Fig. 1. Core component of the PPC hardware: (a) configuration, (b) principle, and (c) the SOP evolution on the Poincaré sphere when each PPC unit works.

Fig. 2. Relationship between the rotation angle of the SOP and the control voltage for PPC unit 1.

Fig. 3. Flow chart of the SOL-PC scheme.

Fig. 4. Experimental setup for investigation of the SOL-PC scheme. D/A: digital to analog conversion, A/D: analog to digital conversion

Fig. 5. Evolution of the SOP on the Poincaré sphere when performing the SOL-PC.

Fig. 6. Experimental PMD suppression system. PA: polarization analyzer, DGD: differential group delay.

Fig. 7. Evolution of the SOP on the Poincaré sphere for 3 m PMF as the wavelength varies (a) before and (b) after PMD suppression.

Fig. 8. Measured optical spectrum by the fixed-analyzer technique (a) before and (b) after PMD suppression.