CN207150610U - A kind of quantum key dispatching system based on photoswitch control - Google Patents
A kind of quantum key dispatching system based on photoswitch control Download PDFInfo
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- CN207150610U CN207150610U CN201720929691.2U CN201720929691U CN207150610U CN 207150610 U CN207150610 U CN 207150610U CN 201720929691 U CN201720929691 U CN 201720929691U CN 207150610 U CN207150610 U CN 207150610U
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Abstract
A kind of quantum key dispatching system based on photoswitch control, by increasing a polarization beam apparatus in receiving terminal, deviation-rectifying system is abandoned, the lengthy and jumbled degree of system has been simplified, reduces production cost；One phase is only adjusted by an interference ring, to there was only 10 minus six powers magnitudes of existing way using the requirement of DAC and analogue amplifier, greatly reduce the requirement of system design；The break-make of different waveguide interference ring phase-modulation is selected using photoswitch, the use of the polarization-maintaining beam splitter and rear end intensity modulator of interference ring front end is abandoned, control photoswitch to select the break-make of each phase using high-speed digital signal, reduce the complexity of cost and system.In addition, the utility model uses the interference ring made by planar optical waveguide, because planar optical waveguide has polarization insensitive, so that system is without extra polarization compensation means, the manufacture craft of waveguide is extremely ripe, can reach sub-micrometer scale, preferably improves the key of system into code check.
Description
Technical field
It the utility model is related to optical transport safety communication technology field, more particularly to a kind of quantum based on photoswitch control
Key dispatching system.
Background technology
With a wide range of popularization of internet, the information transmission between the mankind has reached unprecedented quantity and frequency,
On the internet, therefore, the mankind have also arrived unprecedented various privacy informations to the demand of secret communication for exposure more and more
Height.The cipher mode of present internet information safety is referred to as " public-key cryptography " cryptosystem, and its principle is to pass through encryption
Algorithm, the public-key cryptography propagated on network is generated, and stay in the private key of computer-internal, two keys must coordinate and make
With complete encryption and decryption processes could be realized.
The encryption standard that modern the Internet uses is the RSA Algorithm being born the 1970s, i.e., using matter several greatly because
Son, which decomposes, to be difficult to calculate to ensure the security of key.
Quantum-key distribution is that physicist Bennett in 1984 and cryptologist Brassard are proposed based on quantum force
The BB84 agreements of measuring principle are learned, quantum-key distribution can fundamentally ensure that the security of key.
Quantum key produces flashlight in transmitting terminal in the prior art, by traditional quantum channel transmitting procedure, by
It is more big changes in by the effect such as fiber channel birefringence, its polarization state, influences the interference effect in optical signal later stage, can make
The loss of integral key, at present, deviation-rectifying system can be increased in receiving terminal to solve the above problems, by deviation-rectifying system come also
The polarization state of former optical signal, but deviation-rectifying system needs complicated hardware and software section composition, to whole encryption key distribution system
System brings the complexity of total system and improves production cost；In addition, optical signal passes through general single mode fiber interference ring
Long galianconism different paths after its polarization state different changes can occur and cause result of interference unobvious, so normal
Extra polarization compensation technology is needed to use in making to ensure that the polarization state of the light by dissimilar arm is identical, is further increased
System complexity and improve production cost.
Utility model content
The utility model purpose is to provide a kind of quantum key dispatching system based on photoswitch control, existing to solve
Quantum key distribution system needs system increase deviation-rectifying system and polarization compensation skill to improve key generation efficiency in technology
Art, so that system adds complexity and improves the technical bug of production cost.
