  Pulsed visible lasers either by Q-switching or mode locking have been
attracting intense attentions both in solid-state laser and fiber laser. Here,
we report on the simultaneous manipulation of reconfigurable sub-pulse
sequences and customizable high-order vortex beams in an actively Q-switched
visible laser. On the one hand, pulse sequences with up to 4 sub-pulses could
be generated and fully controlled by means of an acoustic-optic modulator
driven by an arbitrary waveform generator. Both pulse number and pulse
intensity can be manipulated through the programmable step-signal, which is
also theoretically simulated through the rate equations. On the other hand,
assisted by the off-axis pumping technique and the astigmatic mode conversion,
the laser cavity could emit high-quality vortex beams carrying
Laguerre-Gaussian modes up to 30th order. To the best of our knowledge, this is
the most flexible active manipulations not only on the intensity distribution
of the transverse modes but also on the temporal distribution of the pulse
sequences in a visible laser. The versatile manipulating techniques in this
work could be immediately implemented into all other solid-state lasers to
obtain sub-pulse vortex beams, which may provide enhanced functionality and
flexibility for a large range of laser systems.
