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University of Ulm INVESTIGATIONS INTO MATRIX-ADDRESSABLE VCSEL ARRAYS PDF

127 Pages·2014·5.16 MB·English
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V E R SITÄT NI U U L M · · O S D C I N E A N D R O U C · · D ODNE C O University of Ulm INVESTIGATIONS INTO MATRIX-ADDRESSABLE VCSEL ARRAYS Master Thesis by Shamsul Ara(cid:2)n Faculty of Engineering Science Institute of Optoelectronics INVESTIGATIONS INTO MATRIX-ADDRESSABLE VCSEL ARRAYS Master Thesis Submitted by Shamsul Ara(cid:2)n Matriculation No. 611852 Communication Technology March, 2008 Presented to Institute of Optoelectronics Examiner: Prof. Dr. -Ing. K.J. Ebeling Supervisor: M.Sc. Abdel-Satter Gadallah I hereby declare that I have completed this work independently and using only the aids included. Any passages that have been extracted or cited from other sources have been referencedappropriately. Ulm,March31,2008. ....................................... (ShamsulAra(cid:2)n) This work is dedicated to- my loving parents and my youngest sister. Their love and sel(cid:3)ess support made this work possible. Acknowledgements First, all praise to God, the most Gracious and most Merciful, whose help and guidance iseverdominatingthroughoutmylife. I would like to express my sincere gratitude to Abdel Satter Gadallah, M.Sc., for being my advisor. Throughout this work I got the invaluable support, perfect guidance, useful ff suggestions,magni(cid:2)centcooperation,continuoussupport,e ectiveadvice,propersuper- vision and consistent encouragement from him. I am really grateful to him for his great assistanceduringthethesisperiod. I was fortunate to be supervised by Dr.-Ing Rainer Michalzik with his gentle guidance, strongencouragementandgreatmotivation. IamdeeplyindebtedtoProf. Dr.-Ing. K.J.Ebelinggrantingmetheopportunitytodomy M.Sc. thesisinhisdepartment. Ispeciallythankherwhosecontributioninthisworkwasunforgettableandwhosehelping attitude was admirable, whose guidance was very spontaneous. She is none but Dipl.- Ing.AndreaKroner. IwouldliketoconveymyheartfeltthankstoDipl.-Ing.HendrikRoscher,Dipl.-Ing.Ihab Kardosh, Dipl.-Ing. Wolfgang Schwarz, Sussane Menzel and all other members of the OptoelectronicsDepartmentfortheircontinuoussupportduringthethesisperiod. I am also grateful to Dr. Katrin Reimer and Prof.Dr.-Ing.Hermann Schumacher for orga- nizingthenecessary(cid:2)nancialsupportduringthesesixmonths. I would also like to remember his name whose presence made me active and jubilant duringthethesisperiod. Heismycolleagueandfriend,Ahmed-AlSamaneh. Finally,Iappreciatemyfamily'ssupportandloveinthetwoyears'M.Sc. program. i

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Each 4 x 4 array will be called as one unit cell from now. However . In order to reduce the uncertainty one extra mask, polyimide safety mask (shown . Obviously the basic process consists of using hydrogen per- . transported by inert and carrier N2 gas into the hot furnace where the temperature wil
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