Double-optical-comb femtosecond disc laser

The invention discloses a double-optical comb disc laser, which belongs to the technical field of solid laser, and comprises a pumping source, a disc laser crystal, a pumping module, a dispersion compensation unit, a first resonant cavity and a second resonant cavity, wherein pumping laser output by the pumping source is focused on the disc laser crystal through the pumping light path; laser generated by the disc laser crystal oscillates back and forth in a back-and-forth light path provided by the first resonant cavity and the second resonant cavity; and the first resonant cavity and the second resonant cavity share one polarization splitting prism as a Kerr medium to realize mode-locked laser pulse. The problem that an additional stabilizing device is needed when two independent mode-locked lasers are used in a traditional double-optical-comb system is solved. According to the invention, the two resonant cavities are integrated into one laser, so that the influence of external noise of the resonant cavities