Research of alignment method for polarization maintaining fiber based on double beam light source

JIA Shizhen; ZHU Yiqing; YAO Xiaotian

doi:10.7510/jgjs.issn.1001-3806.2018.06.011

LASER TECHNOLOGY > 2018 > 42(6): 785-789. > DOI: 10.7510/jgjs.issn.1001-3806.2018.06.011

JIA Shizhen, ZHU Yiqing, YAO Xiaotian. Research of alignment method for polarization maintaining fiber based on double beam light source[J]. LASER TECHNOLOGY, 2018, 42(6): 785-789. DOI: 10.7510/jgjs.issn.1001-3806.2018.06.011

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Research of alignment method for polarization maintaining fiber based on double beam light source

1.
Department of Photoelectric Information Science and Engineering, College of Science, Jiangnan University, Wuxi 241122, China
2.
Department of Photoelectric Information Engineering, Precision Instrument and Optoelectronics Engineering Institute, Tianjin University, Tianjin 300072, China

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Received Date: January 11, 2018
Revised Date: January 29, 2018
Published Date: November 24, 2018

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Abstract

Abstract

The current side-view imaging alignment method for polarization-maintaining fiber depended on the specific light intensity distribution, and had strict requirements on the position adjustment of the imaging plane. In order to improve the sensitivity of the fixed axis, increase the universality of the method and improve the stability of the fixed axis, a double-beam light source was used to replace the single-beam light source for the side-view imaging of the polarization maintaining fiber. The idea of finding the intensity distribution of the specific morphology by adjusting the image plane was changed. After theoretical analysis, simulation and experimental verification, the results show that, when using double-beam light source for side-view imaging, the light intensity distribution has bimodal pattern, and the sum of the bimodal light intensity values is selected as the eigenvalue to establish the corresponding relationship between the eigenvalue and the deflection angle. The deflection angle can be determined by cross-correlation analysis. This method not only maintains the advantages of wide range of imaging planes of polarization observation by the lens effect tracing(POL), but also has an axis sensitivity of 11.88% better than the single-beam side-view imaging alignment method. This method has good application prospects.
- fiber optics,
- alignment,
- side-view imaging,
- polarization maintaining fiber,
- light intensity distribution

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References

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