The present disclosure relates to a device (500) for distance measurement for a laser processing system (100). The device (500) comprises a light source (510), which is designed to produce a primary beam for directing at a workpiece (1), at least one detection device (520), which is designed to detect a secondary beam reflected by the workpiece (1), at least one optical amplifier (530), which is designed to amplify the primary beam and/or the secondary beam, and an evaluation unit, which is designed to evaluate interference of spectral components in the frequency range.
