Broadband optical isolator in fibre optics

TL;DR

This paper introduces a broadband optical isolator for fiber optics using achromatic and non-reciprocal wave plates between crossed polarizers, offering a robust and efficient design based on adiabatic evolution of the Stokes vector.

Contribution

It presents a novel broadband optical diode design combining achromatic and non-reciprocal wave plates with a robust adiabatic approach, suitable for fiber optic implementation.

Findings

Design achieves broadband isolation in fiber optics.

Utilizes adiabatic evolution for robustness and efficiency.

Proposes a feasible fiber optic implementation.

Abstract

We propose a broadband optical diode, which is composed of one achromatic reciprocal quarter-wave plate and one non-reciprocal quarter-wave plate, both placed between two crossed polarizers. The presented design of achromatic wave plates relies on an adiabatic evolution of the Stokes vector, thus, the scheme is robust and efficient. The possible simple implementation using fiber optics is suggested.