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    1.
    发明专利
    未知

    公开(公告)号：DE69833515D1

    公开(公告)日：2006-04-27

    申请号：DE69833515

    申请日：1998-04-29

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ISHIKAWA SHINJI ,  IWASHIMA TORU ,  HARUMOTO MICHIKO ,  INOUE AKIRA

    IPC: G02B6/293 ,  G02B6/34

    Abstract: The present invention provides a method for determining a condition of aging for an optical fiber grating. This method comprises a step of setting the aged deterioration curve of the optical fiber grating as a form proportional to t , where t represents time, and n represents a parameter dependent on temperature; and a step of determining the condition of the aging according to the aged deterioration curve.

    DIFFRACTION GRATING DEVICE MAKING METHOD AND APPARATUS
    5.
    发明专利
    DIFFRACTION GRATING DEVICE MAKING METHOD AND APPARATUS 未知

    公开(公告)号：CA2455028A1

    公开(公告)日：2004-07-14

    申请号：CA2455028

    申请日：2004-01-12

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： HASHIMOTO KEN ,  SHIBATA TOSHIKAZU ,  MURASHIMA KIYOTAKA ,  INOUE AKIRA ,  IWASHIMA TORU

    IPC: G02B5/18 ,  G02B6/02 ,  G02B6/34 ,  G02B6/10

    Abstract: Refractive index change inducing light UV outputted from a light source passes a shutter and an optical system, and then is reflected by a mirror, so as to irradiate an optical fiber by way of a phase grating mask. A diffracting action of the phase grating mask generates a (+)first-order light component and a (-)first-order light component, which interfere with each other, thereby generating interference fringes with a fringe interval ~. As the mirror moves along the z axis, an irradiation position at which the optical fiber is irradiated with the refractive index change inducing light UV by way of the phase grating mask is scanned. While moving the mirror upon irradiation with the refractive index change inducing light UV, the phase grating mask is vibrated along the z axis under the action of a piezoelectric device. The phase or period of vibration varies from scan to scan.

    OPTICAL WAVEGUIDE DEVICES AND METHODS OF FABRICATING THE SAME
    6.
    发明专利
    OPTICAL WAVEGUIDE DEVICES AND METHODS OF FABRICATING THE SAME 未知

    公开(公告)号：CA2346593A1

    公开(公告)日：2001-11-09

    申请号：CA2346593

    申请日：2001-05-08

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： IWASHIMA TORU ,  SEMURA SHIGERU ,  HATTORI TETSUYA

    IPC: G02B6/10 ,  G02B6/122 ,  G02B6/13 ,  G02B6/132 ,  G02B6/30 ,  G02B6/36

    Abstract: The present invention concerns an optical waveguide device having a structure for effectively suppressing variation in optical characteristics due to temperature change without causing increase in device size, and a fabrication method thereof. The optical waveguide device has a structure in which a first main member having a positive coefficient of linear expansion is fixed to a sub member having a negative coefficient of linear expansion. The first main member is provided with an undercladding, a core functioning as an optical waveguide provided on a plane of the undercladding, and an overcladding provided so as to cover the core between the undercladding and the overcladding. The first main member is made, for example, of a silica glass or silicon based material and the core is doped with a dopant for increasing the refractive index. While covering the whole of at least one major surface of the first main member, the sub member is fixed to the major surface.

    OPTICAL WAVEGUIDE DEVICES AND METHODS OF FABRICATING THE SAME
    9.
    发明专利
    OPTICAL WAVEGUIDE DEVICES AND METHODS OF FABRICATING THE SAME 未知

    公开(公告)号：CA2346593C

    公开(公告)日：2010-02-09

    申请号：CA2346593

    申请日：2001-05-08

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： HATTORI TETSUYA ,  SEMURA SHIGERU ,  IWASHIMA TORU

    IPC: G02B6/10 ,  G02B6/122 ,  G02B6/13 ,  G02B6/132 ,  G02B6/30 ,  G02B6/36

    Abstract: The present invention concerns an optical waveguide device having a structure for effectively suppressing variation in optical characteristics due to temperature change without causing increase in device size, and a fabrication method thereof. The optical waveguide device has a structure in which a first main member having a positive coefficient of linear expansion is fixed to a sub member having a negative coefficient of linear expansion. The first main member is provided with an undercladding, a core functioning as an optical waveguide provided on a plane of the undercladding, and an overcladding provided so as to cover the core between the undercladding and the overcladding. The first main member is made, for example, of a silica glass or silicon based material and the core is doped with a dopant for increasing the refractive index. While covering the whole of at least one major surface of the first main member, the sub member is fixed to the major surface.

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