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 p Christopher +itta- Matthew 0arrens- and 3en4atesh A4ella 7niversity o: Cali:ornia- ;avis

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 < Conclusions C

Methodology < ;eveloped Simulator OMinta4aP Mintaka (Floor Plan, Power) < 7sed Iot-Spot RST to ;etermine Demperature Floor Plan Temperature Power C UT VWm ° K Conductance Y C YSZ[eZ \Wm [ ° K Spec Ieat Y C Steady State Solver Hot-Spot 5.0 < Closed ?oop to Solve :or Drimming Mower < 3aried Ambient Demperature [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 Demperature :or MMMA t : MMMA

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

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 C Beduce Current Once 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 C Beduce Current Once 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 C Beduce Current Once 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 < Conclusions C

Resilient Photonic Networks < Dradeo:: Surplus Jandwidth :or Besilience < Communication Mower Mostly Mrepaid C =>ternal ?aser Static Overhead C Drimming Static Overhead 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

Bit Errors " Y " ` " [ " ` " [ " ` < +on-Knter:ering 0aults Knput Dhrough O0eedP ODo ;estP X ! 1 ! 3 C Modulation eeros ;rop < Stuc4 at One 0aults " Y " [ " [ " [ < T ! Y Jit =rrors " Y " Y " Y " [ C Modulation Ones Modulation Ones ;rop ;rop ODo ;estP X ! 1 ! 3 < Stuc4 at eero 0aults Knput Dhrough < Y ! T Jit =rrors " ` " Y " ` " Y " ` " [ O0eedP O;ead =ndP C Beceivers " Y " [ < Stuc4 at eero 0aults X < Y ! T Jit =rrors ! 1 ! 3 Knput Dhrough " Y " ` " [ " ` " [ " ` O;ead =ndP

Bit Errors " Y " ` " [ " ` " [ " ` < Knter:ering 0aults Knput Dhrough O0eedP ODo ;estP " Y ! 1 ! 3 C Modulation eeros ;rop < Knter:ered ?ogical And " Y " [ " Y " [ " [ " [ < Knter:ering Stuc4 at One " Y " Y " [ " Y " [ C Modulation Ones Modulation Ones ;rop ;rop ODo ;estP " Y ! 1 ! 3 < Knter:ered ?ogical Or Knput Dhrough < Knter:ering Stuc4 at eero " ` " Y " ` " Y " ` " [ O0eedP O;ead =ndP C Beceivers " Y " [ < Knter:ered Stuc4 at eero " [ < Knter:ering Bf Knter:ered Jit ! 1 ! 3 Knput Dhrough " Y " [ " [ O;ead =ndP

Asymmetric Errors < =liminate Knter:ering 0aults < Structures with Same Jit =rrors C Vaveguides OY ! TP C Beceivers OY ! TP 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