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All-optical logic gate

An optical logic and laser technology, applied in the field of all-optical logic gates, can solve the problems of low operation rate and effective input bandwidth, and achieve the effect of obvious nonlinear effect, low noise and fast speed.

Inactive Publication Date: 2017-08-18
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of all-optical logic device based on Mach-Zehnder interferometer in order to solve the problem of low operation speed and effective input bandwidth of traditional electric logic devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment discloses an all-optical logic gate, comprising: a first continuous laser 1-1 and a second continuous laser 1-2; a first polarization controller 4-1 and a second polarization controller 4-2 for To control the polarization state of the signal light; the first coupler 5-1 divides the signal light into two paths of light in proportion; Mach-Zehnder interferometer, the first interference arm and the second interference arm of the Mach-Zehnder interferometer Respectively receive the two-way signal light distributed by the first coupler 5-1; the first continuous laser 1-1, the first polarization controller 4-1, port one of the first coupler 5-1, the Mach-Zehnder The first interference arm of the interferometer is connected in sequence; the second continuous laser 1-2, the second polarization controller 4-2, the port two of the first coupler 5-1, and the second interference arm of the Mach-Zehnder interferometer The arms are connected in turn.

[0026] Both th...

Embodiment 2

[0034]Different from Embodiment 1, the all-optical logic gate of this embodiment also includes a first optical filter 2-1 and a second optical filter 2-2 for filtering noise photons, and the first optical filter 2 -1 is set between the first continuous laser 1-1 and the first polarization controller 4-1, and the second optical filter 2-2 is set between the second continuous laser 1-2 and the second polarization controller 4- between 2.

[0035] combine figure 1 As shown in , the a-end and b-end of the first optical filter 2-1 are respectively connected to the output end of the first continuous laser 1-1 and the e-end of the first polarization controller 4-1, and the second optical filter Terminal a1 and terminal b1 of 2-2 are respectively connected to the output terminal of the second continuous laser 1-2 and the terminal e1 of the second polarization controller 4-2.

Embodiment 3

[0037] The difference from Embodiment 2 is that it also includes a first isolator 3-1 and a second isolator 3-2 for isolating optical signals transmitted in the opposite direction. The first isolator 3-1 is arranged on the first optical signal Between the filter 2-1 and the first polarization controller 4-1, the second isolator 3-2 is arranged between the second optical filter 2-2 and the second polarization controller 4-2.

[0038] combined with figure 1 As shown, the c-end and d-end of the first isolator 3-1 are respectively connected to the b-end of the first optical filter 2-1 and the e-end of the first polarization controller 4-1, and the second isolator 3-2 Terminal c1 and terminal d1 of the second optical filter 2-2 are respectively connected to terminal b1 of the second optical filter 2-2 and terminal e1 of the second polarization controller 4-2.

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Abstract

The invention discloses an all-optical logic gate. The all-optical logic gate comprises a first continuous laser, a second continuous laser, a first polarization controller, a second polarization controller, a first coupler and a mach-zehnder interferometer. The first continuous laser, the first polarization controller, a first port of the first coupler and a first interference arm are orderly connected. A second continuous laser, the second polarization controller, a second port of the first coupler and a second interference arm of the mach-zehnder interferometer are orderly connected. The all-optical logic gate has the following beneficial effects: pump light is utilized for carrying out optical-cross phase modulation on weak signals so that phase differences and signal transmissivity of signals of two arms are changed; different logics are obtained by changing extinction ratio of two output ports; and logical operation is achieved.

Description

technical field [0001] The invention belongs to the technical field of optical information, and in particular relates to an all-optical logic gate based on a Mach-Zehnder interferometer. Background technique [0002] All-optical communication refers to the use of light wave technology for signal transmission and exchange between users, that is, the transmission process of data from the source node to the destination node is carried out in the optical domain, and its exchange at each network node uses high-reliability, High-capacity and highly flexible optical cross-connect equipment. In an all-optical network, since there is no need for electrical signal processing, different protocols and codes are allowed, making information transmission transparent. In signal processing, it is often difficult to deal with analog methods, but it is very easy to process digitally, so it is necessary to sample the analog signal, that is, A / D conversion, into a digital signal, and then perfo...

Claims

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Application Information

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IPC IPC(8): G02F3/00
CPCG02F3/00
Inventor 唐向宏李齐良陈德望
Owner HANGZHOU DIANZI UNIV
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