双折射光纤受激拉曼散射偏光特性的实验研究

Study of Polarized Light Properties of Stimulated Raman Scattering in the Birefringence Fibers

对椭圆芯光纤受激拉曼散射偏光特性进行了系统的实验研究。实验中观察到8 级斯托克斯线和2 级反斯托克斯线,对不同偏振态的抽运光激励下各级斯托克斯线的偏振特性、拉曼频移等参量进行了分析,并给出了经验公式。其结果与实验数据符合良好。实验表明,双折射光纤受激拉曼谱的各级斯托克斯线的偏振状态不但与拉曼介质有关还与抽运光的偏振态有关,入射抽运光偏振态对低阶次的斯托克斯线拉曼频移的影响较小,而对高级斯托克斯线拉曼频移影响较大。

The polarized light properties of stimulated Raman scattering (SRS) in elliptical core optical fiber is systematically. In experiments, eight orders of Stokes lines and two orders of 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 experience 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.