Abstract

Beams carrying orbital angular momentum (OAM) already play significant roles in many domains. Here we propose a practical design of an OAM beam splitter based on a single phase-only multi-ring azimuthal-quadratic diffraction optical element that can sort different OAM components into various spatial positions, and OAM state probing is also achieved. The performance is demonstrated through proof-of-principle experiments and shows favorable results. Furthermore, the intensity proportion of each OAM component, namely the OAM spectrum, is also diagnosed. This work offers high applicability and practicability for the recognition and separation of photon OAM, and thus paves the way for many advanced scenarios such as quantum communication, holographic encryption, and remote sensing.

© 2022 Optica Publishing Group

Adjusted EfficientNet for the diagnostic of orbital angular momentum spectrum

Jiaqi Wang, Shiyao Fu, Zijun Shang, Lan Hai, and Chunqing Gao
Opt. Lett. 47(6) 1419-1422 (2022)

Low-loss and helical-phase-dependent selective excitation of high-order orbital angular momentum modes in a twisted ring-core fiber

Yan Wu, Jianxiang Wen, Mengdi Zhang, Ying Cao, Wei Chen, Xiaobei Zhang, Taximaiti Yusufu, Fufei Pang, and Tingyun Wang
Opt. Lett. 47(16) 4016-4019 (2022)

Spin-entangled orbital angular momentum filter of photons based on a chiral long-period fiber grating

Xiongfeng Rao, Li Yang, Jue Su, Qiming Ban, Xu Deng, and Wei Wang
Opt. Lett. 47(22) 5758-5761 (2022)

Multiplication of orbital angular momentum via multi-plane light conversion

Lixun Wu, Weihang Zhong, Zituo Wu, Zhouxin Liang, Lin He, Zhongzheng Lin, Hongjia Chen, and Yujie Chen
Opt. Lett. 49(4) 887-890 (2024)

Multi-channel orbital angular momentum detection with metahologram

Guanghao Rui, Yanbao Ma, Bing Gu, Qiwen Zhan, and Yiping Cui
Opt. Lett. 41(18) 4379-4382 (2016)