CN102411985B - Storing device and method of optical fibre double-ring capable of erasing optical information - Google Patents
Storing device and method of optical fibre double-ring capable of erasing optical information Download PDFInfo
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- CN102411985B CN102411985B CN201110269887.0A CN201110269887A CN102411985B CN 102411985 B CN102411985 B CN 102411985B CN 201110269887 A CN201110269887 A CN 201110269887A CN 102411985 B CN102411985 B CN 102411985B
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Abstract
The invention discloses a storing device and method of optical fibre double-ring capable of erasing optical information, wherein a polarized control apparatus and an optical gain apparatus are added in the optical fibre ring of the double-ring coupling all-optical buffer, wherein the polarized control apparatus generates 0 or phi/2 of included angle between two oppositely transmitted signal lights in the polarization direction; the phase difference control apparatus generates 0 or phi of phase difference between two signal lights; the optical gain apparatus compensates the power of the signal light reentered in the double ring via a coupler. The invention can realize the write-once of the buffer, has multiple reading and erasing functions, and also has simple structure and easy manufacture and is a new concept for improving the buffer.
Description
Technical field
The invention belongs to optical storage technology field, particularly the erasable optical information memory storage of a kind of optical fiber dual ring and storage means.
Background technology
Along with the high speed of information expands, the transmission demand that electric switched communication gradually can not satisfying magnanimity information, all optical communication has become the development trend of communication technical field.Light exchange is a gordian technique of all optical network, and optical information storage is the basis of realizing light exchange.In order to realize all optical network, carry out optical information storage development very necessary.
At present, people have proposed as fibre delay line, the full optical buffer based on NOLM, the full optical buffer based on TOAD, the multiple buffer structures that realize optical information buffer memory such as optical buffer based on M-Z interferometer, the disclosed a kind of double-ring coupled all optical buffer storage based on 3x3 fiber coupler of Chinese invention patent instructions that on May 14th, 2003, notification number was CN1417604 and the Chinese invention patent that on January 30th, 2008, notification number was CN101114886 disclose a kind of polarization type optical caching device and control method thereof, are optical buffer.Optical buffer can not be realized the function of the optical memories such as repeatedly reading and wipe of optical information.
Summary of the invention
For the deficiencies in the prior art, the invention provides the erasable optical information memory storage of a kind of optical fiber dual ring and storage means, the present invention has realized the optical information storage function that write-once repeatedly reads and can wipe; Simple in structure, easy to manufacture.
Technical scheme of the present invention is: the erasable optical information memory storage of a kind of optical fiber dual ring, comprise double-ring coupled all optical buffer storage, and Polarization Control device and gain of light device are set in the fiber optic loop of double-ring coupled all optical buffer storage.
Described Polarization Control device is placed in symmetrical position of departing from of fiber optic loop.
Described Polarization Control device is Faraday magnetooptical effect Polarization Control device, or piezoelectricity control type Polarization Control device, or semiconductor optical amplifier type Polarization Control device.
Described semiconductor optical amplifier type Polarization Control device is the optical drive based on nonlinear polarization rotation effect, or electric drive.
Described gain of light device is rare-earth doped optical fibre amplifier, or semiconductor optical amplifier.
The storage means of the erasable optical information memory storage of a kind of optical fiber dual ring of the present invention:
Light polarization device of the present invention adopts the kind luminous effect device of faraday, by AC power externally-applied magnetic field, produces faraday's magnetic rotation effect, changes the polarization direction of flashlight.
Step 1, mounting equipment
At publication number, be on the architecture basics of CN1417604 Chinese invention patent, at the asymmetric position that encircles 2, add faraday's magnetic opticity device, additional controlled AC power.Because the magnetic rotation effect speed of response is slower, need to lengthen the length of optical fiber 7 20.
Step 2, input signal light
By the first optical fiber 7 input signal lights, through optical circulator 8, the second optical fiber 10, enter 3 * 3 coupling mechanisms 11, be assigned to flashlight isocandela the 43 * 3 coupling mechanism port the 4, the 63 * 3 coupling mechanism port 6.
