In this paper a laser Doppler velocimetry (LDV) experiment with a water flow is performed to show that the experimental results for the Fourier transform of the two-photon time-interval probability $Q_F$(ν) agree with the theoretical results derived in previous papers. The conclusions of these papers can therefore be applied to a real LDV experiment. It is concluded that by using this technique for small scattered intensities the velocities can be obtained with much more accuracy than by measuring the autocorrelation function $g^{\mathrm{}\left(2\right)\mathrm{}}$(τ). The values of the intensity and of the Doppler frequencies that can be used are discussed.

• Received 7 December 1988

DOI:https://doi.org/10.1103/PhysRevA.40.362