CN203617544U - Control system adopting fuzzy-proportional controller to control semiconductor laser - Google Patents
Control system adopting fuzzy-proportional controller to control semiconductor laser Download PDFInfo
- Publication number
- CN203617544U CN203617544U CN201320880933.5U CN201320880933U CN203617544U CN 203617544 U CN203617544 U CN 203617544U CN 201320880933 U CN201320880933 U CN 201320880933U CN 203617544 U CN203617544 U CN 203617544U
- Authority
- CN
- China
- Prior art keywords
- analog
- digital
- fuzzy
- semiconductor laser
- controller
- 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
Images
Landscapes
- Semiconductor Lasers (AREA)
Abstract
The utility model discloses a control system adopting a fuzzy-proportional controller to control a semiconductor laser, and belongs to the field of semiconductor laser control. The control system solves the problem that the existing semiconductor laser controller can not suppress high-frequency noise and low-frequency noise of a light source simultaneously. The control system comprises a fuzzy controller, an analog proportional controller, a low 8-bit digital-analog converter, a high 8-bit digital-analog converter, a summator, a voltage-current converter, an analog-digital converter and a resistor R, wherein both the low 8-bit digital-analog converter and the high 8-bit digital-analog converter adopt 8-bit digital-analog converters; the fuzzy controller outputs 16-bit digital signals; the low 8-bit digital-analog converter and the high 8-bit digital-analog converter are respectively used for performing digital-analog conversion on high 8-bit digital signals and low 8-bit digital signals output by the fuzzy controller. The control system is concretely applied to the field of semiconductor laser control.
Description
Technical field
The utility model belongs to semiconductor laser control field.
Background technology
In actual engineering application, the intensity type sensing and demodulating changing based on light intensity is a kind of effective, reliable measurement scheme.But the unstable meeting of light source output power directly affects the precision of measuring system.The drive source of noise spectra of semiconductor lasers and temperature are carried out the Main Means that high accuracy control is stabilized light source power output.Traditional analog pid (Proportional-Integral-Differential) is controlled has good dynamic and static control characteristic, but is subject to external interference, poor stability, and is not easy to modulation; The digital control flexibility that can improve system and intelligent, but its response speed is slower, can not carry out high speed and real time control to the fluctuating of light source output power.
Utility model content
The utility model is cannot make the high-frequency noise of light source and the problem that low-frequency noise suppresses simultaneously in order to solve existing semiconductor laser controller, and the utility model provides a kind of control system that adopts fuzzy-proportional controller stabilization of semiconductor laser.
Adopt the control system of fuzzy-proportional controller stabilization of semiconductor laser, it comprises fuzzy controller, simulation proportional controller, least-significant byte digital to analog converter, most-significant byte digital to analog converter, adder, current-to-voltage convertor, analog to digital converter and resistance R;
The control signal output of described fuzzy controller is connected with the digital signal input end of least-significant byte digital to analog converter and the digital signal input end of most-significant byte digital to analog converter respectively, the analog signal output of least-significant byte digital to analog converter, the analog signal output of most-significant byte digital to analog converter and simulation proportional controller analog signal output respectively with first of adder, second is connected with the 3rd signal input part, the signal output part of adder is connected with the control signal input of semiconductor laser, the current signal output end of semiconductor laser is connected with one end of resistance R, the other end of this resistance R is connected with the positive input terminal of current-to-voltage convertor, the signal output part of current-to-voltage convertor is connected with the simulation signal input part of proportional controller and the input end of analog signal of analog to digital converter simultaneously, the digital signal output end of analog to digital converter is connected with the signal input part of fuzzy controller.
Described least-significant byte digital to analog converter and most-significant byte digital to analog converter are 8 figure place weighted-voltage D/A converters, what fuzzy controller was exported is 16 position digital signals, and high eight-bit digital signal and low eight-digit number word signal that least-significant byte digital to analog converter and most-significant byte digital to analog converter are respectively used to 16 position digital signals to fuzzy controller output carry out analog-to-digital conversion.
Described analog to digital converter is the analog to digital converter of 12.
Described fuzzy controller adopts chip microcontroller.
Described simulation proportional controller adopts analog feedback ratio circuit to realize.
