9 June 2004 Fourier-transform-based spectral measurements on multiplexed fibre Bragg grating arrays
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Proceedings Volume 5502, Second European Workshop on Optical Fibre Sensors; (2004) https://doi.org/10.1117/12.566690
Event: Second European Workshop on Optical Fibre Sensors, 2004, Santander, Spain
Abstract
We demonstrate a Fourier Transform Spectroscopic approach to achieve high-resolution measurement of the structural detail of the reflected spectra from an infrared FBG grating array, with the inherent measurement capability over a wavelength range of 900 nm. Measurements on all gratings in the array are achieved in a single scan of the OPD, from an interferogram captured on a single InGaAs photodiode. We demonstrate the approach for measurements on standard gratings and in the case of a grating subjected to a nonuniform measurand. The OPD is referenced from a visible HeNe beam propagated on the array downlead, and we demonstrate the robustness of the measurement in the presence of the complex transverse modal structure of that reference beam.
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Kieran T. O'Mahoney, Kieran T. O'Mahoney, Donal A. Flavin, Donal A. Flavin, Lin Zhang, Lin Zhang, Ian Bennion, Ian Bennion, } "Fourier-transform-based spectral measurements on multiplexed fibre Bragg grating arrays", Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); doi: 10.1117/12.566690; https://doi.org/10.1117/12.566690
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