What the technical solution of the utility model was realized in：
A kind of quantum key dispatching system based on photoswitch control, including the transmitting terminal connected by quantum channel is with connecing
Receiving end, the transmitting terminal include transmitting terminal driving plate, signal laser, synchronous laser, intensity modulator, 1*4 roads photoswitch,
Four road Waveguide interference rings, the first adjustable attenuator, the second adjustable attenuator and transmitting terminal multiplexer, four road Waveguide interference
Ring arm length difference is different, and its phase difference is respectively 0, pi/2, π, 3 pi/2s, and the signal laser is sequentially connected intensity modulator, 1*4
Road photoswitch, 1*4 roads photoswitch connect four road Waveguide interference rings respectively, and the output end of the four roads Waveguide interference ring connects
Connect the first adjustable attenuator, first adjustable attenuator connects transmitting terminal multiplexer, and the synchronous laser is sequentially connected the
Two adjustable attenuators and transmitting terminal multiplexer, first adjustable attenuator are connected transmitting terminal multiplexing with the second adjustable attenuator
Same one end of device, the transmitting terminal driving plate connect signal laser, intensity modulator, 1*4 roads photoswitch, Waveguide interference respectively
Ring, synchronous laser, the first adjustable attenuator and the second adjustable attenuator；
The receiving terminal includes receiving terminal driving plate, receiving terminal multiplexer, synchroprobe, polarization beam apparatus, two-way ripple
Interference ring and single-photon detector are led, the receiving terminal multiplexer connects transmitting terminal multiplexer by quantum channel, described to connect
The other end of receiving end multiplexer connects synchroprobe and polarization beam apparatus respectively, and the polarization beam apparatus connects two respectively successively
Road Waveguide interference ring, wherein, two-way Waveguide interference ring is respectively connected with two-way single-photon detector, the receiving terminal driving plate difference
Connect synchroprobe, Waveguide interference ring and single-photon detector.
Preferably, the Waveguide interference ring includes front end coupler, long-armed Wave guide unit, galianconism Wave guide unit and rear end
Coupler, the output end of the front end coupler connect long-armed Wave guide unit and galianconism Wave guide unit, the long-armed ripple respectively
The output end for leading unit and galianconism Wave guide unit connects rear end coupler respectively, and the long-armed Wave guide unit includes the first coupling
Device, delay waveguide and the second coupler, first coupler connects the output end of front end coupler by silicon waveguide, described
First coupler connects the second coupler by the waveguide that is delayed, and second coupler connects rear end coupler by silicon waveguide
Input, the galianconism Wave guide unit is using the output end of silicon waveguide connection front end coupler and the input of rear end coupler
Hold, phase-modulator is provided with the long-armed Wave guide unit and/or galianconism Wave guide unit.
Preferably, the delay waveguide is the waveguide of low-loss silicon, silica waveguide, SiON waveguides, Si3N4Waveguide and poly-
One kind or combination in compound waveguide, adjustable attenuator is provided with the galianconism Wave guide unit.
Preferably, the signal laser and synchronous laser are same multiplexed laser, and the multiplexed laser can be adopted
With time-multiplexed mode transmission signal light and synchronizable optical, the transmitting terminal multiplexer is adaptive multiplexer, and the receiving terminal is answered
It is solution adaptive multiplexer with device.
A kind of quantum key distribution method based on photoswitch control, comprises the following steps：
1) laser triggers：Transmitting terminal utilizes same clock signal difference trigger signal laser and synchronous laser hair
Project flashlight and synchronizable optical, the flashlight as modulation light, the synchronizable optical as synchronous transmission of signal to receiving terminal by
Synchroprobe response is used in receiving terminal；
2) state modulation is inveigled：The flashlight of signal laser transmitting carries out random strength modulation by intensity modulator, adjusts
It is made for signal state, inveigles state or vacuum state；
3) transmitting terminal is interfered：Flashlight is divided into by Si Lulu by 1*4 roads photoswitch, is connected respectively to complete by waveguide fabrication
The different Waveguide interference ring of the tunnel arm length differences of Cheng tetra-, the phase difference between each Waveguide interference ring are followed successively by 0, pi/2, π, 3 pi/2s, and
Select different paths to carry out break-make selection by 1*4 roads photoswitch, complete the selection of transmitting terminal out of phase modulation；
4) automatically controlled adjustable attenuator is decayed to flashlight：The flashlight that phase-modulation is completed by depolarizer is disappeared
Partially, light pulse is decayed to single photon magnitude by the flashlight after depolarized by the first adjustable attenuator, and synchronizable optical can by second
Controlled attenuator adjusts synchronizable optical the strength range that can be responded to receiving terminal；
5) flashlight and synchronizable optical throughput subchannel transmission：Flashlight passes through quantum with synchronizable optical after transmitting terminal is compound
Transmission decomposes again to receiving terminal, and in receiving terminal, and flashlight enters polarization beam apparatus, and synchronizable optical passes through synchronous optical detection
Device detects；
6) polarization beam apparatus beam splitting：The light of asynchronous polarization is decomposed into horizontal polarization direction by polarization beam apparatus and hung down
Straight polarization direction；
7) receiving terminal is interfered：The flashlight of horizontal polarization direction and vertical polarization is respectively connected to two brachiums of two-way
The different Waveguide interference ring of difference carries out phase-modulation, and phase difference is respectively 0, pi/2, completes the selection of receiving terminal out of phase；
8) single-photon detector detects：Single-photon detector detects optical signals, and safe key is produced for subsequent treatment.
