Laser Doppler velocimeter using the self-mixing effect of a semiconductor laser diode
Abstract
A laser Doppler velocimeter (LDV) using a semiconductor laser diode (LD) with the self-mixing effect has been developed. A Doppler signal, caused by mixing a returned wave with an existing wave inside the LD, is detected with a photodetector in the LD package; it is also picked up from the variation of the LD driving voltage. When the returned light is weak enough, it confirms that there is no change in the single-mode oscillation of the LD. An LDV of this type is compact enough for many applications.
- Publication:
-
Applied Optics
- Pub Date:
- May 1986
- DOI:
- 10.1364/AO.25.001417
- Bibcode:
- 1986ApOpt..25.1417S
- Keywords:
-
- Laser Doppler Velocimeters;
- Semiconductor Lasers;
- Signal Detection;
- Signal Mixing;
- Laser Modes;
- Luminous Intensity;
- Photometers;
- Spectral Line Width;
- Spectrum Analysis;
- Instrumentation and Photography;
- VELOCIMETRY: LASER DOPPLER;
- LASERS: SEMICONDUCTOR