Abstract
A passively Q-switched (PQS) Yb3+:LuYLaVO4 laser based on a GaAs saturable absorber is reported. The nonlinear saturable absorption property of GaAs has been studied, the saturation fluence, modulation depth and non-saturation loss were characterized to be 3.3 MW/cm2, 4.5% and 54.7%, respectively. In the PQS laser operation, the highest pulse repetition rate, shortest pulse width, largest single pulse energy and highest pulse peak power were measured to be 40 kHz, 4 ns, 16.7 μJ and 4.2 kW. The peak power achieved nearly three orders of magnitude improvement compared with the former Yb3+:LuYLaVO4 PQS lasers.
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