All-optical NOR gates with two and three input logic signals based on cross-polarization modulation in a semiconductor optical amplifier

All-optical AND gate with improved extinction ratio using signal induced nonlinearities in a bulk semiconductor optical amplifier

“…[2][3][4], and has been applied in the design of all-optical logic gate Ref. [5,6]. In this paper, we report an optical AND gate with improved extinction ratio by utilizing XPolM in a bulk SOA in an up and inverted wavelength conversion scheme.…”

<inline-formula><math altimg="none" display="inline" overflow="scroll"><mrow><mn>40</mn><mspace width="0.3em" /><mi>Gbit</mi><mo>∕</mo><mi mathvariant="normal">s</mi></mrow></math></inline-formula> all-optical logic NOR gate based on a semiconductor optical amplifier and a filter

“…5 Several schemes for logic NOR gates based on SOAs have been demonstrated. 4,[6][7][8] Each scheme has its own advantages and disadvantages. For example, NOR gates, 6 which are based on cross-gain modulation in SOAs, have a simple configuration, but the output signals have relatively large chirp and their operation speed is limited by the carrier's recovery time.…”

Passive, “self-trapped family” all-optical half adder using all-optical XOR and AND gates

“…A large number of interesting schemes have been proposed to obtain all-optical logic by active and passive means and various issues have been addressed regarding their performance, a few examples are references [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. However, ultimately all-optical intrinsic, passive, fast, cascadable, polarization independent, workable with incoherent optical inputs and fiber compatible logic gates are desired.…”