METHOD OF MANUFACTURE OF THE BILLET OF THE OPTICAL FIBERS (VARIANTS) Russian patent published in 2007 - IPC C03B37/18 

FIELD: glass industry; other industries; methods and the devices of production of the optical fibers.

SUBSTANCE: the invention presents the method and the device for manufacture of the billet of the optical fiber with usage of the simultaneous plasma deposition on the internal and external surfaces of the initial tube. At rotation of the initial tubular element conduct the selective injection of the chemicals in the plasma torch and the chemicals flowing through the cavity of the tube. The plasma torch is moved along the tubular element for the simultaneous deposition of the carbon-black on the internal and external surfaces. The carbon-black on one or both surfaces can be condensed into the layer of quartz glass after its deposition. Then the plasma torch again is moved for deposition of the additional carbon-black and-or for consolidation of the before deposited carbon-black on one or both surfaces. The process is repeated until enough silicon dioxide is deposited on the tubular element. After that the tubular element is flattened. The additional plasma deposition can be made during this flattening or after it. The technical problem of the invention is to increase productivity at production of the billets of the optical fibers and the fibers of the big diameter.

EFFECT: the invention ensures the increased productivity at production of the billets of the optical fibers and the fibers of the big diameter.

35 cl, 7 dwg