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Raman amplification in an optically high-powered data link dedicated to a 10 km long extension for submarine cabled observatories ArchiMer
Audo, F.; Perhirin, Steven; Quintard, V.; Guegan, Matthieu; Perennou, A.; Auffret, Yves.
We describe a quasi-all-optical extension dedicated to simplifying the deployment of submarine cabled observatories. Based on power-over-fiber technologies, high power supply and data are both transmitted in one optical fiber of a few kilometers in length. We study the Raman amplification on the down-and up-stream data in the static regime with the high optical power varying from 100 mW to 4 W over a 10 km long single-mode optical fiber. We focus on the data optical budget and signal to noise ratio dependence with respect to the high optical power value and the data optical wavelength. We also present the transmission quality in the dynamic regime of this quasi-all-optical extension.
Tipo: Text Palavras-chave: Optical fiber network; Optical power supply; Power-over-fiber; Raman scattering; Optical communication.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00146/25707/24035.pdf
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Sedimentological imprint on subseafloor microbial communities in Western Mediterranean Sea Quaternary sediments ArchiMer
Ciobanu, Maria Cristina; Rabineau, Marina; Droz, Laurence; Revillon, Sidonie; Ghiglione, J. -f.; Dennielou, Bernard; Jorry, Stephan; Kallmeyer, J.; Etoubleau, Joel; Pignet, Patricia; Crassous, Philippe; Vandenabeele-trambouze, Odile; Laugier, J.; Guegan, Matthieu; Godfroy, Anne; Alain, Karine.
An interdisciplinary study was conducted to evaluate the relationship between geological and paleoenvironmental parameters and the bacterial and archaeal community structure of two contrasting subseafloor sites in the Western Mediterranean Sea (Ligurian Sea and Gulf of Lion). Both depositional environments in this area are well-documented from paleoclimatic and paleooceanographic point of views. Available data sets allowed us to calibrate the investigated cores with reference and dated cores previously collected in the same area, and notably correlated to Quaternary climate variations. DNA-based fingerprints showed that the archaeal diversity was composed by one group, Miscellaneous Crenarchaeotic Group (MCG), within the Gulf of Lion sediments and of nine...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00090/20171/17826.pdf
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