scholarly journals Extreme ultraviolet light source at a megahertz repetition rate based on high-harmonic generation inside a mode-locked thin-disk laser oscillator

2017 ◽  
Vol 42 (24) ◽  
pp. 5170 ◽  
Author(s):  
F. Labaye ◽  
M. Gaponenko ◽  
V. J. Wittwer ◽  
A. Diebold ◽  
C. Paradis ◽  
...  
Keyword(s):  
Light Source ◽  
Ultraviolet Light ◽  
Harmonic Generation ◽  
Repetition Rate ◽  
Extreme Ultraviolet ◽  
High Harmonic ◽  
Thin Disk ◽  
Laser Oscillator ◽  
Thin Disk Laser ◽  
Extreme Ultraviolet Light

scholarly journals Electron quantum path control in high harmonic generation via chirp variation of strong laser pulses

2021 ◽  
Author(s):  
Stylianos Petrakis ◽  
Makis Bakarezos ◽  
Michael Tatarakis ◽  
Emmanouil Benis ◽  
Nektarios Papadogiannis
Keyword(s):  
Laser Pulse ◽  
Ultraviolet Light ◽  
Harmonic Generation ◽  
Extreme Ultraviolet ◽  
High Harmonic ◽  
High Harmonic Generation ◽  
Ultrafast Laser ◽  
Temporal Window ◽  
Electron Quantum ◽  
Extreme Ultraviolet Light

Abstract The quantum phases of the electron paths driven by an ultrafast laser in high harmonic generation in an atomic gas depends linearly on the instantaneous cycle-averaged laser intensity. Using high laser intensities, a complete single ionisation of the atomic gas may occur before the laser pulse peak. Therefore, high harmonic generation could be localized only in a temporal window at the leading edge of laser pulse envelope. Varying the laser frequency chirp of an intense ultrafast laser pulse, the centre, and the width of the temporal window, that the high harmonic generation phenomenon occurs, could be controlled with high accuracy. This way, both the duration and the phase of the electron trajectories, that generate efficiently high harmonics, is fully controlled. An accurate and robust method of spectral control and selection of the high harmonic extreme ultraviolet light from distinct quantum paths is experimentally demonstrated. Furthermore, a phenomenological numerical model enlightens the physical processes that take place. This novel approach of the electron quantum path selection via laser chirp is a simple and versatile way of controlling the time-spectral characteristics of the coherent extreme ultraviolet light with future applications in the fields of attosecond pulses and soft x-ray nano-imaging.

Kilohertz extreme-ultraviolet light source based on femtosecond high-order harmonic generation from noble gases

2001 ◽  
Vol 73 (7) ◽  
pp. 687-692 ◽  
Author(s):  
N.A. Papadogiannis ◽  
C. Kalpouzos ◽  
E. Goulielmakis ◽  
G. Nersisyan ◽  
D. Charalambidis ◽  
...  
Keyword(s):  
Light Source ◽  
Ultraviolet Light ◽  
Harmonic Generation ◽  
Noble Gases ◽  
Extreme Ultraviolet ◽  
High Order ◽  
High Order Harmonic Generation ◽  
High Order Harmonic ◽  
Extreme Ultraviolet Light
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