公开(公告)号：US09335475B2

公开(公告)日：2016-05-10

申请号：US14482616

申请日：2014-09-10

Applicant: Oki Electric Industry Co., Ltd. ,  National Institute of Advanced Industrial Science and Technology ,  Photonics Electronics Technology Research Association

Inventor： Hideki Ono ,  Tsuyoshi Horikawa ,  Naoki Hirayama

IPC: G02B6/136 ,  G02B6/122 ,  G02B6/124 ,  G02B6/126 ,  G02B6/30 ,  G02B6/12 ,  G02B6/34

CPC classification number: G02B6/1228 ,  G02B6/12002 ,  G02B6/124 ,  G02B6/126 ,  G02B6/136 ,  G02B6/305 ,  G02B6/34 ,  G02B2006/12061 ,  G02B2006/12147

Abstract: In a method of manufacturing an optical device including an optical waveguide having a core, a cladding and a light input/output part through which a light beam is input or output, a substrate is prepared which is provided with a uniform thickness of single-crystalline film having its constituent atoms forming a diamond lattice structure and its surface being neither the (111) plane nor its equivalent planes. In the single-crystalline film, a precursor structure is formed which has a precursor of light input/output part. A mask is formed such as to expose the precursor with the remaining part covered. The structure is immersed into an alkaline solution for wet etching with the (111) planes used as etch-stop planes.

Abstract translation: 在制造包括光纤的光学器件的方法中，该光学器件具有芯，输入或输出光束的包层和光输入/输出部分，制备具有均匀厚度的单晶 其构成原子形成金刚石晶格结构的膜，其表面既不是（111）面也不是其等效平面。 在单晶膜中，形成具有光输入/输出部分的前体的前体结构。 形成掩模，以使剩余部分被覆盖的前体曝光。 将该结构浸入用作用作蚀刻停止平面的（111）面的湿法蚀刻的碱性溶液中。

公开(公告)号：US20160091667A1

公开(公告)日：2016-03-31

申请号：US14865363

申请日：2015-09-25

Applicant: FUJITSU LIMITED ,  Photonics Electronics Technology Research Association

Inventor： Motoyuki Nishizawa ,  Shigeaki Sekiguchi

IPC: G02B6/36 ,  G02B6/30

CPC classification number: G02B6/3652 ,  G02B6/3692 ,  G02B6/424

Abstract: An optical fiber guide that guides an optical fiber, the optical fiber guide includes a first substrate, and a guide groove that is formed on a main surface of the first substrate, the optical fiber being insertable from one end side of the guide groove, wherein the guide groove includes a positioning unit that forms a distal end portion of the guide groove, the positioning unit having a slide inclined surface that positions the optical fiber by sliding a distal-end inclined surface of the optical fiber in contact therewith.

Abstract translation: 一种光纤引导件，其引导光纤，所述光纤引导件包括第一基板和形成在所述第一基板的主表面上的引导槽，所述光纤可从所述引导槽的一端侧插入，其中， 引导槽包括形成引导槽的前端部的定位单元，定位单元具有滑动倾斜面，通过使光纤的前端倾斜面滑动而使光纤定位。

公开(公告)号：US20160087398A1

公开(公告)日：2016-03-24

申请号：US14850285

申请日：2015-09-10

Applicant: KABUSHIKI KAISHA TOSHIBA ,  Photonics Electronics Technology Research Association

Inventor： Haruhiko YOSHIDA ,  Kazuya OHIRA ,  Mizunori EZAKI

IPC: H01S5/022 ,  H01S5/026 ,  G02B6/122

CPC classification number: G02B6/29338 ,  G02B6/12004 ,  G02B6/1228 ,  G02B6/29341 ,  G02B2006/12061 ,  G02B2006/12078 ,  H01S5/0264 ,  H01S5/1075

Abstract: According to one embodiment, a semiconductor light-receiving element, includes a light-receiving part provided on a substrate and having a semiconductor multilayer structure of a circular outer shape, a optical input part formed of a peripheral portion of the semiconductor multilayer structure, and having a tapered front end, and a silicon-thin-line waveguide configured to couple light with the optical input part. The waveguide includes a linear part extending through the optical input part to an at least one area of an upper-side area and a lower-side area of the light-receiving part, and a spiral part connected to the linear part and formed in the at least one area.

