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  Direct measurement of the coupled spatiotemporal coherence of parametric down-conversion under negative group-velocity dispersion

Cutipa, P., Spasibko, K., & Chekhova, M. (2020). Direct measurement of the coupled spatiotemporal coherence of parametric down-conversion under negative group-velocity dispersion. Optics Letters, 45(13), 3581-3584. doi:10.1364/OL.397700.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-9CA6-F Version Permalink: http://hdl.handle.net/21.11116/0000-0006-9CA7-E
Genre: Journal Article

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 Creators:
Cutipa, Paula1, 2, Author              
Spasibko, Kirill1, 2, Author              
Chekhova, Maria1, 2, 3, Author              
Affiliations:
1Chekhova Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364715              
2University of Erlangen-Nuremberg, Staudtstraße 7/B2, 91058 Erlangen, Germany, ou_persistent22              
3Physics Department, Moscow State University, Leninskiye Gory 1-2, Moscow 119991, Russia, ou_persistent22              

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 Abstract: We present a direct measurement of the spatiotemporal coherence of parametric down-conversion in the range of negative group-velocity dispersion. In this case, the frequency-angular spectra are ring-shaped, and temporal coherence is coupled to spatial coherence. Correspondingly, the lack of coherence due to spatial displacement can be compensated for with the introduction of time delay. We show a simple technique, based on a modified Mach– Zehnder interferometer, which allows us to measure time coherence and near-field space coherence simultaneously, with complete control over both variables. This technique is also suitable for the measurement of second-order coher- ence, where the main applications are related to two-photon spectroscopy.

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 Dates: 2020-06-26
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1364/OL.397700
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Title: Optics Letters
Source Genre: Journal
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Publ. Info: Washington : Optical Society of America
Pages: - Volume / Issue: 45 (13) Sequence Number: - Start / End Page: 3581 - 3584 Identifier: ISSN: 0146-9592
CoNE: https://pure.mpg.de/cone/journals/resource/954925474435