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Article

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

1
GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Germany
2
Institute of Coastal Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany
3
Faculty of Engineering, University of Kiel, 24143 Kiel, Germany
*
Author to whom correspondence should be addressed.
Received: 28 September 2018 / Revised: 24 October 2018 / Accepted: 29 October 2018 / Published: 31 October 2018
(This article belongs to the Special Issue Underwater Sensing, Communication, Networking and Systems)
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. View Full-Text
Keywords: underwater optical communication; thin film filters; photodetector; ambient light; shot noise underwater optical communication; thin film filters; photodetector; ambient light; shot noise
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MDPI and ACS Style

Sticklus, J.; Hieronymi, M.; Hoeher, P.A. Effects and Constraints of Optical Filtering on Ambient Light Suppression in LED-Based Underwater Communications. Sensors 2018, 18, 3710. https://0-doi-org.brum.beds.ac.uk/10.3390/s18113710

AMA Style

Sticklus J, Hieronymi M, Hoeher PA. Effects and Constraints of Optical Filtering on Ambient Light Suppression in LED-Based Underwater Communications. Sensors. 2018; 18(11):3710. https://0-doi-org.brum.beds.ac.uk/10.3390/s18113710

Chicago/Turabian Style

Sticklus, Jan, Martin Hieronymi, and Peter A. Hoeher 2018. "Effects and Constraints of Optical Filtering on Ambient Light Suppression in LED-Based Underwater Communications" Sensors 18, no. 11: 3710. https://0-doi-org.brum.beds.ac.uk/10.3390/s18113710

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