Fig. 1. Schematic diagram of the experimental setup.

Fig. 2. Output pulse energy of the OPO at 444 nm as a function of the pump pulse energy.

Fig. 3. Pulse temporal profile of the 444 nm laser.

Fig. 4. Intensity distribution profile of 444 nm laser beam.

Fig. 5. M² factors measured for the 444 nm laser beam.

Fig. 6. Output laser spectrum of the OPO at 444 nm.

Fig. 7. Output pulse energy of SHG at 222 nm as a function of the fundamental pulse energy.

Fig. 8. Spectrum of the 222 nm laser.

Fig. 9. Pulse temporal profile of the 222 nm laser.

Fig. 10. Tunable output in UVC spectral range.