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    High-order polarization conversion device, optical waveguide device, and DP-QPSK modulator
    12.
    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。

    OPTICAL WAVEGUIDE DEVICE
    13.
    发明申请
    OPTICAL WAVEGUIDE DEVICE 有权
    光波器件

    公开(公告)号：US20150241633A1

    公开(公告)日：2015-08-27

    申请号：US14422926

    申请日：2013-08-13

    Applicant: FUJIKURA LTD.

    Inventor： Hiroyuki Kusaka ,  Kensuke Ogawa ,  Kazuhiro Goi

    IPC: G02B6/28 ,  G02F1/225

    CPC classification number: G02B6/2821 ,  G02B6/122 ,  G02B6/125 ,  G02B6/14 ,  G02B6/2813 ,  G02B6/2935 ,  G02F1/225 ,  G02F1/2255 ,  G02F2001/212

    Abstract: An optical waveguide device includes: a mode splitter including a main waveguide in which lights can be propagated in at least two propagation modes with different propagation orders and a subsidiary waveguide which includes a coupling section disposed in parallel with the main waveguide at a certain distance away from the main waveguide so as to constitute a directional coupler and is capable of splitting at least one propagation mode out of the two or more propagation modes from the main waveguide. Also, ncore/ncladding which is a refractive index ratio between a core and a cladding which constitute the main waveguide and the subsidiary waveguide is in a range of 101% to 250%.

    Abstract translation: 一种光波导装置包括：模式分离器，包括主波导，其中光可以以不同传播次数的至少两个传播模式传播，以及辅助波导，其包括在主距离处与一段距离平行设置的耦合部分 从主波导构成定向耦合器，并且能够从主波导从两个或更多个传播模式中分离出至少一个传播模式。 此外，构成主波导和辅助波导的芯和包层之间的折射率之比ncore / ncladding在101％至250％的范围内。

    Substrate-type optical waveguide and introducing method using fundamental and higher TE/TM modes
    15.
    发明授权
    Substrate-type optical waveguide and introducing method using fundamental and higher TE/TM modes 有权

    公开(公告)号：US10386573B2

    公开(公告)日：2019-08-20

    申请号：US16146727

    申请日：2018-09-28

    Applicant: FUJIKURA LTD.

    Inventor： Kazuhiro Goi

    IPC: G02B6/10 ,  G02B6/14 ,  G02B6/12

    Abstract: A substrate-type optical waveguide includes: a mode conversion section including a first input light guide path and a first output light guide path; and a polarization conversion and multiplexing section including a second input light guide path and a second output light guide path. The mode conversion section converts light input into the first input light guide path into either: a superposition of a first TE fundamental mode and a first TE higher mode; or a superposition of a first TM fundamental mode and a first TM higher mode. The polarization conversion and multiplexing section converts either: the superposition of the first TE fundamental mode and the first TE higher mode; or the superposition of the first TM fundamental mode and the first TM higher mode, into a superposition of a second TE fundamental mode and a second TM fundamental mode.

    SUBSTRATE-TYPE OPTICAL WAVEGUIDE AND INTRODUCING METHOD
    16.
    发明申请
    SUBSTRATE-TYPE OPTICAL WAVEGUIDE AND INTRODUCING METHOD 审中-公开

    公开(公告)号：US20190101696A1

    公开(公告)日：2019-04-04

    申请号：US16146727

    申请日：2018-09-28

    Applicant: FUJIKURA LTD.

    Inventor： Kazuhiro Goi

    IPC: G02B6/10 ,  G02B6/12 ,  G02B6/14

    CPC classification number: G02B6/105 ,  G02B6/12007 ,  G02B6/1223 ,  G02B6/126 ,  G02B6/14 ,  G02B6/305 ,  G02B6/4215 ,  G02B2006/12164

    Abstract: A substrate-type optical waveguide includes: a mode conversion section including a first input light guide path and a first output light guide path; and a polarization conversion and multiplexing section including a second input light guide path and a second output light guide path. The mode conversion section converts light input into the first input light guide path into either: a superposition of a first TE fundamental mode and a first TE higher mode; or a superposition of a first TM fundamental mode and a first TM higher mode. The polarization conversion and multiplexing section converts either: the superposition of the first TE fundamental mode and the first TE higher mode; or the superposition of the first TM fundamental mode and the first TM higher mode, into a superposition of a second TE fundamental mode and a second TM fundamental mode.

    Optical transmission device and bidirectional optical transmission device
    17.
    发明授权
    Optical transmission device and bidirectional optical transmission device 有权

    公开(公告)号：US10162136B2

    公开(公告)日：2018-12-25

    申请号：US15889931

    申请日：2018-02-06

    Applicant: FUJIKURA LTD.

    Inventor： Kazuhiro Goi ,  Katsuhiro Takenaga

    IPC: G02B6/28 ,  G02B6/34 ,  H04B10/40 ,  G02B6/42 ,  G02B6/02

    Abstract: An optical transmission device includes a plurality of transmitting/receiving units provided on a substrate, each transmitting/receiving unit includes: an optical transmitter; an optical receiver; a polarization combiner/splitter; and a connection portion. In the connection portions which are arranged at the positions symmetrical to each other, a direction opposite, with respect to a virtual symmetry axis, to a direction of a main electric field on a plane perpendicular to an emission direction of an optical wave of the connection portion which is emitted from one of the connection portions to an outside is substantially orthogonal to a direction of a main electric field on a plane perpendicular to an emission direction of an optical wave of the connection portion which is emitted from the other of the connection portions to an outside.

    Polarization conversion element
    20.
    发明授权
    Polarization conversion element 有权
    极化转换元件

    公开(公告)号：US09529151B2

    公开(公告)日：2016-12-27

    申请号：US14976868

    申请日：2015-12-21

    Applicant: FUJIKURA LTD.

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

    IPC: G02B6/12 ,  G02B6/126 ,  G02B6/14 ,  G02B6/122

    CPC classification number: G02B6/126 ,  G02B6/1228 ,  G02B6/14 ,  G02B2006/1209 ,  G02B2006/12097 ,  G02B2006/12142 ,  G02B2006/12152 ,  G02B2006/12164

    Abstract: A polarization conversion element is disclosed in which an optical waveguide formed on a substrate sequentially includes a first waveguide portion, a polarization rotation portion, and a second waveguide portion, an effective refractive index of a TE mode having the highest effective refractive index in an eigen mode of waveguide light on a sectional surface of the first waveguide portion is higher than an effective refractive index of a TM mode having the highest effective refractive index, an effective refractive index of the TM mode having the highest effective refractive index on a sectional surface of the second waveguide portion is higher than an effective refractive index of the TE mode having the highest effective refractive index, and heights of waveguide structures (for example, cores) of the first waveguide portion and the second waveguide portion are equal to each other.

    Abstract translation: 公开了一种偏振转换元件，其中形成在基板上的光波导依次包括第一波导部分，偏振旋转部分和第二波导部分，在特征中具有最高有效折射率的TE模式的有效折射率 在第一波导部分的截面上的波导光的模式高于具有最高有效折射率的TM模式的有效折射率，在截面上具有最高有效折射率的TM模的有效折射率 第二波导部分高于具有最高有效折射率的TE模式的有效折射率，并且第一波导部分和第二波导部分的波导结构（例如，芯）的高度彼此相等。

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