CN1828371A - Device and method for quantitatively adjusting polarization - Google Patents
Device and method for quantitatively adjusting polarization Download PDFInfo
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- CN1828371A CN1828371A CN 200610072875 CN200610072875A CN1828371A CN 1828371 A CN1828371 A CN 1828371A CN 200610072875 CN200610072875 CN 200610072875 CN 200610072875 A CN200610072875 A CN 200610072875A CN 1828371 A CN1828371 A CN 1828371A
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Abstract
The device comprises: a light input end, a light output end, a dynamic polarization controller with input end behind the output, a on-line polarization measurer with input end connected to the output end of the dynamic controller and output end connected to the light output end, and a control circuit connected the electric signal input end of the measurer and output end of the controller. This invention can measure polarization, DOP, and has compact structure for mobile and independent work.
Description
Technical field
The invention belongs to field of optical measuring technologies, particularly use online measuring polarization state device, dynamic polarization controller and electronic circuit computing, will import the device and method that light is adjusted to the polarization state of any user's needs by setting.
Background technology
The light polarization correlation parameter is very great to the influence of light beam or light signal, polarization state is a kind of significant data of light beam state description, on fibre system and optical information processing and transmission technology, the difference of polarization state of light brings material impact can for the related system performance.Therefore, be starved of the polarization state that can produce any needs, also be starved of simultaneously and measure polarization state of light soon in optical information processing and transmission technique field.
Polarization state of light is the present polarization form of quantitative description light, is one of four big essential characteristics of light (other three are light intensity, wavelength, phase place).Accurately measure and accurately provide polarization state of light, most important for the optical information technical field.
Polarization state of light has various ways, comprising linearly polarized light, circularly polarized light, elliptically polarized light, partial poolarized light and nonpolarized light.
Polarization state of light has multiple mathematics description method, can use trigonometric function to represent method, Jones vector method, Stokes vector method and poincare sphere graphic interpretation.
The method of a polarization state of selecting arbitrarily of a kind of acquisition of using always at present is to be undertaken by building a temporary system, and the structure of this system comprises as shown in Figure 1: 12, one milivoltmeters 14 of 15, one online measuring polarization state devices of a Polarization Controller; The annexation of each parts is: the light input of online measuring polarization state device 12, electric output terminal link to each other with the light output end of Polarization Controller 15 and the input end of milivoltmeter 14 respectively.
The key step of its method is as follows:
1, incident light 11 passes Polarization Controller 15, arrives online measuring polarization state device 12, and online measuring polarization state device 12 will produce several electric signal of representing polarization state 13 outputs at signal output part.
2, use milivoltmeter 14 to measure several signal values 13 of online measuring polarization state device 12, the line item of going forward side by side successively.These several signal numerical value are calculated according to corresponding formulas, thereby obtain the polarization state numerical value of light beam.
3, the polarization state numerical value that obtains and the polarization state numerical value of anticipation are compared, obtain difference;
4, regulate Polarization Controller 15, make the polarization state of light of passing through change;
5, reuse several signal values that milivoltmeter is measured online measuring polarization state device successively, the line item of going forward side by side;
6, once more the polarization state numerical value that obtains and the polarization state numerical value of anticipation are compared,, then obtained the polarization state of anticipation if reached the anticipation index; If also have difference, then continue repeating step 5～7, up to obtaining envisioning polarization state;
The method of an arbitrarily selected polarization state of this acquisition has following shortcoming:
1, will build a measuring system and will be by manually writing down and calculating, Measuring Time is long, often needs repeatable operation, complicated operating process temporarily;
2, measuring accuracy is low, and real-time is poor: because system's polarization polarization state of light tends to change at any time, the long-time numerical value of measuring and measuring successively has error;
3, system is difficult for moving: owing to be the system of building, integration is very poor usually, can't integral body move, and is unfavorable for measurement requirement anywhere or anytime;
Summary of the invention
The objective of the invention is to propose a kind of device of quantitatively adjusting polarization for overcoming the weak point of prior art, this device both can be accurately, the polarization state of measuring beam quickly and easily; Can also be according to user's setting, will accurate by the light of this device, the convenient, fast polarization state that is adjusted to any needs.
