Optical fiber acousto-optic amplitude modulator
US4793676A · kind A · utility
21Cited by
5References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Dec 23, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0134
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fiber optic amplitude modulator couples light between two orthogonal polarization codes of a birefringent fiber. Dynamic coupling is caused by applying synchronized acoustic surface waves to the birefringent fiber in a direction normal to the fiber axis. A static biasing force is applied across the fiber to statically couple apparoximately 50% of the light input to one polarization mode into the other polarization mode. The additional force caused by the acoustic waves causes the fraction of coupled power to vary about the coupling caused by the static force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.