All-Optical Logic Gates: Designs, Classification, and Comparison

Table 2

Comparison between SOA based gates.

Reported; gates; category	Reported; gates	Extinction ratio (dB)	Operating; speed; (Gb/s)	Modulation; type	Nonlinear; element	Polarization; sensitivity	Integration; capacity
UNI copropagating	XOR/AND/NOR/; OR/NOT/; XNOR/NAND	8/10/11	5/10/20/40	XGM, FWM	SOA	More	Compact
UNI counterpropagating	AND/NOR/OR/X; NOR	6.5	10	XGM, FWM	SOA	More	Compact
Sagnac; interferometer	XOR/NOT/AND/; OR	21.12/14.7/22	10/40/100	XGM	SOA	No	Moderate
Michelson; Interferometer	XOR	11	10	XGM	SOA	No	Compact
MZI; configuration	XOR/XNOR/AND; /NAND/OR/; NOR	15/18/30	10/20/40/80	XGM, XPM	SOA	No	Compact
MZI; Push-pull; Configration	XOR/OR	7.8/11/12	10/20/40	XGM, XPM	SOA	No	Moderate
MZI counter Propagating	XOR/NOR/; XNOR	8/9.22/30	10/40	XGM, XPM	SOA	No	Compact
DI; configuration	OR/NOR/; XOR	13.9	40	XGM, XPM	SOA	No	Moderate