CN1207609C - Method and system for controlling adaptive optic fiber squeezed electrocontrolled polarization controller - Google Patents
Method and system for controlling adaptive optic fiber squeezed electrocontrolled polarization controller Download PDFInfo
- Publication number
- CN1207609C CN1207609C CN 02131330 CN02131330A CN1207609C CN 1207609 C CN1207609 C CN 1207609C CN 02131330 CN02131330 CN 02131330 CN 02131330 A CN02131330 A CN 02131330A CN 1207609 C CN1207609 C CN 1207609C
- Authority
- CN
- China
- Prior art keywords
- voltage
- feedback signal
- control
- optical fiber
- polarization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000010287 polarization Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000835 fiber Substances 0.000 title claims description 10
- 230000003044 adaptive effect Effects 0.000 title claims description 8
- 239000013307 optical fiber Substances 0.000 claims abstract description 36
- 239000000919 ceramic Substances 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Images
Landscapes
- Mechanical Light Control Or Optical Switches (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The present invention relates to a method for controlling a self-adaptive optical fiber squeezed electronic control polarization controller and a system data polarization control field of the method. The present invention is characterized in that the control mode of drive voltage is a step length change mode, and the control voltage of a long try step length is used for ensuring a control speed in the process of feedback signal rise; when a set polarization state is approached, the control voltage of a short try step length is used for ensuring control precision; simultaneously, when a feedback signal reaches 95 percent of a maximum value, the optimum value function of the difference of values of the feedback signal and work voltage deviating from a central work point is used for effectively preventing the work voltage from deviating from the central work point and avoiding a restoration condition; a small step restoration method is used, and work is not interrupted when restoration is carried out. Simultaneously, a structure of an optical fiber squeezer is improved, half-wave voltage is reduced, the work range of the optical fibre squeezer is increased, the probability of restoration occurrence can also be effectively reduced, and thereby, only three optical fibre squeezers are used. An experimental result shows that the control speed reaches 2500 pi rad/s, and the control deviation of the polarization state is smaller than 1%.
Description
Technical field
The control method of adaptive optic fiber squeezed electrocontrolled polarization controller and system thereof belong to the polarization control technology field.
Background technology
Optic fiber squeezed electrocontrolled polarization controller is by mutual staggered five optical fiber squeezers at 45 of the direction of extrusion, and steering logic and piezo-ceramic micro displacement unit driving power three parts are formed.The core component of controller is an optical fiber squeezer, three squeezers parallel with vertical direction (being 0 °) wherein, and two in vertical direction with 45 in addition, alternately arranges.(the optical fiber squeezer concrete structure has obtained utility model patent 012334898) by the poincare sphere theory as can be known, three mutual optical fiber squeezers at 45 can constitute a full-wave plate, realize the conversion between random polarization state and the fixed polarisation state, reach the purpose of Polarization Control.The function of automatically controlled Polarization Controller can be expressed as: for input polarization arbitrarily, according to the feedback signal size, regulate the output polarization attitude by the driving voltage that steering logic changes on the squeezer, make the output polarization attitude and set polarization state and be consistent.
The effect of steering logic be according to feedback signal (feedback signal reflection be degree of agreement between the polarization state of output polarization attitude and setting, feedback signal reaches maximal value, expression output polarization attitude and setting polarization state fit like a glove), change the driving voltage of each optical fiber squeezer, make the output polarization attitude consistent with the setting polarization state, the major control process adopts the method for stepping, search to realize.Concrete job step is as follows:
1. attempt changing the voltage (attempting changing squeezer driving voltage Δ V) of some output
2. read in feedback signal, judge the situation of change (become big or diminish) of feedback signal
3. handle accordingly according to the variation of feedback signal.If it is big that feedback signal becomes, then keep the trial that this voltage changes; If feedback signal diminishes, cancel the change of voltage this time so and attempt, voltage is returned to original numerical value.
By constantly repeatedly trial, feedback signal will become bigger and bigger, and promptly the output polarization attitude is more and more approaching sets polarization state, thereby realizes the purpose of Polarization Control.
In the above-mentioned steering logic, it is single that voltage is attempted step-length, exists the contradiction of control rate and control accuracy: voltage trial step-length is long more, the control rate height, but control accuracy is low; Conversely, voltage trial step-length is short more, and control rate is slow, but control accuracy is then high.
In the practical application, exceed normal range of operation and excessive compression causes the damage of wrecking property of optical fiber, need the driving voltage near the squeezer of limiting voltage be returned to center voltage by resetting usually for fear of the driving voltage of optical fiber squeezer.When a certain squeezer is in when resetting, this squeezer does not just participate in control (being interrupt control).Therefore, in order to realize not having interruption reset condition, need five squeezers at least, promptly in control procedure, three squeezers are in the Control work state, and two squeezers are carried out and resetted in addition.Increase yet the increase of optical fiber squeezer number can cause inserting loss, control rate and control accuracy descend, and the volume of Polarization Controller and cost increase.
