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Tellurite glass based optical fiber for the investigation of supercontinuum generation and nonlinear properties

R. Amin,L. Abdulrazak,S. R. Tahhan,N. Mohammadd,K. Ahmed,F. Bui,S. Ibrahim

Published 2022 in Physica Scripta

ABSTRACT

This manuscript introduces a unique tellurite core-based photonic crystal fiber (PCF) with silica clad and circular air holes, which manifests highly birefringent and non-linear characteristics. Several optical features, such as birefringence (Br), nonlinear coefficients (NLC), dispersion (D), confinement loss (CL), material loss, etc are thoroughly analyzed and explored by applying the finite element method (FEM). The simulated outcomes validate that by optimizing the formation of the cladding region, a large NLC of 7650W−1Km−1, as well as an ultra-high Br of 11.2810−2 and zero-dispersion can be accomplished in the offered PCF design at 1.56 μm wavelength. Moreover, the evaluated findings indicate that the stated fiber structure is capable of generating a wide supercontinuum spectrum spanning from 943 to 8038nm when augmented with a 4.5kW input power and a pulse duration of 20fs. Calculations and analyses have been carried out on the effects of higher-order dispersion co-efficients, pulse length and input power on spectrum broadening. The advanced PCF design will be a suitable candidate for practical applications in numerous fields, including bio photonics, biomedical imaging, biosensing, spectroscopy and ultra-broadband signal amplification, etc.

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