Preferably, in the step 5), wavelength-division multiplex or time-division are used transmitting terminal is compound to flashlight and synchronizable optical
The mode of multiplexing is carried out, and wavelength-division multiplex or solution time division multiplexing mode progress are solved in corresponding use of receiving terminal decomposition.
Preferably, if the mode of the step 5) flashlight and synchronizable optical multiplexing of transmission is used when being time-multiplexed, the letter
Number laser can use any one laser timesharing to send flashlight and synchronizable optical with synchronous laser.
Compared with prior art, the utility model has following beneficial effect：
(1) quantum key dispatching system of the present utility model, by increasing a polarization beam apparatus in receiving terminal, by signal
Light is decomposed into two vertical polarization states, completes the interference under respective polarization state using polarization maintaining optical fibre interference ring, obtains preferably
Result of interference, avoiding birefringence effect in optical fiber transmitting procedure influences influence of the polarization state to result of interference, abandons simultaneously
Deviation-rectifying system, simplifies the lengthy and jumbled degree of system, also reduces production cost；
(2) the utility model only adjusts a phase by an interference ring, to used DAC and analogue amplifier
It is required that there was only 10 minus six powers magnitudes of existing way, the requirement of system design is greatly reduced.Wherein in existing way, sending out
Penetrate end and four phases are adjusted using an interference ring, it is necessary to which high-speed DAC turns to modulation voltage during this regulation again
Change, it is necessary to which High speed analog amplifier is amplified the size to required by interference ring to modulation voltage after conversion；In addition, this practicality
It is new that the break-make of different waveguide interference ring phase-modulation is selected using photoswitch, abandon the polarization-maintaining beam splitter of interference ring front end
And the use of rear end intensity modulator, control photoswitch to select the break-make of each phase using high-speed digital signal, reduce
The complexity of cost and system；
(3) the utility model uses the interference ring made by planar optical waveguide, because planar optical waveguide has polarization unwise
Perception so that system is without extra polarization compensation means, and traditional fiber interferometer is manually to manufacture mostly in addition, and precision is about
Tens micron dimensions, its manufacturing process is complex, and the manufacture craft of waveguide is extremely ripe, can reach sub-micrometer scale,
The key of system is preferably improved into code check.
Brief description of the drawings
Fig. 1 is the theory diagram of quantum key dispatching system of the utility model based on Waveguide interference ring；
Fig. 2 is the theory diagram of the utility model Waveguide interference ring.
In figure：Transmitting terminal 100, transmitting terminal driving plate 101, signal laser 102, synchronous laser 103, intensity modulator
104,1*4 road photoswitches 105, Waveguide interference ring 106, the first adjustable attenuator 107, the second adjustable attenuator 108, transmitting terminal is multiple
With device 109, depolarizer 110, receiving terminal 200, receiving terminal driving plate 201, receiving terminal multiplexer 202, synchroprobe 203, partially
Shake beam splitter 204, single-photon detector 205, front end coupler 1061, rear end coupler 1062, the first coupler 1063, delay
Waveguide 1064, the second coupler 1065, silicon waveguide 1066, phase-modulator 1067, the 3rd adjustable attenuator 1068, quantum channel
300。
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the utility model is clearly and completely described.
