Abstract
We present a compact and frequency-stabilized laser head based on an extended-cavity diode laser. The laser head occupies a volume of 200cm3 and includes frequency stabilization to Doppler-free saturated absorption resonances on the hyperfine components of the Rb87D2 lines at 780 nm, obtained from a simple and compact spectroscopic setup using a 2cm3 vapor cell. The measured frequency stability is ⩽2×10−12 over integration times from 1 s to 1 day and shows the potential to reach 2×10−13 over 102−105 s. Compact laser sources with these performances are of great interest for applications in gas-cell atomic frequency standards, atomic magnetometers, interferometers and other instruments requiring stable and narrow-band optical sources.
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