CN209356770U - Polarize unrelated phasing device - Google Patents
Polarize unrelated phasing device Download PDFInfo
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- CN209356770U CN209356770U CN201920301108.2U CN201920301108U CN209356770U CN 209356770 U CN209356770 U CN 209356770U CN 201920301108 U CN201920301108 U CN 201920301108U CN 209356770 U CN209356770 U CN 209356770U
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Abstract
There is provided a kind of polarization unrelated phasing device, comprising: polarization beam apparatus, phase-modulator and reflection unit；Wherein polarization beam apparatus has the first, second, third and fourth port, first port is for receiving light wave all the way, second and the 4th port by first transmission optical path optical coupling, third port is coupled to reflection unit by the second transmission optical path, and polarization beam apparatus is configured for for light wave being all the way split and/or two-way light wave is closed beam as light wave all the way；Phase-modulator is arranged in the first transmission optical path and for carrying out phase-modulation to the light wave through its transmission；Reflection unit includes quarter-wave plate and reflecting mirror, reflecting mirror is integrally formed in quarter-wave plate rear end with quarter-wave plate, the light wave reflection that reflection unit is configured for transmit returns polarization beam apparatus, and light wave is made polarized orthogonal rotary reflection in reflection.The unrelated phasing device of the polarization of the utility model has the advantages of simple structure and easy realization.
Description
Technical field
The utility model relates to optical transport field of communication technology more particularly to a kind of unrelated phasing devices of polarization.
Background technique
Quantum Secure Communication is the forward position focus field that quantum physics are combined with information science.Based on quantum key
Distribution technology and one time cryptosystem principle, quantum secret communication can be in the safety of overt channel realization information.Quantum key point
Hair, can be safe between users based on physical principles such as quantum mechanics Heisenberg uncertainty relationship, quantum non-clone principles
Ground shared key, and can detecte potential eavesdropping behavior, can be applied to the high safeties such as national defence, government affairs, finance, electric power needs
The field asked.
One important link of quantum key distribution is the coding and decoding to light quantity subsignal.Currently, ground quantum is close
Key distribution is based primarily upon fibre channel transmission, is the major way of fiber channel quantum key distribution using phase code and decoding
One of, it can be realized high speed, the light quantum Signal coding of low pressure and decoding using Waveguide Phase Modulator.Existing commercialization waveguide phase
Position modulator majority is that polarization is relevant, as single polarization waveguide phase-modulator only to a polarization direction carry out phase-modulation,
Birefringent waveguide phase-modulator all carries out phase-modulation to two polarization directions but modulation efficiency is different, effectively realizes polarization
Unrelated phase-modulation is in quantum communications and the hot and difficult issue of Fibre Optical Sensor and fiber optic communication field.
Utility model content
The main purpose of the utility model is that propose a kind of unrelated phasing device of polarization, by will light wave all the way
Polarization beam splitting is the mutually orthogonal two-way light wave of polarization state, the wherein polarization state and phase of light wave all the way after selecting polarization beam splitting
The polarization direction of modulator is consistent, passes through reflection unit to it before the another way light wave input phase modulator after polarization beam splitting
Polarization state carries out polarized orthogonal rotation, so that the light wave of two orthogonal polarisation states all passes through phase-modulation with the same polarization direction
Device carries out identical phase-modulation to two orthogonal polarisation state light waves, to realize the unrelated phase-modulation of polarization.
The utility model provides at least following technical scheme:
1. a kind of unrelated phasing device of polarization characterized by comprising polarization beam apparatus, phase-modulator and anti-
Injection device；Wherein,
The polarization beam apparatus has first port, second port, third port and the 4th port, the polarization beam apparatus
First port input light wave all the way for receiving, the second port of the polarization beam apparatus and the 4th port pass through the first transmission
The third port of optical path optical coupling, the polarization beam apparatus is coupled to the reflection unit by the second transmission optical path, wherein institute
It states polarization beam apparatus to be configured for the input light wavelength-division beam being the mutually orthogonal two-way light wave of polarization state, and/or is used for
The mutually orthogonal two-way light wave of polarization state is closed into beam as light wave all the way；
The phase-modulator is arranged in the first transmission optical path and is configured for the light transmitted through it
Wave carries out phase-modulation；
The reflection unit includes quarter-wave plate and reflecting mirror, and the reflecting mirror is in the quarter-wave plate rear end
It is integrally formed with the quarter-wave plate, the reflection unit is configured for the light for carrying out the polarizing beamsplitter
The polarization beam apparatus is returned in wave reflection, and the light wave that the polarizing beamsplitter comes is made polarized orthogonal rotation instead in reflection
It penetrates, so that the polarization conversion of the light wave is at orthogonal to that polarization state after the reflection via the reflection unit.
2. the unrelated phasing device of polarization according to scheme 1, which is characterized in that the first transmission optical path and/
Or the second transmission optical path is polarization maintaining optical fibre optical path；The slow axis of the polarization maintaining optical fibre of the second transmission optical path with described four/
The slow axis of one wave plate or the angle of fast axle are 45 degree.
3. according to scheme 1 polarize unrelated phasing device, which is characterized in that the reflection unit includes four points
One of wave plate and the reflecting mirror that is plated on the plane of crystal of the quarter-wave plate.
4. according to scheme 1 polarize unrelated phasing device, which is characterized in that the reflection unit includes speed
The reflecting mirror that axis transmits 90 degree of phase phase difference of polarization maintaining optical fibre and is plated on the end face of the polarization maintaining optical fibre.
5. the unrelated phasing device of the polarization according to any one of scheme 1 to 4, which is characterized in that the phase
Modulator is single polarization phase modulator.
6. the unrelated phasing device of the polarization according to any one of scheme 1 to 4, which is characterized in that the phase
Modulator is birefringent phase modulator.
7. the unrelated phasing device of the polarization according to any one of scheme 1 to 4, which is characterized in that the polarization
Unrelated phasing device further includes optical circulator, and the optical circulator is set positioned at the front end of the polarization beam apparatus, institute
Stating optical circulator includes first port, second port and third port, wherein the light of the first port input of the optical circulator
Wave is exported via the second port of the optical circulator to the polarization beam apparatus；The polarization beam apparatus is exported to the ring of light
The light wave of the second port of shape device is exported via the third port of the optical circulator.
Using the embodiment of the utility model, by by the polarization beam splitting of light wave all the way of random polarization state be polarization state mutually just
The two-way light wave of friendship, select polarization beam splitting after wherein the polarization state of light wave and the polarization direction of phase-modulator are consistent all the way,
Pass through reflection unit before another way light wave input phase modulator after polarization beam splitting and polarized orthogonal rotation is carried out to its polarization state
Turn, so that the light wave of two orthogonal polarisation states all passes through phase-modulator with the same polarization direction, to two orthogonal polarisation states
Light pulse carries out identical phase-modulation, to realize the unrelated phase-modulation of polarization.The unrelated phase tune of the polarization of the utility model
Apparatus structure processed is simple, is easily achieved.
Detailed description of the invention
Fig. 1 is the composed structure schematic diagram of the unrelated phasing device of polarization of the utility model one embodiment.
Fig. 2 is the work flow diagram of the unrelated phasing device of polarization of the utility model above-described embodiment.
Specific embodiment
Specifically describe the preferred embodiment of the utility model with reference to the accompanying drawing, wherein attached drawing constitutes the application one
Point, and be used to illustrate the principles of the present invention together with the embodiments of the present invention.For purpose of clarity and simplification, when it
When the theme of the utility model may be made smudgy, to the detailed specific of the known function and structure of device described herein
Illustrate to omit.
Fig. 1 is the composed structure schematic diagram of the unrelated phasing device of polarization of the utility model one embodiment.
As shown in Figure 1, the unrelated phasing device of the polarization includes consisting of part: polarization beam apparatus 102, reflection
Device 103 and phase-modulator 104.
