Full-optical logic gate

Abstract

The invention relates to a full-optical logic gate (10), which can be reused to achieve opposite phase operations of an AND gate, an OR gate, an NOT gate, an NAND gate, an NOR gate, an XOR gate, an XNOR gate and combination thereof, and can also achieve a half adder. The full-optical logic gate comprises light input ports (2, 3) for receiving two control light signals respectively, a light input port (1) for receiving a synchronous light clock signal, a light output port (8) for outputting the result for expressing logic application, and a light output port (9) for outputting opposite phase operation. The full-optical logic gate is characterized by comprising a light combination device (4) and a nonlinear optical device (7), wherein the light combination device (4) is used for combining the two control light signals to generate corresponding combined signals with a wavelength division multiplexer or a polarization beam combiner; and the nonlinear optical device (7) is used for receiving the combined signals and the synchronous light clock signal and emitting two paths of light output signals mutual in opposite phase operations. The full-optical logic function depends on the characteristic of the nonlinear optical device, wherein the characteristic is selected so that the power of the output signals and the light power of the clock signal are redistributed and associated through the selected logic function.

Description

technical field [0001] All-optical logic gates can be reused to realize AND gates, OR gates, NOT gates, NAND gates, NOR gates, XOR gates, NOR gates and their inversion operations. Half adders can also be realized, which belongs to optoelectronic technology field. Background technique [0002] The ability to perform superdeterministic logic operations on optical signals without converting them back to electrical signals has long been desired in the field of optoelectronics. [0003] For example, in order to perform high-speed routing functions in broadband packet-switching networks, the headers of optical data packets require more complex optical signal processing such as synchronization, frame identification, and address identification, and all-optical logic gates are the key components. The all-optical AND gate (AND) can be used to identify the frame header in the optical switch node; the all-optical exclusive-or gate (XOR) can be used to identify, modify, and replace the ...

AI Technical Summary

Problems solved by technology

[0005] Several examples of all-optical logic gates using nonlinear effects are introduced in the above literature: the response time of semiconductors limits the maximum signal bit rate; the response time of microring resonators is difficult to determine due to the interference of multiple beams before and after; based on waveguide The logic gate of the device is still in the initial stage of development and needs further research from the perspective of technology and operation before it is commercialized

[0006] The nonlinear response of silica fiber is almost instantaneous (less than 10fs). It is commonly reported that using nonlinear fiber elements to design all-optical logic operations, for example, R.Lebref, B.Landousies, T.Georges, J.Lightwave Tech.15, 766 (1997); V.Petrov, W.Rudolph, Opt.Commun.76, 53(1990); Chinese invention patent application number "200580020660.5" has realized all all-optical logic gates with two structures, and one of them is realizing When the OR gate is used, when the two control signals composed of pseudo-random sequences have the same "1" bit, the power is halved, which is difficult to control in high-speed optical signal processing

Images