Photon Doppler velocimetry (PDV) is a one-dimensional Fourier transform analysis of a heterodyne laser interferometry signal. It was developed at Lawrence Livermore National Laboratory by Strand. In recent years PDV has achieved popularity in the shock physics community as an adjunct or replacement for VISAR in the instrumentation of high-strain-rate events. Contemporary data acquisition technology and off-the-shelf optical telecommunications devices now leverage the assembly of these systems within reasonable budgets.
What are the advantages of Koheras lasers for PDV?
Koheras lasers offer ultra low noise, narrow linewidth and high frequency stability in a rugged industrial fiber format that are equally suited for field installations or laboratory work. Moreover, the multi channel needs of PDV is efficiently met by our ACOUSTIK multi-laser system that can integrate up to 16 laser in a single unit. The system can be fitted with multiplexers and splitters for maximum channel freedom and the individual laser channels can be changed by simply replacing the line-card style laser units.