Full non-destructive characterization of doped optical fibre preforms
Full non-destructive characterization of doped optical fibre preforms
复制标题
掺杂光纤预制棒的完整无损表征
DOI：
10.1117/12.2508350
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Vivona M
中科院分区：
文献类型：
--
作者：
Vivona M
我们提出了一种非破坏性的光学技术的稀土掺杂的光学预制件的充分表征。具体而言，通过分别进行射线偏转和光致发光投影测量，在光学预制件的相同区域中进行折射率和活性掺杂剂的组合分布。以这种方式，由折射率分布描绘的光学芯用于限定芯内的实际活性掺杂剂分布。使用相同的实验装置，还可以唯一地提供在堆芯内达到的活性离子浓度的最大值。对高浓度Yb ~（3+）掺杂光纤预制棒样品进行了研究。与独立的测量，如由商业折射率剖面仪和微观结构二次离子质谱分析进行的比较，证实了所提出的技术在光学特性评估的准确性。
We present a non-destructive optical technique for a full characterization of rare-earth-doped optical preforms. Specifically, a combined profiling of refractive-index and active-dopant was carried out in the same region of optical preforms by performing ray deflection and photoluminescence projection measurements, respectively. In this way, the optical core, delineated by the refractive index profile, was used to define the actual active dopant distributions within the core. Using the same experimental set-up, it was also possible to uniquely provide the maximum value of active-ion concentration reached inside the core. The study was carried out on an optical fiber preform sample doped with Yb3+ions in high concentration. Comparison with independent measurements, such as those performed by a commercial refractive index profiler and microstructural secondary-ion mass spectrometry analysis, confirms the accuracy of the proposed technique in the optical features evaluation.