A method for the frequency stabilization of a laser with the aid of the acousto-optical - optical modulation and a device for the frequency stabilization of a laser with the aid of the acousto-optical - optical modulation

摘要

A method for the frequency stabilization of a laser beam emitted by a laser, in which a laser beam that is emitted by a laser predeterminable frequency of an acousto-optical - optical modulation is subjected to, the intensities of the frequency-modulated partial beams are determined and, on the basis of the intensity differences an error signal is determined on the basis of which the laser frequency is corrected, wherein in the case of the acousto-optical - optical modulation two side bands are produced, which are arranged symmetrically with respect to the fundamental frequency of the laser beam in both directions about the modulation frequency are frequency, the side bands at least partially of a frequency-selective absorption cell (8) are supplied, in which the side bands are absorbed to different extents as a function of frequency, and then the radical intensity of the sidebands is determined, characterized in that the two side bands in each case into two partial beams are split, in particular, the same intensity, wherein the first partial beams of the absorption cell (8) and then supplied to the radical intensities of the partial beams of the side bands are determined, while the intensity of the second partial beams of the sidebands without passing through the absorption cell (8) is determined, and wherein to..