CN207706189U - Quantum light and the total fine transmitting device of classical light - Google Patents
Quantum light and the total fine transmitting device of classical light Download PDFInfo
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- CN207706189U CN207706189U CN201721136463.6U CN201721136463U CN207706189U CN 207706189 U CN207706189 U CN 207706189U CN 201721136463 U CN201721136463 U CN 201721136463U CN 207706189 U CN207706189 U CN 207706189U
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Abstract
The utility model discloses a kind of quantum light and the total fine transmitting device of classical light, including the first classical optical communication equipment, first quantum cryptography communication equipment, notch filter, first wavelength division multiplexer, second wavelength division multiplexer, second classical optical communication equipment, second quantum cryptography communication equipment and narrow band filter, first classical optical communication equipment is connect with notch filter, first quantum cryptography communication equipment and notch filter are connect with the first wavelength division multiplexer, first wavelength division multiplexer is connect by fiber channel with the second wavelength division multiplexer, second wavelength division multiplexer is connect with the second classical optical communication equipment and narrow band filter respectively, narrow band filter is connect with the second quantum cryptography communication equipment；The utility model is realized the fine transmission altogether of classical optical communication equipment and quantum cryptography communication equipment, is solved high cost caused by due to being laid with special quantum channel optical fiber, is simplified quantum cryptography networks deployment, while effectively eliminating interference of the classical light to quantum light.
Description
Technical field
The utility model is related to quantum key distribution technology fields, and in particular to a kind of quantum light and the fine transmission altogether of classical light
Device.
Background technology
As quantum key distribution technology reaches its maturity, there are still some to ask for the scheme based on fiber quantum key distribution
Topic can not be with existing classical optical communication equipment if building for quantum key distribution network needs to be laid with dedicated quantum channel
Wavelength-division multiplex is carried out, main reason is that the light intensity of classical optical communication equipment is too strong, it is too big to the interference of quantum light, cause quantum close
Key distributing equipment is unable to operate normally.
Utility model content
Technical problem to be solved in the utility model be provide in view of the above shortcomings of the prior art a kind of quantum light with
Fine transmitting device, this quantum light reform existing quantum cryptography communication solution to classical light with the total fine transmitting device of classical light altogether,
It realizes the fine transmission altogether of classical optical communication equipment and quantum cryptography communication equipment, overcomes interference of the classical light to quantum light, solve
It has determined due to high cost caused by laying special quantum channel optical fiber, has simplified quantum cryptography networks deployment.
To realize the above-mentioned technical purpose, the technical solution that the utility model is taken is：
A kind of quantum light and the total fine transmitting device of classical light, including the first classical optical communication equipment, the first quantum cryptography are led to
Believe that equipment, notch filter, the first wavelength division multiplexer, the second wavelength division multiplexer, the second classical optical communication equipment, the second quantum are close
Code communication equipment and narrow band filter, the described first classical optical communication equipment are connect with notch filter, and first quantum is close
Code communication equipment and notch filter are connect with the first wavelength division multiplexer, first wavelength division multiplexer by fiber channel with
Second wavelength division multiplexer connects, and second wavelength division multiplexer connects with the second classical optical communication equipment and narrow band filter respectively
It connects, the narrow band filter is connect with the second quantum cryptography communication equipment.
Further include first wave length converter and second wave length conversion as the further improved technical solution of the utility model
Device, the described first classical optical communication equipment are connect by first wave length converter with notch filter, second wavelength-division multiplex
Device is connect by second wave length converter with the second classical optical communication equipment.
As the further improved technical solution of the utility model, the described first classical optical communication equipment and the second classical light
Communication equipment is all made of SDH optical transmission devices.
As the further improved technical solution of the utility model, the described first classical optical communication equipment and the second classical light
Communication equipment is all made of PTN Packet Transport Network equipment.
As the further improved technical solution of the utility model, the described first classical optical communication equipment and the second classical light
Communication equipment is all made of OTN OTN apparatus.
As the further improved technical solution of the utility model, the first quantum cryptography communication equipment and the second quantum
Cryptographic Communications Equipment is all made of quantum-key distribution terminal.
