All-Optical Full-Adder Based on Cascaded PPLN Waveguides

A single As2Se3 chalcogenide Highly Non-Linear Fiber (HNLF) based simultaneous all-optical half-adder and half-subtracter

“…Several researchers have demonstrated a number of designs to realize all-optical computing devices such as half-subtracter, half-adder, full-adder, carry look ahead adder etc. using a variety of 2nd (v (2) ) & 3rd (v (3) ) order non-linear effects and Interferometric architectures [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

“…Wang et al [6] implemented an all-optical half-adder and half-subtracter using cascaded SFG and DFG (cSFG/DFG) in a single PPLN waveguide at 40 Gbps. Whereas, Shen et al [12] proposed a cSFG/DFG based all-optical full-adder using a structure comprising of 5 cascaded PPLN waveguides. It has been observed that maximum operating bit rate of cSFG/DFG based all-optical devices was limited due to slow carrier dynamics of PPLN waveguides used.…”

“…Unfortunately, majority of all-optical arithmetic and computing units reported over the years in the literature [4][5][6][7][8][9][10][11][12][13][14][15][16] which are based on exploitation of non-linear effects (XGM, XPM, FWM & cSFG/DFG) in SOAs, PPLNs suffer from limitations such as limited bit rate of operation, cost of implementations and lack of simplicity etc. The prominent reason behind lower bit rate operation of earlier reported all-optical computing devices [4][5][6][7][8][9][10][11][12][13][14][15][16] was slower carrier dynamics of non-linear mediums used (SOAs and PPLNs).…”

“…The prominent reason behind lower bit rate operation of earlier reported all-optical computing devices [4][5][6][7][8][9][10][11][12][13][14][15][16] was slower carrier dynamics of non-linear mediums used (SOAs and PPLNs). So, in order to overcome this problem, As 2 Se 3 chalcogenide Highly Non-Linear Fiber (HNLF) has been utilized as a non-linear medium, as it has capability to exhibit ultrafast carrier dynamics as compared to SOAs & PPLNs.…”

“…The proposed half-addition and half-subtraction approach outperforms 2nd order (v (2) ) & 3rd order (v (3) ) non-linear effects (cSFG/DFG) in PPLNs [6,12], (XGM & FWM) in SOAs [7,9,16] and (XPM) in MZIs [13,17] based all-optical computing schemes in terms of operating bit rates and number of non-linear elements used, as only single fiber is used. Further, proposed scheme is better as compared to approach introduced by Gui and Wang [19], as proposed scheme utilizes As 2 Se 3 chalcogenide HNLF, which is easier to manufacture and is readily available commercially as compared to Si-nc & PTS slot waveguide used for designing purposes by Gui and Wang [19].…”