CN110474227A - A kind of short-pulse laser system and control method based on Burst mode - Google Patents
A kind of short-pulse laser system and control method based on Burst mode Download PDFInfo
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- CN110474227A CN110474227A CN201910759984.4A CN201910759984A CN110474227A CN 110474227 A CN110474227 A CN 110474227A CN 201910759984 A CN201910759984 A CN 201910759984A CN 110474227 A CN110474227 A CN 110474227A
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/0912—Electronics or drivers for the pump source, i.e. details of drivers or circuitry specific for laser pumping
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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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
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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
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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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
- H01S3/10061—Polarization control
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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
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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
- H01S3/1123—Q-switching
- H01S3/115—Q-switching using intracavity electro-optic devices
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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
- H01S3/1123—Q-switching
- H01S3/117—Q-switching using intracavity acousto-optic devices
Abstract
The embodiment of the present invention provides a kind of short-pulse laser system and control method based on Burst mode, including outer control circuit, light generation grade module, pattern matcher and light amplification grade module, wherein: outer control circuit, for generating trigger signal, and light generation grade module is sent by trigger signal, for controlling light generation grade module；Wherein, trigger signal is pulse electrical signal, including pump triggering signal and tune Q trigger signal；Light generation grade module, for generating narrow-pulse laser according to the trigger signal received；Pattern matcher is adjusted for the size to narrow-pulse laser, and sends light amplification grade module for the narrow-pulse laser after size adjusting；Light amplification grade module generates the short-pulse laser based on Burst mode for amplifying processing to the narrow-pulse laser after size adjusting.The embodiment of the present invention can under a wide range of work repetition, keep short-pulse laser string stablize output, and pulse width approximation stablize it is constant.
Description
Technical field
The present invention relates to laser technology field more particularly to a kind of short-pulse laser system based on Burst mode and
Control method.
Background technique
In existing laser, high-gain tune Q solid subnanosecond laser device has output peak power high and stability
Good advantage, is all widely used in fields such as retrofit, biologic medical and spectrum analyses.But due to high-gain solid tune Q
Laser itself heat production is high, and gain regions internal heat effect problem is serious, limits it and further applies.
In order to improve laser heat performance, most of high-gain solid q-switched laser takes low repetition pulse pump to work,
Or the mode of limiting gain area pump power density, cause the Gao Zhongying application of short pulse to be restricted.Also, swash in adjustment
When light device work repetition, Q-switched laser pulsewidth generally can significantly broaden as repetition rises, this is also to Gao Zhongying tune Q
The use of laser brings adverse effect.
Therefore, it needs now a kind of above-mentioned to solve based on the short-pulse laser system of Burst mode and control method
Problem.
Summary of the invention
In view of the problems of the existing technology, the embodiment of the present invention provides a kind of short-pulse laser based on Burst mode
Device system and control method.
In a first aspect, the embodiment of the invention provides a kind of short-pulse laser system based on Burst mode, including it is outer
Control circuit, light generation grade module, pattern matcher and light amplification grade module, in which:
The output port of the outer control circuit connects the input port of the light generation grade module, for generating triggering letter
Number, and the light generation grade module is sent by the trigger signal, for controlling the light generation grade module；Wherein, institute
Stating trigger signal is pulse electrical signal, including pump triggering signal and tune Q trigger signal；
The light generation grade module, for generating narrow-pulse laser according to the trigger signal received；
The entering light side of the pattern matcher is arranged in after the light emission side of the light generation grade module, for described narrow
The size of pulse laser is adjusted, and sends the light amplification grade module for the narrow-pulse laser after size adjusting；
The entering light side of the light amplification grade module is arranged in after the light emission side of the pattern matcher, for size tune
Narrow-pulse laser after whole amplifies processing, generates the short-pulse laser based on Burst mode.
