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The calculation of parametric amplification unit based on nonlinear borate crystals for multiterawatt femtosecond laser system has been carried out. A Gaussian gain profile with a ∼20% dip near the center is proposed to optimize the amplified signal spectral shape. Optimal parameters of the noncollinear type I BBO-based parametric amplifier were established.
We propose the model of the amplification of the transform-limited pulses in a homogeneously broadened medium. The model provides the information about the output characteristics of an unchirped pulse after passing through an active homogeneously broadened medium and about the population inversion inside the medium at any moment of time.
We report, for the first time to our knowledge, the passively Q-switched laser performance of the Yb:YAl3(BO3)4 crystal operating at ~1 mum with a Cr4+:YAG crystal used as the saturable absorber. Employing a compact plano-concave resonator end pumped by a high-power diode, we obtained by using a 2 mm thick alpha -cut crystal a sigma-polarized average output power of 4.15 W at 1041.3 nm with optical-to-optical...
Output power of 470 mW, slope efficiency of 64.5% and tunability between 1016 and 1049 nm are achieved with the novel disordered uniaxial crystal Yb:LiGd(MoO4)2. Both possible polarizations are compared and diode-pumping is also demonstrated.
Maximum output powers of 1.4 and 4 W and slope efficiencies of 60 and 69% were obtained with a Tm:KLu(WO4)2 laser near 2 mum under Ti:sapphire and diode laser pumping, respectively.
The generation of 12.4 W of output power with optical-to-optical conversion efficiency of 47% and slope efficiency of 74% is demonstrated in Yb:KGW laser end-pumped with high-power diode bars. Thermal-lensing and laser tuning has been investigated.
We demonstrate output powers exceeding 4 W with continuous-wave, diode-pumped Yb:TVO4 (T=Y, Gd, and Lu) lasers operated at room temperature. The three orthovanadate hosts are compared in longitudinal and thin-disk pump geometries.
The smallest quantum defect (1.6%) for a laser crystal is demonstrated with a 125 /spl mu/m-thin plate of stoichiometric KYb(WO/sub 4/)/sub 2/. Pumped at 1025 nm, it emitted at 1042 nm.
Mode-locking of the Yb:Sc/sub 2/O/sub 3/ laser with a saturable absorber mirror is demonstrated. The pump efficiency reached 47% in the picosecond regime and with dispersion compensation pulses as short as 230 fs were obtained at 1044.5 nm.
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