受激布O437里渊散射(SBS)的抑制性能是光纤调幅有线电视外调制发射机的关键指标之一。从理论上分析了入射偏振分别为TE与TM模时,对发射机受激布里渊散射抑制性能的影响。分析计算显示：入射光偏振态模式为TE模最佳。还对入射偏振态偏离TE模的情形进行了分析,表明为保证发射机对受激布里渊散射抑制性能,入射光偏离TE模的角度应小于10°。

The performance of Stimulated Brillouin Scattering (SBS) suppression is one of the key parameters in optical fiber AM-CATV (amplitude modulated cable television) externally modulated transmitters. The influence of the incident polarization state with TE mode and TM mode on the performance for SBS suppression in optical fiber AM-CATV externally modulated transmitters is analyzed theoretically. The analysis and calculation have shown that the TE mode is the best mode for performance of SBS suppression. The influence of the incident polarization state deviating from TE mode is also analyzed and calculated. And it is shown that the deviation angle from the TE mode should be less than 10 degrees so as to the performance for SBS suppression will not be degraded.