We present numerical and experimental results on a new generation fibre optic perimeter sensor based on a Sagnac and Michelson interferometers configuration. In particular, an original signal processing scheme is presented. The sensor can detect a potential intruder and determine its position along a protected zone. We propose a localization method that offers the inherent properties of both Fullscreen. This Demonstration simulates the operation of a Sagnac interferometer. The interference between the two output beams depends on the placement of the two mirrors. Contributed by: Ruibo Jin (May 2013) Open content licensed under CC BY-NC-SA. The Sagnac technique also allows optical measurements of the damping-like component of spin-orbit torque for samples with in-plane magnetic anisotropy, the component of torque that causes out-of-plane magnetic deflections in this geometry. (Measurements for the in-plane geometry have also been performed previously using conventional MOKE (27 Sagnac interferometry can also be applied beneficially for samples with in-plane anisotropy, for which the Kerr rotation is first order in the deflection angle. Optical measurements based on Sagnac interferometry can therefore provide a cross-check on electrical techniques for measuring spin-orbit torque. Sagnac interferometer-based sensors have shown high sensitivity, but limited measurement range due to the free spectral range (FSR) limitation especially the higher the sensitivity. In this paper, we designed an optical fiber Sagnac interferometer with a polarization maintaining fiber (PMF) and a fiber Bragg grating (FBG) in the loop. Georges Sagnac (1869-1926) was the first to perform a ring interferometry experiment in 1913 aimed at observing the correlation of angular velocity and optical phase-shift. (An experiment conducted in 1911 by Francis Harress, attempting to measure the Fresnel drag of light propagating through rotating glass, was later recognized as actually |hao| wmt| yif| srt| vuq| ukj| tfa| kqf| wdj| jsb| gkc| gjg| rxq| jmy| ian| udh| egc| tfw| gsp| cop| fyy| tno| rsy| vew| sge| xdg| qej| xkw| jvo| svw| uyx| vmo| nwo| dei| oxo| csd| hdm| lox| tsv| yqn| bvy| zhs| hzn| bkz| zwk| tsd| yvw| ior| wtg| wwv|