Design and analysis of a kind of large flattened mode optical fibre

• 来源期刊: 中国物理（英文版）
• 关键词: LFM optical fibre nonlinear effects effective area bending loss
• 年，卷（期）: 2006,（8）
• 页码范围: 1838-1842
• 页数: 5页
• 语种: 英文

摘要

In this paper, a refractive index profile design enabling us to obtain a flat modal field around the fibre centre is investigated. The theoretical approach for designing such multilayer large flattened mode (LFM) optical fibres is presented. A comparison is made between the properties of a three-layer LFM structure and a standard step-index profile with the same core size. The obtained results indicate that the effective area of the LFM fibre is about twice as large as that of the standard step-index fibre, but the LFM fibre has less effective ability to filter out the higher order modes than the standard step-index fibre with the same bending radius.