CN101604815A - The laser frequency stabiliz ation method of a kind of control impuls laser settling time - Google Patents
The laser frequency stabiliz ation method of a kind of control impuls laser settling time Download PDFInfo
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- CN101604815A CN101604815A CNA2009100166631A CN200910016663A CN101604815A CN 101604815 A CN101604815 A CN 101604815A CN A2009100166631 A CNA2009100166631 A CN A2009100166631A CN 200910016663 A CN200910016663 A CN 200910016663A CN 101604815 A CN101604815 A CN 101604815A
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Abstract
The present invention relates to a kind of laser frequency stabiliz ation method of control impuls pulse build-up time, its start pulse signal of utilize measuring the pulse signal source of tunable pulsed laser device begins the trigger impulse laser, and the time difference of the output pulsed laser signal that produced of afterpulse laser between constantly obtains settling time of pulse laser with it constantly, and provide increase or reduce to control voltage commands by single-chip microcomputer in view of the above, the length that this control voltage commands is regulated piezoelectric ceramic, thereby change the resonant cavity chamber length of laser and control its change direction, the pulse build-up time of laser output is remained near the minimum value, thereby stablized the frequency of pulse laser, the output laser power also is stabilized near the maximum.The present invention does not need complicated frequency discrimination device, has advantage simple in structure, that volume is little, cost is low, is applicable to the pulse laser frequency stabilization.Can be applicable to fields such as coherent laser radar, laser spectroscopy, laser measurement.
Description
Technical field
The present invention relates to a kind of laser frequency stabiliz ation method, the laser frequency stabiliz ation method of specifically a kind of control impuls laser settling time.
Background technology
Stable main passive frequency stabilization and the active frequency stabilization dual mode of adopting of present laser frequency.Passive frequency stabilization is exactly the operational environment of control laser, selects the laser cavity material, changes the influence that laser frequency is changed to reduce extraneous factor.Passive frequency stabilization measure mainly contains: (1) selects for use the little material of linear expansion coefficient to do the cavity of laser; (2) reduce the influence (as shockproof, isolation, current stabilization, constant temperature etc.) of surrounding environment to laser; (3) pipe structure of appropriate design laser.
Environment is comparatively complicated in a lot of real works, adopts passive frequency stabilization system can not guarantee that laser has higher frequency stability, so people adopt multiple active frequency stabilization measure, makes laser all have higher frequency stability in various environment.Initiatively frequency stabilization mainly is to regulate long or other parameter in chamber automatically by the feedback signal of utilizing the frequency shakiness to cause, make laser get back to stable operating frequency again, thereby reach the purpose of frequency stabilization, more common active frequency-stabilizing method has saturated absorption frequency stabilization, Stark effect frequency stabilization, the frequency stabilization of molecule photoelectric current etc.The weak point of existing active frequency-stabilizing method is to need complicated frequency discrimination devices, so complex structure, volume is big, cost is high, has limited the extensive use of frequency stabilized carbon dioxide laser greatly.And existing active frequency-stabilizing method only is applicable to the frequency stabilization of continuous laser, and is not suitable for the pulse laser frequency stabilization.Up to now, yet there are no the bibliographical information of the laser frequency stabiliz ation method of control impuls laser settling time.
Summary of the invention
Technical problem to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, a kind of complicated frequency discrimination device that do not need is provided, have advantage simple in structure, that volume is little, cost is low, be applicable to the laser frequency stabiliz ation method of control impuls settling time of pulse laser frequency stabilization.Can be applicable to fields such as coherent laser radar, laser spectroscopy, laser measurement.
