We demonstrate a compact and efficient diode-end-pumped TEM00 laser with ou
tput power of 25.2 W for 52 W of incident pump power by use of a single YVO
4 crystal with a Nd concentration of 0.3 at.%. In Q-switched operation 21-W
of average power at a pulse repetition rate of 100 kHz and similar to 1.1-
mJ pulse energy at a pulse repetition rate of 10 kHz were produced, At 10 k
Hz, the pulse width is around 10 ns and the peak power is higher than 100 k
W.