Closed-loop stable control of two deformable mirrors for compensation of amplitude and phase fluctuations
Closed-loop stable control of two deformable mirrors for compensation of amplitude and phase fluctuations
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DOI：
10.1364/josaa.19.000926
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发表时间：
2002-05-01
影响因子：
1.9
通讯作者：
Barchers, JD
中科院分区：
文献类型：
--
作者：
Barchers, JD
描述了一种对两个变形镜进行闭环稳定控制以补偿幅度和相位起伏的方法。描述了一种通用的实现，以及将点衍射干涉仪的概念与两个变形镜系统相结合的实现。描述了闭环控制算法与以前开发的开环迭代算法的关系。仿真结果表明，该系统性能稳定，性能优于单一变形镜系统。用波动光学模拟的方法研究了有限的伺服带宽对两个变形镜控制的影响，发现两个变形镜系统的带宽必须至少是Greenwood频率的两倍，才能通过补偿幅度波动来提高系统的性能。(C)2002年美国光学学会。
A method for closed-loop stable control of two deformable mirrors for compensation of both amplitude and phase fluctuations is described. A generic implementation is described as well as an implementation that integrates the concept behind a point diffraction interferometer with a two-deformable-mirror system. The relationship of the closed-loop control algorithm to previously developed open-loop iterative algorithms is described. Simulation results are presented that indicate that the system is stable and provides superior performance over that of a single-deformable-mirror system. The impact of finite servo bandwidth on control of two deformable mirrors is evaluated by means of wave optical simulation, and it is found that to achieve a performance improvement attributable to compensation of amplitude fluctuations, the bandwidth of the two-deformable-mirror system must be at least twice the Greenwood frequency. (C) 2002 Optical Society of America.