Bragg grating variable optical attenuator
US5699468A · kind A · utility
34Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Jun 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An attenuator capable of controllably attenuating at least two wavelengths of light is configured to have an optical waveguide section having at least two Bragg gratings disposed therein in series. The Bragg gratings have a sloped reflectivity response within a predetermined wavelength range. The sloped response is a function of refractive index variations within each of the grating elements. By compressing or expanding at least one of the gratings, the periodicity is modified so as to shift its central wavelength within a predetermined wavelength range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.