The effect of acoustic noise on optical fibre based laser Doppler velocimetry systems
The effect of acoustic noise on optical fibre based laser Doppler velocimetry systems
The potentially serious problem of acoustic noise pick-up in fibre-based LDV systems is addressed both theoretically and experimentally. A new broadening mechanism, called phase noise broadening, is discussed and the magnitude of this effect is estimated for typical LDV systems. This broadening leads to an overestimate of the turbulence index which is more serious for low speed flows. In a representative situation the magnitude of the error in the turbulence index is of the order of 5%.
Pannell, C.N.
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Jones, J.D.C.
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Jackson, D.A.
96d434a6-8a01-4702-ab8f-3174bf6f348e
1992
Pannell, C.N.
002fadf4-f97e-4732-b171-73ed7563ee18
Jones, J.D.C.
c757c6f0-7f06-44a7-8130-7865ed565b6b
Jackson, D.A.
96d434a6-8a01-4702-ab8f-3174bf6f348e
Pannell, C.N., Jones, J.D.C. and Jackson, D.A.
(1992)
The effect of acoustic noise on optical fibre based laser Doppler velocimetry systems.
6th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisboa, Portugal.
20 - 23 Jul 1992.
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Conference or Workshop Item
(Paper)
Abstract
The potentially serious problem of acoustic noise pick-up in fibre-based LDV systems is addressed both theoretically and experimentally. A new broadening mechanism, called phase noise broadening, is discussed and the magnitude of this effect is estimated for typical LDV systems. This broadening leads to an overestimate of the turbulence index which is more serious for low speed flows. In a representative situation the magnitude of the error in the turbulence index is of the order of 5%.
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Published date: 1992
Venue - Dates:
6th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisboa, Portugal, 1992-07-20 - 1992-07-23
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Local EPrints ID: 77346
URI: http://eprints.soton.ac.uk/id/eprint/77346
PURE UUID: a2f04d99-1c19-4556-bcb9-106057361d00
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Date deposited: 11 Mar 2010
Last modified: 13 Mar 2024 23:50
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Contributors
Author:
C.N. Pannell
Author:
J.D.C. Jones
Author:
D.A. Jackson
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