干涉型光纤水听器相位载波调制解调技术研究

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1、喻尔滨工程大学硕士学位论文摘要随着潜艇消噪声技术的不断提高，迫切需鹱研制鼹敏度极离的探测器对其进宰亍落距离定经，竞纤承氍器鹣藤藿委楚适应了这一要求。捧为灏—最豹海域声搽测器，光纤水听器必须具有极高的灵敏度和较大的动态范围。逶过严密翡数攀接导积彷囊努掇，对壹接谖裁竞溅产生秘整装渡戆通赫一餐德尔(Mach-Zehnder)和迈克尔逊0mc№lson)两种干涉型光纤水晰器调制解调技术避行了瑶究。默理谂上详缨努褥了黪蛹释谣偿号稳定性鲢主要鼹素，提出了不麓通过干涉信号的峰假或峰峰假检测来控制自动增益控制(AGC)电路增益的方法清滁糖羲衰藩黠篱爨藩号熬影拣；彷囊诗算穗了翼塞承蓬鼗震歼嚣最篷c毽。在

2、这～思想的指导下完成了相位载波(PGC)零熬解调电路各个单元的硬件竣诗，皂捺缕号兹潺矮，稳逶滤装，麓遥滤波，鼗分，程分，裙黍，榴壤等摸羧运簿。鬟终礴铡塞一套擎元干涉鍪竞纾零氍器袋缝，玄嫠鸯在隶声整号频攀莲窭爨将感兴趣的信号检测出来的能力，并且该系统对提出的一些理论进行了实验验证。经逑中科魏声学所翻中国澍麓承声计量站<毫荛翅富骝715瑟)黪溅试；零到了鞍理想的实验测试结浆。道过璨题茨磷究，积累了经验，发现了不是，提如了改进水辑器挂能翦途径和方法。关缝词：干涉型光纤水听器；相位载波零黧硷测技术；直撩半导体光源谪铺：撼攘衰弱哈尔滨工程大学硕士学位论文ABSTRACTWiththeimprov

3、ementofthetechnologyforsubmarinetoeliminatenoise，itisurgentlytofindoutakindofsensorwithhighsensitivitytoorientsubmarinefromlongdistance．Fiberoptichydrophoneisjustsuitforthisrequest．Asanewageofacousticdetector，itmusthavehighsensitivityandlargedynamicrange．Throughrigorousmathematicalcalculationand

4、simulation，thephasemodulationanddemodulationofinterferometricMach—ZehnderandMicbelsonfiberoptichydrophoneusingphasegeneratedcarrier(POe)techniquewithdirectsourcemodulationisdescribed．Themainfactorsaffectingthestabilityofdemodulationsignalareparticularanalyzedintheory．Itisfoundinfeasibletoovercom

5、ethepolarization-inducedfadinginfluenceonoutputsignalthroughAGCcircuitswhichusepeakorpeak—peakofinterferometricsignaldetectionmethodtocontrolthegainofAGCcircuits．ThebestbesselfunctionexpandedvalueofCisgetthroughsimulation．Inthisway，thedesignofunitphasegeneratedcarrier(PGC)homodynedemodulationciF

6、CUitsiScompleted，includinganalogueoperationssuchassignalmixer，lowpassfi]ter，highpassfilter，differentiator，integrator，multiplier，subtracter，andsoon．Finally，asingleinterferometricfiberoptichydrophonesystemiscompleted．Thesystemhastheabilitytodetecttheinterestedsignalsinthefrequencyrangeofacousticsi

7、gnalsunderwater．Simultaneously，sometheoriesaretestedandverifiedonthissystem．ThroughthetestofInstituteofAcoustics，ChineseAcademyofSciencesandNationaldefenceunderwateracousticsMetrologyCenter(the715InstituteofHangzhou，Fuyang)，