Research On All-optical Logic Gate Based On Reverse-Biased PIN Silicon Waveguide

With the rapid development of the Internet,many broadband services came into being,therefore,the developing of ultra-high speed,large capacity communication systems and computer processing systems are urgently needed.However,due to the bottleneck of electronics,all-optical network(AON)and all-optical computing has become one of the key is to achieve ultra-high-speed all-optical signal processing.All-optical logic device is an important component of ultra-fast all-optical signal processing technology,and its maturity directly determines the future development of all-optical network.Therefore,all-optical logic device research has become a hot spot at home and abroad.This paper focuses on all-optical logic devices.Based on the degenerate four-wave mixing(FWM)effect and the non-degenerate FWM effect in the reverse-biased PIN junction silicon waveguide,an On-Off Keying(OOK)signal all-optical logic AND gate and a Differential Phase Shift Keying(DPSK)signal all-optical logic XOR gate scheme are proposed.The theoretical models of all-optical logic AND gate and DPSK signal all-optical logic XOR gate based on reverse-biased PIN junction silicon waveguide are established,and their performance is simulated.The results show that the logical AND gate and logical XOR gate can be implemented by the proposed schemes.The reverse-biased PIN junction is introduced to reduce the free carrier lifetime and improve the output power.The waveguide length has the optimal value,which makes the output power of the all-optical logic gate reach the maximum value.By increasing the signal optical power,reducing the wavelength detuning and effective mode field area,can improve the all-optical logic gate output power.In this paper,the all-optical gate structure based on reverse-biased PIN silicon waveguide is simple,easy to integrate and has high output efficiency.It is a key component in all-optical signal processing technology and is expected to be applied to all-optical network and all-optical calculation.