2-COMPONENT LDA USING OPTICAL MULTIPLEXING

The use of a Y-fed balanced bridge modulator is suggested as a means t o realize optical multiplexing in a dual beam laser Doppler anemometer . The resulting system measures two components of velocity but uses on ly one laser source, one photodetector and one signal processing elect ronic system. In this paper a laboratory system is described and verif ication experiments to investigate the performance of the system are p resented. Finally, suggestions are made for improving the system.