CN202939504U - Dynamic polarization compensation control device of satellite quantum communication - Google Patents
Dynamic polarization compensation control device of satellite quantum communication Download PDFInfo
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- CN202939504U CN202939504U CN 201220706053 CN201220706053U CN202939504U CN 202939504 U CN202939504 U CN 202939504U CN 201220706053 CN201220706053 CN 201220706053 CN 201220706053 U CN201220706053 U CN 201220706053U CN 202939504 U CN202939504 U CN 202939504U
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Abstract
A dynamic polarization compensation control device of satellite quantum communication belongs to the polarization tracking technology field of the satellite quantum communication. The structure of the current polarization compensation device is complex. By using the device of the utility model, the above problem is solved. A CCD image sensor is used to collect a polarization state data signal of dynamic polarization simulation transmitting terminal beacon light. A polarization state sampling signal output terminal of the CCD image sensor is connected with a sampling signal input terminal of a Matlab image processor. A relative polarization deviation signal output terminal of the Matlab image processor is connected with a relative polarization deviation signal input terminal of a single chip microcomputer. A control signal output terminal of the single chip microcomputer is connected with a control signal input terminal of a stepper motor. A power-output shaft of the stepper motor drives a half-wave plate of a dynamic polarization receiving compensation terminal to rotate through a gear mechanism. The device of the utility model is suitable for the dynamic polarization compensation of the satellite quantum communication.
Description
Technical field
The utility model relates to the dynamic polarization compensate control apparatus of satellite quantum communications, belongs to the polarization tracking technical field of satellite quantum communications.
Background technology
Polarization tracking is one of gordian technique in the satellite quantum communications.In the quantum communications of polarization encoder satellite, transmitter and receiver need to have common polarization benchmark, so just can complete quantum communication protocol.But in space, both have common polarization benchmark and are difficult to be guaranteed due to transmitter or receiver.And, after transmitter and receiver enters closed loop locking tracking state, due to the satellite dynamics process, relative rotation likely occurs along its common center line in transmitter and receiver, makes the polarization benchmark change.In order to realize the quantum communications agreement, need to compensate the polarization benchmark is polarization tracking (Polarization Tracking).
At first the people such as Nordholt have proposed polarization tracking thought for star ground quantum-key distribution.The polarization zero direction is defined by the beacon that comes from transmitter or receiver, by the half-wave plate that rotates land station, compensates.The people such as Ma have been developed this thought, have set up the polarization tracking theoretical model based on half-wave plate.The people such as Zhang have carried out the experiment of free space quantum-key distribution, have verified the polarization tracking principle that the people such as Ma propose.Recently, the people such as Toyoshima has also proposed the polarisation based tracking scheme and has carried out the experiment of free space quantum-key distribution.
All there is complex structure in existing polarization compensation device, the defect that cost is higher.
Summary of the invention
The utility model is in order to solve the baroque problem of existing polarization compensation device, and a kind of dynamic polarization compensate control apparatus of satellite quantum communications is provided.
The dynamic polarization compensate control apparatus of satellite quantum communications described in the utility model, it comprises that dynamic polarization analog transmissions end and dynamic polarization receive the compensation end, it also comprises ccd image sensor, Matlab image processor, single-chip microcomputer, stepper motor and gear mechanism
Ccd image sensor is for gathering the polarization state data-signal of dynamic polarization analog transmissions end beacon beam, the polarization state sampled signal output terminal of ccd image sensor connects the sampled signal input end of Matlab image processor, the relative polarization deviation signal output terminal of Matlab image processor connects the relative polarization deviation signal input end of single-chip microcomputer, the control signal output terminal of single-chip microcomputer connects the control signal input end of stepper motor, and the power output shaft of stepper motor drives by gear mechanism the half-wave plate rotation that dynamic polarization receives the compensation end.
It also comprises keyboard and display,
The signal output part of keyboard connects the control signal input end of single-chip microcomputer, and the display output terminal of single-chip microcomputer connects the display input end of display.
Gear in described gear mechanism is plastic gear.
It also comprises direct supply,
Direct supply is used to single-chip microcomputer that working power is provided.
Advantage of the present utility model: the utility model adopts ccd image sensor to carry out data acquisition, utilize the Matlab image processor to be processed the hot spot picture of Real-time Collection, obtain dynamic polarization analog transmissions end and receive with dynamic polarization the axial relative polarization deviation that compensation is held, again by Single-chip Controlling half-wave plate axial-rotation, to reach the dynamic realization of polarization tracking and compensation.There is simple in structure, stable performance and reliable.
Of the present utility modelly realize that cost is low, the user is easy to use.
