CN108390246A - A kind of quasi-continuous optical fiber laser of module chemical combination beam - Google Patents
A kind of quasi-continuous optical fiber laser of module chemical combination beam Download PDFInfo
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- 239000000835 fiber Substances 0.000 claims abstract description 31
- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 238000005253 cladding Methods 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims description 35
- 238000003466 welding Methods 0.000 claims description 33
- 239000004065 semiconductor Substances 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 16
- 238000012544 monitoring process Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
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- 230000006872 improvement Effects 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- 238000002310 reflectometry Methods 0.000 description 2
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- 206010054949 Metaplasia Diseases 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
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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
- H01S3/05—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends
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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
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
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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
- H01S3/094049—Guiding of the pump light
- H01S3/094053—Fibre coupled pump, e.g. delivering pump light using a fibre or a fibre bundle
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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
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
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Abstract
The present invention relates to fiber laser technology field more particularly to a kind of quasi-continuous optical fiber lasers of module chemical combination beam, including multiple optical fiber laser modules, beam merging apparatus and output device；Each optical fiber laser module includes N+M pump laser, the first bundling device, high reflective grid, gain fibre, low reflective grid and the second bundling device, the beam merging apparatus includes more input optical fibres and an output optical fibre, and the output device includes cladding light stripper and fiber output head；The present invention generates laser first with the pump laser excitation gain optical fiber for being located at bilateral, form optical fiber laser module, recycle the thinking of " modularization ", the multiple laser that multiple identical optical fiber laser modules generate is subjected to conjunction beam using beam merging apparatus, to form high-power quasi-continuous lasing, up to thousands of watts, the present invention has easy to manufacture laser power, stability is good, it can be achieved that the advantages of Flexible Production.
Description
Technical field
The present invention relates to fiber laser technology field more particularly to a kind of quasi-continuous optical-fiber lasers of module chemical combination beam
Device.
Background technology
Optical fiber laser has many advantages, such as that good beam quality, electro-optical efficiency be high, small, non-maintaining, long lifespan, closely
Nian Lai, process equipment based on fiber laser technology, such as laser marking machine, engraving machine, cutting machine, bonding machine etc. by
It is widely used in industry-by-industry.Although comparing conventional laser, optical fiber laser has lot of advantages, its power is relatively low,
It is mostly the middle low power optical fiber laser of hectowatt grade, to find out its cause, finding in the development process of optical fiber laser, adulterates light
Fibre is influenced by nonlinear effects such as stimulated Brillouin scattering and stimulated Raman scatterings and the factors such as the thermal damage of fibre core limit
System so that single fiber output power is relatively limited, and output power highest is also with regard to 1500W or so.Although being mixed using fibre core is thicker
Veiling glare fibre can further hoisting power, but thick fiber-core doped fiber cost is higher and power provides limited, therefore this power
The method of promotion is not used generally.And in automobile making, the technical fields such as shipbuilding and aeronautical manufacture, laser is used for
When operation is processed in cutting, welding of metal and nonmetallic materials etc., generally requires laser power and reach multikilowatt or more, therefore pass
The optical fiber laser of system can not meet application demand.For this purpose, researcher considers multiple optical fiber laser modularization makings,
It is combined into a branch of output by beam merging apparatus, so that the power of optical fiber laser is improved, more commonly closes beam at present
Method has：Optics coherence tomography, raster method and Space Coupling, wherein：Optics coherence tomography is complicated and is not easy to adjust, and raster method is to system
Required precision is high and stability is poor；Space Coupling, the then laser being coupled out are usually spatial light, are not easy to realize the soft of laser
Property metaplasia production.Therefore it needs to design a kind of combined beam light fibre laser, makes it while meeting high-power output, and there is no upper
The shortcomings that stating three kinds of conjunction Shu Fangfa.
Invention content
For the problems of the prior art, the present invention provides the quasi-continuous optical-fiber laser of a kind of high power, module chemical combination beam
Device
To realize the above technical purpose, the technical scheme is that：
A kind of quasi-continuous optical fiber laser of module chemical combination beam, including multiple optical fiber laser modules, beam merging apparatus and defeated
Go out device；
Each optical fiber laser module includes N+M pump laser, the first bundling device, the reflective grid of height, gain fibre, low
There is N root input optical fibres, second bundling device to be inputted with M+1 roots for reflective grid and the second bundling device, first bundling device
Optical fiber, N number of pump laser are connected with the N root input optical fibres of the first bundling device, the output optical fibre of first bundling device
With the input terminal welding of high reflective grid, one end welding of the output end and gain fibre of the reflective grid of height, the M pumping swashs
Light device is connected with the M root input optical fibres of the second bundling device, the output end of the output optical fibre of second bundling device and low reflective grid
Welding, the other end welding of the input terminal and gain fibre of the low reflective grid, the input light of remaining second bundling device
Fibre is used as output signal optical fiber；
The beam merging apparatus includes more input optical fibres and an output optical fibre, and quantity and the optical fiber of the input optical fibre swash
The quantity of light device module matches, one end of more input optical fibres output signal with multiple optical fiber laser modules respectively
Fused fiber splice, the other end block one end welding in cone area and output optical fibre after fused biconical taper；
The output device includes cladding light stripper and fiber output head, the input terminal of the cladding light stripper with it is defeated
Go out the other end welding of optical fiber, output end is connected with fiber output head.
