C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/8, 204/96.31
C03B 37/02 (2006.01) C03B 37/018 (2006.01) C03B 37/027 (2006.01) C03C 17/02 (2006.01) G02B 6/44 (2006.01)
Patent
CA 1054795
ABSTRACT OF THE DISCLOSURE The bore of a glass tube is coated with a first layer of cladding glass of equal or higher refractive index than that of the tube and a second layer of core glass of higher refractive index than that of the first layer. The coated tube is then drawn into a fibre while collaps- ing the bore to form a solid core surrounded by cladding. An r.f. glow discharge vapor reaction with particular reagents in the tube produces the desired coating and provides reduced contamination. - 1 -
172817
Northern Telecom Limited
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