Fig. 1. Modulation and demodulation procedures of DA-RoF. (a) Modulation; (b) demodulation

Fig. 2. DA-RoF symbols. (a) Schematic diagram; (b) electrical waveform of DA-RoF signal

Fig. 3. DSP module

Fig. 4. Experiment of single-channel transmission. (a) Experimental setups; (b) optical spectra

Fig. 5. Optimization results of DA-RoF modulation factors under BTB. (a) RSNR versus c1; (b) RSNR versus a and c2; (c) RSNR versus a and ROP for 50 GBaud DA-RoF signal

Fig. 6. Experimental results for single-channel transmission. (a) RSNR versus MF after BTB; (b) RSNR versus MF after 10 km SMF transmission; (c) RSNR versus symbol rate; (d) electrical frequency spectra of 40 GBaud signal before transmission over 10 km SMF; (e) electrical frequency spectra of 40 GBaud signal after transmission over 10 km SMF

Fig. 7. Experimental setups for multi-channel transmission

Fig. 8. Experimental results after 10 km 7-core MCF transmission. (a) SNR; (b) EVM; (c) constellations of core#1; (d) constellations of core#3; (e) constellations of core#5; (f) constellations of core#7

Fig. 9. Experimental platform

Fig. 10. Experimental results after 1 km 7-core MCF transmission. (a) RSNR and EVM of 50 GBaud signals in 7 cores; (b) RSNR and EVM of 60 GBaud signals in 7 cores