激光无线能量传输远场大光斑测试技术

无线能量传输系统作为空间太阳能电站的一个关键部分，其性能直接决定了空间太阳能电站技术的可行性。特别对于激光无线能量传输系统，准确测量激光远场光斑分布是分析和评价激光无线能量传输系统性能的有效手段。针对太阳能发电卫星轨道高、激光传输距离远、接收激光光斑面积大，并且受大气影响，光斑抖动严重，光斑能量分布以及光斑形状测量困难的问题，文章提出了基于光能探测器阵列的大面积激光光斑测试方法，采用光斑分布式测量及能量分布重构方法，完成激光无线能量传输系统远场光斑的测试，具有分布式测量，可灵活布局的特点，通过反演算法能够实现光斑能量密度分布重构，接收激光功率积分求解，光束发散角计算等，功能多样，适应能力强，为激光无线能量传输系统载荷的参数修订，以及在轨飞行任务的评价提供有效依据。

The far-field large spot testing technology of laser wireless power transmission

Laser wireless energy transmission system is a key part of space solar power station, its performance directly determines the feasibility of space solar power station technology, and accurate measurement of laser far-field spot distribution is an effective means to analyze and evaluate the performance of laser wireless energy transmission system.Aiming at the problems of solar power satellites with high orbit, long laser transmission distance, large receiving laser spot area, serious spot jitter due to atmospheric influence, and difficulty in spot energy distribution and spot shape measurement,a large area laser spot testing method based on optical energy detector array was put forward in this paper, which adopts spot distributed measurement and energy distribution reconstruction method to complete the far-field spot test of laser wireless power transmission system, which has the characteristics of distributed measurement and flexible layout. This method can realize the reconstruction of spot energy density distribution, the integral solution of received laser power, the calculation of beam divergence angle and other functions through inversion algorithm, and has strong adaptability, which provides an effective basis for the parameter revision of laser wireless energy transmission system load and the evaluation of on-orbit mission.