Abstract

A study has been made of the accuracy of measuring the attenuation coefficient in a single-mode optical fiber using Rayleigh reflectometry. It has been theoretically established that the minimum achievable uncertainty of such measurements is determined only by the spectral properties of the probe radiation and decreases with an increase in the length of the measured fiber to the power of 1.5. A statistical analysis of the results of measuring the attenuation coefficient in different segments of a real single-mode fiber by their reflectograms demonstrates results that are consistent with theoretical conclusions. The results set limits on the minimum fiber length for which the attenuation coefficient can be measured with the required accuracy.

中文翻译：

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使用瑞利OTDR可获得的单模光纤中的衰减系数测量的最小不确定度

摘要

已经对使用瑞利反射法测量单模光纤中的衰减系数的准确性进行了研究。从理论上已经确定，此类测量的最小可实现不确定度仅由探针辐射的光谱特性决定，并随被测光纤长度的增加而减小，直至功率为1.5。对通过反射图测量实际单模光纤不同部分的衰减系数的结果进行统计分析，结果与理论结论相符。结果设定了最小光纤长度的限制，可以以所需的精度测量衰减系数。