Abstract It is now possible to produce a 10 Hz soft x-ray laser beam having very high optical qualities. The solution consists in seeding an optical-field-ionized population inverted plasma amplifier with the 25th harmonic of an infrared laser. This concept was successfully realized in LOA in 2004 and an extensive investigation of the source has been recently performed. Indeed we demonstrate the first diffraction-limited laser beam in the soft x-ray spectral range. This laser beam at a central wavelength of 32.8 nm, emitted with a divergence of 0.67 mrad at a repetition rate of 10 Hz. The beam exhibits a regular Gaussian spatial profile, and wavefront distortions smaller than λ/17. A theoretical analysis of these results shows that this high beam quality is due to spatial filtering of the seed beam by the plasma amplifier aperture
Spatial Filtering of High Order Harmonics by an OFI Plasma Amplifier
2009-01-01
8 pages
Article/Chapter (Book)
Electronic Resource
English
Complex Amplitude , Amplify Spontaneous Emission , High Order Harmonic , High Optical Quality , High Beam Quality Physics , Optics and Electrodynamics , Atomic, Molecular, Optical and Plasma Physics , Quantum Optics , Laser Technology, Photonics , Atoms and Molecules in Strong Fields, Laser Matter Interaction , Plasma Physics
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