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Coherence properties of high-order harmonics : Application to high-density laser-plasma diagnostic

Merdji, H. (author)
IRAMIS: Saclay Institute of Matter and Radiation
Salières, P. (author)
IRAMIS: Saclay Institute of Matter and Radiation
Le Déroff, L. (author)
IRAMIS: Saclay Institute of Matter and Radiation
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Hergott, J. F. (author)
IRAMIS: Saclay Institute of Matter and Radiation
Carré, B. (author)
IRAMIS: Saclay Institute of Matter and Radiation
Joyeux, D. (author)
Institut d'Optique Graduate School
Descamps, D. (author)
Lund University
Norin, J. (author)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Lyng, C. (author)
Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
L'Huillier, A. (author)
Lund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Wahlström, C. G. (author)
Lund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Bellini, M. (author)
European Laboratory for Non-Linear Spectroscopy (LENS)
Huller, S. (author)
The French National Centre for Scientific Research (CNRS)
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 (creator_code:org_t)
2000
2000
English 8 s.
In: Laser and Particle Beams. - 0263-0346. ; 18:3, s. 495-502
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • We present two interferometry schemes in the extreme ultraviolet, based on either the wave-front division of a unique harmonic beam (1st scheme) or two spatially separated, phase-locked harmonic sources (2nd scheme). In the first scheme using a Fresnel bimirror interferometer, we measure the degree of spatial coherence of the 13 th harmonic generated in xenon, as a function of different parameters. A high degree of coherence, larger than 0.5, is found for the best conditions in almost the full section of the beam. Then, we demonstrate that the second scheme can be used for interferometry measurements with an ultrahigh time resolution. The 11th harmonic is used to study the spatial variation of the electron density of a laser-produced plasma. Electronic densities higher than 2.10 20 cm -3 are measured.

Subject headings

NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

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