Andreas Tünnermann

TL;DR: In this article, the concept of divided-pulse amplification is extended to nonlinear compression, and the authors demonstrate splitting, spectral broadening, recombination and compression to sub-100 fs for four pulse replicas.

TL;DR: In this paper, the photorefractive index changes in singlemode annealed proton exchanged channel waveguides are measured for guided powers of more than 100mW at 1064nm.

TL;DR: In this article, the authors report the first proof-of-principle experiment demonstrating high average power optical demodulation of a fiber amplified phase-modulated single frequency signal with a sideband suppression of more than 30 dB.

TL;DR: In this paper, an environmentally stable all-normal dispersion mode-locked single-polarization large-mode-area microstructure fiber was proposed for a self-starting laser with 16 W of average power at 63 MHz repetition rate.

TL;DR: In this paper, the authors investigate the possibility of exciting the wakefield of the plasma wave with trains of low-energy laser pulses rather than a single high-energy pulse and show that this approach can enable the use of different technologies, such as fibre or thin-disc lasers, which are able to operate at multi-kilohertz pulse repetition rates and with wall-plug efficiencies two orders of magnitude higher than current laser systems.