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Spectroscopy and Lasing of Yb-Doped {\hbox {NaY}}{({\hbox {WO}}_{4})}_{2} : Tunable and Femtosecond Mode-Locked Laser Operation

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9 Author(s)
Garcia-Cortes, A. ; Inst. de Ciencia de Mater. de Madrid, Madrid ; Cano-Torres, J.M. ; Serrano, M. ; Cascales, C.
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Tetragonal (space group f4 macr) single crystals of NaY(WO4)2 doped with Yb to a density of 4.52 times 1020 cm-3 have been employed as laser active materials for the 1-mum spectral range, operating at room temperature. Using Ti:sapphire laser pumping, slope efficiencies as high as 74.6% were achieved without special cooling for the pi-polarization. The Yb-laser was continuously tunable from 1003.7 to 1073.0 nm with a birefringent filter. Pulses as short as 53 fs were obtained at 1035 nm by SESAM passive mode-locking with intracavity dispersion compensation and additional extracavity pulse compression using analogous prism pairs. Experimental data on the spectroscopic properties of Yb3+ in the 5-300 K temperature range and the room temperature optical properties of this novel Yb-host is also presented.

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Quantum Electronics, IEEE Journal of  (Volume:43 ,  Issue: 9 )