Step 3, adjustment signal light
By the 4th optical fiber 14, introduce and control light, utilize the Cross-phase Modulation of semiconductor optical amplifier SOA16, make I
4produce phase shifts, with I
6phase differential is π; Regulate faraday's magnetic rotation effect device 22 to make I simultaneously
6polarization direction rotation, at I
6with I
4when entering coupling mechanism, there is angle theta=pi/2 polarization direction.
Step 4, output signal light
Two paths of signals light detours and within one week, gets back to the 63 * 3 coupling mechanism port the 6, the 43 * 3 coupling mechanism port 4 ports through the 7th optical fiber 20, enters 3 * 3 coupling mechanisms 11, and because polarization direction is vertical, two light do not produce interference.By the splitting ratio according to 25: 50: 25 after 3 * 3 coupling mechanism 11 couplings, enter respectively the one 3 * 3 coupling mechanism port one, the 23 * 3 coupling mechanism port the 2, the 33 * 3 coupling mechanism port 3.Enter the light of the 23 * 3 coupling mechanism port 2 as output signal light, through the second optical fiber 10, enter optical circulator 8, finally by the 8th optical fiber 21 outputs.
Step 5, storage signal light
Regulate the first Polarization Controller PC9, the residual signal light polarization direction that makes to be got back to by the one 3 * 3 coupling mechanism port one, the 33 * 3 coupling mechanism port 3 six fibers 19 is consistent, now two light phases are poor is π, by volume two flashlights of double-ring coupled all optical buffer storage will be in six fibers 19,3 * 3 coupling mechanisms 11, the 7th optical fiber 20 circulating propagation.Utilize semiconductor optical amplifier SOA16 that flashlight is amplified to original size, in dicyclo, store.
Step 6, erase signal light
Before inputting new flashlight, need the flashlight being originally cached in optical fiber dual ring to wipe.By the 4th optical fiber 14, introduce and control light, utilizing the Cross-phase Modulation of semiconductor optical amplifier SOA16 is 0 by the two flashlight adjusting offsets of propagating in opposite directions, flashlight will all enter the 23 * 3 coupling mechanism port 2 through 3 * 3 coupling mechanisms 11, through the second optical fiber 10, optical circulator 8, the 8th optical fiber 21 outputs, flashlight full scale clearance in ring.
The storage means of the erasable optical information memory storage of a kind of optical fiber dual ring of the present invention also has:
The nonlinear element that light polarization device of the present invention adopts double-ring coupled all optical buffer storage to carry, as semiconductor optical amplifier.Utilize the polarization direction of the Cross polarization modulation change flashlight of semiconductor optical amplifier.Signal gain device adopts EDFA.
Step 1, mounting equipment
At publication number, be on the architecture basics of CN1417604 Chinese invention patent, at the asymmetric position that encircles 2, add an Erbium-Doped Fiber Amplifier EDFA24, additional pump light.At WDM15 place, increase by a road and control light, from the 9th optical fiber 23 inputs.
Step 2, input signal light
By the first optical fiber 7 input signal lights, through optical circulator 8, the second optical fiber 10, enter 3 * 3 coupling mechanisms 11, be assigned to flashlight isocandela the 43 * 3 coupling mechanism port the 4, the 63 * 3 coupling mechanism port 6.
Step 3, adjustment signal light
By the 4th optical fiber 14, introduced and controlled light one, by semiconductor optical amplifier, SOA16 makes I
4produce phase shifts, with I
6phase differential is π.Regulate the second Polarization Controller PC12 to make two light polarization direction consistent, two flashlights will be in six fibers 19,3 * 3 coupling mechanisms 11, the 7th optical fiber 20 circulating propagation.Work as I
4during for the second time through semiconductor optical amplifier SOA16, by the 9th optical fiber 23, introduce and control light two, make I
4polarization state changes, another I
4and I
6while entering coupling mechanism, polarization angle is θ=pi/2.
Step 4, output signal light
Two paths of signals light detours and within one week, gets back to the 63 * 3 coupling mechanism port the 6, the 43 * 3 coupling mechanism port 4 through the 7th optical fiber 20, enters 3 * 3 coupling mechanisms 11, and because polarization direction is vertical, two light do not produce interference.By the splitting ratio according to 25: 50: 25 after 3 * 3 coupling mechanism 11 couplings, enter respectively the one 3 * 3 coupling mechanism port one, the 23 * 3 coupling mechanism port the 2, the 33 * 3 coupling mechanism port 3.Enter the light of the 23 * 3 coupling mechanism port 2 as output signal light, through the second optical fiber 10, enter optical circulator 8, finally by the 8th optical fiber 21 outputs.
