Laser Doppler velocimeter using the self-mixing effect of a semiconductor laser diode
- 1 May 1986
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 25 (9) , 1417-1419
- https://doi.org/10.1364/ao.25.001417
Abstract
A laser Doppler velocimeter (LDV) using a semiconductor laser diode (LD) with its self-mixing effect has been developed. A Doppler signal, caused by mixing a returned wave with an originally 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 and its spectral width of the LD. A LDV of this type is compact enough for many applications.Keywords
This publication has 6 references indexed in Scilit:
- Signal-to-noise in a backscatter-modulated Doppler velocimeterApplied Optics, 1984
- Laser Doppler velocimetry by modulating a CO_2 laser with backscattered lightApplied Optics, 1984
- Coherence characteristics of a single-mode GaAlAs laser diodeJournal of the Optical Society of America, 1981
- Self-coupled optical pickupOptics Communications, 1976
- A laser Doppler velocimeter employing the laser as a mixer-oscillatorJournal of Physics E: Scientific Instruments, 1968