| 摘要 |
PURPOSE:In preparing a parent material for optical fiber, to prepare the high- quality parent material, by destaticizing one or more of preform rods, a glass tube, and a glass material. CONSTITUTION:The ends of the preform rods 1a and 1b having glass layers for core are supported by the supporting member 3, and set in the desired position in the radius direction of the quartz type glass tube 2. One end of the tube 2 is melted and sealed under heating by oxyhydrogen flame, etc., the surface of the inner part of the tube 2 from the other open end, etc. are treated with hydrofluoric acid, washed and dried. An ionized gas (air) is jetted to the rods 1a and 1b and the tube 2, static electricity is approximately completely removed, and the glass material 4 for cladding are packed into the space between the tube 2 and the rods 1a and 1b. In the operation, the glass material 4 is also destaticized similarly and packed, to give the synthetic rod 5. The rod 5 is melted and integrated to give a parent material for optical fiber. |
