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Fringe pattern analysis with a parametric method for measurement of absolute distance by a frequency-modulated continuous optical wave technique

机译:使用调频连续光波技术通过参数方法对绝对距离进行条纹图案分析

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Interferometry associated with an external cavity laser of long coherence length and broad wavelength tuning range shows promising features for use in measurements of absolute distance. As far as we know, the processing of the interferometric signals has until now been performed by Fourier analysis or fringe counting. Here we report on the use of an autoregressive model to determine fringe pattern frequencies. This concept was applied to an interferometric device fed by a continuously tunable external-cavity laser diode operating at a central wavelength near 1.5 μm. A standard uncertainty of 4×10~(-5) without averaging at a distance of 4.7 m was obtained.
机译:与长相干长度和宽波长调谐范围的外腔激光器相关的干涉测量法显示出可用于绝对距离测量的有前途的功能。据我们所知,到目前为止,干涉信号的处理都是通过傅立叶分析或条纹计数来进行的。在这里,我们报告了使用自回归模型来确定条纹图案频率的情况。该概念被应用于由连续可调的外腔激光二极管馈电的干涉仪设备,该二极管在中心波长1.5μm附近工作。得到的标准不确定度为4×10〜(-5),而未在4.7 m处进行平均。

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    《Applied optics》 |2003年第6期|共5页
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