Methods of making optical fiber and products produced thereby

Details Methods of making optical fiber and products produced thereby Methods of making optical fiber and products produced thereby

1989-09-19

1990-06-12

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

350 9631, 427163, C03B 37018

Patent

active

049329901

ABSTRACT:
An improved multimode optical fiber having substantially higher bandwidth and lower loss is made by controlling process parameters such as the volume of the silica which is deposited in each pass of a torch assembly (41) along a substrate tube (31) to form a preform tube which is collapsed to provide a preform (80) from which the optical fiber is drawn. As a result, the amplitude variation of the refractive index across each layer is controlled to be within desired limits. Should the volume of the silica deposited in each pass be controlled to control the amplitude variation, the thicknesses of the outermost deposited glassy layers in the preform tube are greater and those of the innermost layers are less than those of layers in a preform tube made by prior art MCVD processes. Because the difference in the index of refraction across each glassy layer is reduced, the bandwidth is enhanced and the loss of the drawn optical fiber is reduced over those properties of optical fiber drawn from preforms made by prior art MCVD processes. Inasmuch as the inventive process also allows a higher deposition rate than before, it may be used to produce single-mode optical fiber at lower costs than before achieved.

REFERENCES:
patent: 405198 (1877-08-01), Rau et al.
patent: 3982916 (1976-09-01), Miller
patent: 4087266 (1978-05-01), Irven et al.
patent: 4217027 (1980-08-01), MacChesney et al.
patent: 4257797 (1981-03-01), Andrejco et al.
patent: 4389229 (1985-06-01), Jang et al.
patent: 4389230 (1983-06-01), Modone et al.
patent: 4478623 (1984-10-01), Olshasky
patent: 4518407 (1985-05-01), Black et al.
patent: 4579571 (1986-01-01), Hicks
patent: 4596589 (1986-06-01), Perry
Applied Optics, "Pulse Brodening Caused By Deviations From The Optimal Index Profile", R. Olshansky, vol. 15, No. 3, Mar. 1976.
Applied Optics, "Effects of Profile Deformations on Fiber Bandwidth", D. Marcuse et al., vol. 18, No. 22, 15 Nov. 1979.
Applied Optics, "Calculated Pulse Responses of Perturbed Fiber Profiles", B. Stoltz et al., vol. 21, No. 23, 1 Dec. 1982.

Affiliated with

Also associated with

Rating

Methods of making optical fiber and products produced thereby does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods of making optical fiber and products produced thereby, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods of making optical fiber and products produced thereby will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-614883