CN103529569A - All-optical logic device based on asymmetric coupler cross phase modulation - Google Patents
All-optical logic device based on asymmetric coupler cross phase modulation Download PDFInfo
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- CN103529569A CN103529569A CN201310477795.0A CN201310477795A CN103529569A CN 103529569 A CN103529569 A CN 103529569A CN 201310477795 A CN201310477795 A CN 201310477795A CN 103529569 A CN103529569 A CN 103529569A
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Abstract
The invention discloses an all-optical logic device based on asymmetric coupler cross phase modulation. The all-optical logic device comprises a pumping source, an erbium-doped optical fiber amplifier, a band-pass filter, three polarization controllers, three optoisolators, a combiner, a signal source and an optical fiber coupler. Pump light passes through the erbium-doped optical fiber amplifier, the band-pass filter, a first polarizer and the first optoisolator in sequence and is connected with the first port of the combiner. Signal light passes through a second polarizer and the second optoisolator in sequence and is connected with the second port of the combiner. The common port of the combiner is connected with the first port of the optical fiber coupler, and a second signal light beam is connected with the second port of the optical fiber coupler through a third polarizer and the third optoisolator. The two output ports of the optical fiber coupler are respectively connected with a photoelectric converter. The cross phase modulation is adopted by the all-optical logic device to generate the optical Kerr effect, and the all-optical logic device has the advantages of being high in sensitivity, high in switching speed and the like.
Description
Technical field
The invention belongs to optical information technical field, be specifically related to a kind of all-optical logic device based on asymmetric coupler Cross-phase Modulation.
Background technology
All-optical switch logic device as the foundation stone of all-optical network, form the important devices of full light exchcange core unit, caused 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 a kind of have a plurality of alternative inputs, output port, the light signal of input port arbitrarily can be transformed into the light-path switching device of any output port, the effect of light logic device is can realize on the light-path that light signal transmission line or integrated optical circuit etc. in optical-fiber network are different switching fast or logical operation.All-optical logic device based on asymmetric coupler Cross-phase Modulation has not only been realized 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 sensitively, the advantage such as switching response speed is fast, is particularly suitable for the application in System of all Optical Communication technology.The present invention takes following technical scheme: the all-optical logic device based on 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, first signal source and secondary signal source.Pumping source is connected with the first port of Erbium-Doped Fiber Amplifier (EDFA), the second port of Erbium-Doped Fiber Amplifier (EDFA) is connected with the first port of bandpass filter, the 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, the second port of the second polarizer is connected with the first port of the second isolator, the 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, the second port of the 3rd polarizer is connected with the first port of the 3rd isolator, the 3rd port of wave multiplexer is connected with the first port of fiber coupler, the second port of the 3rd isolator is connected with the second port of fiber coupler, the 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, by wave multiplexer, adds the adjustable heavy pumping light of a beam intensity, utilizes optical kerr effect, produces Cross-phase Modulation, thereby realizes the logic device translation function of flashlight.
The present invention utilizes Erbium-Doped Fiber Amplifier (EDFA) that input pumping light is amplified, through wave multiplexer, enter fiber coupler together with flashlight, due to the effect of Cross-phase Modulation, cause that the phase place of the light transmitting in coupling mechanism changes, thereby changed the path of output light, realized logic device translation function.
The advantages such as all-optical logic utensil of the present invention has highly sensitive, and 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.
In Fig. 2
e 1 the output power that represents fiber coupler the 3rd port (h3),
e 2 the output power that represents fiber coupler the 4th port (h4).
Embodiment
As shown in Figure 1, the all-optical logic device of the present embodiment based on asymmetric coupler Cross-phase Modulation comprises pumping source 1-1, 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, 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), the second port b2 of Erbium-Doped Fiber Amplifier (EDFA) is connected with the first port c1 of bandpass filter, the 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, the second port d4 of the second polarizer is connected with the first port f3 of the second isolator, the 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, the second port e2 of the 3rd polarizer is connected with the first port g1 of the 3rd isolator, the 3rd port i3 of wave multiplexer is connected with the first port h1 of fiber coupler, the second port g2 of the 3rd isolator is connected with the second port h2 of fiber coupler, the 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, the different output power of calculating fiber coupler output port, according to extinction ratio decision logic device logic function.
Fig. 2 has shown: in given power input situation, and the logic device family curve that the output power of two output ports changes with pumping light power.Cusp means that the path of output optical signal changes, and pump power is now called threshold power.
Table 1 represents to select a pump power, the truth table of the all-optical logic device drawing according to different input combinations.H1 in table, h2 and h3, h4 represents respectively the input/output port of fiber coupler, logical value " 0 " and " 1 " indicate no signal input.
x ij be 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, in conjunction with different input combinations, realize different photoswitch logic gates simultaneously.
Above the preferred embodiments of the present invention and principle are had been described in detail, for those of ordinary skill in the art, according to thought provided by the invention, in embodiment, will change, and these changes also should be considered as protection scope of the present invention.
Claims (5)
1. the all-optical logic device based on 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), 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), 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 polarizer, and second port (d2) of the first polarizer is connected with first port (f1) of the first isolator; Signal source (9) is connected with first port (d3) of the second polarizer, second port (d4) of the second polarizer is connected with first port (f3) of the second isolator, second port (f2) of the first isolator is connected with first port (i1) of wave multiplexer, and second port (f4) of the second isolator is connected with second port (i2) of wave multiplexer; Signal source (10) is connected with first port (e1) of the 3rd polarizer, second port (e2) of the 3rd polarizer is connected with first port (g1) of the 3rd isolator, the 3rd port (i3) of wave multiplexer is connected with first port (h1) of fiber coupler, second port (g2) of the 3rd isolator is connected with second port (h2) of fiber coupler, the 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.
2. all-optical logic device as claimed in claim 1, is characterized in that: the cross-coupling coefficient of fiber coupler (7-1) is 0.5.
3. all-optical logic device as claimed in claim 1, is characterized in that: first port (i1) of wave multiplexer (6-1) is 50% port, and the second port (i2) is 50% port.
4. as claimed any one in claims 1 to 3 all-optical logic device, is characterized in that: the signal wavelength range of first signal source (9) and secondary signal source (10) generation is 1500nm-1550nm, and power is 10mW.
5. as claimed any one in claims 1 to 3 all-optical logic device, is characterized in that: the pumping wave wavelength coverage that pumping source (1-1) produces is 800-900nm, and power bracket is 0 ~ 4kW.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969912A (en) * | 2014-05-05 | 2014-08-06 | 杭州电子科技大学 | Sagnac ring full-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 |
| 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) |
| 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 |
| CN106772819A (en) * | 2016-12-01 | 2017-05-31 | 南京邮电大学 | The interference-type all-optical switch of chalcogenide glass photonic crystal fiber 2 × 2 and control method |
| CN110320726A (en) * | 2019-07-04 | 2019-10-11 | 杭州电子科技大学 | A kind of all-optical logic gate of three core fibre coupler of active nonlinear |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969912A (en) * | 2014-05-05 | 2014-08-06 | 杭州电子科技大学 | Sagnac ring full-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 |
| 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 |
| 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) |
| CN106772819A (en) * | 2016-12-01 | 2017-05-31 | 南京邮电大学 | The interference-type all-optical switch of chalcogenide glass photonic crystal fiber 2 × 2 and control method |
| 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 |
| CN110320726A (en) * | 2019-07-04 | 2019-10-11 | 杭州电子科技大学 | A kind of all-optical logic gate of three core fibre coupler of active nonlinear |
| 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 |
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