Further, the light generation grade module includes oscillator stage pumping source, oscillator stage gain media and Q-switching device,
In:
The oscillator stage pumping source, for executing the control instruction of the pump triggering signal, by oscillator stage pumping pulse
It is emitted to the oscillator stage gain media；
The oscillator stage gain media, for providing gain regions for oscillator stage pumping pulse；
The Q-switching device, for carrying out tune Q to the oscillator stage pumping pulse after gain according to the tune Q trigger signal,
To obtain narrow-pulse laser.
Further, the pattern matcher includes coupled lens and faraday isolator, in which:
The entering light side of the coupled lens is arranged in after the light emission side of the light generation grade module, for swashing to burst pulse
The size of light is adjusted, so that the amplifying stage of the narrow-pulse laser and the light amplification grade module after size adjusting pumps arteries and veins
Rush in capable matching；
The faraday isolator is arranged in after the light emission side of the coupled lens, for the light amplification grade mould to be isolated
The laser that block optical surface returns.
Further, the pattern matcher further includes a quarter slide, and a quarter slide is arranged described
After faraday isolator output end, it is adjusted for the polarization state to narrow-pulse laser.
Further, the light amplification grade module includes the first light amplification grade module and the second light amplification grade module, in which:
The first light amplification grade module and the second light amplification grade block coupled in series, the first light amplification grade module
Entering light, which flanks, receives the narrow-pulse laser that the pattern matcher is propagated, so that the narrow-pulse laser successively passes through described first
Light amplification grade module and the second light amplification grade module amplify processing, obtain the short-pulse laser based on Burst mode.
Further, the Q-switching device is that electro-optic Q switch or acousto-optic Q modulation switch.
Further, the oscillator stage pumping source is diode laser or Bar laser.
Second aspect, the embodiment of the invention provides it is a kind of based on described in first aspect based on the short arteries and veins of Burst mode
Rush the control method of Optical Maser System, comprising:
It obtains pump triggering signal and adjusts Q trigger signal, to obtain narrow-pulse laser；
The size of the narrow-pulse laser is adjusted, the narrow-pulse laser after obtaining size adjusting；
Processing is amplified to the narrow-pulse laser after size adjusting, generates the short-pulse laser based on Burst mode.
The third aspect, the embodiment of the present invention provides a kind of electronic equipment, including memory, processor and is stored in memory
Computer program that is upper and can running on a processor, is realized when the processor executes described program as second aspect provides
Method the step of.
Fourth aspect, the embodiment of the present invention provide a kind of non-transient computer readable storage medium, are stored thereon with calculating
Machine program is realized as provided by second aspect when the computer program is executed by processor the step of method.
A kind of short-pulse laser system and control method based on Burst mode provided in an embodiment of the present invention, is compared
The prior art can keep short-pulse laser string to stablize output, and pulse width approximation is stablized not under a wide range of work repetition
Become, improves the stability of laser.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of the short-pulse laser system provided in an embodiment of the present invention based on Burst mode；
Fig. 2 is the structural schematic diagram of light generation grade module provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of pattern matcher provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of light amplification grade module provided in an embodiment of the present invention；
Fig. 5 is that the overall structure of the short-pulse laser system provided in an embodiment of the present invention based on Burst mode is illustrated
Figure；
Fig. 6 is the process of the short-pulse laser system control method provided in an embodiment of the present invention based on Burst mode
Schematic diagram；
Fig. 7 is the waveform diagram of trigger signal provided in an embodiment of the present invention；
Fig. 8 is the relationship signal of single pulse width data of the work provided in an embodiment of the present invention under different repetitions
Figure；
Fig. 9 is electronic devices structure schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Under Burst mode, adjust Q that can arbitrarily adjust laser in the case where fuel factor is controllable without cavity laser
Work repetition.Since Burst mode working principle is still to couple control laser output with Q trigger signal is adjusted by pumping, only
It is to reduce crystals heat production by way of interruption pumping；And due to the configuration of no cavity laser, exporting pulse can be protected
It is constant to hold pulsewidth approximation, therefore, the work for facilitating to solve current high-gain laser without cavity laser under Burst mode
The low problem of repetition.Short-pulse laser system and control method provided in an embodiment of the present invention based on Burst mode solves
The limited problem of high-gain laser work repetition realizes the short-pulse laser output of magnitude of subnanosecond, can obtain stability
Good, pulse width, work repetition are adjustable on a large scale and do not influence the Burst laser pulse of output pulse width, have and are widely applied.
