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Controlling electron moment by a laser pulse (an application of the streaking principle) * Applications By varying laser intensity rather than time, the final electron momenta can be manipulated in a straightforward way. Photoelectron spectra generated at different light field strengths by an isolated subfemtosecond x-ray pulse. * Applications the model x-ray spectrum (2) Harmonic emission, within a laser oscillation period, confined to a small fraction of To/2 (within a limited frequency band near the cutoff) * Trains of pulses of 11 harmonics (from 41st to 61st) emitted by a neon atom. (Laser paramters: 4×1014w/cm2, 825nm) Production of as pulse trains (3) Multifrequency cascaded stimulated Raman scattering (CSRS) Pulse trains: external phase compensation (in ps-pump regime) Single sub-fs pulses: a novel broadening mechanism of Raman lines?a quasicontinuous spectrum ? generate single sub-fs pulses * Production of as pulse trains (3) Multifrequency cascaded stimulated Raman scattering (CSRS)(continued) * Production of as pulse trains Pulse train and spectrum for ps-pulse excitation: (a) pulse shape (solid curve) and polarization (dashed curve), (b) spectrum, (c) pulse train after perfect phase compensation for two 1-ps input pulses with intensity I0 =2×1011 W/cm2 and frequencies shown by arrows in (b) at Z=10 cm. Inset shows the central compressed pulse. (3) Multifrequency cascaded stimulated Raman scattering (CSRS)(continued) * Spectrum (solid curve) and spectral phase (dotted curve) for sub-ps excitation without (a) and with (b) account of dispersion and Kerr effect; (c) single sub-fs pulse after phase compensation of the spectrum shown in (b) by a modulator with 256 pixels (solid curve) and an ideal compressor (dashed curve). Distance is 25 cm and I0= 1012w/cm2, t=200fs. Production of as pulse trains (2’) High harmonic generation with few cycle laser pulses * Time dependence of the laser field (bold line), ionization pro
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