Design and optimization of photonic crystal fiber with low confinement loss guiding 98 OAM modes in THz band

A newer and efficient solid core with air holes and ring based circular photonic crystal fiber (C-PCF) design is proposed and studied. The SF2 doped ring core C-PCF structure with three layers of air holes is developed to communicate terahertz band in the range of 1-3 THz with >10(-4) mode index separation. The finite element method (FEM) is used to optimize the position, shape and dimensions of air holes for the proposed PCF architecture and evaluate the efficiency to support different orbital angular momentum (OAM) modes for communication. Our novel fiber supports 98 stable OAM modes with mode purity above 0.86 for all modes. Low Confinement loss (<10(-11) dB/cm), high effective mode area (>similar to 0.1 mm(2)) and low dispersion (<0.02 ps/THz/cm) are achieved for the proposed design. The proposed fiber has the potential for next-generation THz applications.

Automated summary

A novel solid core with air holes and ring based circular photonic crystal fiber design has been proposed, which supports 98 stable OAM modes with low confinement loss and dispersion for next-generation terahertz applications.