可调谐光纤FABRYPEROT滤波器的研制及其在FBG传感系统中的应用

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1、北京交通大学硕士学位论文可调谐光纤Fabry-Perot滤波器的研制及其在FBG传感系统中的应用姓名：宋明申请学位级别：硕士专业：光学工程指导教师：冯其波;谢芳20060301北京交通大学硕七论文Fabry—Perot滤波器的光纤光栅波长解调系统。对于业已存在的测量系统，只需要对系统硬件进行微调，并重新设计系统程序，就可以使其在不提高系统成本的情况下提高了测量精度。关键词：光纤光栅、解调系统、可调谐Fabry—Pemt滤波器、参考光纤光栅IIAbstractAbs仃actFiberBraggFating(FBG)isafiberelementwhichisdeve

2、lopingrapidlythcseycars．1tc姐be谢delyused血血cfieldsof胁ercommunicationandnbersensing．Whenbeingusedinsensingfield，FBGusesitsBragg、vavelen百hasmesensingcharacteristic．IthassomepanicularadVantagessuchashighrcsolution，imIrmn时toelectrDmagneticfields孤dlightinl舶lSitymodulation，multiplexingc印abili

3、ty，etc．Inconsequence，manyrcsearchersbelievethatFBGhasapromising如tureinengineeringinspectionfiled．WavelengtllinterrogationinstmmentisthemostimponantpanofthewholesystemaIlditspcrformanceplaysakeyroleinmep曲HnaIlceoftllewholesystem．ThisthesisaimsatimpmVingtheperformanceofFBGinterrogations

4、ystembasedonⅡleimerrogatingofatunableFab妒PemtfilteLTheprincipleof恤tuIlableFabry—Perot61terisintmducedandtheinnuenceoftlleinSenionlossontheperf．ornlanceofmetunableFabry-PerotfilterisaIlalyzed．ThcopticaltrallsfermatrixisusedtoanalyZe廿lemulti-layermembraneaswell．BaSedontheprinciples，anln

5、able丘bergrinlensFabry—Perotfilter，whichconsistsoftwogrinlensonwhichmemulti-layermembr趾eofh诎renectivityisdeposited，isdesi印edaIldf如ricated．11list11nable丘berFabry—Pemtfilterhashi曲finesse，lowinsertionloss，simplestmctll]reaIld“iseasytocOllimateanditsca“tycallbetunedinwiderange．ncanbeusedas

6、theinte丌’ogationIlI韭室窒里查兰堡主堡茎instnlmemot也e}。Bosenslngsystem．ThepdncipleofusingatunablefiberF姗-Pcrotfi腑tointeHogatetheBmggwavelengthofa助crgmtingisinnDduced．Usingthet岫ablesinglemodefiberFabry-PerotfilterwefabricatedtheFBGiIlteⅡogationsystem．Experimentsofqllas内atics删n印pliedtomeFBGaremeas

7、uredhlcludingpurestraitlexperiInemandreferenceFBGtemperaturecompensationexpe血nem．E1(perimentresultsshowt11atthereferencemetllodcanemse吐1einfluenceofthetemperaturewhenmeasuringstrain，improve也emeasurememaccuracy．Thereferencernetllod百venint11isthcsisalsocanbeusedinsomeotherimerrog砒ionsys

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