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Glass doped with PbS quantum dots as a saturable absorber for 1-mu m neodymium lasers

Malyarevich, A M and Savitski, Vasili and Prokoshin, P V and Posnov, N N and Yumashev, K V and Raaben, E and Zhilin, A A (2002) Glass doped with PbS quantum dots as a saturable absorber for 1-mu m neodymium lasers. Journal of the Optical Society of America B, 19 (1). pp. 28-32. ISSN 0740-3224

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Saturable-absorber mode locking and Q switching of neodymium-doped lasers at 1.06 mum with a PbS-doped glass were demonstrated. Q-switched pulses of 0.3 muJ in energy and 15 ns in duration from a cw diode-pumped Nd3+:KGd(WO4)(2) laser and ultrashort pulses of 18 muJ in energy and 70 ps in duration from a Nd3+:Y3Al5O12 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(2) at 1.06 mum. The bleaching relaxation time was measured to be 23 ps.