Tunable optical frequency comb generation system based on single-chip integrated microcavity laser

The invention discloses a tunable optical frequency comb generation system based on a single-chip integrated microcavity laser. The system is that a main laser and a secondary laser are integrated to the same functional module, wherein the main laser is used for providing a tunable injected light signal to the laser; a tunable light filter is used for performing tunable filtering for light signals inputted by the main laser and the secondary laser; an optical fiber amplifier is used for amplifying the light signals so as to achieve the power for a high-nonlinearity optical fiber to work; an opto-isolator is used for ensuring the single-way output of the light outputted by the optical fiber amplifier to the high-nonlinearity optical fiber; the high-non-linearity optical fiber is used for providing a nonlinearity medium and expanding cascade four-wave mixing so as to obtain the optical frequency comb with equal frequency intervals and uniform power distribution. According to the system, the spectrum spreading effect of the high-nonlinearity optical fiber is utilized to generate the optical frequency comb with uniform mode intervals; the opposite position of the inputted wavelength is changed to achieve continuous tuning of frequency comb intervals; the frequency comb intervals cover wave bands at ultrahigh frequency centimeter wave of 3 to 30GHz and extremely high frequency millimeter wave of 30 to 300GHz.