The technical scheme that the present invention solves the problems of the technologies described above employing is: the laser frequency stabiliz ation method of a kind of control impuls settling time, with beam splitter the output laser of tunable pulsed laser device is divided into two bundles, transmitted light is directly exported through beam splitter, the reflector laser of beam splitter is received by photodetector, photodetector converts light signal to and is input to counter after the signal of telecommunication amplifies through amplifier again, it is characterized in that: the start pulse signal of the pulse signal source of pulse laser also is input to the enabling signal of counter as counting when being input to pulse laser, counter begins counting when receiving the start pulse signal that pulse signal source sends, when receiving the pulsed laser signal of beam splitter reflection again, finishes by counter once counting, the resonant cavity of pulse laser is equipped with piezoelectric ceramic, also provide increase in view of the above or reduce to control voltage commands the settling time of calculating pulse laser according to the count value of counter acquisition by single-chip microcomputer, this control voltage commands is through digital-to-analogue conversion, be applied on the piezoelectric ceramic after amplifying through voltage amplifier again, the length that the control voltage commands is regulated piezoelectric ceramic, thereby the resonant cavity chamber that changes pulse laser is long, the variation of the resonant cavity chamber of pulse laser long variation causing laser output pulse build-up time, the pulse laser settling time that the single-chip microcomputer analysis is relatively successively more adjacent, if pulse laser reduces settling time, then explanation control voltage commands is in the right direction to the long control that changes of resonant cavity, if instead pulse laser increases settling time, then think incorrect, single-chip microcomputer changes the control voltage commands immediately, and then change the long controlling party that changes in resonant cavity chamber to, the pulse build-up time of the pulse laser of maintenance output is all the time near minimum value, thereby stablized the frequency of pulse laser, the pulse build-up time of laser output power maximum is the shortest, so the output laser power also is stabilized near the maximum.
The inventive method utilization is measured tunable pulsed laser device time difference between constantly of afterpulse laser output pulse laser with it that is triggered constantly and is obtained settling time of pulse laser, and provide the control voltage commands of regulating piezoelectric ceramic length in view of the above, thereby change the resonant cavity chamber length of laser and control its change direction, the pulse build-up time of output laser is remained near the minimum value, thereby the frequency of stable pulse laser, the output laser power also is stabilized near the maximum.The present invention does not need complicated frequency discrimination device, thereby has an advantage simple in structure, that volume is little, cost is low, other active frequency-stabilizing method only is applicable to the frequency stabilization of continuous laser, and the inventive method is applicable to the pulse laser frequency stabilization, can be applicable to fields such as coherent laser radar, laser spectroscopy, laser measurement.
Description of drawings
Fig. 1 is a FB(flow block) of the present invention.
Fig. 2 is the comparison schematic diagram of the adjacent laser pulse output waveform of the present invention.
Number in the figure is: 1. pulse laser, 2. piezoelectric ceramic (PZT), 3. pulse signal generator, 4 beam splitters, 5. photodetector, 6. signal amplifier, 7. counter, 8. single-chip microcomputer, 9. digital-to-analogue conversion, 10. voltage amplifier, 11. laser pulse output waveforms, 12. adjacent laser pulse output waveforms.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
FB(flow block) of the present invention as shown in Figure 1, on the output laser optical path of tunable pulsed laser device 1, place beam splitter 4, the transmitted light of beam splitter 4 is directly exported, coaxial placement photodetector 5 on the reflected light path of beam splitter 4, the output signal of telecommunication of photodetector 5 is delivered to amplifier 6, the output signal of telecommunication of amplifier 6 is delivered to counter 7, it is characterized in that: the start pulse signal of the pulse signal source 3 of pulse laser is delivered to pulse laser 1 sum counter 7 simultaneously, the resonant cavity of pulse laser 1 is equipped with piezoelectric ceramic 2, the output signal of telecommunication of counter 7 is delivered to single-chip microcomputer 8, the output signal of telecommunication of single-chip microcomputer 8 is delivered to digital-to-analogue conversion 9, the output signal of telecommunication of digital-to-analogue conversion 9 is delivered to voltage amplifier 10, and the output signal of telecommunication of voltage amplifier 10 is applied on the piezoelectric ceramic 2.
As shown in Figure 1, the course of work of the present invention is: with beam splitter 4 the output laser of tunable pulsed laser device 1 is divided into two bundles, transmitted light is directly exported through beam splitter 4, the reflector laser of beam splitter 4 is received by photodetector 5, photodetector 5 converts light signal to and is input to counter 7 after the signal of telecommunication amplifies through amplifier 6 again, the start pulse signal of the pulse signal source 3 of pulse laser 1 also is input to the enabling signal of counter 7 as counting when being input to pulse laser 1, counter 7 begins counting when receiving the start pulse signal that pulse signal source 3 sends, when receiving the pulsed laser signal of beam splitter 4 reflections, finishes by counter 7 once counting, the resonant cavity of pulse laser 1 is equipped with piezoelectric ceramic 2, also provide increase in view of the above or reduce to control voltage commands the settling time of calculating pulse laser according to the count value of counter 7 acquisitions by single-chip microcomputer 8, the control voltage commands is through digital-to-analogue conversion 9, be applied on the piezoelectric ceramic 2 after amplifying through voltage amplifier 10 again, the length that the control voltage commands is regulated piezoelectric ceramic 2, thereby the resonant cavity chamber that changes pulse laser 1 is long, the variation of the resonant cavity chamber of pulse laser 1 long variation causing laser output pulse build-up time, the comparison schematic diagram of the adjacent laser pulse output waveform of the present invention as shown in Figure 2,11,12 is t
0And t
1The adjacent pulse laser output waveform of pairing priority of the moment, single-chip microcomputer 8 is analyzed the pulse build-up time of relatively successively more adjacent pulse laser, if pulse laser reduces settling time, then explanation control voltage commands is in the right direction to the long control that changes of resonant cavity, if instead pulse laser increases settling time, then the side of recognizing is incorrect, the single-chip microcomputer 8 instant control voltage commands that change, and then change resonant cavity long change controlling party to, the pulse build-up time that keeps output laser is all the time near minimum value, thereby stablized the frequency of pulse laser, the pulse build-up time of laser output power maximum is the shortest, so the output laser power also is stabilized near the maximum.