As shown in figure 1, a kind of quantum key dispatching system based on Waveguide interference ring, including connected by quantum channel
Transmitting terminal 100 and receiving terminal 200, the transmitting terminal 100 include transmitting terminal driving plate 101, signal laser 102, synchronous laser
Device 103, intensity modulator 104,1*4 roads photoswitch 105, four road Waveguide interference rings 106, the first adjustable attenuator 107, second can
Controlled attenuator 108 and transmitting terminal multiplexer 109, wherein, transmitting terminal multiplexer 109 can use wavelength division multiplexer or time-division to answer
With device, the arm length difference of four roads Waveguide interference ring 106 is different, and its phase difference is respectively 0, pi/2, π, 3 pi/2s, the signal laser
Device 102 is sequentially connected intensity modulator 104,1*4 roads photoswitch 105, and 1*4 roads photoswitch 105 connects four tunnel waveguides respectively
Interference ring 106, the output end of the four roads Waveguide interference ring 106 are all connected with the first adjustable attenuator 107, wherein, four tunnel waveguides
Depolarizer 110 is connected between the adjustable attenuator 107 of interference ring 106 and first, the depolarizer 110 is used to change polarised light
For non-polarized light, to ensure the security of signal optical transmission process, first adjustable attenuator 107 connects transmitting terminal multiplexer
109, the synchronous laser 103 is sequentially connected the second adjustable attenuator 108 and transmitting terminal multiplexer 109, and described first can
Controlled attenuator 107 is connected same one end of transmitting terminal multiplexer 109, the transmitting terminal driving plate 101 with the second adjustable attenuator 108
Signal laser 102, intensity modulator 104,1*4 roads photoswitch 105, Waveguide interference ring 106, synchronous laser are connected respectively
103rd, the first adjustable attenuator 107 and the second adjustable attenuator 108；
The receiving terminal 200 includes receiving terminal driving plate 201, receiving terminal multiplexer 202, synchroprobe 203, polarization point
Beam device 204, two-way Waveguide interference ring 106 and single-photon detector 205, wherein, receiving terminal multiplexer 202 can use solution wavelength-division
Multiplexer or solution adaptive multiplexer, the receiving terminal multiplexer 202 connect transmitting terminal multiplexer 109 by quantum channel 300,
The other end of the receiving terminal multiplexer 202 connects synchroprobe 203 and polarization beam apparatus 204, the polarization beam splitting respectively
Device 204 connects two-way Waveguide interference ring 106 respectively successively, wherein, two-way Waveguide interference ring 106 is respectively connected with two-way single-photon detecting
Device 205 is surveyed, the receiving terminal driving plate 201 connects synchroprobe 203, Waveguide interference ring 106 and single photon detection respectively
Device 205.
As shown in Fig. 2 the Waveguide interference ring 106 includes front end coupler 1061, long-armed Wave guide unit, galianconism waveguide list
Member and rear end coupler 1062, the output end of the front end coupler 1061 connect long-armed Wave guide unit and galianconism ripple respectively
Unit is led, the output end of the long-armed Wave guide unit and galianconism Wave guide unit connects rear end coupler 1062, the length respectively
Arm Wave guide unit includes the first coupler 1063, the delay coupler 1065 of waveguide 1064 and second, first coupler
1063 connect the output end of front end coupler 1061 by silicon waveguide 1066, and first coupler 1063 passes through the waveguide that is delayed
1064 the second couplers 1065 of connection, second coupler 1065 connect the defeated of rear end coupler 1062 by silicon waveguide 1066
Enter end, the galianconism Wave guide unit connects the output end and rear end coupler of front end coupler 1061 using silicon waveguide 1064
1062 input, phase-modulator 1067 is provided with the long-armed Wave guide unit and/or galianconism Wave guide unit.
