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A single-photon counter for long-haul telecom

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7 Author(s)
Karlsson, Anders ; Dept. of Electron., R. Inst. of Technol., Stockholm, Sweden ; Bourennane, M. ; Ribordy, G. ; Zbinden, H.
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Quite a few groups have turned their attention to using commercially available InGaAs/InP APDs, originally developed for optical communication applications, as SPADs for photon counting at 1300 nm and 1550 nm. This research has turned out to be quite fruitful, and there are many applications emerging in optical metrology (optical time-domain reflectometry) in eye-safe range finding and in future quantum technologies, where databits are encoded on individual photons. This article describes the status of these commercially available InGaAs/InP APDs used as single-photon counters in the telecom wavelength region of 1550 nm

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Circuits and Devices Magazine, IEEE  (Volume:15 ,  Issue: 6 )