公开(公告)号：DE3101999A1

公开(公告)日：1981-11-26

申请号：DE3101999

申请日：1981-01-22

Applicant: AGENCY IND SCIENCE TECHN

Inventor： SAKURAGI SHIRO ,  KOTANI HARUO

IPC: A61B18/20 ,  B29C47/00 ,  C03B23/049 ,  C03B37/012 ,  C03B37/023 ,  C03B37/027 ,  C03C13/04 ,  G02B6/00 ,  G02B6/02 ,  G02B6/10 ,  G02B5/14

Abstract: A preform is prepared to comprise a step index structure consisting of a core and a clad both made of metal halogenides or arsenic-selenium glass sparingly capable of transmitting infrared light of long wavelength and a layer of lubricant applied to the outer surface of the clad. The preform is set inside a metal cylinder. By pulling this metal cylinder through a plurality of dies containing orifices of successively decreased diameters at a temperature below the melting point, the preform can be elongated into an optical fiber of a prescribed diameter. The optical fiber thus produced is capable of transmitting infrared light of high power with a small loss. Protected and reinforced by the metal cylinder jacket, this fiber enjoys high mechanical strength.