Exploiting nonreciprocity in BOTDA systems.

  title={Exploiting nonreciprocity in BOTDA systems.},
  author={Alexia Lopez-Gil and Xabier Angulo-Vinuesa and Alejandro Dominguez-Lopez and Sonia Martin-Lopez and Miguel Gonz{\'a}lez-Herr{\'a}ez},
  journal={Optics letters},
  volume={40 10},
In this Letter, we present and demonstrate a novel technique for distributed measurements in Brillouin optical time-domain analysis based on the use of the nonlinear phase-shift induced by stimulated Brillouin scattering. Employing a Sagnac interferometer (SI), the position-resolved Brillouin phase-shift spectrum (BPS) along the fiber can be obtained, benefiting from the sensitivity to nonreciprocal phase-shifts of the SI scheme. This proposal simplifies the existing methods to retrieve the BPS… CONTINUE READING