CN105680314A - High-power nanosecond and picosecond pulse fiber laser system - Google Patents
High-power nanosecond and picosecond pulse fiber laser system Download PDFInfo
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- CN105680314A CN105680314A CN201610167952.1A CN201610167952A CN105680314A CN 105680314 A CN105680314 A CN 105680314A CN 201610167952 A CN201610167952 A CN 201610167952A CN 105680314 A CN105680314 A CN 105680314A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10015—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by monitoring or controlling, e.g. attenuating, the input signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1123—Q-switching
- H01S3/117—Q-switching using intracavity acousto-optic devices
Abstract
The invention relates to the technical field of photoelectricity, and provides a high-power nanosecond and picosecond pulse fiber laser system. The high-power nanosecond and picosecond pulse fiber laser system comprises a control circuit system, a drive system, a feedback system, a seed source, an acousto-optic modulator, a pre-amplifier stage, a primary amplifier stage, a pulse signal optical monitor and a power monitor, wherein the control circuit system is connected with the drive system and the feedback system respectively; the seed source, the acousto-optic modulator, the pre-amplifier stage and the primary amplifier stage are connected with the drive system and are controlled by the drive system; the pulse signal optical monitor and the power monitor are connected with the feedback system and transmit signals to the feedback system; the drive system drives the seed source to become pulse signal laser lights through the acousto-optic modulator; a small amount of pulse signal laser lights are transmitted to the pulse signal optical monitor; a large amount of pulse signal laser lights are transmitted to the primary amplifier stage through an optical isolator and the pre-amplifier stage and are output from the optical isolator; meanwhile, a small amount of lights are transmitted to the power monitor; the pulse signal optical monitor and the power monitor transmit the collected signals to the feedback system; and the collected signals are fed back to the control circuit system by the feedback system. Therefore, the technical problems of high-power nanosecond and picosecond pulses are solved; and good effects of high transmission rate and stable signal are achieved.
Description
Technical field
The present invention relates to field of photoelectric technology, espespecially provides a kind of high power nanosecond, Picopulse optical fiber laser system.
Background technology
High power nanosecond, Picopulse optical fiber laser has good beam quality, pulse width is narrow, can material " cold " be burnt, reliability high, be easily integrated and it is without advantages such as complicated maintenances, obtain market more and more to pay close attention to, especially micro-scale material processing field.
In the prior art, the nanosecond of high-peak power, picopulse is obtained mainly through master oscillator-amplification (MOPA) method, seed source MO is generally adopted the semiconductor laser modulation of fast response time to produce the seed light that pulse width is nanosecond, picosecond magnitude, and seed light is injected in amplifier stage PA and is amplified. Although adopting short pulsed drive semiconductor laser can obtain short-pulse laser, but pulse width being narrower, if untreated, pulse stretching, Noise enhancement can be made when amplifying again, limit the raising of peak laser power. Meanwhile, pulse shape is difficult to regulate, anti feedback light ability.
In the long-time use procedure of laser instrument, the device temperature influence such as pumping semiconductor laser there will be power swing, directly influences the stability of laser output power, and laser instrument processing technique same effect, integrity etc. can not reach requirement.
Summary of the invention
For solving above-mentioned technical problem, present invention is primarily targeted at offer a kind of high power nanosecond, Picopulse optical fiber laser system.
For reaching above-mentioned purpose, the technical scheme of present invention application is: provide a kind of high power nanosecond, Picopulse optical fiber laser system, it include control circuit system and respectively connect drive system be connected with feedback system, also include being connected and accept the seed source that drive system controls with drive system, acousto-optic modulator, pre-amplification stage, main amplifier stage and be connected with feedback system and send the pulse light watch-dog of signal and power monitor to feedback system, wherein: drive system drives seed source to export continuous seed laser or output pulse laser, continuous seed light becomes pulse signal laser after acousto-optic modulator, a small amount of optical transport of pulse signal laser arrives pulse light watch-dog, and light is injected into pre-amplification stage through optoisolator in a large number, pass sequentially through narrow band filter again, HONGGUANG male part and main amplifier stage, a large amount of light of main amplifier stage output export from output optoisolator, a small amount of light arrives power monitor, now the signal collected is sent to feedback system and is fed back to control circuit system by feedback system by pulse light watch-dog and power monitor.
