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Miniature laser frequency stabilization module for cold atom sensing
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DOI：10.3788/COL202422.101302.png)
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Abstract
En 中文
In this study, a miniature laser frequency stabilization module for cold atom sensing applications was designed and realized. The module can lock the laser frequency to the saturated absorption spectrum of the D2 line of rubidium (Rb) atoms using the frequency modulation spectroscopy method. The module core is a tiny Rb cell, co-packaged with the saturation absorption optical setup, temperature control circuit, and detection circuit through a joint optical-mechanical-electrical design for a total volume of only 40 mm x 15 mm x 30 mm. The frequency fluctuation of the 780 nm laser after frequency stabilization by the module was within 1 MHz over 1000 s, which is adequate for magneto-optical trap experiments. The results verify the feasibility of the module as a frequency reference and provide a light source for portable cold atom sensing devices.
Keywords:
frequency stabilization
miniaturization
cold atoms
saturation absorption spectrum
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