CN105024262A - Waveform-adjustable high-power pulse fiber laser - Google Patents
Waveform-adjustable high-power pulse fiber laser Download PDFInfo
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- CN105024262A CN105024262A CN201410174545.4A CN201410174545A CN105024262A CN 105024262 A CN105024262 A CN 105024262A CN 201410174545 A CN201410174545 A CN 201410174545A CN 105024262 A CN105024262 A CN 105024262A
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Abstract
The present invention discloses a waveform-adjustable high-power pulse fiber laser. The fiber laser comprises an optical path assembly used for providing seed pulses and amplifying output, a drive assembly used for driving laser pulses, and a control assembly used for detecting and adjusting laser pulse output. In a working process of the waveform-adjustable high-power pulse fiber laser, a laser working repetition frequency is automatically detected through a frequency detection module, so as to adjust the amplitude and the pulse width of a working signal waveform of a seed pulse module and enveloped one or more parameters, thereby ensuring that a high-power optical fiber laser can obtain an excellent effective single pulse energy under different repetition frequencies, thereby obtaining an excellent application effect.
Description
Technical field
The present invention relates to field of laser device technology, particularly relate to a kind of high power pulse optical fiber laser of adjustable waveform.
Background technology
High-capacity optical fiber laser possesses good beam quality, life-span length, conversion efficiency advantages of higher, has important, irreplaceable application in the field such as optical-fibre communications field, laser processing.
Main application in the market has the fiber laser adjusting the types such as Q, locked mode, MOPA, but tune Q, locked mode are not easy the adjustment realizing frequency Pulse Width, thus limit range of application.For existing MOPA technology, amplify the impacts such as rear gain saturation due to it and make its waveform change, thus cause effective single pulse energy to reduce, and then reduce effective usability of light pulse.
For high-power fiber pulse laser of the prior art, there is open defect in environmental protection and effective use, therefore need to be improved it.
Summary of the invention
The technical problem to be solved in the present invention is to overcome prior art defect, provides a kind of high power pulse optical fiber laser of adjustable waveform.
Technical scheme of the present invention comprises a kind of high power pulse optical fiber laser of adjustable waveform, for providing seed pulse and amplifying the optical path component exported, for the driven unit of driving laser pulse, for the control assembly detected and regulate laser pulse to export; Wherein, described control assembly comprises frequency detection module, waveform adjustment module, seed pulse control module and amplifies control module; Described frequency detection module detects the repetition rate of pulse optical fiber, described waveform adjustment module regulates the one or more parameters in the amplitude of the working signal waveform of seed laser, pulsewidth and envelope according to repetition rate testing result, makes pulse optical fiber obtain better single pulse energy effective rate of utilization.
Preferably, described control assembly also comprises waveform detection module; Described waveform detection module detects the single pulse energy effective rate of utilization of the output pulse of pulse optical fiber in real time, described waveform adjustment module regulates the one or more parameters in the amplitude of seed signal waveform, pulsewidth and envelope in real time according to frequency detection module and waveform detection module testing result, makes the single pulse energy effective rate of utilization of the high power pulse optical fiber laser of adjustable waveform keep default S in real time
0value.
Preferably, the described optical path component pulse amplification output module that amplifies and export that comprises seed pulse module and seed pulse module is exported; Described driven unit comprises for driving the seed pulse driver module of described seed pulse module and for driving the amplification driver module of described amplification output module.
Preferably, described seed pulse module comprises seed laser, the first isolator, the first amplifier, the second isolator arranged successively along light path.
Preferably, described first amplifier comprises the first amplifying fiber and the first pump combiner, described first isolator, the first amplifying fiber, the first pump combiner, the second isolator are arranged successively along light path, and described first pump combiner connects the first pump laser.
Preferably, described first pump laser centre wavelength is 915-980nm, and described first amplifying fiber is active single cladded fiber, doubly clad optical fiber or multi-clad.
Preferably, described amplification output module comprises the second amplifying fiber, the second pump combiner and the 3rd isolator arranged successively along light path, and described second pump combiner connects the second pump laser.
Preferably, described second pump laser centre wavelength is 915-980nm, and described second amplifying fiber is active single cladded fiber, doubly clad optical fiber or multi-clad.
