brillouin-(dtss)
  • DTSS - Distributed Temperature and Strain Sensing

    • Standard single-mode optical fiber
    • Measurements all along a 120 km fiber (!)
    • Brillouin scattering is characterized by the Brillouin frequency shift 
    • Brillouin shift depends on the acoustic velocity of the medium, which is temperature and strain dependent
    • Brillouin shift provides measurement point every 1m






    • Stimulated Brillouin scattering using 2 signals 
    • Pump signal  and  Probe signal 
    • Interaction  energy transfer 
    • Counter propagation requirement 
    • 2 fibers and closed loop required