The phase-modulator 1067 makes PN junction using the plasma dispersion effect principle of silicon in silicon waveguide 1066
Structure, the cross section structure of its silicon waveguide 1066 is ridged, and the doped structure of its PN junction includes but is not limited to for PIN-type, reverse PN
Type, MOS structure type.The Carrier Profile for changing PN junction is driven by external voltage, and then changes the refraction of doped region silicon waveguide
Rate reaches the purpose for changing AMZI (unequal arm interferometer) two-arm phase difference.The response speed of phase-modulator 1067 is subnanosecond
Level, it is possible to achieve the high speed adjustment of phase.
The delay waveguide 1064 is the waveguide of low-loss silicon, silica waveguide, SiON waveguides, Si3N4Waveguide and polymer
One kind or combination in waveguide.The function of described delay waveguide 1064 is to provide the delay of light, and it is adopted as low-loss
Waveguide, the loss of unit length are significantly lower than ordinary silicon waveguide.For example, the loss of ordinary silicon waveguide is 2-3dB/cm, and it is sharp
The loss of the delay waveguide 1064 made of silica material only has 0.02dB/cm, and loss is about the 1/100 of ordinary silicon waveguide.
The material of delay waveguide 1064 includes silicon, silica, SiON, Si3N4, polymer (Polymer) etc..Made using silicon materials
Delay waveguide 1064 is, it is necessary to silicon waveguide be handled by special process such as hydrogen annealing or thermal oxides, the side of reduction silicon waveguide
Wall roughness, to improve the loss of waveguide.Using silica, SiON, Si3N4The delay waveguide 1064 that material makes, it is necessary first to
Material is deposited on silicon base chip using chemical vapour deposition technique (such as PECVD or LPCVD), recycles ultraviolet photolithographic technique
The mask pattern of delay waveguide 1064 is formed, finally using ICP (inductively coupled plasma etching) etching technics by mask pattern
It is transferred on the material of deposition and forms delay waveguide 1064.When making delay waveguide 1064 using polymer, generally requiring will be poly-
Compound material is uniformly spin-coated on silicon base chip by whirl coating technique, recycles the technique such as photoetching process or nano impression to be formed
The delay waveguide 1064 of polymeric material.The structure of delay waveguide includes bar shaped, ridged, circle, platypelloid type etc..
In another embodiment, the 3rd adjustable attenuator 1068 is provided with the galianconism Wave guide unit, it is described adjustable to decline
Subtract device 1068 can by by the attenuated optical signal in galianconism to it is long-armed in it is consistent, can reduce to the low-loss of waveguide 1064 that is delayed
Requirement.
The first described coupler 1063 provides optical coupled, the second coupler of silicon waveguide 1066 and delay waveguide 1064
1065 provide delay waveguides 1064 and silicon waveguide 1066 it is optical coupled.The knot of first coupler 1063 and the second coupler 1065
Structure includes adiabatic waveguide coupled structure, back taper coupled structure, evanescent wave coupled structure.
The signal laser 102 and synchronous laser 106 are same multiplexed laser, and the multiplexed laser can use
Time-multiplexed mode transmission signal light and synchronizable optical, the transmitting terminal multiplexer 109 are adaptive multiplexer, and the receiving terminal is answered
It is solution adaptive multiplexer with device 202.
