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17 June 2008WDM optocommunication technology used for multipoint fibre vibrometry
The multichannel WDM (Wavelength Division Multiplexing) technique inspired the concept of vibration measurements
for many points of a vibrating object. The N-independent WDM separated 15XX nm fibre coupled laser diodes (used for
optical fibre telecommunication) form coherent system of sources for multipoint measurement of vibrations according to
the rule one wavelength - one point. The scattered light from the object coupled into the fibre, filtered coherently, after
special signal processing, allows analysing amplitudes and phases of many vibrating points in real time. Some
experiments and results of such system will be demonstrated.
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A. Waz, P. R. Kaczmarek, M. P. Nikodem, K. M. Abramski, "WDM optocommunication technology used for multipoint fibre vibrometry," Proc. SPIE 7098, Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 70980E (17 June 2008);