Fig. 1. Schematic of the ultraviolet tunable Alexandrite laser

Fig. 2. (a) Reflectance & Transmittance curves of M2; (b) Reflectance & Transmittance curves of M3

Fig. 3. Waist radius at different positions in the laser resonator

Fig. 4. Lsaer spectra at 756 nm

Fig. 5. Output power of 378 nm laser varies with the injection pump power

Fig. 6. Laser spectra at 371, 378 and 385 nm

Fig. 7. Output power corresponding to different wavelengths

Fig. 8. Laser beam quality at 378 nm