# Exceptional points-based optical amplifiers

## TL;DR

This paper introduces a novel optical amplifier design leveraging exceptional points to overcome the gain-bandwidth limitation inherent in traditional amplifiers, with potential applications across various physical systems.

## Contribution

The paper presents a new design paradigm for optical amplifiers based on exceptional points, improving gain-bandwidth scaling beyond conventional limits.

## Key findings

- Achieved enhanced gain-bandwidth scaling in microcavity amplifiers
- Design principles applicable to acoustics and microwaves
- Potential for broader physical system applications

## Abstract

The finite gain-bandwidth product is a fundamental figure of merit that restricts the operation of standard optical amplifiers. In microcavity setups, this becomes a serious problem due to the narrow bandwidth of the device. Here we introduce a new design paradigm based on exceptional points, that relaxes this limitation and allows for building a new generation of optical amplifiers that exhibits better gain-bandwidth scaling relations. Importantly, our results can be extended to other physical systems such as acoustics and microwaves.