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Proceedings Paper

High speed optical interrogator calibration technique
Author(s): David S. George; Stephen Hill; Robert I. Howden; Graham W. Smith
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Paper Abstract

We present a novel technique for the calibration of a high speed FBG interrogation system which incorporates an Arrayed Waveguide Grating (AWG). It uses temperature tuning to wavelength sweep the AWG to generate calibration data and to determine the optimum temperature of AWG for the actual test. For ideal operation the FBG wavelengths under zero stimulus would lie midway between the International Telecommunications Union (ITU) grid wavelengths of the AWG. The attached FBG wavelengths cannot always be accurately prescribed since they vary during attachment, and with temperature. This technique reduces this constraint and enables different detector gains to be used on different channels for system optimisation.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75031W (5 October 2009); doi: 10.1117/12.835967
Show Author Affiliations
David S. George, AWE Aldermaston (United Kingdom)
Stephen Hill, AWE Aldermaston (United Kingdom)
Robert I. Howden, AWE Aldermaston (United Kingdom)
Graham W. Smith, AWE Aldermaston (United Kingdom)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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