Fiber-based Sagnac interferometer for active polarization entangled photon-pair source

Meritxell Cabrejo; André Luis Marques Muniz; Philippe Ancsin; Christopher Spiess; Fabian Steinlechner

doi:10.1117/12.2609030

1 March 2022 Fiber-based Sagnac interferometer for active polarization entangled photon-pair source

Meritxell Cabrejo, André Luis Marques Muniz, Philippe Ancsin, Christopher Spiess, Fabian Steinlechner

Proceedings Volume 12015, Quantum Computing, Communication, and Simulation II; 120150C (2022) https://doi.org/10.1117/12.2609030
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Fiber-based entangled photon sources are a key resource in emerging quantum technologies due to compactness, long-term stability and alignment-free operation. Fast control of the quantum state properties is also necessary in practical scenarios, where a universal source can be employed with different temporal and spectral configurations. Here, we report on a flexible source design that produces high-quality entanglement from continuous-wave up to GHz-pulsed operation modes. Our approach uses off-the-shelf optical components in a Sagnac configuration to generate polarization-entangled photon pairs at telecom wavelength. This design further allows phase modulation above MHz speeds with high fidelity. Together with its 60 nm spectral bandwidth, the proposed system is entirely suitable for wavelength-multiplexed and reconfigurable quantum networks, where state modulation or active bandwidth allocation is required.

Conference Presentation

Citation Download Citation

Meritxell Cabrejo, André Luis Marques Muniz, Philippe Ancsin, Christopher Spiess, and Fabian Steinlechner "Fiber-based Sagnac interferometer for active polarization entangled photon-pair source", Proc. SPIE 12015, Quantum Computing, Communication, and Simulation II, 120150C (1 March 2022); https://doi.org/10.1117/12.2609030

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