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Simulation and performance analysis of VCSEL based optical interconnect for reconfigurable optical network on chip

Sumita Mishra , Naresh k. Chaudhary Kalyan Singh

The volume of data being transferred between on-chip functional blocks is rising fast due to the need for higher resolution, greater CPU power. Moreover distributed multi-processor architectures require organised high-speed communication between processors. Metallic interconnect is highly inefficient in this role due to unachievable tradeoffs between design parameters and its performance deteriorates rapidly at frequency above 10 GHz due to skin effect and dielectric limitations. Optical interconnects are seen as a viable alternative to electrical interconnects The objective of the work is to model and then simulate the VCSEL based optical interconnect link. The model is based on multimode rate equations and it also accounts for the thermal dependence of a VCSEL’s behaviour. The power output of the simulated link is then optimized with respect to parameters namely optical power and bias current. The methodology presented here is suitable for investigation of both analog and digital modulation schemes but it primarily deals with digital modulation.