CN103529569B - Based on the all-optical logic device of asymmetric coupler Cross-phase Modulation - Google Patents
Based on the all-optical logic device of asymmetric coupler Cross-phase Modulation Download PDFInfo
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- CN103529569B CN103529569B CN201310477795.0A CN201310477795A CN103529569B CN 103529569 B CN103529569 B CN 103529569B CN 201310477795 A CN201310477795 A CN 201310477795A CN 103529569 B CN103529569 B CN 103529569B
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Abstract
The invention discloses based on asymmetric coupler Cross-phase Modulation all-optical logic device, comprise pumping source, Erbium-Doped Fiber Amplifier (EDFA), bandpass filter, three Polarization Controllers, three optoisolators, wave multiplexer, signal source, fiber coupler.Pump light is connected with the first port of wave multiplexer by Erbium-Doped Fiber Amplifier (EDFA), bandpass filter, the first polarizer, the first optoisolator successively; Flashlight is connected with the second port of wave multiplexer by the second polarizer, the second optoisolator successively; The public port of wave multiplexer is connected with the first port of fiber coupler, and the second bundle flashlight is connected with the second port of fiber coupler by the 3rd polarizer, the 3rd optoisolator; Two output ports of fiber coupler are connected with photoelectric commutator respectively.All-optical logic device of the present invention utilizes Cross-phase Modulation, produces optical kerr effect, has highly sensitive, and switching speed is fast etc. advantage.
Description
Technical field
The invention belongs to optical information technology field, be specifically related to a kind of all-optical logic device based on asymmetric coupler Cross-phase Modulation.
Background technology
The foundation stone of all-optical switch logic device as all-optical network, the important devices of composition All-optical switching core cell, cause the extensive concern of researcher.In the evolution of following optical communication technique, be unable to do without the development of optical switching technique.Light logic device is that one has multiple alternative input, output port, the light signal of arbitrary input port can be transformed into the light-path switching device of any output port, the effect of light logic device can realize the different light-path of light signal transmission line or integrated optical circuit etc. in optical-fiber network is switched or logical operation fast.All-optical logic device based on asymmetric coupler Cross-phase Modulation not only achieves different logic photoswitches in theory, but also has the advantages such as switching response speed is fast.
Summary of the invention
For the shortcoming of other all-optical switch logic device, the invention provides a kind of all-optical logic device based on asymmetric coupler Cross-phase Modulation, have highly sensitive, the advantages such as switching response speed is fast, are particularly suitable for the application in System of all Optical Communication technology.The present invention takes following technical scheme: based on the all-optical logic device of asymmetric coupler Cross-phase Modulation, comprise pumping source, Erbium-Doped Fiber Amplifier (EDFA), bandpass filter, the first Polarization Controller, the second Polarization Controller and the 3rd Polarization Controller, the first optoisolator, the second optoisolator and the 3rd optoisolator, wave multiplexer, fiber coupler, the first photoelectric commutator and the second photoelectric commutator, the first signal source and secondary signal source.Pumping source is connected with the first port of Erbium-Doped Fiber Amplifier (EDFA), second port of Erbium-Doped Fiber Amplifier (EDFA) is connected with the first port of bandpass filter, second port of bandpass filter is connected with the first port of the first polarizer, and the second port of the first polarizer is connected with the first port of the first isolator.Signal source is connected with the first port of the second polarizer, second port of the second polarizer is connected with the first port of the second isolator, second port of the first isolator is connected with the first port of wave multiplexer, and the second port of the second isolator is connected with the second port of wave multiplexer.Signal source is connected with the first port of the 3rd polarizer, second port of the 3rd polarizer is connected with the first port of the 3rd isolator, 3rd port of wave multiplexer is connected with the first port of fiber coupler, second port of the 3rd isolator is connected with the second port of fiber coupler, 3rd port of fiber coupler is connected with the first photoelectric commutator, and the 4th port of fiber coupler is connected with the second photoelectric commutator.
Preferably, the first port of wave multiplexer is 50% port, and the second port is 50% port.
Preferably, the cross-coupling coefficient of this fiber coupler (7-1) is 0.5.
Preferably, the signal wavelength range that signal source produces is 1500nm-1550nm, and power is 10mW.