Preferably, first bundling device includes N roots input optical fibre and an output optical fibre, the one of N root input optical fibres
End is connected with N number of pump laser respectively, and the other end blocks one end welding in cone area and output optical fibre after fused biconical taper, defeated
Go out the input terminal welding of the other end and high reflective grid of optical fiber.
Preferably, second bundling device includes M+1 roots input optical fibre and an output optical fibre, M+1 root input optical fibres
One end of middle M roots optical fiber is connected with M pump laser respectively, and the other end blocks cone area and output optical fibre after fused biconical taper
One end welding, the output end welding of the other end of output optical fibre and low reflective grid.
Include correspondingly sensing acquisition module and N in each optical fiber laser module as an improvement, further including control module
+ M identical drive modules；In each optical fiber laser module, N+M drive module is respectively used to N+M pumping of driving
Laser, sensing acquisition module are used to monitor the peak power, pulse energy and module of optical fiber laser module output signal
Interior temperature information simultaneously feeds back to control module；The control module is used to control the driving mould in all optical fiber laser modules
Block simultaneously receives the monitoring information that sensing acquisition module feedback returns in all optical fiber laser modules.
Preferably, the sensing acquisition module include for carry out the peak value of pulse detection unit of peak power monitoring,
For the single pulse energy amount detection unit of pulse energy monitoring and for multiple temperature sensors of temperature monitoring, the multiple temperature
Degree sensor is respectively placed in the position for needing to detect temperature in optical fiber laser module.
Preferably, the drive module includes DC power supply DC1, capacitance C1, metal-oxide-semiconductor Q1, PWM controller, metal-oxide-semiconductor
One end drain electrode with the anode of DC power supply DC1, metal-oxide-semiconductor Q1 respectively of Q2, inductance L1, resistance R1, capacitance C2, the capacitance C1
It is connected, the other end is connected with one end of the cathode of DC power supply DC1, the source electrode of metal-oxide-semiconductor C2, capacitance C2 respectively, the metal-oxide-semiconductor Q1
Grid be connected with the first port of PWM controller, source electrode is connected with the drain electrode of one end of inductance and metal-oxide-semiconductor Q2 respectively, described
The second port of PWM controller is connected with the grid of metal-oxide-semiconductor Q2, and the other end of the inductance L1 is connected with one end of resistance R1,
The other end of the resistance R1 is connected with the other end of capacitance C2, and driven pump laser is in parallel with capacitance C2, the PWM
Controller is connected with control module.
It is put as an improvement, the drive module further includes current sample feedback error amplifier, voltage sample feedback error
The third port of big device, the PWM controller is connected with the first port of current sample feedback error amplifier, the 4th port with
The first port of voltage sample feedback error amplifier is connected, second port and the electricity of the current sample feedback error amplifier
The one end for hindering R1 is connected, and third port is connected with the other end of resistance R1, and the second of the voltage sample feedback error amplifier
Port is connected with the other end of resistance R1.
Preferably, the peak value of pulse detection unit include photodiode PD1, resistance R2, resistance R3, resistance R4,
Resistance R5, resistance R6, resistance R7, capacitance C3, capacitance C4, capacitance C5, capacitance C6, capacitance C7, capacitance C8, capacitance C9, capacitance
C10, trsanscondutance amplifier, operational amplifier, voltage reference IC and the first ADC sampling modules；The anode of the photodiode PD1
Ground connection, cathode are connected with one end of resistance R2；The other end of the resistance R2 respectively with one end of capacitance C3, resistance R3 one
End, the first input end of trsanscondutance amplifier are connected；Second input terminal of the trsanscondutance amplifier respectively with one end of resistance R4, electricity
The one end for holding C4 is connected, and power supply negative input terminal ground connection, power supply positive input connects+5VDC power supplys and one end phase with capacitance C5
Even, output end is connected with one end of the other end of capacitance C3, the other end of resistance R3, resistance R5 respectively；The capacitance C4's is another
One end is grounded；The other end of the capacitance C5 is grounded；The other end of the resistance R5 respectively with one end of capacitance C6, operation amplifier
The first input end of device is connected；The other end of the capacitance C6 is grounded；The power supply negative input terminal of the operational amplifier is grounded,
Power supply positive input connects+5VDC power supplys and is connected with one end of capacitance C7, and output end is defeated with the second of operational amplifier respectively
Enter end, the ends VIN of analog-to-digital conversion device AD1 are connected；The other end of the capacitance C7 is grounded；The VIN terminations of the voltage reference IC+
5VDC power supplys and it is connected with one end of capacitance C8, the ends GND are grounded and are connected with the other end of capacitance C8, the ends VOUT conduct+5VD_
REF output ends and it is connected with one end of resistance R6；The other end of the resistance R6 respectively with the other end of resistance R4, resistance R7
One end is connected；The other end of the resistance R7 is grounded；The vdd terminal of the first ADC sampling modules connect+5VD_REF output ends and
It is connected respectively with one end of one end of capacitance C9, capacitance C10；The ends GND_1 of the first ADC sampling modules, the ends GND_2, electricity
The other end of the other end, capacitance C10 that hold C9 is connected and is grounded, the first ADC sampling modulesEnd, the ends SDO, the ends SCLK
It is connected with control module.
