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Proceedings Paper

Research on alignment method of the polarization coupling testing system
Author(s): Li Yang; Zhichao Yang; Jun Yang; Libo Yuan
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Paper Abstract

The optical coherence domain polarization (OCDP) system based on white light interferometry is used for the detection of distributed polarization mode coupling point in the polarization-maintaining fiber (PMF). Compared with existing OCDP, in order to detect the polarization coupling amplitude between the fast-axis and slow-axis of high precision PM fiber optic gyro ring, this paper presents a method of angular alignment for measuring polarization coupling in PMF used for OCDP. We add a light intensity detector and two alignment devices in the OCDP. We use the light intensity detector to detect the polarization of rotated PM fiber real-timely and use the two align devices to control the polarization of input and output PMF of fiber optic ring respectively. Based on the theory of Jones, we establish the simulation model of the polarization detection system so as to simulate the influence of different input or output polarization on light intensity; we also design the alignment system of PMF. The experimental results show that the above method can effectively achieve the polarization-maintaining fiber alignment, ratio of axial is 1°, measure the polarization coupling of optical fiber ring without optical fiber fusion splicing, and does not destroy the symmetry of sensitive ring. Overall, the method is simple and high precision.

Paper Details

Date Published: 22 November 2011
PDF: 7 pages
Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 81990B (22 November 2011); doi: 10.1117/12.904936
Show Author Affiliations
Li Yang, Harbin Engineering Univ. (China)
Zhichao Yang, Harbin Engineering Univ. (China)
Jun Yang, Harbin Engineering Univ. (China)
Libo Yuan, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 8199:
2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Brian Culshaw; YanBiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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