Portable integrated quantum optics for quantum communication

Tiphaine Kouadou; David Diaz; Paul G. Kwiat

doi:10.1117/12.2680341

19 July 2023 Portable integrated quantum optics for quantum communication

Tiphaine Kouadou, David Diaz, Paul G. Kwiat

Proceedings Volume 12633, Photonics for Quantum 2023; 126330A (2023) https://doi.org/10.1117/12.2680341
Event: Photonics for Quantum, 2023, Rochester, New York, United States

Abstract

We present integrated sources of polarization entanglement built on portable platforms for quantum communication. We employ type-II degenerate spontaneous parametric down conversion processes in PPKTP waveguides to generate pairs of orthogonally polarized photons at near-infrared wavelengths. The photons are sent to a 50/50 non-polarizing beam splitter (NPBS) to generate post-selected polarization-entangled states via coincidence measurements. The small size of the waveguides allows the installation of several units on the same platform, and thereby the generation of multiple entangled states simultaneously. We use a computer-controlled tomography system to characterize the produced states and combine the photons from adjacent waveguides on another NPBS to perform Bell-state measurements, a prerequisite to entanglement swapping. The overall experiment is compact and requires little alignment when set, making it an attractive option for local quantum networking using mobile platforms, e.g., drones or satellites.

Conference Presentation

Citation Download Citation

Tiphaine Kouadou, David Diaz, and Paul G. Kwiat "Portable integrated quantum optics for quantum communication", Proc. SPIE 12633, Photonics for Quantum 2023, 126330A (19 July 2023); https://doi.org/10.1117/12.2680341

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