Method of making polarization retaining fiber

Details Method of making polarization retaining fiber Method of making polarization retaining fiber

C - Chemistry, Metallurgy

03

B

C03B 37/027 (2006.01) C03B 37/012 (2006.01) C03B 37/014 (2006.01)

Patent

CA 2060016

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.

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