Imaging Components, Systems, and Processing

Adaptive simultaneous algebraic reconstruction technique for retrieving refractive index profiles of optical fiber

[+] Author Affiliations
Zheng Chang

Shanghai University, Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai 200072, China

Shandong University of Technology, College of Computer Science and Technology, Zibo 255049, China

Sujuan Huang, Tingyun Wang, Qianwu Zhang, Cheng Yan, Fang Zou

Shanghai University, Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai 200072, China

Yi Shang

University of Missouri-Columbia, Computer Science Department, Columbia, Missouri 65211, United States

Opt. Eng. 55(9), 093104 (Sep 20, 2016). doi:10.1117/1.OE.55.9.093104
History: Received June 10, 2016; Accepted August 30, 2016
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Abstract.  An efficient adaptive simultaneous algebraic reconstruction technique (ASART) to calculate optical fiber refractive index profiles is proposed based on phase difference curves obtained by digital holography technique. We develop adaptive relaxation parameter (ARP) on simultaneous algebraic reconstruction technique (SART) to increase the convergence speed and improve the reconstruction accuracy. A formula of ARP is derived mathematically and multilevel scheme (MLS) is used to increase convergence speed in the first iteration. Experimental results show the proposed ASART convergences over 40% faster than SART and achieve significantly higher reconstruction accuracy. Experimental verification shows that ASART is more efficient than SART and filtered back projection in image reconstruction, especially with few projection views. The running time of ASART is much shorter than that of SART, and ASART needs fewer iteration numbers to obtain the same reconstruction effects. In addition, it can be used to measure optical fibers with various diameters that cannot be measured with S14 refractive index profiler (S14).

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zheng Chang ; Sujuan Huang ; Tingyun Wang ; Yi Shang ; Qianwu Zhang, et al.
"Adaptive simultaneous algebraic reconstruction technique for retrieving refractive index profiles of optical fiber", Opt. Eng. 55(9), 093104 (Sep 20, 2016). ; http://dx.doi.org/10.1117/1.OE.55.9.093104


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