A monobeam laser Doppler velocimeter that permits continuous recovery of the flow velocity profile along the beam is described. The scheme applies the coherence-multiplexing concept to backscattering Doppler detection. A theoretical analysis of the distributed velocimeter is given, along with a description of an experiment with a superluminescent diode source inserted in an all-fiber-optic scheme. The velocity profile of water flow in a duct is reported. The results confirm the exceptional capabilities offered by this velocimeter in experimental fluid mechanics.
© 1991 Optical Society of America
Original Manuscript: June 5, 1991
Published: September 1, 1991
Valeria Gusmeroli and Mario Martinelli, "Distributed laser Doppler velocimeter," Opt. Lett. 16, 1358-1360 (1991)