中文摘要：

为克服基于梯度算法偏振控制器的局部收敛和附加复位问题，提出了基于遗传算法的偏振态控制算法．将该算法应用于波片快轴0°、45°交替定位的四波片延迟量控制型偏振控制器中，研究了经该算法反馈控制后偏振控制器的输出偏振态光强变化和波片相移特性．仿真结果表明，基于该算法的偏振控制器能将任意输入偏振态转换为固定的线输出偏振态，输出偏振态的光强波动小于2％．该算法能控制波片相移在限制范围内作小步长变化，可消除波片偏压突变引起附加偏振态波动．

英文摘要：

To overcome the local convergence and the additional reset of gradient algorithms based polarization controller, a genetic algorithm based polarization control algorithm was proposed. The algorithm was applied in a 4-plate retardation control type polarization controller with waveplates oriented alternatively at 0° and 45°, and the light intensity changes of output polarization state and waveplates phase shifts controlling the algorithm were investigated. The simulation results show that the polarization controller based on the algorithm can convert the random input polarization state into a fixed linear output polarization state, and that the intensity fluctuation of the output polarization state is less than 2 %. The algorithm can allow the phase shift of the plates to vary with a small step within a given limited range, and can avoid the additional fluctuation of polarization state caused by the voltage surge applied to waveplates.