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Underwater optical wireless communications : depth-dependent beam refraction
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Johnson, Laura J., Green, Roger and Leeson, Mark S. (2014) Underwater optical wireless communications : depth-dependent beam refraction. Applied Optics, 53 (31). pp. 7273-7277. doi:10.1364/AO.53.007273 ISSN 0003-6935.
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Official URL: http://dx.doi.org/10.1364/AO.53.007273
Abstract
Global refractive gradients in seawater cause pointing problems for optical wireless communications. A refractive index depth profile of the Pacific Ocean was calculated from measured salinity, temperature, and pressure, determining the end points of a refracted and nonrefracted 200 m communication link. Numerical ray tracing was used with a point source for angles between 10° and 80° and transmission wavelengths of 500–650 nm; the maximum end-point difference found was 0.23 m. A 500 nm laser with a 0.57° full-angle FOV was traced; the nonrefracted receiver location was outside the FOV for all links angled >15° to the vertical. However, most pointing issues underwater are unlikely to be significant with suitable FOV choice and natural scattering of the source.
Item Type: | Journal Article | ||||||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||
Library of Congress Subject Headings (LCSH): | Optical communications, Underwater acoustic telemetry, Wireless communication systems | ||||||||||
Journal or Publication Title: | Applied Optics | ||||||||||
Publisher: | Optical Society of America | ||||||||||
ISSN: | 0003-6935 | ||||||||||
Official Date: | 1 November 2014 | ||||||||||
Dates: |
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Volume: | 53 | ||||||||||
Number: | 31 | ||||||||||
Number of Pages: | 5 | ||||||||||
Page Range: | pp. 7273-7277 | ||||||||||
DOI: | 10.1364/AO.53.007273 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Adapted As: |
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