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Despite recent progress, optical fibre transmission systems remain primitive in comparison with, say, microwaves. This general overview of optical fibre and optoelectronics development looks to the future when the full potential of the medium has been developed.In the early days of research on optical fibres it was convenient to consider light propagation in terms of rays reflecting from the interface between the core and cladding. In this way analysis was simplified and many of the results o...

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Maeder , D.; Ryser , P.; Sanderson , B.; Sillou , A.; Steiner , A. (1983)
Le cyclage thermique dans une petite plage de température du domaine de transformation permet d'étudier les émissions acoustiques (EA) produites par des transformations partielles de l'échantillon. Les taux de comptage d'EA dépendent de l'amplitude des cycles thermiques, de la température moyenne et du sens de variation de la température ([MATH]). L'étude des résultats permet de supposer que la production d'EA est liée à la disparition des interfaces β-martensite pour [MATH] > 0 et à celle de...

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