Toward a reconfigurable quantum network enabled by a broadband entangled source

Zhu, Eric Y., Corbari, Costantino, Gladyshev, Alexey, Kazansky, Peter G., Lo, Hoi Kwong and Qian, Li (2019) Toward a reconfigurable quantum network enabled by a broadband entangled source. Journal of the Optical Society of America B: Optical Physics, 36 (3), B1-B6. (doi:10.1364/JOSAB.36.0000B1).

Abstract

We present a proof-of-principle experimental demonstration of a reconfigurable entanglement distribution scheme utilizing a poled fiber-based source of broadband polarization-entangled photon pairs and dense wavelength-division multiplexing. A large bandwidth (>90 nm, centered at 1555 nm) and highly spectrally correlated nature of the entangled source can be exploited to allow for the generation of more than 25 frequency-conjugate entangled pairs when aligned to the standard 200 GHz ITU grid. In this work, three frequency-conjugate entangled pairs are used to demonstrate quantum key distribution, with the wavelength-selective switching done manually. The entangled pairs are delivered over 40 km of actual fiber, and an estimated secure key rate of up to 20 bits/s per bi-party is obtained.

This record has no associated files available for download.

Contributors

Download statistics