Laser diode end-pumped V:YAG passively Q-switched UV lasers at 335 nm

In this paper, we present the using of a c-cut N&GdVO4 as the laser media, V:YAG as a saturable absorber and LBO as nonlinear crystal to obtain the passively Q-switched intra-cavity frequency doubled red laser at 670 nm and forth harmonic generation at 335 nm UV laser. Using dual end pump configurations at total pump power of 30 W at 808 urn, the repetition ratios of 153 kHz. the pulse width of 22 us, average output power of 82 mW. peak power of 24.4 W and single pulse energy of 0.54 mu J pulsed 335 nm UV laser are obtained, the corresponding optical to optical conversion efficiency is about 0.273%. [GRAPHICS] The pulse shape of single pulse at 335 nm(C) 2009 by Astro Ltd. Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA