25 July 2016 Simultaneous all-optical half-adder, half-subtracter, comparator, and decoder based on nonlinear effects harnessing in highly nonlinear fibers
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Abstract
A multifunctional combinational logic module capable of performing several signal manipulation tasks all-optically, such as half-addition/subtraction, single-bit comparison, and 2-to-4 decoding simultaneously is proposed. Several logic functions (A+B¯, A.B, A¯.B, A.B¯, AB, and AB) between two input signals A and B are implemented by harnessing a number of nonlinear effects, such as cross-phase modulation (XPM), cross-gain modulation (XGM), and four-wave mixing (FWM) inside only two highly nonlinear fibers (HNLF) arranged in a parallel structure. The NOR gate (A+B¯) is realized by the means of XPM effect in the first HNLF, whereas, A‾.B, A.B¯, and A.B logics have relied on utilization of XGM and FWM processes, respectively, in parametric medium made up of the second HNLF of parallel arrangement. The remaining AB and AB logics required for successful implementation of the proposed simultaneous scheme are attained by temporally combining previously achieved (A‾.B and A.B‾) and (A.B and A+B‾) logics. Quality-factor ≥7.4 and extinction ratio ≥12.30  dB have been achieved at repetition rates of 100 Gbps for all logic functions (A+B¯, A.B, A¯.B, A.B¯, AB, and AB), suggesting successful simultaneous implementation.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Karamdeep Singh, Gurmeet Kaur, Maninder Lal Singh, "Simultaneous all-optical half-adder, half-subtracter, comparator, and decoder based on nonlinear effects harnessing in highly nonlinear fibers," Optical Engineering 55(7), 077104 (25 July 2016). https://doi.org/10.1117/1.OE.55.7.077104 . Submission:
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