Summary of the invention
The object of the present invention is to provide and a kind ofly can take into account control rate and control accuracy simultaneously and only just can realize no interruption reset condition with three optical fiber squeezers, the while has also correspondingly been reduced the control method and the system thereof of the adaptive optic fiber squeezed electrocontrolled polarization controller of insertion loss.
The invention is characterized in: the control mode of its driving voltage is the variable step formula, in the feedback signal uphill process, makes the rising edge of feedback signal enough suddenly to guarantee the control rate requirement with the long control voltage of attempting step-length; Near the setting polarization state time, make the feedback signal amplitude of variation little to guarantee control accuracy with the short control voltage of attempting step-length; Particularly, it contains following steps successively:
Be in when not needing to reset, carry out according to following order:
(1) according to the size of feedback signal last time, the step-length that control voltage is attempted is set: feedback signal is big more, and the step-length that corresponding control voltage is attempted is more little; If feedback signal is peaked 90% less than it, the trial step-length of then corresponding control voltage becomes big;
(2) voltage increases a step-length;
(3) read feedback signal, be calculated as follows the situation of change of the merit function S of feedback signal, thereby as if decision should not cancel the trial of this control voltage with the judgement feedback signal:
U in the formula
f: feedback signal;
V (i): each road control voltage, i is a sequence number;
V
Mid: the midrange in the piezo-ceramic micro displacement unit operating voltage range;
(4) if feedback signal greater than peaked 95%, then judging whether to keep this voltage according to the change direction of the merit function of feedback signal attempts: if merit function diminishes, the expression driving voltage changes to exceeding the normal range of operation direction, may cause reset case ground to take place, should cancel this and attempt voltage and change next voltage attempting direction; Otherwise, keep this and attempt voltage;
If it is peaked 95% that feedback signal does not reach as yet, then judge whether to keep this and attempt voltage:, should cancel this and attempt voltage and change attempting voltage direction next time if feedback signal diminishes according to the change direction of feedback signal; Otherwise, keep this and attempt voltage;
Be in the time of need resetting, the method that adopts small step to reset is promptly only made the control voltage of piezo-ceramic micro displacement unit in the scope that little variation returns to permission, and then is carried out next road control voltage and handle.
The control method that proposes according to the present invention and the adaptive optic fiber squeezed electrocontrolled polarization control system that designs, it is characterized in that: it contains: the optical fiber squeezer of accepting input optical signal, accept the polarizer of the light signal of optical fiber squeezer output, the light intensity detector that links to each other with the polarizer output terminal, accept the A/D converter of feedback signal of light intensity detector output and the single-chip microcomputer that is connected successively with above-mentioned A/D converter, D/A converter, the voltage amplifier that output terminal links to each other with the input end of piezo-ceramic micro displacement unit in the optical fiber squeezer.
Described optical fiber squeezer comprises that the direction of extrusion is mutually staggered three optical fiber squeezers of miter angle.
Described each optical fiber squeezer, the length of its anchor clamps and piezo-ceramic micro displacement unit cross-sectional length are isometric, and its side direction compression aspect becomes 22.5 degree angles with surface level.
Described optical fiber squeezer is to ZL01233489.8, the improvement of " locking the inclined plane slide block type optical fiber squeezer certainly " patented technology by name.
Use proof: it has realized intended purposes.
Description of drawings
Fig. 1: cross-sectional length relativeness figure between the piezo-ceramic micro displacement unit of optical fiber squeezer and anchor clamps
1 (a): piezoelectric ceramics and anchor clamps are isometric, and it is very little to introduce loss;
1 (b), 1 (c): piezoelectric ceramics and anchor clamps are not isometric, introduce microbending loss.
Fig. 2: optical fiber squeezer wiring layout;
Fig. 3: the schematic block circuit diagram of optic fiber squeezed electrocontrolled polarization controller system;
Fig. 4: the program flow chart of the method for the invention.
Fig. 5: improve the inclined plane slide block type of the locking certainly optical fiber squeezer structure after designing
5 (a): positive 22.5 degree optical fiber squeezers;
5 (b): negative 22.5 degree optical fiber squeezers;
Embodiment
Be further described with example below in conjunction with Fig. 2, Fig. 3:
If: the operating voltage on each road is 150V; The voltage power supply scope is (100～200) V; The value of initial feedback signal is 10; The feedback on reservation signal maximum is 2000; The minimum step that voltage is attempted is 0.1V, and maximum step-length is 1V.
