Method of making optical fiber preform
US4507135A · kind A · utility
4Cited by
11References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1982 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Aug 2, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/018
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Various CVD processes are known whereby glass particles are flowed toward or over a substrate on which they are to be deposited. Because the substrate is cooler than the stream in which the particles are flowing, the thermophoretic force directs the particles toward the substrate. In accordance with the invention a beam of laser light is propagated over the surface in the vicinity of the stream of particles. The particles and/or a component within the stream absorbs the laser energy to induce within the stream of particles a temperature gradient whereby temperature increases with increased distance from the substrate surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.