Passive mode locking of 209 μm Cr,Tm,Ho:Y_3Sc_2Al_3O_12 laser using PbS quantum-dot-doped glass

Abstract

Passive Q-switched mode locking of a 2.09 microm flashlamp-pumped Cr(3+),Tm(3+),Ho(3+):Y(3)Sc(2)Al(3)O(12) laser by use of a phosphate glass doped with PbS quantum dots of 5 nm in radius was demonstrated. Mode-locked pulses of 290 ps in duration and up to 0.5 mJ in energy were registered.

Lead Chalcogenide Quantum Dot‐Doped Glasses for Photonic Devices

“…Therefore, glasses containing lead chalcogenide QDs have been used for saturable absorbers for the generation of short light pulses with high energy densities. Under the continuous‐wave laser or flash‐lamp pumping, laser pulses with widths of picoseconds to several hundred nanoseconds were generated from several lasers operating from 1.06 to 2.1 μm …”

Passively Q-switched mode-locking of Tm:YAP laser based on Cr:ZnS saturable absorber

“…However, the low damage threshold limited the output power scale and operation stability of graphene-based pulsed lasers at 2 μm. Besides, the QMLs of flash-lamp-pumped Cr 3 ; Tm 3 ; Ho 3 :Y 3 Sc 2 Al 3 O 12 and diode-pumped Tm:KYW lasers were achieved using PbS quantum-dot-doped glass as the SA [14,15]. Compared with the above-mentioned SAs, the Cr:ZnS absorber has a relatively higher absorption cross section and lower saturable intensity of ∼14 kW∕cm 2 [16], which are favorable for the onset of Q-switched mode-locking.…”

Broad spectral pulse operation of 2 μm Tm:YAP laser based on reflection-type carbon nanotube absorber

“…Owing to the strong absorption by liquid water, the 2 µm laser is an ideal light source for biomedical applications. Up to now, picosecond and femotosecond pulses around 2 µm have been successfully demonstrated in Tm doped or Tm, Ho co doped fiber and bulk lasers based on additive pulse mode locking [3][4][5][6][7], saturable absorption mode locking in strained InGaAs multiple quantum wells (MQWs) [8] and Sb based semicon ductor saturable absorber mirrors (SESAMs) [9] as well as single wall carbon nanotube [10,11] and PbS quantum dots doped glass [12]. But there is no reported for using of reflection type single walled car bon nanotube absorber as a saturable absorber in the Q switched mode locking (QML) of a diode pumped Tm:YAP operating at 2 µm.…”