Fig. 1. Principle diagram of amplitude-split polarization measurement

Fig. 2. Structure diagram of polarization control

Fig. 3. Poincare sphere to represent of action of wave plate on polarized light

Fig. 4. Optical path diagram of polarization control system

Fig. 5. Control flow chart

Fig. 6. Control optimization flow chart. (a) Process diagram of preset control optimization; (b) process diagram of restore control optimization

Fig. 7. Azimuth measurement result and error. (a) Azimuth measurement result; (b) azimuth measurement error

Fig. 8. Ellipticity measurement result and error. (a) Ellipticity measurement result; (b) ellipticity measurement error

Fig. 9. 90° line polarized light control error

Fig. 10. Arbitrary polarized light reduction error. (a) Azimuth measurement error of initial state reduction; (b) ellipticity measurement error of initial state reduction