Characterization of partially coherent ultrashort XUV pulses

Charles Bourassin-Bouchet; Marie-Emmanuelle Couprie

doi:10.1117/12.2182428

12 May 2015 Characterization of partially coherent ultrashort XUV pulses

Charles Bourassin-Bouchet, Marie-Emmanuelle Couprie

Proceedings Volume 9512, Advances in X-ray Free-Electron Lasers Instrumentation III; 951209 (2015) https://doi.org/10.1117/12.2182428
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

Abstract

Modern ultrafast metrology relies on the postulate that the pulse to be measured is fully coherent, i.e. that it can be completely described by its spectrum and spectral phase. However, synthesizing fully coherent pulses is not always possible in practice, especially in the domain of emerging ultrashort X-ray sources where temporal metrology is strongly needed. As an example, the lack of longitudinal coherence, that is shot-to-shot fluctuations, of Free-Electron Lasers (FEL) has prevented so far their full amplitude and phase temporal characterization. To sort out this issue, we have adapted Frequency-Resolved Optical Gating (FROG), the first and one of the most widespread techniques for pulse characterization, to enable the measurement of partially coherent XUV pulses even down to the attosecond timescale. Especially, this technique allows one to overcome the sources of decoherence that normally prevent a pulse measurement, such as the spectrometer resolution or the presence of XUV/laser arrival time jitter.

Citation Download Citation

Charles Bourassin-Bouchet and Marie-Emmanuelle Couprie "Characterization of partially coherent ultrashort XUV pulses", Proc. SPIE 9512, Advances in X-ray Free-Electron Lasers Instrumentation III, 951209 (12 May 2015); https://doi.org/10.1117/12.2182428

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