All-optical pole and zero blocks for implementation of optical engineering systems

Basic units for realization of all-pole and zero transfer functions in all-optical engineering systems using the ring resonators are introduced. Using our proposed basic blocks for generation of pole and zero, we can implement any type and any degree of optical engineering systems (e.g. filters and optical processing systems). In this work, z-transform is used as mathematical tools. In this case, the LP Butterworth optical filter design using our proposal is presented as an example.