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17 June 2003 Continuous wave lasing of Yb3+ in a stoichiometric double tungstate
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Proceedings Volume 4968, Solid State Lasers XII; (2003)
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States
The growing interest on Yb-doped lasers has been underlined by creating new active materials with Yb3+ as a dopant. The anisotropic monoclinic tungstate crystals KY(WO4)2 and KGd(WO4)2 used as hosts for Yb3+ provide larger absorption and emission cross sections and smaller quantum defect than YAG. Especially for the thin disk laser concept highly doped materials with short absorption lengths are appropriate. We present continuous-wave (cw) lasing results with a 100% Yb-doped KYb(WO4)2 (KYbW), the first stoichiometric cw laser based on Yb3+ as an active ion. The cw laser experiments were performed with a 125-μm-thin KYbW sample. The one side high-reflective-coated KYbW crystal was positioned at one end of a V-type laser activity and fixed on a new type of a holder, a "laminar laser mount", which enable direct water cooling of the pumped region of the laser crystal. A home made cw Ti:Sappphire laser served as the pump source. CW laser oscillation was observed at a pump threshold (λpump=1025nm) of 70 mW with a slope efficiency of 21% with respect to the absorbed pump power at room temperature. The maximum output power amounted to 20 mW for a 0.3% outcoupling transmission. The emission spectrum was centered at λL=1068 nm.
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Peter Klopp, Valentin P. Petrov, Uwe Griebner, V. Nikolov, V. Nesterenko, and T. Kirilov "Continuous wave lasing of Yb3+ in a stoichiometric double tungstate", Proc. SPIE 4968, Solid State Lasers XII, (17 June 2003);


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