Efficient Photonic Crystal Fiber Design for Higher OAM Modes with Low Loss Towards Next Generation THz Communication

Abstract

A newer and efficient solid core with air holes and ring based circular photonic crystal fiber (C-PCF) design is proposed, developed, and studied. The C-PCF structure with a ring core and three layers of air holes is developed to communicate terahertz frequency of the range of 1 THz to 3 THz. Finite element method (FEM) is used to optimize the position, shape and dimensions of air holes and refractive index (RI) of material for the proposed PCF design and check the efficiency to support different orbital angular momentum (OAM) modes for communication. Our novel designed C-PCF supports multiple stable modes with mode purity above 0.9. Confinement loss is in the range of 10-12 dB/cm, highest effective mode area in the order of 1 mm2 is achieved in the investigated study for 3 THz transmission. The study observes that the performance of PCF is strongly dependent on RI of core and cladding.

Fiber design and performance analyses for optical multiplexing: terahertz optical communications

“…However, they investigated at a frequency band of 200 GHz to 900 GHz with limited optical performances like high loss and OAM purity of unlike two bands. In 2022, B Kuiri et al [19] designed a THz-OAM-supported ring core fiber with highly doped material with asymmetric and dissimilar layers of air holes. Furthermore, it is highly needed to design a fiber structure that can support THz-OAM multiplexing with some important optical factors.…”