Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – Process of manufacturing optical fibers – waveguides – or...
Patent
1996-03-05
1999-09-28
Chin, Peter
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
Process of manufacturing optical fibers, waveguides, or...
65389, 65404, 65412, 65435, C03B 37023, C03B 37075, C03B 1800, C03B 3702
Patent
active
059581034
ABSTRACT:
A process for producing a preform for a chalcogenide glass fiber which comprises inserting a cladding tube having contained therein a chalcogenide glass rod for core into a quartz tube having at its bottom a nozzle having an aperture smaller than the outer diameter of the cladding tube, locally heating the bottom of the quartz tube and pulling the cladding tube having contained the glass rod for core and a process for producing a chalcogenide glass fiber by heating and drawing the preform thus obtained, by which processes the devitrification of glass and the generation of bubbles in the core glass or at the core glass-cladding glass interface can be prevented and the adhesion between the core glass and the cladding glass can be improved. In particular, when the glass material for core does not contain Ge, a chalcogenide glass fiber having such a core-cladding structure that the transmission loss of the glass fiber when infrared light pass through the fiber is small and the mechanical strength is high.
REFERENCES:
patent: 3754879 (1973-08-01), Phaneuf
patent: 4372767 (1983-02-01), Maklad
patent: 4908053 (1990-03-01), Nishii et al.
Morimoto Shozo
Yamashita Toshiharu
Yoneda Yoshitaka
Chin Peter
Hoya Corporation
Nippon Sheet Glass Company Limited
Ruller Jacqueline A.
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