Fig. 1 is the structural schematic diagram of the short-pulse laser system provided in an embodiment of the present invention based on Burst mode, such as
Shown in Fig. 1, the embodiment of the invention provides a kind of short-pulse laser systems based on Burst mode, including outer control circuit
101, light generation grade module 102, pattern matcher 103 and light amplification grade module 104, in which:
The output port of the outer control circuit 101 connects the input port of the light generation grade module 102, for generating
Trigger signal, and the light generation grade module 102 is sent by the trigger signal, for controlling the light generation grade module
102；Wherein, the trigger signal is pulse electrical signal, including pump triggering signal and tune Q trigger signal；
The light generation grade module 102, for generating narrow-pulse laser according to the trigger signal received；
The entering light side of the pattern matcher 103 is arranged in after the light emission side of the light generation grade module 102, for pair
The size of the narrow-pulse laser is adjusted, and sends the light amplification grade module for the narrow-pulse laser after size adjusting
104；
The entering light side of the light amplification grade module 104 is arranged in after the light emission side of the pattern matcher 103, for pair
Narrow-pulse laser after size adjusting amplifies processing, generates the short-pulse laser based on Burst mode.
In embodiments of the present invention, outer control circuit 101, light generation grade module 102, pattern matcher 103 and light amplification
Grade module 104 is sequentially connected setting, and outer control circuit 101 generates two adjustable pulse electrical signals of delay, i.e. trigger signal, uses
Pumping and Q-switching device in control light generation grade module 102 need so that laser works mode is Burst mode
Bright, the sequential logic of two kinds of pulse electrical signals can pass through field programmable gate array (Field Programmable
Gate Array, abbreviation FPGA) it is controlled.It, can also be in addition, outer control circuit 101 can be double-channel signal generator
It is the circuit by FPGA design, the present invention is not especially limit this.Preferably, in embodiments of the present invention, outside
Control circuit is also connected with temperature control modules, is monitored control for the temperature to oscillator stage pumping source.
Further, after outer control circuit 101 sends trigger signal to light generation grade module 102, light generation grade mould
Oscillator stage pumping source in block 102 executes the control instruction of pump triggering signal, generates the longer pumping pulse of low frequency；Light vibration
The Q-switch in grade module 102 is swung after the start-up operation of oscillator stage pumping source, is executed the control instruction for adjusting Q trigger signal, is led to
It crosses and opens multiple Q-switch, the laser Q-switching pulse of high-frequency narrow spaces is generated, so that multiple laser Q-switching pulse shapings one
Long envelope (frequency is the corresponding frequency of pump triggering signal), to form narrow-pulse laser.Specifically, in the embodiment of the present invention
In, oscillator stage pumping source can focus stronger degree, for example, pumping beam waist radius is focused to 100 to 150 microns, to improve
The gain effect of pumped region, facilitates spontaneous radiation effect (the Amplified spontaneous by being amplified
Emission, abbreviation ASE) obtain narrow-pulse laser；In addition, since the oscillator stage pumping source in light generation grade module 102 has
Lesser duty ratio, so that fuel factor is controlled in lower degree.
Further, after light generation grade module 102 generates narrow-pulse laser, by pattern matcher 103, by narrow arteries and veins
It is consistent with the amplifying stage pumping pulse size that light amplification grade module 104 generates that the spot size of impulse light is adjusted to, and then leads to again
It crosses light amplification grade module 104 and power amplification is carried out to the narrow-pulse laser after size adjusting, to obtain based on Burst mode
Short-pulse laser.It should be noted that in embodiments of the present invention, the image intensifer type in light amplification grade module 104 can
Think solid laser amplifier, optical fiber laser amplifier or semiconductor laser amplifier.
A kind of short-pulse laser system based on Burst mode provided in an embodiment of the present invention compared with prior art can
Under a wide range of work repetition, short-pulse laser string is kept to stablize output, and pulse width approximation is stablized constant, improves laser
The stability of device.
