公开(公告)号：US20240063604A1

公开(公告)日：2024-02-22

申请号：US18232927

申请日：2023-08-11

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Jungwon KIM ,  Igju Jeon ,  Changmin Ahn

IPC: H01S5/0687 ,  H01S5/183 ,  G01J1/02 ,  G01J1/04

CPC classification number: H01S5/0687 ,  H01S5/18355 ,  G01J1/0228 ,  G01J1/0238 ,  G01J1/0425

Abstract: Provided is a laser stabilization apparatus including an optical fiber resonator that is in the form of an optical fiber loop with an optical fiber delay-line, and is designed to resonate at a stabilized frequency of a laser, wherein when light emitted from the laser is input to the optical fiber resonator, a transmittance thereof changes according to a frequency of the input light, and a light measurer configured to measure light output from the optical fiber resonator and generate an error signal for stabilizing a frequency of the laser.

公开(公告)号：US11902495B2

公开(公告)日：2024-02-13

申请号：US17333153

申请日：2021-05-28

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jungwon Kim ,  Yongjin Na ,  Hyunsoo Kwak ,  Changmin Ahn

IPC: H04N13/25 ,  H04N13/257 ,  G01S7/4861 ,  G01S17/894

CPC classification number: H04N13/257 ,  G01S7/4861 ,  G01S17/894

Abstract: An ultrafast camera system includes a sensor head that injects an optical pulse train input from a pulsed laser onto a surface of a measurement target and outputs an optical signal reflected from the surface, and a timing detector that receives the optical signal whose time-of-flight is changed after passing through the sensor head and outputs an electrical signal corresponding to a timing error between the optical signal and a reference signal. Another ultrafast camera system includes a wavelength dispersion device to disperse an optical pulse train of a pulsed laser into a wavelength spectrum, a lens that vertically injects continuous wavelength signals dispersed into the wavelength spectrum onto a measurement line, and a timing detector that receives an optical signal including the continuous wavelength signals reflected from the measurement line, and outputs a timing error between the reference signal and the continuous wavelength signals as a signal intensity.