Optimization of passively mode-locked quasi-continuously diode-pumped Nd:GdVO_4 laser in bounce geometry

摘要

In this paper the operation of pulsed diode-pumped Nd:GdVO_4 laser oscillator in bounce geometry passively mode-locked using semiconductor saturable absorber mirror (SAM), generating microjoule level picosecond pulses at wavelength of 1063 nm, is reported. Optimization of the output coupling for generation either Q-switched mode locked pulse trains or cavity dumped single pulses with maximum energy was performed, which resulted in extraction of single pulses as short as 10 ps and energy of 20 μJ. In comparison with the previous results obtained with this Nd:GdVO_4 oscillator and saturable absorber in transmission mode, the achieved pulse duration is five times shorter. Using different absorbers and parameters of single pulse extraction enables generation of the pulses with duration up to 100 ps with the energy in the range from 10 to 20 μJ.