Effects and Constraints of Optical Filtering on Ambient Light Suppression in LED-Based Underwater Communications.

Sticklus, Jan , Hieronymi, Martin and Hoeher, Peter (2018) Effects and Constraints of Optical Filtering on Ambient Light Suppression in LED-Based Underwater Communications. Open Access Sensors, 18 (Article 3710). DOI 10.3390/s18113710.

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Abstract

Optical communication promises to be a high-rate supplement for acoustic communication in short-range underwater applications. In the photic zone of oceanic and coastal waters, underwater optical communication systems are exposed by remaining sunlight. This ambient light generates additional noise in photodetectors, thus degrading system performance. This effect can be diminished by the use of optical filters. This paper investigates light field characteristics of different water types and potential interactions with optical underwater communication. A colored glass and different thin film bandpass filters are examined as filter/detector combinations under varying light and water conditions, and their physical constraints are depicted. This is underlined by various spectral measurements as well as optical signal-to-noise ratio calculations. The importance of matching the characteristics of the light emitting diode (LED) light source, the photodetector, and the filter on the ambient conditions using wider angle of incidents is emphasized.

Document Type: Article
Keywords: underwater optical communication; thin film filters; photodetector; ambient light; shot noise
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-ME Maritime Meteorology
Kiel University
Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS
HZG
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.3390/s18113710
ISSN: 1424-8220
Projects: Future Ocean
Date Deposited: 20 Nov 2018 12:03
Last Modified: 23 Sep 2019 21:23
URI: http://oceanrep.geomar.de/id/eprint/44713

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