The utility model has the advantages that compared with prior art：
（1）Wavelength conversion technology is added under the premise of not changing existing classical optical communication equipment in the utility model（Wavelength
Converter）, realize that quantum cryptography communication equipment and the total fibre of classical optical communication equipment are not interfere with each other using transmission；
（2）The utility model passes through narrow-band filtering technology（Narrow band filter）Remove interference of the channel to quantum light；
（3）The utility model increases notch filter before classical light enters the first wavelength division multiplexer（Wavelength and quantum light
Identical, bandwidth is wider than quantum light）, to filter out crosstalk of the classical trimmed book bottom to quantum light；
（4）The utility model increases notch filter after first wave length converter（Wavelength is identical as quantum light, band
It is wide in quantum light）, to filter out crosstalk of the classical trimmed book bottom to quantum light；
（5）The utility model reforms existing quantum cryptography communication solution, may be implemented by classical optical communication equipment with
The fine transmission altogether of quantum cryptography communication equipment, solves high cost caused by due to being laid with special quantum channel optical fiber, the amount of simplifying
Sub- password network deployment, while effectively eliminating interference of the classical light to quantum light.
Description of the drawings
Fig. 1 is the structural schematic diagram of traditional wavelength-division.
Fig. 2 is the structural schematic diagram of the utility model.
Fig. 3 is the preferred structural schematic diagram of the utility model.
Fig. 4 is that the utility model is applied to the structural schematic diagram on SDH optical transmission devices.
Specific implementation mode
Specific embodiment of the utility model is made below according to Fig. 1 to Fig. 4 and being illustrated:
Referring to Fig. 1, it is generally the case that realize that quantum light can be as shown in Figure 1 with classical optical wavelength division multiplexing mode：Quantum light
From the different wavelength of classical gloss, it is multiplexed into an optical fiber by wave multiplexer and channel-splitting filter.Due to quantum just single photon
Transmission, classical optical communication equipment signal reception power in -20dBm or so, the transmission power of quantum cryptography communication equipment -
The proportionate relationship of 90dBm or so, theoretical classics light and quantum optical signal power is 10000000:1, and this numerical value under actual environment
By bigger.
Common wavelength division component has CWDM and DWDM, and the wavelength interval of CWDM systems is 20nm, and wave-length coverage is
1471nm~1611nm；Dwdm system wavelength interval is 0.8nm, and wave-length coverage is 1560.61nm~1529.55nm.In general,
In order to increase transmission range, quantum light and classical light can all select C-band to be transmitted.And the isolation of this wave band device is big
Mostly in 40dB or so, classical optical signal can not be made on quantum optical signal without influence.Stronger classics light is easy to the amount of being crosstalked into
On sub-light wavelength, quantum light is caused greatly to interfere, quantum-key distribution equipment is caused to be unable to operate normally.
In order to solve the above-mentioned technical problem, the utility model devises the scheme such as Fig. 2：
Referring to Fig. 2, a kind of quantum light and classical light fine transmitting device, including the first classical optical communication equipment, the first amount altogether
Sub- Cryptographic Communications Equipment, notch filter, the first wavelength division multiplexer, the second wavelength division multiplexer, the second classical optical communication equipment, the
Two quantum cryptography communication equipment and narrow band filter, the first classical optical communication equipment are connect with notch filter, and described the
One quantum cryptography communication equipment and notch filter are connect with the first wavelength division multiplexer, and first wavelength division multiplexer passes through light
Fine channel is connect with the second wavelength division multiplexer, and second wavelength division multiplexer is filtered with the second classical optical communication equipment and narrowband respectively
Wave device connects, and the narrow band filter is connect with the second quantum cryptography communication equipment.
In scheme shown in Fig. 2, the first classical optical communication equipment selects different work from the first quantum cryptography communication equipment
Wavelength increases a notch filter, it is therefore an objective to by the background with quantum light co-wavelength in classical communication light in classical optical channel
Light filters, and classical optical communications wavelength does not change, cleaner to ensure to receiving terminal to filter.Simultaneously in the second quantum cryptography
Narrow band filter is placed on receiving terminal channel where communication equipment to be filtered light, removes spuious and back wave, the amount of filtering
The line-hit of sub-light.
Further include first wave length converter and second wave length converter in the present embodiment, described first is classical referring to Fig. 3
Optical communication equipment is connect by first wave length converter with notch filter, and second wavelength division multiplexer is turned by second wave length
Parallel operation is connect with the second classical optical communication equipment.
In Fig. 3 schemes, increases wavelength convert function on the basis of Fig. 2, add first wave length converter and second
Wavelength shifter.Since the first wavelength division multiplexer and the second wavelength division multiplexer are related to the isolation of wavelength and the interval of wavelength,
Interval between wavelength is bigger, and isolation is also bigger.In order to not influence the normal use of existing classical light device, reduces equipment and replace
Input is changed, so the interval between classical light and quantum light is increased to the wave band being independent of each other, the wavelength of classical light is passed through
First wave length converter is transformed into the prodigious wavelength in quantum light interval up, such as 1550 nm wavelength of quantum light C-band,
1310 nm of classical light S-band or 1625 nm wavelength of L-band.The receiving terminal of second classical optical communication equipment is again by the
Two wavelength shifters go back the conversion of classical light.Simultaneously narrow band filter the second quantum cryptography communication equipment receiving terminal to light
It is filtered, removes spuious and back wave, filter the line-hit of quantum light.
The utility model can be effectively by quantum cryptography communication equipment (the first quantum cryptography communication equipment and the second quantum
Cryptographic Communications Equipment) and classical optical communication equipment（First classical optical communication equipment and the second classical optical communication equipment）It carries out simultaneous
Hold, under the premise of not changing classical optical communication network equipment, by quantum cryptography communication equipment (the first quantum cryptography communication equipment
With the second quantum cryptography communication equipment) it is merged with classical optical communication equipment, wherein the first classical optical communication equipment and the
Two classical optical communication equipments can be the equipment such as SDH optical transmission devices, PTN Packet Transport Network equipment or OTN OTN apparatus.
Quantum-key distribution in the prior art may be used in wherein the first quantum cryptography communication equipment and the second quantum cryptography communication equipment
Terminal or girz quantum-key distribution terminal.
It is described by taking SDH optical transmission devices as an example below：
Referring to Fig. 4, Fig. 4 carries out wavelength convert by taking SDH optical transmission devices as an example, to classical light device.We pass SDH light
The 1550nm wavelength that transfer device is sent out is converted into ITU-CWDM wavelength by first wave length converter, using wavelength 1310nm, with
By allusion quotation light by notch filter by classical communication light with quantum light co-wavelength（Wavelength 1549.32nm）Bias light filter
Fall.Quantum cryptography communication equipment transmitting terminal（First quantum cryptography communication equipment）, using wavelength 1549.32nm, pass through first wave
Classical light and the convergence of quantum light are carried out wave division multiplex transmission by division multiplexer.Receiving terminal carries out wavelength by the second wavelength division multiplexer
After separation, 1310nm wavelength, which enters after second wave length converter is converted to 1550nm, is sent into SDH optical transmission devices, another part amount
Sub-light filters out interference light by narrow band filter and is sent into quantum cryptography communication equipment receiving terminal（Second quantum cryptography communication is set
It is standby）.Crosstalk and nonlinear noise have obtained effective inhibition by wavelength convert and narrow-band filtering in the utility model, solve
Quantum cryptography communication equipment is interfered by classical light.The working method of PTN Packet Transport Network equipment and OTN OTN apparatus
With it is above-listed identical.
Referring to Fig. 3, the transmission method of the quantum light of the present embodiment and the total fine transmitting device of classical light specifically includes following step
Suddenly：
Step 1：It is λ that the classical optical communication equipment of the first of transmitting terminal, which sends out wavelength,1Classical light and by wavelength be λ1Classics
Optical transport is to first wave length converter；
Step 2：Wavelength is λ by first wave length converter1Classical light be converted to wavelength be λ2Classical light and by wavelength be
λ2Classical optical transport to notch filter；
Step 3：It is λ that notch filter, which filters wavelength,2Classical light in the first quantum cryptography communication equipment with transmitting terminal
The wavelength sent out is λ3Quantum light co-wavelength bias light；
Step 4：The wavelength that notch filter transmits out is λ2Classical light and the first quantum cryptography communication equipment send out
Wavelength be λ3Quantum light together enter the first wavelength division multiplexer；
Step 5：Wavelength is λ by the first wavelength division multiplexer2Classical light and wavelength be λ3Quantum recovery use an optical fiber
In and be transferred to the second wavelength division multiplexer of receiving terminal；
Step 6：Wavelength is λ by the second wavelength division multiplexer2Classical light and wavelength be λ3Quantum light detached, second
Wavelength is λ by wavelength division multiplexer3Quantum optical transport to narrow band filter, wavelength is λ by the second wavelength division multiplexer2Classical light
It is transferred to second wave length converter；
Step 7：Wavelength is λ by second wave length converter2Classical light be converted to wavelength be λ1Classical light and by wavelength be
λ1Classical optical transport to the second classical optical communication equipment；
Step 8：Narrow band filter filters the spuious and back wave of quantum light and by quantum optical transport to the second quantum cryptography
Communication equipment.
