Performance improvement in mesh-based optical networks-on-chip
In the optical communication system, crosstalk noise is always the critical factor affecting the optical signal transmission, especially in networks-on-chip (ONoCs). Based on the model at device, router and network level, this paper proposes the Optimized Crux (OC) router which uses the crossing angle of 60° or 120° instead of the conventional 90° to optimize the Crux optical router. The SNR of the Optimized Crux (OC) router is improved by 2.1dB compared with the Crux on the premise that the size of mesh-based ONoCs is 7×7. By comparing analysis, the results show that to achieve the bit error rate (BER) of 10-9 for reliable transmissions, the maximum mesh-based ONoCs size has expanded from 4×4 when using the Crossbar optical router to 8×8 when using the OC router.