Laser secure communications system
US4209689A · kind A · utility
28Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1969 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Jun 4, 1989 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/08059
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser secure communications system is disclosed. The system utilizes a long laser cavity, the end reflecting members of which may be located many kilometers apart. One or more high gain laser amplifiers optically aligned within the long laser cavity provide the optical carrier energy. Laser oscillation only occurs if the remotely located end reflectors are optically aligned and if the laser gain is sufficient to overcome the round trip transmission loss. The optical carrier thus established is modulated and detected at either end of the laser cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.