Described current-to-voltage convertor adopts operational amplifier OP07 to realize.
In the control system of existing semiconductor laser, be all to adopt independent digitial controller or analog controller to realize, these two kinds of controllers respectively have pluses and minuses.The application is placed on the two in control system simultaneously, and performance advantage separately, learns from other's strong points to offset one's weaknesses, and has obtained beyond thought good technique effect.
The principle of the control system described in the application is: in the current signal process current-to-voltage convertor of semiconductor laser output, and the precise quantification numerical value after sampling and the target U of fuzzy controller inner setting
aimcompare and obtain error E and error change EC.Suppose that E value is now larger, fuzzy controller can be processed error change EC according to fuzzy rule, output fuzzy control quantity u
1, fuzzy control quantity u
1convert analog signal to through least-significant byte digital to analog converter, most-significant byte digital to analog converter again, after the signal of this analog signal and the output of simulation proportional controller is added in adder, export on semiconductor laser, realize the closed-loop control of noise spectra of semiconductor lasers power.
Most-significant byte digital to analog converter electric current output area: 195 μ A～49800 μ A, the every 10ms of voltage of the output after current-to-voltage convertor conversion controls once, the working point of noise spectra of semiconductor lasers is adjusted, it is 1/50 of most-significant byte digital to analog converter that least-significant byte digital to analog converter is adjusted step-length, the minimum adjustment of least-significant byte digital to analog converter precision is 3.89 μ A, the trickle adjustment of constant-current source drive current of noise spectra of semiconductor lasers, regulates control precision in real time.
When simulation proportional controller makes the working condition of semiconductor laser in relative stable state, i.e. E≤Δ
mintime, the output fuzzy control quantity u of fuzzy controller
1=0;
At this moment, simulation proportional controller is to acting on linear difference signal E adjustment, calculus of differences, ratio the constant-current source of semiconductor laser after amplifying, and noise spectra of semiconductor lasers is carried out more high-precision control.
Experiment and result: semiconductor laser diode in the semiconductor laser that experiment is selected, peak wavelength is 650nm, peak power output 5mW, threshold current 28.2mA, TO3 encapsulation.Get A=0.25, operating current I=36.3mA, in semiconductor laser, the direct current output variable of photodetector is 3.158V; 22 ℃ of laboratory environment temperature;
Static stability:
After tested, while only adopting constant-current source to drive, in semiconductor laser, photodetector output noise amplitude is ± 10mV.
When adopt employing described in the utility model fuzzy-the control system semiconductor laser power output of proportional controller stabilization of semiconductor laser applies after control, noise is all compressed significantly in high and low frequency range, specifically referring to Fig. 2, amplitude≤± 1.5mV.Static stability ± 0.48 ‰ of semiconductor laser power output.
Dynamic stability:
Investigate from one group of sine wave signal of 1K～1MHz the ability that light-source system suppresses dynamic disturbance from 1mV～100mV, frequency by apply amplitude at the drive end of semiconductor laser.After tested, under the sine wave signal of frequency 1MHz, amplitude 100mV disturbs, do not apply reach ± 20mV of semiconductor laser output noise amplitude while control; After controller of the present invention, in the scope of be compressed in ± 2.75mV of output noise, specifically referring to Fig. 3, the dynamic stability of semiconductor laser power output is ± 0.87 ‰.Fig. 2 and Fig. 3 are oscillography and show image.
The application has given full play to the advantage of existing fuzzy controller and proportional controller, and overcome the two defect, steady control when the power output of the control system noise spectra of semiconductor lasers of the application adopts fuzzy-proportional controller stabilization of semiconductor laser applies high-precision real, have that control precision is high, good stability, advantages of simple structure and simple, high and low frequency noise to light source can both suppress effectively, through experiment measuring, the static stability of semiconductor laser power output reaches ± and 0.48 ‰, dynamic stability < ± 1 ‰.
Accompanying drawing explanation
Fig. 1 be employing described in the utility model fuzzy-principle schematic of the control system of proportional controller stabilization of semiconductor laser;
Fig. 2 is utility model content part, the static stability schematic diagram of semiconductor laser output;
Fig. 3 is utility model content part, the dynamic stability schematic diagram of semiconductor laser output.
