CN201413925Y - Closed loop feedback intelligent control system for tunable laser - Google Patents
Closed loop feedback intelligent control system for tunable laser Download PDFInfo
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- CN201413925Y CN201413925Y CN2009201089750U CN200920108975U CN201413925Y CN 201413925 Y CN201413925 Y CN 201413925Y CN 2009201089750 U CN2009201089750 U CN 2009201089750U CN 200920108975 U CN200920108975 U CN 200920108975U CN 201413925 Y CN201413925 Y CN 201413925Y
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Abstract
The utility model relates to a closed loop feedback intelligent control system for a tunable laser, which belongs to the application fields of photoelectrons, laser, optical frequency conversion and photoelectron and optical communication control. The system comprises a pumping source, a tunable laser, a data acquisition system, a communication part, an executing mechanism and a host machine; andthe laser emitted by the pumping source is pumped to the tunable laser, the laser emitted by the tunable laser is partially received by a grating monochromator after passing through a spectroscope, the data acquisition system collects the laser parameter output by the spectroscope through the grating monochromator, the laser parameter is transmitted to the host machine through the communication part, the host machine performs comparison to the collected laser parameter and the preset laser parameter in the host machine, a control signal is formed according to the difference value between the laser parameters to control the rotational angle of a mechanical rotating platform, and the angle of the nonlinear crystal is further adjusted to form closed loop control. The utility model can realizevarious functions of automatic scaling of the output wavelength of the laser, automatic power detection and adjustment, wavelength and power monitoring, and the like.
Description
Technical field
The utility model is a kind of closed-loop feedback intelligent control system of tunable laser, belongs to photoelectron, laser, optical frequency conversion and photoelectron and optical communication control application.
Background technology
All the time, after adding tunable optical element in the optical parameter laser, the output of generation tunable laser, the needed laser frequency in the field that is applied, become one of focus of studying for many years both at home and abroad, and different-waveband, as ultraviolet, infrared in can seeing closely, and the extensive use of the continuously adjustable laser of THz wave band, particularly at laser medicine and biology, laser chemistry and isotope separation, atmosphere environment supervision, micro-processing technology is to the demand of the Micro-Structure Analysis of material system, make researchers adopt different technical research tunable laser, make that the wave band of tunable laser output is more and more wideer.At present, in the tunable laser device, the continuous or pulse laser of high-power and high-lighting beam quality is as the appearance of pump light source with the nonlinear optical crystal of the high-quality that is suitable for different-waveband, and the research of tunable optical parametric laser no longer becomes a difficult problem.But up to the present, the tuning part in tunable laser has plenty of employing and manually adjusts the mechanical device of placing nonlinear crystal, or the dispersion element in the control resonant cavity; Have plenty of the mechanical device of placing nonlinear crystal by microcomputer-based intelligent control, or the dispersion element of control tunable laser, export continuously to reach needed laser.Also occur in recent years much for using a computer/the Single-chip Controlling mechanical actuating mechanism, in order to the report and the experiment of the output light wavelength of tuned laser.But can only be confined to special use/task equipment mostly, act on the special-purpose angle tuning control system of a certain crystal.And perfect mostly inadequately on its function, can not finish such as complex operations such as auto-scaling, output wavelength detections.And these are in practical operation, no matter be manually or Based Intelligent Control all can not directly measure the laser of tunable laser output, must detect by energy and the wavelength that checkout equipment will be exported laser.
The utility model content
The purpose of this utility model has been to overcome the defective that can not finish output wavelength auto-scaling, output wavelength detection of complex of existing tuning control system, a kind of closed-loop feedback intelligent control system of tunable laser has been proposed, this system adopts close-loop feedback control, controls the laser parameter of tunable laser output automatically.
