Fixed value fiber optic attenuator with index matching material
US5581649A · kind A · utility
9Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Apr 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fiber optic attenuator having a predetermined, fixed attenuation value and low back reflection properties across a broad wavelength spectrum is disclosed. Attenuation is achieved by providing an optical fiber pathway having an attenuation region which causes a predetermined signal loss. The medium defining the pathway is of a substantially constant index of refraction through the device to minimize or eliminate interference caused by Fresnel reflections. An index matching material surrounds the area of attenuation to eliminate or minimize modal or cladding noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.