Suppressing Parasitic Nonlinear Processes in Frequency-Degenerate Photon Pairs Emission in Layer-Poled TFLN Waveguides
Suppression of noise photons from unwanted nonlinear processes is a major hurdle in generating frequency-degenerate correlated photon pairs for quantum information, e.g. continuous-variable quantum computing [1]. On-chip, telecom-pumped and frequency-degenerate photon pairs have been produced either using second harmonic generation (SHG) followed by spontaneous parametric down conversion (SPDC) in thin film lithium niobate (TFLN) waveguides [2], or by dual-pump spontaneous four-wave mixing (DP-SFWM) in microresonators [3], [4]. However, the former needs careful filtering of the SHG pump, while the latter suffers from single-pump (SP-) SFWM contributions, which decrease the purity of the generated quantum states. SP-SFWM can be suppressed by linearly coupling resonators at the expense of reduced bandwidth [3] or efficiency [4].
Authors
- Davide Grassani (ORCID: https://orcid.org/0000-0001-5352-9627)
- Andrea Volpini (ORCID: https://orcid.org/0000-0001-9849-4157)
- Olivier Dubochet (ORCID: https://orcid.org/0000-0003-4668-0059)
- Yeşim Koyaz (ORCID: https://orcid.org/0009-0002-3112-7867)
- Charles Caër (ORCID: https://orcid.org/0000-0002-2735-2423)
- Homa Zarebidaki (ORCID: https://orcid.org/0000-0002-7670-2311)
- Camille‐Sophie Brès (ORCID: https://orcid.org/0000-0003-2804-1675)
- Jean-Étienne Tremblay (ORCID: https://orcid.org/0009-0007-9367-0458)
- Daniele Bajoni (ORCID: https://orcid.org/0000-0001-6506-8485)
- Hamed Sattari (ORCID: https://orcid.org/0000-0002-4792-429X)
- Olivia Hefti (ORCID: https://orcid.org/0009-0004-5958-2882)
- Iván Prieto (ORCID: https://orcid.org/0000-0002-7370-5357)
- Matteo Galli
- Marco Clementi
- Enrico Melani
Institutions
- Swiss Center for Electronics and Microtechnology (Switzerland) (CH)
- École Polytechnique Fédérale de Lausanne (CH)
Publication Details
- Published
- 2025-06-23
- DOI
- https://doi.org/10.1109/cleo/europe-eqec65582.2025.11111320
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation