Rubidium-doped KTiOPO<sub>4</sub> waveguides as a dual-type photon-pair source
We investigate the dual generation of type-0 and type-II spontaneous parametric down conversions (SPDCs) within a single periodically poled rubidium-doped KTiOPO 4 (PPRKTP) waveguide. By coupling a 45° linearly polarized pump laser into the waveguide, both SPDC processes are concurrently excited: type-0 SPDC process is facilitated via third-order quasi-phase matching (QPM) utilizing the nonlinear coefficient d 33 , while type-II SPDC process employs first-order QPM with the nonlinear coefficient d 24 . This dual-SPDC scheme holds potential for applications in quantum communication protocols targeting the telecommunication wavelength.
Authors
- Markus Gräfe (ORCID: https://orcid.org/0000-0001-8361-892X)
- P.J. Hendra (ORCID: https://orcid.org/0009-0008-2121-3538)
- Valerio Flavio Gili (ORCID: https://orcid.org/0000-0001-8723-9986)
- Josué R. León-Torres
Institutions
- Technische Universität Darmstadt (DE)
- Friedrich Schiller University Jena (DE)
Publication Details
- Journal
- Journal of the Optical Society of America B
- Published
- 2025-07-24
- DOI
- https://doi.org/10.1364/josab.567775
- Primary Topic
- Photonic and Optical Devices
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- European Commission
- Deutsche Forschungsgemeinschaft
- Bundesministerium für Bildung und Forschung