In conclusion under the premise of not changing existing classical optical communication equipment, wavelength convert skill is added in the utility model
Art realizes that quantum cryptography communication equipment and the total fibre of classical optical communication equipment are not interfere with each other using transmission；Pass through narrow-band filtering
Technology removes interference of the channel to quantum light；In conventional wavelength division multiplex scheme, before classical light enters splicer, increase notch filter
Device（Wavelength is identical as quantum, and bandwidth is wider than quantum light）, to filter out crosstalk of the classical trimmed book bottom to quantum light.It is filled in wavelength conversion
It postpones, increases notch filter（Wavelength is identical as quantum, and bandwidth is wider than quantum light）, to filter out classical trimmed book bottom to quantum light
Crosstalk.
The scope of protection of the utility model includes but not limited to embodiment of above, and the scope of protection of the utility model is to weigh
Subject to sharp claim, any replacement being readily apparent that those skilled in the art that this technology is made, deformation, improvement are each fallen within
The scope of protection of the utility model.
Claims (6)
1. a kind of quantum light and the total fine transmitting device of classical light, it is characterised in that：Including the first classical optical communication equipment, the first amount
Sub- Cryptographic Communications Equipment, notch filter, the first wavelength division multiplexer, the second wavelength division multiplexer, the second classical optical communication equipment, the
Two quantum cryptography communication equipment and narrow band filter, the first classical optical communication equipment are connect with notch filter, and described the
One quantum cryptography communication equipment and notch filter are connect with the first wavelength division multiplexer, and first wavelength division multiplexer passes through light
Fine channel is connect with the second wavelength division multiplexer, and second wavelength division multiplexer is filtered with the second classical optical communication equipment and narrowband respectively
Wave device connects, and the narrow band filter is connect with the second quantum cryptography communication equipment.
2. quantum light according to claim 1 and the total fine transmitting device of classical light, it is characterised in that：It further include first wave length
Converter and second wave length converter, the described first classical optical communication equipment are connected by first wave length converter and notch filter
It connects, second wavelength division multiplexer is connect by second wave length converter with the second classical optical communication equipment.
3. quantum light according to claim 1 or 2 and the total fine transmitting device of classical light, it is characterised in that：First warp
Allusion quotation optical communication equipment and the second classical optical communication equipment are all made of SDH optical transmission devices.
4. quantum light according to claim 1 or 2 and the total fine transmitting device of classical light, it is characterised in that：First warp
Allusion quotation optical communication equipment and the second classical optical communication equipment are all made of PTN Packet Transport Network equipment.
5. quantum light according to claim 1 or 2 and the total fine transmitting device of classical light, it is characterised in that：First warp
Allusion quotation optical communication equipment and the second classical optical communication equipment are all made of OTN OTN apparatus.
6. quantum light according to claim 1 or 2 and the total fine transmitting device of classical light, it is characterised in that：First amount
Sub- Cryptographic Communications Equipment and the second quantum cryptography communication equipment are all made of quantum-key distribution terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721136463.6U CN207706189U (en) | 2017-09-06 | 2017-09-06 | Quantum light and the total fine transmitting device of classical light |
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| CN201721136463.6U CN207706189U (en) | 2017-09-06 | 2017-09-06 | Quantum light and the total fine transmitting device of classical light |
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| CN207706189U true CN207706189U (en) | 2018-08-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528639A (en) * | 2017-09-06 | 2017-12-29 | 安徽问天量子科技股份有限公司 | Quantum light and classical light common fine transmitting device and its transmission method |
| CN111490825A (en) * | 2020-05-15 | 2020-08-04 | 暨南大学 | Method for transmitting data and simultaneously distributing quantum keys based on anti-resonance hollow-core optical fiber |
-
2017
- 2017-09-06 CN CN201721136463.6U patent/CN207706189U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107528639A (en) * | 2017-09-06 | 2017-12-29 | 安徽问天量子科技股份有限公司 | Quantum light and classical light common fine transmitting device and its transmission method |
| CN107528639B (en) * | 2017-09-06 | 2022-09-16 | 安徽问天量子科技股份有限公司 | Quantum light and classical light common fiber transmission device and transmission method thereof |
| CN111490825A (en) * | 2020-05-15 | 2020-08-04 | 暨南大学 | Method for transmitting data and simultaneously distributing quantum keys based on anti-resonance hollow-core optical fiber |
| CN111490825B (en) * | 2020-05-15 | 2021-06-08 | 暨南大学 | Method for transmitting data and simultaneously distributing quantum keys based on anti-resonance hollow-core optical fiber |
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