To achieve these goals, the utility model has been taked following technical scheme.Native system comprises pumping source, tunable laser, spectroscope, grating monochromator, data acquisition system, communications portion, actuator, nonlinear crystal, is used to place the mechanical turntable and the main frame of nonlinear crystal.Wherein: the laser pumping tunable laser of sending by pumping source, laser part output behind spectroscope by tunable laser output is used, another part is received by grating monochromator, form closed-loop control through follow-up circuit, be specially: the output of grating monochromator links to each other with data acquisition system, receive the parameter of output laser, accurately to feed back to communication system, data acquisition system links to each other with main frame by communication part, communication part links to each other with the mechanical turntable of placing nonlinear crystal by actuator. and data acquisition system is gathered spectroscopical output laser parameter by grating monochromator, and send main frame to through communication part, main frame compares laser parameter of gathering and the laser parameter that sets in advance in main frame, form control signal according to the difference between the two, this control signal is by communication part and the rotation of actuating mechanism controls machinery turntable, and then the angle of control nonlinear crystal, the laser parameter that sets in advance in the output parameter of regulating laser and the main frame is consistent, the formation closed-loop control.
Described data acquisition system comprises photoelectric probe, amplifier, gain controller, noise removing, controlled integrator and the analog to digital converter that connects successively, and photoelectric probe receives the output laser of grating monochromator, and analog to digital converter links to each other with communication part.
Described actuator comprises first electric machine controller and second electric machine controller, is connected with mechanical turntable respectively, controls the angle of mechanical turntable.
The utility model is that main frame is finished the closed-loop control to whole optical path system laser output parameter with the computer, can realize finishing to the auto-scaling of the output wavelength of laser, automatically multiple functions such as power detection and adjusting, wavelength and power monitoring warning.
Closed-loop feedback intelligent control system can satisfy human-computer dialogue, the wavelength of tunable laser output is controlled, and by the data acquisition checkout equipment output wavelength that detects is fed back to communication agency simultaneously, further accurately controls the laser of output again.This closed loop feedback intelligence control system only is applicable to the angle tuning laser system of nonlinear crystal, can be as required, the tuning angle-data of the different nonlinear crystals of input is controlled on main frame easily, equipment such as incorporate mechanical turntable controller, monochromator, power meter just, with the computer is that main frame is controlled its unification, realizes the auto-scaling of the output wavelength of tunable laser, wavelength output, automated power detection and multiple function soft, the hardware systems such as adjusting, wavelength and power monitoring of intelligence.
Description of drawings
The vertical view of Fig. 1 tunable laser close-loop feedback control systematic schematic diagram
Data acquisition system structured flowchart in Fig. 2 tunable laser close-loop feedback control system
Communication system architecture block diagram in the close-loop feedback control system of Fig. 3 tunable laser
Among the figure: 1. pumping source; 2. tunable laser; 3. spectroscope; 4. grating monochromator; 5. data acquisition system; 6. communications portion; 7. actuator; 8. main frame; 9. the light path of Optical Maser System; 10. nonlinear crystal; 11. base plate; 12. photoelectric probe; 13. amplifier; 14. gain controller; 15. noise removing; 16. controlled integrator; 17. analog to digital converter; 19. transfer of data and order control line; 20. first electric machine controller; 21. second electric machine controller; 22. data line; 23. command transfer line.
Embodiment
The utility model is described in further detail below in conjunction with Fig. 1～Fig. 3:
Originally be embodied as the close-loop feedback control system of tunable laser, for no matter be that continuously adjustable laser, ultrashort pulse tunable laser all can adopt this close-loop feedback control system.Native system is main frame with the computer, and to the tuning part Based Intelligent Control of tunable laser, wavelength output, automated power detection and the multiple functions such as adjusting, wavelength and power monitoring warning of the auto-scaling of the output wavelength of realization laser, intelligence are.