The device of the quantitatively adjusting polarization that the present invention proposes, it comprises:
A light input end mouth is used for being input in the middle of the device being conditioned light;
An optical output port is used for output with the light after being conditioned;
A dynamic polarization controller, its light input end is connected on described light input end mouth back by optical fiber, is used for regulating passing through polarization state of light;
An online measuring polarization state device is used for measuring by the polarisation of light state parameter, and converts each parameter to electric signal; Its input end is connected on described dynamic polarization controller optical output port by optical fiber, and optical output port is connected on the described optical output port;
A control circuit links to each other with the electrical signal of described online measuring polarization state device, is used for the electric signal that receives is handled; Link to each other with dynamic polarization controller electrical input, be used for driving the dynamic polarization controller.
The employing said apparatus that the present invention proposes produces the method that needs polarization state arbitrarily, it is characterized in that, may further comprise the steps:
1) with the polarization state numerical value of needs as the setting value input control circuit;
2) input light arrives online measuring polarization state device by the dynamic polarization controller;
3) online measuring polarization state device produces one group and the corresponding electric signal of current input polarization state;
4) control circuit is extracted in the electric signal of linear polarization measuring appliance, after comparing through processing with setting value, produces the signal that drives the dynamic polarization controller;
5) control circuit is according to the state of a control of above-mentioned signal adjustment Polarization Controller, and making the output polarization state of light becomes needed polarization state.
The effect of principal feature of the present invention and generation:
1, compact conformation can work independently, and is easy and simple to handle, is convenient to move.
2, can directly input light be adjusted to needed random polarization state; Show polarization state adjusting result simultaneously; This has just fully solved low, the problems such as repeatable accuracy is low, measuring speed is slow, use inconvenience of precision that the method that present optoelectronic areas adopted exists.
3, the present invention can realize the on-line measurement polarization state under the situation of not cutting off light path, thereby measures in real time and monitoring provides important means for the user.
4, measuring accuracy height:, can obtain very high measuring accuracy and produce polarization state accurately owing to adopted the combination of the direct computing of circuit and dynamic polarization controller and online measuring polarization state device.
5, this device can be noted tested polarization state by the control circuit computing, and the required polarization state with user's setting compares then, through computing, drives Polarization Controller and regulates the requirement that the input polarization state of light reaches the user.
6, the combination of the multiple function of integrated device realizes on a covering device except measuring polarization state and producing the polarization state that needs, and can also be used to measuring degree of polarization (DOP) and generation and disturbs polarisation.
Description of drawings
Fig. 1 is optical system synoptic diagram of selecting polarization state arbitrarily of acquisition commonly used at present;
Fig. 2 arranges synoptic diagram for the embodiments of the invention contour structures;
Fig. 3 forms and fundamental diagram for embodiments of the invention;
Fig. 4 is a control panel embodiment schematic layout pattern of the present invention;
Fig. 5 is used to produce the fundamental diagram of disturbing the polarisation purposes for native system, and wherein 5A is the natural light synoptic diagram; 5B is for disturbing the polarisation synoptic diagram; 5C disturbs the polarisation fundamental diagram for producing;
Embodiment
The adjustable measurement mechanism of polarization state that the present invention proposes and the course of work thereof reach embodiment in conjunction with the accompanying drawings and are described in detail as follows:
The measuring polarization state device with adjusting polarization state function of the present invention's design, form structure embodiment shown in Fig. 2,3, this device comprises: the one-piece construction that all-in-onecase 21 constitutes, front panel at cabinet is equipped with the display device 22 that is made of display screen, control gear 23 and light input end mouth 24, the user interface that optical output port 25 constitutes, as shown in Figure 2.One dynamic polarization controller, 32, one online measuring polarization state device 33 and control circuit boards are installed in cabinet.The input end 31 of light is connected dynamic polarization controller 32 1 ends, the output terminal 34 of light is connected the output terminal of online measuring polarization state device 33, and an other end of dynamic polarization controller 32 and an other end of online measuring polarization state device 33 carry out light path by optical fiber and be connected.Dynamic polarization controller 32 carries out circuit with control circuit board respectively with online measuring polarization state device 33 and is connected.The Polarization Controller driving circuit is installed on the control circuit board, signal amplification circuit, analog to digital conversion circuit, D/A converting circuit, and based on the central control circuit 35 of microprocessor; Cabinet inside also is equipped with power circuit 38 and peripheral interface circuit 37, and central control circuit 35 carries out circuit with these circuit respectively and is connected, this control circuit also with user interface on control gear 23 be connected with display device 22 circuit.As shown in Figure 3.
