Laser frequency offset locking scheme for high-field imaging of cold atoms

Details Laser frequency offset locking scheme for high-field imaging of cold atoms Laser frequency offset locking scheme for high-field imaging of cold atoms

2011-08-30

arxiv.org/abs/1108.6045v4

Physics

Instrumentation and Detectors

5 Pages, 7 Figures

Scientific paper

We present a simple and flexible frequency offset locking scheme developed for high-field imaging of ultra-cold atoms which relies on commercially available RF electronics only. The main new ingredient is the use of the sharp amplitude response of a home-made RF filter to provide an error signal for locking the lasers. We were able to offset lock two independent diode lasers within a capture range of 200 MHz, and with a tuning range of up to 1.4GHz. The beat-note residual fluctuations for offset locked lasers are below 2MHz for integration times of several hundreds of seconds.

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