Diffuse high-bandwidth optical communications

Pontbriand, C.; Farr, Norm; Ware, Jonathan D.; Preisig, James C.; Popenoe, Hugh

doi:10.1109/oceans.2008.5151977

Cited by 85 publications

(34 citation statements)

References 5 publications

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“…The current noise at a given frequency is computed as (25) An additional source of noise is Johnson-Nyquist noise originating from the feedback resistor . At a frequency and temperature in Kelvin, this noise is equal to (26) where 1.38 10 J/K is the Boltzmann constant.…”

Section: F Detector Angular Sensitivitymentioning

confidence: 99%

An End-to-End Signal Strength Model for Underwater Optical Communications

Doniec

Angermann²,

Rus

2013

IEEE J. Oceanic Eng.

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In this paper, we present a generic model of signal strength in underwater optical communications. The model includes light sources, detectors, amplifier and detector circuitry, optics, as well as a simple extinction model of the water channel. The end-to-end model provides insights into optimization approaches for underwater optical modems and enables relative pose estimation between underwater optical transmitters and receivers. We instantiate our model to the AquaOptical model by determining its parameters and verifying the model prediction in a suite of pool experiments.Index Terms-Channel models, modeling, modem architecture, simulation and validation of point-to-point communications, software-defined modems, underwater optical communications.

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Section: F Detector Angular Sensitivitymentioning

confidence: 99%

An End-to-End Signal Strength Model for Underwater Optical Communications

Doniec

Angermann²,

Rus

2013

IEEE J. Oceanic Eng.

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“…Recent research has shown this technology to be capable of supporting links with up to 5 Mbps for 200 m in deep oceans [1]. A problem with this study, and a number of similar studies [2][3][4], is the lack of clarity about if and how the attenuation of light is changed throughout the communication link.…”

Section: Introductionmentioning

confidence: 93%

“…Haltrin determined a one-parameter model for attenuation that simplifies equations (3) and (5) by finding the relationship between the concentrations of different particulates [1]. These concentrations were determined numerically in terms of the chlorophyll concentration to be:…”

Section: B One-parameter Attenuation Modelmentioning

confidence: 99%

Underwater optical wireless communications: depth dependent variations in attenuation

2013

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Depth variations in the attenuation coefficient for light in the ocean were calculated using a one-parameter model based on the chlorophyll-a concentration C c and experimentally-determined Gaussian chlorophylldepth profiles. The depth profiles were related to surface chlorophyll levels for the range 0-4 mg∕m 2 , representing clear, open ocean. The depth where C c became negligible was calculated to be shallower for places of high surface chlorophyll; 111.5 m for surface chlorophyll 0.8 < C c < 2.2 mg∕m 3 compared with 415.5 m for surface C c < 0.04 mg∕m 3 . 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.

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“…However, for the NLOS link, a 50-fold increase in transmit power is necessary to achieve the same data rates at similar range due to broader transmit beams. In 2008, they achieved transmission, at a distance of 200m for a data rate of 5Mbps, and in 2010, at a distance of 108m for a data rate of 10Mbps [46,47].…”

Section: Research On Uowc Systemsmentioning

confidence: 99%

Underwater Optical Wireless Communication Systems: A Concise Review

Gkoura¹,

Roumelas²,

Nistazakis³

et al. 2017

Turbulence Modelling Approaches - Current State, Development Prospects, Applications

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Underwater optical wireless communications (UOWC) have gained a considerable interest during the last years as an alternative means for broadband inexpensive submarine communications. UOWC present numerous similarities compared to free space optical (FSO) communications or laser satellite links mainly due to the fact that they employ optical wavelengths to transfer secure information between dedicated point-to-point links. By using suitable wavelengths, high data rates can be attained. Some recent works showed that broadband links can be achieved over moderate ranges. Transmissions of several Mbps have been realized in laboratory experiments by employing a simulated aquatic medium with scattering characteristics similar to oceanic waters. It was also demonstrated that UOWC networks are feasible to operate at high data rates for medium distances up to a hundred meters. However, it is not currently available as an industrial product and mainly test-bed measurements in water test tanks have been reported so far. Therefore, extensive research is expected in the near future, which is necessary in order to further reveal the "hidden" abilities of optical spectrum to transfer broadband signals at higher distances. The present work summarizes the recent advances in channel modeling and system analysis and design in the area of UOWC.

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Diffuse high-bandwidth optical communications

Cited by 85 publications

References 5 publications

An End-to-End Signal Strength Model for Underwater Optical Communications

An End-to-End Signal Strength Model for Underwater Optical Communications

Underwater optical wireless communications: depth dependent variations in attenuation

Underwater Optical Wireless Communication Systems: A Concise Review

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