Fiber-optic Doppler velocimeter that incorporates active optical feedback from a diode laser
Abstract
A fiber-optic Doppler velocimeter that incorporates the effect of self-mixing in a diode laser is described. A theoretical model, based on self-mixing interference theory, is presented, and a simple experimental arrangement is constructed. The results of the experimental research are found to be in good agreement with the theoretical analysis. A Doppler velocity of as much as 3 m/s was measured directly, and a good linear relationship between the Doppler velocity and the Doppler-shifted frequency was obtained, which can be used to determine the speed of a moving object.
- Publication:
-
Optics Letters
- Pub Date:
- June 1992
- DOI:
- 10.1364/OL.17.000819
- Bibcode:
- 1992OptL...17..819W
- Keywords:
-
- Feedback;
- Fiber Optics;
- Laser Doppler Velocimeters;
- Semiconductor Lasers;
- Laser Cavities;
- Signal To Noise Ratios;
- Instrumentation and Photography;
- LASERS: SEMICONDUCTOR;
- SENSORS;
- FIBER SENSORS;
- VELOCIMETRY: LASER DOPPLER