Step 5, storage signal light
Regulate the first Polarization Controller PC9, the residual signal light polarization direction that makes to be got back to by the one 3 * 3 coupling mechanism port one, the 33 * 3 coupling mechanism port 3 ports six fibers 19 is consistent, now two light phases are poor is π, by volume two flashlights of double-ring coupled all optical buffer storage will be in six fibers 19,3 * 3 coupling mechanisms 11, the 7th optical fiber 70 circulating propagation.By the tenth optical fiber 25 input pumping lights, utilize Erbium-Doped Fiber Amplifier EDFA24 to amplify compensation to encircling interior light signal, flashlight is amplified to original size, in dicyclo, store.
Step 6, erase signal light
Before inputting new flashlight, need the flashlight being originally cached in optical fiber dual ring to wipe.By the 4th optical fiber 14, introduce and control light three, through the Cross-phase Modulation of semiconductor optical amplifier SOA16, by the adjusting offset of contrary two flashlights in the direction of propagation, be 0, flashlight will all enter the 23 * 3 coupling mechanism port 2 through 3 * 3 coupling mechanisms 11, through the second optical fiber 10, optical circulator 8, the 8th optical fiber 21 outputs, flashlight full scale clearance in ring.
The invention has the beneficial effects as follows: first, based on optical fiber, the present invention has realized the optical information storage function that write-once repeatedly reads and can wipe; Simple in structure, easy to manufacture.Secondly, the selection of Polarization Control device is varied, both can use faraday's magnetic rotation effect device, also can utilize piezoelectricity control type Polarization Control device, or the nonlinear polarization rotation effect of the SOA that light or electric signal drive, easily realizes technically.Faraday's magnetic rotation effect device and piezoelectricity control type Polarization Control device Polarization Control speed are slower, can be used for the slower optical information of storage transfer rate; The cross polarization effect device Polarization Control speed of SOA is ps magnitude, can be used for the very fast optical information of storage transfer rate.Different optical polarization controller parts, can meet different application requirements, applicable to wide spectrums such as optical communication, optical information processing.In addition, what optical memory was stored is the former light pulse that forms optical information, is conducive to signal identification and the Information Read-Out of former optical information, is conducive to effective utilization of optical source wavelength resource.
Accompanying drawing explanation
Fig. 1 is that the embodiment of the present invention one be take the storage device structural representation that Faraday magnetooptical effect device is light polarizer;
Fig. 2 is that the embodiment of the present invention two be take the storage device structural representation that semiconductor optical amplifier SOA is light polarizer;
In figure: 1 is the one 3 * 3 coupling mechanism port, 2 is the 23 * 3 coupling mechanism port, 3 is the 33 * 3 coupling mechanism port, 4 is the 43 * 3 coupling mechanism port, 5 is the 53 * 3 coupling mechanism port, 6 is the 63 * 3 coupling mechanism port, 7 is the first optical fiber, 8 is optical circulator, 9 is the first Polarization Controller PC, 10 is the second optical fiber, 11 is 3 * 3 coupling mechanisms 11, 12 is the second Polarization Controller PC, 13 is the 3rd optical fiber, 14 is the 4th optical fiber, 15 is first wave division multiplexer WDM, 16 is semiconductor optical amplifier SOA, 17 is Second Wave division multiplexer WDM, 18 is the 5th optical fiber, 19 is six fibers, 20 is the 7th optical fiber, 21 is the 8th optical fiber, 22 is faraday's magnetic rotation effect device, 23 is the 9th optical fiber, 24 is Erbium-Doped Fiber Amplifier EDFA, 25 is the tenth optical fiber, 26 is the 3rd wavelength division multiplexer WDM, 27 is the 4th wavelength division multiplexer WDM, 28 is the 11 optical fiber.
