Polarization characters of stimulated Raman spectra in the birefringence fiber

The polarized light properties of stimulated Raman scattering (SRS) in elliptical core optical fiber is systematically studied. In experiments, eight- order Stokes lines and two- order anti-Stokes spectra are observed and some parameters are analyzed such as the polarization, Raman frequency shift of each-order Stokes spectra under different polarization state of pump light, and the experiential formula are also provided. The results are in good agreement with the experimental figures. Experiments indicate that each-order Stokes spectra polarization state of stimulated Raman scattering in the birefringence optical fiber is related not only with Raman medium but also with pump light polarization state. The influence of pump light polarization state on low-order Stokes frequency-shift is lower but higher on the high-order Raman Stokes frequency shift fluctuation.