On the basis of the above embodiments, the light generation grade module includes oscillator stage pumping source, oscillator stage gain media
And Q-switching device, in which:
The oscillator stage pumping source, for executing the control instruction of the pump triggering signal, by oscillator stage pumping pulse
It is emitted to the oscillator stage gain media；
The oscillator stage gain media, for providing gain regions for oscillator stage pumping pulse；
The Q-switching device, for carrying out tune Q to the oscillator stage pumping pulse after gain according to the tune Q trigger signal,
To obtain narrow-pulse laser.
Fig. 2 is the structural schematic diagram of light generation grade module provided in an embodiment of the present invention, be can refer to shown in Fig. 2, in this hair
In bright embodiment, the oscillator stage pumping pulse that oscillator stage pumping source 201 is launched passes sequentially through oscillator stage pump coupling along optical axis
Unit 202, and the dichroic mirror 203 being arranged with optical axis in 45 degree of angles and then the gain for passing through oscillator stage gain media 204,
And Q-switching device 205 and Effect of Back-Cavity Mirror 206.Wherein, the pump mode of light generation grade module makes pulsed, oscillator stage pumping source 201
It can be the diode laser of fiber coupling output, oscillator stage pump coupling unit 202 can be collimation focus lens group.In
After oscillator stage pumping pulse is focused through oscillator stage pump coupling unit 202, across the transparent side of dichroic mirror, reaches oscillator stage and increase
Beneficial medium 204, to carry out high-gain processing to oscillator stage pumping pulse.In embodiments of the present invention, the focused radius of pumping
It is 115 μm.Oscillator stage gain media 204 can be Nd:YVO4 crystal or Nd:GdVO4 crystal, entire length 7mm；Wherein, it shakes
The front surface of stage gain medium 204, the i.e. side close to dichroic mirror 203 are swung, high transmittance film is coated with；Oscillator stage gain media 204
Rear surface, the i.e. side close to Q-switching device 205 are arranged to Brewster's angle.The transparent side of dichroic mirror 203 is coated with the height of 808nm
Permeable membrane, the reflective side of dichroic mirror 203 are coated with the high-reflecting film of 1064nm, so that oscillator stage pumping pulse penetrates dichroic mirror 203,
Narrow-pulse laser is reflected into pattern matcher through dichroic mirror 203.
Further, in embodiments of the present invention, Q-switching device 205 is a pair of electric light RTP switch, for controlling oscillator
Loss state, the length is 13mm.201 front surface of oscillator stage pumping source of optical generator module to 206 total length of Effect of Back-Cavity Mirror is
51mm can produce the short pulse close to an intracavity round trip time by electric-optically Q-switched, and the seed optical pulse width generated is about
450ps, and setting high speed circuit element is not needed in entire control circuit, also, when oscillator stage light path increases, the arteries and veins of generation
Rushing width can increase accordingly.
On the basis of the above embodiments, the pattern matcher includes coupled lens and faraday isolator, in which:
The entering light side of the coupled lens is arranged in after the light emission side of the light generation grade module, for swashing to burst pulse
The size of light is adjusted, so that the amplifying stage of the narrow-pulse laser and the light amplification grade module after size adjusting pumps arteries and veins
Rush in capable matching；
The faraday isolator is arranged in after the light emission side of the coupled lens, for the light amplification grade mould to be isolated
The laser that block optical surface returns.
On the basis of the above embodiments, the pattern matcher further includes a quarter slide, a quarter glass
Piece is arranged after the faraday isolator output end, is adjusted for the polarization state to narrow-pulse laser.
Fig. 3 is the structural schematic diagram of pattern matcher provided in an embodiment of the present invention, be can refer to shown in Fig. 3, in the present invention
In embodiment, coupled lens 311 are used to adjust the spot size of the narrow-pulse laser of light generation grade module generation and amplifying stage pumps
The spot size of Pu pulse is consistent, realizes efficient laser power enhanced processing, it is preferable that couple in embodiments of the present invention
Lens 311 may be alternatively provided as it is multiple, to constitute coupled lens group.Faraday isolator 312 is for being isolated subsequent optical amplifying stage
The laser that the optical surface of module returns.In addition, in embodiments of the present invention, when burst pulse of the light amplification grade module to input swashs
The polarization state of light has particular requirement, a quarter slide 313 can also be arranged in pattern matcher, to the inclined of narrow-pulse laser
Vibration state is adjusted.
On the basis of the above embodiments, the light amplification grade module includes the first light amplification grade module and the second light amplification
Grade module, in which:
The first light amplification grade module and the second light amplification grade block coupled in series, the first light amplification grade module
Entering light, which flanks, receives the narrow-pulse laser that the pattern matcher is propagated, so that the narrow-pulse laser successively passes through described first
Light amplification grade module and the second light amplification grade module amplify processing, obtain the short-pulse laser based on Burst mode.
Fig. 4 is the structural schematic diagram of light amplification grade module provided in an embodiment of the present invention, be can refer to shown in Fig. 4, in this hair
In bright embodiment, amplifying stage pumping source 411, amplifying stage pump coupling system unit 412, reflecting mirror 413 in light amplification grade module,
A quarter slide 414, stage gain medium 415 and the setting of polarization splitting prism 416 connect on horizontal optical axis, and successively
Connect, by polarization splitting prism 416 receive pattern matcher propagate come narrow-pulse laser so that narrow-pulse laser is in light
Processing is amplified in amplifying stage module.Wherein 411 pulse of amplifying stage pumping source is synchronous with oscillator stage pumping source, realizes maximum effect
Rate pumping.Reflecting mirror 413 is coated with 808nm high transmittance film close to 412 side of amplifying stage pump coupling unit, and reflecting mirror 413 is close to four
414 side of/mono- slide is coated with 1064 high-reflecting films so that make narrow-pulse laser pass twice through a quarter slide 414 and
Stage gain medium 415.In embodiments of the present invention, a quarter slide 414 makes the change of polarized direction of narrow-pulse laser
90 °, so that amplified narrow-pulse laser can export from polarization splitting prism 416.
Further, Fig. 5 is the entirety of the short-pulse laser system provided in an embodiment of the present invention based on Burst mode
Structural schematic diagram can refer to shown in Fig. 5, in embodiments of the present invention, in short-pulse laser system, is provided with the first light and puts
Grade module 501 and the second light amplification grade module 502 put optical power further by two light amplification grade modules of having connected greatly
Greatly.When the close saturation of stage gain effect, even if initial Burst pulse train energy fluctuation is larger, due to passing through two-stage
The amplification of light amplification grade, so that the energy of each pulse can also approach, final output energy fluctuation is reduced, and pulse train becomes more
Add stabilization.Preferably, in embodiments of the present invention, the light emission side of light generation grade module is provided with reflective mirror 503, so that light
The narrow-pulse laser that oscillator stage module generates is reflected into pattern matcher by reflective mirror 503, to improve short-pulse laser
The space utilization rate of device system.
On the basis of the above embodiments, the Q-switching device is that electro-optic Q switch or acousto-optic Q modulation switch.
On the basis of the above embodiments, the oscillator stage pumping source is diode laser or Bar laser.
Fig. 6 is the process of the short-pulse laser system control method provided in an embodiment of the present invention based on Burst mode
Schematic diagram, as shown in fig. 6, the embodiment of the invention provides a kind of controls of short-pulse laser system based on Burst mode
Method, comprising:
Step 601, it obtains pump triggering signal and adjusts Q trigger signal, to obtain narrow-pulse laser；
Step 602, the size of the narrow-pulse laser is adjusted, the narrow-pulse laser after obtaining size adjusting；
Step 603, processing is amplified to the narrow-pulse laser after size adjusting, generates the short arteries and veins based on Burst mode
Impulse light.
