Directly diode-pumped Yb:KY(WO_4)_2 regenerative amplifiers

Liu, Hsiao Hua; Nees, J.; Mourou, G.

doi:10.1364/ol.27.000722

Cited by 29 publications

(11 citation statements)

References 7 publications

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“…17 Also regenerative amplification of fs pulses in KYW:Yb was demonstrated in 2001. 18 Whereas femtosecond pulses can provide the ultimate peak powers, much higher average powers and optimum conditions for frequency conversion to other wavelengths can be realized with slightly longer pulses ͑1 ps or more for Raman conversion͒. We note here only that the highest average power directly produced by a mode-locked laser ͑16.2 W͒ has been achieved with a thin disk YAG:Yb laser.…”

Section: Introductionmentioning

confidence: 89%

Growth, optical characterization, and laser operation of a stoichiometric crystalKYb(WO4)2

et al. 2002

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We present our recent achievements in the growing and optical characterization of KYb(WO 4 ) 2 ͑hereafter KYbW͒ crystals and demonstrate laser operation in this stoichiometric material. Single crystals of KYbW with optimal crystalline quality have been grown by the top-seeded-solution growth slow-cooling method. The optical anisotropy of this monoclinic crystal has been characterized, locating the tensor of the optical indicatrix and measuring the dispersion of the principal values of the refractive indices as well as the thermo-optic coefficients. Sellmeier equations have been constructed valid in the visible and near-IR spectral range. Raman scattering has been used to determine the phonon energies of KYbW and a simple physical model is applied for classification of the lattice vibration modes. Spectroscopic studies ͑absorption and emission measurements at room and low temperature͒ have been carried out in the spectral region near 1 m characteristic for the ytterbium transition. Energy positions of the Stark sublevels of the ground and the excited state manifolds have been determined and the vibronic substructure has been identified. The intrinsic lifetime of the upper laser level has been measured taking care to suppress the effect of reabsorption and the intrinsic quantum efficiency has been estimated. Lasing has been demonstrated near 1074 nm with 41% slope efficiency at room temperature using a 0.5 mm thin plate of KYbW. This laser material holds great promise for diode pumped high-power lasers, thin disk and waveguide designs as well as for ultrashort ͑ps/fs͒ pulse laser systems.

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Section: Introductionmentioning

confidence: 89%

Growth, optical characterization, and laser operation of a stoichiometric crystalKYb(WO4)2

et al. 2002

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“…Additional advantages are a simple electronic structure that avoids loss processes such as concentration quenching, upconversion, and excited-state absorption and a long upper-state lifetime (millisecond range). Yb-doped hosts have def initely been shown to be attractive for femtosecond oscillators 8,9 and amplif iers, 11 and they have recently reached a very high power level in the subpicosecond regime. 7 Generally these materials can be grouped into broadly tunable ones: glasses or crystals with low thermal conductivity, such as CaF 2 is a well-known laser crystal: in fact, what are to our knowledge the first diode-pumped laser 13 and the f irst ceramic laser 14 were based on a CaF 2 matrix.…”

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confidence: 99%

High-power diode-pumped Yb^3+:CaF_2 femtosecond laser

et al. 2004

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“…The laser performances of Yb 3+ -doped KY(WO 4 ) 2 crystal with high slope efficiency have been demonstrated [5][6][7][8][9]. The crystal structure of KY(WO 4 ) 2 is monoclinic with space group C 2/c (C 6 2 h ) [10,11] Fig.…”

Section: Introductionmentioning

confidence: 98%