Back to results
US 2006/0179888 A1Published application
Manufacture of optical fibers using enhanced doping
OwnerDavid Digiovanni, Robert Windelerinventors
Life of this patent
Estimating the term…
Abstract
Fluorine doping of trench layers in MCVD preforms is enhanced by exposing a silica soot layer, produced by MCVD, to a fluorine-containing gas at high pressure. The high pressure exposure is integrated into the MCVD process.
Claims10
Process for the manufacture of optical fibers comprising:
- (a) preparing an optical fiber preform,
- (b) heating the preform, and
- (c) drawing an optical fiber from the preform, the invention characterized in that the optical fiber preform is produced by:
- (i) forming by MCVD a soot layer of silica particles inside an MCVD tube,
- (ii) using sealing means and control means to maintain the pressure in the MCVD tube to a pressure in the range 1.0 to 10 atmospheres,
- (iii) introducing a dopant atmosphere at said pressure-,
- (iv) heating the soot layer to incorporate dopant into the silica particles,
- (v) heating the porous silica body to consolidate it into a solid glass layer, and
- (vi) collapsing the MCVD tube to produce the preform.
6 more elements
Dependencies are inferred from the claim text.