Citation:
Z.H. Lu, T.O.H. Charrett, H.D. Ford, R.P. Tatam. 3D planar velocity measurements, using Mach-Zehnder interferometric-filter-based
planar Doppler velocimetry (MZI-PDV) and imaging fibre bundles. 19th International Conference on Optical Fibre Sensors, edited by David Sampson, Stephen Collins, Kyunghwan Oh,
Ryozo Yamauchi, Proc. of SPIE Vol. 7004, 70040I, April 2008.
Abstract:
Three component planar flow-field measurements are made using imaging fibre
bundles to port different views of the measurement plane, defined by a laser
light sheet, to a single imaging head. The Doppler frequency shifts of light
scattered by particles entrained in the flow are transduced to intensity
variations using a Mach-Zehnder interferometric filter. The free spectral range
of the filter can be selected by adjusting the optical path difference of the
interferometer. This allows the velocity measurement range, sensitivity and
resolution to be varied. Any laser wavelength may be used. A phase locking
system has been designed to stabilise the interferometric filter.
