CaltechAUTHORS
Published April 1, 2021 | Version public
Journal Article Metadata-only

Compact energy–time entanglement source using cascaded nonlinear interactions

Creators

  • 1. ROR icon University of Calgary
  • 2. ROR icon California Institute of Technology
  • 3. ROR icon University of Electronic Science and Technology of China
  • 4. ROR icon Battelle
  • 5. ROR icon Delft University of Technology

Abstract

Entangled photon pair sources are essential for applications such as quantum communication and metrology. Here we present a compact energy–time entangled photon pair source at telecom wavelengths realized through cascaded second harmonic generation and spontaneous parametric down conversion in a single periodically poled lithium niobate waveguide. We introduce and characterize methods to diminish the effects of Raman scattering, the principal being quasi-CW pumping. The quality of energy–time entanglement produced by the compact source is analyzed using two-photon interference and Franson interference, and visibilities as high as 93.9%±0.4% and 90.5%±0.6% are achieved, respectively.

Additional Information

© 2021 Optical Society of America. Received 31 July 2020; revised 23 February 2021; accepted 7 March 2021; posted 9 March 2021 (Doc. ID 404312); published 31 March 2021. The authors acknowledge V. Kiselyov for technical support. The detectors were provided by V.B. Verma and S.W. Nam. Funding: Alberta Innovates - Technology Futures; Natural Sciences and Engineering Research Council of Canada; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO); Canadian Institute for Advanced Research (CIFAR); National Key Research and Development Program of China (2018YFA0307400); National Natural Science Foundation of China (61405030, 61775025). The authors declare no conflicts of interest. Data Availability: Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

Additional details

Identifiers

Eprint ID
108896
Resolver ID
CaltechAUTHORS:20210430-090245990

Funding

Alberta Innovates Technology Futures
Natural Sciences and Engineering Research Council of Canada (NSERC)
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
Canadian Institute for Advanced Research (CIFAR)
National Key Research and Development Program of China
2018YFA0307400
National Natural Science Foundation of China
61405030
National Natural Science Foundation of China
61775025

Dates

Created
2021-04-30
Created from EPrint's datestamp field
Updated
2021-04-30
Created from EPrint's last_modified field