公开(公告)号：US20190317278A1

公开(公告)日：2019-10-17

申请号：US16470635

申请日：2017-12-19

Applicant: NEC Corporation

Inventor： Naoki KOBAYASHI

IPC: G02B6/125 ,  G02B6/12 ,  G02B6/293 ,  G02B27/00

Abstract: The purpose of the present invention is to improve gap tolerance in a directional coupler. Toward that purpose, this directional coupler has two waveguides facing across a gap, the directional coupler being characterized in that a desired gap and directional coupler length are provided from among gaps and directional coupler lengths in which the branch ratio of the directional coupler is at the maximum or in the vicinity of the maximum, a difference being provided in the propagation coefficients of the two waveguides in the coupling region to achieve the desired branch ratio.

公开(公告)号：US20240388057A1

公开(公告)日：2024-11-21

申请号：US18659382

申请日：2024-05-09

Applicant: NEC Corporation

Inventor： Naoki KOBAYASHI

IPC: H01S5/0236 ,  H01S5/14

Abstract: To provide a wavelength variable laser apparatus in which wet-spreading of an adhesive is suppressed when a semiconductor gain chip is mounted on a photonics element with an adhesive. A wavelength variable laser apparatus includes a semiconductor gain chip, a carrier on which the semiconductor gain chip is mounted, and a photonics element adhered to an end surface of the carrier with an adhesive. A lower end part in a longitudinal direction of the semiconductor gain chip is disposed in such a way as to face an upper end part in a longitudinal direction of the photonics element. Discontinuous shapes are formed on an area above a part of the end surface of the carrier to which the adhesive is applied.

公开(公告)号：US20170353007A1

公开(公告)日：2017-12-07

申请号：US15533885

申请日：2015-12-08

Applicant: NEC CORPORATION

Inventor： Naoki KOBAYASHI

IPC: H01S5/068 ,  H01S5/14 ,  G02F1/01 ,  H01S5/026

CPC classification number: H01S5/068 ,  G02F1/011 ,  G02F2201/06 ,  G02F2203/15 ,  G02F2203/21 ,  H01S3/083 ,  H01S3/106 ,  H01S5/02446 ,  H01S5/02469 ,  H01S5/026 ,  H01S5/14 ,  H01S5/142

Abstract: Provided is a variable wavelength laser device that achieves phase control of high precision while restraining thermal interference and stably outputs emission light of desired wavelength.The variable wavelength laser device of the present invention includes: an optical amplification means including a low-reflective surface that reflects light of wavelengths other than a predetermined wavelength and emits light of the predetermined wavelength; a wavelength control means for controlling wavelength of light being transmitted through the optical waveguide; a phase control means for controlling phase of light being transmitted through the optical waveguide using heat emitted by a heating means; a reflection means for totally reflecting the inputted light; and a heat dissipation means for restraining transfer of heat emitted by the heating means to regions other than a region in which the phase control means is disposed.

公开(公告)号：US20170018907A1

公开(公告)日：2017-01-19

申请号：US15123814

申请日：2015-02-26

Applicant: NEC CORPORATION

Inventor： Naoki KOBAYASHI ,  Kenji SATO

IPC: H01S5/14 ,  G02B6/122 ,  G02B6/293 ,  H01S5/10

CPC classification number: H01S5/142 ,  G02B6/12007 ,  G02B6/122 ,  G02B6/1228 ,  G02B6/29338 ,  H01S5/1032

Abstract: Provided are: an optical waveguide that relatively easily expands a spot size and that can suppress an increase in optical coupling loss with another optical waveguide element; and an optical component and variable-wavelength laser that use the optical waveguide. The optical waveguide is provided with: a cladding member; and a core layer that is disposed within the cladding member and that is formed as an elongated body having a rectangular cross-sectional shape from a material having a higher refractive index than the material configuring the cladding member. Here, the cross-sectional shape of the core layer is characterized in having a rectangular shape in which the length in the lateral direction is at least 10 times the length in the vertical direction.

