The 1 micron family Q-switched pulsed fiber laser produces up to 70 kW power output pulses with 20 to 100 ns variable pulse width. Q-switching is an optical technique used to produce light pulses with extremely high peak power. The technique is mainly applied for the generation of nanosecond pulses of high energy and peak power. Typical applications of such lasers are material processing (e.g. cutting, drilling, and laser marking), pumping non linear frequency conversion devices and LIDAR applications.