Preferably, described 3rd isolator is the high-power isolator exported with collimation, and the output of described 3rd isolator is the output of described pulse optical fiber.
Preferably, described waveform adjustment module comprises amplitude adjusting elements, pulse-width regulated unit and envelope adjustment unit, is respectively used to the amplitude of impulse waveform, pulsewidth, envelope regulate.
Beneficial effect of the present invention comprises: the high power pulse optical fiber laser of adjustable waveform in the course of the work, the repetition rate of the continuous detection laser work of frequency detection module, simultaneously the result that detects according to frequency detection module of waveform adjustment module constantly regulates the one or more parameters in the amplitude of the working signal waveform of seed laser, pulsewidth and envelope, can ensure that high-capacity optical fiber laser all can obtain better single pulse energy effective rate of utilization in different repetition rate situation whereby, thus the effect that is well used.
Further in a preferred approach, by adopting waveform detection module, laser is in the course of the work by the repetition rate of the automatic detection laser work of frequency detection module, simultaneously by the function of the single pulse energy effective rate of utilization of the pulse of detection laser in real time after amplifying of waveform detection module, one or more parameters in amplitude, pulsewidth and envelope in seed laser work wave in laser are regulated, makes the single pulse energy effective rate of utilization of the high power pulse optical fiber laser of adjustable waveform keep default S in real time
0value, thus obtain better effect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the high power pulse optical fiber laser of one embodiment of the invention.
Fig. 2 is the control assembly schematic diagram of the high power pulse optical fiber laser of one embodiment of the invention.
Fig. 3 is the control assembly schematic diagram of the high power pulse optical fiber laser of one embodiment of the invention.
Fig. 4 is the seed pulse module diagram of the high power pulse optical fiber laser of one embodiment of the invention.
Fig. 5 is the amplification output module schematic diagram of the high power pulse optical fiber laser of one embodiment of the invention.
Fig. 6 is the waveform adjustment module diagram of the high power pulse optical fiber laser of one embodiment of the invention.
Fig. 7 is the high power single pulse shape figure of the high power pulse optical fiber laser of one embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the present invention is described in further detail.Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining technical scheme of the present invention, and not should be understood to limitation of the present invention.
In describing the invention, term " interior ", " outward ", " longitudinal direction ", " transverse direction ", " on ", D score, " top ", the orientation of the instruction such as " end " or position relationship be based on orientation shown in the drawings or position relationship, be only the present invention for convenience of description instead of require that the present invention with specific azimuth configuration and operation, therefore must not should be understood to limitation of the present invention.
As shown in Figures 1 to 6, provide the high power pulse optical fiber laser that a kind of single pulse energy is adjustable, this high power pulse optical fiber laser 1000 comprises optical path component 300, driven unit 200, control assembly 100.Optical path component 300 exports for providing seed pulse and amplifying, and driven unit 200 is for driving laser pulse, and control assembly 100 is for detecting and regulating laser pulse to export.
As shown in Figure 2, control assembly 100 comprises frequency detection module 110, waveform adjustment module 120, seed pulse control module 130 and amplifies control module 140; Frequency detection module 110 detects the repetition rate of pulse optical fiber, and waveform adjustment module 120 is according to the waveform adjustment of repetition rate testing result to the working signal of seed laser.
As shown in Figure 7, pulse energy is area 41 and area 42 summation, wherein area 41 is effective single pulse energy, area 42 is invalid single pulse energy, dotted line 43 is threshold peak power when laser is applied, when peak power is invalid single pulse energy 42 lower than threshold peak power 43, peak power is effective single pulse energy 41 higher than threshold power 43.In order to ensure the utilance of high power single pulse optical fiber, needing to improve effective single pulse energy, reducing invalid single pulse energy, namely improve the value of effective rate of utilization S=area 41/ (area 41+ area 42).
The high power pulse optical fiber laser 1000 of adjustable waveform of the present invention in the course of the work, the repetition rate of the continuous detection laser work of frequency detection module 110, simultaneously the result that detects according to frequency detection module 110 of waveform adjustment module 120 constantly regulates the one or more parameters in the amplitude of seed laser 311 working signal waveform, pulsewidth and envelope, can ensure that high-capacity optical fiber laser all can obtain better single pulse energy effective rate of utilization S value in different repetition rate situation whereby, thus the effect that is well used.
Embodiment 1
As shown in Figure 3, control assembly 100 also comprises waveform detection module 150; The single pulse energy effective rate of utilization of waveform detection module 150 in real time detection laser pulse after amplifying, waveform adjustment module 120 regulates the one or more parameters in the amplitude of seed signal waveform, pulsewidth and envelope in real time according to frequency detection module 110 and waveform detection module 150 testing result.
The high power pulse optical fiber laser 1000 adjustable for guarantee waveform keeps laser to preset S veritably, in real time
0value, the repetition rate that the frequency detection module 110 of the high power pulse optical fiber laser 1000 that waveform is adjustable constantly to detect seed laser 311 and works, waveform adjustment module 120 makes the waveform of the working signal of seed laser 311 regulate accordingly along with the change of repetition rate, the single pulse energy effective rate of utilization that waveform detection module 150 constantly detection laser amplification in real time exports under this work repetition rate, the change of the single pulse energy effective rate of utilization that waveform adjustment module 120 makes the waveform of the working signal of seed laser 311 detect along with waveform detection module 150 and regulating accordingly, make the pulse of seed pulse module 310 enter whereby and amplify output module 320, the optical pulse shape exported regulates in real time along with the change of the single pulse energy effective rate of utilization detected, ensure that this pulse optical fiber 1000 keeps laser to preset S in real time
0value.
On above-mentioned high power pulse optical fiber laser or embodiment 1 basis, optical path component 300 comprises seed pulse module 310 and seed pulse module is exported to the amplification output module 320 of pulse amplifying; Driven unit 200 comprises for driving the seed pulse driver module 210 of seed pulse module and the amplification driver module 220 for drive amplification output module.
Further, as shown in Figure 4, seed pulse module 310 comprises seed laser 311, first isolator 312, first amplifier 313, second isolator 314 arranged successively along light path.
First amplifier 313 comprises the first amplifying fiber and the first pump combiner, and the first isolator, the first amplifying fiber, the first pump combiner, the second isolator are arranged successively along light path, and the first pump combiner connects the first pump laser.Further can be preferred, the first pump laser centre wavelength is 915-980nm, and the first amplifying fiber is active single cladded fiber, doubly clad optical fiber or multi-clad.
As shown in Figure 5, amplify output module 320 and comprise second amplifying fiber 321, second pump combiner 322 of arranging successively along light path and the 3rd isolator 324, second pump combiner 322 connects the second pump laser 323.Further can be preferred, the second pump laser 323 centre wavelength is 915-980nm, and the second amplifying fiber 321 is active single cladded fiber, doubly clad optical fiber or multi-clad.
3rd isolator 324 is the high-power isolator exported with collimation, and the output of the 3rd isolator 324 is the output of pulse optical fiber.
On above-mentioned high power pulse optical fiber laser or embodiment 1 basis, as Figure 1-5, seed pulse control module 130 drives seed laser 311 and the first amplifier 313 by controlling seed pulse driver module 210, the first pump laser in further control first amplifier, produce the pulse laser of 0.2 ~ 500ns, its power is 1 ~ 10mW, it is after the first isolator 312 and the first amplifier 313, just can obtain the pulse laser after power amplification, export through the second isolator 314.Wherein, the second isolator 314 is high power isolating device, and its output is as the output of seed pulse module 310.
Amplifying control module 140 drives the second pump laser the 323, three isolator 324 to be high-power isolating device by controlling to amplify driver module 220, exports and is with alignment function, ensure that the collimation of high-power laser pulse exports as amplification output module 320.Further, N number of amplifier section can be had in this module, the 3rd amplifying fiber, the 4th amplifying fiber can be had particularly ... N amplifying fiber, the third-largest pump combiner and the 4th pump combiner ... N pump combiner, the 4th isolator ... N isolator etc., wherein the third-largest pump combiner and the 4th pump combiner ... N pump combiner is connected to the 3rd pumping, the 4th pumping ... N pumping.
