Various lengths of Yb:Er:YVO4 were end pumped by a quasi-continuous wave 967 nm diode laser. The best slope
efficiency with respect to absorbed pump power for gain switched operation was 8 % for a 5 mm long crystal.
Co:MgAl<sub>2</sub>O<sub>4</sub> saturable absorbers of 98 % and 93 % initial transmission were used to passively Q-switch the cavity. For
the 98 % initial transmission absorber, average pulses energies of 44 µJ were measured. The average pulse width and
repetition rate were ~256 ns and 36 kHz, respectively. For the 93% initial transmission absorber, a single output pulse of
37 µJ energy and 22 ns duration per pump pulse was measured when the crystal was pumped for a pumping duration of
The first demonstration of a pulsed Nd:YCOB laser at 1060 nm is reported, with results for both gain switching and Qswitching
presented. Active Q-switching is achieved using the spinning disc technique pulses of 50 ns duration with
pulse energies up to 0.6 mJ are obtained. Optimisation is performed for both pulse energy and slope efficiency of the
laser. A Q-switched slope efficiency of 56% is achieved.
We report the active Q-switching of a Yb:Er:YVO4 laser for the first time. A Yb:Er:YVO4 crystal was end pumped by a
quasi-continuous wave laser diode emitting at 967 nm with a peak power of up to 48 W. The laser cavity was actively Qswitched
using the spinning disc technique. At a repetition rate of 19.2 kHz, the Q-switched slope efficiency and
threshold were 4 % and 62 mJ respectively. In comparison, the same system had a slope efficiency of 5% and a threshold
of 75 mJ without mechanical Q-switching. Single pulse of energy up to 90 μJ and duration as short as 110 ns were
obtained for the single output pulse per pump pulse operation.