A 40 W, 780 nm laser system with compensated dual beam splitters for atom interferometry

TL;DR

This paper presents a high-power, narrow-linewidth 780 nm laser system with efficient dual beam splitting and frequency shifting, advancing atom interferometry capabilities by enabling Stark-shift compensation and reduced spontaneous emission.

Contribution

It introduces a novel laser system with 40 W power, high modulation bandwidth, and efficient dual beam splitting for improved atom interferometry applications.

Findings

Achieved 40 W laser power at 780 nm with narrow linewidth.

Implemented efficient serrodyne modulation with >96.5% efficiency.

Enabled Stark-shift compensation and minimized spontaneous emission.

Abstract

We demonstrate a narrow-linewidth 780 nm laser system with up to 40 W power and a frequency modulation bandwidth of 230 MHz. Efficient overlap on nonlinear optical elements combines two pairs of phase-locked frequency components into a single beam. Serrodyne modulation with a high-quality sawtooth waveform is used to perform frequency shifts with > 96.5 % efficiency over tens of MHz. This system enables next-generation atom interferometry by delivering simultaneous, Stark-shift-compensated dual beam splitters while minimizing spontaneous emission.