Michael D. DeMerchant

TL;DR: It was found that the Brillouin-loss signal intensity is linearly related to the duration of the pump pulse used to obtain the spectrum, and three distinct behaviors were observed in the spectral linewidth.

TL;DR: In this article, the structural strain measurement of tension and compression in the steel beam was demonstrated with a distributed fiber-optic sensor system based on Brillouin scattering, and the results were achieved with the introduction of a computer-controlled polarization controller, a fast digitizer-signal averager, a pulse duration control and the electrical optical modulator bias setting in software.

TL;DR: A new technique is reported that permits the simultaneous measurement of strain and temperature to resolutions of +/-178 microepsilon and +/-3.9 degrees C at a spatial resolution of 3.5 m by incorporation of the Brillouin-loss peak power with the conventional BrillouIn-frequency measurement.

TL;DR: In this article, the authors developed an automated system for strain measurements in a distributed sensing system that uses a novel signal processing technique to measure strain at resolutions finer than the Brillouin line width limit.

TL;DR: The strain measurement of a 1.65-m reinforced concrete beam by use of a distributed fiber strain sensor with a 50-cm spatial resolution and 5-cm readout resolution is reported.