基于自适应光学技术控制光束近场场强
Control of near-field intensity of laser beam based on adaptive optics
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摘要: 在双变形镜自适应光学系统中，需要主激光出射时与信标光的振幅分布一致、相位共轭，当主激光到达目标时光波的分布与目标上发射的信标光光波分布相同，主激光的振幅和相位都得到校正。根据双变形镜自适应光学技术的概念，提出一种基于自适应光学技术控制光束近场场强的方法，从而实验验证双变形镜技术的可行性。该方法利用哈特曼传感器探测到的波前信息，对变形镜进行控制，实现了对光束近场场强的控制。仿真结果表明该系统对光束近场强度能进行较好地校正，使校正前后光束振幅的残余均方差值从0.310 0降为0.052 2，同时实验也验证了这种方法的可行性。Abstract: In two-deformablemirror adaptive optics systems, the outing main laser compared to the beacon light should have the same amplitude distribution and conjugated phase, and when the main laser reaches the target with the same distribution as the beacon light from the target, the main laser’s amplitude and phase have been corrected. According to the two-deformable-mirror adaptive optics technology, this paper presents a method based on adaptive optics system to control the nearfield intensity of laser beam, and experimentally validates the feasibility of the two-deformable-mirror technology. This method uses the Hartmann-Shack(H-S) wave-front sensor to detect the wave-front information, which is utilized in the control of the deformable mirror to achieve near-field intensity control over
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