Multimode-optical-fiber Michelson interferometer
Abstract
A multimode-optical-fiber Michelson interferometer is constructed by utilizing a fiber-optic directional coupler as a beam-splitting/recombining element, and is used to measure an amplitude of sinusoidal vibration in a homodyne detection scheme. The mixing efficiency in interferometry is discussed on a simplified assumption of the propagating field and related to the number of speckles received by a photodetector. In order to achieve a considerable S/N in the beat photocurrent, the aperture to limit the number of speckles should be as small as a few percent of the radiation pattern in area. Theoretical considerations are followed by experiments.
- Publication:
-
Journal of Lightwave Technology
- Pub Date:
- March 1983
- DOI:
- 10.1109/JLT.1983.1072107
- Bibcode:
- 1983JLwT....1...75I
- Keywords:
-
- Fiber Optics;
- Michelson Interferometers;
- Optical Heterodyning;
- Propagation Modes;
- Signal Mixing;
- Transmission Efficiency;
- Beam Splitters;
- Beat Frequencies;
- Homodyne Reception;
- Optical Coupling;
- Optical Fibers;
- Fluid Mechanics and Heat Transfer;
- COUPLERS;
- INTERFEROMETERS;
- HOMODYNING;
- FIBER APPLICATIONS