大功率LD阵列光束整形技术研究  

Study on the Beam-shaping of high-power LD Bar Arrays

作　　者：孔媛媛[1] 曾晓东[1] 安毓英[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《光电子．激光》2006年第4期406-409,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60277004)

摘　　要：提出一种新的大功率LD阵列的光束整形方案,首先使预准直的光束在快轴方向分层,然后使其在慢轴方向重新排列,最终在输出端得到高亮度的矩形光斑。详细讨论了方案的工作原理和设计方法,利用几何光学方法计算了输出光斑的尺寸,并用光参数积(BPP)对整形后光束质量作了评估。数值计算结果表明,该整形方法明显改善了大功率LD阵列的光束质量。A new beam-shaping method for high-power LD bar is presented. In this method, firstly beams are separated into several layers along fast axis direction, and then they are rearranged along slow axis direction,finally a high brightness rectangular beam is received at the output. The principles and shaping mechanism of the shaping element are discussed in detail. The spot size of the output beam is calculated by using the geometrical optics method. The output beam quality is evaluated. Numerical results show that the beam quality has been improved significantly.

关 键 词：大功率LD阵列 光束整形 光束质量 光束参数积(BPP) 

分 类 号：TN248.4[电子电信—物理电子学]