A genetic algorithm used in a 61-element adaptive optical system

作     者：Ping YANG Bing XU Wenhan JIANG Shanqiu CHEN 

作者机构：Institute of Optics and Electronics Chinese Academy of Sciences Graduate School of Chinese Academy of Sciences 

出 版 物：《Frontiers of Optoelectronics》 (光电子前沿(英文))

年 卷 期：2008年第1卷第Z2期

页      面：263-267页

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 070207[理学-光学] 07[理学] 081104[工学-模式识别与智能系统] 08[工学] 0835[工学-软件工程] 0803[工学-光学工程] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 0702[理学-物理学] 

主　　题：adaptive optics peak intensity genetic algorithm deformable mirror Zernike polynomial 

摘      要：To correct the phase aberrations in a wavefront, a wavefront sensorless adaptive optical(AO) system is set up. A real-number encoding Gaussian mutation genetic algorithm(GA) that is adopted to control a 61-element deformable mirror(DM) is presented. This GA uses the light intensity behind a pinhole on the focal plane as the objective function to optimize, and therefore to omit the procedure of measuring the phase aberrations in the laser wavefront by a wavefront sensor. Phase aberrations generated by the DM are brought to an ideal incident wavefront. Several correction simulations have been accomplished. The simulation results show that the genetic algorithm is capable of finding the optimum DM shape to correct the phase aberrations. After the phase aberrations of the wavefront have been corrected by GA, the peak light intensity on the focal plane can be improved at most by a factor of 30, and the encircled energy Strehl ratio can be increased ultimately to 0.96from 0.032. It is also found that the convergence and stability of the 61 voltages on the DM is quite well. The simulation results prove that the genetic algorithm can be used in AO systems effectively.