Manufacture of image fiber

Abstract

Abstract PURPOSE:To prevent the generation of foams during fusion and wire drawing by heating organic impurities existing on the surface of optical fibers and a jacket pipe after inserting numbers of optical fibers into the glass-made jacket, and removing them through hydrogenation and oxidation successively. CONSTITUTION:Numbers of optical fibers 1 are packed lengthwise in a jacket 3 made of glass to form a jacket fiber group 3. To remove organic contaminating materials sticking strongly to surfaces of the optical fibers 1 and jacket pipe 3, the jacket 3 is filled with gaseous H2 and then heated at >=100 deg.C for hydrogenation to produce H2O, which is discharged by producing a vacuum. Then, gaseous O2 is introduced and heat oxidation is carried out to obtain gaseous CO2, thus removing all organic materials. Further, after O2 is substituted by inert gas, they are united by deposition under a vacuum and wire drawing is carried out to obtain a foam-free image fiber.

Inventors

• 👤 Tsugio Sato
• 👤 継男 佐藤
• 👤 Wataru Komatsu
• 👤 亘 小松
• 👤 Seiji Shibuya
• 👤 渋谷　晟二

Bibliographic Details