Preferably, the single pulse energy amount detection unit includes photodiode PD2, resistance R8, resistance R9, resistance
R10, resistance R11, resistance R12, resistance R13, capacitance C11, capacitance C12, capacitance C13, capacitance C14, capacitance C15, capacitance C16,
Capacitance C17, capacitance C18, difference integral amplifier, zero device of mirror, analog switch and the 2nd ADC sampling modules；Two pole of the photoelectricity
The cathode of pipe PD2 connects+5VDC power supplys, and anode is connected with one end of one end of resistance R8, resistance R10 respectively；The resistance R8's
The other end is grounded and is connected with one end of resistance R9；The other end of the resistance R9 is integrated with one end of capacitance C11, difference respectively
The first input end of amplifier, the ends NC of analog switch are connected；The other end of the resistance R10 respectively with one end of capacitance C12,
Second input terminal of difference integral amplifier is connected；The power supply negative input terminal of the difference integral amplifier is grounded, and power supply is just
Pole inputs termination+5VDC power supplys and to be connected with one end of capacitance C13, output end respectively with the other end of capacitance C11, analog switch
The ends COM, resistance R11 one end, reflect zero device the second input terminal be connected；The other end of the capacitance C12 and capacitance C13's is another
One end is grounded；The ends GND of the analog switch are grounded, and V+ termination+5VDC power supplys and are connected with one end of capacitance C14；It is described
The other end of capacitance C14 is grounded；It is described mirror zero device first input end respectively with one end of resistance R12, one end phase of resistance R13
Even, power supply positive input connects+5VDC power supplys and is connected with one end of capacitance C15, power supply negative input terminal ground connection and and resistance
The other end of R13 is connected；Another termination+5VDC power supplys of the resistance R12；The other end of the capacitance C15 is grounded；The electricity
The other end of resistance R11 is connected with the ends VIN of one end of capacitance C16, the 2nd ADC sampling modules respectively；The capacitance C16's is another
End ground connection；The vdd terminal of the 2nd ADC sampling modules connect+5VD_REF output ends and respectively with one end of capacitance C17, capacitance
One end of C18 is connected；The ends GND_1 of the 2nd ADC sampling modules, the ends GND_2, the other end of capacitance C17, capacitance C18
The other end is connected and is grounded, the ends IN of the analog switch, the output end of zero device that reflects, the 2nd ADC sampling modulesEnd, SDO
End, the ends SCLK are connected with control module.
Preferably, the control module uses dsp processor
From the above, it can be seen that the present invention has following advantages：
1. the present invention generates laser first with the pump laser excitation gain optical fiber being arranged in bilateral, optical-fiber laser is formed
Device module ensure that the high power of laser module per side in optical fiber laser inside modules including multiple pump lasers
Output, then the thinking based on " modularization ", replicate multiple identical optical fiber laser modules, will be multiple identical using beam merging apparatus
Optical fiber laser module generate multiple laser carry out conjunction beam, to form the quasi-continuous lasing of higher power, laser power
Up to thousands of watts, it disclosure satisfy that automobile making, the industries such as shipbuilding and aviation carry out metal and nonmetallic materials
Laser cutting, the demand of laser welding.
2. building the scheme of high-capacity optical fiber laser by closing beam compared to others, conjunction beam scheme of the invention has
It is easy to make, the good advantage of stability is, it can be achieved that Flexible Production, while user can configure optical fiber according to concrete application demand and swash
The quantity of the quantity of light device module and each optical fiber laser module inside-pumping laser.
