Fig. 1. OFC generation structure based on coupled RF signal and single MZM

Fig. 2. Time domain waveforms of coupled RF signals. (a) Even coupling; (b) odd coupling

Fig. 3. Spectra of OFC under different lower arm modulation voltages. (a) 2 V; (b) 6 V; (c) 8 V; (d) 10 V

Fig. 4. Spectra of OFC under different modulation voltages of MZM upper arm. (a) 2 V; (b) 4 V; (c) 6 V; (d) 8 V

Fig. 5. Spectrum of OFC with upper arm modulation voltage of 6.88 V

Fig. 6. Spectra of OFC under different comb line intervals. (a) 10 GHz; (b) 13 GHz; (c) 20 GHz; (d) 30 GHz

Fig. 7. Spectra of coupled RF signal and corresponding OFC.(a)(b) sin(w_ct); (c)(d) sin²(w_ct); (e)(f) sin³(w_ct); (g)(h) sin⁴(w_ct)