Abstract
Conventional directional LDAs are based on the frequency shifting technique. In this paper a technique has been proposed for the realization of a direction sensitive HF-pulsed LDA on the basis of switch demultiplexing and quadrature signal processing. This technique allows one to take advantage of HF-pulsed LDAs and to use only one high-frequency pulsed laser diode and one detector for directional flow velocity measurements without frequency shifting. The first experimental verification of this technique has been made. Improvements to the experimental set-up and practical miniaturized realizations of a directional HF-pulsed LDA using light fibres and integrated optical devices are described.
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Wang, H., Müller, H., Strunck, V., Dopheide, D. (1996). Direction Sensitive LDA Using a Single High-Frequency Pulsed Laser Diode And a Single Photodetector Without Frequency Shifting. In: Adrian, R.J., Durão, D.F.G., Durst, F., Heitor, M.V., Maeda, M., Whitelaw, J.H. (eds) Developments in Laser Techniques and Applications to Fluid Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-79965-5_18
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DOI: https://doi.org/10.1007/978-3-642-79965-5_18
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