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Optical Engineering

Development of an embedded instrument for autofocus and polarization alignment of polarization maintaining fiber
Author(s): Di Feng; Qimeng Fang; Huaibo Huang; Zhengqi Zhao; Ningfang Song
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Paper Abstract

The development and implementation of a practical instrument based on an embedded technique for autofocus and polarization alignment of polarization maintaining fiber is presented. For focusing efficiency and stability, an image-based focusing algorithm fully considering the image definition evaluation and the focusing search strategy was used to accomplish autofocus. For improving the alignment accuracy, various image-based algorithms of alignment detection were developed with high calculation speed and strong robustness. The instrument can be operated as a standalone device with real-time processing and convenience operations. The hardware construction, software interface, and image-based algorithms of main modules are described. Additionally, several image simulation experiments were also carried out to analyze the accuracy of the above alignment detection algorithms. Both the simulation results and experiment results indicate that the instrument can achieve the accuracy of polarization alignment < ± 0.1    deg .

Paper Details

Date Published: 12 December 2017
PDF: 13 pages
Opt. Eng. 56(12) 124103 doi: 10.1117/1.OE.56.12.124103
Published in: Optical Engineering Volume 56, Issue 12
Show Author Affiliations
Di Feng, Beihang Univ. (China)
Qimeng Fang, Beihang Univ. (China)
Huaibo Huang, Institute of Automation (China)
Zhengqi Zhao, Beihang Univ. (China)
Ningfang Song, Beihang Univ. (China)

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