3. the present invention is configured with sensing acquisition module in each optical fiber laser module, optical-fiber laser can be monitored in real time
The performance of device module and the control module for feeding back to laser, to judge laser whether normal operation, it is ensured that each optical fiber swashs
Light device module stablizes output, and then ensures that the performance of entire laser is stablized, and prevents unexpected generation, reaches the mesh of safety in production
's.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of optical fiber laser module of the present invention；
Fig. 3 is the structural schematic diagram of beam merging apparatus of the present invention；
Fig. 4 is the structural schematic diagram of the present invention；
Fig. 5 is the circuit diagram of drive module of the present invention；
Fig. 6 is the circuit diagram of peak value of pulse detection unit of the present invention；
Fig. 7 is the circuit diagram of single pulse energy amount detection unit of the present invention.
Specific implementation mode
In conjunction with Fig. 1 to Fig. 7, one embodiment that the present invention will be described in detail, but the claim of the present invention is not done any
It limits.
As shown in Figure 1, a kind of quasi-continuous optical fiber laser of module chemical combination beam, including multiple optical fiber laser modules 1, conjunction
Bundle device 2 and output device；
As shown in Fig. 2, each optical fiber laser module 1 is anti-including N+M pump laser 11, the first bundling device 12, height
Grating 13, gain fibre 14,15 and second bundling device 16 of low reflective grid, the first bundling device 12 have N root input optical fibres, and second closes
Beam utensil has M+1 root input optical fibres, N number of pump laser 11 to be connected with the N roots input optical fibre 121 of the first bundling device 12, and first
The input terminal welding of the output optical fibre of bundling device 12 and high reflective grid 13, the output end of high reflective grid 13 and the one of gain fibre 14
Welding, M pump laser 11 is held to be connected with the M root input optical fibres of the second bundling device 16, the output optical fibre of the second bundling device 161
With the output end welding of low reflective grid 15, the input terminal of low reflective grid 15 and the other end welding of gain fibre 14, remaining one
The input optical fibre of the second bundling device of root 16 as output signal optical fiber 161, wherein：High reflective grid generate laser to gain fibre
Reflectivity is more than 95%, and the reflectivity that low reflective grid generate gain fibre laser is that 10%-30%, N and M take positive integer, and two
Person's value can be consistent, can not also be consistent；
As shown in figure 3, beam merging apparatus 2 includes more input optical fibres 21 and an output optical fibre 22, the number of input optical fibre 21
Amount and the quantity of optical fiber laser module 1 match, one end of more input optical fibres 22 respectively with multiple optical fiber laser modules 1
The fine welding of output signal light 161, the other end blocks one end welding in cone area and output optical fibre 22 after fused biconical taper；
As shown in Figure 1, output device 3 includes cladding light stripper 31 and fiber output head 32, the cladding light stripper
31 input terminal and the other end welding of output optical fibre 22, output end are connected with fiber output head 32.
The operation principle of above-mentioned technical proposal is：First be arranged bilateral pump laser excitation gain optical fiber (i.e.
Both-end pumping) laser is generated, optical fiber laser module is formed, is swashed including multiple pumpings per side in optical fiber laser inside modules
Light device ensure that the high-power output of laser module, then the thinking based on " modularization ", replicate multiple identical optical-fiber lasers
The multiple laser that multiple identical optical fiber laser modules generate is carried out conjunction beam, to be formed by device module using beam merging apparatus
The quasi-continuous lasing of higher power.
In above-mentioned technical proposal：
1. the structure of the first bundling device and the second bundling device is referred to the structure structure of beam merging apparatus, specific as follows：
The structure of (1) first bundling device is：Including N roots input optical fibre and an output optical fibre, one end of N root input optical fibres
It is connected respectively with N number of pump laser, the other end blocks one end welding in cone area and output optical fibre, output after fused biconical taper
The input terminal welding of the other end of optical fiber and high reflective grid；Its conjunction Shu Yuanli is identical as the principle of beam merging apparatus 2, and structural reference is such as
Beam merging apparatus shown in Fig. 3.
The structure of (2) second bundling devices is：Second bundling device includes M+1 roots input optical fibre and an output optical fibre, M+1 roots
One end of M root optical fiber in input optical fibre is connected with M pump laser respectively, and the other end blocks cone area after fused biconical taper
With one end welding of output optical fibre, the output end welding of the other end of output optical fibre and low reflective grid；It closes Shu Yuanli and closes beam
The principle of device 2 is identical, structural reference beam merging apparatus as shown in Figure 3.
Certainly, the bundling device structure that the first bundling device and the second bundling device can also use other conventional, as long as can reach
To the purpose for closing beam.
2. the quantity of optical fiber laser module and the quantity of each optical fiber laser module inside-pumping laser can bases
Depending on concrete application demand.
