Tunable ultraviolet light generation apparatus based on self-similarity amplifier

The invention discloses a tunable ultraviolet light generation apparatus based on a self-similarity amplifier. The tunable ultraviolet light generation apparatus is characterized by comprising an ultra-short pulse optical fiber laser, a cascading high-power amplifier and a quadruplicated frequency system connected in sequences, wherein the cascading high-power amplifier comprises a first-level amplifier, a second-level amplifier, a pre-chirping management module, a third-level amplifier and a chirping compensation module. The tunable ultraviolet light generation apparatus 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.