公开(公告)号：US20150316830A1

公开(公告)日：2015-11-05

申请号：US14436819

申请日：2013-10-17

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyo-Hoon PARK ,  Jong Hun KIM ,  Mu Hee CHO ,  Tae-Woo LEE

IPC: G02F1/313

CPC classification number: G02F1/3137 ,  G02B6/125 ,  G02B6/29352 ,  G02F1/313 ,  G02F3/00

Abstract: The disclosed optical logic circuit operating by controlling the reflection of light comprises: a first waveguide, at least a portion of which is formed into the shape of a straight line; a second waveguide branched at a predetermined angle from the first waveguide; and a first reflector having a refractive index that varies based on a first input signal, the first reflector selecting either the first waveguide or the second waveguide as a pathway of light. The value of the signal of a first output terminal provided through the first waveguide and the value of the signal of a second output terminal provided through the second waveguide can be adjusted using the first input signal.

Abstract translation: 通过控制光的反射来操作的公开的光学逻辑电路包括：第一波导，其至少一部分形成为直线的形状; 从所述第一波导以预定角度分支的第二波导; 以及具有基于第一输入信号而变化的折射率的第一反射器，所述第一反射器选择第一波导或第二波导作为光的路径。 可以使用第一输入信号来调整通过第一波导提供的第一输出端子的信号值和通过第二波导提供的第二输出端子的信号值。

公开(公告)号：US20230152453A1

公开(公告)日：2023-05-18

申请号：US18155064

申请日：2023-01-17

Applicant: WAY OPTICS CO., LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong Tae LEE ,  Mid Eum BAEK ,  Chang Su LEE ,  Hyo-Hoon PARK ,  Hyeonho YOON ,  Jae-Yong KIM

IPC: G01S17/26 ,  G02F1/29 ,  G01S7/481 ,  G02B6/125

CPC classification number: G01S17/26 ,  G02F1/292 ,  G01S7/4816 ,  G02B6/125

Abstract: An optical phased array device for a LIDAR sensor includes: a light source configured to irradiate a laser beam having a predetermined wavelength band; an input waveguide through which the laser beam irradiated from the light source passes; a slab waveguide disposed at an output end of the input waveguide to branch an optical signal input from the input waveguide; and a channel waveguide configured to distribute and guide the optical signal, branched by the slab waveguide, to M channels and to radiate the optical signal onto a free space. The channel waveguide may include a silia optical waveguide disposed for each of the M channels, and a length of each of the optical waveguides has a length difference ΔL from an adjacent waveguide.

公开(公告)号：US20210293959A1

公开(公告)日：2021-09-23

申请号：US16830869

申请日：2020-03-26

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyo-Hoon PARK ,  Hyeonho YOON ,  Nam-Hyun KWON ,  Kyeongjin HAN

IPC: G01S17/26 ,  G01S7/487 ,  G01S7/481

Abstract: A LiDAR device is disclosed that measures a distance based on self-heterodyne detection using coherence. According to an embodiment, the LiDAR device includes a light generator that generates a coherent transmission light source having a first frequency at a specific interval and delivers a time when frequency modulation into the first frequency is performed to a distance measurement circuit, an optical transmitter that delivers the transmission light source, delivered from the light generator, to an optical heterodyne detector and radiates the transmission light source to an object of the free space, an optical receiver that receives a reception light source where the transmission light source is reflected from the object, the optical heterodyne detector that outputs an electrical signal of a beat frequency based on the transmission light source delivered from the light generator and the reception light source delivered from the optical receiver, and the distance measurement circuit that measures a distance to the object based on the electrical signal of the beat frequency delivered from the optical heterodyne detector and the frequency modulation time delivered from the light generator.

公开(公告)号：US20210302577A1

公开(公告)日：2021-09-30

申请号：US16839277

申请日：2020-04-03

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyo-Hoon PARK ,  Hyeonho YOON ,  Nam-Hyun KWON ,  Kyeongjin HAN ,  Hyun-Woo RHEE ,  Geum-Bong KANG

IPC: G01S17/32 ,  G01S7/481 ,  G01S7/4913

Abstract: A silicon phased array based LiDAR device that measures a distance using a quasi-frequency modulation is disclosed. A LiDAR device according to an exemplary embodiment of the inventive concept includes a light source that generates an optical signal, an optical modulator that generates a first optical signal having a quasi-frequency whose a modulation frequency constantly varies with time by modulating a light intensity of the optical signal, an optical splitter that splits optical power of the first optical signal into a reference optical signal and a transmit (Tx) optical signal, an optical transmitter that receives and emits the Tx optical signal toward an object, an optical receiver that receives a receive (Rx) optical signal reflected from the object and transfers the Rx optical signal, an optical coupler that mixes the reference optical signal and the Rx optical signal, a balanced photodetector that detects an intermediate frequency from the optical signal transferred from the optical coupler and a distance calculator that obtains distance information by measuring the intermediate frequency.

公开(公告)号：US20180131084A1

公开(公告)日：2018-05-10

申请号：US15372768

申请日：2016-12-08

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Hyo-Hoon PARK ,  Hyeon Min BAE ,  Ha Il SONG ,  Dae-Seong LEE ,  Harin LEE

IPC: H01P5/107

CPC classification number: H01Q1/38 ,  G02B6/12 ,  H01P3/121 ,  H01P3/165 ,  H01P5/1022 ,  H01Q9/0485 ,  H05K1/0242 ,  H05K1/0274

Abstract: Disclosed is a printed circuit board (PCB) structure, in which an electromagnetic signal transmitting antenna and/or an electromagnetic signal receiving antenna, and an electromagnetic signal transferring tunnel (EM-tunnel) are embedded, the PCB structure including a PCB, an EM-tunnel that includes a dielectric core and a metal clad that surrounds the dielectric core and that is embedded in the PCB to be parallel to the PCB, and at least one transmitting antenna and/or at least one receiving antenna that are embedded in the PCB, wherein the transmitting antenna and/or the receiving antenna are arranged at an input port and an output port of the EM-tunnel embedded in the PCB to transmit and receive electromagnetic signals to and from the interior of the EM-tunnel.

公开(公告)号：US20170322374A1

公开(公告)日：2017-11-09

申请号：US15542673

申请日：2016-01-12

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Hyo-Hoon PARK ,  Jong-Hun KIM

IPC: G02B6/125 ,  G02B6/12

CPC classification number: G02B6/125 ,  G02B6/26 ,  G02B6/35 ,  G02B2006/12102 ,  G02B2006/12104

Abstract: A waveguide having a bi-directional optical transmission structure comprises: a main waveguide which is formed in a preset direction; a branch waveguide which is connected to at least one of both ends of the main waveguide; and a reflector which is placed at an intersection where the branch waveguide and the at least one of both ends of the main waveguide are connected, and which has a different refraction index from the refraction index of the main waveguide and the refraction index of the branch waveguide, wherein the reflector refracts or reflects in different forms the bidirectional light signals for transmission and reception, and thereby directs the light signal for transmission to the main waveguide, and separates the light signal for reception to the branch waveguide.