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Determination of the Radial Distribution of Attenuation in Single-Mode Optical Fibers

光学学报 2003年第S1期23卷 51-52页

作者： S. Girard I.Trenteseaux y. ouerdane J-P Meunier A. Boukenter J-L. Derep L.Thonnérieux 1 University.Jean Monnet Laboratoire TSI UMR CNRS 551623 rue du Dr Paul Michelon 42023 Saint-Etienne France2 SAGEM S.A. 72 - 74 rue de la Tour Billy 95101 Argenteuil France.1 University Jean Monnet Laboratoire TSI UMR CNRS 551623 rue du Dr Paul Michelon 42023 Saint-Etienne France1 University Jean Monnet Laboratoire TSI UMR CNRS 551623 rue du Dr Paul Michelon 42023 Saint-Etienne France1 University Jean Monnet Laboratoire TSI UMR CNRS 551623 rue du Dr Paul Michelon 42023 Saint-Etienne France1 University Jean Monnet Laboratoire TSI UMR CNRS 551623 rue du Dr Paul Michelon 42023 Saint-Etienne France3 Centre Technique d'Arcueil (DGA/DCE/CTA) 16 bis avenue du Prieur de la C6te d'Or 94114 Arcueil France.2 SAGEM S.A. 72 - 74 rue de la Tour Billy 95101 Argenteuil France.

A new method to determine the radial distribution of attenuation in single-mode optical fibers is proposed. As an example, radiation-induced losses in gamma-irradiated germanosilicate fibers are characterized at 633 nm.

关键词： of on in Determination of the Radial Distribution of Attenuation in Single-Mode Optical Fibers have mode been

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Parameters for Cold Collisions of Lithium and Caesium Atoms

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Chinese Phy.ics Letters 2011年第6期28卷 56-58页

作者： Jamieson M.J ouerdane H School of Computing Science University of GlasgowGlasgow G128QQUK Mediterranean Institute of Fundamental Phy.ics Via Appia Nuova 3100040 MarinoRomeItaly CNRT Matériaux UMS CNRS 3318 6 Boulevard Maréchal Juin14050 Caen CedexFrance

We calculate the s-wave scattering length and effective range and the p-wave scattering volume for 7Li atoms interacting with 133Cs atoms via the X1Σ+molecular *** length and volume are found by.fitting the log-derivative of the zero energy.wave function evaluated at short range to a long range expression that accounts for the leading van der Waals dispersion potential and then incorporating the remaining long range dispersion contributions to first *** effective range is evaluated from a quadrature *** calculated parameters are checked from the zero energy.limits of the scattering phase *** comment on ill-conditioning in the calculated s-wave scattering length.

关键词： potential dispersion checked

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Investigation by.AES, EELS and TRIM Simulation Method of InP(100) Subjected to He<sup>+</sup>and H<sup>+</sup>Ions Bombardment

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Materials Sciences and Applications 2011年第5期2卷 421-426页

作者： Mohamed Ghaffour Abdellaoui Abdellaoui Abdellah ouerdane M'Hammed Bouslama Christian Jardin 不详

Auger Electron Spectroscopy.(AES) and Electron Energy.Loss Spectroscopy.(EELS) have been performed in order to investigate the InP(100) surface subjected to ions bombardment. The InP(100) surface is alway. contaminated by.carbon and oxy.en revealed by.C-KLL and O-KLL AES spectra recorded just after introduction of the sample in the UHV spectrometer chamber. The usually.cleaning process of the surface is the bombardment by.argon ions. However, even at low energy.of ions beam (300 eV) indium clusters and phosphorus vacancies are usually.formed on the surface. The aim of our study.is to compare the behaviour of the surface when submitted to He+ or H+ ions bombardment. The helium ions accelerated at 500 V voltage and for 45 mn allow removing contaminants but induces damaged and no stoichiometric surface. The proton ions were accelerated at low energy.of 500 eV to bombard the InP surface at room temperature. The proton ions broke the In-P chemical bonds to induce the formation of In metal islands. Such a chemical reactivity.between hy.rogen and phosphorus led to form chemical species such as PH and PH3, which desorbed from the surface. The chemical susceptibly.and the small size of H+ advantaged their diffusion into bulk. Since the experimental methods alone were not able to give us with accuracy.the disturbed depth of the target by.these ions. We associate to the AES and EELS spectroscopies, the TRIM (Transport and Range of Ions in Matter) simulation method in order to show the mechanism of interaction between Ar+, He+ or H+ ions and InP and determine the disturbed depth of the target by.argon, helium or proton ions.

关键词： AES EELS Interaction Ions-Matter Simulation Method TRIM InP

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