An Investigation into System-Level Trimming Issues in On-Chip - - PowerPoint PPT Presentation

An Investigation into System-Level Trimming Issues in On-Chip Nanophotonic Networks

Christopher +itta- Matthew 0arrens- and 3en4atesh A4ella

7niversity o: Cali:ornia- ;avis

p

On-Chip Photonic Network

< =>ternal ?aser < Microring Besonators

C Dhermally Sensitive C BeGuire Drimming

< Microring Drimming

C Bed Shi:t 7se Ieating C Jlue Shi:t 7se Current KnLection C ?iterature Assumes 0i>ed Cost

Overview

< !rimming (o*er ,nalysis < DechniGue to Mitigate Drimming Mroblem < Besilience in Mhotonic +etwor4s C < Conclusions

Methodology

< ;eveloped Simulator OMinta4aP < 7sed Iot-Spot RST to ;etermine Demperature

C UT VWm°K ConductanceY

Mintaka

(Floor Plan, Power)

Floor Plan Power Temperature

C YSZ[eZ \Wm[°K Spec IeatY C Steady State Solver

< Closed ?oop to Solve :or Drimming Mower < 3aried Ambient Demperature

Hot-Spot 5.0

[1] Aubain, M., et al., "In-Plane Thermal Conductivity Determination in Silicon on Insulator (SOI) structures through Thermoreflectance measurements," Materials Research Society Symposium Proceedings Volume 1267, 2010.

Baseline

< Optical Crossbar

C Z^ node- Z^ wavelengths C _R`^K Microrings C ^a^mm` Area

< Ieating

C _RSYVW°K

< Current KnLection

C Dhermal Bunaway bY°K

< Demperature Control Vindow ODCVP

Fewer Microrings

< Optical Crossbar

C Z^ node- [` wavelengths C _`cTK Microrings C ^a^mm` Area

< Ieating

C _RSYVW°K

< Current KnLection

C Dhermal Bunaway b^°K

Change Die Area

< Jaseline

C ^a^mm` Area O``mm sGP C _RSYVW°K Ieating

< Medium

C ^TTmm` Area O`Tmm sGP C _^SUVW°K Ieating

< Small

C [`^mm` Area OYamm sGP C _^SZVW°K Ieating

Partial Athermalization

< Jaseline

C _R`^K Microrings OZ^-bitP C TSTUnmW°K ;ri:t C _RSYVW°K Ieating C Dhermal Bunaway bY°K

< MMMA`

C TST`cnm W°K ;ri:t C _RSYVW°K Ieating C _[STVW°K Current KnLection

[2] L. Zhou et al., “Athermalizing and trimming of slotted silicon microring resonators with uv-sensitive pmma upper-cladding,” Photonics Technology Letters, IEEE, vol. 21, no. 17, pp. 1175–1177, Sept.1, 2009.

Partial Athermalization

< Jaseline vsS MMMA

C Joth _RSYVW°K Ieating C TS^YRV ;elta Ieating C TSTa°K ?ower Minimum D t : MMMA Demperature :or MMMA

Overview

< Drimming Mower Analysis < !echni3ue to Mitigate !rimming (roblem < Besilience in Mhotonic +etwor4s C < Conclusions

Sliding Ring Window

< Additional Bings on Joth Sides o: Spectrum < Bings Ieat

C Kncrease Current to Iold

Sliding Ring Window

< Additional Bings on Joth Sides o: Spectrum < Bings Ieat

C Kncrease Current to Iold Beduce Current Once C Beduce Current Once Ieated :or 0ull Shi:t

Sliding Ring Window

< Additional Bings on Joth Sides o: Spectrum < Bings Ieat

C Kncrease Current to Iold Beduce Current Once C Beduce Current Once Ieated :or 0ull Shi:t

< Bings Cool

C Allow ;ri:t Knitially

Sliding Ring Window

< Additional Bings on Joth Sides o: Spectrum < Bings Ieat

C Kncrease Current to Iold Beduce Current Once C Beduce Current Once Ieated :or 0ull Shi:t