Initial situation: each road voltage all in working range, does not need to reset.
Boost phase:
1. comparing the maximal value of feedback signal and feedback signal, is 0.5%, and much smaller than 95%, it is 1V that setting voltage is attempted step-length;
2. first via voltage is increased by one and attempt step-length, operating voltage is 151V;
3. reading in feedback signal is 50;
4. feedback signal becomes big, keeps this voltage and attempts;
5. enter next step voltage and judge, repeating step 1～5, totally three tunnel.
The control stage:
Original state: three tunnel control voltages are respectively 133V, 172V, 155V; Feedback signal is 1990; The merit function S=1988.1 of feedback signal; The feedback signal maximal value is 2000.
1. comparing the maximal value of feedback signal and feedback signal, is 99.5%, and much larger than 95%, the trial step-length of setting voltage is 0.1V;
2. first via voltage is increased by one and attempt step-length, operating voltage becomes 133.1V;
3. read in feedback signal, feedback signal is 1993;
4. calculate the merit function of feedback signal, the result is 1991.3;
5. the feedback signal merit function becomes big, keeps this voltage and attempts;
6. enter the judgement of next road voltage, repeating step 1～5.
In this stage, voltage is attempted step-length and all is in minimum value.Can guarantee very high control accuracy, and because scope range of the fluctuation of voltage is corresponding also little, thereby can effectively reduce the probability of happening that resets.
This shows that the present invention can realize high control rate and control accuracy simultaneously; The merit function of introducing can prevent effectively that operating voltage from departing from midrange, avoids the generation that resets.
In addition, the improvement of optical fiber squeezer reduces half-wave voltage, has increased the working range of optical fiber squeezer, also can reduce the probability that resets and take place effectively, only uses three optical fiber squeezers to become possibility thereby make.
Claims (3)
1. the control method of adaptive optic fiber squeezed electrocontrolled polarization controller, it is change direction and size according to the feedback signal of the degree of agreement between the polarization state of reflection output polarization attitude and setting, the driving voltage that changes piezo-ceramic micro displacement unit in the optical fiber squeezer by steering logic is regulated the output polarization attitude, when feedback signal is maximum, its output polarization attitude just is consistent with the setting polarization state, it is characterized in that: the control mode of its driving voltage is the variable step formula, in the feedback signal uphill process, make the rising edge of feedback signal enough suddenly to guarantee the control rate requirement with the long control voltage of attempting step-length; Near the setting polarization state time, make the feedback signal amplitude of variation little to guarantee control accuracy with the short control voltage of attempting step-length; Particularly, it contains following steps successively:
Be in when not needing to reset, carry out according to following order:
(1) according to the size of feedback signal last time, the step-length that control voltage is attempted is set: feedback signal is big more, and the step-length that corresponding control voltage is attempted is more little; If feedback signal is peaked 90% less than it, the trial step-length of then corresponding control voltage becomes big;
(2) voltage increases a step-length;
(3) read feedback signal, be calculated as follows the situation of change of the merit function S of feedback signal, thereby whether decision should cancel the trial of this control voltage with the judgement feedback signal:
U in the formula
f: feedback signal;
V (i): each road control voltage, i is a sequence number;
V
Mid: the midrange in the piezo-ceramic micro displacement unit operating voltage range;
(4) if feedback signal greater than peaked 95%, then judging whether to keep this voltage according to the change direction of the merit function of feedback signal attempts: if merit function diminishes, the expression driving voltage changes to exceeding the normal range of operation direction, may cause the generation of reset case, should cancel this and attempt voltage and change next voltage attempting direction; Otherwise, keep this and attempt voltage;
If it is peaked 95% that feedback signal does not reach as yet, then judge whether to keep this and attempt voltage:, should cancel this and attempt voltage and change attempting voltage direction next time if feedback signal diminishes according to the change direction of feedback signal; Otherwise, keep this and attempt voltage;
Be in the time of need resetting, the method that adopts small step to reset is promptly only made the control voltage of piezo-ceramic micro displacement unit in the scope that little variation returns to permission, and then is carried out next road control voltage and handle.
2. the control method of adaptive optic fiber squeezed electrocontrolled polarization controller according to claim 1 and designed system, it is characterized in that, it contains: the optical fiber squeezer of accepting input optical signal, accept the polarizer of the light signal of optical fiber squeezer output, the light intensity detector that links to each other with the polarizer output terminal, accept the A/D converter of feedback signal of light intensity detector output and the single-chip microcomputer that is connected successively with above-mentioned A/D converter, D/A converter, the voltage amplifier that output terminal links to each other with the input end of piezo-ceramic micro displacement unit in the optical fiber squeezer; Described optical fiber squeezer comprises that the direction of extrusion is mutually staggered three optical fiber squeezers of miter angle.
