High Resolution PNC-OFDR With Suppressed Fading Noise for Dispersive Media Measurement
High Resolution PNC-OFDR With Suppressed Fading Noise for Dispersive Media Measurement
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DOI：
10.1109/jlt.2013.2238505
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发表时间：
2013-03
影响因子：
4.7
通讯作者：
Y. Koshikiya;Xinyu Fan;F. Ito;Zuyuan He;K. Hotate
中科院分区：
文献类型：
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作者：
Y. Koshikiya;Xinyu Fan;F. Ito;Zuyuan He;K. Hotate
研究表明，在相位噪声补偿的光频域反射计（PNC-OFDR）中，使用光梳状光源可以有效地降低衰落噪声，而不会降低反射性能。光学梳状光源提供宽波长可调性，这是频移平均（FSAV）所需的，用于衰落降噪，同时保持作为种子光波的光纤激光器的窄线宽。我们还澄清了带有参考干涉仪的PNC-OFDR同时补偿了宽带测量和色散介质引起的相位噪声和群速度色散（GVD）。这些PNC-OFDR功能使我们能够在10公里范围内实现低衰落噪声和高空间分辨率的瑞利散射水平的高精度测量。
We show that fading noise in phase-noise compensated optical frequency domain reflectometry (PNC-OFDR) can be effectively reduced by applying an optical comb light source without any degradation in the reflectometry performance. The optical comb light source provides broad wavelength tunability, which is required for the frequency shift averaging (FSAV) for fading noise reduction while maintaining a narrow linewidth of the fiber laser used as a seed lightwave. We also clarify that PNC-OFDR with a reference interferometer simultaneously compensates for both phase noise and group velocity dispersion (GVD) induced by wideband measurement and a dispersive medium. These PNC-OFDR functions enable us to realize a high accuracy measurement of Rayleigh scattering level with low fading noise and high spatial resolution over 10 km range.