Bichromatic Laser Doppler Velocity Vector Meter

The article considers the possibility of constructing laser Doppler velocity vector meters based on a bichromatic source of spatially combined Gaussian or Bessel beams, the two-wave single-channel Bragg acousto-optic modulator with a ratio of ultrasonic wave frequencies equal to the ratio of the wav...

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Bibliographic Details
Published in:Optoelectronics, instrumentation, and data processing instrumentation, and data processing, 2020-07, Vol.56 (4), p.333-339
Main Authors: Dubnishchev, Yu. N., Dubnishcheva, T. Ya, Nechaev, V. G.
Format: Article
Language:English
Subjects:
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
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Online Access:Get full text
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Summary:The article considers the possibility of constructing laser Doppler velocity vector meters based on a bichromatic source of spatially combined Gaussian or Bessel beams, the two-wave single-channel Bragg acousto-optic modulator with a ratio of ultrasonic wave frequencies equal to the ratio of the wave numbers of diffracted laser beams. The spatial, chromatic, and frequency structure of the 3D coordinate-measuring basis formed from the Gaussian or Bessel beams by the same sequence of optical elements and the photoelectric conversion adequate to the structure of light scattered by the investigated medium provide the minimum hardware Doppler spectrum width and increased noise immunity.
ISSN:8756-6990
1934-7944
DOI:10.3103/S8756699020040056