Relative Frequenzstabilitätsmessungen an Einmoden-Lasern

Abstract

The relative frequency stabilities and the modulation spectra of differently stabilized lasers are compared. The measurements were made by a Michelson interferometer with an internal optical de­lay line. For 6328 Å He - Ne-lasers stabilized by means of a Zeeman-absorption-cell and by the Lamb-dip-method frequency-standard-deviations of 1.3 × 105 and 9.0 × 105 Hz for observation times between 1 s and 20 s were measured. The frequency modulation spectra are composed of a low frequency noise part and many discrete frequencies, which can be related to the stabilization mechanism.