On-chip analysis of time-bin encoded photons

Ujaan Purakayastha; Benjamin E. Nussbaum; John C. Floyd; Christopher C. Evans; Joel M. Hensley; Paul G. Kwiat

doi:10.1117/12.2649202

8 March 2023 On-chip analysis of time-bin encoded photons

Ujaan Purakayastha, Benjamin E. Nussbaum, John C. Floyd, Christopher C. Evans, Joel M. Hensley, Paul G. Kwiat

Proceedings Volume 12446, Quantum Computing, Communication, and Simulation III; 1244613 (2023) https://doi.org/10.1117/12.2649202
Event: SPIE Quantum West, 2023, San Francisco, California, United States

Conference Poster

Abstract

Two main challenges for quantum networks are state preservation and scaling current infrastructure. Photonic polarization qubits are susceptible to effective decoherence via polarization mode dispersion in optical fibers. This can be circumvented by encoding qubits in the photon’s arrival time, i.e., time-bin encoding. Here, we present measurements on a thin-film lithium niobate integrated-optic device, designed to analyze telecom-wavelength photonic time-bin qubits. By thermo-optically tuning the phase and amplitudes of interfering processes traversing the photonic circuit on the device, we are able to obtain ∼ 83% interference visibility, marking significant progress towards efficient time-bin encoding and analysis with integrated photonics.

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Ujaan Purakayastha, Benjamin E. Nussbaum, John C. Floyd, Christopher C. Evans, Joel M. Hensley, and Paul G. Kwiat "On-chip analysis of time-bin encoded photons", Proc. SPIE 12446, Quantum Computing, Communication, and Simulation III, 1244613 (8 March 2023); https://doi.org/10.1117/12.2649202

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