Frequency stability measurement on magnetic Lamb dip-stabilised lasers

Abstract

Compact Zeeman lasers have been built to test the frequency stability which can be obtained using the magnetic Lamb dip. The lasers are strictly monomode. No frequency modulation is needed, the error function resulting from a Zeeman modulation of the sigma components of the laser line for a fixed laser frequency. Frequency fluctuations of better than 10-11 are obtained by Allan variance analysis for the integration period range of 0.1-100 s.