Fig. 1. Schematic of the ultraviolet tunable Ti：Sapphire laser

Fig. 2. System of ultraviolet tunable Ti：Sapphire laser

Fig. 3. TEM₀₀ model 527 nm pumped laser optical path

Fig. 4. Beam quality test results of 527 nm pump laser

Fig. 5. Laser power of fundamental frequency and Second-Harnimonic Generation （SHG）frequency

Fig. 6. Laser output power in the deep ultraviolet band

Fig. 7. Conversion efficiency diagram of second-harnimonic generation and fourth-harnimonic generation

Fig. 8. Deep ultraviolet laser stability test