Time-and-spatial-multiplexing tree topology for fiber-optic Bragg-grating sensors with interferometric wavelength-shift detection

Lobo Ribeiro, Antonio B.; Rao, Y. J.; Zhang, L.; Bennion, I.; Jackson, D. A.

http://hdl.handle.net/10284/7908

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Authors

Lobo Ribeiro, Antonio B.

Abstract(s)

A combined time-and-spatial-division-multiplexed tree topology with eight fiber-optic Bragg-grating sensors operating at the 830-nm wavelength was constructed and tested for both quasistatic and periodic strain and temperature measurements. The system uses a interferometric wavelength-shift discriminator and incorporates a reference channel for thermal drift compensation in the output. Dynamic sensor sensitivity, as determined by primary noise sources, is evaluated, and numerical results are presented and compared with experimental results.