From the above, it can be seen that this programme has the following advantages：
1. optical fiber laser can realize that high-power output, laser power disclosure satisfy that automobile making, ship up to thousands of watts
Oceangoing ship manufactures and the industries such as aviation are cut by laser metal and nonmetallic materials, the demand of laser welding；
2. building the scheme of high-capacity optical fiber laser by closing beam compared to others, conjunction beam scheme of the invention has
It is easy to make, the good advantage of stability is, it can be achieved that Flexible Production；
3. user can configure the quantity of optical fiber laser module and each optical fiber laser module according to concrete application demand
The quantity of inside-pumping laser.
Based on technical solution shown in FIG. 1, the circuit control part of the quasi-continuous optical fiber laser of module chemical combination beam is built,
Specifically：
As shown in figure 4, the quasi-continuous optical fiber laser of module chemical combination beam further includes control module, correspondingly in each optical fiber
Sensing acquisition module and N+M identical drive modules is arranged in laser die Block- matching；In each optical fiber laser module, N+
M drive module is respectively used to N+M pump laser of driving, and sensing acquisition module is for monitoring the output of optical fiber laser module
The peak power of signal, pulse energy and temperature information in module simultaneously feed back to control module；Control module is for controlling
Drive module in all optical fiber laser modules simultaneously receives what sensing acquisition module feedback in all optical fiber laser modules returned
Monitoring information.
The drive signal of all drive modules of each optical fiber laser module is controlled by control module, and then is controlled every
The laser output signal of a optical fiber laser module, while swashing using each optical fiber laser module of sensing acquisition module monitors
Temperature information (such as bundling device position, the posetionof weld of the peak power of optical output signal, pulse energy, key position
Deng), and these are fed back into control module, control module judges whether laser is normally transported according to the monitoring information received
Row, it is ensured that each optical fiber laser module stablizes output so that the quasi-continuous optical fiber laser of module chemical combination beam can obtain
The quasi-continuous output of high power, stabilization.
Concrete scheme design is carried out to above-mentioned modules：
1. drive module includes DC power supply DC1, capacitance C1, metal-oxide-semiconductor Q1, PWM controller, metal-oxide-semiconductor Q2, inductance L1, electricity
Hinder R1 and capacitance C2；One end of capacitance C1 is connected with the drain electrode of the anode of DC power supply DC1, metal-oxide-semiconductor Q1 respectively, other end difference
It is connected with one end of the cathode of DC power supply DC1, the source electrode of metal-oxide-semiconductor C2, capacitance C2；The grid of metal-oxide-semiconductor Q1 and PWM controller
First port is connected, and source electrode is connected with the drain electrode of one end of inductance and metal-oxide-semiconductor Q2 respectively；The second port and MOS of PWM controller
The grid of pipe Q2 is connected；The other end of inductance L1 is connected with one end of resistance R1；The other end of resistance R1 is another with capacitance C2's
End is connected；Driven pump laser (one end of the cathode and capacitance C2 of driven pump laser in parallel with capacitance C2
It is connected, anode is connected with the other end of capacitance C2), PWM controller is connect by SPI digital communication bus with control module.
In said program：The grid of metal-oxide-semiconductor is all connected with PWM PDM keyers and is controlled by it break-make, metal-oxide-semiconductor Q1's
Drain electrode and source electrode are separately connected power supply and inductance, form inductance and magnetize access, the drain electrode of metal-oxide-semiconductor Q2 and source electrode are then separately connected electricity
Sense and driven pump laser form inductive discharge circuit, are generated by the way of switched current source and carry out laser perseverance
The driving in stream source.
In order to further increase the stability of drive module, drive module further include current sample feedback error amplifier,
Voltage sample feedback error amplifier, the first port of the third port and current sample feedback error amplifier of PWM controller
It is connected, the 4th port is connected with the first port of voltage sample feedback error amplifier, current sample feedback error amplifier
Second port is connected with one end of resistance R1, and third port is connected with the other end of resistance R1, the amplification of voltage sample feedback error
The second port of device is connected with the other end of resistance R1.Drive module is worked by the way of electric current, the double sampled feedback of voltage, with
The mode of constant frequency feedback regulation duty ratio ensures to export constant laser diode current.
