Intensity-based fibre-optic sensing system using contrast modulation of subcarrier interference pattern
Abstract
A novel technique to compensate for unwanted intensity losses in a fiber-optic sensing system is described. The technique involves a continuous sinusoidal modulation of the light source intensity at radio frequencies and an intensity sensor placed in an unbalanced interferometer. The system shows high sensitivity and stability.
- Publication:
-
Electronics Letters
- Pub Date:
- March 1989
- DOI:
- 10.1049/el:19890226
- Bibcode:
- 1989ElL....25..325A
- Keywords:
-
- Fiber Optics;
- Light Modulation;
- Optical Fibers;
- Optical Measuring Instruments;
- Sensors;
- Cost Reduction;
- Optical Paths;
- Signal Processing;
- Instrumentation and Photography