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Proceedings Paper

Improving the efficiency of undersea laser communications
Author(s): H. Hemmati; A. Biswas
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Paper Abstract

A preliminary evaluation of under-water data-rates achievable assuming near Poisson channel capacity achieving codes with pulse-position modulation and photon counting shows that to achieve 10’s to 100’s bits per second at a distance of 1 km requires 1-2m diameter collection areas with conventional blue laser transmitters and photomultiplier tubes. At distance of 200 m the data-rates increase to 6 Mb/s. A simple model is presented to show the rapid decrease in irradiance as a function of range in different types of deep-sea water where additive background noise can be neglected.

Paper Details

Date Published: 6 March 2014
PDF: 7 pages
Proc. SPIE 8971, Free-Space Laser Communication and Atmospheric Propagation XXVI, 89710I (6 March 2014); doi: 10.1117/12.2042254
Show Author Affiliations
H. Hemmati, Jet Propulsion Lab. (United States)
A. Biswas, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 8971:
Free-Space Laser Communication and Atmospheric Propagation XXVI
Hamid Hemmati; Don M. Boroson, Editor(s)

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