QKD system with link redundancy
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United States of America Patent
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Issued Date -
Jul 24, 2008
app pub date -
Jan 16, 2008
filing date -
Jan 18, 2007
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Abandoned
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Abstract
A QKD system having QKD link redundancy between two sites, with the system having only one QKD station at each site, and with two or more QKD links operably coupled to the QKD stations. The QKD stations have respective optical switches that are optically coupled to both QKD links and that are controlled by respective controllers in each of the QKD stations. If one of the QKD links fails or has trouble transmitting optical signals, the QKD switches are switched so that the optical path between the QKD stations uses the remaining QKD link. This arrangement requires only two QKD stations rather than the four QKD stations as presently taught in the prior art.
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