KR970022375A - 광섬유 스트레인 분포 측정용 펄스광과 프로브광의 비트 주파수 안정화장치 - Google Patents

광섬유 스트레인 분포 측정용 펄스광과 프로브광의 비트 주파수 안정화장치 Download PDF

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Publication number
KR970022375A
KR970022375A KR1019950034675A KR19950034675A KR970022375A KR 970022375 A KR970022375 A KR 970022375A KR 1019950034675 A KR1019950034675 A KR 1019950034675A KR 19950034675 A KR19950034675 A KR 19950034675A KR 970022375 A KR970022375 A KR 970022375A
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KR
South Korea
Prior art keywords
laser diode
signal
frequency
light
feedback laser
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KR1019950034675A
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English (en)
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KR0160925B1 (ko
Inventor
정민호
무라카미 토모히로
송석용
김기열
이호범
조진기
조영기
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이준
한국전기통신공사
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Priority to KR1019950034675A priority Critical patent/KR0160925B1/ko
Priority to US08/728,441 priority patent/US5751413A/en
Publication of KR970022375A publication Critical patent/KR970022375A/ko
Application granted granted Critical
Publication of KR0160925B1 publication Critical patent/KR0160925B1/ko

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06226—Modulation at ultra-high frequencies
    • H01S5/0623—Modulation at ultra-high frequencies using the beating between two closely spaced optical frequencies, i.e. heterodyne mixing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/06837—Stabilising otherwise than by an applied electric field or current, e.g. by controlling the temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H01S5/0687—Stabilising the frequency of the laser

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Semiconductor Lasers (AREA)

Abstract

본 발명은 스트레인 분포를 측정하는 장치에 사용되는 펄스광용 레이저 다이오드와 프로브광용 레이저 다이오드의 광출력 주파수가 외부영향에 의해 변화되는 것을 레이저 다이오드의 주입 전류를 제어하므로써 레이저다이오드의 광출력 주파수를 고도로 안정화시키는 장치에 관한 것으로, 레이저 다이오드의 온도. 전류를 직접 제어하는 부문과 레이저 다이오드의 주파수 변화량을 검출하여 그 변화량에 해당되는 신호를 발생하여 이 신호를 레이저 다이오드의 주입 전류 신호로 사용하기 위하여 온도 전류 제어회로로 귀한시키는 부분으로 구성된다.

Description

광섬유 스트레인 분포 측정용 펄스광과 프로브광의 비트 주파수 안정화장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 비트 주파수 안정화장치의 구성도.

Claims (1)

  1. 스트레인 분포 측정용 광섬유에 인가되는 제1중심 주파수를 갖는 펄스광을 발생하기 위한 펄스광용 분배형 피드백 레이저 다이오드와. 상기 광섬유에 인가되는 상기 제1중심 주파수보다 브릴리언 주파수 시프트만큼 높은 제2중심주과수를 갖는 프로브광을 발생하기 위한 프로브광용 분배형 피드백 레이저 다이오드와, 상기 펄스광용 분배형 피드백 레이저 다이오드가 재1중심주파수를 가지도록 상기 펄스광용 분배형 피드백 레이저 다이오드의 구동전류 및 온도를 설정 제어하기 의한 제1온도 전류 제어회로와, 상기 프로브광용 분배형 피드백레이저 다이오드가 제2중심주파수를 가지도록 상기 프로브광용 분배형 피드백 레이저 다이오드의 구동전류 및 온도를 선정 제어하기 위한 제2온도 전류 제어회로와, 상기 펄스광용 분배형 피드백 레이저 다이오드의 출력과 프로브광용 분배형 피드백 레이저 다이오드의 출력을 합성하여 펄스광과 프로브광의 차주파수를 갖는 비트 광신호를 발생하기 위한 편광 유지커플러와, 상기 편광 유지커플러의 합성 광신호를 전기신호로 변환하기 위한 광검출기와, 상기 광검출기의 전기신호를 증폭하기 위한 증폭기와, 상기 증폭기를 통하여 증폭된 전기신호와 혼합될 상기 광검출기의 출력주파수보다 1GHz 높은 발진주파수의 신호를 발생하기 의한 국부 발진기와, 상기 증폭기의 증폭신호와 국부 발진기의 발진신호를 혼합하여 상기 증폭기의 증폭신호와 국부발진기의 발진신호의 차주파수를 갖는 신호를 발생하기 위한 믹서와, 상기 믹서의 출력신호와 중심주파수를 비교하여 비교결과에 따라 출력전압을 제어하는 주파수 판별기와, 상기 주파수 판별기의 출력전압을 적분하여 비례전류를 상기 제2온도 전류 제어회로로 부귀환하기 위한 비례 적분회로로 구성되는 것을 특징으로 하는 광섬유 스트레인 분포 측정용 펄스광과 프로브광의 비트 주파수 안정화장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019950034675A 1995-10-10 1995-10-10 광섬유 스트레인 분포 측정용 펄스광과 프로브광의 비트 주파수 안정화장치 KR0160925B1 (ko)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019950034675A KR0160925B1 (ko) 1995-10-10 1995-10-10 광섬유 스트레인 분포 측정용 펄스광과 프로브광의 비트 주파수 안정화장치
US08/728,441 US5751413A (en) 1995-10-10 1996-10-10 Beat frequency stabilizing apparatus of pulse light and probe light for measuring strain distribution of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950034675A KR0160925B1 (ko) 1995-10-10 1995-10-10 광섬유 스트레인 분포 측정용 펄스광과 프로브광의 비트 주파수 안정화장치

