Ultra-broadband fiber mode converter based on apodized phase-shifted long-period gratings

被引：34
|
作者：
Zhao, Yunhe [1 ,2 ]
Liu, Zuyao [2 ]
Liu, Yunqi [2 ]
Mou, Chengbo [2 ]
Wang, Tingyun [2 ]
Yang, Yongsheng [1 ]
机构：
[1] Shanghai Maritime Univ, Inst Logist Sci & Engn, 1550 Haigang Ave, Shanghai 201306, Peoples R China
[2] Shanghai Univ, Key Lab Specialty Fiber Opt & Opt Access Network, 99 Shangda Rd, Shanghai 200444, Peoples R China
来源：
OPTICS LETTERS | 2019年 / 44卷 / 24期
基金：
中国国家自然科学基金;
关键词：
CONVERSION; WRITTEN;
D O I：
10.1364/OL.44.005905
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We have demonstrated an ultra-broadband fiber mode converter based on CO2-laser inscribed length apodized phase-shifted long-period gratings (LPGs) with a three-section linear length apodization profile, where a .sr-phase shift was introduced between two adjacent grating sections. The grating parameters were optimized theoretically to achieve the broadband mode conversion between the LP10 mode and LP11 mode. The demonstrated device provides mode conversion efficiency higher than 90% over an ultra-broad bandwidth of similar to 182 nm. The insertion loss of the LPGs is negligible. Orbital angular momentum modes with left- and right-handed circular polarization can be generated from the demonstrated ultra-broadband mode converter successfully. (C) 2019 Optical Society of America
引用
收藏
页码：5905 / 5908
页数：4
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