Performance of doubly Q-switched and mode-locked Nd: Lu_(0.33)Y_(0.37)Gd_(0.3)VO_4 and Nd:Lu_(0.5)Y_(0.5)VO_4 lasers with acousto-optic modulator and GaAs saturable absorber

摘要

By using Nd:YVO_4, Nd:Lu_(0.5)Y_(0.5)VO_4 and Nd:Lu_(0.33)Y_(0.37)Gd_(0.3)VO_4 crystals as laser media, the diodepumped singly passively Q-switched and mode-locked (QML) lasers with GaAs saturable absorber, and the doubly QML lasers with acousto-optic (AO) modulator as well as GaAs are presented. In comparison with the singly passively QML laser with GaAs, the doubly QML lasers can generate stable pulse train, shorter pulse width, greater pulse energy and higher peak power. The experimental results show that the Nd:Lu_(0.33)Y_(0.37)Gd_(0.3)VO_4 QML laser can generate shorter pulse width with higher peak power than the Nd: YVO_4 or Nd:Lu_(0.5)Y_(0.5)VO_4 QML laser.