Present embodiment has used an operation independent circuit 36 based on microprocessor, carries out the calculation function of central control circuit separately, in order to improve the behavior in service of circuit.
The embodiment of the user interface of this device is a control panel 40, and as shown in Figure 4, whole front panel 40 comprises:
1 display screen 22 is used for showing measures and is provided with data;
1 power switch 42 and a power light 43 are used for the electric power system of switchgear;
1 light input end mouth 24 is used for inserting fibre-optical splice and will or be conditioned the light input by photometry;
1 optical output port 25 is used for inserting fibre-optical splice and will or be conditioned light output by photometry;
The control gear of 15 button formations is used for whole device is provided with, and wherein controls the control device 47 that button is formed for 11, is used for selecting the setting and the mode of operation of whole device, and the polarization state parameter of required generation; Four regulating devices 46 of regulating the button composition are used for and control button cooperating the concrete numerical value of adjusting setting.
Above-mentioned display device, control device, dynamic polarization controller, online measuring polarization state device, power supply circuit all can be made into standalone module, connect from cabinet is outside by cable.
The function and the embodiment of the each several part device of this device are respectively described below:
Online measuring polarization state device is used for measuring by polarization state of light taking a sample by light, to circuit board output and the corresponding electric signal of polarization state; The embodiment of online measuring polarization state device 33 adopts the General Photonics POD-15 of company type product.It is placed in the light path, takes a sample to carried out polarization state optics by photometry, and converts light signal to electric signal.
Circuit on the circuit board is used for receiving detectable signal, and with data storage and computing, can accept the setting of control signal simultaneously, and the operation of control dynamic polarization controller; Wherein: the embodiment of signal amplification circuit adopts conventional linear amplifier circuit or logarithm amplifying circuit, the embodiment of analog to digital conversion circuit is the circuit that core designs routinely with the general commercial modulus conversion chip, is used for converting the analog electrical signal of online measuring polarization state device output to digital signal; It is the design circuit routinely of core that central control circuit 35 embodiment adopt the general commercial fpga chip, and it is the design circuit routinely of core that the embodiment of computing circuit 36 adopts the general commercial dsp chip; The embodiment of D/A converting circuit is the circuit that core designs routinely with the general commercial analog-digital chip; The Polarization Controller driving circuit adopts design voltage output circuit routinely; The embodiment of power circuit adopts ordinary tap power supply or linear power supply circuit, is used to whole device power supply; The embodiment of peripheral interface circuit 37 adopts the custom circuit based on RS232, USB and Ethernet interface, relevant measurement data can be outputed to other display equipment or offer other control gears and utilize these data to carry out other useful control; The embodiment of control device and regulating device adopts control signal input button (employing conventional products) to constitute, by button whole device is provided with, and the Control work process; Display device embodiment adopts conventional number or LCDs to show.
