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Article overview
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Long distance co-propagation of quantum key distribution and terabit classical optical data channels | | Liu-Jun Wang
; Kai-Heng Zou
; Wei Sun
; Yingqiu Mao
; Yi-Xiao Zhu
; Hua-Lei Yin
; Qing Chen
; Yong Zhao
; Fan Zhang
; Teng-Yun Chen
; Jian-Wei Pan
; | | Date: |
14 Oct 2016 | | Abstract: | Quantum key distribution (QKD) generates symmetric keys between two remote
parties, and guarantees the keys not accessible to any third party. Wavelength
division multiplexing (WDM) between QKD and classical optical communications by
sharing the existing fibre optics infrastructure is highly desired in order to
reduce the cost of QKD applications. However, quantum signals are extremely
weak and thus easily affected by the spontaneous Raman scattering effect from
intensive classical light. Here, by means of wavelength selecting and spectral
and temporal filtering, we realize the multiplexing and long distance
co-propagation of QKD and Terabit classical coherent optical communication
system up to 80km. The data capacity is two orders of magnitude larger than the
previous results. Our demonstration verifies the feasibility of QKD and
classical communication to share the resources of backbone fibre links, and
thus taking the utility of QKD a great step forward. | | Source: | arXiv, 1610.4475 | | Services: | Forum | Review | PDF | Favorites | |
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