3. adaptive optic fiber squeezed electrocontrolled polarization control system according to claim 2, it is characterized in that: described each optical fiber squeezer, the length of its anchor clamps and piezo-ceramic micro displacement unit cross-sectional length are isometric, and its side direction compression aspect becomes 22.5 degree angles with surface level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02131330 CN1207609C (en) | 2002-09-29 | 2002-09-29 | Method and system for controlling adaptive optic fiber squeezed electrocontrolled polarization controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02131330 CN1207609C (en) | 2002-09-29 | 2002-09-29 | Method and system for controlling adaptive optic fiber squeezed electrocontrolled polarization controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1402050A CN1402050A (en) | 2003-03-12 |
| CN1207609C true CN1207609C (en) | 2005-06-22 |
Family
ID=4746649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02131330 Expired - Fee Related CN1207609C (en) | 2002-09-29 | 2002-09-29 | Method and system for controlling adaptive optic fiber squeezed electrocontrolled polarization controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1207609C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127781A1 (en) * | 2010-04-16 | 2011-10-20 | 华为技术有限公司 | Method and device for improving performance of polarization controller |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199415B (en) * | 2013-03-09 | 2015-11-18 | 广东汉唐量子光电科技有限公司 | The super continuous spectrums Photonic Crystal Fiber Lasers of stability contorting |
| CN103227406A (en) * | 2013-04-28 | 2013-07-31 | 陈国梁 | Passive mode-locking optical fiber laser device |
| CN103368054A (en) * | 2013-07-26 | 2013-10-23 | 上海朗研光电科技有限公司 | Fast feedback control method and system for locked-mode self-starting of optical fiber laser |
| CN106785868B (en) * | 2016-12-30 | 2023-06-16 | 中国电子科技集团公司第三十四研究所 | Laser polarization state control stabilization device and control stabilization method |
| CN216016880U (en) * | 2020-12-30 | 2022-03-11 | 广东国腾量子科技有限公司 | Light polarization correction system for QKD |
| CN115255576B (en) * | 2022-07-27 | 2024-06-04 | 深圳市爱达思技术有限公司 | Welding working point setting method, device, equipment and storage medium |
-
2002
- 2002-09-29 CN CN 02131330 patent/CN1207609C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127781A1 (en) * | 2010-04-16 | 2011-10-20 | 华为技术有限公司 | Method and device for improving performance of polarization controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1402050A (en) | 2003-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1207609C (en) | Method and system for controlling adaptive optic fiber squeezed electrocontrolled polarization controller | |
| CN1064487C (en) | Power control apparatus for solar power generation system | |
| CN1129969C (en) | Reference voltage semiconductor device | |
| CN1197331A (en) | Output buffer circuit having low breakdown voltage | |
| CN1095820A (en) | The pixel control circuitry that is used for spatial light modulator | |
| CN1320518C (en) | Device and method for controlling display brightness level | |
| CN1661400A (en) | Opto-electronic integrated circuit device, opto-electronic integrated circuit system and transmission method | |
| CN1235409A (en) | Piezoelectric driving circuit | |
| CN2697702Y (en) | Hierarchical type clock gate control circuit | |
| CN2718635Y (en) | Multi-power source charging sequential control circuit | |
| CN1885667A (en) | Power supply management method and system | |
| CN1301428C (en) | Liquid crystal display panel | |
| CN1289943C (en) | Calibrating voltage controllable optical components in communication systems | |
| CN1744487A (en) | A kind of fourth-order network multi ring surface chaos circuit and using method thereof | |
| CN2785251Y (en) | Switching type control equipment with output power limit and low-voltage protection | |
| CN1818818A (en) | Switching controller with outputting-power limitation and low-voltage protection | |
| CN1717807A (en) | Solid-state imager and method for manufacturing same | |
| CN2877127Y (en) | Control circuit with frequency modulation for decreasing electromagnetic interference of power converter | |
| CN1716157A (en) | Switching type power supply system and its method for automatic regulating circuit work frequency | |
| CN1349144A (en) | Compact DC voltage-stabilized power supply for inhibiting undulation of voltage output when sudden undulation of load current occured | |
| CN1266822C (en) | Automatic switching method for stand-by electric fan and circuit thereof | |
| CN1510427A (en) | Electric power on/off module | |
| CN2738454Y (en) | Capacity charging circuit with soft starting function | |
| CN1306703C (en) | Line driver and output signal controlling method thereof | |
| CN1236622C (en) | Information entropy holding coding method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |