Jw. Czarske et H. Muller, 2-DIMENSIONAL DIRECTIONAL FIBEROPTIC LASER-DOPPLER ANEMOMETER BASED ON HETERODYNING BY MEANS OF A CHIRP FREQUENCY-MODULATED ND-YAG MINIATURE RING LASER, Optics communications, 132(5-6), 1996, pp. 421-426
A novel method for directional multicomponent laser Doppler anemometry
, based on the generation of different carrier frequencies, one for ea
ch velocity component, is presented. The laser frequency modulation in
conjunction with fiber delay lines of different lengths generates the
carrier frequencies without involving additional frequency shift elem
ents, so that a simplified laser Doppler anemometer can be realized.