Spectral analysis of high-order harmonics generated by 30-fs and sub-10-fs laser pulses |
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Authors: | M Nisoli S Stagira G Cerullo S De Silvestri O Svelto P Ceccherini L Poletto G Tondello P Villoresi and C Altucci |
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Institution: | (1) Akadempribor Scientific Association, Academy of Sciences of Uzbekistan, Tashkent, 700125, Uzbekistan;(2) Laser Plasma Division, Raja Ramanna Centre for Advanced Technology, Indore, 452013, India |
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Abstract: | The spectral properties of harmonic radiation generated in neon by laser pulses with duration from 30 fs down to 5 fs have been investigated. In the 30-fs temporal regime we have achieved continuously tunable sub-20-nm radiation by changing the gas jet position relative to the laser beam waist. We show that the results of a one-dimensional propagation code partially including three-dimensional focusing effects are in good agreement with the experimental results. Finally, we have performed a spectral characterization of harmonic radiation in the sub-10-fs temporal regime. |
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