Second-generation High-Order Harmonic Sources — From CPA to OPCPA
Summary, in English
high-order harmonic generation (HHG) in gases. The sources were developed for
experiments requiring high-flux harmonic beams or HHG pulses at high-repetition
rate. These were used experimentally to image nano-scale objects. The high-flux HHG
source was used for digital in-line holography, and the high-repetition rate source for
photoemission electron microscopy. In addition, a conceptual design for a high-flux
gas beamline for a large scale facility, Extreme Light Infrastructure - Attosecond Light
Pulse Source, is described.
The work focuses on the construction and development of the driving laser systems
and the HHG sources, as well as on the optimization of their performance. The thesis
describes the two lasers used to drive the HHG sources: a high-power laser system
and a newly built optical parametric chirped pulse amplification (OPCPA) system.
The two systems are both based on the chirped pulse amplification technique, but the
amplification process is carried out in different ways. The high-power laser system is
based on linear amplification in Ti:Sapphire while the OPCPA system uses nonlinear
amplification via difference frequency generation.
Furthermore, the use of multi-color driving fields to manipulate the generation process,
both from the microscopic and the macroscopic points of view, was investigated.
The combination of the fundamental field with its second harmonic in a non-collinear
geometry allows us to probe and control macroscopic properties. The addition of loworder
odd harmonics in a collinear geometry results in an enhancement of the single
- Atom and Molecular Physics and Optics
- Optical parametric chirped pulse amplification
- Fysicumarkivet A:2014:Rudawski
- Chirped pulse amplification
- High-order harmonic generation
- Attosecond pulse
- Anne L'Huillier
- ISBN: 978-91-7473-940-4
9 May 2014
Lecture hall Rydbergsalen, Department of Physics, Professorsgatan 1, Lund University Faculty of Engineering
- Eric Cormier (Prof.)