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Spectral characterization of SPDC-based single-photon sources for quantum key distribution

Euler, Sabine ; Fitzke, Erik ; Nikiforov, Oleg ; Hofmann, Daniel ; Dolejsky, Till ; Walther, Thomas (2024)
Spectral characterization of SPDC-based single-photon sources for quantum key distribution.
In: The European Physical Journal Special Topics, 2021, 230 (4)
doi: 10.26083/tuprints-00023597
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Spectral characterization of SPDC-based single-photon sources for quantum key distribution
Language: English
Date: 8 April 2024
Place of Publication: Darmstadt
Year of primary publication: June 2021
Place of primary publication: Berlin ; Heidelberg
Publisher: Springer
Journal or Publication Title: The European Physical Journal Special Topics
Volume of the journal: 230
Issue Number: 4
DOI: 10.26083/tuprints-00023597
Corresponding Links:
Origin: Secondary publication DeepGreen

In our laboratory, we employ two biphoton sources for quantum key distribution. The first is based on cw parametric down-conversion of photons at 404 nm in PPKTP waveguide chips, while the second is based on the pulsed parametric down-conversion of 775 nm photons in PPLN waveguides. The spectral characterization is important for the determination of certain side-channel attacks. A Hong-Ou-Mandel experiment employing the first photon source revealed a complex structure of the common Hong-Ou-Mandel dip. By measuring the spectra of the single photons at 808 nm, we were able to associate these structures to the superposition of different transverse modes of the pump photons in our waveguide chips. The pulsed source was characterized by means of single-photon spectra measured by a sensitive spectrum analyzer as well as dispersion-based measurements. Finally, we also describe Hong-Ou-Mandel experiments using the photons from the second source.

Uncontrolled Keywords: Condensed Matter Physics, Materials Science, general, Atomic, Molecular, Optical and Plasma Physics, Physics, general, Measurement Science and Instrumentation, Classical and Continuum Physics
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-235973
Additional Information:

Part of a collection: Non-Equilibrium Systems and Foundations of Quantum Physics

Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 05 Department of Physics > Institute of Applied Physics
Date Deposited: 08 Apr 2024 12:33
Last Modified: 10 Apr 2024 06:06
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/23597
PPN: 517008068
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