Tanaka, A.
, Fujiwara, M.
, Nam, S.
, Nambu, Y.
, Takahashi, S.
, Maeda, W.
, Yoshino, K.
, Miki, S.
, Baek, B.
, Wang, Z.
, Tajima, A.
, Sasaki, M.
and Tomita, A.
(2008),
Ultra fast quantum key distribution over a 97-km installed telecom fiber with wavelength-division-multiplexing clock synchronization, Optics Express, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=33012
(Accessed October 17, 2025)
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Ultra fast quantum key distribution over a 97-km installed telecom fiber with wavelength-division-multiplexing clock synchronization
Published
Author(s)
Akihiro Tanaka, Mikio Fujiwara, , Yoshihiro Nambu, Seigo Takahashi, Wakako Maeda, Ken-ichiro Yoshino, Shigehito Miki, , Z. Wang, Akio Tajima, Masahide Sasaki, Akihisa Tomita
Abstract
We demonstrated ultra fast BB84 quantum key distribution (QKD) transmission at 625 MHz clock rate through a 97 km field-installed fiber using practical clock synchronization based on wavelength-division-multiplexing (WDM). We succeeded in over-one-hour stable key generation at high sifted key rate of 2.4 kbps and a low quantum bit error ratio (QBER) of 2.9%. The asymptotic secure key rate was estimated to be 0.78-0.82 kbps from the transmission data with decoy method of average photon numbers 0, 0.15, and 0.4 photons/pulse.Citation
Optics Express
Volume
16
Issue
15
Pub Type
Journals
Download Paper
Keywords
quantum key distribution, decoy states, BB84, superconducting detectors, sspd
Citation
Issues
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Created July 20, 2008, Updated October 12, 2021