Preferably, the pumping wave wavelength coverage that pumping source produces is 800-900nm, and power bracket is 0 ~ 4kW.
Feature of the present invention is the first input end mouth at fiber coupler, adds the adjustable heavy pumping light of a beam intensity, utilize optical kerr effect by wave multiplexer, produces Cross-phase Modulation, thus realizes the logic device translation function of flashlight.
The present invention utilizes Erbium-Doped Fiber Amplifier (EDFA) to be amplified by input pumping light, enter fiber coupler through wave multiplexer together with flashlight, due to the effect of Cross-phase Modulation, cause the phase place of the light transmitted in coupling mechanism to change, thus change the path exporting light, realize logic device translation function.
All-optical logic utensil of the present invention has highly sensitive, and the advantages such as switching response speed is fast, are particularly suitable for the application in System of all Optical Communication technology.
Accompanying drawing explanation
Fig. 1 is the structural representation based on asymmetric coupler Cross-phase Modulation all-optical logic device.
Fig. 2 is the logic device family curve that Output optical power changes with pumping light power.
E in Fig. 2
1represent the output power of fiber coupler the 3rd port (h3), E
2represent the output power of fiber coupler the 4th port (h4).
Embodiment
As shown in Figure 1, the present embodiment comprises pumping source 1-1 based on the all-optical logic device of asymmetric coupler Cross-phase Modulation, Erbium-Doped Fiber Amplifier (EDFA) 2-1, bandpass filter 3-1, the first Polarization Controller 4-1, the second Polarization Controller 4-2 and the 3rd Polarization Controller 4-3, the first optoisolator 5-1, the second optoisolator 5-2 and the 3rd optoisolator 5-3, wave multiplexer 6-1, fiber coupler 7-1, the first photoelectric commutator 8-1 and the second photoelectric commutator 8-2, the first signal source 9 and secondary signal source 10.The pumping wave wavelength coverage that pumping source 1-1 produces is 1530nm-1570nm, and power bracket is 0 ~ 4kW.The signal wavelength range that signal source 9,10 produces is 1500nm-1550nm, and power is 10mW.
Pumping source is connected with the first port b1 of Erbium-Doped Fiber Amplifier (EDFA), second port b2 of Erbium-Doped Fiber Amplifier (EDFA) is connected with the first port c1 of bandpass filter, second port c2 of bandpass filter is connected with the first port d1 of the first polarizer, and the second port d2 of the first polarizer is connected with the first port f1 of the first isolator.Signal source 9 is connected with the first port d3 of the second polarizer, second port d4 of the second polarizer is connected with the first port f3 of the second isolator, second port f2 of the first isolator is connected with the first port i1 of wave multiplexer, and the second port f4 of the second isolator is connected with the second port i2 of wave multiplexer.Signal source 10 is connected with the first port e1 of the 3rd polarizer, second port e2 of the 3rd polarizer is connected with the first port g1 of the 3rd isolator, 3rd port i3 of wave multiplexer is connected with the first port h1 of fiber coupler, second port g2 of the 3rd isolator is connected with the second port h2 of fiber coupler, 3rd port h3 of fiber coupler is connected with the first photoelectric commutator, and the 4th port i4 of fiber coupler is connected with the second photoelectric commutator.
The output power of adjustable pump light, calculates the different output power of fiber coupler output port, according to extinction ratio decision logic device logic function.
Fig. 2 shows: in given power input situation, the logic device family curve that the output power of two output ports changes with pumping light power.Cusp means the path change of output optical signal, and pump power is now called threshold power.
Table 1 represents selection pump power, combines the truth table of the all-optical logic device drawn according to different inputs.H1, h2 and h3 in table, h4 represents the input/output port of fiber coupler respectively, and logical value " 0 " and " 1 " indicate that no signal inputs.X
ijbe extinction ratio, be used for judging output logic value.
Table 1
The implementation procedure of all-optical logic device of the present invention:
1., according to switching characteristic curve, find out the threshold power of fiber coupler.
2. according to the threshold power of coupling mechanism, select different pump powers, simultaneously in conjunction with different inputs combination, realize different photoswitch logic gates.
Above the preferred embodiments of the present invention and principle are described in detail, for those of ordinary skill in the art, according to thought provided by the invention, embodiment will change, and these changes also should be considered as protection scope of the present invention.
