光纤光栅波、空分复用传感网络有源查询技术

《光纤光栅波、空分复用传感网络有源查询技术》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、牵文摘甏ii'il--JlllllI'Ill#中文摘要疆爨一耱裁雳光野竞潜纹爨褰囊豢竞添逶过于渗投瓣予涉谱诗簿耩长麓大小的方法，并利用最小步长为O．1“m的微动平台拉伸光纤Math．Zehnder干涉仪进行了验证。实验证明了此方法的W行性，精度达29雌，完全鼹瀵是嘉l{睾瓣调掰竞终于渗仪夔零簧。缩合干涉解调对于涉仪的骚求，制作了臂长差为3．19mm的光纤Michelson干涉仪，并将干涉仪短臂的中间小部分粘贴在愿电陶瓷上，成为扫臻予渗倥。为避受努器环壤黠于渗纹豹子挽，将于涉仪器压魄辫瓷封装在密闭的金属盒内，同时为避

2、免扫描过程中压电陶谥产生的热量对解谢结果的影响，采用了温度擦制系统对憋个干涉仪进行了控制，温度拉翻系统在工{睾毒O分辨舞金耩鑫蠹溢爱露潋达裂稳定获态，我时溢笈液动小于0．02℃。利用1×4光开关的光路选通作用眺敷可调谐光纤F。P滤波器的带邋滤波将毪，对4×10党纾竞撵缀藏鹣传慧麓终蔽璃透露了褒诲。糕鬻全光纤扫描Michelson二}二涉仪对传感信号进行了赢分辨肇解调，系统的传感灵敏度沟1,6749。^上￡，在误灌兔许范围内与理论值1．6855。，蝉基本籀符，分溪率巍5．9n￡。选择装一簧感光秘簸，爱搂控麟系统爨诞系

3、绞爨豁囱幼追踪感测髂号的能力。美键谰：巍纾嵬獗予涉瓣璃竞舜：爰波、窒分复矮商滚转感黑龙江火学硕士学位论文AbstractAsimplemethodbasedonbroadbandsourceandopticalspectrumanalyzertomeasuretheopticalpathdifference(OPD)ofafiberinterferometerwasdescribedinthispapeLStickingonearmofanallfiberunbalancedMach—Zehnderinterfer

4、ometeronatranslationstage，whenthearnlwasbeingstretched，andthenthedifl瓷rentOPDcanbegot．ThemethodWaSprovedtObeeffectiveandtheresolutionoftheOPDwas20嘲。whichWaSenoughtomeetthedemandsofmakinginterferometerusedinthedemodulationoffiberBragggrating(FBG)．Anallfiberunba

5、lancedscanningMichelsoninterferometerwiththe0pD3．19mnlwasmade，Inthecaseofeliminationofenvironmentalinterference．theinterferometerwasputinametalobtttrator．Inthecaseofeliminationoftheheatgeneratedbythep嚣whenscanning．atemperaturecontrollerwasusedtoconVolthetemper

6、atureinsidetheobturator．Tlletemperaturefluctuationthatlessthan0，02。Cwasgotafterthetemperaturecontrollerhadworked40minutes．Aspatial／wavelengthdivisionmultiplexed4xt0FBGsensorarray,actedasthereflectorofaringcavityfiberlaser,Wasinterrogatedbyemployinga1×4opticals

7、witchandatunableF-PfiltenDemodulationwasachievedbyusingtheunbalancedMichelsonscanninginterferometer氆采transforillthewavelength—shiftsignalinducedbythemeasuredstrainintophrase-shiftsignal。Thesensorsensitivityofthesystemwasdemonstratedtobe1．6749。／pe，whichagreedwi

8、ththetheoreticalvalueof1．6855。／¨￡．AfeedbacksubsystemWasintroducedtomakethesystemtrackthemeasuringFBGautomatically．Keywords：fiberBragggratinginterferometricdemodulationopticalswitch