Gain Spectrum Engineering in Distributed Brillouin Fiber Sensors
Gain Spectrum Engineering in Distributed Brillouin Fiber Sensors
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DOI：
10.1109/jlt.2019.2930919
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发表时间：
2019-10-15
影响因子：
4.7
通讯作者：
Schneider, Thomas
中科院分区：
文献类型：
--
作者：
Feng, Cheng;Lu, Xin;Schneider, Thomas
在本文中，据我们所知，将首次提出一种利用增益谱工程的布里渊光时域分析仪的新方法。通过将布里渊增益与两个对称损耗谱叠加，将提供新的自由度来设计布里渊相互作用的谱。这导致布里渊增益形状比传统增益形状更能抵抗噪声影响。仿真和实验非常吻合，并证明测量精度提高了 3 dB 以上。由于所提出的方法的频率误差不易受到光纤损耗的影响，因此传感范围最多可扩展 60%。本文可能会开辟一种通过频谱形状工程来增强和适应分布式布里渊传感性能的新方法。
In this paper, a novel method for Brillouin optical time-domain analyzers exploiting the gain spectrum engineering will be proposed for the first time, to the best of our knowledge. By superimposing the Brillouin gain with two symmetric loss spectra, new degrees of freedom will be provided to engineer the spectrum of the Brillouin interaction. This leads to a Brillouin gain shape which is much more robust to noise influences than the conventional one. Simulations and experiment are in very good agreement to each other and demonstrate a more than 3-dB measurement accuracy enhancement. Since for the proposed method the frequency error is less susceptible to the fiber loss, the sensing range can be extended by up to 60%. This paper might open a new way to enhance and adapt the distributed Brillouin sensing performances by an engineering of the spectrum shape.