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    OPTICAL MODULE AND INPUTTING METHOD
    1.
    发明申请
    OPTICAL MODULE AND INPUTTING METHOD 审中-公开

    公开(公告)号：US20190170939A1

    公开(公告)日：2019-06-06

    申请号：US16208134

    申请日：2018-12-03

    Applicant: FUJIKURA LTD.

    Inventor： Takuya Oda ,  Akira Oka

    IPC: G02B6/126

    CPC classification number: G02B6/126 ,  G02B6/241 ,  G02B6/2726 ,  G02B6/2766 ,  G02B2006/12061

    Abstract: An optical module includes: an output section that outputs TM light; and a substrate-type optical waveguide. The substrate-type optical waveguide includes: a waveguide that guides the TM light outputted from the output section; a polarization rotating element that converts the TM light guided through the waveguide into TE light; and a function element that receives the TE light. In the optical module equation (a×L)>(b×L+c) is satisfies, where L is a length of the waveguide, a is a propagation loss of the TE light per unit length of the waveguide, b is a propagation loss of the TM light per unit length of the waveguide, and c is an insertion loss by the polarization rotating element.

    High-order polarization conversion device, optical waveguide device, and DP-QPSK modulator
    3.
    发明授权
    High-order polarization conversion device, optical waveguide device, and DP-QPSK modulator 有权
    高阶偏振转换器件，光波导器件和DP-QPSK调制器

    公开(公告)号：US09557482B2

    公开(公告)日：2017-01-31

    申请号：US14976603

    申请日：2015-12-21

    Applicant: Fujikura Ltd.

    Inventor： Akira Oka ,  Kazuhiro Goi ,  Kensuke Ogawa ,  Hiroyuki Kusaka

    IPC: G02B6/00 ,  G02B6/10 ,  G02B6/126 ,  G02B6/122 ,  G02B6/27 ,  G02B6/12

    CPC classification number: G02B6/126 ,  G02B6/105 ,  G02B6/1228 ,  G02B6/2726 ,  G02B6/2766 ,  G02B2006/12038 ,  G02B2006/12061

    Abstract: A high-order polarization conversion device configured of a planar optical waveguide, includes: a substrate; a lower clad disposed on the substrate; a core including a lower core and an upper core, the lower core being disposed on the lower clad and having a fixed height in a rectangular sectional shape, the upper core being formed of the same material as the lower core and having a fixed height in a rectangular sectional shape that is disposed continuously on the lower core; and an upper clad that is disposed on the core and the lower clad and is formed of the same material as the lower clad. The high-order polarization conversion device performs high-order polarization conversion between TE1 of the start portion and TM0 of the end portion.

    Abstract translation: 由平面光波导构成的高阶偏振光转换装置包括：基板; 设置在所述基板上的下包层; 包括下芯和上芯的芯，下芯设置在下包层上并具有矩形截面形状的固定高度，上芯由与下芯相同的材料形成，并具有固定的高度 连续地设置在下芯上的矩形截面形状; 以及设置在芯和下包层上并由与下包层相同的材料形成的上包层。 高阶偏振变换装置在起始部分的TE1和端部的TM0之间进行高阶极化转换。

    SUBSTRATE-TYPE OPTICAL WAVEGUIDE ELEMENT
    5.
    发明申请
    SUBSTRATE-TYPE OPTICAL WAVEGUIDE ELEMENT 有权

    公开(公告)号：US20170176679A1

    公开(公告)日：2017-06-22

    申请号：US15447693

    申请日：2017-03-02

    Applicant: FUJIKURA LTD.

    Inventor： Akira Oka

    IPC: G02B6/126 ,  H04J14/06 ,  G02B6/27 ,  G02F1/01 ,  G02B6/125

    CPC classification number: G02B6/126 ,  G02B6/1228 ,  G02B6/125 ,  G02B6/2773 ,  G02F1/011 ,  G02F2203/07 ,  H04J14/06

    Abstract: Provided is a substrate-type optical waveguide element in which when (i) effective refractive indexes of a TE polarized wave and a TM polarized wave in the first core are NTE@WG1 and NTM@WG1, respectively, and (ii) effective refractive indexes of a TE polarized wave and a TM polarized wave in the second core are NTE@WG2 and NTM@WG2, respectively, a magnitude relation of the effective refractive indexes NTM@WG1 and NTM@WG2 at a start position of a parallel-core section is opposite to a magnitude relation of the effective refractive indexes NTM@WG1 and NTM@WG2 at an end position of the parallel-core section, and at least one of the cores includes (a) a main part having a quadrilateral cross section and (b) a protruding part protruding from one of side surfaces of the main part in a direction parallel to a boundary surface between a lower cladding and a upper cladding.