In embodiments of the present invention, outer control circuit be used to control pumping in light generation grade module and Q-switching device when
Sequence, and adjust the first pulse suppression effect of control train of pulse.In embodiments of the present invention, outer control circuit uses a binary channels
Signal generator, the delay of two interchannels is adjustable, to export the adjustable impulse wave of repetition.Fig. 7 is provided in an embodiment of the present invention
The waveform diagram of trigger signal can refer to shown in Fig. 7, and pumping source driving signal is the pump triggering signal of low repetition, work as light
After laser diode in oscillator stage module receives this signal, it can continue to be pumped to gain media.Q-switching device driving signal
It is the tune Q trigger signal of Gao Zhongying, within the pumping duration, Q trigger signal is adjusted to experienced N number of period, represents Q-switch opening
N times generate a string of Q impulses.After undergoing the t0 time, pumping source is closed, until next pump triggering signal occurs.In
In the embodiment of the present invention, the delay and shape for adjusting Q trigger signal are individually adjusted, first pulse effects can be inhibited.Pass through above-mentioned reality
Apply the mode of example, the embodiment of the present invention can export a series of pulses of Gao Zhongying in envelope, while heat production be also limited to compared with
Small degree.
Further, the spot size and amplifying stage of the narrow-pulse laser generated by adjusting light generation grade module pump arteries and veins
The spot size of punching is consistent, finally amplifies processing to the narrow-pulse laser after size adjusting, generates based on Burst mode
Short-pulse laser.
A kind of control method of short-pulse laser system based on Burst mode provided in an embodiment of the present invention, is compared
The prior art can keep short-pulse laser string to stablize output, and pulse width approximation is stablized not under a wide range of work repetition
Become, improves the stability of laser.
Fig. 8 is the relationship signal of single pulse width data of the work provided in an embodiment of the present invention under different repetitions
Figure, can refer to shown in Fig. 8, and in embodiments of the present invention, under conditions of work repetition 1kHz to 80kHz, laser output is single
Pulse width is basically unchanged, and is stablized near 460ps.When reaching the work repetition of 100kHz, on the laser pulse width of generation
It is raised to 510ps.Compared with prior art, the beneficial effects of the present invention are: Gao Zhongying high energy may be implemented in the embodiment of the present invention
Measure the output of solid short-pulse laser；When adjusting work repetition on a large scale, output single pulse pulsewidth is basically unchanged；Pass through setting
Trigger signal delay and shape, can inhibit the first pulse effects of Q-switched laser；Amplified by multistage, high stable may be implemented
The laser pulse sequence output of degree, big energy.
Fig. 9 is electronic devices structure schematic diagram provided in an embodiment of the present invention, and referring to Fig. 9, which may include:
Processor (processor) 901, communication interface (Communications Interface) 902, memory (memory) 903
With communication bus 904, wherein processor 901, communication interface 902, memory 903 are completed mutual by communication bus 904
Communication.Processor 901 can call the logical order in memory 903, to execute following method: obtain pump triggering signal and
Q trigger signal is adjusted, to obtain narrow-pulse laser；The size of the narrow-pulse laser is adjusted, after obtaining size adjusting
Narrow-pulse laser；Processing is amplified to the narrow-pulse laser after size adjusting, the short pulse based on Burst mode is generated and swashs
Light.
In addition, the logical order in above-mentioned memory 903 can be realized by way of SFU software functional unit and conduct
Independent product when selling or using, can store in a computer readable storage medium.Based on this understanding, originally
Substantially the part of the part that contributes to existing technology or the technical solution can be in other words for the technical solution of invention
The form of software product embodies, which is stored in a storage medium, including some instructions to
So that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation of the present invention
The all or part of the steps of example the method.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM,
Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. it is various
It can store the medium of program code.
