7717

7189

كارشناسي ارشد

الكترونيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1391

ده،126ص.: مصور،جدول،نمودار﴿رنگي﴾

ص.ع.به فارسي و انگليسي

اصغر غلامي

رضا صفيان

22/2/92

رسول دهقاني، ذاكر حسين فيروزه

مهندسي برق و كامپيوتر

ID7189

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Simulation and Implementation of Silicon Optical Bench for VCSEL to MMF and photodiode to MMF optical coupling Shirin Afyouni Akbari s afyouniakbari@ec iut ac ir Date of Submission Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Asghar Gholami gholami@cc iut ac ir Abstract Growing demand for more bandwidth has led to extensive research in the field of optical communication Optical communication systems are divided in two categories fiber optic communication systems in which light is propagated in leading channels as ordinary single and multimode optical fibers and Free Space Optical communication which uses the air as communication channel High speed affordable cost to implement does not require a spectrum license safe communication light weight and immunity to electromagnetic interference EMI are the most advantages of the fiber optical communication systems The biggest problem in free space optical communication is due to its propagated channel Atmosphere channel is unstable and the channel characteristics change by time season and weather conditions Fiber optic communication systems have a quasi stable channel but in these systems to have an acceptable optical power in the fiber a good coupling between the light source and fiber in transmitter side and between fiber and detector in receiver side should be created Using Silicon Optical Bench is a practical method to assembly transmitter and receiver side with a suitable coupling efficiency In this thesis fiber optic communications systems and silicon optical benches are fully introduced and a 6 8 0 5 mm3 silicon optical bench includes four v grooves in transmitter side for parallel coupling between Multi Mode Fibers and VCSEL array and four v grooves in receiver side for parallel coupling between the Multi Mode Fibers and PIN photodiodes is designed and implemented Wave propagation and ray tracing method are used to investigate such systems Wave propagation method is more accurate and sophisticated than ray tracing Since the dimension of multi mode fiber is much larger than the VCSEL wavelength results of simulation with ray tracing are also an acceptable accuracy Therefore by using ray tracing method VCSEL to MMF and PIN photodiode to MMF coupling in the transmitter and receiver side respectively are investigated Different misalignment as longitudinal transversal and angular misalignment and fiber angular rotation and fiber end facet angle misalignment are considered in our simulation Design and Implantation process of Silicon Optical Bench is explained in detail Finally data of simulation results were compared with the measurement results Keywords Silicon Optical Bench Active Alignment Passive Alignment Ray tracing VCSEL Photodiode Multi Mode Fiber Coupling efficiency

اصغر غلامي

رضا صفيان

رسول دهقاني، ذاكر حسين فيروزه