2. the sensing function that sensing acquisition module is completed as needed is divided into the pulse for carrying out peak power monitoring
Peak detection unit, for pulse energy monitoring single pulse energy amount detection unit and for multiple temperature sensing of temperature monitoring
Device, specifically：
(1) multiple temperature sensors are respectively placed in and are also easy to produce high temperature in optical fiber laser module, need to detect each of temperature
Fusion point in a position, such as the first bundling device, the second bundling device；
(2) peak value of pulse detection unit includes photodiode PD1, resistance R2, resistance R3, resistance R4, resistance R5, resistance
R6, resistance R7, capacitance C3, capacitance C4, capacitance C5, capacitance C6, capacitance C7, capacitance C8, capacitance C9, capacitance C10, mutual conductance amplification
Device, operational amplifier, voltage reference IC and the first ADC sampling modules；The plus earth of photodiode PD1, cathode and resistance
One end of R2 is connected；The other end of resistance R2 respectively with one end of capacitance C3, one end of resistance R3, trsanscondutance amplifier it is first defeated
Enter end to be connected；Second input terminal of trsanscondutance amplifier is connected with one end of one end of resistance R4, capacitance C4 respectively, and power cathode is defeated
Enter end ground connection, power supply positive input connects+5VDC power supplys and is connected with one end of capacitance C5, and output end is another with capacitance C3 respectively
One end, the other end of resistance R3, one end of resistance R5 are connected；The other end of capacitance C4 is grounded；The other end of capacitance C5 is grounded；Electricity
The other end of resistance R5 is connected with the first input end of one end of capacitance C6, operational amplifier respectively；The other end of capacitance C6 is grounded；
The power supply negative input terminal of operational amplifier is grounded, and power supply positive input connects+5VDC power supplys and is connected with one end of capacitance C7,
Output end is connected with the ends VIN of the second input terminal of operational amplifier, analog-to-digital conversion device AD1 respectively；Another termination of capacitance C7
Ground；VIN termination+5VDC the power supplys of voltage reference IC and it is connected with one end of capacitance C8, the ends GND ground connection and another with capacitance C8
End is connected, and the ends VOUT are connected as+5VD_REF output ends and with one end of resistance R6；The other end of resistance R6 respectively with resistance
The other end of R4, one end of resistance R7 are connected；The other end of resistance R7 is grounded；The vdd terminal of first ADC sampling modules meets+5VD_
REF output ends and it is connected respectively with one end of one end of capacitance C9, capacitance C10；The ends GND_1 of first ADC sampling modules, GND_
2 ends, the other end of capacitance C9, capacitance C10 the other end be connected and be grounded, the first ADC sampling modulesEnd, the ends SDO, SCLK
End is connect by SPI digital communication bus with control module.Specifically：Trsanscondutance amplifier uses OPA380 chips, operation to put
Big device uses REF5050_VSSOP8 chips, the first ADC sampling modules to use using LM321 chips, voltage reference IC
AD7680BRMZ_MSOP8 chips.
In above-mentioned technical proposal：Leakage light in photodiode PD1 acquisition output signals optical fiber 161, optical signal is turned
Turn to and input trsanscondutance amplifier after current signal, trsanscondutance amplifier converts current signal to voltage signal, trsanscondutance amplifier with
Reference voltage IC and the first ADC sampling modules are connected, and the first ADC sampling modules are to the voltage that will be sampled after voltage signal sampling
Signal is sent to control module.
(3) single pulse energy amount detection unit include photodiode PD2, resistance R8, resistance R9, resistance R10, resistance R11,
Resistance R12, resistance R13, capacitance C11, capacitance C12, capacitance C13, capacitance C14, capacitance C15, capacitance C16, capacitance C17, capacitance
C18, difference integral amplifier, analog switch, zero device of mirror and the 2nd ADC sampling modules；The cathode of photodiode PD2 connects+
5VDC power supplys, anode are connected with one end of one end of resistance R8, resistance R10 respectively；The other end of resistance R8 is grounded and and resistance
One end of R9 is connected；The other end of resistance R9 respectively with one end of capacitance C11, the first input end of difference integral amplifier, mould
The ends NC of quasi- switch are connected；The other end of resistance R10 respectively with one end of capacitance C12, difference integral amplifier second input
End is connected；The power supply negative input terminal of difference integral amplifier is grounded, and power supply positive input connects+5VDC power supplys and and capacitance
One end of C13 is connected, output end respectively with the other end of capacitance C11, the ends COM of analog switch, one end of resistance R11, mirror zero
Second input terminal of device is connected；The other end of capacitance C12, the other end of capacitance C13 are grounded；The ends GND of analog switch are grounded,
V+ termination+5VDC power supplys and it is connected with one end of capacitance C14；The other end of capacitance C14 is grounded；Reflect the first input end point of zero device
It is not connected with one end of one end of resistance R12, resistance R13, power supply positive input connects+5VDC power supplys and with the one of capacitance C15
End is connected, and power supply negative input terminal is grounded and is connected with the other end of resistance R13；Another termination+5VDC power supplys of resistance R12；
The other end of capacitance C15 is grounded；The other end of resistance R11 respectively with one end of capacitance C16, the ends VIN of the 2nd ADC sampling modules
It is connected, the other end ground connection of capacitance C16；The vdd terminal of 2nd ADC sampling modules connect+5VD_REF output ends and respectively with capacitance
One end of C17, one end of capacitance C18 are connected；The ends GND_1 of 2nd ADC sampling modules, the ends GND_2, capacitance C17 the other end,
The other end of capacitance C18 is connected and is grounded, the ends IN of analog switch, the output end of zero device that reflects, the 2nd ADC sampling modules
End, the ends SDO, the ends SCLK are connect by SPI digital communication bus with control module.Specifically：Difference integral amplifier uses
LM321 chips, analog switch use SGM3157 chips, zero device of mirror that LM358 chips, the 2nd ADC sampling modules is used to use
AD7680BRMZ_MSOP8 chips.
