29 July 2002 From photosensitive fibers to fiber Bragg grating sensor systems
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Proceedings Volume 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life; (2002); doi: 10.1117/12.484592
Event: Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, 2002, Novosibirsk, Russian Federation
Abstract
Fiber Bragg Gratings (FBGs) as integrated spectral fiber reflection filters have found many applications in the fields of communication and sensing. Different techniques such as the phase mask method or the interferometric method are used for recording of such FBGs with UV-light. Interferometric recording during the fiber drawing process allows the realization of complex FBG-anays in a simple way. Such FBG-arrays are especially interesting for (quasi-) distributed fiber optical sensing systems allowing measurement in parallel at different locations. We will report about improvements in dynamic recording (single pulse recording) of such FBG-arrays achieving high reflection intensities in the range of 10%. This has been achieved by optimised doping and processing of the fiber. Applications of such FBGs for measuring parameters like temperature and strain will be discussed including a specific spectral measuring system based on a grating polychromator for multiplexed measurements.
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Hartmut Bartelt, Stephan Grimm, Volker Hagemann, M. Rothardt, Wolfgang Ecke, Reinhardt Willsch, "From photosensitive fibers to fiber Bragg grating sensor systems", Proc. SPIE 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, (29 July 2002); doi: 10.1117/12.484592; https://doi.org/10.1117/12.484592
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KEYWORDS
Optical fibers

Fiber Bragg gratings

Sensors

Temperature metrology

Interferometry

Refractive index

Multiplexing

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