公开(公告)号：US20200335931A1

公开(公告)日：2020-10-22

申请号：US16840451

申请日：2020-04-06

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won SONG ,  Sungjae LEE

IPC: H01S3/10 ,  H01S3/067

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.

公开(公告)号：US20240258762A1

公开(公告)日：2024-08-01

申请号：US18137027

申请日：2023-04-20

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won SONG ,  Hyowon MOON ,  Oleksiy KOVALCHUK ,  Sungjae LEE

IPC: H01S3/1118 ,  H01S3/067 ,  H01S3/094

CPC classification number: H01S3/1118 ,  H01S3/06745 ,  H01S3/06791 ,  H01S3/094003

Abstract: Disclosed are a mode-locked resonator according to an embodiment and an ultrashort pulse laser comprising the mode-locked resonator. The mode-locked resonator according to an embodiment includes a resonator including a shape of a sphere; and a saturable absorber coated on a surface of the resonator, wherein the resonator is coupled with some photons traveling in a tapered optical fiber disposed near the mode-locked resonator and interacts with the saturable absorber based on a Whispering Gallery Mode (WGM).

公开(公告)号：US20220140564A1

公开(公告)日：2022-05-05

申请号：US17333028

申请日：2021-05-28

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Yong-Won SONG ,  Sungjae LEE

IPC: H01S3/11 ,  H01S3/067

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：US20220018821A1

公开(公告)日：2022-01-20

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 ,  G02B6/38 ,  G02B6/12

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.