Realization of High Performance LDA-systems using Optical Amplifiers, High Power Semiconductor Lasers and Optical Fiber Lasers

Issue title: International Conference on Optical Technology and Image Processing in Fluid, Thermal, and Combustion Flow, Yokohama, Japan, December 1998

Article type: Research Article

Authors: Dopheide, D. | Többen, H. | Strunck, V. | Grosche, G. | Müller, H.

Affiliations: Physikalisch-Technische Bundesanstalt, Department for Fluid Mechanics, Bundesallee 100, D-38116 Braunschweig, Germany. e-Mail: [email protected] Internet: http://www.ptb.de/english/org/1/13/hp.htm

Abstract: Advanced novel techniques for sophisticated LDA applications are presented in this paper. By applying laser sources with high output powers like MOPA-lasers (master oscillator power amplifier), fiber lasers and booster fiber amplifiers to increase the laser power in the measuring volume and by amplifying the scattered light power with optical fiber preamplifiers to increase the sensitivity of the receiving units, the signal-to-noise-ratio of laser Doppler signals is drastically improved and the overall performance of a laser Doppler anemometer is significantly enhanced.

Keywords: novel LDA-techniques, semiconductor laser LDA, optical amplifiers, fibre amplifier LDA, fibre laser LDA

Journal: Journal of Visualization, vol. 2, no. 3-4, pp. 281-292, 2000