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4. Glossary
Blaze angle
Orientation of the index periodic fluctuation with respect to the fiber's cross-sectional plane, in the case of an inclined Bragg grating.
Spectral attenuation
Characterizes signal attenuation during propagation (Beer-Lambert law). It is expressed per unit fiber length at a given wavelength, e.g. 0.2 dB/km at 1.55 µm. The transmission of silica fibers is limited by Rayleigh scattering (law in 1/λ 4 ) from UV to near IR, and by IR absorption beyond.
Sensor
A device designed to perform a specific measurement. There are different types, depending on the technology used and the quantity (measurand) they address. Every sensor contains a transducer.
CFO, Fiber optic sensor
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Bibliography
Quoted projects
European project COSMUS (Real-Time Modelling and Compensation Of Soil Movements on Underground Sites). Ref: BRPR960235; Leader: Solétanche-Bachi [France]. Partners: CEA (France), Glötzl (Germany), EPFL-LC (Switzerland), Tractebel (Belgium) and Cambridge Univ. (England).
Optical Transducer Systems. Danish project funded by the Danish National Advanced Technology Foundation. Partners: Brüel &...
Directory
Manufacturers – Suppliers – Distributors
The main players are listed in Table A.
Statistical and economic data
In the 90s, the players involved in manufacturing technologies and in understanding the physical phenomena underlying photo-inscription were either academics and research centers, large telecoms manufacturers, or small SMEs who had sensed an emerging need. These small private players enabled a large number of users to purchase and test this innovative technology. Then, as is often the case, some SMEs were...
Websites
To find out more about European projects, visit the Commission's website at http://www.cordis.europa.eu or go directly to the database of past projects: http://cordis.europa.eu/search/simple_fr.
To find out more about the projects...
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