| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for optical reflectometry measuring device capable of measurement by C-OFDR with a high-distance resolution. SOLUTION: The device is provided with the monitoring part 12 for monitoring the nonlinearity of the frequency sweep of the coherent light source 1, based on this monitoring results, the measurement results in the measuring part 11 is corrected, i.e. at the monitoring part 12, by the self delayed homodyne detection, the monitoring beat signal of the light source output light is generated, the wave shape of which is sampled by the sampling part 16. The continuous function R(t) indicating the waveform is analyzed, and the zero cross points are obtained. The continuous function obtained by sampling the interference beat signal at the measuring part 11 is substituted with the zero cross points of the continuous function R(t), wherein the numerous train obtained is FFT processed. Then the measurement results are obtained. COPYRIGHT: (C)2008,JPO&INPIT
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