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KR970022375A true KR970022375A (ko) 1997-05-28
KR0160925B1 KR0160925B1 (ko) 1998-12-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100291670B1 (ko) * 1999-03-13 2001-05-15 권문구 협대역 광섬유 커플러를 이용한 레이저 다이오드 출력광파장 안정화회로

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KR100324798B1 (ko) * 2000-03-28 2002-02-20 이재승 고밀도 파장분할다중화 광통신 시스템의 광파장 제어 장치
US6917635B2 (en) * 2002-09-30 2005-07-12 Anthony Stanley Pruszenski, Jr. Producing radiation of a desired frequency with multiple sources
US7499151B2 (en) * 2006-06-05 2009-03-03 University Of Ottawa Distributed Brillouin sensor system based on DFB lasers using offset locking
US7548313B2 (en) * 2006-08-02 2009-06-16 Quang-Viet Nguyen Compact and rugged imaging Raman spectrograph
CN103759841A (zh) * 2014-01-23 2014-04-30 中国科学院半导体研究所 激光器频率稳定度测试装置
WO2017139873A1 (en) 2016-02-15 2017-08-24 Hyperion Sensors Inc. Optical sensing methods and systems for power applications, and the construction thereof
US10073006B2 (en) 2016-04-15 2018-09-11 Viavi Solutions Inc. Brillouin and rayleigh distributed sensor
US9983094B2 (en) 2016-09-09 2018-05-29 Viavi Solutions Inc. Temperature or strain distribution sensor comprising a coherent receiver to determine a temperature or a strain associated with a device under test
WO2019023794A1 (en) 2017-08-01 2019-02-07 Hyperion Sensors Inc. METHODS AND SYSTEMS FOR OPTICAL DETECTION FOR TRANSFORMERS AND THEIR CONSTRUCTION
CN110187216A (zh) * 2019-06-28 2019-08-30 中国南方电网有限责任公司超高压输电公司广州局 一种海底电缆载流量岸上模拟实验装置及方法
US11329722B2 (en) 2020-03-27 2022-05-10 Relative Dynamics Incorporated Optical terminals

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JP3500582B2 (ja) * 1992-11-05 2004-02-23 富士通株式会社 光周波数基準光源発生装置
JP3112595B2 (ja) * 1993-03-17 2000-11-27 安藤電気株式会社 光周波数シフタを用いる光ファイバ歪位置測定装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100291670B1 (ko) * 1999-03-13 2001-05-15 권문구 협대역 광섬유 커플러를 이용한 레이저 다이오드 출력광파장 안정화회로

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US5751413A (en) 1998-05-12
KR0160925B1 (ko) 1998-12-15

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