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1. Techniques for measuring/demultiplexing spectral information from Bragg gratings
To obtain the measurements associated with each of the transducer arrays, or Bragg grating sensors, chained/multiplexed on one or more measurement lines, we need firstly to identify each sensor (its spectral address) and secondly to precisely measure its wavelength (the measurement information). These are the two main roles played by measuring instruments/systems, also known as "readout" systems, which, with rare exceptions, can* interrogate Bragg sensors, whatever their conditioning or the measurand they address, since optically only Bragg filters (transducers) are "seen" by these analysis systems.
* commercial instruments are almost exclusively dedicated to the analysis of Bragg lines in short-pitch, uniform and straight gratings.
In the past, several publications reviewed these techniques...
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Techniques for measuring/demultiplexing spectral information from Bragg gratings
Main fields of application
Bibliography
Quoted projects
– European projects :
CATIEMON (CatenaryInterfaceMonitoring Coherent sensing technology for electrical railway infrastructure and rolling stock for interoperable cross boundary transportation). Specific Targeted Project TST4-CT-2005-12105. Ref : 012105. Leader: Siemens AG [Germany]. Partners: BLS AG [Switzerland], Morganite Ltd [Great Britain], Furrer+Frey AG [Switzerland], Cybernetics [France],...
Data on the industrial context and its evolution
Since the early 90s, a number of players, mainly private companies, involved on the supply side in Bragg technologies have emerged, developing their activities and products.
It's worth noting, however, that several of the companies featured in the first edition of the Techniques de l'Ingénieur
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