Tunable ultraviolet light generation method based on self-similarity amplifier

The invention discloses a tunable ultraviolet light generation method based on a self-similarity amplifier. According to the tunable ultraviolet light generation method, the optical pulse from an ultra-short pulse optical fiber laser is subjected to high-power self-similarity amplification through a pre-chirping management module for realizing self-similarity evaluation of the optical pulse; then the optical pulse is compressed by grating pairs to obtain optical pulse output with high power, wide spectrum and narrow pulse width; and high-power tunable ultraviolet spectrum is obtained through a tunable quadruplicated frequency system. The tunable ultraviolet light generation method has the advantages that the near infrared light obtained by a pre-chirping management technology and a self-similarity amplifying system is quite narrow in pulse width and high in power, so that frequency multiplication efficiency is high, and high-power ultraviolet laser can be obtained; and in addition, the infrared laser generated based on self-similarity amplification has the broadband spectrum characteristic, and tunable high-power laser output within an ultraviolet band range can be realized.