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    53.
    发明专利
    未知

    公开(公告)号：DK299684A

    公开(公告)日：1984-12-31

    申请号：DK299684

    申请日：1984-06-19

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： MODONE EROS

    IPC: C03B37/018 ,  C01B17/20 ,  C03B8/00 ,  C03B8/04 ,  C03B19/14 ,  C03C3/32 ,  C03C4/10 ,  C03C13/04 ,  G02B1/00 ,  G02B6/00 ,  C01B

    Abstract: In order to obtain substances that are optically transparent in the infrared range, usable in the manufacture of optical fibers or radiation emitters, a metal or metalloid chalcogenide other than an oxide is produced by a double-substitution reaction between a starting chalcogen compound-particularly a hydride such as H2S, H2Se or H2Te-and a salt of the desired metal or metalloid, e.g. a chloride. The starting compound and the reactant salt preferably are vaporized at a temperature below the melting point of the resulting metal chalcogenide which thereupon precipitates in the reaction chamber.

    55.
    发明专利
    未知

    公开(公告)号：DK299684D0

    公开(公告)日：1984-06-19

    申请号：DK299684

    申请日：1984-06-19

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： MODONE EROS

    IPC: C03B37/018 ,  C01B17/20 ,  C03B8/00 ,  C03B8/04 ,  C03B19/14 ,  C03C3/32 ,  C03C4/10 ,  C03C13/04 ,  G02B1/00 ,  G02B6/00 ,  C01G ,  C01B

    Abstract: In order to obtain substances that are optically transparent in the infrared range, usable in the manufacture of optical fibers or radiation emitters, a metal or metalloid chalcogenide other than an oxide is produced by a double-substitution reaction between a starting chalcogen compound-particularly a hydride such as H2S, H2Se or H2Te-and a salt of the desired metal or metalloid, e.g. a chloride. The starting compound and the reactant salt preferably are vaporized at a temperature below the melting point of the resulting metal chalcogenide which thereupon precipitates in the reaction chamber.

    59.
    发明专利
    未知

    公开(公告)号：NO821973L

    公开(公告)日：1982-12-23

    申请号：NO821973

    申请日：1982-06-14

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： MODONE EROS ,  ROBA GIACOMO

    IPC: C03B8/04 ,  C03B37/014 ,  C03B37/018 ,  C03B37/025 ,  C03C13/00 ,  C03C13/04 ,  G02B6/44 ,  C03B

    Abstract: Vapor deposition of doped silica in a reaction chamber on a rotating supporting surface, in the manufacture of a preform for the drawing of an optical fiber, is accompanied by the continuous admixture of deuterium with a flow of carrier gas, specifically oxygen, by which the reactants are transported to the reaction chamber. An isotopic substitution of deuterium for the hydrogen of hydroxyl groups in the reaction products shifts the major absorption peaks to wavelengths outside the minimum-attenuation range of 0.7 to 1.6 mu used for fiber-optical signaling. The proper ratio of deuterium to carrier gas is maintained with the aid of a mixer having two compartments separated by a perforated diaphragm or a thin metallic foil, one compartment being connected to a deuterium tank while the other communicates with a conduit through which the vapors entrained by the carrier gas pass to the reaction chamber.

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