High-precision high-stability adjustable high-frequency signal generator

The invention provides a high-precision high-stability adjustable high-frequency signal generator. The generator comprises a distributed feedback laser and a beam splitting optical coupler which are connected in series, wherein the distributed feedback laser is used for generating a seed light source; the beam splitting optical coupler is used for splitting the light source into two light beams; two output ends of the beam splitting optical coupler are respectively connected with input ends of a first optical signal frequency domain frequency shifting structure and a second optical signal frequency domain frequency shifting structure which are respectively used for carrying out precise frequency shifting of input optical signals in opposite directions according to preset shifts in a frequency domain; an output end of the first optical signal frequency domain frequency shifting structure is connected with an input end of a beam combining optical coupler, which is used for combining thetwo light beams into one