Optoelectronic Fused Computing in Multi-functional Integrated Technology： Development and Challenge

‍ ‍Recently， in the field of military operations， great efforts have been made to realize the joint operation mode， consisting of omni-directional， cross domain coordination and information sharing with the integration of army， navy， air force， satellite and radio interference. In the multi-function integrated technology， many kinds of equipment， including radar， communication， electronic warfare， navigation， friend-or-foe identification and so on， are faced with the problem of sharing radio frequency resources and data processing resources. Massive data processing requires the computing platform with ultra-high computing speed and energy efficiency. However， the traditional electronic computing platform is limited by the “storage wall”， the clock frequency， bandwidth， delay of integrated circuits， and so on， leading to the greatly limitation of computing speed and energy efficiency. The photonic platform has the excellent characteristics of high speed， large bandwidth， low crosstalk， and so on. By constructing an optoelectronic fused computing platform， which combining the photonic platform and the electronic means with the advantages of flexibility and easy regulation， the computing speed and energy efficiency can be effectively improved. In order to better apply the optoelectronic fused computing platform in the multi-function integrated technology， the research status of the optoelectronic fused computing platform are reviewed. The discussion is carried out according to current four typical platform， including on-chip integrated coherent platform， on-chip integrated noncoherent platform， optoelectronic fused computing platform based on optical fiber system， and spatial optical diffraction platform. Otherwise， three important future development trends， including large-scale computing， the realization of nonlinear computing by photonics， and the efficient fusion of optic and electronic based systems， are also described and prospected.