光学双稳的可控跃变在全光学信息处理中的应用

Application of the controllable change of optical bistability in processing of all-optical information

光学双稳现象、全光学计算机是目前激光物理学、量子光学和计算机科学等多门学科共同研究的重要内容。在光学腔与三能级原子系统组成的非线性光学系统中,利用改变控制信号脉冲与强相干驱动光的相位失谐量,控制光模系统的双稳迟滞曲线移动,可实现光模系统的2个稳定输出在“高态”与“低态”间的可控跃变。基于这一效应,完成了光学信号的全光存储与光学开关操作。这一结果为全光学信息及量子信息处理和应用提供了一个新的可利用的物理机制。

Optical bistability phenomenon and all-optical computer are the important contents which are studied together presently in laser physics, quantum optics and computer science, etc.. In the nonlinear optical system consisting of optical cavity and three energy level atom system, changing the control signal pulse and phase detunings of strong coherent field is used to control optical bistability hysteresis curve of the system, to realize the controllable change of system output between the ＂high＂ and ＂low＂. Based on the effect, the all-optical information memory and optical switch operation have been completed. This result has provided an effective way for the processing and application of all-optical information and quantum information.