Glass doped with PbS quantum dots is presented as a saturable absorber for passive Q-switching of diode-pumped
Tm:KYW laser. Output pulses with energy of 43 μJ at the repetition rate of 2.5 kHz were obtained. The slope efficiency
with respect to the absorbed pump power was ~20%. Being compared in the same laser, PbS-doped glass saturable
absorber outperforms Cr:ZnSe one in output power, pulse energy and slope efficiency.
Saturable absorbers on the base of lead sulfide QDs for lasers emitting at 1, 1.3, 1.5, 2.1 microns are introduced and characterized. It is demonstrated that these SAs can be used both for mode-locking and Q-switching of near IR lasers.
PbS-quantum dot-doped glasses have been demonstrated as saturable absorber Q-switches for 2-pm holmium lasers. Q-switched pulses of 50 ns in duration, 2.4 mJ in energy from a Cr,Tm,Ho:Y3Sc2A13012 laser at 2092 nm and Q-switched pulses with 70 ns in duration, 4.5 mJ in energy from a Cr,Tm,Ho:Y3A15012 laser at 2097 nm are obtained.
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