Ursula Keller

Femtosecond optical parametric generation (OPG) in periodically poled stoichiometric LiTaO/sub 3/ with >1 W average power

Summary form only given. We present a parametric generator based on the novel nonlinear material periodically poled stoichiometric LiTaO/sub 3/ (PPSLT) and a recently developed high-power femtosecond Yb:KY(WO/sub 4/)/sub 2/ (Yb:KYW) thin-disk laser. We achieved simple and robust single-pass OPG at the full repetition rate of 24 MHz. We obtained stable 1 W signal power in 320 fs-pulses with a good transverse beam quality (M/sup 2/ = 1.1) at 1.45 /spl mu/m and 0.6 W of idler power at 3.55 /spl mu/m for 7.8 W pump power. For a few minutes, even 2.5 W of signal output power have been achieved. The damage resistance of PPSLT seems to be significantly better than for congruent PPLN.

Continuous-Wave Yb-Doped Sesquioxide Thin Disk Lasers with up to 300 W Output Power and 74% Efficiency

We obtained 301W of output power, 88% slope efficiency, and 74% optical-to-optical efficiency with VBG-diode-pumped Yb:Lu2O3 thin disk lasers. Yb:Sc2O3 and Yb:LuScO3 showed comparable performance, delivering 264W and 250W of output power, respectively.

Efficient Mode-Locked Yb:Lu 2 O 3 Thin Disk Laser with an Average Power of 103 W

We demonstrate power scaling of an Yb:Lu2O3 thin-disk laser to an average power of 103 W setting a new record for mode-locked laser oscillators. The laser generates 885-fs pulses with an optical-to-optical efficiency of 42%.

Experimental Confirmation of Quasi-Soliton Pulse Formation in Ultrafast VECSELs

A detailed experimental study on pulse formation in ultrafast VECSELs confirms that shortest pulses require slightly positive dispersion to balance saturation effects. These results are in good agreement with simulations, confirming the quasi-soliton pulse-formation theory.

100 GHz Passively Mode-Locked Er:Yb:Glass Laser at 1.5 µm and Experimental Identification of Transverse Cavity-Mode Degeneracies

A fundamentally modelocked Er:Yb:glass laser with a record high repetition rate of 100 GHz generates 8.6 mW average power in 1.64-ps pulses in the 1.5-µm telecom window. Frequency degeneracies of transverse cavity-modes are investigated.

Efficient Femtosecond Yb:Lu 2 O 3 Thin Disk Laser

We demonstrate the first mode-locked Yb:Lu2O 3 thin disk laser, obtaining 370-fs pulses with 20.5 W average power. The 43% optical-to-optical efficiency obtained with 523-fs pulses is higher than for previous mode-locked thin disk lasers.

High-power femtosecond nonlinear devices pumped with a mode-locked thin disk laser

We report on experiments with high-power femtosecond pulses from a passively mode-locked thin disk Yb:YAG laser: nonlinear fiber compression to 33 fs with 18 W average power and a fiber-feedback parametric oscillator generating 15 W in the 1.5-/spl mu/m region.

Femtosecond Thin Disk Lasers Exceed Pulse Energies of 10 Microjoules and Enable High Field Physics Experiments

We achieve 10-microjoule pulse energies directly from a femtosecond laser oscillator. We underline its suitability for high field experiments at multi-megahertz repetition rate by demonstrating the first electron spectroscopy measurements driven by an oscillator.

Efficient Femtosecond Yb:Lu^2O^3Thin Disk Laser

We demonstrate the first mode-locked Yb:Lu2O 3 thin disk laser, obtaining 370-fs pulses with 20.5 W average power. The 43% optical-to-optical efficiency obtained with 523-fs pulses is higher than for previous mode-locked thin disk lasers.

Passively Mode-Locked Surface-Emitting Semiconductor Lasers with High Repetition Rates of up to 30 GHz

We present high-repetition-rate passively mode-locked vertical external-cavity surface-emitting semiconductor lasers with average output powers of 1.4 W in 6.1-ps pulses at 10 GHz and 25 mW in 4.7-ps pulses at 30 GHz.