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Proceedings Paper

Blue-light digital communication in underwater environments utilizing orbital angular momentum
Author(s): Joshua Baghdady; Keith Miller; Sean Osler; Kaitlyn Morgan; Wenzhe Li; Eric Johnson; Brandon Cochenour
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Paper Abstract

Underwater optical communication has recently become the topic of much investigation as the demands for underwater data transmission have rapidly grown in recent years. The need for reliable, high-speed, secure underwater communication has turned increasingly to blue-light optical solutions. The blue-green visible wavelength window provides an attractive solution to the problem of underwater data transmission thanks to its low attenuation, where traditional RF solutions used in free-space communications collapse. Beginning with GaN laser diodes as the optical source, this work explores the encoding and transmission of digital data across underwater environments of varying turbidities. Given the challenges present in an underwater environment, such as the mechanical and optical turbulences that make proper alignment difficult to maintain, it is desirable to achieve extremely high data rates in order to allow the time window of alignment between the transmitter and receiver to be as small as possible. In this paper, work is done to increase underwater data rates through the use of orbital angular momentum. Results are shown for a range of data rates across a variety of channel types ranging in turbidity from that of a clear ocean to a dirty harbor.

Paper Details

Date Published: 17 May 2016
PDF: 8 pages
Proc. SPIE 9827, Ocean Sensing and Monitoring VIII, 98270G (17 May 2016); doi: 10.1117/12.2229796
Show Author Affiliations
Joshua Baghdady, Clemson Univ. (United States)
Keith Miller, Clemson Univ. (United States)
Sean Osler, Clemson Univ. (United States)
Kaitlyn Morgan, Clemson Univ. (United States)
Wenzhe Li, Clemson Univ. (United States)
Eric Johnson, Clemson Univ. (United States)
Brandon Cochenour, Naval Air Warfare Ctr. Aircraft Div. (United States)

Published in SPIE Proceedings Vol. 9827:
Ocean Sensing and Monitoring VIII
Weilin W. Hou; Robert A. Arnone, Editor(s)

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