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首页> 外文期刊>Review of Scientific Instruments >Note: Improving spatial resolution of optical frequency-domain reflectometry against frequency tuning nonlinearity using non-uniform fast Fourier transform
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Note: Improving spatial resolution of optical frequency-domain reflectometry against frequency tuning nonlinearity using non-uniform fast Fourier transform

机译:注意:使用非均匀快速傅立叶变换提高光学频域反射仪的空间分辨率,以防止频率调谐非线性

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摘要

We propose using non-uniform FFT to minimize the degrading effect of frequency tuning nonlinearity of a tunable laser source (TLS) in an optical frequency-domain reflectometry (OFDR) system. We use an auxiliary interferometer to obtain the required instantaneous optical frequency of the TLS and successfully demonstrate 100 times enhancement in spatial resolution of OFDR with only a 20% increase in computation time. The corresponding measurement reflectivity sensitivity is better than -80 dB, sufficient to detect bending induced index changes in an optical fiber.
机译:我们建议使用非均匀FFT来最大程度地减小光学频域反射法(OFDR)系统中可调谐激光源(TLS)的频率调谐非线性的退化影响。我们使用辅助干涉仪获得所需的TLS瞬时光频率,并成功地证明了OFDR的空间分辨率提高了100倍,而计算时间却仅增加了20%。相应的测量反射率灵敏度优于-80 dB,足以检测光纤中弯曲引起的折射率变化。

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