QCalc: a tool to compute classical and quantum communication rates over free-space optical channels

Davide Orsucci; Jorge Rosano Nonay; Amita Shrestha; Florian Moll

doi:10.1117/12.2600016

12 September 2021 QCalc: a tool to compute classical and quantum communication rates over free-space optical channels

Davide Orsucci, Jorge Rosano Nonay, Amita Shrestha, Florian Moll

Proceedings Volume 11868, Emerging Imaging and Sensing Technologies for Security and Defence VI; 118680F (2021) https://doi.org/10.1117/12.2600016
Event: SPIE Security + Defence, 2021, Online Only

Abstract

Free-Space Optical (FSO) communication is a technology that enables ultra-high-rate data exchange and will be crucial in enabling secure Quantum Key Distribution (QKD) over long distances. However, FSO communication systems are comparatively complex technologies, comprising a variety of subsystems that all have to work together in a coordinated way. Hence, assessing the feasibility of establishing a (classical or quantum) link in a given communication scenario is a difficult task in itself. Here we introduce QCalc, a software tool that aims at easing and streamlining this process, allowing the user to keep track of all the relevant parameters in a link budget. This software computes the total transmissivity, and thus, the signal intensity observed at the receiver for any given parameters of the transceivers and the FSO communication channel. The estimated signal intensity can then be used to compute either the link budget in a classical communication scenario or the secure key rate of a QKD protocol.

Conference Presentation

Citation Download Citation

Davide Orsucci, Jorge Rosano Nonay, Amita Shrestha, and Florian Moll "QCalc: a tool to compute classical and quantum communication rates over free-space optical channels", Proc. SPIE 11868, Emerging Imaging and Sensing Technologies for Security and Defence VI, 118680F (12 September 2021); https://doi.org/10.1117/12.2600016

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