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| Khalighi, Mohammad-ali; Chadi, Gabriel; Hamza, Tasnim; Bourennane, Salah; Leon, Pierre; Rigaud, Vincent. |
| Because of its ability of providing very high data transmission rates over distances up to several tens of meters, underwater wireless optical communication (UWOC) has attracted considerable interest during the past few years. The underwater channel is a challenging environment, especially because of its high attenuation. The difficulty of precise localization underwater also leads to unavoidable link misalignments that can have an important impact on the link availability and otherwise on the quality of signal transmission. In this paper, after a review of the recent research works on UWOC and the available commercialized systems, we present the performance study of a typical UWOC system under some simplifying assumptions for system modeling. We also... |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00226/33701/32093.pdf |
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| Khalighi, Mohammad-ali; Hamza, Tasnim; Bourennane, Salah; Leon, Pierre; Opderbecke, Jan. |
| We study the use of Silicon photo-multipliers (SiPMs) for underwater wireless optical communications (UWOC) and discuss their main interests and drawbacks, compared with photo-multiplier tubes. This comparison is mainly based on practical considerations regarding system implementation and the attainable link span. Presenting an appropriate model for signal attenuation in water and considering the simple On-Off keying modulation, we bring clearance on the real interest of using an SiPM in the UWOC context. We also elucidate the main drawbacks of these components in practice, in particular, regarding the limitation on the transmission data rate, as well as the nonlinear distortion caused on the received signal in relatively short ranges, where the signal... |
| Tipo: Text |
Palavras-chave: Underwater wireless optical communications; Silicon photo-multiplier; Singlephoton avalanche diode; Photo-multiplier tube; Underwater optical channel. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00396/50726/51434.pdf |
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| Hamza, Tasnim; Khalighi, Mohammad-ali; Bourennane, Salah; Leon, Pierre; Opderbecke, Jan. |
| We investigate the effect of environmental noise, caused by solar radiations under water, on the performance of underwater wireless optical communication (UWOC) systems. Presenting an analytical and generic model for this noise, we examine its impact on the link performance in terms of the bit error rate (BER). This study is conducted for different photo-detector types in the aim of highlighting practical limitations of establishing UWOC links in the presence of subsea solar noise. We show how the solar noise can impact the performance of UWOC links for relatively low operation depths. The results we present provide valuable insight for the design of UWOC links, which are likely to be established at relatively low depths. They can be exploited not only for... |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00362/47272/47234.pdf |
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| Leon, Pierre; Roland, Francois; Brignone, Lorenzo; Opderbecke, Jan; Greer, Jennifer; Khalighi, M. A.; Hamza, Tasnim; Bourennane, S.; Bigand, M.. |
| Silicon Photomultipliers (SiPMs) have recently been recognized as an interesting alternative to photomultiplier tubes (PMTs) thanks to their high sensitivity and time resolution. They can closely approach quantum-limited sensitivity in the detection of weak optical signals. Ifremer (French Research Institute for Exploitation of the Sea) and Institut Fresnel research lab have been investigating appropriate alternative solutions for PMTs in the context of underwater optical communications, and have for the first time used these new photodetector components for signal detection. A novel prototype of an optical modem based on SiPM receivers was realized with support from Osean SAS Co., a French instrumentation company. A number of lab experiments and sea... |
| Tipo: Text |
Palavras-chave: Optical communications; Underwater communications; Silicon photomultipliers; Photomultiplier tubes. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00435/54677/56495.pdf |
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