C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
31/203, 88/97
C03C 13/04 (2006.01) C03C 3/32 (2006.01) G02B 6/02 (2006.01)
Patent
CA 1308584
ABSTRACT A high numerical aperture optical fibre, e.g.for use in remote spectroscopy, has a cladding of a halide glass which contains Hf and a core of a halide glass which contains Pb. Preferably both glasses contain ZrF4, BaF2, LaF3, AlF3 and NaF. In addition the cladding contains HfF4 but no PbF2 and the core contains PbF2 but no HfF4.
557806
France Paul William
Williams John Richard
British Telecommunications Public Limited Company
G. Ronald Bell & Associates
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