Hyperspectral laser imaging of underwater targets

Darwiesh, M.; El-Sherif, Ashraf F.; Ayoub, H. S.; El-Sharkawy, Yasser H.; Hassan, Mohamed M.; Elbashar, Y. H.

doi:10.1007/s12596-018-0493-7

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…Generally, to describe the propagation in water of collimated light in low scattering regimes, the spectral beam attenuation coefficient c(λ) is used; this parameter is wavelength function. This coefficient is a sum of the effects of the absorption coefficient and of the scattering one, respectively called a(λ) and b(λ), and so defined as [50][51][52]:…”

Section: Optical Transmission In the Aquatic Mediummentioning

confidence: 99%

“…In underwater optical communication, the connection between transmitter and receiver can be of two main types (see Figure 5) [20,51] For UOWC systems, the function of the transmitter is to transform the electrical signal in optical one, projecting the carefully aimed light pulses into the water. The optical light sources are based on LED or LD one [94][95][96][97][98][99][100][101][102].…”

Section: The Transmitter (Tx)mentioning

confidence: 99%

“…In underwater optical communication, the connection between transmitter and receiver can be of two main types (see Figure 5) [20,51]: (a) diffuse line-of-sight (diffuse LOS) configuration; (b) pointto-point line-of-sight (LOS) configuration. Diffused LOS configurations use diffused light sources, such as high-power, highly efficient LEDs.…”

Section: The Transmitter (Tx)mentioning

confidence: 99%

“…[20,51]: (a) diffuse line-of-sight (diffuse LOS) configuration; (b) pointto-point line-of-sight (LOS) configuration.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Underwater Optical Wireless Communications: Overview

Spagnolo

Cozzella

Leccese

2020

Sensors

187

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Underwater Optical Wireless Communication (UOWC) is not a new idea, but it has recently attracted renewed interest since seawater presents a reduced absorption window for blue-green light. Due to its higher bandwidth, underwater optical wireless communications can support higher data rates at low latency levels compared to acoustic and RF counterparts. The paper is aimed at those who want to undertake studies on UOWC. It offers an overview on the current technologies and those potentially available soon. Particular attention has been given to offering a recent bibliography, especially on the use of single-photon receivers.

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Section: Optical Transmission In the Aquatic Mediummentioning

confidence: 99%

Section: The Transmitter (Tx)mentioning

confidence: 99%

Section: The Transmitter (Tx)mentioning

confidence: 99%

“…[20,51]: (a) diffuse line-of-sight (diffuse LOS) configuration; (b) pointto-point line-of-sight (LOS) configuration.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Underwater Optical Wireless Communications: Overview

Spagnolo

Cozzella

Leccese

2020

Sensors

187

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“…The surveillance station can be powered by nuclear batteries [29] and in real time control, through digital optical correlation [30]- [32], if something intrudes into the monitored area. In case of suspect object (e.g., a submarine) the image and related alert is sent back to the buoy and, from it, to the ground costal station via satellite link.…”

mentioning

confidence: 99%

State-of-the art and perspectives of underwater optical wireless communications

Leccese

Spagnolo

2021

ACTA IMEKO

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In scientific, military, and industrial sectors, the development of robust and efficient submarine wireless communication links is of enormous interest. Underwater wireless communications can be carried out through acoustic, radio frequency (RF), and optical waves. Underwater optical communication is not a new idea, but it has recently been considered because seawater exhibits a window of reduced absorption both in the visible spectrum and long-wavelength UV light (UV-A). Compared to its bandwidth limited acoustic counterpart, underwater optical wireless communications (UOWCs) can support higher data rates at low latency levels. Underwater wireless communication networks are important in ocean exploration, military tactical operations, environmental and water pollution monitoring. Anyway, given the rapid development of UOWC technology, documents are still needed showing the state of the art and the progress made by the most current research. This paper aims to examine current technologies, and those potentially available soon, for Underwater Optical Wireless Communication and to propose a new perspective using UV-A radiation.

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