Browsing by Author "Bennion, I."
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- Combined spatial- and time-division-multiplexing scheme for fiber grating sensors with drift-compensated phase-sensitive detectionPublication . Rao, Y. J.; Zhang, L.; Bennion, I.; Lobo Ribeiro, Antonio B.; Jackson, D. A.A combined spatial- and time-division-multiplexing topology with drift-compensated high-resolution wavelength-shift detection is reported for fiber Bragg grating sensors. An eight-element grating sensor array is demonstrated based on this topology. A resolution of ~1.2 microepsilon over a range of ~1.5 mepsilon with a measurement bandwidth of 30 Hz (~0.22 microepsilon/ radicalHz) has been achieved for quasi-static strain measurement.
- Time-and-spatial-multiplexing tree topology for fiber-optic Bragg-grating sensors with interferometric wavelength-shift detectionPublication . Lobo Ribeiro, Antonio B.; Rao, Y. J.; Zhang, L.; Bennion, I.; Jackson, D. A.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.