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Spatially-uniform temporal recompression of intense femtosecond optical pulses |
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| Authors: | S. Mironov P. Lassonde J.-C. Kieffer E. Khazanov G. Mourou |
| Affiliation: | 1. Institute of Applied Physics Russian Academy of Sciences, 46 Ul’yanov Street, 603950, Nizhni Novgorod, Russia 2. Institut national de la recherche scientifique, Centre énergie Matériaux Télécommunications 1650, boulevard Lionel-Boulet, Varennes (Québec) J3X 1S2, Quebec City, Canada 4. University of Nizhni Novgorod, 23 Prospekt Gagarina, 603950, Nizhni Novgorod, Russia 3. IZEST, Ecole Polytechnique, 91128, Palaiseau, France |
| Abstract: | A specially designed telescope with defocusing lens and off-axis parabolic mirror, which is working as a nonlinear element and producing self-phase modulation, was implemented for intense (3.1?TW/cm2) Fourier Transform Limit femtosecond laser pulses with Gaussian beam profiles. The pulse spectrum was broadened quasi- homogeneously over the beam cross-section due to the change in the lens thickness compensating for the reduction of the beam intensity from its center to periphery. In experimental demonstrations a set of chirped mirrors allowed for the spectral phase correction to a final pulse compression of 20?fs from 40?fs. |
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