Fast measurement of local PMD with high spatial resolution using stimulated Brillouin scattering

Local beat length with a 21.5cm spatial resolution is measured in one second along a single mode fibre using the polarisation dependence of stimulated Brillouin scattering, in a non-destructive and simple way

Impact of self phase modulation on the performance of Brillouin distributed fibre sensors

The spectral broadening of the pump pulse through self phase modulation in a time domain distributed Brillouin sensor\ud is demonstrated to have a non-negligible detrimental effect, leading to a doubling of the effective gain linewidth after\ud some 20 km in standard conditions. The theoretical modeling is fully confirmed by experimental results