Fiber device having variable refractive index region proximal the core
US6111999A · kind A · utility
30Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Sep 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02033
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for changing the power levels of signals transmitted by an optical fiber, along with signal modulation and wavelength routing, comprises a length of optical fiber in which for a predetermined section of the length of the fiber, the fiber core is surrounded by a cladding having one or more variable refractive index (VRI) regions disposed therein in close proximity to the core. A grating region is disposed along the length of the fiber overlapping the VRI region. The VRI regions have an index of refraction lower than that of the core to change the effective index of the guided light and thereby define a tunable grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.