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.
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Arndt, V., Müller, H. and Dopheide, D., Comparison measurements for selection of suitable photodetectors for use in Nd:YAG LDA systems, Experiments in Fluids, 20 (1996), 460–465.
Bjarklev, A., Optical fiber amplifiers: Design and System Applications, (1993), Artech House, Boston and London.
Bergner, L. and Naqwi, A., A compact LDV system for high resolution flow measurements, Proc. of 9th Int. Symp. on Appl. of Laser Techniques to Fluid Mechanics 1998 (Lisbon, Portugal), (1998), 15.2.1–15.2.7.
Czarske, J. W., Plamann, K., Zelmer, H. and Tünnermann, A., Novel powerful acromatic laser Doppler anemometer using a diode-pumped double-clad fiber laser, Proc. of 7th Int. Conf. of Laser Anemometry — Advances and Applications 1997 (Karlsruhe, Germany), (1997), 59–66.
Desurvire, E., Erbium-doped fiber amplifiers, (1994), 167–174, John Wiley & Sons, New-York.
Digonnet, M. J. F., Rare earth doped fiber lasers and amplifiers, (1993), Marcel Dekker, New York.
Dopheide, D., Strunck, V. and Pfeifer, H.J., Miniaturized multicomponent laser Doppler anemometers using high-frequency pulsed diode lasers and new electronic signal acquisition systems, Experiments in Fluids, 9 (1990), 309–316.
France, P. W., Optical fibre lasers and amplifiers, (1991), Blackie and Sons, Glasgow and London.
Grosche, G., Müller, H., Strunck, V. and Dopheide, D., Powerful Laser-Doppler Anemometer for in-flight measurements, Conf. Proc. Int. Workshop on Flow Diagnosics Techniques 1998 (St. Petersburg, Russia), (1998).
Laming, R. I., Townsend, J. E., Payne, D. N., Meli, F., Grasso, G. and Tarbox, E. J., High-power Erbium-doped-fiber amplifiers operating in the saturated regime, Photonics Tech. Letters, 3 (1991), 253–255.
Laming, R. I., Zervas, M. N. and Payne, D. N., Erbium-doped fiber amplifier with 54 dB gain and 3,1 dB noise figure, Photonics Tech. Letters, 4 (1992), 1345–1347.
Müller, H. and Dopheide, D., Direction sensitive Doppler velocimeter using the optical frequency shift of two stabilized laser diodes, Proc. 5th Int. Conf. Laser Anemometry — Advances and Applications 1993 (Koenigshof, Netherland), (1993), 323–330.
Müller, H., Többen, H., Strunck, V. and Dopheide, D., Quadrature demodulation in novel frequency shift LDV systems as alternative for fringe biasing, in: LASER ANEMOMETRY 1995, Vol. 229, Fluids Engineering Division, (1995), The American Society of Mechanical Engineers, New York, 455–458.
Müller, H., Wang, H. and Dopheide, D., Fiber Optical Multi-component LDA-System using the Optical Frequency Difference of Powerful DBRLaser Diodes, Proc. of 8th Int. Symp. on Applications of Laser Techniques to Fluid Mechanics 1996 (Lisbon, Portugal), (1996a), 34.3.1–34.3.4.
Müller, H., Strunck, V. and Dopheide, D., The application of quadrature demodulation techniques for the investigation of flows, in: Flow Measurement and Instrumentation, 3–4 (1996), Special Issue: Optical Methods in Flow Measurement, (1996b), 237–245.
Müller, H. and Dopheide, D., Directional 2 W LDA System Applying MOPA Lasers, Proc. of 7th Int. Conf. Laser Anemometry—Advances and Applications, 1997 (Karlsruhe, Germany), (1997), 3–8.
Spectra Diode Labs (SDL), Data Sheets SDL-5760 series, 1 Watt cw single mode MOPA laser diode, (1993), San Jose, CA, USA.
Strunck, V., Müller, H., Grosche, G. and Dopheide, D., Aerosol size measurement using laser Doppler probe and acoustic excitation of the fluid flow, Conf. Proc. 9th Int. Symp. on Appl. of Laser Techniques to Fluid Mechanics 1998 (Lisbon, Portugal), (1998), 18.3.1–18.3.4.
Sudo, S., Optical fiber amplifiers: materials, devices and applications, (1997), Artech House, Boston and London.
Többen, H., Müller, H. and Dopheide, D., Power and Sensitivity Improvement of LDA-Systems by Fiber Amplifiers, Selected papers of 8th Int. Symp. on Appl. of Laser Techniques to Fluid Mechanics 1996, Springer-Verlag (1998a), 3–10.
