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Spatial and spectral properties of the high-order harmonic emission in argon for seeding applications

He, Xinkui LU ; Miranda, Miguel LU ; Schwenke, Jörg LU ; Guilbaud, Olivier LU ; Ruchon, Thierry LU ; Heyl, C.; Georgiadou, Elisavet LU ; Rakowski, Rafal LU ; Persson, Anders LU and Gaarde, Mette LU , et al. (2009) In Physical Review A (Atomic, Molecular and Optical Physics) 79(6).
Abstract
We characterize and control the harmonic emission in the spectral and spatial domains in order to define in which conditions the harmonic radiation can be a high-quality seed for soft x-ray and x-ray free-electron lasers. The length of the gas cell, where harmonics are generated, was optimized and the energy per pulse was determined in absolute value with a calibrated x-ray photodiode. The beam spatial profile was measured and, in some conditions, a very collimated beam with a half-angle divergence below 1 mrad could be obtained. We also show that increasing the intensity of the fundamental laser field leads to a considerable broadening of the bandwidth of the harmonic radiation, allowing us to cover a large spectral range. This effect is... (More)
We characterize and control the harmonic emission in the spectral and spatial domains in order to define in which conditions the harmonic radiation can be a high-quality seed for soft x-ray and x-ray free-electron lasers. The length of the gas cell, where harmonics are generated, was optimized and the energy per pulse was determined in absolute value with a calibrated x-ray photodiode. The beam spatial profile was measured and, in some conditions, a very collimated beam with a half-angle divergence below 1 mrad could be obtained. We also show that increasing the intensity of the fundamental laser field leads to a considerable broadening of the bandwidth of the harmonic radiation, allowing us to cover a large spectral range. This effect is due to fundamental reshaping leading to an efficient phase matching of both short- and long-trajectory contributions. (Less)
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publication status
published
subject
keywords
atom-photon collisions, argon, laser beams, generation, optical phase matching, optical harmonic
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
79
issue
6
publisher
American Physical Society (APS)
external identifiers
  • wos:000267700100179
  • scopus:67649306843
ISSN
1050-2947
DOI
10.1103/PhysRevA.79.063829
language
English
LU publication?
yes
id
5938a14e-97c2-4953-bf9d-96cb9a33f29a (old id 1462386)
date added to LUP
2009-08-31 10:53:16
date last changed
2017-11-12 03:26:09
@article{5938a14e-97c2-4953-bf9d-96cb9a33f29a,
  abstract     = {We characterize and control the harmonic emission in the spectral and spatial domains in order to define in which conditions the harmonic radiation can be a high-quality seed for soft x-ray and x-ray free-electron lasers. The length of the gas cell, where harmonics are generated, was optimized and the energy per pulse was determined in absolute value with a calibrated x-ray photodiode. The beam spatial profile was measured and, in some conditions, a very collimated beam with a half-angle divergence below 1 mrad could be obtained. We also show that increasing the intensity of the fundamental laser field leads to a considerable broadening of the bandwidth of the harmonic radiation, allowing us to cover a large spectral range. This effect is due to fundamental reshaping leading to an efficient phase matching of both short- and long-trajectory contributions.},
  author       = {He, Xinkui and Miranda, Miguel and Schwenke, Jörg and Guilbaud, Olivier and Ruchon, Thierry and Heyl, C. and Georgiadou, Elisavet and Rakowski, Rafal and Persson, Anders and Gaarde, Mette and L'Huillier, Anne},
  issn         = {1050-2947},
  keyword      = {atom-photon collisions,argon,laser beams,generation,optical phase matching,optical harmonic},
  language     = {eng},
  number       = {6},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Spatial and spectral properties of the high-order harmonic emission in argon for seeding applications},
  url          = {http://dx.doi.org/10.1103/PhysRevA.79.063829},
  volume       = {79},
  year         = {2009},
}