Performance constraints for onchip optical interconnects

This work aims at defining the marks that optoelectronic solutions will have to beat for replacing electric interconnects at chip level. We first simulate the electric response of future electrical interconnects considering the reduction of the CMOS feature size /spl lambda/ from 0.7 to 0.05 /spl mu/m. We also consider the architectural evolution of chips to analyze the latency issues. We conclude that: 1) it does not seem necessary in the future chips to consider the integration of optical interconnects (OIs) over distances shorter than 1000-2000 /spl lambda/, because the performance of electric interconnects is sufficient; 2) the penetration of OIs over distances longer than 10/sup 4//spl lambda/ could be envisaged (on the sole basis of the performance limitation) provided that it will be possible to demonstrate new generations of (cheap and CMOS-compatible) low-threshold high-efficiency vertical cavity surface emitting lasers (VCSELs) and ultrafast high-efficiency photodiodes; 3) the first possible application of onchip OIs is likely not for interblock communication but for clock distribution as the energy constraints (imposed by the evolution of CMOS technology) are weaker and because the clock tree is an extremely long interconnect.

[1]  Larry A. Coldren,et al.  AlInGaAs/AlGaAs strained-layer 850 nm vertical-cavity lasers with very low thresholds , 1997 .

[2]  James D. Meindl,et al.  Low power microelectronics: retrospect and prospect , 1995, Proc. IEEE.

[3]  Shubhendu S. Mukherjee,et al.  The Alpha 21364 Network Architecture , 2002, IEEE Micro.

[4]  A.F.J. Levi,et al.  Optical interconnects in systems , 2000, Proceedings of the IEEE.

[5]  K.C. Saraswat,et al.  Effect of scaling of interconnections on the time delay of VLSI circuits , 1982, IEEE Transactions on Electron Devices.

[6]  Balaram Sinharoy,et al.  POWER4 system microarchitecture , 2002, IBM J. Res. Dev..

[7]  F.J. Leonberger,et al.  Optical interconnections for VLSI systems , 1984, Proceedings of the IEEE.

[8]  Takayasu Sakurai,et al.  Closed-form expressions for interconnection delay, coupling, and crosstalk in VLSIs , 1993 .

[9]  J.C. Campbell,et al.  A silicon NMOS monolithically integrated optical receiver , 1997, IEEE Photonics Technology Letters.

[10]  Luiz André Barroso,et al.  Piranha: a scalable architecture based on single-chip multiprocessing , 2000, Proceedings of 27th International Symposium on Computer Architecture (IEEE Cat. No.RS00201).

[11]  Ravi Nair,et al.  Effect of increasing chip density on the evolution of computer architectures , 2002, IBM J. Res. Dev..

[12]  J.D. Meindl,et al.  Optimal interconnection circuits for VLSI , 1985, IEEE Transactions on Electron Devices.

[13]  David A. B. Miller,et al.  Limit to the Bit-Rate Capacity of Electrical Interconnects from the Aspect Ratio of the System Architecture , 1997, J. Parallel Distributed Comput..

[14]  M. Ingels,et al.  A 1-Gb/s, 0.7-μm CM+ OS optical receiver with full rail-to-rail output swing , 1999, IEEE J. Solid State Circuits.

[15]  T. J. Drabik Balancing electrical and optical interconnection resources at low levels , 1999 .

[16]  David A. B. Miller Dense two-dimensional integration of optoelectronics and electronics for interconnections , 1998, Photonics West.

[17]  Oh-Kyong Kwon,et al.  A new on-chip interconnect crosstalk model and experimental verification for CMOS VLSI circuit design , 2000 .

[18]  Marc Belleville,et al.  Inductance and capacitance analytic formulas for VLSI interconnects , 1996 .

[19]  Kenichi Iga,et al.  Record low-threshold index-guided InGaAs/GaAlAs vertical-cavity surface-emitting laser with a native oxide confinement structure , 1995 .

[20]  Horst Zimmermann,et al.  Monolithic CMOS photoreceivers for short-range optical data communications , 1999 .

[21]  D.A.B. Miller,et al.  Rationale and challenges for optical interconnects to electronic chips , 2000, Proceedings of the IEEE.

[22]  T. Heide,et al.  Monolithic high-speed CMOS-photoreceiver , 1999, IEEE Photonics Technology Letters.

[23]  Chi Fan,et al.  Power minimization and technology comparisons for digital free-space optoelectronic interconnections , 1999 .

[24]  J. Petrovick,et al.  The circuit and physical design of the POWER4 microprocessor , 2002, IBM J. Res. Dev..

[25]  Mark Ingels,et al.  A 1-Gb/s, 0.7-/spl mu/m CMOS optical receiver with full rail-to-rail output swing , 1999 .

[26]  Atsushi Iwata,et al.  Optical Interconnections as a New LSI Technology (Special Issue on Opto-Electronics and LSI) , 1993 .

[27]  Stephen B. Alexander,et al.  Optical Communication Receiver Design , 1997 .

[28]  S C Esener,et al.  Speed and energy analysis of digital interconnections: comparison of on-chip, off-chip, and free-space technologies. , 1998, Applied optics.

[29]  W. R. Eisenstadt,et al.  High-speed VLSI interconnect modeling based on S-parameter measurements , 1993 .

[30]  Shubhendu S. Mukherjee,et al.  The Alpha 21 364 Network Architecture , 2001 .

[31]  Mark Ingels,et al.  A CMOS 18 THz/spl Omega/ 248 Mb/s transimpedance amplifier and 155 Mb/s LED-driver for low cost optical fiber links , 1994 .

[32]  Ashok V. Krishnamoorthy,et al.  1 Gbit/s CMOS photoreceiver with integrated detector operating at 850 nm , 1998 .