The Tree of Light as interstellar optical transmitter system
Elisa Bazzani, Anna Valeria Guglielmi, Roberto Corvaja, Nicola, Laurenti, Filippo Romanato, Gianluca Ruffato, Andrea Vogliardi, Francesco, Vedovato, Giuseppe Vallone, Lorenzo Vangelista, Paolo Villoresi

TL;DR
This paper investigates an innovative interstellar optical communication system using a 'Tree-of-light' architecture, optimizing signal emission and distribution on a lightweight sail for efficient data transmission across space.
Contribution
It introduces a novel 'Tree-of-light' system model for interstellar communication, detailing the optical emission scheme and analyzing diffraction effects for improved signal transmission.
Findings
Optimal emission scheme for lightweight sails identified
Pulse position modulation (PPM) performance assessed
Channel coding schemes proposed for enhanced communication
Abstract
This work aims at investigating the optical transmission system needed for such lightweight sail, taking into account the physical constraints of such unprecedented link and focusing on the optimal scheme for the optical signal emission. In particular, the optical signal is distributed to several emitters on the sail. The light diffraction resulting from the pattern of the emitters acting coherently determines the characteristics of the whole beam transmitted by the sail and of the received signal on the Earth. The performance of the digital communication system using pulse position modulation (PPM) can be assessed and channel coding schemes are proposed. We are using the paradigm for which the entire sail communication system is described as a Tree-of-light: the detectors, CPU, memory and laser transmitter are the central unit, representing the trunk of the tree. The branches of the…
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Taxonomy
TopicsAstro and Planetary Science · History and Developments in Astronomy