Embodiment
In order to realize once input, repeatedly read and erasable optical information storage function, the present invention discloses on the basis of a kind of polarization type optical caching device and control method thereof at the disclosed a kind of double-ring coupled all optical buffer storage based on 3x3 fiber coupler of Chinese invention patent instructions that notification number is CN1417604 on May 14th, 2003 and the Chinese invention patent that on January 30th, 2008, notification number was CN101114886, utilize light polarization device to make two flashlights of propagating in opposite directions in ring when propagating into coupling mechanism, produce polarization angle pi/2, with control light, making the phase differential of two flashlights is π, two light of propagating in opposite directions in ring do not produce interference when propagating into coupling mechanism, two light enter respectively 3 ports according to the special splitting ratio of 3 * 3 coupling mechanisms, wherein a road is as output signal, other two-way are also got back in ring.Getting back to light in ring, with PC, to be adjusted to polarization direction identical, then it is wide little through semiconductor optical amplifier, to be amplified to original signal, buffer memory in ring.In the time of only need to making two flashlights arrive coupling mechanism with input control light while again reading, again produce polarization angle pi/2, can repeat above-mentioned output procedure, do not need to re-enter flashlight.It is 0 that introducing control light makes two light phases poor, and adjustment PC makes its polarization direction identical, and it is long mutually that two light produce interference when being transmitted to coupling mechanism, all by delivery outlet, exported, and the flashlight in ring is wiped free of.
Polarization Control device used in the present invention can be automatically controlled Faraday magnetooptical effect Polarization Control device and piezoelectricity control type Polarization Control device, or light-operated semi-conductor amplifier type Polarization Control device.Polarization Control device is placed in fiber optic loop and departs from symmetric position, in different time points, two light of propagating is in opposite directions carried out to Polarization Control.In fiber optic loop, for flashlight being amplified to the gain of light device of compensation, be rare-earth doped optical fibre amplifier, or semiconductor optical amplifier.
Below in conjunction with accompanying drawing, describe the embodiment of storage means of the present invention in detail:
Embodiment mono-
Light polarization device of the present invention adopts the kind luminous effect device of faraday, by AC power externally-applied magnetic field, produces faraday's magnetic rotation effect, changes the polarization direction of flashlight.
Step 1, mounting equipment
At publication number, be on the architecture basics of CN1417604 Chinese invention patent, at the asymmetric position that encircles 2, add faraday's magnetic opticity device, additional controlled AC power.Because the magnetic rotation effect speed of response is slower, need to lengthen the length of optical fiber 7 20.
Step 2, input signal light
By the first optical fiber 7 input signal lights, through optical circulator 8, the second optical fiber 10, enter 3 * 3 coupling mechanisms 11, be assigned to flashlight isocandela the 43 * 3 coupling mechanism port the 4, the 63 * 3 coupling mechanism port 6.
Step 3, adjustment signal light
By the 4th optical fiber 14, introduce and control light, utilize the Cross-phase Modulation of semiconductor optical amplifier SOA16, make I
4produce phase shifts, with I
6phase differential is π; Regulate faraday's magnetic rotation effect device 22 to make I simultaneously
6polarization direction rotation, at I
6with I
4when entering coupling mechanism, there is angle theta=pi/2 polarization direction.
Step 4, output signal light
Two paths of signals light detours and within one week, gets back to the 63 * 3 coupling mechanism port the 6, the 43 * 3 coupling mechanism port 4 ports through the 7th optical fiber 20, enters 3 * 3 coupling mechanisms 11, and because polarization direction is vertical, two light do not produce interference.By the splitting ratio according to 25: 50: 25 after 3 * 3 coupling mechanism 11 couplings, enter respectively the one 3 * 3 coupling mechanism port one, the 23 * 3 coupling mechanism port the 2, the 33 * 3 coupling mechanism port 3.Enter the light of the 23 * 3 coupling mechanism port 2 as output signal light, through the second optical fiber 0, enter optical circulator 8, finally by the 8th optical fiber 21 outputs.
Step 5, storage signal light
Regulate the first Polarization Controller PC9, the residual signal light polarization direction that makes to be got back to by the one 3 * 3 coupling mechanism port one, the 33 * 3 coupling mechanism port 3 six fibers 19 is consistent, now two light phases are poor is π, by volume two flashlights of double-ring coupled all optical buffer storage will be in six fibers 19,3 * 3 coupling mechanisms 11, the 7th optical fiber 20 circulating propagation.Utilize semiconductor optical amplifier SOA16 that flashlight is amplified to original size, in dicyclo, store.
