Aarhus Universitets segl

FPGA lock

A simple laser locking system based on a field-programmable gate array

Modern quantum gas labs require a number of laser systems which are typically difficult to construct or expensive to buy commercially. We have developed a laser frequency stabilization system based on a field-programmable gate array, with emphasis on hardware simplicity, which offers a user-friendly alternative to commercial and previous home-built solutions. Frequency modulation, lock-in detection and a proportional-integral-derivative controller are programmed on the field-programmable gate array and only minimal additional components are required to frequency stabilize a laser. The locking system is administered via LabVIEW from a host-computer which provides comprehensive, long-distance control through a versatile interface. The source code is available online.

The manuscript on this work is published in Review of Scientific Instruments and is available on arXiv. On this page, the orignal source code is provided and an upgraded version will be made available at a later stage.