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    GLASS-BODY-PRODUCING METHOD AND OPTICAL GLASS BODY AND OPTICAL FIBER
    1.
    发明专利
    GLASS-BODY-PRODUCING METHOD AND OPTICAL GLASS BODY AND OPTICAL FIBER 未知

    公开(公告)号：CA2508955C

    公开(公告)日：2012-09-11

    申请号：CA2508955

    申请日：2005-06-01

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： HARUNA TETSUYA ,  ISHIKAWA SHINJI ,  TARU TOSHIKI ,  KATAYAMA TETSUTAROU ,  TAIRA NOBUYUKI

    IPC: C03B37/018 ,  G02B6/02

    Abstract: A method produces a glass body that contains a reduced amount of OH groups in the metallic-oxide-containing glass layer and that has a reduced amount of transmission loss due to OH groups when the glass body is transformed into an optical fiber. The production method produces an optical glass body. An optical fiber contains the optical glass body in at least one part of its region for guiding a lightwave. The production method includes the following steps: (a) introducing into a glass pipe a gas containing an organometallic compound and a glass-forming material; (b) decomposing the organometallic compound into an organic constituent and a metallic constituent; (c) heating and oxidizing the metallic constituent so that produced glass particles containing a metallic oxide are deposited on the inner surface of the glass pipe to form a glass-particle-deposited layer; and (d) consolidating the deposited layer to form a metallic-oxide-containing glass layer.

    2.
    发明专利
    未知

    公开(公告)号：DE60042675D1

    公开(公告)日：2009-09-17

    申请号：DE60042675

    申请日：2000-02-25

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ENDO SHINJI ,  ISHIKAWA SHINJI ,  KAKUI MOTOKI ,  SUZUKI TOSHIMI

    IPC: H01S3/06 ,  H01S3/067 ,  C03B37/012 ,  C03B37/018 ,  C03C13/04 ,  G02B6/00 ,  G02B6/44 ,  H01S3/17

    Abstract: An optical fiber for optical amplifying, provided with a structure for implementing flat gain characteristics or oscillation characteristics in wider wavelength bands, and a production method therefor. The optical fiber for optical amplifying is provided with a second dope region containing an optical axis center-containing first dope region and having an outer diameter larger than that of the first dope region. At least any one of Al2O3, P2O5, Y2O3 and B2O3 are added into the second dope region as oxides of elements having valences different from those of cations constituting the main materials of the above optical fiber. At least any of Er, Nd, Tm, Yb, Pr as rare earth elements, in addition to the above oxides, are added into the first dope region.

    Optical fiber grating element, production method thereof and optical fiber filter
    5.
    发明专利
    Optical fiber grating element, production method thereof and optical fiber filter 未知

    公开(公告)号：AU756788B2

    公开(公告)日：2003-01-23

    申请号：AU2003800

    申请日：2000-01-13

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ENOMOTO TADASHI ,  ISHIKAWA SHINJI ,  SHIGEHARA MASAKAZU ,  HARUMOTO MICHIKO

    IPC: G02B6/14 ,  G02B6/26 ,  G02B6/34 ,  G02B6/16 ,  G02B6/10

    Abstract: The present invention relates to an optical fiber grating element having structure enabling more precise design and fabrication, a production method thereof, and an optical fiber filter including the same. The optical fiber grating element according to the present invention comprises a multi-mode optical fiber having a first core region of a refractive index n1, a second core of a refractive index n2 provided on a periphery of the first core region, and a cladding region of a refractive index n3 provided on a periphery of the second core region, and having a cutoff wavelength regarding to LP02-mode light on the longer wavelength side than a wavelength band in use. A long-period grating for selectively coupling the fundamental LP01-mode light of a predetermined wavelength in the wavelength band I use to LP0m (m>=2)-mode light is provided in a predetermined region of the first core region.

    Optical fiber and optical component including the same
    6.
    发明专利
    Optical fiber and optical component including the same 未知

    公开(公告)号：AU6357101A

    公开(公告)日：2002-03-07

    申请号：AU6357101

    申请日：2001-08-21

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ISHIKAWA SHINJI ,  HASHIMOTO KEN ,  SHIBATA TOSHIKAZU

    IPC: G02B6/00 ,  C03C13/04 ,  G02B6/02 ,  G02B6/036 ,  G02B6/287 ,  G02B6/34 ,  G02B6/18 ,  G02B6/22

    Abstract: The present invention relates to an optical fiber having a sufficient strength, and an optical component, such as a taper-fused coupler with a grating in the coupling region, including the optical fiber. The optical fiber has an outer diameter D; and comprises a core region, a first cladding region surrounding the core region, and a second cladding region surrounding the first cladding region. The core region is a glass region mainly composed of a silica glass material with a GeO2 content of 1 wt% or more. The first cladding region is a glass region, mainly composed of a silica glass material with a GeO2 content of 1 wt% or more, having an outer diameter of 0.80D or more but 0.98D or less. The second cladding region is a glass region mainly composed of a silica glass material with a GeO2 content of less than 0.2 wt%.

    Optical parts assembling method and the optical parts
    7.
    发明专利
    Optical parts assembling method and the optical parts 未知

    公开(公告)号：AU732839B2

    公开(公告)日：2001-05-03

    申请号：AU8309398

    申请日：1998-09-03

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： SASAKI TAKASHI ,  ISHIKAWA SHINJI

    IPC: G02B6/24 ,  B23K26/00 ,  B23K26/21 ,  B23K26/22 ,  B23K33/00 ,  G02B6/38 ,  G02B6/42 ,  G02B6/36 ,  B23K31/02

    Abstract: An optical component assembling method, in which a first metal housing (10) holding a first optical element and a second metal housing (20) holding a second optical element are made to abut against each other on joint surfaces (10b, 20b) thereof, and irradiated with a laser beam (31) so as to be fixedly welded with each other, characterized in that one of the metal housings overhangs from the other of the metal housings, and the laser beam is radiated in an incident direction &thetas; inclined to the overhanging metal housing side so as to perform spot-welding (30) on outer circumferences of the joint surfaces where the metal housings abut against each other, whereby the decrease of light-intensity at the time of assembly is suppressed to be extremely low.

    Method of fabricating an optical fibre preform
    10.
    发明专利
    Method of fabricating an optical fibre preform 未知

    公开(公告)号：GB2307908B

    公开(公告)日：1999-09-08

    申请号：GB9625273

    申请日：1996-12-04

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ISHIKAWA SHINJI ,  ITO MASUMI ,  HOSHINO SUMIO

    IPC: C03B37/014

    Abstract: In a soot-deposition container, raw material gas and at the tip of a starting glass rod, combustion gas, and carrier gas are supplied to a core-depositing burner and raw material gas, combustion gas, carrier gas, and gas for doping of fluorine are supplied to a cladding-depositing burner, thereby forming porous glass soot comprised of glass soot for core and glass soot for cladding. With growth of soot, the supply amount of the fluorine-doping gas is increased while supply amounts of the other gases are kept constant. Next, dehydration process and transparentizing process of soot are carried out to obtain a glass preform for optical fiber. Fabricated in this way is the glass preform for optical fiber having the silica glass portion doped with low-concentration fluorine with high uniformity in the growth direction.

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