The user interface layout embodiment of the device of quantitatively adjusting polarization of the present invention control panel 40 as shown in Figure 4 is provided with in the above: a light input end mouth 24 that adopts optical fiber to realize is used for and will be input to by photometry in the middle of the device.A display screen, this embodiment are the commercial LCD display 22 of a bar shaped (YUSUNG HY series 82.8mm * 18.4mm), be used for showing and measure and be provided with data; The control device 47 and the regulating device 46 that adopt control signal input button 23 (employing conventional products) to constitute are provided with whole device by button, and the Control work process.An optical output port 25 that adopts optical fiber to realize is used for exporting the light that is adjusted to any required polarization state.A power switch 42 that adopts general-purpose device to realize is used for energized; A power light 43 is used for showing whether whole device is in "on" position.
The course of work that present embodiment obtains any required polarization state is described as follows in conjunction with Fig. 3:
1, the control gear that constitutes by button of user is input to needed polarization state parameter in the middle of the central control circuit 35;
2, be conditioned light 31 by dynamic polarization controller 32, enter into measuring polarization state device 33;
3,33 pairs of light that pass through of online measuring polarization state device are taken a sample, and produce one group and the present corresponding analog electrical signal of polarization state; This signal converts digital electric signal to by analog to digital conversion circuit and is input to central control circuit 35 based on microprocessor after amplifying circuit amplifies;
4, based on the central control circuit of microprocessor signal is preserved, computing circuit 36 reads signal and carries out computing from central control circuit preservation unit; Calculate the corresponding polarization state value of these group data;
5, central control circuit reads the polarization state value, and its parameter with input in step 1 is compared;
6, computing circuit calculates the difference with input parameter, and converts this difference to control signal, outputs on the dynamic polarization controller 32 by D/A converting circuit and driving circuit;
7, dynamic polarization controller 32 reception control signals adjust accordingly the light that passes through;
8, repeating step 3～5, if relatively difference is 0, illustrate that the polarization state of output light 34 is the set polarization state of user, and whole process is finished; If also there is difference, then proceed step 6～7, be 0 until difference;
Said apparatus also can be realized following function:
One can be measured polarization state of light, and its course of work is as follows:
1, passed through the dynamic polarization controller by photometry 31, enter into measuring polarization state device (dynamic polarization controller 32 and Polarization Controller driving circuit, D/A converting circuit are in off position at this moment);
2,33 pairs of light that pass through of online measuring polarization state device are taken a sample, and produce one group and the corresponding electric analoging signal of the present polarization state of light; After this signal amplifies by amplifying circuit, enter analog to digital conversion circuit and convert digital electric signal to and be input to central control circuit based on microprocessor;
3, based on the central control circuit of microprocessor signal is preserved, computing circuit 36 reads signal and carries out computing from control circuit preservation unit; Calculate the corresponding polarization state value of these group data;
4, the central control circuit based on microprocessor reads the polarization state value, and it is presented on the display screen;
Its two, be can measure by polarisation of light degree (DOP), its course of work is as follows:
1, the user adjusts to measurement degree of polarization (DOP) duty by button with this device:
2, input light is by behind the dynamic polarization controller, and when entering " measuring polarization state device ", the measuring polarization state device can carry out input light the polarization state sampling, and the polarization signal of obtaining is transformed into analog electrical signal, is transferred to " signal amplification circuit ";
3, " signal amplification circuit " amplifies analog electrical signal, and this electric signal is transferred to " analog to digital conversion circuit ";
4, " analog to digital conversion circuit " becomes digital signal with analog signal conversion; Be transferred to control circuit;
5, control circuit is stored digital signal, put in order and is distributed;
6, computing circuit carries out the degree of polarization computing from control circuit extraction signal, calculates the numerical value of the current degree of polarization of reflection, outputs to control circuit;
7, control circuit is stored digital signal, put in order, outputs to display circuit, and display circuit carries out degree of polarization numerical value and shows on display screen;
Its three, be to be used as scrambler, what realize to produce simulating nature light disturbs the inclined to one side function of disturbing of polarisation.