< Bings Cool

C Allow ;ri:t Knitially C Kncrease Current to 0orce 0ull Shi:t

Sliding Ring Window Results

< Jaseline SBV

C ` Additional Bings per droup C _R^TK Microrings C RSY°K DCV with YTV Judget C Kncrease DCV :rom ` `°K Kncrease DCV :rom `S` K

< MMMA SBV

C _`T°K DCV with Y`V Judget C Kncrease DCV :rom ZS^°K

Overview

< Drimming Mower Analysis < DechniGue to Mitigate Drimming Mroblem < 8esilience in (hotonic 9et*or:s C < Conclusions

Resilient Photonic Networks

< Dradeo:: Surplus Jandwidth :or Besilience < Communication Mower Mostly Mrepaid

C =>ternal ?aser Static Overhead Drimming Static Overhead C Drimming Static Overhead

< 0ault Model +ecessary

C Must Kncorporate 7niGue 0eatures o: Mhotonics

Fault Model

< Microring 0aults

C Attenuation

Fault Model

< Microring 0aults

C Attenuation C O:: Besonance

Fault Model

< Microring 0aults

C Attenuation C O:: Besonance

< O:: Besonance Bings

C +on-Knter:ering

Fault Model

< Microring 0aults

C Attenuation C O:: Besonance

< O:: Besonance Bings

C +on-Knter:ering C Knter:ering

Fault Model

< Microring 0aults

C Attenuation C O:: Besonance

< O:: Besonance Bings

C +on-Knter:ering C Knter:ering

< Vaveguide 0aults

C Kncreased Attenuation

;rop Knput O0eedP Dhrough ODo ;estP ;rop

Bit Errors

< +on-Knter:ering 0aults

C Modulation eeros

< Stuc4 at One 0aults < T ! Y Jit =rrors

Modulation Ones

!1

X

!3

"Y "` "[ "` "[ "` "Y "[ "[ "[ "Y "[ "Y "Y "Y "[ Knput O0eedP ;rop ODo ;estP Dhrough O;ead =ndP

C Modulation Ones

< Stuc4 at eero 0aults < Y ! T Jit =rrors

C Beceivers

< Stuc4 at eero 0aults < Y ! T Jit =rrors

!1

X

!3

"Y "` "[ "Y "` "` Knput Dhrough O;ead =ndP

!1

X

!3

"Y "` "[ "` "[ "`

;rop Knput O0eedP Dhrough ODo ;estP ;rop

Bit Errors

< Knter:ering 0aults

C Modulation eeros

< Knter:ered ?ogical And < Knter:ering Stuc4 at One

Modulation Ones

!1

"Y

!3

"Y "` "[ "` "[ "` "Y "[ "[ "[ "Y "[ "Y "Y "[ "Y "[ "Y "[ Knput O0eedP ;rop ODo ;estP Dhrough O;ead =ndP

C Modulation Ones

< Knter:ered ?ogical Or < Knter:ering Stuc4 at eero

C Beceivers

< Knter:ered Stuc4 at eero < Knter:ering Bf Knter:ered Jit

!1

"Y

!3

"Y "` "[ "Y "` "` Knput Dhrough O;ead =ndP

!1

"[

!3

"Y "[ "[

Asymmetric Errors

< =liminate Knter:ering 0aults < Structures with Same Jit =rrors

C Vaveguides OY ! TP Beceivers OY TP C Beceivers OY ! TP C Modulating Ones OY ! TP

< Asymmetric =rrors Much =asier to ;etectWCorrect

Conclusions

< Drimming is Dric4y Kssue

C Ieating has +on-linear Belationship with Bing Count C Current KnLection May Je Dhermally 7nstable

< Sliding Bing Vindow < Sliding Bing Vindow

C Kncreases DCV C May +ot Je Complete Solution

< Besilience in Mhotonic +etwor4s

Thank You

< guestionsh