Step 6, erase signal light
Before inputting new flashlight, need the flashlight being originally cached in optical fiber dual ring to wipe.By the 4th optical fiber 14, introduce and control light, utilizing the Cross-phase Modulation of semiconductor optical amplifier SOA16 is 0 by the two flashlight adjusting offsets of propagating in opposite directions, flashlight will all enter the 23 * 3 coupling mechanism port 2 through 3 * 3 coupling mechanisms 11, through the second optical fiber 10, optical circulator 8, the 8th optical fiber 21 outputs, flashlight full scale clearance in ring.
Embodiment bis-
The nonlinear element that light polarization device of the present invention adopts double-ring coupled all optical buffer storage to carry, as semiconductor optical amplifier.Utilize the polarization direction of the Cross polarization modulation change flashlight of semiconductor optical amplifier.Signal gain device adopts EDFA.
Step 1, mounting equipment
At publication number, be on the architecture basics of CN1417604 Chinese invention patent, at the asymmetric position that encircles 2, add an Erbium-Doped Fiber Amplifier EDFA24, additional pump light.At WDM15 place, increase by a road and control light, from the 9th optical fiber 23 inputs.
Step 2, input signal light
By the first optical fiber 7 input signal lights, through optical circulator 8, the second optical fiber 10, enter 3 * 3 coupling mechanisms 11, be assigned to flashlight isocandela the 43 * 3 coupling mechanism port the 4, the 63 * 3 coupling mechanism port 6.
Step 3, adjustment signal light
By the 4th optical fiber 14, introduced and controlled light one, by semiconductor optical amplifier, SOA16 makes I
4produce phase shifts, with I
6phase differential is π.Regulate the second Polarization Controller PC12 to make two light polarization direction consistent, two flashlights will be in six fibers 19,3 * 3 coupling mechanisms 11, the 7th optical fiber 20 circulating propagation.Work as I
4during for the second time through semiconductor optical amplifier SOA16, by the 9th optical fiber 23, introduce and control light two, make I
4polarization state changes, another I
4and I
6while entering coupling mechanism, polarization angle is θ=pi/2.
Step 4, output signal light
Two paths of signals light detours and within one week, gets back to the 63 * 3 coupling mechanism port the 6, the 43 * 3 coupling mechanism port 4 through the 7th optical fiber 20, enters 3 * 3 coupling mechanisms 11, and because polarization direction is vertical, two light do not produce interference.By the splitting ratio according to 25: 50: 25 after 3 * 3 coupling mechanism 11 couplings, enter respectively the one 3 * 3 coupling mechanism port one, the 23 * 3 coupling mechanism port the 2, the 33 * 3 coupling mechanism port 3.Enter the light of the 23 * 3 coupling mechanism port 2 as output signal light, through the second optical fiber 10, enter optical circulator 8, finally by the 8th optical fiber 21 outputs.
Step 5, storage signal light
Regulate the first Polarization Controller PC9, the residual signal light polarization direction that makes to be got back to by the one 3 * 3 coupling mechanism port one, the 33 * 3 coupling mechanism port 3 ports six fibers 19 is consistent, now two light phases are poor is π, by volume two flashlights of double-ring coupled all optical buffer storage will be in six fibers 19,3 * 3 coupling mechanisms 11, the 7th optical fiber 70 circulating propagation.By the tenth optical fiber 25 input pumping lights, utilize Erbium-Doped Fiber Amplifier EDFA24 to amplify compensation to encircling interior light signal, flashlight is amplified to original size, in dicyclo, store.
Step 6, erase signal light
Before inputting new flashlight, need the flashlight being originally cached in optical fiber dual ring to wipe.By the 4th optical fiber 14, introduce and control light three, through the Cross-phase Modulation of semiconductor optical amplifier SOA16, by the adjusting offset of contrary two flashlights in the direction of propagation, be 0, flashlight will all enter the 23 * 3 coupling mechanism port 2 through 3 * 3 coupling mechanisms 11, through the second optical fiber 10, optical circulator 8, the 8th optical fiber 21 outputs, flashlight full scale clearance in ring.
