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    3.
    发明专利
    未知

    公开(公告)号：DE3669493D1

    公开(公告)日：1990-04-19

    申请号：DE3669493

    申请日：1986-04-10

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： PARISI GIUSEPPE ,  ROBA GIACOMO

    IPC: G02B6/00 ,  C03B37/018 ,  C03C13/04 ,  C03B37/025

    Abstract: The method allows the production of silica and dopant with reactions among gaseous chemical compounds. The optical fibres produced do not present dip and exhibit low attenuation. Carbon dioxide is used as an oxidizer and organometallic aluminum compounds are used to obtain the dopant; silica is obtained from organometallic silicon compounds or silicon tetrachloride.

    5.
    发明专利
    未知

    公开(公告)号：IT1178811B

    公开(公告)日：1987-09-16

    申请号：IT6701784

    申请日：1984-01-10

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： PARISI GIUSEPPE

    IPC: C03B23/045 ,  C03B37/018 ,  F16L37/00 ,  F16L39/04 ,  F16B

    Abstract: Airtight rotating joint. composed of a fixed part and of a rotating one both equipped with an axial conduit (3, 8, 23, 17) ending in a chamber (5,19), rendered airtight and separated from the outside by means of a second pressurizable chamber (9, 26).The joint is particularly suited to equipments where high-purity materials have to be handled.

    6.
    发明专利
    未知

    公开(公告)号：IT8567338D0

    公开(公告)日：1985-04-10

    申请号：IT6733885

    申请日：1985-04-10

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： PARISI GIUSEPPE ,  ROBA GIACOMO

    IPC: G02B6/00 ,  C03B37/018 ,  C03C13/04 ,  G02B

    Abstract: The method allows the production of silica and dopant with reactions among gaseous chemical compounds. The optical fibres produced do not present dip and exhibit low attenuation. Carbon dioxide is used as an oxidizer and organometallic aluminum compounds are used to obtain the dopant; silica is obtained from organometallic silicon compounds or silicon tetrachloride.

    PRODUCTION OF OPTICAL FIBRES BY VAPOUR REACTION OF AN ORGANO-METALLIC COMPOUND AND HALOGEN
    7.
    发明专利
    PRODUCTION OF OPTICAL FIBRES BY VAPOUR REACTION OF AN ORGANO-METALLIC COMPOUND AND HALOGEN 未知

    公开(公告)号：CA1277952C

    公开(公告)日：1990-12-18

    申请号：CA505633

    申请日：1986-04-02

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： PARISI GIUSEPPE ,  ROBA GIACOMO

    IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03B37/027 ,  C03B37/025

    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.

    9.
    发明专利
    未知

    公开(公告)号：IT1184068B

    公开(公告)日：1987-10-22

    申请号：IT6733885

    申请日：1985-04-10

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： PARISI GIUSEPPE ,  ROBA GIACOMO

    IPC: G02B6/00 ,  C03B37/018 ,  C03C13/04 ,  G02B

    Abstract: The method allows the production of silica and dopant with reactions among gaseous chemical compounds. The optical fibres produced do not present dip and exhibit low attenuation. Carbon dioxide is used as an oxidizer and organometallic aluminum compounds are used to obtain the dopant; silica is obtained from organometallic silicon compounds or silicon tetrachloride.

    10.
    发明专利
    未知

    公开(公告)号：IT8467017D0

    公开(公告)日：1984-01-10

    申请号：IT6701784

    申请日：1984-01-10

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： PARISI GIUSEPPE

    IPC: C03B23/045 ,  C03B37/018 ,  F16L37/00 ,  F16L39/04 ,  F16B

    Abstract: Airtight rotating joint. composed of a fixed part and of a rotating one both equipped with an axial conduit (3, 8, 23, 17) ending in a chamber (5,19), rendered airtight and separated from the outside by means of a second pressurizable chamber (9, 26).The joint is particularly suited to equipments where high-purity materials have to be handled.

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