Request InfoMartin, Froeschner & AssociatesMartin, Froeschner & Associates has announced an all-fiber Doppler velocity interferometer system for any reflector. It has no mirrors, lenses, etalons or free-space beams, and it can detect Doppler shifts in light reflected from moving surfaces and the velocity of the surface to absolute accuracies of 0.1% with subnanosecond resolution. 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