Method and apparatus for optical beam power attenuation
US6711340B2 · kind B2 · utility
10Cited by
5References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Mar 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/3594
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods and apparatus are provided for the closed loop attenuation of optical beam power in a multiple-axis free-space-coupled single-mode fiber-optic transmission system. In a specific embodiment involving two tip-tilt mirrors to couple optical power from an input fiber to an output fiber, the four mirror axes arc actuated in such a way as to produce either a static or time-varying set of induced mirror angles that yield a desired time history of optical loss. The attenuation technique uses the DC level of the measured output power to adjust the amplitude of the induced mirror angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.