C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 13/02 (2006.01) C03B 37/012 (2006.01) C03B 37/023 (2006.01) C03C 3/32 (2006.01) C03C 6/06 (2006.01) C03C 13/04 (2006.01) G02B 6/18 (1990.01)
Patent
CA 2095271
ABSTRACT OF THE DISCLOSURE Lead-containing fluoride glass comprises 50-70 mol% of ZrF4, 3-5 mol% of LaF3, 0.1-3 mol% of YF3, and 2-15 mol% of NaF and/or LiF and/or CsF, where LaF3+YF3=4.5-6 mol%, and further comprises lead. An optical fiber comprises a core made of the lead-containing fluoride glass and a cladding surrounding the core. A process for producing an optical fiber comprises forming a base material for a core of the lead-containing fluoride glass, forming a base material for a cladding of fluoride glass containing 30-60 mol% of HfF4 and drawing the base materials into an optical fiber at a drawing temperature of 315-340 °C.
Kanamori Hiroo
Kogo Takashi
Miyajima Yoshiaki
Nakazawa Masataka
Onishi Masashi
Marks & Clerk
Nippon Telegraph And Telephone Corporation
Sumitomo Electric Industries Ltd.
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