Terahertz dual-comb spectrum stabilization system

A terahertz dual-comb spectrum stabilization system, comprising:

• an optical loop, used for coupling a first optical frequency comb signal to a second optical frequency comb signal;
• a frequency mixer, used for performing frequency mixing on the coupled first optical frequency comb signal and second optical frequency comb signal to generate a dual-comb signal;
• wherein a local oscillator signal end of the frequency mixer is connected to a multi-chain frequency multiplication chain, the multi-chain frequency multiplication chain is used for performing frequency multiplication processing on a radio frequency signal, then a local oscillator frequency in terahertz frequency range is generated by means of frequency multiplication using the frequency mixer, the local oscillator frequency in terahertz frequency range is respectively mixed with the first optical frequency comb signal and the second optical frequency comb signal in the frequency mixer, and two down-converted optical frequency comb signals are generated in microwave frequency range;
• a first signal extraction device, used for extracting one comb tooth from one of the two down-converted optical frequency comb signals;
• a first phase-locking device, used for locking the phase of the comb tooth extracted by the first signal extraction device;
• a second signal extraction device, used for extracting one comb tooth from one of the two down-converted optical frequency comb signals;
• a second phase-locking device, used for locking the phase of the comb tooth extracted by the second signal extraction device.