Patent ID: 7233608

Claim:
A frequency-stabilized laser source, characterized in that it comprises an optically-pumped solid state laser enabling a first laser beam to be emitted at frequency f 1 , an absorption cell containing an absorber chemical element, and which, in operation, has the first laser beam or a beam derived therefrom passing therethrough in such a manner that a transition (T) of the absorber chemical element is saturated, and locking means designed to lock the frequency f 1 of the first laser beam on said saturated transition (T) of the absorber chemical element, by means of synchronous detection based on modulating said transition (T), said locking means comprising a solenoid surrounding the absorption cell and powered so as to create an amplitude-modulated magnetic field, said locking means allowing the absorption signal generated by said absorber chemical element to be continuously modulated on the shifting range of the energy sub-levels of said absorber chemical element, such that the so emitted laser beam comprises only one spectral component with a stabilization precision which does not exceed 2 MHz.