Abstract

We explore terahertz (THz) orbital angular momentum (OAM) modes supported in multimode Kagome hollow-core fibers. Numerical models are adopted to characterize the effective indices and confinement losses of vector modes over 0.2–0.9 THz, where two low-loss transmission windows are observed. Linearly combining the vector modes, THz OAM states can be generated. Covering a broad bandwidth of 0.25 THz, the purity values of OAM modes are beyond 0.9. Using numerical simulations, the hollow-core THz fibers with one and two rings of Kagome structures are also comparably investigated. We reveal that the OAM purity is dependent upon the confinement performance of THz fiber.

© 2017 Optical Society of America

Broadband orbital angular momentum transmission using a hollow-core photonic bandgap fiber

Haisu Li, Guobin Ren, Yudong Lian, Bofeng Zhu, Min Tang, Yuanchu Zhao, and Shuisheng Jian
Opt. Lett. 41(15) 3591-3594 (2016)

Two-dimensional tunable orbital angular momentum generation using a vortex fiber

Youchao Jiang, Guobin Ren, Ya Shen, Yao Xu, Wenxing Jin, Yue Wu, Wei Jian, and Shuisheng Jian
Opt. Lett. 42(23) 5014-5017 (2017)

Orbital angular momentum beam excitation using an all-fiber weakly fused mode selective coupler

S. Pidishety, S. Pachava, P. Gregg, S. Ramachandran, G. Brambilla, and B. Srinivasan
Opt. Lett. 42(21) 4347-4350 (2017)

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)

Tunable higher-order orbital angular momentum using polarization-maintaining fiber

Brendan M. Heffernan, Robert D. Niederriter, Mark E. Siemens, and Juliet T. Gopinath
Opt. Lett. 42(14) 2683-2686 (2017)