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Opt Lett. 2004 Oct 1;29(19):2222-4.

Interrogating fiber Bragg grating sensors by thermally scanning a demultiplexer based on arrayed waveguide gratings.

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  • 1Photonics Systems Group, Institute for National Measurement Standards, National Research Council of Canada, Ottawa, Ontario KIA OR6, Canada. George.Xiao@nrc-cnrc.gc.ca


We evaluate a wavelength interrogation technique based on an arrayed waveguide grating (AWG). Initial results show that the Bragg wavelength of fiber Bragg grating (FBG) sensors can be precisely interrogated by thermally scanning an AWG-based demultiplexer. The technique potentially offers a low-cost, compact, and high-performance solution for the interrogation of FBG distributed sensors and multisensor arrays.

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