公开(公告)号：US20250035751A1

公开(公告)日：2025-01-30

申请号：US18676800

申请日：2024-05-29

Applicant: GIST(Gwangju Institute of Science and Technology)

Inventor： Nan Ei YU ,  Byeong Chan PARK

IPC: G01S7/481 ,  G01S17/42 ,  G01S17/89

Abstract: Disclosed is an optical phased array antenna for a lidar that outputs output light provided from a light source to a measurement object and that receives reflective light reflecting from the measurement object, the optical phased array antenna including: a combiner configured to receive output light output from the light source or to output the reflective light; a phase modulation module configured to modulate a phase of the output light input from the combiner or the reflective light that is transmitted to the combiner; and an optical input/output unit configured to output the output light modulated by the phase modulation module or receive the reflective light reflecting from the measurement object and configured to have an antenna element waveguide to which the output light or the reflective light propagates and that extends a predetermined length.

公开(公告)号：US20220155419A1

公开(公告)日：2022-05-19

申请号：US17502215

申请日：2021-10-15

Applicant: GIST (Gwangju Institute of Science and Technology)

Inventor： Nan Ei YU ,  Byeong Chan PARK

IPC: G01S7/481 ,  G02F1/295

Abstract: Provided is an optical phase array antenna including a coupling part configured to receive light from a laser generator, an optical distributor configured to distribute the light transmitted from the coupling part to a plurality of antenna element waveguides, a phase modulator configured to modulate a phase of the light transmitted through the plurality of antenna element waveguides, and a light outputter configured to output the light modulated by the phase modulator, the light outputter including the plurality of antenna element waveguides extending in one direction, wherein each of the plurality of antenna element waveguides includes a double grating antenna part in which a downward-curved portion curved downward from an upper surface and an upward-curved portion curved upward from a lower surface are repeatedly formed in the one direction.

公开(公告)号：US20240077594A1

公开(公告)日：2024-03-07

申请号：US18147592

申请日：2022-12-28

Applicant: GIST (Gwangju Institute of Science and Technology)

Inventor： Nan Ei YU ,  Byeong Chan PARK

IPC: G01S7/4915 ,  G01S7/4913 ,  G03F7/20

CPC classification number: G01S7/4915 ,  G01S7/4913 ,  G03F7/2037

Abstract: Provided is an optical phase array antenna including a coupling unit for receiving light from a light source, a light distribution unit for distributing light propagated from the coupling unit to a plurality of optical paths, a phase modulation unit for modulating a phase of the light distributed from the light distribution unit, and a light output unit that outputs the light modulated by the phase modulation unit, and includes an antenna element waveguide extending at a predetermined length through which the light propagates, and a clad layer formed to surround the antenna element waveguide, in which the antenna element waveguide has a first recessed portion recessed downward with respect to an upper surface thereof, and the clad layer has a second recessed portion recessed downward with respect to an upper surface thereof at a position adjacent to the first recessed portion.

公开(公告)号：US20220214596A1

公开(公告)日：2022-07-07

申请号：US17702288

申请日：2022-03-23

Applicant: GIST(Gwangju Institute of Science and Technology)

Inventor： Nan Ei YU

IPC: G02F1/295

Abstract: Disclosed is an array antenna which is capable of shifting a phase of light. According to one aspect of the present exemplary embodiment, an optical phase shifting array antenna includes: a receiving unit configured to distribute input light to a plurality of antenna element waveguides; a phase shifting unit configured to shift a phase of light propagated to each antenna element waveguide by applying heat to each antenna element waveguide; an output unit including a plurality of antenna elements, and configured to output the light, which is propagated to each antenna element waveguide after a phase is varied in the phase shifting unit, to each antenna element; and a base part configured to seat the receiving unit, the phase shifting unit, and the output unit.