公开(公告)号：US20150214693A1

公开(公告)日：2015-07-30

申请号：US14674306

申请日：2015-03-31

Applicant: Korea Research Institute of Standards and Science

Inventor： Kee-Suk HONG ,  Dong-Hoon Lee ,  Seongchong Park ,  Seung-Nam Park ,  Seung-Kwan Kim

IPC: H01S3/13 ,  G02F1/125 ,  H01S3/00

CPC classification number: H01S3/1305 ,  G02B6/14 ,  G02F1/125 ,  H01S3/005 ,  H01S3/0085 ,  H01S3/10 ,  H01S3/13 ,  H01S3/1306

Abstract: A pulse laser output stabilizing apparatus including a directional coupler to receive output of pulse laser, the output branching into a first optical path and a second optical path, a photodetector to receive light branching into the first optical path and output current according to intensity of the light, a current-voltage converter to convert output current of the photodetector into a voltage and output converted voltage, a function generator to provide an output proportional to output signal of the current-voltage converter with a predetermined frequency, a time delay unit on the second optical path providing a predetermined time delay for feedback control, and an acousto-optic tunable modulator to receive output signal of the functional generator and optical signal from the time delay unit as an input and modulate and output the optical signal from the time delay unit according to amplitude of the output signal of the function generator.

Abstract translation: 一种脉冲激光输出稳定装置，包括定向耦合器以接收脉冲激光器的输出，分支到第一光路和第二光路中的输出，光接收器，用于接收分支到第一光路中的光，并根据 光，电流 - 电压转换器，用于将光电检测器的输出电流转换为电压和输出转换电压;功能发生器，用于以预定频率提供与电流 - 电压转换器的输出信号成比例的输出;时间延迟单元， 提供用于反馈控制的预定时间延迟的第二光路;以及声光可调谐调制器，用于接收功能发生器的输出信号和来自时间延迟单元的光信号作为输入，并且调制并输出来自时间延迟单元的光信号 根据函数发生器的输出信号的幅度。

公开(公告)号：US20190341734A1

公开(公告)日：2019-11-07

申请号：US16403382

申请日：2019-05-03

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Kee-Suk HONG ,  Dong-Hoon LEE ,  Seongchong PARK ,  Jisoo HWANG

IPC: H01S3/00 ,  H01S3/067 ,  H01S3/11 ,  G06N10/00

Abstract: Provided are an apparatus and method for measuring quantum efficiency of a detector using a single pulse laser. Quantum efficiency of the measurement target detector may be measured from 420 nm to 1600 nm having uncertainty of 2% to 4% (K=2) by comparing the reference detector and the measurement target detector significantly different in sensitivity using a single laser pulse as a spectral light source. Also, it is possible to directly compare the two detectors with a significant difference in sensitivity through a very simple setup that causes a portion of a laser pulse output from a light source part to be absorbed by the reference detector and the laser pulse reflected from the reference detector to be irradiated to the measurement target detector.