12 December 2017 Development of an embedded instrument for autofocus and polarization alignment of polarization maintaining fiber
Author Affiliations +
Optical Engineering, 56(12), 124103 (2017). doi:10.1117/1.OE.56.12.124103
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 .
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Di Feng, Qimeng Fang, Huaibo Huang, Zhengqi Zhao, Ningfang Song, "Development of an embedded instrument for autofocus and polarization alignment of polarization maintaining fiber," Optical Engineering 56(12), 124103 (12 December 2017). http://dx.doi.org/10.1117/1.OE.56.12.124103 Submission: Received 21 August 2017; Accepted 21 November 2017
Submission: Received 21 August 2017; Accepted 21 November 2017
JOURNAL ARTICLE
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KEYWORDS
Polarization

Detection and tracking algorithms

Image processing

Signal to noise ratio

Image analysis

Error analysis

Optical engineering

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