Fig. 1. Frequency shift of the Kerr effect, with different colors representing various input pulse and corresponding frequency shift results

Fig. 2. Relationship between Kerr effect frequency shift and pulse duration. (a), (b), (c) and (d) The corresponding frequency shift results when Ri = 1/3, 3, 1/10 and 10 respectively

Fig. 3. Relationship between pulse waveform and transient frequency under Kerr effect. (a), (b), (c) and (d) Correspond to Ri = 1/3 , 3, 1/10, 10, and their corresponding transient frequencies

Fig. 4. Frequency shifting based on molecular alignment effect. (a) Pulse waveform of Serrodyne frequency shifting; (b) Corresponding molecular alignment frequency shifting results

Fig. 5. Relationship between molecular alignment frequency shift and pulse duration. (a), (b), (c) and (d) Correspond results to Ri = 1/3, 3, 1/10, 10

Fig. 6. Relationship between pulse waveform and transient frequency under molecular alignment. (a), (b),(c), (d) Correspond to Ri = 1/3, 3, 1/10, 10, and their corresponding transient frequencies