Embodiment
Embodiment one: present embodiment is described referring to Fig. 1, employing described in present embodiment is fuzzy-control system of proportional controller stabilization of semiconductor laser, and it comprises fuzzy controller 1, simulation proportional controller 7, least-significant byte digital to analog converter 2, most-significant byte digital to analog converter 3, adder 4, current-to-voltage convertor 6, analog to digital converter 8 and resistance R;
The control signal output of described fuzzy controller 1 is connected with the digital signal input end of least-significant byte digital to analog converter 2 and the digital signal input end of most-significant byte digital to analog converter 3 respectively, the analog signal output of least-significant byte digital to analog converter 2, the analog signal output of most-significant byte digital to analog converter 3 and simulation proportional controller 7 analog signal output respectively with first of adder 4, second is connected with the 3rd signal input part, the signal output part of adder 4 is connected with the control signal input of semiconductor laser 5, the current signal output end of semiconductor laser 5 is connected with one end of resistance R, the other end of this resistance R is connected with the positive input terminal of current-to-voltage convertor 6, the signal output part of current-to-voltage convertor 6 is connected with the simulation signal input part of proportional controller 7 and the input end of analog signal of analog to digital converter 8 simultaneously, the digital signal output end of analog to digital converter 8 is connected with the signal input part of fuzzy controller 1.
In present embodiment, fuzzy controller 1 and simulation proportional controller 7 are existing technology, and simplicity of design, the control cycle of fuzzy controller 1 are short, and dynamic characteristic is good; 7 of proportional controllers of simulation have fast, accurate, stability is high, be easy to the advantages such as realization, fuzzy controller 1 and simulation proportional controller 7 form mixture control, if the controlling elements of mixture control are K, E and EC are respectively error and the error changes after quantizing;
Wherein, k
1, k
2be respectively the controlling elements of fuzzy controller 1 and simulation proportional controller 7, Δ
minfor the minimum control precision of fuzzy controller 1, when error signal E>=Δ
mintime, select fuzzy controller 1 noise spectra of semiconductor lasers 5 to carry out power control; And when E< Δ
mintime, error signal E will directly enter simulation proportional controller 7, realize the real-time control of noise spectra of semiconductor lasers 5 light source output powers,
For fuzzy controller 1, it is controlled output variable and can be expressed as: u
1=-[k
1e+ (1-k
1) EC].Wherein, the linguistic variable subset of E is: { NB, NM, NS, 0, PS, PM, PB}; The linguistic variable subset of EC is: { NB, NS, PS, PB}.In the current signal process current-to-voltage convertor 6 of exporting through semiconductor laser 5, the target U of the precise quantification numerical value after sampling and fuzzy controller 1 inner setting
aimcompare and obtain error E and error change EC.Suppose that E value is now larger, fuzzy controller 1 can be processed error change EC according to fuzzy rule, output fuzzy control quantity u
1, fuzzy control quantity u
1convert analog signal to through least-significant byte digital to analog converter 2, most-significant byte digital to analog converter 3 again, the signal that this analog signal and simulation proportional controller 7 are exported is after the interior addition of adder 4, export on semiconductor laser 5, realize the closed-loop control of noise spectra of semiconductor lasers 5 power.
Most-significant byte digital to analog converter 3 electric current output areas: 195 μ A～49800 μ A, the every 10ms of voltage of the output after current-to-voltage convertor 6 conversion controls once, the working point of noise spectra of semiconductor lasers 5 is adjusted, it is 1/50 of most-significant byte digital to analog converter 3 that least-significant byte digital to analog converter 2 is adjusted step-length, the minimum adjustment precision of least-significant byte digital to analog converter 2 is 3.89 μ A, the trickle adjustment of constant-current source drive current of noise spectra of semiconductor lasers 5, regulates control precision in real time.
When simulation proportional controller 7 makes the working condition of semiconductor laser 5 in relative stable state, i.e. E≤Δ
mintime, the output fuzzy control quantity u of fuzzy controller 1
1=0;
At this moment, simulation proportional controller 7 is to acting on linear difference signal E adjustment, calculus of differences, ratio the constant-current source of semiconductor laser 5 after amplifying, and noise spectra of semiconductor lasers 5 is carried out more high-precision control.
