Broadband Faraday Isolator

TL;DR

This paper proposes a broadband optical isolator using a sequence of Faraday rotators and achromatic quarter-wave plates, inspired by composite pulse techniques in quantum physics, to achieve wideband isolation.

Contribution

It introduces a novel broadband Faraday isolator design based on composite pulse analogy, combining Faraday rotators and achromatic plates for improved bandwidth.

Findings

Achieves broadband isolation performance.

Demonstrates effectiveness of composite pulse analogy in optics.

Provides a new design approach for optical isolators.

Abstract

Driving on an analogy with the technique of composite pulses in quantum physics, we propose a broadband Faraday rotator and thus a broadband optical isolator, which is composed of sequences of ordinary Faraday rotators and achromatic quarter-wave plates rotated at the predetermined angles.