Short Range Underwater Optical Communication Links

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dc.contributor.advisor Dr. Leda Lunardi, Committee Member en_US
dc.contributor.advisor Dr. Gianluca Lazzi, Committee Member en_US
dc.contributor.advisor Dr. John F. Muth, Committee Chair en_US Chancey, Mark Alan en_US 2010-04-02T17:56:49Z 2010-04-02T17:56:49Z 2005-10-25 en_US
dc.identifier.other etd-07252005-171301 en_US
dc.description.abstract The future tactical ocean environment will be increasingly complicated. In addition to traditional communication links there will be a proliferation of unmanned vehicles in space, in the air, on the surface, and underwater. To effectively utilize these systems improvements in underwater communication systems are needed. Since radio waves do not propagate in sea water, and acoustic communication systems are relatively low bandwidth the possibility of high speed underwater optical communication systems are considered. In traditional communication systems, constructing a link budget is often relatively straight forward. In the case of underwater optical systems the variations in the optical properties of ocean water lead to interesting problems when considering the feasibility and reliability of underwater optical links. The main focus of this thesis is to understand how to construct an underwater link budget which includes the effects of scattering and absorption of realistic ocean water. The secondary focus of the thesis was to construct LED based optical communication systems. This required understanding the behavior of Gallium Nitride LEDs operated under intense electrical pulsing conditions. An optical FM wireless system was constructed for transmitting speech. An LED based Ethernet compatible digital communications system that was capable of operating at 10 Mbps was also constructed and packaged for underwater operation. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject optical properties of seawater en_US
dc.subject underwater en_US
dc.subject oceanic properties en_US
dc.subject scattering en_US
dc.subject optical en_US
dc.subject absorption en_US
dc.title Short Range Underwater Optical Communication Links en_US MS en_US thesis en_US Electrical Engineering en_US

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