Xiang Chen, Jianping Yao, "4 × 4 multiple-input multiple-output coherent microwave photonic link with optical independent sideband and optical orthogonal modulation (Invited Paper)," Chin. Opt. Lett. 15, 010008 (2017)
- Chinese Optics Letters
- Vol. 15, Issue 1, 010008 (2017)
Fig. 1. Schematic diagram of the proposed coherent MWP link based on OISB modulation and optical orthogonal modulation. PC: polarization controller.
Fig. 2. Principle of dual independent sideband generation with four real OFDM signals.
Fig. 3. Spectrum of the two independent sideband signals with four real OFDM signals.
Fig. 4. Schematic diagram to show the pilot-tone insertion.
Fig. 5. Spectrum of the two independent sideband signals with the pilot tone.
Fig. 6. Optical spectrum at the output of the DP-MZM for φ DC = − π / 2
Fig. 7. Optical spectrum at the output of the DP-MZM for φ DC = π / 2
Fig. 8. DSP for recovering microwave OFDM signal 1 and cancelling the phase noise and the unstable frequency difference.
Fig. 9. DSP for recovering microwave OFDM signal 2 and cancelling the phase noise and the unstable frequency difference.
Fig. 10. DSP for recovering microwave OFDM signal 3 and cancelling the phase noise and the unstable frequency difference.
Fig. 11. DSP for recovering microwave OFDM signal 4 and cancelling the phase noise and the unstable frequency difference.
Fig. 12. Spectrum of the signal at the output of the coherent receiver (I PD 1
Fig. 13. EVMs at different received optical power levels for the four OFDM signals, S1: Signal 1, S2: Signal 2, S3: Signal 3, S4: Signal 4.
Fig. 14. BERs at different received optical power levels for the four OFDM signals, S1: Signal 1, S2: Signal 2, S3: Signal 3, S4: Signal 4.
Fig. 15. Measured constellations for the recovered microwave OFDM signals (fiber length: 10 km, the received optical power: − 20.3 dBm
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