O-Router: an optical routing framework for low power on-chip silicon nano-photonic integration

Authors:
Duo Ding;Yilin Zhang;Haiyu Huang;Ray T. Chen;David Z. Pan
Affiliations:
Univ. of Texas at Austin, Austin, TX;Univ. of Texas at Austin, Austin, TX;Univ. of Texas at Austin, Austin, TX;Univ. of Texas at Austin, Austin, TX;Univ. of Texas at Austin, Austin, TX
Venue:
Proceedings of the 46th Annual Design Automation Conference
Year:
2009

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Abstract

In this work, we present a new optical routing framework, O-Router for future low-power on-chip optical interconnect integration utilizing silicon compatible nano-photonic devices. We formulate the optical layer routing problem as the minimization of total on-chip optical modulator cost (laser power consumption) with Integer Linear Programming technique under various detection constraints. Key techniques for variable number reduction and routing speedup are also explored and utilized. O-Router is tested on optical netlist benchmarks modified from top global nets of ISPD98/08 routing benchmarks. O-Router experimental results are compared with conventional minimum spanning tree algorithm, demonstrating an average of over 50% improvement in terms of total on-chip optical layer power reduction.