高速量子阱行波光調(diào)制器的研究.pdf

1、浙江大學(xué)博士學(xué)位論文高速量子阱行波光調(diào)制器的研究姓名：趙旭申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：王明華2001.3.1浙江尢掌博士學(xué)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