1. An opto-electronic distance measuring device, comprising: a transmitting unit having a driver stage for a light source for emitting optical pulses as pulsed-mode-intensity-modulated optical radiation, a receiving unit for receiving a portion of the optical radiation, said portion being reflected from a target object, and converting it into an electrical reception signal, by means of a photosensitive electrical component, an analogue-digital converter for digitizing the reception signal, and an electronic evaluation unit which is configured such that a distance from the target object can be ascertained on the basis of a signal propagation time using the digitized reception signal, wherein the electronic evaluation unit is configured such that the setting of the pulse duration is taken as a basis for using configurable filter to set a bandwidth for the reception signal, wherein the driver stage is configured such that at least two pulse durations of different length for the optical pulses can be set, and wherein extension of the pulse duration allows expansion of a distance measurement range, as a maximum ascertainable distance, to be achieved.