Method for making index-profiled optical device
US4620861A · kind A · utility
28Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1985 |
| Grant date | Nov 4, 1986 |
| Priority date | — |
| Expiry date | Nov 4, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Glass preforms for optical fibers or the like having refractive index profiles which vary in stepped or graded fashion across the preform, are made from porous glass preforms by introducing a first dopant into the porous preform during manufacture, partially sintering the preform to selectively modify the internal surface area thereof, introducing a second vapor-infusible dopant into the selectively sintered preform to cause selective doping of the porous glass, and then consolidating the resulting doped preform to clear glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.