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    WAVELENGTH TUNABLE LIGHT SOURCE, LIGHT SOURCE MODULE, AND WAVELENGTH CONTROL METHOD
    31.
    发明申请
    WAVELENGTH TUNABLE LIGHT SOURCE, LIGHT SOURCE MODULE, AND WAVELENGTH CONTROL METHOD 审中-公开

    公开(公告)号：US20180249555A1

    公开(公告)日：2018-08-30

    申请号：US15902227

    申请日：2018-02-22

    Applicant: Fujitsu Optical Components Limited

    Inventor： Masaki Sugiyama

    IPC: H05B37/02

    CPC classification number: H05B37/0227 ,  G01J3/0259 ,  G02B6/00 ,  H01S5/00 ,  H01S5/0265 ,  H01S5/0612 ,  H01S5/0687 ,  H01S5/1032 ,  H01S5/142

    Abstract: A wavelength tunable light source has a light source, a wavelength monitor circuit that receives a portion of light emitted from the light source, and a processor that controls a wavelength of the light emitted from the light source based upon an output value of the wavelength monitor circuit, wherein the wavelength monitor circuit has a wavelength filter that outputs four light components with optical phases shifted by 90 degrees from one another and multiple photo detectors that detects the four light components output from the wavelength filter, and wherein the processor selects at least one of the four light components, calculates a ratio of a monitor value of the selected light component to a total sum of monitor values of the four light components, and adjusts the wavelength of the light source so as to bring the ratio to be closer to a target ratio at a designated wavelength.

    OPTICAL MODULE
    33.
    发明申请
    OPTICAL MODULE 审中-公开
    光学模块

    公开(公告)号：US20160246156A1

    公开(公告)日：2016-08-25

    申请号：US14984517

    申请日：2015-12-30

    Applicant: Fujitsu Optical Components Limited

    Inventor： Masaki Sugiyama ,  Akira Ishii ,  Norihisa Naganuma ,  Eiichi Kodera

    IPC: G02F1/225 ,  H05K1/11

    CPC classification number: G02F1/2255 ,  G02F1/035 ,  H05K1/0219 ,  H05K1/118 ,  H05K3/363 ,  H05K3/366 ,  H05K2201/09172 ,  H05K2201/094 ,  H05K2201/09481 ,  H05K2201/09618 ,  H05K2201/0969

    Abstract: A first circuit board has an electrode pattern, a ground pattern, a first through hole, and a second through hole. The first through hole penetrates through the electrode pattern. The second through hole penetrates through the ground pattern. A second circuit board has a signal line, an electrode terminal, and a ground terminal. The electrode terminal is extended from the signal line, and is electrically connected to the electrode pattern with the electrode terminal being inserted into the first through hole. The ground terminal is electrically connected to the ground pattern with the ground terminal being inserted into the second through hole, and has a width, a length, or an area or any combination thereof larger than a width, a length, or an area or any combination thereof of the electrode terminal.

    Abstract translation: 第一电路板具有电极图案，接地图案，第一通孔和第二通孔。 第一通孔穿过电极图案。 第二个通孔穿过地面图案。 第二电路板具有信号线，电极端子和接地端子。 电极端子从信号线延伸，并且电连接到电极图案，电极端子被插入到第一通孔中。 接地端子与接地图形电连接，接地端子被插入到第二通孔中，并且具有宽度，长度或面积或其大于宽度，长度或面积的任何组合，或任何 电极端子的组合。

    OPTICAL MODULATOR
    34.
    发明申请
    OPTICAL MODULATOR 审中-公开
    光学调制器

    公开(公告)号：US20150261019A1

    公开(公告)日：2015-09-17

    申请号：US14630024

    申请日：2015-02-24

    Applicant: Fujitsu Optical Components Limited

    Inventor： Yoshihiko YOSHIDA ,  Masaharu Doi ,  Yoshinobu Kubota ,  Masaki Sugiyama

    IPC: G02F1/035 ,  G02F1/055 ,  G02F1/03

    CPC classification number: G02F1/035 ,  G02F1/0316 ,  G02F1/0553 ,  G02F1/225

    Abstract: An optical modulator includes a substrate, an electrode, and an optical waveguide. The substrate includes a flat portion and a protruding portion protruded from the flat portion. The electrode is supported by the protruding portion. The optical waveguide is formed inside the protruding portion and waveguides light to be modulated with a voltage applied to the electrode. The protruding portion contains a part, present on the side of the electrode, of a light distribution region over which the light waveguided by the optical waveguide is distributed. A height of a tip of the protruding portion from the flat portion is smaller than a width of the light distribution region along a protruding direction of the protruding portion. A width of the tip of the protruding portion is smaller than a width of the light distribution region along a direction perpendicular to the protruding direction of the protruding portion.

    Abstract translation: 光调制器包括基板，电极和光波导。 基板包括平坦部分和从平坦部分突出的突出部分。 电极由突出部支撑。 光波导形成在突出部分的内部，并且以施加到电极的电压对要调制的光进行波导。 突出部分包含在电极侧存在由光波导波导的光分布在其上的光分布区域的一部分。 突出部的前端部的平坦部的高度比突出部的突出方向的宽度小于配光区域的宽度。 突出部分的尖端的宽度小于沿着与突出部分的突出方向垂直的方向的光分布区域的宽度。

    Optical device and optical communication apparatus
    37.
    发明授权
    Optical device and optical communication apparatus 有权

    公开(公告)号：US11852878B2

    公开(公告)日：2023-12-26

    申请号：US17840178

    申请日：2022-06-14

    Applicant: Fujitsu Optical Components Limited

    Inventor： Masaki Sugiyama

    IPC: G02B6/28 ,  G02B6/42 ,  G02B6/293

    CPC classification number: G02B6/4215 ,  G02B6/2813 ,  G02B6/29349 ,  G02B6/4287

    Abstract: An optical device includes a modulator and a tap coupler. The modulator includes an optical waveguide that is formed of a thin-film lithium niobate (LN) substrate and through which light passes, and an electrode that applies voltage to the optical waveguide, and modulates a phase of light that passes through the optical waveguide in accordance with an electric field in the optical waveguide, where the electric field corresponds to the voltage. The tap coupler includes at least a part formed of the thin-film LN substrate, and splits a part of the light that passes through an inside of the optical waveguide. The tap coupler includes a delayed interferometer that splits a part of the light that passes through the optical waveguide, at a split ratio corresponding to a phase difference of light that passes through an inside of the tap coupler from the optical waveguide.

    OPTICAL DEVICE AND OPTICAL COMMUNICATION DEVICE
    39.
    发明申请
    OPTICAL DEVICE AND OPTICAL COMMUNICATION DEVICE 有权

    公开(公告)号：US20220397782A1

    公开(公告)日：2022-12-15

    申请号：US17718859

    申请日：2022-04-12

    Applicant: Fujitsu Optical Components Limited

    Inventor： Masaki Sugiyama

    IPC: G02F1/035

    Abstract: An optical device includes an optical waveguide, a buffer layer that is layered on the optical waveguide, and an electrode that is arranged on a surface of the buffer layer that is layered in a part near the optical waveguide and that applies an electric signal to the optical waveguide. The optical device further includes a slit that is formed in the buffer layer, that extends from the surface of the buffer layer to a vicinity of the optical waveguide, and that is filled with part of the electrode.

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