Saturable-absorber mode locking and <i>Q</i> switching of neodymium-doped lasers at 1.06 μm with a PbS-doped glass were demonstrated. <i>Q</i>-switched pulses of 0.3 μJ in energy and 15 ns in duration from a cw diode-pumped Nd<sup>3+</sup>:KGd(WO<sub>4</sub>)<sub>2</sub> laser and ultrashort pulses of 18 μJ in energy and 70 ps in duration from a Nd<sup>3+</sup>:Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> laser were obtained. The saturation intensity of the PbS-doped glass (with an average semiconductor crystallite radius of 1.7 nm) was estimated to be 2.3 MW/cm<sup>2</sup> at 1.06 μm. The bleaching relaxation time was measured to be 23 ps.
© 2002 Optical Society of America
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.4050) Lasers and laser optics : Mode-locked lasers
(160.2750) Materials : Glass and other amorphous materials
(160.6000) Materials : Semiconductor materials
A. M. Malyarevich, V. G. Savitski, P. V. Prokoshin, N. N. Posnov, K. V. Yumashev, E. Raaben, and A. A. Zhilin, "Glass doped with PbS quantum dots as a saturable absorber for 1-μm neodymium lasers," J. Opt. Soc. Am. B 19, 28-32 (2002)