Deviation-free Bragg cell frequency-shifting
Abstract
A method is described of applying a variable frequency-shift to a laser beam, by means of Bragg cells, in which the direction of the output diffracted beam is unaffected by the magnitude of the applied shift. Applications of the technique to reference-beam and Doppler-difference forms of laser anemometry are discussed together with methods of obtaining increased dynamic range.
- Publication:
-
Applied Optics
- Pub Date:
- February 1981
- DOI:
- Bibcode:
- 1981ApOpt..20..588A
- Keywords:
-
- Acousto-Optics;
- Bragg Cells;
- Doppler Effect;
- Frequency Shift;
- Laser Anemometers;
- Laser Doppler Velocimeters;
- Wave Diffraction;
- Geometrical Optics;
- Light Beams;
- Light Modulation;
- Light Scattering;
- Optical Data Processing;
- Optical Scanners;
- Refracted Waves;
- Instrumentation and Photography;
- VELOCIMETRY: LASER DOPPLER