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    OPTICAL FIBRE COUPLER
    3.
    发明专利
    OPTICAL FIBRE COUPLER 未知

    公开(公告)号：CA1267311A

    公开(公告)日：1990-04-03

    申请号：CA497705

    申请日：1985-12-16

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： MODONE EROS ,  MORASCA SALVATORE

    IPC: G02B6/42 ,  G02B6/28

    Abstract: A coupler is provided for establishing optical connection between a first optical fibre and a plurality of further optical fibres, formed by a transparent member in the shape of a paraboloid limited by a plane perpendicular to the paraboloid axis and having an inwardly reflective curved surface, an array of lenses having axes parallel to the paraboloid axis, the array being coplanar with the perpendicular limiting plane and including a first lens coaxial with the axis of the paraboloid, and centring means for receiving and aligning the ends of a plurality of optical fibres coaxially with said lenses, the end of the first optical fibre being located coaxial with the lens coaxial with the paraboloid axis so that an image of the fibre end is formed at the focus of the paraboloid, and the further optical fibre ends being located coaxial with further lenses in the array such that radiation parallel to the lens axes is condensed on the further fibre ends.

    6.
    发明专利
    未知

    公开(公告)号：NO153803C

    公开(公告)日：1986-05-28

    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 ,  C03B37/027

    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.

    PROCESS AND DEVICE FOR ONLINE DEHYDROGENATION OF FIBRE-DRAWING PREFORMS
    7.
    发明专利
    PROCESS AND DEVICE FOR ONLINE DEHYDROGENATION OF FIBRE-DRAWING PREFORMS 未知

    公开(公告)号：DE3262779D1

    公开(公告)日：1985-05-02

    申请号：DE3262779

    申请日：1982-06-21

    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

    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.

    8.
    发明专利
    未知

    公开(公告)号：AT12382T

    公开(公告)日：1985-04-15

    申请号：AT82105428

    申请日：1982-06-21

    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

    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.

    9.
    发明专利
    未知

    公开(公告)号：IT8367715D0

    公开(公告)日：1983-06-30

    申请号：IT6771583

    申请日：1983-06-30

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： MODONE EROS

    IPC: C01B17/20 ,  C03B37/018 ,  C03B8/00 ,  C03B8/04 ,  C03B19/14 ,  C03C3/32 ,  C03C4/10 ,  C03C13/04 ,  G02B1/00 ,  G02B6/00 ,  G02B

    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.

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