Design and analysis of a kind of large flattened mode optical fibre |
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| Authors: | Zhao Chu-Jun Peng Run-Wu Tang Zhi-Xiang Ye Yun-Xia Fan Dian-Yuan |
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| Affiliation: | Shanghai Institute of Optics and Fine mechanics, Chinese Academy of Sciences, Shanghai 201800, China |
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| Abstract: | In this paper, a refractive index profile design enabling us to obtain a flat modalfield around the fibre centre is investigated. The theoretical approach fordesigning such multilayer large flattened mode (LFM) optical fibres is presented. Acomparison is made between the properties of a three-layer LFM structure and astandard step-index profile with the same core size. The obtained results indicatethat the effective area of the LFM fibre is about twice as large as that of thestandard step-index fibre, but the LFM fibre has less effective ability to filterout the higher order modes than the standard step-index fibre with the same bendingradius. |
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| Keywords: | LFM optical fibre nonlinear effects effective area bending loss |
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