The utility model additionally provides a kind of quantum key distribution method based on photoswitch control, comprises the following steps：
1) laser triggers：Transmitting terminal utilizes same clock signal difference trigger signal laser and synchronous laser hair
Project flashlight and synchronizable optical, the flashlight as modulation light, the synchronizable optical as synchronous transmission of signal to receiving terminal by
Synchroprobe response is used in receiving terminal；
2) state modulation is inveigled：The flashlight of signal laser transmitting carries out random strength modulation by intensity modulator, adjusts
It is made for signal state, inveigles state or vacuum state；
3) transmitting terminal is interfered：Flashlight is divided into by Si Lulu by 1*4 roads photoswitch, is connected respectively to complete by waveguide fabrication
The different Waveguide interference ring of the tunnel arm length differences of Cheng tetra-, the phase difference between each Waveguide interference ring are followed successively by 0, pi/2, π, 3 pi/2s, and
Select different paths to carry out break-make selection by 1*4 roads photoswitch, complete the selection of transmitting terminal out of phase modulation；
4) automatically controlled adjustable attenuator is decayed to flashlight：The flashlight that phase-modulation is completed by depolarizer is disappeared
Partially, light pulse is decayed to single photon magnitude by the flashlight after depolarized by the first adjustable attenuator, and synchronizable optical can by second
Controlled attenuator adjusts synchronizable optical the strength range that can be responded to receiving terminal；
5) flashlight and synchronizable optical throughput subchannel transmission：Flashlight passes through quantum with synchronizable optical after transmitting terminal is compound
Transmission decomposes again to receiving terminal, and in receiving terminal, and flashlight enters polarization beam apparatus, and synchronizable optical passes through synchronous optical detection
Device detects；
6) polarization beam apparatus beam splitting：The light of asynchronous polarization is decomposed into horizontal polarization direction by polarization beam apparatus and hung down
Straight polarization direction；
7) receiving terminal is interfered：The flashlight of horizontal polarization direction and vertical polarization is respectively connected to two brachiums of two-way
The different Waveguide interference ring of difference carries out phase-modulation, and phase difference is respectively 0, pi/2, completes the selection of receiving terminal out of phase；
8) single-photon detector detects：Single-photon detector detects optical signals, and safe key is produced for subsequent treatment.
In the step 5), wavelength-division multiplex or time-multiplexed side are used transmitting terminal is compound to flashlight and synchronizable optical
Formula is carried out, and wavelength-division multiplex or solution time division multiplexing mode progress are solved in corresponding use of receiving terminal decomposition.
If the mode of the step 5) flashlight and synchronizable optical multiplexing of transmission uses time division multiplexing, the signal laser
Any one laser timesharing can be used to send flashlight and synchronizable optical with synchronous laser, drive single laser in systems
Using time-multiplexed mode transmission signal light and synchronizable optical, the numerous and diverse degree and production cost of system are effectively reduced.
Comprehensive system architecture of the present utility model understands that the utility model has the advantages that with principle：
(1) quantum key dispatching system of the present utility model, by increasing a polarization beam apparatus in receiving terminal, by signal
Light is decomposed into two vertical polarization states, completes the interference under respective polarization state using polarization maintaining optical fibre interference ring, obtains preferably
Result of interference, avoiding birefringence effect in optical fiber transmitting procedure influences influence of the polarization state to result of interference, abandons simultaneously
Deviation-rectifying system, simplifies the lengthy and jumbled degree of system, also reduces production cost；
(2) the utility model only adjusts a phase by an interference ring, to used DAC and analogue amplifier
It is required that there was only 10 minus six powers magnitudes of existing way, the requirement of system design is greatly reduced.Wherein in existing way, sending out
Penetrate end and four phases are adjusted using an interference ring, it is necessary to which high-speed DAC turns to modulation voltage during this regulation again
Change, it is necessary to which High speed analog amplifier is amplified the size to required by interference ring to modulation voltage after conversion；In addition, this practicality
It is new that the break-make of different waveguide interference ring phase-modulation is selected using photoswitch, abandon the polarization-maintaining beam splitter of interference ring front end
And the use of rear end intensity modulator, control photoswitch to select the break-make of each phase using high-speed digital signal, reduce
The complexity of cost and system；
(3) the utility model uses the interference ring made by planar optical waveguide, because planar optical waveguide has polarization unwise
Perception so that system is without extra polarization compensation means, and traditional fiber interferometer is manually to manufacture mostly in addition, and precision is about
Tens micron dimensions, its manufacturing process is complex, and the manufacture craft of waveguide is extremely ripe, can reach sub-micrometer scale,
The key of system is preferably improved into code check.
