All optical logic NAND gate using dark-bright soliton conversion control

In this paper, we present a new concept of all-optical gates using Dark-Bright soliton conversion behaviors within a modified add/drop filter. The soliton can be used to generate logic data "1" and "0" using for optical gates. We have designed a photonic circuit for all-optical logic NAND Gate using dark-bright soliton conversion control within an optical add-drop multiplexer. The input and control logic ̀0', ̀1' are represented by dark (D) and bright (B) soliton pulses, respectively. We found that the simultaneous optical logic NAND Gate at the through port can be performed.