Fig. 1. Structure and composition of SPCS

Fig. 2. Light reflectance and transmittance of flat glass

Fig. 3. Relationship between transmittance and incident Angle of quartz at 633nm witht different value of PS%

Fig. 4. Relationship between the incident Angle of perpendicular linearly polarized light and the transmittance of quartz

Fig. 5. Different transmittance interval and corresponding Angle adjustment interval

Fig. 6. Schematic diagram of experimental device

Fig. 7. Beam power stability fluctuation between free-running and after-modulation

Fig. 8. Allan variance diagram between free-running and after-modulation

Fig. 9. Time-domain plot of output voltage of SPD2

Fig. 10. Allan variance diagram of output voltage of SPD2