    Optical module and inputting method
    6.
    发明授权
    Optical module and inputting method 有权

    公开(公告)号：US10422953B2

    公开(公告)日：2019-09-24

    申请号：US16208134

    申请日：2018-12-03

    Applicant: FUJIKURA LTD.

    Inventor： Takuya Oda ,  Akira Oka

    IPC: G02B6/126 ,  G02B6/27 ,  G02B6/12 ,  G02B6/24

    Abstract: An optical module includes: an output section that outputs TM light; and a substrate-type optical waveguide. The substrate-type optical waveguide includes: a waveguide that guides the TM light outputted from the output section; a polarization rotating element that converts the TM light guided through the waveguide into TE light; and a function element that receives the TE light. In the optical module equation (a×L)>(b×L+c) is satisfies, where L is a length of the waveguide, a is a propagation loss of the TE light per unit length of the waveguide, b is a propagation loss of the TM light per unit length of the waveguide, and c is an insertion loss by the polarization rotating element.

    Planar optical waveguide device and DP-QPSK modulator
    8.
    发明授权
    Planar optical waveguide device and DP-QPSK modulator 有权
    平面光波导器件和DP-QPSK调制器

    公开(公告)号：US09335472B2

    公开(公告)日：2016-05-10

    申请号：US14509126

    申请日：2014-10-08

    Applicant: FUJIKURA LTD.

    Inventor： Akira Oka ,  Kensuke Ogawa ,  Kazuhiro Goi ,  Hiroyuki Kusaka

    IPC: G02F1/035 ,  G02B6/122 ,  G02B6/125 ,  G02B6/126 ,  G02B6/14

    CPC classification number: G02B6/1228 ,  G02B6/125 ,  G02B6/126 ,  G02B6/14

    Abstract: A planar optical waveguide device, includes: two input portions that are waveguides that have the same width, are parallel to each other, and have rectangular cross-sections; a wide portion that is a linear waveguide and is connected after the two input portions; a tapered portion that is connected after the wide portion and that is a multi-mode waveguide which has a tapered shape having a width decreasing gradually and through which at least TE1 propagates; and an output portion that is connected after the tapered portion and that is a multi-mode waveguide which has a rectangular cross-section and through which at least TE1 propagates. The planar optical waveguide device forms a high-order mode conversion combining element that outputs the TE0, which is input to the two input portions, as the TE1 from the output portion.

    Abstract translation: 平面光波导装置包括：具有相同宽度的波导的两个输入部分彼此平行并具有矩形横截面; 宽的部分是线性波导并且在两个输入部分之后连接; 连接在宽部分之后的锥形部分，并且是具有逐渐减小并且至少TE1传播的宽度的锥形形状的多模式波导; 以及输出部分，其连接在锥形部分之后，并且是具有矩形横截面且至少TE1传播的多模波导的输出部分。 平面光波导器件形成从输出部分输出到两个输入部分的TE1作为TE1的高阶模式转换组合元件。

    Substrate-type optical waveguide element
    9.
    发明授权
    Substrate-type optical waveguide element 有权

    公开(公告)号：US09784918B2

    公开(公告)日：2017-10-10

    申请号：US15447659

    申请日：2017-03-02

    Applicant: FUJIKURA LTD.

    Inventor： Akira Oka

    IPC: G02B6/12 ,  G02B6/126 ,  G02B6/125 ,  G02B6/27 ,  G02B6/122 ,  G02F1/01 ,  H04J14/06

    CPC classification number: G02B6/126 ,  G02B6/1228 ,  G02B6/125 ,  G02B6/14 ,  G02B6/2773 ,  G02F1/011 ,  G02F2203/07 ,  H04J14/06

    Abstract: An effective refractive index of a TM0 polarized wave guided through the first core when existing alone and an effective refractive index of a TE0 polarized wave guided through the second core when existing alone are continuous as a function of a distance from a starting point of a side-by-side arrangement section. A magnitude relationship between an effective refractive index of an odd mode of a TE0 polarized wave guided through the side-by-side arrangement section and an effective refractive index of an even mode of a TM0 polarized wave guided through the side-by-side arrangement section is reversed between the starting point and an ending point of the side-by-side arrangement section. A refractive index distribution is vertically asymmetrical in an interaction section. An emission edge surface and an emission edge surface cover an entrance edge surface without excess or deficiency.

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