FORMING METHOD FOR FIBER BUNDING TERMINAL PART

摘要

PURPOSE:To obtain a fiber bundle terminal part being excellent in its airtightness by arranging lamellately terminal parts of optical fibers allowing molten low melting point glass to adhere and solidifying it, immersing it into the low melting point molten glass, reducing it by a sleeve-like jig and focusing and welding it. CONSTITUTION:A heat resisting sheet 2 is stuck to a drum 1, and on said sheet, low melting point glass fibers 3 are arranged in parallel to the axial direction, and both ends are tacked by a sheet 4. This drum 1 is set to a wire drawing device, and an optical fiber 6 is wound through a guide reel 5. Subsequently, when an intersection of the fibers 6, 3 is heated locally and cooled, a fiber 6a part is fixed lamellately. Next, a fixed part 6a is cut. Thereafter, such a fiber 6 is focused by using a jig 10, and a fiber bundle 9 is obtained. To the end parts 8 of the bundle 9, low melting point glass 14 is welded in a pot metal tank, and thereafter, it is drawn up and cooled and solidified. In such a way, a fiber bundle terminal part being excellent in its airtightness is obtained.