Polarization beam apparatus 102 includes port A, port B, port C and port D, and port A, port B, port C and port D can
It is referred to as first port, second port, third port and the 4th port.The first port of polarization beam apparatus 102 is for receiving
Light wave, the second port of polarization beam apparatus 102 and the 4th port are inputted all the way passes through the first transmission optical path optical coupling, polarization beam splitting
The third port of device 102 is coupled to reflection unit 103 by the second transmission optical path, and wherein polarization beam apparatus 102 will be for will be described
Input light wavelength-division beam is the mutually orthogonal two-way light wave of polarization state, and/or for closing the mutually orthogonal two-way light wave of polarization state
Beam is light wave all the way.
Specifically, the first port 101 namely port A of polarization beam apparatus 102, to polarize unrelated phasing device
Input terminal and output end.The setting of phase-modulator 104 is in the first transmission optical path and is configured for through its transmission
Light wave carry out phase-modulation, that is, the setting of phase-modulator 104 is located at the port B and port D of connection polarization beam apparatus 102
In first transmission optical path.Specifically, the port B of polarization beam apparatus 102 is connected with the port E of 104 side of phase-modulator, polarization
The port D of beam splitter 102 is connected with the port F of 104 other side of phase-modulator.The port C of polarization beam apparatus 102 and reflection fill
103 are set to be connected.
Reflection unit 103 is that one kind can make polarized orthogonal rotary reflection, i.e. anti-to the polarization state of the light wave reflected
By the polarization conversion of the light wave at the reflection unit of orthogonal to that polarization state when the light wave penetrated.For example, it is assumed that
The polarization state of the light wave of input reflection device 103 is x-polarisation state, is converted after reflection unit 103 makees polarized orthogonal rotary reflection
At orthogonal to that polarization state, that is, y-polarisation state, or, it is assumed that the polarization state of the light wave of input reflection device 103 is y-polarisation state,
Orthogonal to that polarization state i.e. x-polarisation state is transformed into after reflection unit 103 makees polarized orthogonal rotary reflection.
In one embodiment, reflection unit 103 includes quarter-wave plate and reflecting mirror, and the reflecting mirror is described four
/ mono- wave plate rear end is integrally formed with the quarter-wave plate, and reflection unit 103 is configured for polarization beam apparatus
The light wave reflection that 102 transmission come returns polarization beam apparatus 102, and the light wave for carrying out the transmission of polarization beam apparatus 102 in reflection is inclined
Polarization state makees polarized orthogonal rotary reflection so that via reflection unit 103 reflect after the light wave polarization conversion Cheng Yuqi just
The polarization state of friendship.Preferably, the first transmission optical path and/or the second transmission optical path are polarization maintaining optical fibre optical path；Specifically,
The port D of transmission optical path, polarization beam apparatus 102 that the port B of polarization beam apparatus 102 is connect with the port E of phase-modulator 104
What the port C of the transmission optical path, polarization beam apparatus 102 that connect with the port F of phase-modulator 104 was connect with reflection unit 103
Transmission optical path is polarization maintaining optical fibre optical path；The slow axis of the polarization maintaining optical fibre of the second transmission optical path is slow with the quarter-wave plate
Axis or the angle of fast axle are 45 degree.
This reflection unit 103 including reflecting mirror and quarter-wave plate can also referred to as " quarter-wave plate be anti-
Penetrate mirror ", it can be realized by plating reflecting mirror in quarter-wave plate plane of crystal, it also can be by transmitting phase phase in fast and slow axis
Poor 90 degree of polarization maintaining optical fibre end face plating reflecting mirror is realized.Specifically, reflection unit 103 may include quarter-wave plate and plating
Reflecting mirror on the plane of crystal of the quarter-wave plate.Alternatively, reflection unit 103 includes that fast and slow axis transmits phase phase difference
90 degree of polarization maintaining optical fibre and the reflecting mirror being plated on the end face of the polarization maintaining optical fibre, in this example, the fast and slow axis transmission
The polarization maintaining optical fibre that 90 degree of phase phase difference is equivalent to quarter-wave plate.
Phase-modulator 104 can be single polarization phase modulator or birefringent phase modulator, wherein the list is inclined
Vibration phase-modulator is configured for applying phase-modulation, to another polarization state to a polarization state of the light wave being transferred through
Cut-off；The birefringent phase modulator is configured for applying two orthogonal polarisation states of the light wave being transferred through different
Adjustable phase-modulation.
