Optical modulation device
US4306142A · kind A · utility
7Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1979 |
| Grant date | Dec 15, 1981 |
| Priority date | — |
| Expiry date | Nov 20, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0123
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosed device comprises two duty ratio detectors for detecting respective duty ratios of an input modulation signal modulating an incoming light beam and a modulated intensity-of-light signal proportional to an intensity of an outgoing light beam, a differential amplifier for producing a difference between both duty ratios, and a bias control for supplying this difference to an optical modulator through a bias amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.