Method of making polarization retaining fiber with an elliptical

Details Method of making polarization retaining fiber with an elliptical Method of making polarization retaining fiber with an elliptical

1991-07-11

1992-09-22

Jones, W. Gary

Glass manufacturing

Processes

Forming product or preform from molten glass

65 312, 65 182, C03B 37023

Patent

active

051493497

ABSTRACT:
Disclosed is a method of making a polarization retaining single-mode optical fiber. There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio.

REFERENCES:
patent: 4395270 (1983-07-01), Blankenship
patent: 4493530 (1985-01-01), Kajioka
patent: 4561871 (1985-12-01), Berkey
patent: 4709986 (1987-12-01), Hicks
patent: 4859223 (1988-08-01), Kajioka
patent: 4978377 (1990-12-01), Brehm
Kingery et al., Introduction to ceramics, 1976, pp. 469-470, 501, John Wiley & Sons, ed.

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