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公开(公告)号：IT8567911D0
公开(公告)日：1985-10-29
申请号：IT6791185
申请日：1985-10-29
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： GREGO GIUSEPPE COCITO GIORGIO , MODONE EROS
IPC: C03B37/012 , G02B6/00 , C03B37/018 , G02B6/024 , G02F
Abstract: The method allows fabrication of optical fibres with noncircular core cross-section, with CDV technique, thanks to varying-thickness layer deposition along the internal perimeter of each section of the reaction tube wherein the fibre materials are deposited during preform fabrication.
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公开(公告)号：NO151194C
公开(公告)日：1985-02-27
申请号：NO811998
申请日：1981-06-12
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MODONE EROS , ROBA GIACOMO
IPC: C03B37/00 , C03B37/018 , C03B37/025 , C03C13/00 , C03C13/04 , C03C21/00 , G02B6/00
Abstract: Process for reducing hydroxyl-group content in preforms for optical fibres, manufactured by MCVD process, consisting of isotopic exchange between hydrogen and deuterium near the internal walls of the silica-glass supporting tube (8). The operation is carried out in two steps, first by inducing deuterium adsorption and then by termally activating the exchange reaction.
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公开(公告)号：AU538205B2
公开(公告)日：1984-08-02
申请号：AU7182581
申请日：1981-06-15
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： ROBA GIACOMO , MODONE EROS
IPC: C03B37/00 , C03B37/018 , C03B37/025 , C03C13/00 , C03C13/04 , C03C21/00 , G02B6/00
Abstract: Process for reducing hydroxyl-group content in preforms for optical fibres, manufactured by MCVD process, consisting of isotopic exchange between hydrogen and deuterium near the internal walls of the silica-glass supporting tube (8). The operation is carried out in two steps, first by inducing deuterium adsorption and then by termally activating the exchange reaction.
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公开(公告)号：BR8207118A
公开(公告)日：1983-10-11
申请号：BR8207118
申请日：1982-12-08
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MODONE EROS , ROBA GIACOMO
IPC: C03B37/02 , C03B37/023 , C03B37/025 , C03B37/027 , G02B6/00 , G02B5/172 , C03B37/075
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公开(公告)号：NO824217A
公开(公告)日：1983-06-23
申请号：NO824217
申请日：1982-12-15
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MODONE EROS , ROBA GIACOMO
IPC: C03B37/023 , C03B37/027 , G02B6/00 , C03B
CPC classification number: C03B37/027 , C03B37/023 , C03B37/02736 , C03B2201/30 , C03B2201/82 , C03B2201/84 , C03B2205/13
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Patent Agency Ranking
公开(公告)号：DE3661530D1
公开(公告)日：1989-02-02
申请号：DE3661530
申请日：1986-04-02
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MODONE EROS , ROBA GIACOMO
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公开(公告)号：NO158297B
公开(公告)日：1988-05-09
申请号：NO842438
申请日：1984-06-18
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： MODONE EROS
IPC: C01B17/20 , C03B8/00 , C03B8/04 , C03B37/018 , C03B19/14 , C03C3/32 , C03C4/10 , C03C13/04 , G02B1/00 , G02B6/00 , C03C3/12 , C01B19/04
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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公开(公告)号：CA1227320A
公开(公告)日：1987-09-29
申请号：CA457563
申请日：1984-06-27
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 , B01J12/02 , C01B19/04 , C01G1/12
Abstract: A process is provided for producing materials with optical transparency in the infrared, for use as raw materials for fabricating optical devices or fibres, in which a chemical vapour deposition process is used to obtain high purity metal chalcogenides by a double substitution reaction between a chalcogenedric acid of chalcogenide and a metallic salt.
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公开(公告)号：IT1145157B
公开(公告)日：1986-11-05
申请号：IT6785781
申请日：1981-06-22
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 , G02B
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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公开(公告)号：AU553297B2
公开(公告)日：1986-07-10
申请号：AU2723484
申请日：1984-04-24
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 , H01S3/16 , H01S3/17
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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