On the other hand, the embodiment of the present invention also provides a kind of non-transient computer readable storage medium, is stored thereon with meter
Calculation machine program, the computer program be implemented to carry out when being executed by processor the various embodiments described above offer based on Burst mode
Short-pulse laser system control method, for example, obtain pump triggering signal and adjust Q trigger signal, it is narrow to obtain
Pulse laser；The size of the narrow-pulse laser is adjusted, the narrow-pulse laser after obtaining size adjusting；To size adjusting
Narrow-pulse laser afterwards amplifies processing, generates the short-pulse laser based on Burst mode.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of short-pulse laser system based on Burst mode, which is characterized in that including outer control circuit, light generation grade
Module, pattern matcher and light amplification grade module, in which:
The output port of the outer control circuit connects the input port of the light generation grade module, for generating trigger signal,
And the light generation grade module is sent by the trigger signal, for controlling the light generation grade module；Wherein, the touching
It signals to be pulse electrical signal, including pump triggering signal and tune Q trigger signal；
The light generation grade module, for generating narrow-pulse laser according to the trigger signal received；
The entering light side of the pattern matcher is arranged in after the light emission side of the light generation grade module, for the burst pulse
The size of laser is adjusted, and sends the light amplification grade module for the narrow-pulse laser after size adjusting；
The entering light side of the light amplification grade module is arranged in after the light emission side of the pattern matcher, after to size adjusting
Narrow-pulse laser amplify processing, generate the short-pulse laser based on Burst mode.
2. the short-pulse laser system according to claim 1 based on Burst mode, which is characterized in that the light vibration
Swinging a grade module includes oscillator stage pumping source, oscillator stage gain media and Q-switching device, in which:
The oscillator stage pumping source emits oscillator stage pumping pulse for executing the control instruction of the pump triggering signal
To the oscillator stage gain media；
The oscillator stage gain media, for providing gain regions for oscillator stage pumping pulse；
The Q-switching device, for carrying out tune Q to the oscillator stage pumping pulse after gain according to the tune Q trigger signal, with
To narrow-pulse laser.
3. the short-pulse laser system according to claim 1 based on Burst mode, which is characterized in that the mode
Adaptation includes coupled lens and faraday isolator, in which:
The entering light side of the coupled lens is arranged in after the light emission side of the light generation grade module, for narrow-pulse laser
Size is adjusted so that the amplifying stage pumping pulse of narrow-pulse laser and the light amplification grade module after size adjusting into
Row matching；
The faraday isolator is arranged in after the light emission side of the coupled lens, for the light amplification grade module light to be isolated
Learn the laser that surface returns.
4. the short-pulse laser system according to claim 3 based on Burst mode, which is characterized in that the mode
Adaptation further includes a quarter slide, and a quarter slide is arranged after the faraday isolator output end, is used
It is adjusted in the polarization state to narrow-pulse laser.
5. the short-pulse laser system according to claim 1 based on Burst mode, which is characterized in that the light is put
Big grade module includes the first light amplification grade module and the second light amplification grade module, in which:
The first light amplification grade module and the second light amplification grade block coupled in series, the entering light of the first light amplification grade module
It flanks and receives the narrow-pulse laser that the pattern matcher is propagated, so that the narrow-pulse laser is successively put by first light
Big grade module and the second light amplification grade module amplify processing, obtain the short-pulse laser based on Burst mode.
6. the short-pulse laser system according to claim 2 based on Burst mode, which is characterized in that the Q regulator
Part is that electro-optic Q switch or acousto-optic Q modulation switch.
7. the short-pulse laser system according to claim 2 based on Burst mode, which is characterized in that the oscillation
Grade pumping source is diode laser or Bar laser.
8. a kind of control method based on any short-pulse laser system based on Burst mode of claim 1 to 7,
It is characterised by comprising:
It obtains pump triggering signal and adjusts Q trigger signal, to obtain narrow-pulse laser；
The size of the narrow-pulse laser is adjusted, the narrow-pulse laser after obtaining size adjusting；
Processing is amplified to the narrow-pulse laser after size adjusting, generates the short-pulse laser based on Burst mode.
9. a kind of electronic equipment including memory, processor and stores the calculating that can be run on a memory and on a processor
Machine program, which is characterized in that the step of processor realizes method as claimed in claim 8 when executing described program.
10. a kind of non-transient computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer
The step of method as claimed in claim 8 is realized when program is executed by processor.
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