Preferred in the present embodiment, seed source is the gain switch type semiconductor laser of quickly response;Drive system produces continuous current and drives seed source continuous signal light, or produces pulse current and drive seed source output pulse signal light, and duration of signal pulse is divided into nanosecond seed source and psec seed source.
Preferred in the present embodiment, seed source includes semiconductor pumping sources, doped fiber, fiber grating and bonder; Drive system drives semiconductor pumping sources to make seed source part produce 1064nm ± 2nm continuous laser, or drives semiconductor pumping sources to make seed source part produce 1064nm ± 2nm nanosecond order pulse laser.
Preferred in the present embodiment, pre-amplification stage includes doped fiber, semiconductor pumping sources and optoisolator, main amplifier stage includes semiconductor pumping sources, double clad gain fibre, bonder and mode adaptation device MFA, and pre-amplification stage adopts forward pumping mode with main amplifier stage.
Preferred in the present embodiment, pre-amplification stage is not limited to single-stage and amplifies, when pre-amplification stage is more than 1 grade, need between level to add optoisolator, or utilize light-splitting device to share a semiconductor pumping sources, same main number of stages of amplification is not limited to single-stage and amplifies, and exports demand according to power, increases main amplifier stage after main amplifier stage.
Preferred in the present embodiment, prevent big level, main amplifier stage to be all not limited to forward pumping mode.
Preferred in the present embodiment, pulse light watch-dog separates a small amount of light for pilot signal light frequency and pulse width by beam splitter; Power monitor separates a small amount of light for laser power monitor by beam splitter.
Preferred in the present embodiment, power monitor includes pigtailed photodiode, and utilizes photodiode to convert the optical signal collected to the corresponding signal of telecommunication.
Preferred in the present embodiment, HONGGUANG male part includes bonder and red diodes.
The present invention compared with prior art, its beneficial effect:
One is high power nanosecond, Picopulse optical fiber laser system employing all optical fiber system, can be effectively improved system reliability and stability;
Two is that high power skin nanosecond, Picopulse optical fiber laser system utilize the pulse width of acousto-optic modulator duty cycle adjustment pulsed light, regulate pulse shape by regulating acousto-optic rising edge, there is the effect of anti feedback light interference simultaneously, improve the reliability of system. Narrow band filter and mode adaptation device improve the beam quality of laser instrument and effectively suppress the nonlinear effect in doped fiber, it is achieved high power nanosecond, picosecond pulse laser output;
Three is the function that high-peak power nanosecond, Picopulse optical fiber laser system have HONGGUANG instruction, thereby improves operability and the safety of system;
Four is the function that high power Picopulse optical fiber laser system has a pulse light real-time monitoring and control and output dynamically regulates.
Accompanying drawing explanation
Fig. 1 is the optical texture schematic diagram of the embodiment of the present invention.
Fig. 2 is the systematic square frame structural representation of the embodiment of the present invention.
Detailed description of the invention
Being 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 the element of same or like function from start to finish. The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining technical scheme, and is not construed as 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, it is for only for ease of the description present invention rather than requires that therefore the present invention with specific azimuth configuration and operation, must be not construed as limitation of the present invention.
Referring to Fig. 1 and combination is consulted shown in Fig. 2, Fig. 2 is the frame structure schematic diagram of high power nanosecond, Picopulse optical fiber laser system. Figure includes seed source 1, acousto-optic modulator 2, pulse light watch-dog 3, optoisolator 4, pre-amplification stage 5, narrow band filter 6, HONGGUANG male part 7, main amplifier stage 8, power monitor 9, output optoisolator 10, circuit control system 11 and drive system 12 and feedback system 13; Wherein: circuit control system 11 is connected with drive system 12 and feedback system 13 respectively,
Circuit control system 11 is connected with drive system 12 and feedback system 13 respectively, and drive system 12 controls seed source 1, acousto-optic modulator 2, pre-amplification stage 5, main amplifier stage 8; Drive system 12 drives seed source 1 to export nanosecond or picosecond magnitude pulse laser; Pulse seed laser fraction light after acousto-optic modulator 2 arrives pulse light watch-dog 3, overwhelming majority light is then through being injected into pre-amplification stage 5 after isolator 4, pass sequentially through narrow band filter 6, HONGGUANG male part 7, main amplifier stage 8 again, most laser of main amplifier stage 8 output export from output optoisolator 10, and small part laser arrives power monitor 9; The signal collected is sent to feedback system 13 by pulse light watch-dog 3 and power monitor 9, feedback system 13 feed back to circuit control system 11; The flashlight frequency collected, pulse width and setting value are contrasted by circuit control system 11, determine that seed source 1 continues or quits work according to comparing result; By the power signal that collects and setting value contrast, increase the pumping current of seed source 1, pre-amplification stage 5 and main amplifier stage 8 according to comparing result by driver element 12 or drive system 12 quits work;
Driver element 12 drives seed source 1 to produce nanosecond or picosecond magnitude pulse laser; Pulse light is divided into two parts by 1:99 beam splitter again by seed laser after acousto-optic modulator 2, and such as Fig. 2, seed source 1 is the gain switch type semiconductor laser of quickly response. The optical maser wavelength of seed light source 1 output is at 1064 ± 2nm; Acousto-optic modulator 2 realizes the adjustment to optical pulse waveform mainly by regulating acousto-optic rising edge, has the effect of anti feedback light simultaneously, increases the optical system reliability in practical application; Seed light sub-fraction light after acousto-optic modulator arrives pulse light watch-dog 3, and pulse light watch-dog 3 is made up of beam splitter 301 and pigtailed photodiode 302, and overwhelming majority light is injected into pre-amplification stage 5 then through optoisolator 4; Pre-amplification stage 5 includes semiconductor pumped former 501, bonder 502, gain fibre 503 and fibre optic isolater 504, adopts forward pumping mode; Pre-amplification stage 5 Output of laser injects main amplifier stage 8 after narrow band filter 6 filters. For improving operability and the safety of system, can adding HONGGUANG male part 7 by 1064/633nmWDM and be coupled into HONGGUANG between wave filter 6 and main amplifier stage 8, HONGGUANG male part 7 is made up of bonder 701, HONGGUANG pipe LD702. Main amplifier stage includes semiconductor pumping sources 801, bonder 802, double clad gain fibre 803 and mode adaptation device MFA804, adopts forward pumping mode. The Output of laser of main amplifier stage 8 is divided into two parts by 1:99 beam splitter, and overwhelming majority laser exports from output optoisolator 10, and small part laser arrives power monitor device 9, and power monitor 9 includes beam splitter 901 and pigtailed photodiode 902.The signal collected is fed back to control circuit system 11 through feedback system 13 by pulse light watch-dog 3 and power monitor 9.
Claims (9)
1. a high power nanosecond, Picopulse optical fiber laser system, including control circuit system and respectively connect drive system be connected with feedback system, also include being connected and accept the seed source that drive system controls with drive system, acousto-optic modulator, pre-amplification stage, main amplifier stage and be connected with feedback system and send the pulse light watch-dog of signal and power monitor to feedback system, it is characterized in that: drive system drives seed source to export continuous seed laser or output pulse laser, continuous seed light becomes pulse signal laser after acousto-optic modulator, a small amount of optical transport of pulse signal laser arrives pulse light watch-dog, and light is injected into pre-amplification stage through optoisolator in a large number, pass sequentially through narrow band filter again, HONGGUANG male part and main amplifier stage, a large amount of light of main amplifier stage output export from output optoisolator, a small amount of light arrives power monitor, now the signal collected is sent to feedback system and is fed back to control circuit system by feedback system by pulse light watch-dog and power monitor.
2. high power nanosecond according to claim 1, Picopulse optical fiber laser system, it is characterised in that: seed source is the gain switch type semiconductor laser of quickly response; Drive system produces continuous current and drives seed source continuous signal light, or produces pulse current and drive seed source output pulse signal light, and duration of signal pulse is divided into nanosecond seed source and psec seed source.
3. high power nanosecond according to claim 2, Picopulse optical fiber laser system, it is characterised in that: seed source includes semiconductor pumping sources, doped fiber, fiber grating and bonder; Drive system drives semiconductor pumping sources to make seed source part produce 1064nm ± 2nm continuous laser, or drives semiconductor pumping sources to make seed source part produce 1064nm ± 2nm nanosecond order pulse laser.
4. high power nanosecond according to claim 3, Picopulse optical fiber laser system, it is characterized in that: pre-amplification stage includes doped fiber, semiconductor pumping sources and optoisolator, main amplifier stage includes semiconductor pumping sources, double clad gain fibre, bonder and mode adaptation device MFA, and pre-amplification stage adopts forward pumping mode with main amplifier stage.
