Abstract
The Nd:(LuxGd1−x)3Ga5O12 (Nd:LGGG) laser operating at 1329 nm in both the continuous wave (CW) and the passively Q-switched (PQS) regimes has been successfully demonstrated. With an absorbed pump power of 18.8 W, a maximum CW output power of 3.7 W was obtained, corresponding to an optical–optical conversion efficiency of 19.6% and a slope efficiency of 20.9%. The PQS laser performance was obtained using a V3+:YAG crystal as the saturable absorber. The maximum average output power, shortest pulse width, largest pulse energy and highest peak power were 0.75 W, 25.9 ns, 43.6 μJ and 1.7 kW, respectively. The results indicate that a Nd:LGGG crystal with a low Lu-doping level (0.66 at.%) could be a novel potential laser gain medium suitable for laser diode pumping and PQS operation at a wavelength of 1.3 μm.
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