Fig. 1. Principle diagram of system and spectra of optical frequency comb. （a）Principle diagram;（b1）input and （b2） output carrier spectra of MZM

Fig. 2. Bessel function curves under different modulation coefficients

Fig. 3. Standard deviations between the sidebands of different orders under different modulation coefficients

Fig. 4. Bessel function curve of n-order sideband

Fig. 5. Output optical frequency comb spectrum of modulator

Fig. 6. Bit error rate curves demodulated under different order sidebands

Fig. 7. Eye diagrams of different order components of continuous wave and eye diagrams obtained by demodulation at receiving terminal after transmission through optical fiber. (a) Positive third-order component of CW1; (b) negative third-order component of CW2; (c) synthetic sideband component; (d) positive third-order component of CW1 after transmission through optical fiber; (e) negative third-order component of CW2 after transmission through optical fiber; (f) synthetic sideband component after transmission through optical fiber

Fig. 8. Relationship between modulation voltage and flatness

Table 1. Bessel functional values corresponding to 0^th?4^th order sidebands under different modulation coefficients