The accompanying drawing explanation
Fig. 1 is the structured flowchart of the dynamic polarization compensate control apparatus of satellite quantum communications described in the utility model.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, the dynamic polarization compensate control apparatus of the described satellite quantum communications of present embodiment, it comprises that dynamic polarization analog transmissions end 1 and dynamic polarization receive compensation end 2, it also comprises ccd image sensor 3, Matlab image processor 4, single-chip microcomputer 5, stepper motor 6 and gear mechanism 7
Present embodiment be take single-chip microcomputer 5 as core, and single-chip microcomputer 5, by the anglec of rotation and the rotational speed of control step motor 6, is regulated the half-wave plate rotation.
Single-chip microcomputer 5 adopts 8051 single-chip microcomputers.
Embodiment two: below in conjunction with Fig. 1, present embodiment is described, present embodiment is for to the further illustrating of embodiment one, and present embodiment also comprises keyboard 8 and display 9,
The signal output part of keyboard 8 connects the control signal input end of single-chip microcomputer 5, and the display output terminal of single-chip microcomputer 5 connects the display input end of display 9.
The input signal of single-chip microcomputer 5 identification keyboards 8 in present embodiment, and show on display 9.
Embodiment three: present embodiment is for to the further illustrating of embodiment one or two, and the gear in the described gear mechanism 7 of present embodiment is plastic gear.
Adopting plastic gear in present embodiment is in order not damage optical element, and can reduce power consumption.
Embodiment four: below in conjunction with Fig. 1, present embodiment is described, present embodiment is for to the further illustrating of embodiment one, two or three, and present embodiment also comprises direct supply 10,
Claims (4)
1. the dynamic polarization compensate control apparatus of satellite quantum communications, it comprises that dynamic polarization analog transmissions end (1) and dynamic polarization receive compensation end (2), it is characterized in that, it also comprises ccd image sensor (3), Matlab image processor (4), single-chip microcomputer (5), stepper motor (6) and gear mechanism (7)
Ccd image sensor (3) is for gathering the polarization state data-signal of dynamic polarization analog transmissions end (1) beacon beam, the polarization state sampled signal output terminal of ccd image sensor (3) connects the sampled signal input end of Matlab image processor (4), the relative polarization deviation signal output terminal of Matlab image processor (4) connects the relative polarization deviation signal input end of single-chip microcomputer (5), the control signal output terminal of single-chip microcomputer (5) connects the control signal input end of stepper motor (6), the power output shaft of stepper motor (6) drives by gear mechanism (7) the half-wave plate rotation that dynamic polarization receives compensation end (2).
2. the dynamic polarization compensate control apparatus of satellite quantum communications according to claim 1, is characterized in that, it also comprises keyboard (8) and display (9),
The signal output part of keyboard (8) connects the control signal input end of single-chip microcomputer (5), and the display output terminal of single-chip microcomputer (5) connects the display input end of display (9).
3. the dynamic polarization compensate control apparatus of satellite quantum communications according to claim 1 and 2, is characterized in that, the gear in described gear mechanism (7) is plastic gear.
4. the dynamic polarization compensate control apparatus of satellite quantum communications according to claim 1 and 2, is characterized in that, it also comprises direct supply (10),
Direct supply (10) is used to single-chip microcomputer (5) that working power is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706053 CN202939504U (en) | 2012-12-19 | 2012-12-19 | Dynamic polarization compensation control device of satellite quantum communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706053 CN202939504U (en) | 2012-12-19 | 2012-12-19 | Dynamic polarization compensation control device of satellite quantum communication |
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| Publication Number | Publication Date |
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| CN202939504U true CN202939504U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220706053 Expired - Fee Related CN202939504U (en) | 2012-12-19 | 2012-12-19 | Dynamic polarization compensation control device of satellite quantum communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942542A (en) * | 2017-12-31 | 2018-04-20 | 深圳市创鑫激光股份有限公司 | Optoisolator, laser export head, laser |
| PL423300A1 (en) * | 2017-10-30 | 2019-05-06 | Univ Warszawski | Receiver for receiving information transmitted by means of very weak pulses of light, system that contains such a receiver, designed to transmit information, and method for transmitting information by means of very weak pulses of light |
| CN111483615A (en) * | 2020-04-17 | 2020-08-04 | 中国科学院微小卫星创新研究院 | Method for realizing pointing posture of quantum satellite to ground optical station |
-
2012
- 2012-12-19 CN CN 201220706053 patent/CN202939504U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL423300A1 (en) * | 2017-10-30 | 2019-05-06 | Univ Warszawski | Receiver for receiving information transmitted by means of very weak pulses of light, system that contains such a receiver, designed to transmit information, and method for transmitting information by means of very weak pulses of light |
| CN107942542A (en) * | 2017-12-31 | 2018-04-20 | 深圳市创鑫激光股份有限公司 | Optoisolator, laser export head, laser |
| CN111483615A (en) * | 2020-04-17 | 2020-08-04 | 中国科学院微小卫星创新研究院 | Method for realizing pointing posture of quantum satellite to ground optical station |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20131219 |