Fig. 1. Principle of asynchronous sampling based on dual-comb laser pulses

Fig. 2. Envelope power detector circuit of dual-comb beat frequency signal

Fig. 3. Experimental setup for beat frequency envelope extraction based on polarization-multiplexing dual-comb

Fig. 4. Output characteristics of polarization-multiplexing dual-comb laser

Fig. 5. Beat frequency signal diagram of asynchronous sampling

Fig. 6. Comparison of envelope detection results