Optical waveguide manufacture

Details Optical waveguide manufacture Optical waveguide manufacture

1987-02-09

1988-09-20

Schor, Kenneth M.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 311, 65DIG16, 65900, C03B 37018, C03B 37014

Patent

active

047723025

ABSTRACT:
Optical waveguide having a fused silica core and a fluorine doped silica cladding is made by heating a cylinder of silica in fluorine, the cylinder initially having an outer annular particulate or porous region which is dried by the fluorine and into which fluorine diffuses to lower the refractive index of the silica when fused. The cylinder is made by depositing particulate silica onto a mandrel, drying the silica in chlorine, and heating the silica to densify it. Further particulate silica is deposited and is then heated in a fluorine-containing gas to dry, fluorine diffuse, and sinter the porous outer part of the silica. The resulting tubular silica preform is heated to collapse the tubular preform into a rod from which optical waveguide is drawn, the waveguide having a fluorine doped silica cladding. In one alternative the silica cylinder is made by depositing onto a mandrel a first layer of relatively dense silica followed by a second layer of less dense particulate silica so that fluorine diffuses preferentially into the lower density material. In another alternative, the silica cylinder is made by depositing particulate silica directly onto a high purity fused silica rod without using a mandrel, the deposited silica then being dried and subjected to fluorine diffusion.

REFERENCES:
patent: 822424 (1906-06-01), Bottomley
patent: 2364526 (1944-12-01), Hansell
patent: 3553413 (1971-01-01), Soulier
patent: 3933454 (1976-01-01), Deluca
patent: 4586943 (1986-05-01), Kyoto
patent: 4629485 (1986-12-01), Berkey
patent: 4643751 (1987-02-01), Abe

Affiliated with

Also associated with

Rating

Optical waveguide manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical waveguide manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical waveguide manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1746378