For solving "bottlenects effects" in a computer and improving its calculation rates

optical interconnections within a computer are now well investigated in the world. And as one of the basis of optical digital computer

all-optical interconnections are also extensively studied in recent years. All-optical interconnections within digital optical computing systems requir that light beam carrying information be deflected to another position reqired from one position to realize real-time

optical addressing. In this paper we proposed a new method for solving such a problem

namely stratified grating composed of nonlinear media characterized by light intensity-dependent refractive indices was used as a basic optical interconnection device

so Bragg reflecting condition of incident signal light in the grating is changed by means of refractive index change of the nonlinear media caused by the change of external controlling light intensity

then the signal beam is deflected to a position reqired. The optical limiting effect realized in ZnS/ZnSe stratified grating is reported in this paper for the first time

and the nonlinear threshold is about 140mW

the limiting threshold is 24mW. It shows that the dominant mechanisms of the optical limiting in the experiment is the large photogenerated free-carrier defocusing contribution to the linear refractive index of the material from the two-photon absorption (2PA). The optical limiter fabricated by multiple layers structure of semiconductor materials has not only lower threshold and wider frequency response

but also the characteristics of which the threshold of the limiter is dependent on all kinds of parameters of the device. So its adaptability is superior to single layer structure limiter's.