Rugged mHz-Linewidth Superradiant Laser Driven by a Hot Atomic Beam

TL;DR

This paper introduces a simple, rugged superradiant laser using a hot atomic beam that achieves ultra-narrow linewidths and high power, operating continuously, and suitable for challenging environments.

Contribution

It presents a novel hot atomic beam-based superradiant laser with continuous operation, high stability, and rugged design, advancing practical ultracoherent laser applications.

Findings

Linewidths in the millihertz range achieved

Continuous wave operation demonstrated

System is simple and rugged for practical use

Abstract

We propose a new type of superradiant laser based on a hot atomic beam traversing an optical cavity. We show that the theoretical minimum linewidth and maximum power are competitive with the best ultracoherent clock lasers. Also, our system operates naturally in continuous wave mode, which has been elusive for superradiant lasers so far. Unlike existing ultracoherent lasers, our design is simple and rugged. This makes it a candidate for the first widely accessible ultracoherent laser, as well as the first to realize sought-after applications of ultracoherent lasers in challenging environments.