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就高功率激光二极管阵列端面抽运大口径放大器提出一种新的耦合方式:激光二极管阵列拟球面排布,其后紧接一个导管进行耦合传输.用三维光线追迹法对这种耦合方式的特性进行模拟分析.结果表明,该耦合方式能实现高的抽运耦合效率和高的能量沉积效率,在面积缩束比为30的条件下,该耦合方式的耦合效率和能量沉积效率最高可分别达96.7%,93.7%;当激光二极管面阵单元发光区域不小于导管输出端口径时,该耦合方式能实现抽运场均匀平顶分布;另外,采用该耦合方式,激光二极管阵列排列方式灵活,非对称排布时也可实现两维对称性好、均匀平顶分布的抽运耦合场输出.建立了激光二极管阵列端面耦合实验系统,实现了85.4%的耦合效率和均匀的抽运耦合场输出.
A new coupling method is proposed for pumping large aperture amplifiers at the end face of a high power laser diode array: the laser diode array is arranged in a spherically arranged manner, followed by a catheter for coupling and transmission.This method of coupling The simulation results show that the coupling method can achieve high pumping coupling efficiency and high energy deposition efficiency, and the coupling efficiency and energy deposition efficiency of the coupling method can be highest under the conditions of an area shrinkage ratio of 30 Which can reach 96.7% and 93.7% respectively. When the light emitting area of the laser diode array unit is not less than the diameter of the output port of the catheter, the coupling method can achieve a uniform flat-top distribution of the pumping field. In addition, the arrangement of the laser diode array is flexible, Asymmetric arrangement can also achieve a two-dimensional symmetry, uniform flat-topped pumping coupling field output.Laser diode array end-face coupling experiment system was established to achieve a coupling efficiency of 85.4% and a uniform pumping coupling field output .