The scheme implementation process of high power pulse optical fiber laser control assembly of the present invention is: seed laser 311 controls through seed pulse control module 130, waveform adjustment module 120 provides working signal waveform and seed pulse driver module 210 to provide drives, producing average power is the pulse laser of 1 ~ 10mW, it is after the first isolator 312 and the first amplifier 313, obtain the pulse laser after power amplification, in the process, frequency detection module 110 constantly detects the repetition rate of superpower laser 1000, waveform adjustment module 120 regulates the working signal waveform of seed laser 311 automatically according to frequency values, the output pulse shape of seed laser 311 is regulated accordingly along with the change of frequency, seed pulse is avoided to become more and more point after output module 320 cause the effective rate of utilization of single pulse energy to reduce through amplifying, thus ensure that superpower laser 1000 is in the operating frequency range being less than 1G, there is good single pulse energy effective rate of utilization S value.
The scheme implementation process of employing embodiment 1 control assembly is: seed laser 311 controls through seed pulse control module 130, waveform adjustment module 120 provides working signal waveform and seed pulse driver module 210 to provide drives, producing average power is the pulse laser of 1 ~ 10mW, it is after the first isolator 312 and the first amplifier 313, obtain the pulse laser after power amplification, in the process, frequency detection module 110 constantly detects the repetition rate of superpower laser 1000, waveform adjustment module 120 regulates the working signal waveform of seed laser 311 automatically according to frequency values, the output pulse shape of seed laser 311 is regulated accordingly along with the change of frequency, under this work repetition rate, waveform detection module 150 detects the single pulse energy effective rate of utilization of amplifying and exporting afterpulse laser in real time, waveform adjustment module 120 is according to detecting that single pulse energy effective rate of utilization regulates the working signal waveform of seed laser 311 in real time automatically, seed pulse shape is regulated in real time along with the change of single pulse energy effective rate of utilization, thus ensure that this pulse optical fiber 1000 keeps laser to preset S in real time
0value.
As shown in Figure 6, in above-described embodiment, can preferably, waveform adjustment module 120 comprises amplitude adjusting elements 1201, pulse-width regulated unit 1202 and envelope adjustment unit 1203, is respectively used to the amplitude of impulse waveform, pulsewidth, envelope regulate.
The pulse optical fiber 1000 of the embodiment of the present invention can reach following technical standard:
Pulse repetition frequency <1Ghz; Pulse duration 0.2ns-500ns is adjustable; Pulse energy 3mJ; Operation wavelength: 1055nm-1070nm.When laser works is under different repetition rates, all automatically regulate by laser, select suitable waveform, ensure that laser works under different repetition rate and all can realize best effectively single pulse energy, thus more effectively utilize the pulse energy of laser, the related application such as Laser Micro-Machining, laser acquisition and research can be widely used in.
The above the specific embodiment of the present invention, does not form limiting the scope of the present invention.Any various other done by technical conceive of the present invention change and distortion accordingly, all should be included in the protection range of the claims in the present invention.
Claims (10)
1. a high power pulse optical fiber laser for adjustable waveform, is characterized in that, comprising: for providing seed pulse and amplifying the optical path component exported, for the driven unit of driving laser pulse, for the control assembly detected and regulate laser pulse to export;
Wherein, described control assembly comprises frequency detection module, waveform adjustment module, seed pulse control module and amplifies control module; Described frequency detection module detects the repetition rate of pulse optical fiber, described waveform adjustment module regulates the one or more parameters in amplitude, pulsewidth and the envelope in the working signal waveform of seed laser according to the testing result of frequency detection module, makes the high power pulse optical fiber laser of adjustable waveform obtain better single pulse energy effective rate of utilization.
2. high power pulse optical fiber laser as claimed in claim 1, it is characterized in that, described control assembly also comprises waveform detection module; Described waveform detection module detects the single pulse energy effective rate of utilization of the output pulse of pulse optical fiber in real time, described waveform adjustment module regulates the one or more parameters in the amplitude of the working signal waveform of seed laser, pulsewidth and envelope in real time according to frequency detection module and waveform detection module testing result, makes the single pulse energy effective rate of utilization of the high power pulse optical fiber laser of adjustable waveform keep default S in real time
0value.
3. high power pulse optical fiber laser as claimed in claim 1 or 2, is characterized in that, described optical path component comprises seed pulse module and seed pulse module exported to the amplification output module of pulse amplifying; Described driven unit comprises for driving the seed pulse driver module of described seed pulse module and for driving the amplification driver module of described amplification output module.