Preferably, the unrelated phasing device of the polarization can also include optical circulator, and the optical circulator is set
Positioned at the front end of polarization beam apparatus 102, the optical circulator includes first port, second port and third port, wherein described
The light wave of the first port input of optical circulator is exported via the second port of the optical circulator to polarization beam apparatus 102；Partially
The beam splitter 102 that shakes is exported to the light wave of the second port of the optical circulator and is exported via the third port of the optical circulator.
Fig. 2 is the work flow diagram of the unrelated phasing device of polarization suitable for the utility model above-described embodiment,
In include:
Step S101: the input optical pulse all the way of random polarization state is mutual for two-way polarization state through polarization beam apparatus beam splitting
Orthogonal first via light pulse and the second tunnel light pulse.
Step S102: by reflecting after the phase modulated device of first via light pulse sequence, the polarization beam apparatus, reflection unit
Device is reflected back the polarization beam apparatus, and the second tunnel light pulse sequence is through reflection unit, the polarization beam apparatus, phase-modulator
After be transmitted to the polarization beam apparatus, the first via light pulse of the polarization beam apparatus is reflected back by reflection unit and through phase
It is light pulse all the way that the second tunnel light pulse that the polarization beam apparatus is transmitted to after the modulator of position, which closes beam by the polarization beam apparatus,
Output.
Step S103: the first via light pulse and the second tunnel light pulse respectively polarize when reflecting through the reflection unit
Orthogonal rotary reflection, so that respective polarization conversion is at orthogonal to that polarization state after reflection via the reflection unit.
Specifically, for the unrelated phasing device of polarization shown in FIG. 1, when work, input light wave is by port 101 through inclined
The port A input of vibration beam splitter 102, and be the mutually orthogonal first via light wave of polarization state by 102 polarization beam splitting of polarization beam apparatus
With the second road light wave.First via light wave is inputted by the port B output of polarization beam apparatus 102 and the port E of phase modulated device 104
Phase-modulator 104 is exported after carrying out phase-modulation by the port F of phase-modulator 104.From the port F of phase-modulator 104
The light wave of output by polarization beam apparatus 102 port D input polarization beam splitter 102, and it is defeated by the port C of polarization beam apparatus 102
Out to reflection unit 103.The first via light wave reflection for inputting it is returned polarization beam apparatus 102 and is divided by polarization by reflection unit 103
The port A of beam device 102 is exported.
Second road light wave is exported by the port C of polarization beam apparatus 102 to reflection unit 103, and reflection unit 103 will input it
The second road light wave reflection return polarization beam apparatus 102 and by the port D of polarization beam apparatus 102 export.From polarization beam apparatus 102
Port D output the phase modulated device 104 of the second road light wave port F input phase modulator 104 carry out phase-modulation after by
The port E of phase-modulator 104 is exported.The the second road light wave exported from the port E of phase-modulator 104 is by polarization beam apparatus
102 port B input polarization beam splitter 102 is simultaneously exported by the port A of polarization beam apparatus 102.
Each of first via light wave and the second road light wave through reflection unit 103 reflection retrodeviate polarization state be transformed to it is orthogonal to that
Polarization state.Phase-modulator 102 carries out identical phase-modulation to first via light wave and the second road light wave.Preferably, first
Road light wave is exported from the second port of polarization beam apparatus 102 to be divided to the time of phase-modulator 104 and the second tunnel pulse from polarization
The time that the third port output of beam device 102 is transmitted to phase-modulator 104 can be identical.
Herein, term " polarization beam apparatus " is also referred to as and as polarization beam combiner, and vice versa.
The unrelated phasing device of the polarization of the utility model both can be applied to quantum key distribution system, can also answer
For Fibre Optical Sensor and fiber optic communication field etc..
It should be able to be the technology hand reaching predetermined purpose and being taken to the utility model by the explanation of specific embodiment
Section and effect have more deeply and it is specific understand, however appended diagram is only to provide reference and description and is used, and is not used to pair
The utility model limits.
