在未来的通信领域中,全光逻辑门是全光计算机和全光网络的基本单元。目前已经提出了很多实现全光逻辑门的结构和方法,但是全光逻辑的技术瓶颈也出现了,就是怎样能够将单个的全光逻辑门级联起来实现更复杂的逻辑关系。现存的全光逻辑门结构一般不具有很好的可以实现多级连接的级联性,而且现有的对于级联性的分析大都停留在理论层面,而没有与实际情况相结合,所以对于实际应用来说意义很小。提出了一种新型的基于高非线性Sagnac干涉仪的超高速全光NOT门,建立了它的数学模型,采用了与实际情况更加接近的高斯脉冲模拟输入光,并且在仿真结果的基础上分析了系统的级联性,对级联性的分析考虑了光纤损耗和走离效应的影响。得到的基本结论表明,所提出的全光逻辑门的结构能够在实际情况下保持良好的级联性。 In the future of communications, all-optical logic gates are the basic unit of all-optical computers and all-optical networks. At present, many structures and methods for realizing all-optical logic gates have been proposed. However, the technical bottleneck of all-optical logic has also emerged. That is, how can all single optical logic gates be cascaded to achieve more complex logical relationships. The existing all-optical logic gate structure generally does not have a good cascade connection that can achieve multi-level connections, and the existing analysis of cascades mostly stays at the theoretical level, but not combined with the actual situation, so for the actual Application is of little significance. A new type of ultra-fast all-optical NOT gate based on high nonlinear Sagnac interferometer is proposed. Its mathematical model is established, and a Gaussian pulse analog input light closer to the actual situation is adopted. Based on the simulation results, The system’s cascade, the analysis of cascading takes into account the effects of fiber loss and away from the effect. The basic conclusions obtained show that the proposed structure of all-optical logic gates can maintain a good cascade in practice.