Document Detail

Controlling high harmonics generation by spatial shaping of high-energy femtosecond beam.
MedLine Citation:
PMID:  21725453     Owner:  NLM     Status:  In-Data-Review    
We demonstrate controlled high-order harmonic generation in gas using high-energy femtosecond pulses (50 fs-50 mJ on target) by performing spatial shaping of the terrawatt fundamental laser beam. We have developed a two optical paths mirror that can withstand high power and shape the pump beam into a quasi-flat-top profile (super Gaussian) near focus. We observe clear signatures of the spatial shaping on the harmonic beam in terms of profile, divergence, level of signal, and spectrum. The harmonic generation in neon with a quasi-flat-top beam results in a broadband extreme UV beam with extremely low divergence (∼340 μrad).
A Dubrouil; Y Mairesse; B Fabre; D Descamps; S Petit; E Mével; E Constant
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Optics letters     Volume:  36     ISSN:  1539-4794     ISO Abbreviation:  Opt Lett     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-07-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7708433     Medline TA:  Opt Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2486-8     Citation Subset:  IM    
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