An optical modulation method to suppress stimulated Brillouin scattering and the phase noise in a remote interferometric fiber sensing system

作者：Hu, Xiaoyang; Chen, Wei; Fan, Liwen; Meng, Zhou^*; Chen, Mo

来源：Optical Fiber Technology, 2014, 20(5): 547-551.

DOI：10.1016/j.yofte.2014.06.008

• Stimulated Brillouin scattering
• Phase modulation
• Phase noise
• Interferometric fiber sensing

A novel optical modulation method for stimulated Brillouin scattering (SBS) and the phase noise suppression in a remote interferometric fiber sensing system is proposed. Compared to the conventional phase modulation method to suppress SBS with only one phase modulation signal, another phase modulation signal with pi shift is applied at the output end of the fiber, which converts the generated multi-frequency light to single-frequency light. Therefore the method can suppress not only SBS but also the phase noise induced by linewidth broadening owing to the first phase modulation. As a result, the method can keep the system a low phase noise level with a higher input power, which overcomes the conventional drawback of linewidth broadening. The results show a good reference to the design of remote interferometric fiber sensing systems.

• 出版日期2014-10
• 单位中国人民解放军国防科学技术大学