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High accuracy interrogation of a WDM FBG sensor array using radiation modes from a B-FBG

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Abstract

We report the development of a very low cost WDM optical sensor array interrogation system using the radiation modes from a blazed fibre Bragg grating. We present results indicating 70nm bandwidth, 2.1ρm RMS deviation from linear when decoding an FBG temperature sensor with only 0.2ρm RMS noise and a minimum WDM spacing of only 30ρm. We further show the system to be polarization independent.

© 2003 Optical Society of America

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