Toward A Reconfigurable Quantum Network Enabled by a Broadband Entangled Source
arXiv:1506.03896 · 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.
10 pages, 5 figures
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- Asymmetric Protocols for Scalable High-Rate Measurement-Device-Independent Quantum Key Distribution Networks
- A scalable network for simultaneous pairwise quantum key distribution via entanglement-based time-bin coding
- Experimental wavelength-multiplexed entanglement-based quantum cryptography
- Broadband Fiber-based Entangled Photon Pair Source at Telecom O-band
- Efficient experimental quantum fingerprinting with wavelength division multiplexing
- Fully connected entanglement-based quantum communication network without trusted node