The invention relates to a laser apparatus comprising a laser radiation source which generates pulsed laser radiation, wherein the laser radiation has spectral components in at least two wavelength ranges that differ from one another—a first wavelength range (W1) and a second wavelength range (W2)—, and comprising a dispersion control element comprising at least one dielectric multilayer mirror (MCM), wherein the laser radiation is reflected one or more times at the multilayer mirror (MCM). It is an object of the invention to provide a laser apparatus which is improved over the prior art. In particular, the setup thereof should be less complex, require less adjustment outlay and—in particular—be less sensitive to external influences. The invention achieves this object in that the multilayer mirror (MCM) is reflective in the two wavelength ranges (W1, W2), the reflection of the spectral component in the second wavelength range (W2) having a time delay in relation to the reflection of the spectral component in the first wavelength range (W1) such that the spectral components of the laser radiation reflected at the multilayer mirror (MCM) in the two wavelength ranges (W1, W2) coincide in time in an interaction centre of the laser apparatus. Moreover, the invention relates to a dielectric multilayer mirror and a method for generating laser radiation.