The structured flowchart of present embodiment such as Fig. 1 comprise pumping source 1, tunable laser 2, spectroscope 3, grating monochromator 4, data acquisition system 5, communications portion 6, actuator 7, nonlinear crystal 10, are used to place the mechanical turntable 11a and the main frame 8 of nonlinear crystal 10.Place pumping source 1, laser pumping tunable optical again parametric laser 2 by pumping source 1 output, laser process spectroscope 3 by tunable laser 2 outputs, part light is output as light path 9, another part is directly received by monochromator 4, again, receive the back and the data of gathering are fed back to the communications portion 6 that is made of single-chip microcomputer by data acquisition system 5, communications portion 6 sends the laser parameter of gathering to main frame 8, main frame 8 compares laser parameter of gathering and the target component value that is provided with in advance in main frame, produce control command according to comparison value, this control command is through communication part 6, the actuator 7 that forms by mechanical part, the nonlinear crystal of controlling on the mechanical turntable 11a that is placed on the base plate 11 10 produces angle tunings, obtains tunable laser output.
The structure of data acquisition system 5 as shown in Figure 2 in the present embodiment, comprise the photoelectric probe 12, amplifier 13, gain controller 14, noise removing 15, controlled integrator 16 and the analog to digital converter 17 that connect successively, photoelectric probe 12 receives the output laser of grating monochromator 4, and analog to digital converter 17 links to each other with communication part 6.Laser beam 9 is received by photoelectric probe 12, to be converted to the signal of telecommunication, further amplify through amplifier 13, and obtain the control of gain controller 14, through noise removing 15, controlled integrator 16, analog to digital converter 17, the analog to digital converter 17 of this moment is connected with main frame 8 by micro controller (51 series monolithic) 6 of communications portion, and control command is handled and obtained to the data of gathering, and realizes the part of data acquisition of closed loop feedback control system.
The structure of the communications portion 6 of present embodiment as shown in Figure 3, communication part is realized by a slice single-chip microcomputer, single-chip microcomputer is respectively by data acquisition line 22 and control command line 23 and main frame 8, data acquisition system 5, grating monochromator 4, the first electric machine controller 20a and the second electric machine controller 20b also link to each other with driver on the mechanical turntable 11a respectively, control mechanical turntable 11a rotation, realize the communications portion of closed loop feedback control system.
Present embodiment adopts all solid state laser (semiconductor laser LD pumping Yb:YAG or accent Q Nd:YAG laser) pumping nonlinear optical crystal, realize closed-loop feedback intelligent control system, laser to tunable laser output is exported control, again according to the output Laser feedback information that detects, further control the precision of required laser output simultaneously.Present embodiment is equipment such as incorporate mechanical turntable controller, monochromator, power meter, with the computer is that main frame is controlled its unification, realizes the auto-scaling of the output wavelength of laser, wavelength output, automated power detection and the multiple function of adjusting, wavelength and power monitoring soft, the hardware system of intelligence.Solve the existing special-purpose angle tuning control system that special use or task equipment act on a certain crystal that is confined to, also solve simultaneously existing system and can not finish the difficulty of the close-loop feedback control of complex operations such as output wavelength auto-scaling, output wavelength detection, realized the closed loop feedback Based Intelligent Control of the laser parameter of tunable laser output.
Claims (3)
1, the closed-loop feedback intelligent control system of tunable laser is characterized in that: comprise pumping source (1), tunable laser (2), spectroscope (3), grating monochromator (4), data acquisition system (5), communications portion (6), actuator (7), nonlinear crystal (10), be used to place the mechanical turntable (11a) and the main frame (8) of nonlinear crystal (10); Wherein: the laser pumping tunable laser of sending by pumping source (1) (2), laser part output behind spectroscope (3) by tunable laser (2) output is used, another part is received by grating monochromator (4), the output of grating monochromator (4) links to each other with data acquisition system (5), and data acquisition system (5) receives the wavelength of laser output; Data acquisition system (5) links to each other with main frame (8) by communication part (6), and communication part (6) links to each other with the mechanical turntable (11a) of placing nonlinear crystal (10) by actuator (7); Data acquisition system (5) is gathered the output laser parameter of spectroscope (3) by grating monochromator (4), and send main frame (8) to through communication part (6), main frame (8) compares laser parameter of gathering and the laser parameter that sets in advance in main frame (8), form control signal according to the difference between the two, this control signal is controlled mechanical turntable (11a) rotation by communication part (6) and actuator (7), and then the angle of control nonlinear crystal, the laser parameter that sets in advance in the laser parameter of regulating tunable laser (2) output and the main frame is consistent.
