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    Optical device module and method for manufacturing the same
    22.
    发明专利
    Optical device module and method for manufacturing the same 未知

    公开(公告)号：AU8177794A

    公开(公告)日：1995-07-06

    申请号：AU8177794

    申请日：1994-12-29

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： SEMURA SHIGERU ,  SAITO MASAHIDE ,  YUI DAI ,  HIRAI SHIGERU ,  ISHIKAWA SHINJI

    IPC: G02B6/30 ,  G02B6/44

    Abstract: An optical device module comprises a module body including an optical device, a first fiber connector holding a first optical fiber, coupled to one end of the optical device, and a second fiber connector holding a second optical fiber, coupled to the other end of the optical device; and an enclosure body integrally molded with a resin such as an epoxy resin, an urethan resin to coat the module body. Almost whole module body is coated with the integrally molded epoxy resin, so that the module body is protected efficiently from the external heat, moisture, mechanical shock etc.

    24.
    发明专利
    未知

    公开(公告)号：DE69012350T2

    公开(公告)日：1995-02-23

    申请号：DE69012350

    申请日：1990-09-25

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： TSUCHIYA ICHIRO ,  SAITO MASAHIDE ,  ISHIKAWA SHINJI ,  OHGA YUICHI ,  KANAMORI HIROO

    IPC: C03B37/014

    Abstract: There is provided a furnace comprising a muffle tube made of highly pure carbon with a gas impermeable coating, a heater in a furnace body which surrounds the muffle tube and an inner cylinder made of highly pure carbon with or without a gas impermeable coating which is detachably fitted inside the muffle tube near the heater for a thermal treatment of a quartz glass preform by inserting the preform in the muffle tube, wherein at least one of the highly pure carbon made members which constitute the muffle tube, the inner cylinder and an optional element necessary for the muffle tube is made of a graphite material which is produced by self-sintering mesophase powder.

    A method for fabricating an optical waveguide
    25.
    发明专利
    A method for fabricating an optical waveguide 未知

    公开(公告)号：AU654415B2

    公开(公告)日：1994-11-03

    申请号：AU2986492

    申请日：1992-12-04

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： KANAMORI HIROO ,  URANO AKIRA ,  AIKAWA HARUHIKO ,  ISHIKAWA SHINJI ,  HIROSE CHISAI ,  SAITO MASAHIDE

    IPC: C03B19/14 ,  C03C17/02 ,  G02B6/12 ,  G02B6/13 ,  C03B8/04

    Abstract: In the first step, a fuel and raw material gasses are fed to a burner (4) while flames from the burner scan a Si substrate (1). Synthesized glass fine particles are deposited on the substrate (1) to form a first porous vitreous layer (5) to be a under cladding layer. In the second step, the first porous vitreous layer (5) is heated by the flames. A bulk density of an upper part of the first porous vitreous layer (5) is raised to 0.3 g/cm . This upper part with a raised bulk density functions as a shield layer against GeO2. In the third step, a second porous vitreous layer (6) to be a core layer is deposited uniformly on the first porous vitreous layer (5). In the fourth step the first and the second porous vitreous layers (5, 6) are sintered. In this case, the shield layer with a higher bulk density hinders the GeO2 component which has evaporated from the second porous vitreous layer (6) from diffusing into the first porous vitreous layer (5).

    26.
    发明专利
    未知

    公开(公告)号：FI92817B

    公开(公告)日：1994-09-30

    申请号：FI904390

    申请日：1990-09-06

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： OHGA YUICHI ,  ISHIKAWA SHINJI ,  KANAMORI HIROO ,  TSUCHIYA ICHIRO ,  YOKOTA HIROSHI

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

    Abstract: A heating furnace for heating a porous preform made of fine particles of quartz base glass for an optical fiber which comprises a heater and a muffle tube positioned inside the heater to separate a heating atmosphere from the heater, wherein the muffle tube body consists of highly pure carbon and an inner wall and an outer wall of the body is coated with a carbon material selected from the group consisting of pyrolytic graphite and solid-phase carbonized glassy carbon as well as a method for producing a glass preform for an optical fiber are disclosed.

    PROCESS OF DRAWING OPTICAL FIBER
    29.
    发明专利
    PROCESS OF DRAWING OPTICAL FIBER 未知

    公开(公告)号：AU7838491A

    公开(公告)日：1992-01-02

    申请号：AU7838491

    申请日：1991-06-14

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： OHGA YUICHI ,  ISHIKAWA SHINJI ,  KANAMORI HIROO ,  YOSHIMURA ICHIRO ,  YOKOTA HIROSHI

    IPC: G02B6/00 ,  C03B37/027 ,  C03B37/029

    Abstract: There is provided a process of melt drawing an optical fiber (119) from a preform (101) therefor in which a heating furnace (1) comprising a muffle tube (2) inside thereof through which the optical fiber (119) is passed is provided immediately below a melt drawing furnace (105) to further draw the optical fiber (119) while heated, and an interior of the muffle tube (2) is kept in an atmosphere selected from the group consisting of an inert atmosphere, an atmosphere comprising oxygen gas and an atmosphere comprising hydrogen gas.

    FURNACE FOR PRODUCTION OF OPTICAL FIBER PREFORM
    30.
    发明专利
    FURNACE FOR PRODUCTION OF OPTICAL FIBER PREFORM 未知

    公开(公告)号：CA2025880A1

    公开(公告)日：1991-03-26

    申请号：CA2025880

    申请日：1990-09-20

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： TSUCHIYA ICHIRO ,  SAITO MASAHIDE ,  ISHIKAWA SHINJI ,  OHGA YUICHI ,  KANAMORI HIROO

    IPC: C03B37/014 ,  C03B20/00 ,  F27B5/00 ,  C03B37/012 ,  F27B5/08

    Abstract: The present invention provides a furnace comprising a muffle tube made of a gas impermeable and heat resistant material, a heater in a furnace body which surrounds the muffle tube and an inner cylinder made of a heat resistant material which is detachably fitted inside the muffle tube near the heater for a thermal treatment of a quartz glass preform by inserting the preform in the muffle tube, wherein said muffle tube comprises a material selected from a group consisting of highly pure carbon coated with gas impermeable silicon carbide, sintered silicon carbide coated with gas impermeable silicon carbide, gas impermeable silicon carbide and highly pure carbon coated with gas impermeable carbon, and said inner cylinder comprises a material selected from a group consisting of highly pure carbon, highly pure carbon coated with gas impermeable silicon carbide and highly pure carbon coated with gas impermeable carbon.

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