laser system. The structure of the system is mainly to improve the ability of laser driven flyer, through small diameter flyer launch The technical bottleneck. The research of this thesis, the main achievements are as follows: (1) the design of laser and optical fiber coupling and laser output by the optical fiber structure, determine the size of the lens focal length, and other parameters. For the transmission fiber structure in-depth research and selection, and the fiber end in the treatment (2). The optical structure of optical simulation, and the output was simulated, the spot size is consistent with the theoretical calculation. The light path possible in the alignment of the alignment errors and the coupling efficiency is analyzed, and the simulation results are given. (3) build a fiber optical optical system, implementation the system of laser output pulse energy is 10~20mJ, the spot size of 600? M beam output.

【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN248.1

【相似文献】