高速量子阱行波光調制器的研究.pdf

1、浙江大學博士學位論文高速量子阱行波光調制器的研究姓名：趙旭申請學位級別：博士專業(yè)：微電子學與固體電子學指導教師：王明華2001.3.1浙江尢掌博士學位論文摘要AbstractTheIntemetandespeciallytheWorldWideWebaredramaticexamplesofnewmodesofcommunicationthathaveplacedheavydemandsonthecurrentinfrastructur

2、eAndoptoelectronicdevicesarethebasisoftheinffastructureThedevelopmentofsemiconductorlasersandfiberopticcommunicationshasfueledanincreasinginterestinoDtoelectronicsinbothresearchanddevelopmentgroupsExtemalopticalmodulator

3、sarecurrentlydesirableforlong—haulfiberswitching10calareanetworks，consumerelectronics，imaginganddisplaytechnologySomeofthenecessarycharacteristiCSofaswitchingsysteminwhichextemalopticalmodulatorsdisplaydistinctadvantages

4、are：lOWchirpparameterlowpowerrequirements，lowinsertionlossandlargecontrastratioInaddition，suchopticalmodulatorsshouldhavedesirableopticalbandwidthandiOWdrivingvoltageThisdissertationiSmainlyabouttheoreticalresearchOilhig

5、hspeedtravelingwaveelectro—opticwaveguideintensitymodulatorsemployingIII—Vcompoundsemiconductorquantumwellswhichincludethedesignofquantumwellmaterialstructuresandinvestigationonelectricalandopticalpropertiesofthesemodula

6、torsAccordingtotheresearchresults，wefabricatedthedevices，andsomemeasurementsalsohavebeendone‘ThemodulatorsresearchedinthisworkrelyonthequantumconfinedStarkeffecttogeneratefield—inducedrefractiveindexchangeAlloureffortsar

7、edirectedtowardsmaximizingthefield—inducedreffactiveindexchangeofthequantumwellstructureForquantumwellwaveguidemodulators，theoreticalanalysisweredevelopedforoptimizingthefield—inducedrefractiveindexchangeandabsorptionIOS

8、SThisresearchinvestigatesthephysicsofquantumwelldesignbycomparingtheStarkshiftsandfieldinducedelectro—opticindexchangesofsinglequantumwell，coupledquantumwell，symmetriccoupledquantumwell，andasymmetriccoupledquantumwellFin

9、allyaccordingtOtheideaweproposedtopredistributethewavefunctionsofelectronandhole，athree—coupledasymmetriccoupledquantumwelJstructureisdesignedwhichutilizetwotransitions，andthenlargerfieldinducedrefractiveindexchangethano