5. high power nanosecond according to claim 4, Picopulse optical fiber laser system, it is characterized in that: pre-amplification stage is not limited to single-stage and amplifies, when pre-amplification stage is more than 1 grade, need between level to add optoisolator, or utilize light-splitting device to share a semiconductor pumping sources, same main number of stages of amplification is not limited to single-stage and amplifies, and exports demand according to power, increases main amplifier stage after main amplifier stage.
6. high power nanosecond according to claim 5, Picopulse optical fiber laser system, it is characterised in that: prevent big level, main amplifier stage to be all not limited to forward pumping mode.
7. high power nanosecond according to claim 6, Picopulse optical fiber laser system, it is characterised in that: pulse light watch-dog separates a small amount of light for pilot signal light frequency and pulse width by beam splitter; Power monitor separates a small amount of light for laser power monitor by beam splitter.
8. high power nanosecond according to claim 7, Picopulse optical fiber laser system, it is characterised in that: power monitor includes pigtailed photodiode, and utilizes photodiode to convert the optical signal collected to the corresponding signal of telecommunication.
9. high power nanosecond according to claim 8, Picopulse optical fiber laser system, it is characterised in that: HONGGUANG male part includes bonder and red diodes.
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| CN201610167952.1A CN105680314A (en) | 2016-03-23 | 2016-03-23 | High-power nanosecond and picosecond pulse fiber laser system |
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| CN201610167952.1A CN105680314A (en) | 2016-03-23 | 2016-03-23 | High-power nanosecond and picosecond pulse fiber laser system |
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Cited By (7)
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| CN106451043A (en) * | 2016-10-31 | 2017-02-22 | 武汉锐科光纤激光技术股份有限公司 | 200W nanosecond pulsed optical fiber laser system |
| CN108051182A (en) * | 2017-11-07 | 2018-05-18 | 扬州莱达光电技术有限公司 | A kind of laser subsystem integral test system |
| CN108471043A (en) * | 2018-04-27 | 2018-08-31 | 国科世纪激光技术（天津）有限公司 | Acousto-optic Q modulation solid state laser and control method |
| CN109687270A (en) * | 2019-01-29 | 2019-04-26 | 深圳市杰普特光电股份有限公司 | Optical fiber laser |
| CN110190495A (en) * | 2019-06-11 | 2019-08-30 | 深圳市创鑫激光股份有限公司 | The high power single fiber of closed-loop control exports continuous full-optical-fiber laser system |
| CN111952830A (en) * | 2020-07-21 | 2020-11-17 | 大族激光科技产业集团股份有限公司 | Nanosecond seed source and double-pulse-width optical fiber laser |
| CN114465079A (en) * | 2022-01-26 | 2022-05-10 | 中国电子科技集团公司第十一研究所 | Narrow-linewidth pulse fiber laser and control method thereof |
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| CN106451043A (en) * | 2016-10-31 | 2017-02-22 | 武汉锐科光纤激光技术股份有限公司 | 200W nanosecond pulsed optical fiber laser system |
| CN108051182A (en) * | 2017-11-07 | 2018-05-18 | 扬州莱达光电技术有限公司 | A kind of laser subsystem integral test system |
| CN108051182B (en) * | 2017-11-07 | 2020-02-21 | 扬州科莱光电技术有限公司 | Laser subsystem comprehensive test equipment |
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| CN110190495A (en) * | 2019-06-11 | 2019-08-30 | 深圳市创鑫激光股份有限公司 | The high power single fiber of closed-loop control exports continuous full-optical-fiber laser system |
| WO2020248929A1 (en) * | 2019-06-11 | 2020-12-17 | 苏州创鑫激光科技有限公司 | Closed-loop control high-power single-fiber output continuous all-fiber laser system |
| CN111952830A (en) * | 2020-07-21 | 2020-11-17 | 大族激光科技产业集团股份有限公司 | Nanosecond seed source and double-pulse-width optical fiber laser |
| CN114465079A (en) * | 2022-01-26 | 2022-05-10 | 中国电子科技集团公司第十一研究所 | Narrow-linewidth pulse fiber laser and control method thereof |
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Application publication date: 20160615 |