Open AccessTheoretical and experimental study of multi-element coherent fiber array
Author(s) -
Fan Xin-Yan,
Jingjiao Liu,
Jinsheng Liu,
Wu Jing-Li
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.2462
Subject(s) - strehl ratio , optics , side lobe , fiber , phase (matter) , hexagonal crystal system , materials science , physics , wavefront , telecommunications , computer science , chemistry , quantum mechanics , antenna (radio) , composite material , crystallography
The theoretical model of the hexagonal fiber array is established based on Fraunhofer diffraction theory. The far field distribution of the hexagonal fiber array is presented. Energy contained in the central lobe and Strehl ratio are taken as the two evaluation parameters of coherent combined system. The effects of arrangement, amplitudefilling factor and phase errors on far field distribution are analyzed and simulated. A seven-element hexagonal fiber array with a hexagonal prism is experimentally constructed. The hill climbing method is employed to detect and lock the element phase. The filling factor of the coherent array achieves 066. The combined beam of Strehl ratio of 070 and energy contained in the central lobe of 040 is experimentally obtained. And the energy contained in the central lobe of two-element linear array and four-element square array are 045 and 018, respectively.