In optical information transmission and processing technology field,, usually use and disturb the natural light 51 that polarisation replaces not having polarization characteristic in order to eliminate the influence of polarized light to optical information system.The characteristics of natural light are all the time, light all have a polarization characteristic (shown in Fig. 5 A) on all directions.Disturbing polarisation then is that polarization state constantly changes (shown in Fig. 5 B) at random, and this variation can take place in the very short time interval, to such an extent as to optical information system impression less than this time interval, thereby reach the characteristic of nonpolarized light.
Its course of work following (shown in Fig. 5 C):
1, the user passes through button, this device is adjusted to disturbed inclined to one side duty;
2, control circuit extracts a random algorithm from computing circuit, and output order is to Polarization Controller;
3, Polarization Controller in a short period of time, constantly sends various control signal 58 at random according to instruction, realizes continuous conversion Polarization Control, thereby makes by very fast constantly the changing of the polarization state of light of Polarization Controller, obtains disturbing polarisation output 54.
Claims (8)
1, a kind of device of quantitatively adjusting polarization is characterized in that, this device comprises:
A light input end mouth is used for being input in the middle of the device being conditioned light;
An optical output port is used for exporting the light after being conditioned;
A dynamic polarization controller, its light input end are connected on described light input end mouth back, are used for regulating passing through polarization state of light;
An online measuring polarization state device is used for measuring by the polarisation of light state parameter, and converts each parameter to electric signal; Its light input end is connected on the optical output port of described dynamic polarization controller, and optical output port is connected on the described optical output port;
A control circuit links to each other with dynamic polarization controller electric signal input end with the electrical signal of described online measuring polarization state device, is used for the electric signal that receives comfortable linear polarization measuring appliance is handled; And produce control signal to the dynamic polarization controller.
2, the device of quantitatively adjusting polarization as claimed in claim 1 is characterized in that, described control circuit comprises:
A signal amplification circuit, its input end links to each other with the output terminal of described online measuring polarization state device, is used for the electric signal that receives is amplified;
An analog to digital conversion circuit, the electrical signal conversion that is used for amplifying becomes digital signal, and its input end links to each other with the output terminal of described signal amplification circuit;
Central control circuit based on microprocessor, its input end links to each other with the analog-digital conversion circuit as described output terminal, is used for the digital signal that receives is handled and controlled.
A Polarization Controller driving circuit is used for described dynamic polarization controller is driven;
A D/A converting circuit, the digital signal that is used for receiving converts analog electrical signal to;
Wherein, the electrical input mouth of described dynamic polarization controller links to each other with the output terminal of Polarization Controller driving circuit, and the input end of described D/A converting circuit and output terminal link to each other with output terminal based on the central control circuit of microprocessor with the input end of described Polarization Controller driving circuit respectively.
3, the device of quantitatively adjusting polarization as claimed in claim 2 is characterized in that, described amplifying circuit is linear amplifier circuit or logarithm amplifying circuit.
4, the device of quantitatively adjusting polarization as claimed in claim 1 is characterized in that, described control circuit also comprises:
A logical circuit is used for being received in the electric signal of linear polarization measuring appliance, produces a control signal after treatment, drives the dynamic polarization controller; Its electrical input links to each other with measuring polarization state device electricity output terminal, and electric output terminal links to each other with dynamic polarization controller electrical input.
5, the device of quantitatively adjusting polarization as claimed in claim 1 is characterized in that, this device also comprises a cover control gear, is used for whole device is carried out the setting of mode of operation and parameter.
6, the device of quantitatively adjusting polarization as claimed in claim 5 is characterized in that, described control gear comprises the regulating device that is used for that the control device of mode of operation is set and is used for cooperating with control device the concrete numerical value of adjusting setting.
