收稿日期: 2016-04-28
网络出版日期: 2018-03-02
基金资助
国家自然科学基金资助项目(61377083, 61077065)
Refractive index characteristics and mode splitting of long-period fiber gratings written in the tapered fiber
Received date: 2016-04-28
Online published: 2018-03-02
周超, 石磊, 邹芳, 刘云启 . 拉锥光纤长周期光栅模式分裂与折射率特性[J]. 上海大学学报(自然科学版), 2018 , 24(1) : 27 -32 . DOI: 10.12066/j.issn.1007-2861.1778
Transmission characteristics of long-period fiber gratings (LPFGs) written in a tapered fiber is investigated by numerical simulation. It has been found that splitting of the mode distribution curve happens for the same order cladding mode of LPFG when the thinnest diameter of the tapered fiber is between 55 $\mu$m and 110 $\mu$m. The two resonance dips correspond to splitting from the same order cladding mode show different refractive index characteristics.
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