Abstract translation: 根据一个实施例，半导体光接收元件包括设置在基板上并具有圆形外形的半导体多层结构的光接收部分，由半导体多层结构的周边部分形成的光输入部分，以及 具有锥形前端，以及配置成将光耦合到光学输入部分的硅 - 薄线波导管。 波导包括延伸穿过光学输入部分到光接收部分的上侧区域和下侧区域的至少一个区域的直线部分，以及连接到线性部分并形成在该光接收部分中的螺旋部分 至少一个区域。

公开(公告)号：US20160007105A1

公开(公告)日：2016-01-07

申请号：US14730680

申请日：2015-06-04

Applicant: FUJITSU LIMITED ,  Photonics Electronics Technology Research Association

Inventor： Seokhwan Jeong

IPC: H04Q11/00 ,  H04B10/60 ,  H04B10/079 ,  H04J14/02

CPC classification number: H04Q11/0005 ,  H04B10/0795 ,  H04B10/60 ,  H04B10/67 ,  H04B10/676 ,  H04J14/02 ,  H04J14/06 ,  H04Q2011/0015 ,  H04Q2011/0016 ,  H04Q2011/0035

Abstract: An optical element includes: a polarization splitter that splits light input from an input port into a first signal and a second signal according to a plane of polarization; a polarization rotator that rotates a plane of polarization of the second signal output from the polarization splitter by 90 degrees; a first optical coupler that combines the first signal output from the polarization splitter and the second signal output from the polarization rotator and splits the resultant signal into a third signal and a fourth signal with an equal amplitude; a phase controller that controls a phase of the third signal; and a second optical coupler that combines the third signal output from the phase controller and the fourth signal output from the first optical coupler and splits the resultant signal into a fifth signal and a sixth signal with an equal amplitude.

Abstract translation: 光学元件包括：偏振分离器，其根据偏振平面将从输入端口输入的光分成第一信号和第二信号; 使从偏振分离器输出的第二信号的偏振面旋转90度的偏振旋转体; 第一光耦合器，其组合从偏振分离器输出的第一信号和从偏振旋转器输出的第二信号，并将结果信号分解成具有相等振幅的第三信号和第四信号; 控制第三信号的相位的相位控制器; 以及第二光耦合器，其组合从相位控制器输出的第三信号和从第一光耦合器输出的第四信号，并将结果信号分解成具有相等幅度的第五信号和第六信号。

公开(公告)号：US11611004B2

公开(公告)日：2023-03-21

申请号：US16608801

申请日：2018-02-19

Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY ,  PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION

Inventor： Takeru Amano ,  Akihiro Noriki

IPC: H01L31/0232 ,  G02B6/43 ,  H01S5/022 ,  H01L27/15

Abstract: A circuit board (100) has a first surface (102). A semiconductor chip (200) (first semiconductor chip) is located at the first surface side (102) of the circuit board (100). An insulating layer (300) covers the first surface (102) of the circuit board (100) and the semiconductor chip (200). A conductive path (310) (first conductive path) is electrically connected to the semiconductor chip (200) and extends in the insulating layer (300). A waveguide (320) is optically coupled to the semiconductor chip (200) and extends in the insulating layer (300).

