Process for Making Optical Fibers from Core and Cladding Glass Rods
Patent, Filed 12 Aug 96, patented 9 Mar 99
DEPARTMENT OF THE NAVY WASHINGTON DC
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A coreclad glass optical fiber is made by melting a core glass rod and a cladding glass rod in separate crucibles which are not intersecting with respect to each other and the respective core and cladding glass melts passed out of contact with each other to a glass melt contacting zone proximate a fiber drawing orifice in which the cladding glass surrounds the core glass and a coreclad glass fiber is drawn. This process enables the clad glass fiber to be drawn directly from core and cladding glass rods without the need for a preform or forming a melt from glass chards or chunks, thereby reducing the cost of producing the fiber and also producing a glass clad optical fiber of high purity and excellent concentricity. Chalcogenide glass fibers having a concentricity of 100 have been made.
- Fiber Optics and Integrated Optics