A new approach of developing all-optical two-bit-binary data multiplier

Alternative Approach of Developing Optical Binary Adder Using Reversible Peres Gates

“…Detailed theory of nonlinear polarization rotation in SOA is demonstrated using the simple rate-equation model [14][15][16][17]. If the optical probe beam in SOA is decomposed into two mutually perpendicular components, called TE mode and TM mode, then these two components experience different optical properties in the presence of the pump beam.…”

All-optical binary logic unit (BLU) using frequency encoded data

“…One of the important techniques of frequency conversion by SOA is the exploitation of non-linear rotation of the state of polarization of the probe beam due to optically induced refractive index change in a bulk SOA in the presence of highly intense pump beams. In this technique interaction of two intense pump beams 'A' and 'B' with the probe beam in the active medium of the SOA induces nonlinear refractive index change which in turn modify the intensity of probe beam as well as its state of polarization (SOP) [7][8][9][10][11][12][13]. Thus the 'TE' and 'TM' modes of the linearly polarized probe beam 'X' of frequency 'm' after passing through the active medium of the SOA suffers phase change, and consequently, the SOP of the output beam with respect to the input probe beam also changes.…”

“…In this article authors use the frequency encoded data, and the basic reason behind this is that as frequency is the fundamental character of an optical signal it does not alter throughout the communication of the signal irrespective of reflection, refraction, attenuation etc. [6][7][8][9][10][11]. The authors have encoded binary state '0' by the optical beam of frequency 'm 1 ', and state '1' by the beam of frequency 'm 2 ' .…”

Implementation of 2-bit multiplier based on electro-optic effect in Mach–Zehnder interferometers

“…An all-optical 2-bit multiplication using Semiconductor optical amplifier (SOA)-assisted Sagnac Switch has been implemented using an optical half adder and optical AND gate (Gayen et al 2010). An exclusive scheme to implement an all-optical AND logic gate and half adder circuit which are the primary building blocks of the multiplier circuit using non-linear shifting operation and frequency conversion properties of semiconductor optical amplifier (SOA) (Mandal et al 2014). The optical logic operation in a sagnac interferometer with electro-optic modulation has been studied (Li et al 2014).…”