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Opt Lett. 1989 Mar 15;14(6):329-31.

Brillouin gain variation due to a polarization-state change of the pump or Stokes fields in standard single-mode fibers.


The effect of pump or Stokes field polarization-state changes on Brillouin gain is investigated in standard (non-polarization- maintaining) single-mode fibers with a modal birefringence of ~10(-7). The Brillouin gain change due to polarization azimuth variation of the input pump or Stokes field reaches +/-31% of the average gain expected for a completely scrambled polarization state. This polarization effect on the Brillouin gain may lead to cross-talk fluctuation in bidirectional coherent transmission systems and to degradation of Brillouin amplifier performance.

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