2, the closed-loop feedback intelligent control system of tunable laser according to claim 1, it is characterized in that: described data acquisition system comprises photoelectric probe (12), amplifier (13), gain controller (14), noise removing (15), controlled integrator (16) and the analog to digital converter (17) that connects successively, photoelectric probe (12) receives the output laser of grating monochromator (4), and analog to digital converter (17) links to each other with communication part (6).
4, the closed-loop feedback intelligent control system of tunable laser according to claim 1 is characterized in that: described communication part is a slice single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009201089750U CN201413925Y (en) | 2009-06-05 | 2009-06-05 | Closed loop feedback intelligent control system for tunable laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201089750U CN201413925Y (en) | 2009-06-05 | 2009-06-05 | Closed loop feedback intelligent control system for tunable laser |
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| CN201413925Y true CN201413925Y (en) | 2010-02-24 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609956B (en) * | 2009-06-05 | 2011-06-08 | 北京工业大学 | Closed-loop feedback intelligent control system of tunable laser |
| CN102193519A (en) * | 2011-04-12 | 2011-09-21 | 广东大族粤铭激光科技股份有限公司 | Laser power control method and system |
| CN105261925A (en) * | 2015-08-24 | 2016-01-20 | 中国科学院等离子体物理研究所 | Automatic control system for power of HCN laser interferometer |
| CN107065619A (en) * | 2017-05-15 | 2017-08-18 | 武汉光迅科技股份有限公司 | The wavelength control electrode parameter establishing method and device of a kind of tunable laser |
| CN107579410A (en) * | 2017-10-18 | 2018-01-12 | 哈尔滨工业大学 | A kind of laser Automatic adjustment method |
| CN107800029A (en) * | 2017-10-18 | 2018-03-13 | 哈尔滨工业大学 | A kind of automatic temperature-controlled solid laser system with an automatic light meter |
| CN109088300A (en) * | 2018-08-30 | 2018-12-25 | 吉林省科英激光股份有限公司 | A kind of three wavelength laser generators with built-in power detection device |
-
2009
- 2009-06-05 CN CN2009201089750U patent/CN201413925Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609956B (en) * | 2009-06-05 | 2011-06-08 | 北京工业大学 | Closed-loop feedback intelligent control system of tunable laser |
| CN102193519A (en) * | 2011-04-12 | 2011-09-21 | 广东大族粤铭激光科技股份有限公司 | Laser power control method and system |
| CN105261925A (en) * | 2015-08-24 | 2016-01-20 | 中国科学院等离子体物理研究所 | Automatic control system for power of HCN laser interferometer |
| CN107065619A (en) * | 2017-05-15 | 2017-08-18 | 武汉光迅科技股份有限公司 | The wavelength control electrode parameter establishing method and device of a kind of tunable laser |
| CN107065619B (en) * | 2017-05-15 | 2019-10-29 | 武汉光迅科技股份有限公司 | A kind of the wavelength control electrode parameter setting method and device of tunable laser |
| CN107579410A (en) * | 2017-10-18 | 2018-01-12 | 哈尔滨工业大学 | A kind of laser Automatic adjustment method |
| CN107800029A (en) * | 2017-10-18 | 2018-03-13 | 哈尔滨工业大学 | A kind of automatic temperature-controlled solid laser system with an automatic light meter |
| CN109088300A (en) * | 2018-08-30 | 2018-12-25 | 吉林省科英激光股份有限公司 | A kind of three wavelength laser generators with built-in power detection device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100224 Effective date of abandoning: 20090605 |