Passive Q-switched mode locking of a diode-pumped Tm:SSO laser near 2 μm

Journal Article

With a fiber-coupled 790 nm laser diode array as the pump source and a 4 at.% Tm:Sc2SiO5 (Tm:SSO) crystal, laser action near 2 μm wavelength was successfully obtained with a compact four-mirror fold cavity. Using broadband carbon nanotube as the saturable absorber, a passively Q-switched mode-locked (QML) Tm:SSO laser is realized for the first time. 100% modulation depth of mode locking has been achieved. The duration of the mode-locked pulse is estimated to be about sub-100 ps with 92.6 MHz repetition rate within a Q-switched pulse envelope. The spectrum of the QML laser is centered at 1967.4 nm with a broad spectral region of ∼23 nm. A maximum average output power of 195 mW and Q-switched pulse energy of 4.7 μJ is obtained. The dependence of the operational parameters on pump power was also investigated experimentally. © 2013 Astro Ltd.

Full Text

Duke Authors

Cited Authors

  • Liu, J; Li, YQ; Zheng, LH; Su, LB; Xu, J; Wang, YG

Published Date

  • 2013

Published In

Volume / Issue

  • 10 / 10

International Standard Serial Number (ISSN)

  • 1612-2011

Digital Object Identifier (DOI)

  • 10.1088/1612-2011/10/10/105812