3D Refractive Index Measurement for Spun Polarization-maintaining Optical Fiber

被引：1

作者：

Huang S.-J. ^{[1
]}

Zeng J.-Z. ^{[1
]}

Yan C. ^{[1
]}

Lin Y.-Y. ^{[1
]}

Wang T.-Y. ^{[1
]}

机构：

[1] Key Laboratory of Special Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai

来源：

Guangzi Xuebao/Acta Photonica Sinica | 2017年 / 46卷 / 06期

基金：

中国国家自然科学基金;

关键词：

3D inner structure; 3D refractive index; Digital holography; Edge detection algorithm; Filtered back-projection algorithm; Spun polarization-maintaining optical fiber; Transverse interference system;

D O I：

10.3788/gzxb20174606.0612001

中图分类号：

学科分类号：

摘要：

Based on digital holographic tomography and transverse interference system, by means of rotating the spun polarization-maintaining optical fiber within 180° viewing angle, optimal digital holograms of a section of spun polarization-maintaining optical fiber were recorded by CCD, and then the phase information was extracted through digital image process and the angular spectrum algorithm. Using the filtered back-projection algorithm, the 2D refractive index distribution of each cross-section was retrieved in order to constitute the 3D refractive index distribution of a section of spun polarization-maintaining optical fiber, which revealed the 3D inner structure of the fiber. The measurement results show that the stress legs rotate synchronously with the spin of polarization-maintaining optical fiber, and the refractive indices of the fiber core, stress legs and cladding are unchanged. Finally, the position of the stress legs was achieved by edge detection algorithm and then the spun angle was computed. © 2017, Science Press. All right reserved.

引用

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