7, the device of quantitatively adjusting polarization as claimed in claim 1 is characterized in that, this device also comprises a cover display device, and its input end is connected on the described control circuit, is used for showing metrical information and configuration information.
8, adopt the generation of device according to claim 1 to need the method for polarization state arbitrarily, it is characterized in that, may further comprise the steps:
1) with the polarization state numerical value of needs as the setting value input control circuit;
2) input light arrives online measuring polarization state device by the dynamic polarization controller;
3) online measuring polarization state device produces one group and the corresponding electric signal of current input polarization state;
4) control circuit is extracted in the electric signal of linear polarization measuring appliance, after comparing through processing with setting value, produces the signal that drives the dynamic polarization controller;
5) control circuit is according to the state of a control of above-mentioned signal adjustment Polarization Controller, and making the output polarization state of light becomes needed polarization state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100728758A CN100389340C (en) | 2006-04-14 | 2006-04-14 | Device and method for quantitatively adjusting polarization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100728758A CN100389340C (en) | 2006-04-14 | 2006-04-14 | Device and method for quantitatively adjusting polarization |
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| CN1828371A true CN1828371A (en) | 2006-09-06 |
| CN100389340C CN100389340C (en) | 2008-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100728758A Expired - Fee Related CN100389340C (en) | 2006-04-14 | 2006-04-14 | Device and method for quantitatively adjusting polarization |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100562716C (en) * | 2008-05-16 | 2009-11-25 | 西南交通大学 | Online polarized light time-domain reflection optical fiber sensing equipment |
| CN101943801A (en) * | 2010-07-13 | 2011-01-12 | 中国科学院苏州纳米技术与纳米仿生研究所 | High-speed terahertz polarization regulator and regulation and control method thereof |
| CN102983962A (en) * | 2012-12-04 | 2013-03-20 | 上海朗研光电科技有限公司 | Polarization self-starting method for polarization encoding quantum secret key distribution system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3671986D1 (en) * | 1985-03-18 | 1990-07-19 | Nec Corp | DEVICE FOR REGULATING THE POLARIZATION WITH A BEAM SPLITTER. |
| US6686984B1 (en) * | 2000-02-29 | 2004-02-03 | Agilent Technologies, Inc. | Polarization control device |
| US6576886B1 (en) * | 2001-02-20 | 2003-06-10 | General Photonics Corporation | Dynamic control of polarization of an optical signal |
| AU2002348972A1 (en) * | 2001-11-09 | 2003-05-19 | Newton Technologies, Inc. | Polarization controlling |
| WO2004083945A1 (en) * | 2003-03-18 | 2004-09-30 | Fujitsu Limited | Infinite follow-up polarization controller, polarization mode dispersion compensator comprising same, and infinite follow-up polarization control method |
-
2006
- 2006-04-14 CN CNB2006100728758A patent/CN100389340C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100562716C (en) * | 2008-05-16 | 2009-11-25 | 西南交通大学 | Online polarized light time-domain reflection optical fiber sensing equipment |
| CN101943801A (en) * | 2010-07-13 | 2011-01-12 | 中国科学院苏州纳米技术与纳米仿生研究所 | High-speed terahertz polarization regulator and regulation and control method thereof |
| CN102983962A (en) * | 2012-12-04 | 2013-03-20 | 上海朗研光电科技有限公司 | Polarization self-starting method for polarization encoding quantum secret key distribution system |
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| CN100389340C (en) | 2008-05-21 |
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Effective date of registration: 20190507 Address after: 14351 Pipeline Street, Chino, Southern California, USA Patentee after: General Optoelectronics Company Address before: 100089 Block C1 303, Yicheng Building, No. 11 Changchun Bridge Road, Haidian District, Beijing Patentee before: Beijing Gaoguang Technology Co., Ltd. |
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Granted publication date: 20080521 Termination date: 20200414 |