Polarization switching and suppression of stimulated Raman scattering in birefringent optical fibers

Year: 1998

Authors: Tchofo Dinda P., Millot G., Wabnitz S.

Autors Affiliation: Laboratoire de Physique, L\’Université de Bourgogne, Europ. Space Agy. 5027 Ctr. Natl. R., Avenue Alain Savary, 21011 Dijon, France

Abstract: We analyze stimulated Raman scattering in normally dispersive highly birefringent fibers under dual frequency, orthogonal polarization pumping. Experiments show that stimulated Raman scattering can be suppressed in anyone of the fiber axes by two distinct processes prevailing at large and small group-velocity mismatches (GVM\’s), respectively, between the pumps. For a relatively large GVM, parametric four-wave mixing is the dominant process for the suppression of Raman-Stokes radiation. On the other hand, for a small GVM, 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. The sign of the GVM between the pumps allows for selecting the particular fiber axis where suppression of the Raman-Stokes radiation is desired. This selection is achieved by simply tuning the frequency spacing between the pumps.


Volume: 15 (5)      Pages from: 1433  to: 1441

KeyWords: Amplification; Birefringence; Electrons; Four wave mixing; Frequency domain analysis; Light polarization; Mathematical models; Neodymium lasers; Optical fibers; Refractive index, Linear stability analysis; Nonlinear Schrodinger equations; Raman Stokes radiation; Stimulated Raman scattering, Raman scattering
DOI: 10.1364/JOSAB.15.001433

Citations: 21
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