使用格兰-泰勒棱镜偏振耦合的1kW大功率半导体激光器  

1kW High Power Diode Laser with Polarization Coupled by Gran-Tylor Prism

作　　者：丁鹏[1] 曹银花[1] 苏国强[1] 陈虹[1] 王智勇[1] 左铁钏[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《中国激光》2009年第2期290-293,共4页Chinese Journal of Lasers

基　　金：科技部国际合作项目(2002AADF3101);国家自然科学基金(60407009);北京市自然科学基金(4042007)资助项目

摘　　要：大功率量子阱半导体激光器输出为线偏振光,而格兰-泰勒棱镜具有双折射性质,能将两种偏振方向相互垂直的光区分开。如果将格兰-泰勒棱镜反方向使用,则能将两个偏振方向的光耦合输出。使用两个中心波长808 nm,输出功率600 W的半导体激光堆栈,一个堆栈的输出光经过1/2波片后偏振方向旋转90°,另一个堆栈偏振方向保持不变,经过格兰-泰勒棱镜做偏振耦合后合成一束。分别经过快慢轴准直、聚焦和慢轴消球差后输出,其中聚焦镜f=100 mm。在工作电流130 A时。电光转换效率约为43%。使用UFF100激光光束质量诊断仪测量,焦斑呈矩形分布,焦斑面积为0.547 mm×5.0 mm,快轴光参积Kf=26.1 mm·mrad,最大输出功率1 kW,激光器系统工作稳定。Output laser beam of high power quantum well diode laser is linearly polarized, and Gran-Tayor prism can distinguish two laser beams in vertical polarizing direction by its characteristic of birefringence. If the input beams are in the opposite direction of the Gran-Tayor prism, they will be coupled into one beam. The experiment takes two 600 W diode laser stacks with 808 nm centre wavelength. The polarizing direction of one beam is changed by a 1/2 wave plate, the other is unchanged, and they are polarization coupled by the Gran-Tylor prism. The laser beam propagates through fast-axis or slow-axis collimating lens, focusing lens （f =100 mm） and slow-axis spherical aberration correcting lens. When the working current is 130 A, the electro optic efficiency is about 43%. Measured with the UFF100 laser beam diagnostics meter, the focal spot is rectangular, the area is 0. 547 mm×5.0 mm, the fast-axis beam parameter product is 26.1 mm· mrad, and the highest output power is 1 kW. The laser system works stably.

关 键 词：激光器 大功率半导体激光器 偏振耦合 格兰-泰勒棱镜 光参积 

分 类 号：TN248.4[电子电信—物理电子学]