4. high power pulse optical fiber laser as claimed in claim 3, it is characterized in that, described seed pulse module comprises seed laser, the first isolator, the first amplifier, the second isolator arranged successively along light path.
5. high power pulse optical fiber laser as claimed in claim 4, it is characterized in that, described first amplifier comprises the first amplifying fiber and the first pump combiner, described first isolator, the first amplifying fiber, the first pump combiner, the second isolator are arranged successively along light path, and described first pump combiner connects the first pump laser.
6. high power pulse optical fiber laser as claimed in claim 5, it is characterized in that, described first amplifying fiber is active single cladded fiber, doubly clad optical fiber or multi-clad.
7. high power pulse optical fiber laser as claimed in claim 3, it is characterized in that, described amplification output module comprises the second amplifying fiber, the second pump combiner and the 3rd isolator arranged successively along light path, and described second pump combiner connects the second pump laser.
8. high power pulse optical fiber laser as claimed in claim 7, it is characterized in that, described second amplifying fiber is active single cladded fiber, doubly clad optical fiber or multi-clad.
9. high power pulse optical fiber laser as claimed in claim 7, is characterized in that, described 3rd isolator is the high-power isolator exported with collimation, and the output of described 3rd isolator is the output of described pulse optical fiber.
10. high power pulse optical fiber laser as claimed in claim 1 or 2, it is characterized in that, described waveform adjustment module comprises amplitude adjusting elements, pulse-width regulated unit and envelope adjustment unit, is respectively used to the amplitude of impulse waveform, pulsewidth, envelope regulate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410174545.4A CN105024262A (en) | 2014-04-28 | 2014-04-28 | Waveform-adjustable high-power pulse fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410174545.4A CN105024262A (en) | 2014-04-28 | 2014-04-28 | Waveform-adjustable high-power pulse fiber laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946895A (en) * | 2016-10-12 | 2018-04-20 | 深圳大学 | Laser energy stability device and its antihunt means |
| CN112582870A (en) * | 2020-12-01 | 2021-03-30 | 上海飞博激光科技有限公司 | High-power all-fiber pulse fiber laser system |
| CN113545843A (en) * | 2021-07-20 | 2021-10-26 | 广州迪光医学科技有限公司 | Laser ablation system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090080467A1 (en) * | 2007-09-24 | 2009-03-26 | Andrei Starodoumov | Pulse repetition frequency-multipler for fiber lasers |
| CN102255229A (en) * | 2011-06-01 | 2011-11-23 | 深圳市创鑫激光技术有限公司 | High-power pulse optical fiber laser with adjustable pulse width |
| CN103022862A (en) * | 2012-12-03 | 2013-04-03 | 广东汉唐量子光电科技有限公司 | Random waveform nanosecond pulse high-fidelity amplifying device |
| CN203839697U (en) * | 2014-04-28 | 2014-09-17 | 深圳激扬光电有限公司 | Waveform adjustable high-power pulse fiber laser |
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2014
- 2014-04-28 CN CN201410174545.4A patent/CN105024262A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090080467A1 (en) * | 2007-09-24 | 2009-03-26 | Andrei Starodoumov | Pulse repetition frequency-multipler for fiber lasers |
| CN102255229A (en) * | 2011-06-01 | 2011-11-23 | 深圳市创鑫激光技术有限公司 | High-power pulse optical fiber laser with adjustable pulse width |
| CN103022862A (en) * | 2012-12-03 | 2013-04-03 | 广东汉唐量子光电科技有限公司 | Random waveform nanosecond pulse high-fidelity amplifying device |
| CN203839697U (en) * | 2014-04-28 | 2014-09-17 | 深圳激扬光电有限公司 | Waveform adjustable high-power pulse fiber laser |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946895A (en) * | 2016-10-12 | 2018-04-20 | 深圳大学 | Laser energy stability device and its antihunt means |
| CN112582870A (en) * | 2020-12-01 | 2021-03-30 | 上海飞博激光科技有限公司 | High-power all-fiber pulse fiber laser system |
| CN113545843A (en) * | 2021-07-20 | 2021-10-26 | 广州迪光医学科技有限公司 | Laser ablation system and method |
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Application publication date: 20151104 |