Abstract translation: 提供：相对容易地扩大光斑尺寸并且可以抑制与另一光波导元件的光耦合损耗的增加的光波导; 以及使用光波导的光学部件和可变波长激光器。 光波导设置有：包层部件; 以及芯层，其设置在所述包层部件内，并且由具有比构成所述包层部件的材料的折射率高的材料形成为具有矩形截面形状的细长主体。 这里，核心层的截面形状的特征在于，其长边方向的长度为垂直方向的长度的10倍以上的长方形。

公开(公告)号：US20160148025A1

公开(公告)日：2016-05-26

申请号：US14903348

申请日：2014-07-07

Applicant: NEC CORPORATION

Inventor： Keishi OHASHI ,  Wataru HATTORI ,  Naoki KOBAYASHI ,  Hiroshi FUKUDA ,  Yusuke TAKAHASHI ,  Yusuke KONISHI

IPC: G06K7/10 ,  G01V15/00

CPC classification number: G06K7/10366 ,  G01B7/02 ,  G01V3/12 ,  G01V15/00 ,  G06K7/10128

Abstract: An object detection system includes a reader waveguide (101) formed as an open transmission line, an RFID tag (102) placed above the reader waveguide (101), a signal strength acquisition unit (103) that acquires signal strength of a read signal read from the RFID tag (102) by electromagnetic coupling through the reader waveguide (101), and an object detection unit (104) that detects physical characteristics of an object (105) corresponding to the acquired signal strength based on a relationship between a plurality of (three or more values of) signal strength of the read signal and physical characteristics of the object to be detected.

Abstract translation: 物体检测系统包括：形成为开放传输线的读取器波导（101），放置在读取器波导（101）上方的RFID标签（102）;信号强度获取单元（103），其获取读取信号的信号强度 通过通过读取器波导（101）的电磁耦合从RFID标签（102）发送的对象检测单元（104），其根据所获取的信号强度对应于所获取的信号强度来检测物体（105）的物理特性， （三个以上的值）读取信号的信号强度和被检测物体的物理特性。

公开(公告)号：US20150303702A1

公开(公告)日：2015-10-22

申请号：US14423999

申请日：2013-08-21

Applicant: NEC Corporation

Inventor： Masahiro TANOMURA ,  Shuhei YOSHIDA ,  Kaoru SHIZUNO ,  Naoki KOBAYASHI ,  Hiroshi FUKUDA ,  Yoshinori HAMA

IPC: H02J5/00

CPC classification number: H02J50/12 ,  H01F27/02 ,  H01F38/14 ,  H02J7/025 ,  H02J17/00 ,  H02J50/70 ,  H04B13/02

Abstract: An electric power transmission device for wirelessly transmitting electric power in a highly conductive medium includes a power transmitting unit configured to wirelessly transmit electric power and a power receiving unit configured to intromit the wireless electric power transmitted from the power transmitting unit. The power transmitting unit and the power receiving unit include an electric power transmission coil and a containment member having a dielectric configured to cover the electric power transmission coil, and transmit the electric power by causing resonance at a frequency determined by impedance of the power transmitting unit, impedance of the power receiving unit, and impedance of the highly conductive medium.

Abstract translation: 一种用于在高导电介质中无线发送电力的电力传输装置包括：被配置为无线发送电力的电力传输单元和被配置为包含从电力发送单元发送的无线电力的受电单元。 电力传输单元和电力接收单元包括电力传输线圈和具有覆盖电力传输线圈的电介质的容纳构件，并且通过以由电力传输单元的阻抗确定的频率引起谐振来发送电力 ，电力接收单元的阻抗和高导电介质的阻抗。

公开(公告)号：US20180138659A1

公开(公告)日：2018-05-17

申请号：US15870231

申请日：2018-01-12

Applicant: NEC CORPORATION

Inventor： Naoki KOBAYASHI ,  Kenji SATO

IPC: H01S5/14 ,  G02B6/293 ,  G02B6/122 ,  H01S5/10 ,  G02B6/12

CPC classification number: H01S5/142 ,  G02B6/12007 ,  G02B6/122 ,  G02B6/1228 ,  G02B6/29338 ,  H01S5/1032

Abstract: Provided are: an optical waveguide that relatively easily expands a spot size and that can suppress an increase in optical coupling loss with another optical waveguide element; and an optical component and variable-wavelength laser that use the optical waveguide. The optical waveguide is provided with: a cladding member; and a core layer that is disposed within the cladding member and that is formed as an elongated body having a rectangular cross-sectional shape from a material having a higher refractive index than the material configuring the cladding member. Here, the cross-sectional shape of the core layer is characterized in having a rectangular shape in which the length in the lateral direction is at least 10 times the length in the vertical direction.

