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8/7/2019 DESIGN ASPECTS OF OPTICAL ROUTER USING MEMS
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PRESENTED BY:
K.NITIN REDDY K.PADMAVATHI
III/IV B.TECH, ECE III/IV B.TECH,ECE
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CONTENTS:y INTRODUCTIONy WHAT ARE MEMS?y ARCHITECTURE OF OPTICAL ROUTERy ROUTER DESIGN ISSUES
>Filter design>Electrostatic actuator design>Circulators and couplers>Optical switch
y ADVANTAGESy CHALLENGESy APPLICATIONSy CONCLUSION
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INTRODUCTION
yWhat is a router?
yNeed of optimum utilisation of networkresources
yPossible solutions to the problems
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Performance trends
Router capacity
x2.2/18 months
DRAM access rate x1.1/18 m
Moores lawx2/18 m
1
10
100
1000
1990 1992 1994 1996 1998 2000 200
Relative performance increase
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WHATARE MEMS?yMEMS is the integration of sensors ,
actuators and electronics on common
silicon substrate through microfabricationtechnology.
ySystems-on-a-chip
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SYSTEM ARCHITECTURE OF OPTICAL ROUTER
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ROUTERDESIGN ISSUESy FILTERDESIGN
>Different availabletechnologies
>Proposed Structureof Bragg mirrors
>Materials forrealizing bragg
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y
ELECTROSTATICACTUATORDESIGN>Objective
>How is it achieved?
>S
pring constant K=2ehw3
/ l
3
>FP=V2 (Awh /2g2 )
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y CIRCULATORSAND COUPLERS
>Faraday rotator
>birefringence elimination
>splitting pulses
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Optical router
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ADVANTAGESy Among many benets ofMEMS technology that were
Reviewed as core success factors,the ones that stand
Out are:
y (1)arrayability,which is the term that we use for theability to place tiny devices in large-scale arrays;
y (2)recongurability, i.e.theabilitytorecongure
theoptical properties,spatiallyandtemporally,
y Vialocalized micro-actuation and/ordeformation;
and
y (3)nanoscale precision control of positionandalign-
ment for microscaledevices,which we willrefer
toasnanopositioning.
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Optical switch
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APPLICATIONSy PETABIT-PER-SECOND ROUTERS
y RESTORATION IN EVENTOFFIBRE BREAKS
y NETWORKMONITORING
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Challenges in MEMS technologyy Advanced Simulation and modeling tools
y Packaging needs improvement
y Though started in 1960s, the amount ofR&Dinvestment has begun only in the past 10 years
y Multidisciplinary study
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CONCLUSIONy The future information technology requires faster
and smarter communication networks,which may only
Be obtained through all opticalnetworking withmoreSophisticated opticalfunctionalities,suchas intelligent
Opticalsignalprocessing and adaptiveoptics.Integra-
tionofoptical deviceswithMEMStechnology will
Accomplish this goal if they are designed with well-
dened opticalfunctionality and theproperuse of ma-
terials and processes.