Korea Advanced Institute of Science and Technology

Lg Electronics Inc.

Gwangju Institute of Science and Technology

Hyeonho Yoon

Hyo-Hoon Park

Nam-Hyun Kwon

Sangcheon Kim

Youngin Kim

Hyun-Woo Rhee

Joonsup Shim

Byounggoo Lee

Geum-Bong Kang

HyoHoon Park

Jong-Bum You

Kyeongjin Han

Dong-Eun Yoo

Geumbong Kang

Ju-Beom Lee

Tae Joon Seok

In Ki Kim

An optical device can include an end-fire optical phased array including an optical splitter to split an optical signal into a plurality of channels, an optical phase controller to control a phase of the optical signal transmitted from the optical splitter, and an end-fire optical radiator to radiate the optical signal transmitted from the optical phase controller. A lens can be further positioned on a path of the radiated optical signal to control a vertical divergence angle of the radiated optical signal.

Optical device

Disclosed are an optical phased array chip and a method of manufacturing the same. The optical phased array chip includes a plurality of optical switches and a plurality of optical phased arrays implemented on a single integrated circuit, wherein the single integrated circuit includes a silicon substrate, a lower layer formed on an upper portion of the silicon substrate, a silicon layer formed on an upper portion of the lower layer, a first upper layer, a second upper layer and a third upper layer sequentially arranged on the silicon layer, and an electrode that penetrates through the first upper layer while being grounded to the silicon layer and is formed on an upper portion of the first upper layer.

Optical phased array chip using MEMS switch and manufacturing method thereof

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.

Silicon-opa-based lidar for measuring distance using quasi-frequency modulation

Growing community of inventors

Daejeon, South Korea

Hyeonho Yoon