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Diode-end-pumped, electro-optically Q-switched Nd:YVO4 slab laser and its second-harmonic generation
Hengli Zhang1, Peng Shi, Daijun Li
1Fraunhofer Institut für Lasertechnik, Steinbachstrasse 15, 52074 Aachen, Germany. hzhang@ilt.fhg.de
Abstract:
We describe the operation of a near-diffraction-limited, 1,064-nm electro-optically Q-switched Nd:YVO4 slab laser that is end pumped by laser-diode stacks and its efficient second-harmonic generation by using a lithium triborate (LBO) crystal. The energy per pulse of 3.6 and 0.8 mJ and pulse widths of 5 and 13.5 ns were obtained at repetition of 5 and 40 kHz, respectively. With a LBO crystal, a maximum output power of 15.6 W at 532 nm was obtained at the repetition rate of 40 kHz, the corresponding conversion efficiency was 60%, and the pulse width was 11.3 ns. At 10 kHz, the pulse energy of 532 nm was 1.2 mJ, and the pulse width was 5 ns.