2015/06/30 by E. Y. Zhu, Eric Y. Zhu, C. Corbari +8
Computer Science · Physics and Astronomy · #Bandwidth (computing) #Broadband #Computer science #Electrical engineering #Multiplexing #Optics #Optoelectronics #Photon #Photon entanglement #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum key distribution #Quantum mechanics #Quantum network #Quantum optics and atomic interactions #Telecommunications #Topology (electrical circuits) #quant-ph
paper · pdf · doi:10.1364/josab.36.0000b1
published as J. Opt. Soc. Am. B 36, B1-B6 (2019) · 10 pages, 5 figures
openalex publication_date 2018/12/20 · openalex created_date 2018/12/22 · arxiv created 2019/01/17 · arxiv updated 2019/01/18 · openalex updated_date 2026/08/05
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.