Repositori URV

Identificador: imarina:3823834

Handle: https://hdl.handle.net/20.500.11797/imarina3823834

Autores:
Kifle, EsromMateos, XavierLoiko, PavelChoi, Sun YungBae, Ji EunRotermund, FabianAguilo, MagdalenaDiaz, FrancescGriebner, UwePetrov, Valentin

Resumen:
© 2018 Optical Society of America. A Tm 3+ 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:KY 1-x-y Gd x Lu y (WO 4 ) 2 active layer grown on an undoped (010)-oriented KY(WO 4 ) 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.