Claims (7)
1. a kind of polarize unrelated phasing device characterized by comprising polarization beam apparatus, phase-modulator and reflection dress
It sets；Wherein,
The polarization beam apparatus has first port, second port, third port and the 4th port, and the of the polarization beam apparatus
Single port inputs light wave for receiving all the way, and the second port of the polarization beam apparatus and the 4th port pass through the first transmission optical path
The third port of optical coupling, the polarization beam apparatus is coupled to the reflection unit by the second transmission optical path, wherein described inclined
Vibration beam splitter is configured for the input light wavelength-division beam being the mutually orthogonal two-way light wave of polarization state, and/or being used for will be inclined
The mutually orthogonal two-way light wave of polarization state closes beam as light wave all the way；
The phase-modulator, be arranged on it is described first transmission optical path on and be configured for through its transmission light wave into
Row phase-modulation；
The reflection unit includes quarter-wave plate and reflecting mirror, and the reflecting mirror is in the quarter-wave plate rear end and institute
It states quarter-wave plate to be integrally formed, it is anti-that the reflection unit is configured for the light wave for carrying out the polarizing beamsplitter
It is emitted back towards the polarization beam apparatus, and the light wave that the polarizing beamsplitter comes is made into polarized orthogonal rotary reflection in reflection,
So that the polarization conversion of the light wave is at orthogonal to that polarization state after reflection via the reflection unit.
2. the unrelated phasing device of polarization according to claim 1, which is characterized in that the first transmission optical path and/
Or the second transmission optical path is polarization maintaining optical fibre optical path；The slow axis of the polarization maintaining optical fibre of the second transmission optical path with described four/
The slow axis of one wave plate or the angle of fast axle are 45 degree.
3. according to claim 1 polarize unrelated phasing device, which is characterized in that the reflection unit includes four points
One of wave plate and the reflecting mirror that is plated on the plane of crystal of the quarter-wave plate.
4. according to claim 1 polarize unrelated phasing device, which is characterized in that the reflection unit includes speed
The reflecting mirror that axis transmits 90 degree of phase phase difference of polarization maintaining optical fibre and is plated on the end face of the polarization maintaining optical fibre.
5. according to any one of claim 1 to 4 polarize unrelated phasing device, which is characterized in that the phase
Modulator is single polarization phase modulator.
6. according to any one of claim 1 to 4 polarize unrelated phasing device, which is characterized in that the phase
Modulator is birefringent phase modulator.
7. according to any one of claim 1 to 4 polarize unrelated phasing device, which is characterized in that the polarization
Unrelated phasing device further includes optical circulator, and the optical circulator is set positioned at the front end of the polarization beam apparatus, institute
Stating optical circulator includes first port, second port and third port, wherein the light of the first port input of the optical circulator
Wave is exported via the second port of the optical circulator to the polarization beam apparatus；The polarization beam apparatus is exported to the ring of light
The light wave of the second port of shape device is exported via the third port of the optical circulator.
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| CN201920301108.2U CN209356770U (en) | 2019-03-08 | 2019-03-08 | Polarize unrelated phasing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572264A (en) * | 2019-09-23 | 2019-12-13 | 中国电子科技集团公司电子科学研究院 | Continuous variable quantum key distribution decoding method, device and system |
| CN115963602A (en) * | 2022-12-26 | 2023-04-14 | 武汉灵途传感科技有限公司 | Polarization-maintaining optical fiber circulator |
| CN116909051A (en) * | 2022-11-25 | 2023-10-20 | 剑芯光电(苏州)有限公司 | Polarization insensitive liquid crystal device |
-
2019
- 2019-03-08 CN CN201920301108.2U patent/CN209356770U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110572264A (en) * | 2019-09-23 | 2019-12-13 | 中国电子科技集团公司电子科学研究院 | Continuous variable quantum key distribution decoding method, device and system |
| CN116909051A (en) * | 2022-11-25 | 2023-10-20 | 剑芯光电(苏州)有限公司 | Polarization insensitive liquid crystal device |
| CN115963602A (en) * | 2022-12-26 | 2023-04-14 | 武汉灵途传感科技有限公司 | Polarization-maintaining optical fiber circulator |
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