Embodiment two: present embodiment is described referring to Fig. 1, employing described in present embodiment and embodiment one is fuzzy-and the difference of the control system of proportional controller stabilization of semiconductor laser is, described least-significant byte digital to analog converter 2 and most-significant byte digital to analog converter 3 are 8 figure place weighted-voltage D/A converters, what fuzzy controller 1 was exported is 16 position digital signals, and the high eight-bit digital signal of 16 position digital signals that least-significant byte digital to analog converter 2 and most-significant byte digital to analog converter 3 are respectively used to fuzzy controller 1 to export and low eight-digit number word signal carry out analog-to-digital conversion.
Embodiment three: present embodiment is described referring to Fig. 1, employing described in present embodiment and embodiment one or two is fuzzy-and the difference of the control system of proportional controller stabilization of semiconductor laser is, and described analog to digital converter 8 is the analog to digital converter of 12.
Embodiment four: present embodiment is described referring to Fig. 1, employing described in present embodiment and embodiment one or two is fuzzy-and the difference of the control system of proportional controller stabilization of semiconductor laser is, and described fuzzy controller 1 adopts chip microcontroller.
Embodiment five: present embodiment is described referring to Fig. 1, employing described in present embodiment and embodiment three is fuzzy-and the difference of the control system of proportional controller stabilization of semiconductor laser is, and described simulation proportional controller 7 adopts analog feedback ratio circuit to realize.
Embodiment six: present embodiment is described referring to Fig. 1, employing described in present embodiment and embodiment five is fuzzy-and the difference of the control system of proportional controller stabilization of semiconductor laser is, and described current-to-voltage convertor 6 adopts operational amplifier OP07 to realize.
Employing described in the utility model is fuzzy-and the structure of the control system of proportional controller stabilization of semiconductor laser is not limited to the concrete structure that the respective embodiments described above are recorded, and can also be the reasonable combination of the technical characterictic recorded of the respective embodiments described above.
Claims (6)
1. adopt the control system of fuzzy-proportional controller stabilization of semiconductor laser, it comprises fuzzy controller (1), it is characterized in that, it also comprises simulation proportional controller (7), least-significant byte digital to analog converter (2), most-significant byte digital to analog converter (3), adder (4), current-to-voltage convertor (6), analog to digital converter (8) and resistance R;
The control signal output of described fuzzy controller (1) is connected with the digital signal input end of least-significant byte digital to analog converter (2) and the digital signal input end of most-significant byte digital to analog converter (3) respectively, the analog signal output of least-significant byte digital to analog converter (2), the analog signal output of most-significant byte digital to analog converter (3) and simulation proportional controller (7) analog signal output respectively with first of adder (4), second is connected with the 3rd signal input part, the signal output part of adder (4) is connected with the control signal input of semiconductor laser (5), the current signal output end of semiconductor laser (5) is connected with one end of resistance R, the other end of this resistance R is connected with the positive input terminal of current-to-voltage convertor (6), the signal output part of current-to-voltage convertor (6) is connected with the signal input part of simulation proportional controller (7) and the input end of analog signal of analog to digital converter (8) simultaneously, the digital signal output end of analog to digital converter (8) is connected with the signal input part of fuzzy controller (1).
Employing according to claim 1 fuzzy-control system of proportional controller stabilization of semiconductor laser, it is characterized in that, described least-significant byte digital to analog converter (2) and most-significant byte digital to analog converter (3) are 8 figure place weighted-voltage D/A converters, what fuzzy controller (1) was exported is 16 position digital signals, and high eight-bit digital signal and low eight-digit number word signal that least-significant byte digital to analog converter (2) and most-significant byte digital to analog converter (3) are respectively used to 16 position digital signals to fuzzy controller (1) output carry out analog-to-digital conversion.
Employing according to claim 1 and 2 fuzzy-control system of proportional controller stabilization of semiconductor laser, it is characterized in that, described analog to digital converter (8) is the analog to digital converter of 12.
Employing according to claim 1 and 2 fuzzy-control system of proportional controller stabilization of semiconductor laser is characterized in that, described fuzzy controller (1) adopts chip microcontroller.
