9 February 2007 Progress toward quantum communications networks: opportunities and challenges
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Quantum communications is fast becoming an important component of many applications in quantum information science. Sharing quantum information over a distance among geographically separated nodes using photonic qubits requires a reconfigurable transparent networking infrastructure that can support quantum information services. Using quantum key distribution (QKD) as an example of a quantum communications service, we investigate the ability of fiber networks to support both conventional optical traffic and single-photon quantum communications signals on a shared infrastructure. The effect of Raman scattering from conventional channels on the quantum bit error rate (QBER) of a QKD system is analyzed. Additionally, the potential impact and mitigation strategies of other transmission impairments such as four-wave mixing, cross-phase modulation, and noise from mid-span optical amplifiers are discussed. We also review recent trends toward the development of automated and integrated QKD systems which are important steps toward reliable and manufacturable quantum communications systems.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert J. Runser, Thomas Chapuran, Paul Toliver, Nicholas A. Peters, Matthew S. Goodman, Jon T. Kosloski, Nnake Nweke, Scott R. McNown, Richard J. Hughes, Danna Rosenberg, Charles G. Peterson, Kevin P. McCabe, Jane E. Nordholt, Kush Tyagi, Philip A. Hiskett, Nicholas Dallmann, "Progress toward quantum communications networks: opportunities and challenges", Proc. SPIE 6476, Optoelectronic Integrated Circuits IX, 64760I (9 February 2007); doi: 10.1117/12.708669; https://doi.org/10.1117/12.708669

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