Method of producing an optical waveguide material

Details Method of producing an optical waveguide material Method of producing an optical waveguide material

C - Chemistry, Metallurgy

03

B

49/8

C03B 37/025 (2006.01) C03B 37/012 (2006.01) C03B 37/027 (2006.01) C03C 23/00 (2006.01)

Patent

CA 1124523

ABSTRACT OF THE DISCLOSURE A rod-in-tube method for producing an optical waveguide material is disclosed, in which a hydrogen-free compound containing at least one selected from the group consisting of C, N, O, S, Se and at least one of halogens is passed in a vapor state through the clearance between a silica glass cladding material and a silica glass core material inserted thereinto prior to their fusion to vapor-phase treat the surfaces of these two materials under heating up to a high temperature for removing impurities existing there- at as volatile halogenides and these vapor-phase treated two materials are immediately fused by heating up to a higher temperature to be pulled. The thus produced optical wave- guide material is improved in the boundary condition of these two materials fused and therefore very low in light attenuation.

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