Device for memory-storage of a coherent image in a multitude optical cavity
US4586779A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1983 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | May 24, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/0541
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Device for memory-storage of a coherent image in a multimode optical cavity. A coherent light source generates a signal wave and a reference wave and provides these waves to optical guiding devices. These optical guiding devices form a closed loop in which the signal wave circulates. The guiding devices form a multimode optical cavity having a Fourier plane. An amplifying interactive medium is disposed within the cavity on the path of the signal wave and at the Fourier plane. Within the interactive medium, the signal wave interferes with the reference wave in order to create a diffraction grating. Each signal wave thus receives energy from the reference wave with which it interferes. A semi-transparent beam splitter is disposed within the cavity on the path of the signal wave in order to extract a portion of the energy from the optical cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.