In the paper

the control algorithms for 45°-0°-45° phase retardation polarization controllers is discussed

the errors introduced to phase retardation is analyzed and the correlations between the azimuth angle error and ellipticity angle error of the output polarization state and the latency error are observed by simulation.The results show that the latency error has less effect on ellipticity angle error than that on azimuth angle error.Effects of the latency error that are caused by the incident optical wavelength error on the output polarization state precision is also analyzed.Simulation results show that the 45°-0°-45° phase retardation polarization controller is wavelength sensitive.