Photon Correlation Techniques in Fluid Mechanics

Photon correlation is a kind of spectroscopy designed to identify optical frequency shifts and line-broadening effects in the range of many MHz down to a few Hz. The optical intensity is measured in terms of single photon­ detection events which result in current pulses at the output of photomulti­ plier tubes. This signal is processed in real time in a special-purpose paral­ lel processor known a...