Multimode optical fiber radiation modal decomposition

TL;DR

This paper introduces a method for decomposing the radiation modes in a multimode optical fiber using the output field distribution and non-orthogonal mode decomposition, enabling detailed analysis of light propagation.

Contribution

It presents a novel approach for modal decomposition in multimode fibers based on the output field and non-orthogonal mode expansion, advancing optical fiber analysis techniques.

Findings

Successfully calculated complex expansion coefficients for theoretical data.

Demonstrated the feasibility of modal decomposition using the output field.

Enhanced understanding of mode contributions in multimode fibers.

Abstract

We proposed the method of the optical fiber modal decomposition of the radiation propagating in a multimode optical fiber with a step like refractive index profile. The field distribution at the output end of the fiber was used. The method is based on the field decomposition by non-orthogonal modes. The full complex expansion coefficients of the light field were calculated for theoretical data.