Claims (1)
1. the laser frequency stabiliz ation method of a control impuls pulse build-up time, with beam splitter the output laser of tunable pulsed laser device is divided into two bundles, transmitted light is directly exported through beam splitter, the reflector laser of beam splitter is received by photodetector, photodetector converts light signal to and is input to counter after the signal of telecommunication amplifies through amplifier again, it is characterized in that: the start pulse signal of the pulse signal source of pulse laser also is input to the enabling signal of counter as counting when being input to pulse laser, counter begins counting when receiving the start pulse signal that pulse signal source sends, when receiving the pulsed laser signal of beam splitter reflection again, finishes by counter once counting, the resonant cavity of pulse laser is equipped with piezoelectric ceramic, also provide increase in view of the above or reduce to control voltage commands the settling time of calculating pulse laser according to the count value of counter acquisition by single-chip microcomputer, this control voltage commands is through digital-to-analogue conversion, be applied on the piezoelectric ceramic after amplifying through voltage amplifier again, the length that the control voltage commands is regulated piezoelectric ceramic, thereby the resonant cavity chamber that changes pulse laser is long, the variation of the resonant cavity chamber of pulse laser long variation causing laser output pulse build-up time, the pulse laser settling time that the single-chip microcomputer analysis is relatively successively more adjacent, if pulse laser reduces settling time, then explanation control voltage commands is in the right direction to the long control that changes of resonant cavity, if instead pulse laser increases settling time, then think incorrect, single-chip microcomputer changes the control voltage commands immediately, and then change the long controlling party that changes in resonant cavity chamber to, the pulse build-up time of the pulse laser of maintenance output is all the time near minimum value, thereby stablized the frequency of pulse laser, the pulse build-up time of laser output power maximum is the shortest, and the output laser power also is stabilized near the maximum.
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| CN 200910016663 CN101604815B (en) | 2009-06-26 | 2009-06-26 | Laser frequency-stabilization method for controlling establishing time of pulse laser |
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| CN 200910016663 CN101604815B (en) | 2009-06-26 | 2009-06-26 | Laser frequency-stabilization method for controlling establishing time of pulse laser |
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| CN102163796A (en) * | 2011-03-21 | 2011-08-24 | 中国科学院半导体研究所 | Magnetic control type stabilizing device for output power of all solid-state laser |
| CN102651532A (en) * | 2011-02-25 | 2012-08-29 | 深圳市大族激光科技股份有限公司 | Method and system for generating frequency signal of laser and laser |
| CN104184029A (en) * | 2014-08-15 | 2014-12-03 | 中国科学院上海技术物理研究所 | Frequency locking method used for tunable laser in pulse type laser system |
| CN104534927A (en) * | 2010-05-11 | 2015-04-22 | 上海聚然智能科技有限公司 | Collimation system of common resonator of laser radar and aggressive laser device |
| CN107255742A (en) * | 2017-05-25 | 2017-10-17 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator alternating voltage sensor-based system |
| CN107968683A (en) * | 2017-12-05 | 2018-04-27 | 无锡路通视信网络股份有限公司 | A kind of control circuit and control method of laser optical transmission power |
| CN109038372A (en) * | 2018-10-24 | 2018-12-18 | 山东惠工电气股份有限公司 | Laser far field focuses foreign body eliminating apparatus |