Claims (2)
1. a storage means that is applied to the erasable optical information memory storage of optical fiber dual ring, ring 1 in optical fiber dual ring is by the first Polarization Controller PC(9), 1 of six fibers (19) and 3 * 3 coupling mechanisms (11), 3 ports are in series, ring 2 is by a WDM(15), semiconductor optical amplifier SOA(16), fiber coupler (17), the second Polarization Controller PC(12), the 7th optical fiber (20), with 4 of 3 * 3 coupling mechanisms (11), 6 ports are in series, it is characterized in that: light polarization device adopts the kind luminous effect device of faraday, by AC power externally-applied magnetic field, produce faraday's magnetic rotation effect, change the polarization direction of flashlight, its storage means is:
Step 1, mounting equipment
Asymmetric position at ring 2 adds faraday's magnetic opticity device (22), additional controlled AC power, the length of lengthening the 7th optical fiber (20);
Step 2, input signal light
By the first optical fiber (7) input signal light, through optical circulator (8), the second optical fiber (10), enter 3 * 3 coupling mechanisms (11), be assigned to the 43 * 3 coupling mechanism port (4) to flashlight isocandela, the 63 * 3 coupling mechanism port (6) produces respectively I
4and I
6two paths of signals light;
Step 3, adjustment signal light
By the 4th optical fiber (14), introduce to control light, utilize semiconductor optical amplifier SOA(16) Cross-phase Modulation, make I
4produce phase shifts, with I
6phase differential is π; Regulate faraday's magnetic rotation effect device (22) to make I simultaneously
6polarization direction rotation, at I
6with I
4when entering coupling mechanism, there is angle theta=pi/2 polarization direction;
Step 4, output signal light
Two paths of signals light detours and within one week, gets back to the 63 * 3 coupling mechanism port (6), the 43 * 3 coupling mechanism port (4) through the 7th optical fiber (20), enters 3 * 3 coupling mechanisms (11), and because polarization direction is vertical, two light do not produce interference; By entering respectively the one 3 * 3 coupling mechanism port (1), the 23 * 3 coupling mechanism port (2), the 33 * 3 coupling mechanism port (3) according to the splitting ratio of 25:50:25 after 3 * 3 coupling mechanisms (11) coupling; Enter the light of the 23 * 3 coupling mechanism port (2) as output signal light, through the second optical fiber (10), enter optical circulator (8), finally by the 8th optical fiber (21) output;
Step 5, storage signal light
Regulate the first Polarization Controller PC(9), the residual signal light polarization direction that makes to be got back to by the one 3 * 3 coupling mechanism port (1), the 33 * 3 coupling mechanism port (3) six fibers (19) is consistent, now two light phases are poor is π, by volume two flashlights of double-ring coupled all optical buffer storage will be in six fibers (19), 3 * 3 coupling mechanisms (11), the 7th optical fiber (20) circulating propagation; Utilize semiconductor optical amplifier SOA(16) flashlight is amplified to original size, in dicyclo, store;
Step 6, erase signal light
Before inputting new flashlight, need the flashlight being originally cached in optical fiber dual ring to wipe; By the 4th optical fiber (14), introduce and control light, utilize semiconductor optical amplifier SOA(16) Cross-phase Modulation by the two flashlight adjusting offsets of propagating in opposite directions, be 0, flashlight will all enter the 23 * 3 coupling mechanism port (2) through 3 * 3 coupling mechanisms (11), through the second optical fiber (10), optical circulator (8), the 8th optical fiber (21) output, flashlight full scale clearance in ring.
