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General Information
    • ISSN: 1793-8198 (Print)
    • Abbreviated Title: Int. J. Mater. Mech. Manuf.
    • Frequency: Bimonthly
    • DOI: 10.18178/IJMMM
    • Editor-in-Chief: Prof. Ian McAndrew
    • Co-editor-in-Chief: Prof. K. M. Gupta
    • Executive Editor: Cherry L. Chen
    • Abstracting/Indexing: EI (INSPEC, IET), Chemical Abstracts Services (CAS),  ProQuest, Crossref, Ulrich's Periodicals Directory,  EBSCO.
    • E-mail ijmmm@ejournal.net

Editor-in-chief
Prof. Ian McAndrew
Capitol Technology University, USA
It is my honor to be the editor-in-chief of IJMMM. I will do my best to work with the editorial team and help make this journal better.

IJMMM 2020 Vol.8(2): 57-63 ISSN: 1793-8198
DOI: 10.18178/ijmmm.2020.8.2.484

Coupling Efficiency Optimization for the Optical Fiber Lens with Oval-Shaped Endfaces by Applying Uniform Design and Kriging Interpolation

Chialing Hsieh, Fangchen Dong, and Chengkang Lee
Abstract—The purpose of this study is to optimize the coupling efficiency of an optical fiber lens by applying the uniform design of experiments and Kriging interpolation methods. A third-generation optical fiber endface polishing machine is applied to polish the optical fiber endfaces into oval shapes. A type-36 optical fiber fusion splicer is used to fuse the optical fibers into a lens. In the polishing process, the control factors are polishing angle, feeding rate, and rotation speed. Firstly, the uniform design of experiments method is used to construct a set of experiments. The constructed experiments are scattered uniformly in the design space formed by the control factors. Secondly, the coupling efficiency of the lens in each experiment is measured using a 980 nm laser diode and a power meter. Thirdly, the Kriging interpolation method is used to transform the discrete data of coupling efficiency into a continuous surrogate model of coupling efficiency. Finally, a mixed optimization algorithm combining a global search algorithm, genetic algorithm (GA), and a local search algorithm, Nelder-Mead simplex (NMS) algorithm, is used to optimize the coupling efficiency. The optimal solutions of polishing angle, feeding rate, and rotation speed are 56°, 289 rpm, and 52 µm/rev, respectively. By integrating the uniform design of experiments method and Kriging interpolation method, the coupling efficiency of the optical fiber lens can be improved from 60.89% to 79.63%. The improved rate of the coupling efficiency is 30.8%.

Index Terms—Fiber lens coupling efficiency, Kriging interpolation, laser diode, uniform design.

Chialing Hsieh and Chengkang Lee are with the Department of Industrial Engineering and Management, Cheng Shiu University, Kaohsiung, Taiwan (e-mail: k6758@gcloud.csu.edu.tw, cklee@gcloud.csu.edu.tw).
Fangchen Dong is with the College of Mechanical and Electrical Engineering, Shandong Yingcai University, Jinan, Shandong, China (e-mail: 28891181@qq.com).

[PDF]

Cite: Chialing Hsieh, Fangchen Dong, and Chengkang Lee, "Coupling Efficiency Optimization for the Optical Fiber Lens with Oval-Shaped Endfaces by Applying Uniform Design and Kriging Interpolation," International Journal of Materials, Mechanics and Manufacturing vol. 8, no. 2, pp. 57-63, 2020.

Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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