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Spatial and spectral coherence in propagating high-intensity twin beams
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SYSNO ASEP 0451759 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Spatial and spectral coherence in propagating high-intensity twin beams Author(s) Haderka, O. (CZ)
Machulka, R. (CZ)
Peřina, Jan (FZU-D) RID, SAI, ORCID
Allevi, A. (IT)
Bondani, M. (IT)Source Title Scientific Reports. - : Nature Publishing Group - ISSN 2045-2322
Roč. 5, Sep (2015), s. 14365Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords spatial and spectral coherence ; high-intensity twin beams Subject RIV BH - Optics, Masers, Lasers R&D Projects GAP205/12/0382 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000361770800001 EID SCOPUS 84942794167 DOI 10.1038/srep14365 Annotation Spatial and spectral coherence of high-intensity twin-beam states propagating from the near-field to the far-field configurations is experimentally investigated by measuring intensity auto-and cross-correlation functions. The experimental setup includes a moving crystal and an iCCD camera placed at the output plane of an imaging spectrometer. Evolution from the tight near-field spatial position cross-correlations to the far-field momentum cross-correlations, accompanied by changeless spectral cross-correlations, is observed. Intensity autocorrelation functions and beam profiles are also monitored as they provide the number of degrees of freedom constituting the down-converted beams. The strength of intensity cross-correlations as an alternative quantity for the determination of the number of degrees of freedom is also measured. The relation between the beam coherence and the number of degrees of freedom is discussed. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
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