Thursday, January 5, 2017

Abstract-Guiding terahertz orbital angular momentum beams in multimode Kagome hollow-core fibers

Haisu Li, Guobin Ren, Bofeng Zhu, Yixiao Gao, Bin Yin, Jing Wang, and Shuisheng Jian

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
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