C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
204/109, 204/91.
C03B 37/018 (2006.01) C03B 37/014 (2006.01) C03B 37/025 (2006.01) C03B 37/027 (2006.01)
Patent
CA 1277952
ABSTRACT Optical fibres for transmission in the medium infrared are manufactured using metal fluorides or chlorides obtained by vapour-phase reaction initiated at ambient temperature by ultraviolet radiation between an organo-metallic compound and a fluorine or chlorine containing gaseous reactant. The reaction products are subjected to thermal treatments in successive zones so as first to induce thermophoretic deposition in an axial direction onto an end of a preform and to expel vapour-phase reaction products, following which the deposited material is raised to melting point, cooled to vitrify it, the preform is annealed, and its opposite end is heated and drawn into a fibre. Core and cladding material may be formed and deposited in separate coaxial zones.
505633
Parisi Giuseppe
Roba Giacomo
Cselt - Centro Studi E. Laboratori Telecommunicazioni S.p.a.
Ridout & Maybee Llp
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