公开(公告)号：CA1289746C

公开(公告)日：1991-10-01

申请号：CA520816

申请日：1986-10-17

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE ,  GREGO GIORGIO ,  MODONE EROS

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/018 ,  G02B6/024 ,  C03B37/027 ,  C03B37/15

Abstract: A method is provided for fabrication of optical fibres with non-circular core cross section using the ICVD technique, by depositing layers of material which vary in thickness around the internal perimeter of each section of a reaction tube so as to form a preform which can be collapsed to a non-circular profile. The non-uniform thickness can be obtained by varying the profile or wall thickness of the reaction tube, or by selectively shielding the tube from a heat source, so as to vary the temperature at different points on the periphery of the tube during deposition.

公开(公告)号：DE3763502D1

公开(公告)日：1990-08-09

申请号：DE3763502

申请日：1987-04-09

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE

IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04

Abstract: The process employs solid-state halides heated at high temperature, under pressure conditions necessary to their vaporization, and obtains their condensation to solid state on the internal surface of a glass tube, which, after collapsing, forms the preform.

公开(公告)号：IT1091498B

公开(公告)日：1985-07-06

申请号：IT6965577

申请日：1977-11-25

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE

IPC: C03C21/00 ,  C03B19/01 ,  C03B37/012 ,  C03B37/014 ,  C03C3/06 ,  G02B6/00 ,  G02B6/02 ,  G02B ,  H04B

Abstract: An elongate light conductor of circular or other cross-section is continuously produced by depositing, in a vacuum chamber, a powdered glassy (i.e. vitreous or vitrifiable) material upon the upper end of a descending rod of like material while training a stream of doping ions upon the same end. Vitrification may be assisted by an electron beam, also trained upon the powder-receiving rod end, and/or by thermal treatment of the rod leaving the vacuum chamber. The lower end of the rod is softened in a furnace from which a vitreous strand of reduced cross-section is continuously drawn through an orifice and wound upon a mandrel.

公开(公告)号：NO145614C

公开(公告)日：1982-04-28

申请号：NO783009

申请日：1978-09-04

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE ,  MICHETTI LEONARDO

IPC: B65H20060101 ,  C03B20060101 ,  C03B37/00 ,  G02B20060101

公开(公告)号：CH629165A5

公开(公告)日：1982-04-15

申请号：CH1202978

申请日：1978-11-23

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE

IPC: C03C21/00 ,  C03B19/01 ,  C03B37/012 ,  C03B37/014 ,  C03C3/06 ,  G02B6/00 ,  G02B6/02 ,  C03B37/025

公开(公告)号：DE2850493A1

公开(公告)日：1979-05-31

申请号：DE2850493

申请日：1978-11-21

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE

IPC: C03C21/00 ,  C03B19/01 ,  C03B37/012 ,  C03B37/014 ,  C03C3/06 ,  G02B6/00 ,  G02B6/02 ,  C03B37/00 ,  C03C25/00

Abstract: An elongate light conductor of circular or other cross-section is continuously produced by depositing, in a vacuum chamber, a powdered glassy (i.e. vitreous or vitrifiable) material upon the upper end of a descending rod of like material while training a stream of doping ions upon the same end. Vitrification may be assisted by an electron beam, also trained upon the powder-receiving rod end, and/or by thermal treatment of the rod leaving the vacuum chamber. The lower end of the rod is softened in a furnace from which a vitreous strand of reduced cross-section is continuously drawn through an orifice and wound upon a mandrel.

公开(公告)号：NO783009L

公开(公告)日：1979-03-06

申请号：NO783009

申请日：1978-09-04

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE ,  MICHETTI LEONARDO

IPC: B65H20060101 ,  C03B20060101 ,  C03B37/00 ,  G02B20060101 ,  C03B

公开(公告)号：FR2374812A1

公开(公告)日：1978-07-13

申请号：FR7737619

申请日：1977-12-14

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE

IPC: C03B37/029 ,  F27D11/02 ,  H05B3/62 ,  F27B17/00 ,  H05B3/14

Abstract: The electric furnace has a solid graphite resistance element in an inert atmosphere. The resistance element (C) which forms the heating element is structured to obtain a highly concentrated heat zone with uniform temp. distribution. The structure is formed by a small solid graphite bar which is drilled and formed to present a pseudo annular part (CC) of constant wall thickness. This annular part (CC) forms the heat zone. To the annular part (CC) are connected current supply bars (A1, A2) via connections (R1, R2) which are designed to produce constant temp. distribution in the heat zone. The heating element is contained in a water cooled housing. Connections (L1, L2) maintain an inert gas pressure inside the housing. The housing has seats (S1, S2) for fixing two electrical terminals (M1, M2) connected to the heating element (C).

公开(公告)号：DE69600121T2

公开(公告)日：1998-05-07

申请号：DE69600121

申请日：1996-02-22

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE ,  GREGO GIORGIO

IPC: G02B6/00 ,  C03B37/027 ,  C03B37/12 ,  C03B37/15 ,  G02B6/024 ,  C03C25/00 ,  G02B6/16 ,  G02B6/10

Abstract: To manufacture polarisation-maintaining optical fibres, a fibre (8) is directly and continuously irradiated with at least one beam (9) of UV radiation during drawing and before application of external coatings.

公开(公告)号：IT1279164B1

公开(公告)日：1997-12-04

申请号：ITTO950189

申请日：1995-03-14

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE

IPC: B29K23/00 ,  B29D23/00 ,  G02B6/44 ,  H02G1/06 ,  H02G1/08 ,  H02G9/06

Abstract: A duct for housing cables for underground telecommunications networks comprises one or more tubular elements (1) of a first plastic material, having helical ribs (2a, 2b; 3) on their inner surface. The ribs may also be formed as inserts into the material of the tubular element (1).