Ma Yun-Feng, Wei Jue, Pei Jin-Hua, Kang Zhi-Hui, Jiang Yun, Gao Jin-Yue
College of Physics, Jilin University, Changchun 130023, People's Republic of China.
Rev Sci Instrum. 2008 Feb;79(2 Pt 1):025104. doi: 10.1063/1.2840771.
The refractive-index profile of ion-exchange channel waveguide is reconstructed by near-field measurement combined with two-dimensional inverse matrix method, which can avoid the problems brought by multimeasurements and iteration smoothing in the process. The method used here has the advantages of convenient operation and accurate results for the characteristics of the asymmetric channel waveguide. It can be also applied to the refractive-index profile measurements of graded index fibers, polarization maintaining fibers, and single-mode planar waveguides.
采用近场测量结合二维逆矩阵法重建离子交换沟道波导的折射率分布，可避免过程中多次测量和迭代平滑带来的问题。本文所采用的方法针对非对称沟道波导的特性具有操作简便、结果准确的优点。它还可应用于渐变折射率光纤、保偏光纤和单模平面波导的折射率分布测量。