Employing according to claim 3 fuzzy-control system of proportional controller stabilization of semiconductor laser, it is characterized in that, described simulation proportional controller (7) adopts analog feedback ratio circuit to realize.
Employing according to claim 5 fuzzy-control system of proportional controller stabilization of semiconductor laser is characterized in that, described current-to-voltage convertor (6) adopts operational amplifier OP07 to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880933.5U CN203617544U (en) | 2013-12-30 | 2013-12-30 | Control system adopting fuzzy-proportional controller to control semiconductor laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880933.5U CN203617544U (en) | 2013-12-30 | 2013-12-30 | Control system adopting fuzzy-proportional controller to control semiconductor laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617544U true CN203617544U (en) | 2014-05-28 |
Family
ID=50770167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320880933.5U Expired - Fee Related CN203617544U (en) | 2013-12-30 | 2013-12-30 | Control system adopting fuzzy-proportional controller to control semiconductor laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617544U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276866A (en) * | 2020-02-15 | 2020-06-12 | 太原理工大学 | Semiconductor laser power control system based on SoC FPGA |
| CN112234422A (en) * | 2020-10-15 | 2021-01-15 | 黑龙江大学 | Dual-mode intermediate infrared parametric oscillator capable of switching output |
-
2013
- 2013-12-30 CN CN201320880933.5U patent/CN203617544U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276866A (en) * | 2020-02-15 | 2020-06-12 | 太原理工大学 | Semiconductor laser power control system based on SoC FPGA |
| CN111276866B (en) * | 2020-02-15 | 2021-04-20 | 太原理工大学 | Semiconductor laser power control system based on SoC FPGA |
| CN112234422A (en) * | 2020-10-15 | 2021-01-15 | 黑龙江大学 | Dual-mode intermediate infrared parametric oscillator capable of switching output |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104201563B (en) | A kind of semiconductor laser constant-power control circuit and working method | |
| CN100510634C (en) | Device for controlling average wavelength of light source in broad spectrum based on monitoring detector | |
| CN103389451B (en) | A kind of method of testing of avalanche photodide and proving installation | |
| CN102122920B (en) | Adaptive distributed type optical fiber temperature-measuring laser detection amplifier | |
| CN102778613B (en) | PIN-FET optical fiber receive module testing performance index method | |
| CN105573391A (en) | Open-circuit voltage control circuit of solar array simulator and open-circuit voltage control method thereof | |
| CN203617544U (en) | Control system adopting fuzzy-proportional controller to control semiconductor laser | |
| CN103872569A (en) | Method and device for stabilizing wavelength and power of er-doped fiber light source, and related light source | |
| CN203968061U (en) | Precision rectifying type phase-sensitive detection circuit | |
| CN102176184B (en) | Maximum power point tracking control circuit of photovoltaic cell | |
| CN202710200U (en) | Space remote sensing CCD camera high-precision CCD temperature measurement circuit | |
| CN106602846A (en) | Full-digital constant-voltage constant-current four-quadrant power supply | |
| CN202631420U (en) | Photoelectric detection circuit of heavy metal online monitor | |
| CN201937548U (en) | Self-adapting distributive optical fiber temperature measuring laser detection amplifier | |
| CN203826767U (en) | Drive and control circuit of semiconductor laser | |
| CN106301311A (en) | The high slope linear current groove of a kind of high accuracy | |
| CN205249236U (en) | Automatic coupled system of optical assembly | |
| CN205037900U (en) | Solid -state axial angle transmitting system of selsyn | |
| CN205160469U (en) | A monitor cell for photovoltaic power generation system monitoring devices | |
| CN107797499B (en) | Pulse type program-controlled power supply and control method | |
| CN201594462U (en) | Voltage regulator | |
| CN207457884U (en) | A kind of laser current control voltage source of CRDS gas concentration detectors | |
| CN204302754U (en) | Based on PLC digital-control constant-flow source circuit | |
| CN105322426A (en) | Pulse light source generating device for Brillouin sensors | |
| CN209542682U (en) | A kind of programmable hall current sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20141230 |
|
| EXPY | Termination of patent right or utility model |