Abstract
We present our study on enhancement and optimization of potassium-40 () atomic beam flux from a two-dimensional magneto-optical trap (2D MOT) by modulating the frequency of cooling laser. The laser cooling beam frequencies of the 2D MOT were effectively broadened via electro-optical modulators at 10 MHz, with a modulation index ranging from to 7, depending on the laser intensity. Laser parameters of the 2D MOT beams and the magnetic field gradient were scanned for optimal settings for maximum atomic beam flux. When compared to a conventional 2D MOT with fixed laser frequencies, we were able to obtain a 3.7 times enhancement of the atomic flux when the total laser power was 640 mW. Numerical calculations predict further improvement for higher laser beam intensities.
© 2017 Optical Society of America
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