| CN111380805A (en) * | 2020-01-02 | 2020-07-07 | 华中科技大学 | Photoacoustic cell with adjustable resonant frequency and adjusting method |
| CN111830816A (en) * | 2020-06-28 | 2020-10-27 | 南京天朗防务科技有限公司 | Self-adaptive timing method and device |
| CN113945540A (en) * | 2021-10-14 | 2022-01-18 | 中国计量科学研究院 | Tunable differential absorption laser radar frequency stabilization method based on reference source |
| CN114498277A (en) * | 2021-12-31 | 2022-05-13 | 中国科学院空天信息创新研究院 | Narrow linewidth pulse laser frequency stabilizer |
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| JP3443534B2 (en) * | 1998-12-17 | 2003-09-02 | 日本電信電話株式会社 | Atomic frequency standard laser pulse oscillator |
| CN100367579C (en) * | 2005-01-06 | 2008-02-06 | 四川大学 | Double longitudinal mode laser electromagnetic induction heated frequency stabilizing device and frequency stabilizing method thereof |
| JP3969666B2 (en) * | 2005-04-15 | 2007-09-05 | 財団法人電力中央研究所 | Tunable laser device |
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2009
- 2009-06-26 CN CN 200910016663 patent/CN101604815B/en not_active Expired - Fee Related
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| CN104534927A (en) * | 2010-05-11 | 2015-04-22 | 上海聚然智能科技有限公司 | Collimation system of common resonator of laser radar and aggressive laser device |
| CN104534927B (en) * | 2010-05-11 | 2016-03-09 | 上海聚然智能科技有限公司 | The sighting system of laser radar and aggressive laser instrument common resonant device |
| CN102651532A (en) * | 2011-02-25 | 2012-08-29 | 深圳市大族激光科技股份有限公司 | Method and system for generating frequency signal of laser and laser |
| CN102651532B (en) * | 2011-02-25 | 2014-09-10 | 深圳市大族激光科技股份有限公司 | Method and system for generating frequency signal of laser and laser |
| CN102163796A (en) * | 2011-03-21 | 2011-08-24 | 中国科学院半导体研究所 | Magnetic control type stabilizing device for output power of all solid-state laser |
| CN102163796B (en) * | 2011-03-21 | 2012-07-04 | 中国科学院半导体研究所 | Magnetic control type stabilizing device for output power of all solid-state laser |
| CN104184029A (en) * | 2014-08-15 | 2014-12-03 | 中国科学院上海技术物理研究所 | Frequency locking method used for tunable laser in pulse type laser system |
| CN104184029B (en) * | 2014-08-15 | 2017-02-01 | 中国科学院上海技术物理研究所 | Frequency locking method used for tunable laser in pulse type laser system |
| CN107255742A (en) * | 2017-05-25 | 2017-10-17 | 杭州电子科技大学 | A kind of Whispering-gallery-mode optical resonator alternating voltage sensor-based system |
| CN107968683A (en) * | 2017-12-05 | 2018-04-27 | 无锡路通视信网络股份有限公司 | A kind of control circuit and control method of laser optical transmission power |
| CN107968683B (en) * | 2017-12-05 | 2023-07-28 | 无锡路通视信网络股份有限公司 | Control circuit and control method for light emission power of laser |
| CN109038372A (en) * | 2018-10-24 | 2018-12-18 | 山东惠工电气股份有限公司 | Laser far field focuses foreign body eliminating apparatus |
| CN109038372B (en) * | 2018-10-24 | 2024-03-08 | 山东惠工电气股份有限公司 | Laser far-field focusing foreign matter removing device |
| CN111380805A (en) * | 2020-01-02 | 2020-07-07 | 华中科技大学 | Photoacoustic cell with adjustable resonant frequency and adjusting method |
| CN111380805B (en) * | 2020-01-02 | 2021-04-06 | 华中科技大学 | Photoacoustic cell with adjustable resonant frequency and adjusting method |
| CN111830816A (en) * | 2020-06-28 | 2020-10-27 | 南京天朗防务科技有限公司 | Self-adaptive timing method and device |
| CN111830816B (en) * | 2020-06-28 | 2023-05-12 | 南京天朗防务科技有限公司 | Self-adaptive timing method and device |
| CN113945540A (en) * | 2021-10-14 | 2022-01-18 | 中国计量科学研究院 | Tunable differential absorption laser radar frequency stabilization method based on reference source |
| CN114498277A (en) * | 2021-12-31 | 2022-05-13 | 中国科学院空天信息创新研究院 | Narrow linewidth pulse laser frequency stabilizer |
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| CN101604815B (en) | 2011-02-09 |
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