A new scheme of implementing all-optical logic systems exploiting material nonlinearity and polarization based encoding technique

Abstract

In this letter, the authors propose a new concept of implementing all-optical logic gates by representing the logic states with polarization of an optical signal .As the state of polarization of the light signal is very much suitable for encoding and detecting the bits of data of a digital signal in communication, the scheme may extend some wide applications in alloptical parallel computation and information processing.

Implementation of an optical S-R flip-flop with polarization encoded light signal

“…Polarization coding technique has an advantage over intensity coding as the polarization state of a light signal is not changed. Since the last few decades lots of contributions using polarization encoding are reported [6][7][8] .…”

“…The current authors have proposed a scheme to implement all-optical logic systems by exploiting material nonlinearity and polarization based encoding technique [6] . Again a method to maintain a fixed intensity level of light signal required for a digital optical processor based on nonlinear material, which depends on the intensity of light signal, has been already proposed [9] .…”

“…The detail description of this type switch is already described in our earlier paper [6] . Some optical isotropic nonlinear material possesses 2 nd order nonlinearity.…”

Experimental study on all-optical half-adder based on semiconductor optical amplifier

“…As a result, the output is the sum of the two input bits and the carry. In the experiment, all-optical half-addition calculation is achieved between two 10 Gb/s signals.The all-optical logic operations of the all-optical signal processing become one of the key technologies in all-optical networks [1][2][3] . Semiconductor optical amplifier (SOA) has been widely investigated in the application of all-optical logic.…”

“…The all-optical logic operations of the all-optical signal processing become one of the key technologies in all-optical networks [1][2][3] . Semiconductor optical amplifier (SOA) has been widely investigated in the application of all-optical logic.…”