Open AccessGeneration of multi-millijoule red-shifted pulses for seeding stimulated Raman backscattering amplifiers
Author(s) -
B. Landgraf,
Andreas Hoffmann,
Daniil Kartashov,
Felix Gärtner,
Zhanna Samsonova,
Pavel Polynkin,
J. Jacoby,
T. Kühl,
Christian Spielmann
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.007400
Subject(s) - optics , femtosecond , materials science , filamentation , regenerative amplification , laser , beam (structure) , amplifier , bessel beam , nonlinear optics , sum frequency generation , raman scattering , joule (programming language) , raman spectroscopy , optical amplifier , optoelectronics , physics , energy (signal processing) , cmos , quantum mechanics
The efficient generation of redshifted pulses from chirped femtosecond joule level Bessel beam pulses in gases is studied. The redshift spans from a few 100 cm⁻¹ to several 1000 cm⁻¹ corresponding to a shift of 50-500 nm for Nd:glass laser systems. The generated pulses have an almost perfect Gaussian beam profile insensitive of the pump beam profile, and are much shorter than the pump pulses. The highest measured energy is as high as 30 mJ, which is significantly higher than possible with solid state nonlinear frequency shifters.