Laser Doppler velocimeter based on the self-mixing effect in a fiber-coupled semiconductor laser: theory
- PMID: 20725303
- DOI: 10.1364/AO.31.003401
Laser Doppler velocimeter based on the self-mixing effect in a fiber-coupled semiconductor laser: theory
Abstract
A laser Doppler velocimeter that consists of a semiconductor laser coupled to a fiber and that uses the self-mixing effect is presented. The velocimeter can be used for solids and fluids. A theoretical model is developed to describe the self-mixing signals as a function of the amount of feedback into the laser and the distance from the laser to the moving object. Good agreement is found between this theory and measurements.
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