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1、北京郵電大學(xué)博』:學(xué)位論文中文摘要驗(yàn)研究,分析了溫度敏感對(duì)化學(xué)濃度的影響及其去敏方法。通過(guò)測(cè)定溶液折射率的變化實(shí)現(xiàn)其對(duì)濃度的檢測(cè)。設(shè)計(jì)并實(shí)現(xiàn)了基于交叉相位調(diào)制(XPM)技術(shù)的鎖相光纖光柵傳感器解調(diào)系統(tǒng)。采用XPM技術(shù)避免了壓電陶瓷(PZT)等機(jī)械結(jié)構(gòu)的使用,大大提高了系統(tǒng)速度和可重復(fù)性,對(duì)溫度的測(cè)量精度可達(dá)O.1℃。分析了外界環(huán)境對(duì)M.Z結(jié)構(gòu)的影響,并提出以Li№03波導(dǎo)器件克服環(huán)境對(duì)干涉器件影響的改進(jìn)方案。設(shè)計(jì)了基于保偏型光纖環(huán)鏡的波長(zhǎng)解調(diào)系統(tǒng),分析了其輸入光波長(zhǎng)和輸出光功率分配特性,進(jìn)行數(shù)值仿真并搭建了解調(diào)系統(tǒng)。通過(guò)調(diào)節(jié)保偏光纖長(zhǎng)度、耦合器耦合系數(shù)、保偏光纖主軸角度,實(shí)
2、現(xiàn)對(duì)測(cè)量范圍和系統(tǒng)分辨率的調(diào)控,并能通過(guò)軟件自動(dòng)測(cè)定其結(jié)構(gòu)參數(shù)。系統(tǒng)在解調(diào)范圍大于1nln時(shí),分辨率小于lpm,測(cè)量精度小于±lpm。設(shè)計(jì)了采用保偏光纖和偏振分束器構(gòu)建干涉儀的傳感解調(diào)方案,仿真分析了系統(tǒng)結(jié)構(gòu)參數(shù)對(duì)輸出光強(qiáng)與波長(zhǎng)對(duì)應(yīng)關(guān)系的影響,并搭建實(shí)驗(yàn)系統(tǒng)。系統(tǒng)通過(guò)調(diào)節(jié)保偏光纖長(zhǎng)度、保偏光纖主軸角度,實(shí)現(xiàn)對(duì)測(cè)量范圍和系統(tǒng)分辨率的調(diào)控,在解調(diào)范圍大于1nm時(shí),分辨率小于lpm,測(cè)量精度小于±lpm?;贚abVIEW軟件平臺(tái)開(kāi)發(fā)了針對(duì)不同傳感解調(diào)方案的光纖光柵傳感解調(diào)控制軟件,成功地應(yīng)用于不同機(jī)理、不同結(jié)構(gòu)FBG傳感器的結(jié)構(gòu)參數(shù)測(cè)定、數(shù)據(jù)處理和實(shí)時(shí)二維圖像顯示。該軟件是傳感
3、系統(tǒng)能夠脫離實(shí)驗(yàn)室,進(jìn)入應(yīng)用領(lǐng)域的關(guān)鍵,具有通用性。論文最后對(duì)研究工作進(jìn)行了總結(jié),給出了進(jìn)一步研究的方向。關(guān)鍵詞:光纖布拉格光柵(FBG),啁啾光纖光柵,傳感解調(diào),光纖環(huán)鏡,偏振分束器,LabVIEWH^3,1-tJ^。j
4、J北京郵電大學(xué)博士學(xué)位論文.英文摘要ResearchofsensoranddemodulationtechnologybasedonFiberGratingAbstractThetechnologyoffibersenseisallintersectantscienceofmultiplysubjectswhichobtainsinformationfr
5、omnature,processesandrecognizesitusingasensor,anditconstitutestherebackbonesassociatedwiththecommunicationandcomputertechnology.Thistechnologymainlyreferstofiberoptics,nonlinearoptics,andcorrespondingtechnologiesoflaser,electron,computer,communication,andsignalprocessing,andSOon.Withfurthe
6、rinvestigationandapplicationofsensetechnology,thetechnologyoffibergratingsenseisdevelopingtowardthedirectionofnetwork,intelligenceandpracticality.Therefore,thetechnologyofsenseanddemodulationalsowillnecessarilydeveloptowardthedirectionofmeasuringathighspeed,highprecisionanddistribution.t·。
7、Thispaperprobesintothecharacteristicsoffiber,SenSeanditsapplicationsinthefieldofmilitaryaffairsandcivilizationapplicationsaswellaSresearchprogressathomeandabroad,andtheinvestigationonFiberBraggGratingSensoriscarriedout:analyzingthetechnologyadvantageanddisadvantageofsenseanddemodulationoff
8、ibergrating,thefurtherdirectionofinvestigationandtechnologydifficultiesunsolved;investigatingtheopticalcharacteristicsandsensemechanismoffibergratingbasedoncoupling-modetheory;summarizingtheclassificationandfabricationtechniquesoffibergrating;studyinganumberof