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首页> 外文期刊>Applied optics >Theoretical and experimental study of suppressing stimulated Brillouin scattering and phase noise in interferometric fiber sensing systems with phase modulation
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Theoretical and experimental study of suppressing stimulated Brillouin scattering and phase noise in interferometric fiber sensing systems with phase modulation

机译：相位调制抑制干涉式光纤传感系统中受激布里渊散射和相位噪声的理论和实验研究

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The effect of phase modulation on the phase noise in remote interferometric fiber sensing systems is analyzed in both theory and experiment. A matching condition between the modulation frequency and optical delay difference is derived to choose the matching modulation frequency. The matching modulation frequency for an interferometer with 5 m optical-path difference is 60 MHz and its integer harmonic frequencies. By matching the condition, the phase modulation method can suppress the stimulated Brillouin scattering in an interferometric fiber sensing system effectively without bringing excess phase noise, which is verified by the experiment. The results indicate that the maximum input power of the system can be increased effectively, which has great potential in the design of remote interferometric fiber-sensing systems. (C) 2015 Optical Society of America
机译：从理论和实验两方面分析了相位调制对远程干涉式光纤传感系统中相位噪声的影响。得出调制频率与光延迟差之间的匹配条件，以选择匹配的调制频率。光程差为5 m的干涉仪的匹配调制频率为60 MHz，其谐波频率为整数。通过匹配条件，相位调制方法可以有效地抑制干涉式光纤传感系统中受激布里渊散射，而不会带来过多的相位噪声，这已通过实验验证。结果表明，该系统的最大输入功率可以有效提高，这在远程干涉式光纤传感系统的设计中具有很大的潜力。 （C）2015年美国眼镜学会

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