公开(公告)号：US20230314705A1

公开(公告)日：2023-10-05

申请号：US18097788

申请日：2023-01-17

Applicant: NEC Corporation

Inventor： Naoki KOBAYASHI

IPC: G02B6/12 ,  G02B6/13

CPC classification number: G02B6/12007 ,  G02B6/12004 ,  G02B6/13 ,  G02B6/29395

Abstract: In order to achieve an optical transmitter that is reduced in size and price, an optical waveguide module includes a wavelength controller that controls a wavelength of output light output from a light source, and a wavelength locker that receives an input of the output light and outputs an electric signal indicating a relation between a wavelength of the output light and a target wavelength, wherein the wavelength controller and the wavelength locker are formed as a semiconductor optical waveguide on the same semiconductor substrate.

公开(公告)号：US20190131768A1

公开(公告)日：2019-05-02

申请号：US16091171

申请日：2017-03-30

Applicant: NEC Corporation

Inventor： Naoki KOBAYASHI

IPC: H01S5/0683 ,  H01S5/14 ,  H01S5/50 ,  H04J14/02 ,  H04B10/079 ,  H04B10/61 ,  H04B10/50

Abstract: A light monitoring mechanism for monitoring light in an optical circuit (10) including a loopback mirror (12) in loopback shape to which a linear optical waveguide (11) is connected has a structure in which a tap port (15) in loopback or loop shape is placed in close proximity to a position on the loopback mirror (12) where optical lengths from a connection point between the loopback mirror (12) and the optical waveguide (11) when light travels clockwise and when light travels counterclockwise are equal, which enables extraction a part of light from the loopback mirror (12) to the tap port (15) as monitoring light without optical loss. A light monitoring mechanism having a structure that minimizes the occurrence of optical loss when extracting light for monitoring is thereby provided.

公开(公告)号：US20160253534A1

公开(公告)日：2016-09-01

申请号：US15032383

申请日：2014-06-02

Applicant: NEC CORPORATION

Inventor： Wataru HATTORI ,  Naoki KOBAYASHI ,  Hiroshi FUKUDA ,  Yusuke TAKAHASHI ,  Ryo KAWAI

IPC: G06K7/10

CPC classification number: G06K7/10366 ,  G06K7/10445 ,  G06Q10/06 ,  G06Q10/087 ,  G08B13/2462

Abstract: It is impossible to individually identify management target articles in a conventional article management system. An article management system according to the present invention includes a reader antenna that transmits and receives a radio signal; a plurality of tag sheets each including an RF tag and placed on the reader antenna; an RFID reader that reads tag information unique to the RF tag via the reader antenna; and an identification mark attached to each of management target articles and arranged between the management target articles and each tag sheet. On a surface of the identification mark that faces the tag sheets, an identification pattern for identifying the identification mark is formed of a first pattern and a second pattern having a dielectric constant or conductivity lower than that of the first pattern.

Abstract translation: 在传统的文章管理系统中，不可能单独确定管理目标文章。 根据本发明的文章管理系统包括：发送和接收无线电信号的阅读器天线; 多个标签片，每个标签片包括RF标签并放置在读取器天线上; RFID读取器，其通过读取器天线读取RF标签特有的标签信息; 以及附加到每个管理目标物品并且布置在管理目标物品和每个标签牌之间的识别标记。 在面向标签纸的识别标记的表面上，用于识别识别标记的识别图案由具有比第一图案的介电常数或导电率低的介电常数或导电率的第一图案和第二图案形成。