A frequency doubled 1534 nm laser system for potassium laser cooling

TL;DR

This paper presents a compact, robust laser system at 767 nm for potassium cooling, generated by frequency doubling a 1534 nm fiber laser diode, enabling effective trapping of ^39 K.

Contribution

It introduces a novel, simple fiber laser-based system for potassium cooling that simplifies the generation of required laser frequencies.

Findings

Successfully trapped ^39 K using the new laser system

Demonstrated effective frequency doubling in a waveguide

System is compact and suitable for practical applications

Abstract

We demonstrate a compact laser source suitable for the trapping and cooling of potassium. By frequency doubling a fiber laser diode at 1534 nm in a waveguide, we produce 767 nm laser light. A current modulation of the diode allows to generate the two required frequencies for cooling in a simple and robust apparatus. We successfully used this laser source to trap ^39 K.