Ring laser having amplitude and phase controlled externally injected back scatter
US4807998A · kind A · utility
4Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1986 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Mar 25, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/665
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A portion of each of the pair of counter-propagating laser beams in a ring laser cavity are extracted and redirected back into the cavity with servo controlled phase and amplitude. The phase and amplitude of one of the redirected beams is a function of a common first discriminant signal but independently controlled, and the phase and the amplitude of the second redirected beam is responsive to a second mutually exclusive discriminant signal and independently controlled. The redirected beams are such as to minimize the internal back scattering effects within the ring laser cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.