A near-diffraction-limited, stable, 18 mJ green source with a pulse width of 16.7 ns was generated at a 1 kHz repetition rate by frequency doubling of diode stacks end-pumped electro-optically Q-switched slab Nd:YAG oscillator-amplifier system. The pump to green optical conversion efficiency was 10.7%. At the output energy of 15 mJ at 532 nm, the M2 factors were 1.3 and 1.7 in the unstable and stable directions, respectively. The energy pulse stability was ∼0.8%.
© 2007 Optical Society of America
Lasers and Laser Optics
Original Manuscript: January 16, 2007
Revised Manuscript: May 1, 2007
Manuscript Accepted: May 25, 2007
Published: September 5, 2007
Hengli Zhang, Xiaomeng Liu, Daijun Li, Peng Shi, Alex Schell, Claus Rüdige Haas, and Keming Du, "Near-diffraction-limited green source by frequency doubling of a diode-stack pumped Q-switched Nd:YAG slab oscillator-amplifier system," Appl. Opt. 46, 6539-6542 (2007)