Fiber optic sensing describes a set of differing technologies that can be used to convert a physical or an environmental change to the fiber into a measureable optical signal. Optical fiber offers the distinct advantage that it is relatively inexpensive considering that the sensors are able to measure over lengths of up to 100 km. AMS Technologies can offer systems that measure strain and temperature using either Brillouin scattering, the Raman Effect or Bragg backscattering. AMS also supply a platform of optical switches that allows multiplexing a single sensor to several fibers.
Brillouin sensors make use of the effect of light scattering in an optical waveguide caused by the presence of acoustic waves. The scattering is dependent on the frequency of the acoustic wave and shifts the frequency of the light appropriately. Spectral analysis of the scattered light highlights the frequencies at which acoustic waves are dominant and these can be correlated to temperature and/or strain that is applied to the fiber. AMS Technologies’ Brillouin sensors excel with the longest reach and highest spatial resolution available on the market.