Fig. 1. Setup and structure of thin film lithium niobate waveguide in simulation

Fig. 2. Evolution of spectrum in lithium niobate waveguide，dispersion parameters of waveguide and output spectrum of waveguide

Fig. 3. Temporal waveform and spectrum based on electro-optic modulation

Fig. 4. The dispersion parameters of the waveguide and the spectrum of the waveguide output at different pulse energies in the simulation

Fig. 5. Spectral evolution in the LN waveguide under different input pulse energies，and different modulation depths

Fig. 6. The relationship of pulse width and input energy when supercontinuum spectrum of octave band generated

Fig. 7. Spectral evolution in the LN waveguide under different modulation frequencies