On-chip orbital angular momentum sorter for demultiplexing based on arc-shaped waveguide grating

被引：5

作者：

Wang, Zixiao ^{[1
]}

Sun, Chunran ^{[2
]}

Xiao, Shiying ^{[1
]}

Wu, Beilei ^{[1
]}

Jiang, Youchao ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Key Lab All Opt Network & Adv Telecommun Network, Minist Educ, Beijing 100044, Peoples R China

[2] China North Ind Corp, Syst Integrat Dept, Beijing 100053, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2022年 / 156卷

基金：

中国国家自然科学基金;

关键词：

Orbital angular momentum sorting; Vortex beams; Grating coupler; MODE SORTER; LIGHT; BEAMS; COMMUNICATION; COMPACT; STATES; FIBER; WDM;

D O I：

10.1016/j.optlastec.2022.108590

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An on-chip orbital angular momentum (OAM) sorter based on the arc-shaped waveguide grating coupler (AWGC) structure is proposed and numerically analyzed. Coupling characteristics of the AWGC are discussed in detailed. Utilizing the phase matching mechanism of the AWGC, unidirectional-propagation guided modes can be excited by vortex beams possessing specific topological charge. By combing multiple AWGCs having different parame-ters, the on-chip OAM sorter is constructed. Performance of OAM sorting and demultiplexing are investigated with the results confirming the high extinction ratio and low crosstalk on each output port within the C-band. The proposed structure is expected to find potential applications in OAM demultiplexing.

引用

页数：7

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