%0 Journal Article
%T Near infrared few-cycle pulses for high harmonic generation
%A Steffen Driever
%A Konstantin B. Holzner
%A Jean-Christophe Delagnes
%A Nikita Fedorov
%A Martin Arnold
%A Damien Bigourd
%A Eric Cormier
%A Roland Guichard
%A Eric Constant
%A Amelle Zair
%J Physics
%D 2014
%I arXiv
%R 10.1088/0953-4075/47/20/204013
%X We report on the development of tunable few-cycle pulses with central wavelengths from 1.6 um to 2 um. Theses pulses were used as a proof of principle for high harmonic generation in atomic and molecular targets. In order to generate such pulses we produced a filament in a 4 bar krypton cell. Spectral broadening by a factor of 2 to 3 of a 40 fs near infrared input pulse was achieved. The spectrally broadened output pulses were then compressed by fused silica plates down to the few-cycle regime close to the Fourier limit. The auto-correlation of these pulses revealed durations of about 3 cycles for all investigated central wavelengths. Pulses with a central wavelength of 1.7 um and up to 430 uJ energy per pulse were employed to generate high order harmonics in Xe, Ar and N2. Moving to near infrared few-cycle pulses opens the possibility to operate deeply in the non-perturbative regime with a Keldysh parameter smaller than 1. Hence, this source is suitable for the study of the non-adiabatic tunneling regime in most generating systems used for high order harmonic generation and attoscience.
%U http://arxiv.org/abs/1404.1779v1