公开(公告)号：US11811188B2

公开(公告)日：2023-11-07

申请号：US17333028

申请日：2021-05-28

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won Song ,  Sungjae Lee

IPC: H01S3/1115 ,  H01S3/067

CPC classification number: H01S3/1115 ,  H01S3/06745 ,  H01S3/06791

Abstract: Embodiments relate to a resonator including a graphene layer formed on a support, and a tapered fiber disposed around at least part of the support, close to the graphene layer, wherein the tapered fiber has different paths along which light travels in a region extending from one end and a region extending from the other end, and a passive-mode-locked pulse laser oscillation system including the same.

公开(公告)号：US10481419B1

公开(公告)日：2019-11-19

申请号：US16249900

申请日：2019-01-17

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won Song ,  Sungjae Lee

IPC: G02F1/01

Abstract: Embodiments are directed to a method for manufacturing a graphene electro-optic modulator, which is freely attachable to and detachable from an optical waveguide and modulates a light according to an electric signal. The method includes: forming two metal electrodes on an oxide film formed on a substrate, the two metal electrodes being spaced apart from each other; synthesizing a first graphene film at a metal foil; coating the first graphene film with a polymer membrane; removing the metal foil at which the first graphene film is synthesized; and transferring the first graphene film coated with the polymer membrane onto the oxide film, wherein the first graphene film is electrically connected to any one of the two metal electrodes. There is also provided a graphene electro-optic modulator manufactured by the method.

公开(公告)号：US12092623B2

公开(公告)日：2024-09-17

申请号：US17376165

申请日：2021-07-15

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won Song ,  Sungjae Lee

IPC: G01N33/00 ,  G02B6/12 ,  G02B6/38

CPC classification number: G01N33/005 ,  G02B6/12004 ,  G02B6/3845 ,  G02B2006/12121 ,  G02B2006/12138 ,  G02B2006/12159

Abstract: Embodiments relate to an optical sensor for sensing hydrogen gas, which includes an optical fiber through which light moves; a ferrule formed at one end of the optical fiber to surround the optical fiber; and a sensor module configured to form an interference wave according to a Fabry-Perot interferometer with respect to light that moves through the optical fiber, wherein the sensor module includes a sensing material that expands and contracts by reacting with hydrogen gas, and spectrum periodicity of the interference wave changes according to a volume change of the sensing material, and a hydrogen gas detection system including the optical sensor.

公开(公告)号：US11217961B2

公开(公告)日：2022-01-04

申请号：US16840451

申请日：2020-04-06

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won Song ,  Sungjae Lee

IPC: H01S3/067 ,  H01S3/10

Abstract: Embodiments relate to a noise suppressor for suppressing noise of an optical signal, including a core through which the optical signal travels, a clad that is wrapped around the core and configured to expose part of the core, and a graphene layer formed on the part of the core, and a digital optical signal generation system including the same.