Light-assisted ultra-octave ultra-wideband synthetic aperture radar system

The invention relates to a light-assisted ultra-octave ultra-wideband synthetic aperture radar system. Belongs to the technical field of ultra-wideband synthetic aperture radars and solves the problem of limitation of instantaneous bandwidth of a traditional electronic system. The system comprises a digital system, an intermediate frequency system and a radio frequency system, and is characterized by further comprising a photon radio frequency front end, the photon radio frequency front end is connected between the intermediate frequency system and the radio frequency system; a photon-assisted frequency doubling technology is adopted, an input intermediate frequency LFM signal is subjected to frequency doubling and then is mixed with a local oscillator signal, and an ultra-octave ultra-wideband signal is generated; multiplying the received echo signal reflected by the target scene by a reference signal by adopting a photon-assisted de-chirp technology to generate a de-chirp target echo signal; the reference s