An accurate method for alignment of polarization-maintaining fiber with CCD micro-imaging system

Yan-jie Li; Rui Wang; Chun-xi Zhang; Yuan-hong Yang; De-wei Yang

doi:10.1117/12.835670

6 August 2009 An accurate method for alignment of polarization-maintaining fiber with CCD micro-imaging system

Yan-jie Li, Rui Wang, Chun-xi Zhang, Yuan-hong Yang, De-wei Yang

Proceedings Volume 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications; 73841R (2009) https://doi.org/10.1117/12.835670
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

Polarization-Maintaining(PM) optical fiber connector is widely used in various kinds of optic fiber sensors and communication equipments. The alignment of PM fiber polarization axis with the orientation key axis is one of the most important factors determining the extinction ratio of the connector. In order to ensure high accurate alignment of these two axises, CCD micro-imaging system is employed to take the cross-section image of Panda PM fiber, the edge points of stress rods are extracted by sub-pixel edge detection algorithm based on Hessian matrix. Consequently, the automatic detection of the polarization axis and the accurate calculation of the angle θ between the two axises are realized. Experiment results indicate that the method, combining CCD micro-imaging system and an accurate calculation of the angle θ, is effective to improve the alignment precision, which can reach ±0.5°. The work lays the foundation for realizing the auto-manufacture of PM optical fiber connector.

Citation Download Citation

Yan-jie Li, Rui Wang, Chun-xi Zhang, Yuan-hong Yang, and De-wei Yang "An accurate method for alignment of polarization-maintaining fiber with CCD micro-imaging system", Proc. SPIE 7384, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications, 73841R (6 August 2009); https://doi.org/10.1117/12.835670

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KEYWORDS

Polarization

Phase modulation

Charge-coupled devices

Detection and tracking algorithms

Connectors

Optical fibers

Anisotropic filtering

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