微纳光纤谐振结构及其应用的理论和实验研究

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1、华中科技大学硕士学位论文反射光谱性能的影响做出了全面的仿真分析。创新性提出了“火焰加热拉锥普通光纤——弯曲扭转微纳光纤”的制备技术及对该MFPI结构进行“微调腔长从而改变其滤波特性”的简单调谐方法，得到高消光比、宽带平坦、易调谐的梳状滤波谱。(5)搭建了基于上述MFPI谐振结构的多波长激光器，实现了3dB带宽内42个多波长的稳定激射，室温下1小时内各波长无明显漂移，峰值功率波动不超过0.602dB。进一步地，将该MFPI滤波结构应用到可调谐多波长激光器中，通过改变MFPI结构的腔长，获得了输出激光波长个数从65到21，激光波长间隔从0.065nm到0

2、.173nm的可调谐输出；稳定性测试实验表明，室温下该可调谐多波长激光器稳定性良好，其1小时内最大功率波动仅为0.46dB。关键词：微纳光纤光纤光栅法布里-珀罗干涉仪折射率传感温度传感萨格纳克干涉仪多波长光纤激光器可调谐多波长激光器II华中科技大学硕士学位论文AbstractWiththeimprovementofdesigningtheoryandfabricationtechnology,opticaldeviceshavetendedtobemoreminiaturizedandintegrated.Micro/nanofiberhasthea

3、dvantagesofsmallfootprint,smallopticalloss,largeevanescentfields,outstandingflexibilityandhasbecomehotterandhotterinopticalfields.Meanwhile,opticalfibersensingtechnologywiththefeaturesofhighsensitivity,anti-electromagneticinterferenceperformanceandexcellentmultiplexingability,h

4、asattractedmoreandmoreattention.Owingtotheiruniqueproperties,fibergratings,fiberinterferometers,multiwavelengthfiberlasersandmanyotheropticaldeviceshavealreadybeenwidelyemployedinopticalsensingnetworks.Thisthesismainlyfocusesonthedemandofhighsensitivitysensorsandhighperformance

5、sensinglightsourcesinthenextgenerationopticalsensingnetwork.TwokindsofFabry-Perotinterferometersbasedonmicro/nanofiberhavebeendesignedandtheiropticalpropertieshavebeeninvestigatedindepth.Basedonthesemicro/nano-scaleFabry-Perotinterferometers(MFPI),fiberfilters,tunablewavelength

6、fiberlasers,refractiveindexandtemperaturesensorshavebeenachieved.Themainpartsofthisthesisarelistedasfollows:(1)Thedevelopmenthistoryofmicro/nanofiberhasbeenreviewed.Severaltypicalapplicationsofmicro/nanofiberinopticalsensingfieldsaswellasfiberlaserfieldsareintroducedindetail.Th

7、enthewaveguidemodelofmicro/nanofiberisbuiltbasedonopticalwaveguidetheory,afterwhichitsopticalfielddistributionandsensingpropertiesareinvestigatedandsimulatedthoroughly.Atlast,thefabricationtechnologyofmicro/nanofiberisdiscussedandcarriedoutexperimentally.(2)AnovelSMFBG-MNF-SMFB

8、GstructurecombiningsinglemodefiberBragggrating(SMFBG)a