Többen, H., Müller, H. and Dopheide, D., Optical preamplification of 1064 nm LDA radiation, Proc. of 9th Int. Symp. on Appl. of Laser Techniques to Fluid Mechanics 1998 (Lisbon, Portugal), (1998b), 15.4.1–15.4.5.
Wang, H., Strunck, V., Müller, H. and Dopheide, D., New technique for multi-component flow velocity measurements using a single HF-pulsed diode laser and a single photodetector, Experiments in Fluids, 18 (1994a), 36–40.
Wang, H., Müller, H., Strunck, V. and Dopheide, D., Experimental realization of a direction sensitive two-component LDA using frequencyshifted diode lasers, Proc. of 2nd Int. Conf. on Fluid Dynamic Measurements and its Applications 1994 (Beijing, China), (1994b), 126–129.
Wang, H., Strunck, V., Müller, H. and Dopheide, D., Direction Sensitive LDA Using a Single High-Frequency Pulsed Laser Diode and a Single Photodetector without Frequency Shifting, Selected papers of the 7th Int. Symp. on Appl. of Laser Techniques to Fluid Mechanics, (1996), Springer Verlag, 278–289.
Welch, D. F., Parke, R., Mehuys, D., Hardy A., Lang, R., O’Brien, S. and Scifres, S., 1.1 W diffraction-limited operation of a monolithically integrated flared-amplifier master oscillator power amplifier, Electron. Lett., 28 (1992), 2011–2013.
Zelmer, H., Tünnermann, A. and Welling, H., Faserlaser—kompakte Strahlquellen im nahinfraroten Spektralbereich, Laser und Optoelektronik, 4 (1997), 53–59.
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Dietrich Dopheide: He received his diploma degree in physics from the University of Göttingen, Germany, in 1974 and a doctoral degree in physics in 1977 and later for his habilitation work on "New semiconductor techniques for complex flows" the doctoral degree Dr.-Ing. habil. Since 1977 he is working at the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig in the field of flow measuring techniques. His interest was focussed to the application of laser sensor to fluid mechanics and flow rate measurements. In 1992 he was appointed as Director and Professor at the PTB and he is head of the Department for Fluid Mechanics.
Helmut Többen: He received his diploma degree in electrical engineering with the main areas in optical telecommunication and microwave techniques from the Technical University of Braunschweig, Germany, in 1988. Subsequently, he worked as scientist at the Institute of High Frequency Techniques at the TU Braunschweig in the fields of fiber fabrication and optical measuring techniques. In 1993 he received his doctoral degree after realizing new mid infrared fiber lasers. Since 1993 he is working as scientist in the Physikalisch-Technische Bundesanstalt, first in the Section of Fluid Flow Measuring Techniques and now in the Section of Liquid Meters.
Volker Strunck: He received his diploma degree in physics from the University of Göttingen, Germany, in 1977. In 1978 he attended a one year diploma course at the von Karman Institute in Belgium, then worked at University of Göttingen on micro-gravity material processing, at DLR on ’rocket exhaust flows’ and long range Doppler anemometry. He received the doctoral degree in 1987 for his thesis on turbulent wakes in fluid mechanics. Since 1987 he is working in the Section of Fluid Flow Measuring Techniques of Physikalisch-Technische Bundesanstalt (PTB) with special regard on optical sensors.
Gesine Grosche: She studied Natural Sciences at Trinity College, Cambridge (UK) and received her Bachelor of Arts degree in Physics and Theoretical Physics from the University of Cambridge in 1993, with extended projects in Applied Optics (experimental) and Solid State Physics (theoretical). She subsequently worked in Semiconductor Physics at Imperial College, London, and completed her PhD with a thesis on "Infrared Absorption due to gap and local vibrational modes in Gallium Phosphide" in 1997. Working at the PTB and the Technical University of Braunschweig her current interests include high power LDAs for in-flight measurements and Doppler Global velocimetry.
Harald Müller: He received his diploma degree in physics in 1983 and his doctoral degree in 1986 in applied physics at the University of Marburg/Germany. From 1986 to 1991 he was at the Institute of Engineering Metrology of the University of Hannover in the function of a chief engineer with special research interests in optical metrology, especially interferometry. Since joining the Physikalisch-Technische Bundesanstalt, in 1991 he has developed special laser Doppler anemometer techniques and is the head of the Section of Fluid Flow Measuring Techniques since 1994.
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Dopheide, D., Többen, H., Strunck, V. et al. Realization of high performance LDA-systems using optical amplifiers, high power semiconductor lasers and optical fiber lasers. J Vis 2, 281–292 (2000). https://doi.org/10.1007/BF03181444
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DOI: https://doi.org/10.1007/BF03181444