6380

5954

كارشناسي ارشد

الكترونيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1390

ده،143ص.: مصور،جدول،نمودار

ص.ع. به فارسي و انگليسي

اصغر غلامي

رضا صفيان

6/9/90

مهندسي برق و كامپيوتر

ID5954

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Analysis and Simulasion of Multi Mode Vertical Cavity Surface Emitting Lasers Mohamad Yazdanypoor m yazdanypoor@ec iut ac ir Date of Submission 2011 03 9 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Asghar Gholami karshen@cc iut ac irAbstract Vertical Cavity Surface Emitting Lasers VCSELs are very desirable due to their intrinsic advantagesover Edge Emitting Lasers Some of its advantages are two dimensional array ability test on chip ability small size high speed and low cost Unfortunately some problems such as drastic dependency totemperature low optical power multi transverse mode operation and etc are in related with using VCSELs Because of high power single mode laser requirement in long haul optical communication applications inthis research a novel structure using two oxide layers with different aperture sizes and locations is proposed Moreover for improving modulation speed an ion iplant area is used in proposed structure Design andanalysis methods of a lot of kinds of VCSELs are investigated and their advantages and drawbacks arediscussed as well Another problem of VCSELs is lack of a comprehensive and circuit level model for it Soa more complete model is suggested here involving important effects such as self heating satial holeburning thermal lensing self focusinf and etc Moreover some solutions are proposed to minimize theeffect of these unwanted phenomena From our knowledge no one model thermal lensing and self focusing The static and dynamic behaviour of VCSEL is investigated and modulation responses of vertical modesare inspected Then the model is changed to an HSPICE model which is very useful for driver design Another feature of this model is a superior electrical model for VCSEL Influence of current shaping isinvestigated using HSPICE VCSEL model Finally the impact of every kind of low pass filters on outputeye diagram is investigated and the performance of VCSEL is improved by optimizing band width of everyfilter Keywords VCSEL Single mode power Spatial hole burning Thermal lensing Self focusing

اصغر غلامي

رضا صفيان