Control processes for stimulated Raman scattering in optical fibers by dual-frequency pumping
Authors: Dinda P.Tchofo, Millot G., Wabnitz S.
Autors Affiliation: Lab de Physique de l\’Univ de, Bourgogne, Dijon, France
Abstract: Stimulated Raman scattering (SRS) in normally dispersive highly birefringent fiber, under dual-frequency, orthogonal polarization pumping is examined. It is shown that SRS can be suppressed in any of the fiber axes via two distinct processes prevailing at large and small group velocity mismatches between the pumps, respectively. For relatively large group velocity mismatch, parametric four-wave mixing is the dominant process for the suppression of Raman Stokes radiation. On the other hand, for small group of velocity mismatch, the Raman Stokes light is suppressed along the polarization direction of the highest frequency pump, through a mechanism associated with the orthogonal component of the Raman gain.
KeyWords: Dye lasers; Four wave mixing; Laser pulses; Light; Mathematical models; Natural frequencies; Neodymium lasers; Optical fibers; Optical variables control; Pumping (laser), Dual frequency pumping; Group velocity mismatch; Nanosecond pulse; Parametric four wave mixing; Raman gain; Raman Stokes light; Stimulated Raman scattering, Raman scatteringDOI: 10.1109/CLEO.1998.675978