All-optical half-adder by using a single-stage optical parametric amplifier

Abstract

An all-optical half-adder has been successfully demonstrated using cross gain modulation (XGM) and four-wave mixing (FWM) in an optical parametric amplifier (OPA) on a highly-nonlinear dispersion-shifted fiber. Power penalty of less than 2dB was achieved.

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

“…6 that Q-factors P 7.9 & ERs P 6.9 dB have been recorded for each output of proposed module at 100 Gbps bit rate, which are a significant improvements of over results reported by Lai et al [10], [23], in terms of operating bit rate and length of HNLF used which is only 8 meter in proposed adder and subtraction unit design. Further, a comparative analysis of proposed simultaneous half-addition and half-subtraction technique with current state-of-the-art all-optical computing schemes is presented in Table 4.…”

“…XGM occurs, when OPA gain spectrum gets modulated due to injection of IM pump signals. In present scheme, input data signals (A & B) serve as IM pump signals which modulate the OPA gain spectrum [10,[23][24][25][26][27][28][29]. Additionally, if the phase matching conditions are met, degenerated FWM idlers will be generated resulting in further annihilation of injected signals A & B.…”

“…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].…”

“…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.…”