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Interferometric wavelength meters have attained frequency resolutions down tothe MHz range. In particular, Fizeau interferometers, which have no movingparts, are becoming a popular tool for laser characterization andstabilization. In this article, we characterize such a wavelength meter usingan ultra-stable laser in terms of relative frequency instability$\sigma_y(\tau)$ and demonstrate that it can achieve a short-term instability$\sigma_y(1 s) \approx 2{\times}10^{-10}$ and a frequency drift of order $10$MHz/day. We use this apparatus to demonstrate frequency control of anear-infrared laser, where a frequency instability below $3{\times}10^{-10}$from 1 s to 2000 s is achieved. Such performance is for example adequate forions trapping and atoms cooling experiments.

Frequency stability of a wavelength meter and applications to laser frequency stabilization