Claims (3)
1. based on the all-optical logic device of asymmetric coupler Cross-phase Modulation, it is characterized in that: comprise pumping source (1-1), Erbium-Doped Fiber Amplifier (EDFA) (2-1), bandpass filter (3-1), first Polarization Controller (4-1), second Polarization Controller (4-2) and the 3rd Polarization Controller (4-3), first optoisolator (5-1), second optoisolator (5-2) and the 3rd optoisolator (5-3), wave multiplexer (6-1), fiber coupler (7-1), first photoelectric commutator (8-1) and the second photoelectric commutator (8-2), first signal source (9) and secondary signal source (10),
Pumping source is connected with first port (b1) of Erbium-Doped Fiber Amplifier (EDFA), second port (b2) of Erbium-Doped Fiber Amplifier (EDFA) is connected with first port (c1) of bandpass filter, second port (c2) of bandpass filter is connected with first port (d1) of the first Polarization Controller, and second port (d2) of the first Polarization Controller is connected with first port (f1) of the first optoisolator, first signal source (9) is connected with first port (d3) of the second Polarization Controller, second port (d4) of the second Polarization Controller is connected with first port (f3) of the second optoisolator, second port (f2) of the first optoisolator is connected with first port (i1) of wave multiplexer, and second port (f4) of the second optoisolator is connected with second port (i2) of wave multiplexer, secondary signal source (10) is connected with first port (e1) of the 3rd Polarization Controller, second port (e2) of the 3rd Polarization Controller is connected with first port (g1) of the 3rd optoisolator, 3rd port (i3) of wave multiplexer is connected with first port (h1) of fiber coupler, second port (g2) of the 3rd optoisolator is connected with second port (h2) of fiber coupler, 3rd port (h3) of fiber coupler is connected with the first photoelectric commutator, 4th port (i4) of fiber coupler is connected with the second photoelectric commutator,
The cross-coupling coefficient of described fiber coupler (7-1) is 0.5;
First port (i1) of described wave multiplexer (6-1) is 50% port, and the second port (i2) is 50% port.
2. as claimed in claim 1 based on the all-optical logic device of asymmetric coupler Cross-phase Modulation, it is characterized in that: the signal wavelength range that the first signal source (9) and secondary signal source (10) produce is 1500nm ~ 1550nm, and power is 10mW.
3., as claimed in claim 1 based on the all-optical logic device of asymmetric coupler Cross-phase Modulation, it is characterized in that: the pumping wave wavelength coverage that pumping source (1-1) produces is 800-900nm, power bracket is 0 ~ 4kW.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103969912B (en) * | 2014-05-05 | 2016-09-14 | 杭州电子科技大学 | Sagnac ring all-optical logic device based on Electro-optical Modulation |
| CN103969913A (en) * | 2014-05-05 | 2014-08-06 | 杭州电子科技大学 | Erbium-doped optical fiber coupler cross phase modulation all-optical logic device |
| CN104102066B (en) * | 2014-06-26 | 2017-01-04 | 杭州电子科技大学 | All-optical logic device based on fiber coupler double pumping action optical modulations |
| CN104280975B (en) * | 2014-10-20 | 2017-01-18 | 电子科技大学 | All-optical XOR gate device based on cascaded semiconductor optical amplifier |
| CN105629624A (en) * | 2016-01-19 | 2016-06-01 | 杭州电子科技大学 | All-optical logic gate based on FBG (Fiber Brag Grating) CPM (Cross Phase Modulation) |
| CN106772819B (en) * | 2016-12-01 | 2019-04-30 | 南京邮电大学 | 2 × 2 interference-type all-optical switch of chalcogenide glass photonic crystal fiber and control method |
| CN110320726B (en) * | 2019-07-04 | 2022-05-27 | 杭州电子科技大学 | All-optical logic gate of active nonlinear three-core optical fiber coupler |
| CN118138036B (en) * | 2024-05-07 | 2024-07-09 | 苏州大学 | Combined photoelectric logic gate |
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| CN203519949U (en) * | 2013-10-14 | 2014-04-02 | 杭州电子科技大学 | All-optical logic device based on cross phase modulation of asymmetric coupler |
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