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Proceedings Paper

Modified algorithm for calculating the center position of optical vortices in the space optical communication system
Author(s): Xiaoli Yin; Peng Yin; Xiaozhou Cui; Huan Chang; Kaiwen You; Jia Lei
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Paper Abstract

The fine tracking system is important to improve the performance of orbital angular momentum (OAM) space optical communication system. In order to improve the accuracy and stability of the centroid algorithm, this article proposes a modified algorithm to detect the center position of OAM light beam. The modified algorithm firstly takes a binary-conversion with the threshold based on the intensity profile of OAM beam, and then calculates the center position of the light spot using centroid algorithm. The threshold for binary-conversion of Laguerre-Gaussian (LG) beam is obtained by theoretical analysis and numerical calculation. The accuracy, stability and complexity of the modified algorithm are studied by numerical simulation. The results show that the new algorithm, compared with the centroid algorithm, has 2 orders of magnitude higher in computing accuracy and 3∼4 orders of magnitude higher in stability. However, the computing time has increased by about 1.5 times compared with the centroid algorithm.

Paper Details

Date Published: 5 January 2017
PDF: 6 pages
Proc. SPIE 10244, International Conference on Optoelectronics and Microelectronics Technology and Application, 1024409 (5 January 2017); doi: 10.1117/12.2264542
Show Author Affiliations
Xiaoli Yin, Beijing Univ. of Posts and Telecommunications (China)
Peng Yin, Beijing Univ. of Posts and Telecommunications (China)
Xiaozhou Cui, Beijing Univ. of Posts and Telecommunications (China)
Huan Chang, Beijing Univ. of Posts and Telecommunications (China)
Kaiwen You, Beijing Univ. of Posts and Telecommunications (China)
Jia Lei, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 10244:
International Conference on Optoelectronics and Microelectronics Technology and Application
Shaohua Yu; Jose Capmany; Yi Luo; Yikai Su; Songlin Zhuang; Yue Hao; Akihiko Yoshikawa; Chongjin Xie; Yoshiaki Nakano, Editor(s)

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