2. a storage means that is applied to the erasable optical information memory storage of optical fiber dual ring, ring 1 in optical fiber dual ring is by the first Polarization Controller PC(9), 1 of six fibers (19) and 3 * 3 coupling mechanisms (11), 3 ports are in series, ring 2 is by a WDM(15), semiconductor optical amplifier SOA(16), fiber coupler (17), the second Polarization Controller PC(12), the 7th optical fiber (20), with 4 of 3 * 3 coupling mechanisms (11), 6 ports are in series, it is characterized in that: the nonlinear element semiconductor optical amplifier that light polarization device adopts double-ring coupled all optical buffer storage to carry, utilize the polarization direction of the Cross polarization modulation change flashlight of semiconductor optical amplifier, signal gain device adopts EDFA, its storage means:
Step 1, mounting equipment
Asymmetric position at ring 2 adds an Erbium-Doped Fiber Amplifier EDFA(24), additional pump light; At a WDM(15) locate to increase a road control light, from the 9th optical fiber (23) input;
Step 2, input signal light
By the first optical fiber (7) input signal light, through optical circulator (8), the second optical fiber (10), enter 3 * 3 coupling mechanisms (11), be assigned to the 43 * 3 coupling mechanism port (4) to flashlight isocandela, the 63 * 3 coupling mechanism port (6) produces respectively I4 and I6 two paths of signals light;
Step 3, adjustment signal light
By the 4th optical fiber (14), introduce to control light one, by semiconductor optical amplifier SOA(16) make I
4produce phase shifts, with I
6phase differential is π; Regulate the second Polarization Controller PC(12) make two light polarization direction consistent, two flashlights will be in six fibers (19), 3 * 3 coupling mechanisms (11), the 7th optical fiber (20) circulating propagation; Work as I
4pass through for the second time semiconductor optical amplifier SOA(16) time by the 9th optical fiber (23), introduce to control light two, make I
4polarization state changes, another I
4and I
6while entering coupling mechanism, polarization angle is θ=pi/2;
Step 4, output signal light
Two paths of signals light detours and within one week, gets back to the 63 * 3 coupling mechanism port (6), the 43 * 3 coupling mechanism port (4) through the 7th optical fiber (20), enters 3 * 3 coupling mechanisms (11), and because polarization direction is vertical, two light do not produce interference; By entering respectively the one 3 * 3 coupling mechanism port (1), the 23 * 3 coupling mechanism port (2), the 33 * 3 coupling mechanism port (3) according to the splitting ratio of 25:50:25 after 3 * 3 coupling mechanisms (11) coupling; Enter the light of the 23 * 3 coupling mechanism port (2) as output signal light, through the second optical fiber (10), enter optical circulator (8), finally by the 8th optical fiber (21) output;
Step 5, storage signal light
Regulate the first Polarization Controller PC(9), the residual signal light polarization direction that makes to be got back to by the one 3 * 3 coupling mechanism port (1), the 33 * 3 coupling mechanism port (3) six fibers (19) is consistent, now two light phases are poor is π, by volume two flashlights of double-ring coupled all optical buffer storage will be in six fibers (19), 3 * 3 coupling mechanisms (11), the 7th optical fiber (20) circulating propagation; By the tenth optical fiber (25) input pumping light, utilize Erbium-Doped Fiber Amplifier EDFA(24) to encircling interior light signal, amplify compensation, flashlight is amplified to original size, in dicyclo, store;
Step 6, erase signal light
Before inputting new flashlight, need the flashlight being originally cached in optical fiber dual ring to wipe; By the 4th optical fiber (14), introduce and control light three, through semiconductor optical amplifier SOA(16) Cross-phase Modulation by the adjusting offset of contrary two flashlights in the direction of propagation, be 0, flashlight will all enter the 23 * 3 coupling mechanism port (2) through 3 * 3 coupling mechanisms (11), through the second optical fiber (10), optical circulator (8), the 8th optical fiber (21) output, flashlight full scale clearance in ring.
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|---|---|---|---|
| CN201110269887.0A CN102411985B (en) | 2011-09-13 | 2011-09-13 | Storing device and method of optical fibre double-ring capable of erasing optical information |
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|---|---|---|---|
| CN201110269887.0A CN102411985B (en) | 2011-09-13 | 2011-09-13 | Storing device and method of optical fibre double-ring capable of erasing optical information |
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| CN102411985B true CN102411985B (en) | 2014-08-20 |
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| WO2016095164A1 (en) * | 2014-12-18 | 2016-06-23 | 华为技术有限公司 | Optical memory and control method therefor |
| CN105792032B (en) * | 2016-04-18 | 2021-12-21 | 浙江大学 | All-optical buffer based on arrayed waveguide grating router |
| CN112261516B (en) * | 2020-11-18 | 2023-01-24 | 南京工程学院 | Device and method for realizing optical buffer by using slow light effect in semiconductor optical amplifier |
| CN113724758B (en) * | 2021-09-01 | 2023-07-14 | 哈尔滨工程大学 | A multi-core optical fiber memristive device and "erase, write, read" scheme |
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