Title:
OPTICAL WAVELENGTH MEASUREMENT DEVICE USING ABSORPTIVE OPTICAL FIBER-BASED DOUBLE OPTICAL FIBER FILTER MODULE, OPTICAL SENSOR SYSTEM COMPRISING SAME, AND OPTICAL MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2023/096353
Kind Code:
A1
Abstract:
The present invention relates to an optical wavelength measurement device using an absorptive optical fiber-based double optical fiber filter module, an optical sensor system comprising same, and an optical measurement method. The optical wavelength measurement device for measuring signal light generated from an optical fiber sensor of an optical fiber sensor system comprises: a first optical splitter for splitting the signal light provided from the optical fiber sensor into first and second split light beams; a first optical detector for detecting the first split light beam output from the first optical splitter; a polarization controller installed on the optical path of the second split light beam output from the first optical splitter and controlling the polarization state of the second split light beam; a second optical detector for detecting the second split light beam in which the polarization has been controlled by the polarization controller; and a calculation module for calculating the optical wavelength of the signal light on the basis of information detected by the first and second optical detectors and calculating, from the optical wavelength, a physical quantity applied to the optical fiber sensor.
Inventors:
KIM BOK HYEON (KR)
LEE CHANG WON (KR)
LEE CHANG WON (KR)
Application Number:
PCT/KR2022/018629
Publication Date:
June 01, 2023
Filing Date:
November 23, 2022
Export Citation:
Assignee:
GWANGJU INST SCIENCE & TECH (KR)
International Classes:
G01D5/353; G01J3/02; G02B6/293
Foreign References:
| KR101072747B1 | 2011-10-11 | |||
| KR20150146468A | 2015-12-31 | |||
| US9441948B2 | 2016-09-13 | |||
| US10054516B2 | 2018-08-21 | |||
| US20180094987A1 | 2018-04-05 |
Attorney, Agent or Firm:
G1 IP LAW FIRM (KR)
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