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5 October 2009 High speed optical interrogator calibration technique
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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75031W (2009)
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom
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.
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David S. George, Stephen Hill, Robert I. Howden, and Graham W. Smith "High speed optical interrogator calibration technique", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75031W (5 October 2009);

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