Linien: A versatile, user-friendly, open-source FPGA-based tool for frequency stabilization and spectroscopy parameter optimization

We present a user-friendly and versatile tool for laser frequency stabilization. Its main focus is spectroscopy locking, but the software is suitable for lock-in techniques in general as well as bare PID operation. Besides allowing for sinusoidal modulation (up to 50 MHz), triangular ramp scanning,...

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Bibliographic Details
Published inarXiv.org
Main Authors Wiegand, Benjamin, Leykauf, Bastian, Jördens, Robert, Krutzik, Markus
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 15.06.2022
Subjects
Algorithms
Demodulation
Error analysis
Error signals
Field programmable gate arrays
Frequency stabilization
Graphical user interface
Locking
Machine learning
Optimization
Parameters
Physics - Atomic Physics
Physics - Instrumentation and Detectors
Power spectral density
Software
Spectrum analysis
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Summary:We present a user-friendly and versatile tool for laser frequency stabilization. Its main focus is spectroscopy locking, but the software is suitable for lock-in techniques in general as well as bare PID operation. Besides allowing for sinusoidal modulation (up to 50 MHz), triangular ramp scanning, IQ demodulation (1 \(f\) to 5 \(f\)), IIR and PID filtering, Linien features two different algorithms for automatic lock point selection; one of them performs time-critical tasks completely on FPGA. Linien is capable of autonomously optimizing spectroscopy parameters by means of machine learning and can measure the error signal's power spectral density. The software is built in a modular way, providing both a graphical user interface as well as a Python scripting interface. It is based on the RedPitaya STEMLab platform but may be ported to different systems.
ISSN:2331-8422
DOI:10.48550/arxiv.2203.02947