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Underwater optical wireless communications : depth dependent variations in attenuation

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Johnson, Laura J., Green, Roger and Leeson, Mark S. (2013) Underwater optical wireless communications : depth dependent variations in attenuation. Applied Optics, Volume 52 (Number 33). pp. 7867-7873. doi:10.1364/AO.52.007867 ISSN 0003-6935.

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Official URL: http://dx.doi.org/10.1364/AO.52.007867

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Abstract

Depth variations in the attenuation coefficient for light in the ocean were calculated using a one-parameter model based on the chlorophyll-a concentration Cc and experimentally-determined Gaussian chlorophyll-depth profiles. The depth profiles were related to surface chlorophyll levels for the range 0–4  mg/m2, representing clear, open ocean. The depth where Cc became negligible was calculated to be shallower for places of high surface chlorophyll; 111.5 m for surface chlorophyll 0.8<Cc<2.2  mg/m3 compared with 415.5 m for surface Cc<0.04  mg/m3. Below this depth is the absolute minimum attenuation for underwater ocean communication links, calculated to be 0.0092  m−1 at a wavelength of 430 nm. By combining this with satellite surface-chlorophyll data, it is possible to quantify the attenuation between any two locations in the ocean, with applications for low-noise or secure underwater communications and vertical links from the ocean surface.

Item Type: Journal Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH): Ocean engineering , Optical communications, Wireless communication systems
Journal or Publication Title: Applied Optics
Publisher: Optical Society of America
ISSN: 0003-6935
Official Date: 2013
Dates:
DateEvent
2013Published
Volume: Volume 52
Number: Number 33
Page Range: pp. 7867-7873
DOI: 10.1364/AO.52.007867
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 23 November 2016
Date of first compliant Open Access: 23 November 2016
Funder: Engineering and Physical Sciences Research Council (EPSRC), Thales (Firm)

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