[en] During the past years Laser-Doppler Velocimetry (LDV) became a powerful tool measuring instantaneous velocities in flows without disturbing the flow field. The extension of single component LDV-Systems to two or three velocity components measured simultaneously, provided theoreticians with experimental information to refine the understanding of turbulence. The measurement of velocity components simultaneously at the same location meant a breakthrough in turbulence research. It was now possible to derive from these experimental values quantities representing turbulent transport. Laser-Doppler systems presently measure local velocity values. Turbulence, however, is a phenomenon which depends on the behavior of the whole flow field, therefore instantaneous velocity information of the vicinity of the location of interest is needed. This leads to the requirement of flow field mapping to determine flow direction and strength time resolved at different location simultaneously. The development and application of an instrument is presented, which measures simultaneously one velocity components along a line in a flow. The instrument adds to the measureable turbulent quantities, the dissipation rate of turbulence energy, a quantity frequently used in turbulence modeling