中文摘要：

为了准确、快速和无损测量光纤的折射率分布和几何尺寸,基于数字全息显微层析技术构建了光纤参数的测量系统,包括优化的光路系统和软件分析系统。以双包层光纤为实验样品,由CCD记录最优数字全息图,通过单幅最优全息图提取光纤相位差分布,由分层算法重建光纤折射率并对其进行误差分析,采用基于边缘检测的算法对重建折射率进行误差校正和几何尺寸的提取。实验结果表明,与S14折射率测量仪和显微拍摄的光纤断面测量结果对比,本文方法重建的双包层光纤折射率差值与S14的测量结果吻合,几何尺寸优于S14的测量结果。

英文摘要：

In order to accurately, fast and nondestructively measure refractive index and geometry size of an optical fiber, a system including modified optic system and software is built for measuring the parameters of optical fibers based on the digital holographic microscopy chromatography technology. Taking the double-cladding optical fiber for the example, the phase distribution is extracted from a single optimal hologram and the refractive index of the optical fiber is reconstructed by layered algorithm, where the er- ror is analyzed by simulation. The edge detection algorithm is used for error correction and geometry size measurement. Compared with the results of S14 refractive index profile and the optical fiber section obtained by microscopy, respectively, the refractive index measured by our method is consistent with that by the S14, and the geometry size is better than that by the S14.