In this paper,the laser frequency stabilization hardware system is built using an industrial computer,NI data acquisition card and peripheral optical path,and a set of digital frequency stabilization control software for single-fre-quency fiber laser is developed using Lab VIEW FPGA.Based on the servo control signal generated by the modulated transfer spectrum,the 780 nm laser frequency is locked to the ultrafine jump spectral line of rubidium atoms by acqui-ring the error signal and controlling the piezoelectric ceramic expansion and contraction after PI processing.Allan vari-ance results demonstrate that a short-term frequency stability precision of 1.52 × 10-11@10 s,and the long-term sta-bility is better than 1.56 × 10-11@100000 s,with continuous operation for over 20 days.This digital frequency stabili-zation software employs a graphical programming language,which significantly reduces development cycles,presenting an intuitive and concise user interface for convenient analysis and processing.It has been successfully applied to the rubidium 87 fountain clock system and possesses versatility for applications in precision measurement fields such as a-tomic interferometers and laser gyroscopes.
关键词
单频光纤激光器/调制转移光谱/LabVIEW/FPGA/数据采集卡/数字稳频
Key words
single-frequency fiber laser/modulation transfer spectroscopy/LabVIEW FPGA/data acquisition card/dig-ital frequency stabilization
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