Acta Optica Sinica, Volume. 7, Issue 1, 62(1987)
Far field patterns of the modes emitted from a weakly guiding optical fiber
It is proved theoretically in this paper that the field patterns of the traveling modes in a weakly guiding optical fiber are quite similar with those of the fiber-emitted modes in the far-field region. Based on our results, far-field peak intensities of the diffraction-added lobes observed on a screen are 2-3 orders of magnitude smaller than those of mode patterns. Therefore, it is possible to determine the traveling mode in a fiber from its far-field pattern.
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WANG QI, YANG TIANLONG, SHEN WENDA. Far field patterns of the modes emitted from a weakly guiding optical fiber[J]. Acta Optica Sinica, 1987, 7(1): 62