Fig. 1. Experimental setup for measuring the PDG and LPO in the SOA.

Fig. 2. PDG versus injected current of the SOA for inputs with 3 fixed powers (A curves: 0.65 mW, B curves: 0.85 mW, and C curves: 1.05 mW) and 3 fixed wavelengthes (blue circles: 1547 nm; green diamonds: 1557 nm; red stars: 1567 nm)

Fig. 3. Experimental (blue circles) and calculated (red pentagrams) LPOs of the SOA for different currents and 3 fixed input powers (A curves: 0.65 mW, B curves: 0.86 mW, and C curves: 1.05 mW) at 1567 nm.

Fig. 4. BER measurement scheme for DPolSK signals going through the SOA under different injected currents. PC, polarization controller; PDC, phase-drift compensator.

Fig. 5. BER measurement result with respect to injected current in the SOA.