Wavelength Tunable OAM Mode Converters Based on Chiral Long-Period Gratings

被引：15

作者：

Zhao, Xinyi ^{[1
]}

Liu, Yunqi ^{[1
]}

Liu, Zuyao ^{[1
]}

Mou, Chengbo ^{[1
]}

Shen, Lei ^{[2
]}

Zhang, Lei ^{[2
]}

Luo, Jie ^{[2
]}

机构：

[1] Shanghai Univ, Joint Int Res Lab Specialty Fiber Opt & Adv Commu, Key Lab Specialty Fiber Optic & Opt Access Networ, Shanghai 200444, Peoples R China

[2] Yangtze Opt Fiber & Cable Joint Stock Ltd Co, State Key Lab Opt Fiber & Cable Mfg Technol, Wuhan 430073, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2020年 / 32卷 / 24期

基金：

中国国家自然科学基金;

关键词：

Diffraction; Fiber gratings; Optical fiber communication; Orbits; Sensors; Telecommunications; Gratings; Chiral long-period gratings; mode conversion; high-order modes; orbital angular momentum; few-mode fiber; FIBER GRATINGS; WRITTEN; GENERATION;

D O I：

10.1109/LPT.2020.3038284

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：

We have demonstrated direct generation of high-order orbital angular momentum (OAM) modes by chiral long-period gratings (CLPGs) written in a few mode fiber (FMF) via a CO2 laser. The high-order core modes (LP11, LP21, and LP31 modes) were realized by the CLPGs through high order diffraction modes with efficiencies of more than 99.69%. The -1(st), -2(nd), and -3(rd) order OAM modes can be generated directly by the CLPGs with various grating periods. The proposed method opens a new path to implement all fiber high-order OAM mode generation. The OAM mode converters can be adopted as wavelength tunable mode converters by adjusting twist rate of the CLPGs, which could be widely used in optical communication and fiber sensing system based on FMFs.

引用

页码：1519 / 1522

页数：4

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