Claims (3)
- A kind of 1. quantum key dispatching system based on photoswitch control, it is characterised in that：Including what is connected by quantum channel Transmitting terminal and receiving terminal, the transmitting terminal include transmitting terminal driving plate, signal laser, synchronous laser, intensity modulator, 1* 4 road photoswitches, four road Waveguide interference rings, the first adjustable attenuator, the second adjustable attenuator and transmitting terminal multiplexer, described four Road Waveguide interference ring arm length difference is different, and its phase difference is respectively 0, pi/2, π, 3 pi/2s, and the signal laser is sequentially connected intensity Modulator, 1*4 roads photoswitch, 1*4 roads photoswitch connect four road Waveguide interference rings respectively, the four roads Waveguide interference ring Output end is all connected with the first adjustable attenuator, and first adjustable attenuator connects transmitting terminal multiplexer, the synchronous laser The second adjustable attenuator and transmitting terminal multiplexer are sequentially connected, first adjustable attenuator is connected with the second adjustable attenuator Same one end of transmitting terminal multiplexer, the transmitting terminal driving plate connect signal laser, intensity modulator, 1*4 roads light and opened respectively Pass, Waveguide interference ring, synchronous laser, the first adjustable attenuator and the second adjustable attenuator；The receiving terminal is done including receiving terminal driving plate, receiving terminal multiplexer, synchroprobe, polarization beam apparatus, two-way waveguide Ring and single-photon detector are related to, the receiving terminal multiplexer connects transmitting terminal multiplexer, the receiving terminal by quantum channel The other end of multiplexer connects synchroprobe and polarization beam apparatus respectively, and the polarization beam apparatus connects two-way ripple respectively successively Interference ring is led, wherein, two-way Waveguide interference ring is respectively connected with two-way single-photon detector, and the receiving terminal driving plate connects respectively Synchroprobe, Waveguide interference ring and single-photon detector.
- 2. the quantum key dispatching system as claimed in claim 1 based on photoswitch control, it is characterised in that the waveguide is done Relating to ring includes front end coupler, long-armed Wave guide unit, galianconism Wave guide unit and rear end coupler, the front end coupler it is defeated Go out end and connect long-armed Wave guide unit and galianconism Wave guide unit respectively, the long-armed Wave guide unit and galianconism Wave guide unit it is defeated Going out end and connect rear end coupler respectively, the long-armed Wave guide unit includes the first coupler, delay waveguide and the second coupler, First coupler connects the output end of front end coupler by silicon waveguide, and first coupler is connected by the waveguide that is delayed Second coupler, second coupler connect the input of rear end coupler by silicon waveguide, and the galianconism Wave guide unit is adopted With the output end of silicon waveguide connection front end coupler and the input of rear end coupler, the long-armed Wave guide unit and/or short Phase-modulator is provided with arm Wave guide unit.
- 3. the quantum key dispatching system as claimed in claim 2 based on photoswitch control, it is characterised in that the signal swashs Light device and synchronous laser are same multiplexed laser, and the multiplexed laser can use time-multiplexed mode transmission signal light With synchronizable optical, the transmitting terminal multiplexer is adaptive multiplexer, and the receiving terminal multiplexer is solution adaptive multiplexer.
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| CN201720929691.2U CN207150610U (en) | 2017-07-28 | 2017-07-28 | A kind of quantum key dispatching system based on photoswitch control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276757A (en) * | 2017-07-28 | 2017-10-20 | 浙江九州量子信息技术股份有限公司 | A kind of quantum key dispatching system controlled based on photoswitch and method |
| CN110190953A (en) * | 2019-05-14 | 2019-08-30 | 中国科学院半导体研究所 | A kind of on piece encoder |
-
2017
- 2017-07-28 CN CN201720929691.2U patent/CN207150610U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276757A (en) * | 2017-07-28 | 2017-10-20 | 浙江九州量子信息技术股份有限公司 | A kind of quantum key dispatching system controlled based on photoswitch and method |
| CN110190953A (en) * | 2019-05-14 | 2019-08-30 | 中国科学院半导体研究所 | A kind of on piece encoder |
| CN110190953B (en) * | 2019-05-14 | 2020-11-10 | 中国科学院半导体研究所 | On-chip encoder |
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