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17 February 2010 CW laser operation of a highly-doped Tm:KLu(WO4)2/KLu(WO4)2 thin disk epitaxial laser
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Abstract
We demonstrate the first thin disk epitaxial Tm-laser based on the monoclinic KLu(WO4)2 with 15 at. % doping. The doped epitaxial layer serving as an active medium is only 80 μm thick. The large absorption enables efficient pumping with only a single double pass of the pump radiation from the diode-laser. For output coupling between 0.4% and 2.8 %, the slope efficiency in the continuous-wave regime is in the 7-11% range and the laser threshold is 1.5...2.5 W of absorbed pump power. The laser emission spectra are centered at ~1850, 1915 and 1940 nm for output couples of 2.8%, 1.6% and 0.4% transmission, respectively. In all cases the emission spectra are "structured", consisting of a number (typically 5...10) of narrow emission lines spread irregularly over 15...30 nm.
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Sergei Vatnik, Ivan Vedin, Maria Cinta Pujol, Xavier Mateos, Joan J. Carvajal, Magdalena Aguilo, Francesc Diaz, Uwe Griebner, and Valentin Petrov "CW laser operation of a highly-doped Tm:KLu(WO4)2/KLu(WO4)2 thin disk epitaxial laser", Proc. SPIE 7578, Solid State Lasers XIX: Technology and Devices, 75780E (17 February 2010); https://doi.org/10.1117/12.841154
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