公开(公告)号：US11343009B2

公开(公告)日：2022-05-24

申请号：US17197282

申请日：2021-03-10

Applicant: FUJITSU LIMITED ,  Photonics Electronics Technology Research Association

Inventor： Tomoyuki Akiyama ,  Shoichiro Oda

IPC: H04B10/08 ,  H04J14/02 ,  H04B10/079 ,  H04B10/564 ,  H04J14/06 ,  G02B6/12

Abstract: An optical communication component includes three or more couplers, a pair of waveguides, a phase shifter, a detector, and a controller. Each of the couplers multiplexes two input optical signals and two-branch outputs the multiplexed optical signals. Each of the pair of waveguides connects between the couplers and outputs each of the optical signals two-branch output from one of the couplers to another one of the couplers. The phase shifter, included in each of the waveguides, adjusts a phase amount of each of the optical signals passing through the waveguides. The detector detects an amount of power of the optical signal that has been subjected to phase adjustment and that is two-branch output from a most downstream coupler, from among the couplers, located in the traveling direction of the optical signal. The controller controls, based on the detected amount of power, each of the phase shifters.

公开(公告)号：US11119278B2

公开(公告)日：2021-09-14

申请号：US16884244

申请日：2020-05-27

Applicant: FUJITSU LIMITED ,  Photonics Electronics Technology Research Association

Inventor： Tomoyuki Akiyama

IPC: G02B6/293 ,  H04J14/02

Abstract: An optical demultiplexer is disclosed that separates light including a plurality of wavelengths into light of respective wavelengths. Unit circuits are cascaded in a tree structure. In optical demultiplexer components having the same structure, a combination of arm length differences in waveguide pairs is the same with respect to the N−1 Asymmetric Mach-Zehnder interferometers in which the phase shifters are arranged, where N equals number of 2×2 couplers. In three of the optical demultiplexer components in at least one of the unit circuits, N is three or more. Each of control circuits controls the phase shifters arranged in a corresponding optical demultiplexer component of a corresponding unit circuit in order to increase or decrease a value of a function having, as an argument, a power value acquired by a monitor from among monitors arranged at four optical waveguides at an output side of the corresponding unit circuit.

公开(公告)号：US11009726B2

公开(公告)日：2021-05-18

申请号：US16354886

申请日：2019-03-15

Applicant: NEC CORPORATION ,  PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION

Inventor： Junichi Fujikata

IPC: G02F1/025 ,  G02F1/015 ,  G02B6/12

Abstract: An electro-absorption optical modulator capable of realizing optical coupling with a Si waveguide with high efficiency, improving modulation efficiency, reducing light absorption by an electrode layer and achieving low optical loss includes a substrate; a first silicon layer doped to exhibit a first type of conductivity and a second silicon layer doped to exhibit a second type of conductivity that are disposed parallel to the substrate; and a Ge1−xSix (0

公开(公告)号：US10958036B2

公开(公告)日：2021-03-23

申请号：US16174523

申请日：2018-10-30

Applicant: FUJITSU LIMITED ,  Photonics Electronics Technology Research Association

Inventor： Nobuaki Hatori

IPC: H01S5/12 ,  G02B6/42 ,  H01S5/028 ,  H01S5/34 ,  H01S5/22 ,  H01S5/343 ,  H01S5/026 ,  G02B6/12

Abstract: A semiconductor light-emitting device includes an active layer including quantum dots, a diffraction grating, a low-reflectance film disposed at a light-emitting end of the active layer, and a high-reflectance film disposed at another end of the active layer and having an optical reflectance higher than an optical reflectance of the low-reflectance film.

公开(公告)号：US20200313021A1

公开(公告)日：2020-10-01

申请号：US16817152

申请日：2020-03-12

Applicant: PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION

Inventor： Junichi Fujikata

IPC: H01L31/105 ,  H01L31/0352 ,  H01L31/0232

Abstract: A photodetector which can perform high-speed operation and make the manufacturing process thereof easy is provided. A photodetector 400 comprises an Si layer including a lateral pin junction structure, and a light absorbing layer stacked on the lateral pin junction structure. At least part of an upper part of the light absorbing layer is doped to exhibit a first conductivity type. At least part of a side wall of the light absorbing layer is doped to exhibit the first conductivity type, for making the at least part of the upper part of the light absorbing layer to be electrically connected to a region of the first conductivity type in the lateral pin junction structure.