Orbital Angular Momentum Mode Converter Based on Helical Long Period Fiber Grating Inscribed by Hydrogen-Oxygen Flame

被引：106

作者：

Fu, Cailing ^{[1
]}

Liu, Shen ^{[1
]}

Bai, Zhiyong ^{[1
]}

He, Jun ^{[1
]}

Liao, Changrui ^{[1
]}

Wang, Ying ^{[1
]}

Li, Ziliang ^{[1
]}

Zhang, Yan ^{[1
]}

Yang, Kaiming ^{[1
]}

Yu, Bin ^{[1
]}

Wang, Yiping ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2018年 / 36卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Fiber optics components; fiber optics communications; gratings; optical vortices; GENERATION; CO2-LASER; WRITTEN; BEAMS;

D O I：

10.1109/JLT.2017.2787120

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A high-efficiency grating fabrication method was, for the first time, demonstrated to inscribe helical long period fiber gratings (H-LPFGs) in small numbers by means of twisting a standard single-mode fiber (SMF) during hydrogen-oxygen flame heating and then cutting the helical fiber into in series of sections. Each section of the helical fiber was a desired LPFG whose resonant wavelength, i.e., grating pitch, can be changed by adjusting the twist rate of the helical fiber. The H-LPFG inscribed in a standard SMF could be used to generate orbital angular momentum (OAM) modes, i.e., OAM(+1) mode, with a purity of 91% and a conversion efficiency of 87% within a large wavelength range from more than the cutoff wavelength of an SMF, which is highly advantageous to all-fiber optical communications based on the OAM mode-division multiplexing technique.

引用

页码：1683 / 1688

页数：6

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