基于Michelson干涉仪的光纤分布式扰动传感器.pdf

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1、第44卷第1期红外与激光工程2015年1月VO1．44No．1InfraredandLaserEngineeringJan．2015Fiber-opticsensorbasedonMichelsoninterferometersfordistributeddisturbancedetectionLiQin，WangHongbo。，LiLijing，LiangSheng4，ZhongXiang(1．SchoolofInstrumentScienceandOpto—electronicsEngineering，BeihangU

2、niversity，Beijing100191，China；2．TheThirdResearchInstituteofChinaElectronicsTechnologyGroupCorporation，Beijing100015，China；3．InstituteofShanghaiAerospaceControlTechnology，ChinaAerospaceScienceandTechnologyCorporation，Shanghai200233，China；4．KeyLaboratoryofEducationM

3、inistryonLuminescenceandOpticalInformationTechnologyDepartmentofPhysics，SchoolofScience，BeijingJiaotongUniversity，Beijing100044，China)Abstract：Afiber‘opticdistributedsensorbasedonMichelsoninteferometersfordetectingthetime·varyingdisturbancewaspresentedinthepaper．T

4、heproposedsensorisconstitutedoftwoMichelsoninterferometerswithanopticalfiberdelayloop．Thedisturbancecausesaphasemodulationwhichisdetectedbytheproposedsensorandconvenedtothelocationinformation．Theinterferencesignalsreceivedbythephotodetectorsthroughcapacitivecoupfi

5、ngseparateddirectlytoeliminatetheDCcomponentarepreprocessedbythepeak-to—peakvaluecalculationmethod．ThephaseinformationofthepreprocessedsignalsisacquiredbytheHilberttransform，phaseunwrappingandthecorrespondingtrigonometricequationscalculation．Thefrequencyspectruman

6、alysisandthemathematicaloperationsarethenconductedtolocatethedisturbance．Experimentalresultsobtmnedwitha20kmlongsensingfiberarediscussedinthepaper．111eproposeddistributeddisturbancesensorhasthesignificantadvantagesofcapabilityofrealtimesensing，insensitivetothepola

7、rizationstateandlowcost．Keywords：fiber—opticdistributeddisturbancesensor；interferometricsensors；MichelsoninterferometerCLCnumber：TP212Documentcode：AArticleID：1007—2276(2015)01—0205—0S基于Michelson干涉仪的光纤分布式扰动传感器李勤1,2，王洪波。，李立京，梁生，钟翔(1．北京航空航天大学仪器科学与光电工程学院，北京100191；2．中国

8、电子科技集团公司第三研究所，北京100015；3．中国航天科技集团公司上海航天控制技术研究所，上海200233；4．北京交通大学理学院物理系发光与光信息技术教育部重点实验室，北京100044)摘要：提出并研究了基于Michelson干涉仪的应用于检测时变扰动的光纤分布式传感器。所提出的光纤传感器由两个M