Active resonant cavity based self-similarity ultrashort pulse amplification system and working method therefor

The invention discloses an active resonant cavity based self-similarity ultrashort pulse amplification system and a working method therefor. The self-similarity ultrashort pulse amplification system is characterized by comprising an optical frequency comb-shaped generator, a pre-chirping management apparatus, an active optical resonant cavity and a dispersion compensation apparatus that are connected in sequence, wherein the active optical resonant cavity is also connected with an electronic control circuit and a pump laser. The active resonant cavity based self-similarity ultrashort pulse amplification system has the advantages that an outer cavity enhancement technique is adopted, so that the self-similarity amplification for the ultrashort pulse is realized by using solid gain mediums, and the gain narrowing is overcome; the nonlinear widening of spectrum in the amplification process is realized, the pulse contract ratio is improved, and the problems of unstable modes, self-focusing and the like existing in the high-power amplification process of an optical fiber amplifier are effectively restrained; and the self-similarity ultrashort pulse amplification system is used as a reliable scientific research tool for researching high-field laser physics and non-linear optics.