PMID: 29475339DOI: 10.1364/oe.26.004961Feb 25, 2018Paper
Tm:KY1 -x-yGdxLuy(WO4 )2 planar waveguide laser passively Q-switched by single-walled carbon nanotubes
Optics Express
Esrom KifleValentin Petrov
Abstract
A Tm3+ monoclinic double tungstate planar waveguide laser is passively Q-switched (PQS) by a saturable absorber (SA) based on single-walled carbon nanotubes (SWCNTs) randomly oriented in a polymer film. The laser is based on a 18 µm-thick 5 at.% Tm:KY1-x-yGdxLuy(WO4)2 active layer grown on an undoped (010)-oriented KY(WO4)2 substrate by liquid phase epitaxy with determined propagation losses 0.7 ± 0.2 dB/cm. The PQS laser generated a maximum average output power of 45.6 mW at 1.8354 µm with a slope efficiency of 22.5%. Stable 83-ns-long laser pulses with an energy of 33 nJ were achieved at a repetition rate of 1.39 MHz. The use of SWCNTs as SA is promising for generation of sub-100 ns pulses in such waveguide lasers at ~2 µm.
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Citations
May 3, 2018·Optics Express·Benoît BoulangerTakunori Taira
May 6, 2019·Optics Express·Esrom KifleXavier Mateos
Jan 31, 2019·Optics Express·Jun Wan KimFabian Rotermund
Apr 2, 2019·Optics Letters·Esrom KifleXavier Mateos
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