In above-mentioned technical proposal：Leakage light in photodiode PD2 acquisition output signals optical fiber 161, optical signal is turned
Input difference integral amplifier after current signal is turned to, difference integral amplifier, which converts current signal to a constant voltage, to be believed
Number, difference integral amplifier is connected with the 2nd ADC sampling modules, and the 2nd ADC sampling modules after voltage signal sampling to that will sample
To voltage signal be sent to control module, analog switch and zero device of mirror are used for ensureing that the complete reset of integrating circuit, simulation are opened
It closes and generates integral reset signal, reset integrating circuit, zero device of mirror judges whether to reset successfully.
When practical application, the photoelectricity of the photodiode PD2 and peak value of pulse detection unit of single pulse energy amount detection unit
Diode PD1 is same photodiode.
3. control module uses dsp processor, TMS320F28377D chips are specifically used.
The operation principle of optical fiber laser electric control part of the present invention is：Control module controls each optical fiber laser mould
N+M drive module in block, N+M drive module, which synchronizes, drives N+M pump laser work, to make multiple optical fiber swash
The operation of light device module synchronization sends out laser, while the sensing acquisition module in each optical fiber laser module is to the maneuverability of module
It can be monitored and feed back to control module, control module judges whether laser is normally transported according to the monitoring information received
Row, it is ensured that each optical fiber laser module stablizes output, and to ensure that laser overall operation is normal, output is stablized.
In conclusion the present invention has the following advantages：
From the above, it can be seen that the present invention has following advantages：
1. the present invention generates laser first with the pump laser excitation gain optical fiber being arranged in bilateral, optical-fiber laser is formed
Device module ensure that the high power of laser module per side in optical fiber laser inside modules including multiple pump lasers
Output, then the thinking based on " modularization ", replicate multiple identical optical fiber laser modules, will be multiple identical using beam merging apparatus
Optical fiber laser module generate multiple laser carry out conjunction beam, to form the quasi-continuous lasing of higher power, laser power
Up to thousands of watts, it disclosure satisfy that automobile making, the industries such as shipbuilding and aviation carry out metal and nonmetallic materials
Laser cutting, the demand of laser welding.
2. building the scheme of high-capacity optical fiber laser by closing beam compared to others, conjunction beam scheme of the invention has
It is easy to make, the good advantage of stability is, it can be achieved that Flexible Production, while user can configure optical fiber according to concrete application demand and swash
The quantity of the quantity of light device module and each optical fiber laser module inside-pumping laser.
3. the present invention is configured with sensing acquisition module in each optical fiber laser module, optical-fiber laser can be monitored in real time
The performance of device module and the control module for feeding back to laser, to judge laser whether normal operation, it is ensured that each optical fiber swashs
Light device module stablizes output, and then ensures that the performance of entire laser is stablized, and prevents unexpected generation, reaches the mesh of safety in production
's.
It is understood that above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to this
Technical solution described in inventive embodiments.It will be understood by those of ordinary skill in the art that still can be carried out to the present invention
Modification or equivalent replacement, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of quasi-continuous optical fiber laser of module chemical combination beam, it is characterised in that：Including multiple optical fiber laser modules, close beam
Device and output device；
Each optical fiber laser module includes N+M pump laser, the first bundling device, the reflective grid of height, gain fibre, low reflective
There is N root input optical fibres, second bundling device to have M+1 root input optical fibres for grid and the second bundling device, first bundling device,
N number of pump laser is connected with the N root input optical fibres of the first bundling device, and the output optical fibre and height of first bundling device are anti-
The input terminal welding of grating, one end welding of the output end and gain fibre of the reflective grid of height, the M pump laser with
The M root input optical fibres of second bundling device are connected, the output end welding of the output optical fibre of second bundling device and low reflective grid, institute
The other end welding of the input terminal and gain fibre of low reflective grid is stated, the input optical fibre of remaining second bundling device is as defeated
Go out signal optical fibre；
The beam merging apparatus includes more input optical fibres and an output optical fibre, quantity and the optical fiber laser module of input optical fibre
Quantity match, one end of the more input optical fibres is molten with the output signal optical fiber of multiple optical fiber laser modules respectively
It connects, the other end blocks one end welding in cone area and output optical fibre after fused biconical taper；
The output device includes cladding light stripper and fiber output head, the input terminal and output light of the cladding light stripper
Fine other end welding, output end are connected with fiber output head.
2. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 1, it is characterised in that：Described first closes beam
Device includes N roots input optical fibre and an output optical fibre, and one end of N root input optical fibres is connected with N number of pump laser respectively, another
One end welding in cone area and output optical fibre, the input of the other end of output optical fibre and high reflective grid are blocked in end after fused biconical taper
Hold welding.
3. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 1, it is characterised in that：Described second closes beam
Device includes M+1 roots input optical fibre and an output optical fibre, and one end of M root optical fiber is swashed with M pumping respectively in M+1 root input optical fibres
Light device be connected, the other end after fused biconical taper, block cone area and output optical fibre one end welding, the other end of output optical fibre with it is low
The output end welding of reflective grid.
4. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 1, it is characterised in that：It further include control mould
Block includes correspondingly sensing acquisition module and N+M identical drive modules in each optical fiber laser module；
In each optical fiber laser module, N+M drive module is respectively used to N+M pump laser of driving, sensing acquisition
Module is used to monitor the temperature information in the peak power, pulse energy and module of optical fiber laser module output signal and anti-
It is fed back to control module；
The control module is for controlling the drive module in all optical fiber laser modules and receiving all optical fiber laser moulds
The monitoring information that sensing acquisition module feedback returns in block.
5. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 4, it is characterised in that：The sensing acquisition
Module includes the single pulse energy inspection for carrying out the peak value of pulse detection unit of peak power monitoring, being monitored for pulse energy
It surveys unit and multiple temperature sensors for temperature monitoring, the multiple temperature sensor is respectively placed in optical fiber laser module
Inside need the position of detection temperature.
6. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 4 or 5, it is characterised in that：The driving
Module includes DC power supply DC1, capacitance C1, metal-oxide-semiconductor Q1, PWM controller, metal-oxide-semiconductor Q2, inductance L1, resistance R1, capacitance C2, institute
The one end for stating capacitance C1 is connected with the drain electrode of the anode of DC power supply DC1, metal-oxide-semiconductor Q1 respectively, the other end respectively with DC power supply
The cathode of DC1, the source electrode of metal-oxide-semiconductor C2, one end of capacitance C2 are connected, the first end of the grid and PWM controller of the metal-oxide-semiconductor Q1
Mouth is connected, and source electrode is connected with the drain electrode of one end of inductance and metal-oxide-semiconductor Q2 respectively, the second port and metal-oxide-semiconductor of the PWM controller
The grid of Q2 is connected, and the other end of the inductance L1 is connected with one end of resistance R1, the other end and the capacitance C2 of the resistance R1
The other end be connected, driven pump laser is in parallel with capacitance C2, and the PWM controller is connected with control module.
7. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 6, it is characterised in that：The drive module
Further include current sample feedback error amplifier, voltage sample feedback error amplifier, the third port of the PWM controller with
The first port of current sample feedback error amplifier is connected, the first end of the 4th port and voltage sample feedback error amplifier
Mouth is connected, and the second port of the current sample feedback error amplifier is connected with one end of resistance R1, third port and resistance
The other end of R1 is connected, and the second port of the voltage sample feedback error amplifier is connected with the other end of resistance R1.
8. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 5, it is characterised in that：The peak value of pulse
Detection unit includes photodiode PD1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, capacitance C3, electricity
Hold C4, capacitance C5, capacitance C6, capacitance C7, capacitance C8, capacitance C9, capacitance C10, trsanscondutance amplifier, operational amplifier, voltage base
Quasi- IC and the first ADC sampling modules；The plus earth of the photodiode PD1, cathode are connected with one end of resistance R2；It is described
The other end of resistance R2 is connected with the first input end of one end of capacitance C3, one end of resistance R3, trsanscondutance amplifier respectively；It is described
Second input terminal of trsanscondutance amplifier is connected with one end of one end of resistance R4, capacitance C4 respectively, power supply negative input terminal ground connection,
Power supply positive input connects+5VDC power supplys and is connected with one end of capacitance C5, output end respectively with the other end of capacitance C3, resistance
The other end of R3, one end of resistance R5 are connected；The other end of the capacitance C4 is grounded；The other end of the capacitance C5 is grounded；Institute
The other end for stating resistance R5 is connected with the first input end of one end of capacitance C6, operational amplifier respectively；The capacitance C6's is another
One end is grounded；The power supply negative input terminal of the operational amplifier is grounded, and power supply positive input connects+5VDC power supplys and and capacitance
One end of C7 is connected, and output end is connected with the ends VIN of the second input terminal of operational amplifier, analog-to-digital conversion device AD1 respectively；It is described
The other end of capacitance C7 is grounded；VIN termination+5VDC the power supplys of the voltage reference IC and it is connected with one end of capacitance C8, the ends GND
It is grounded and is connected with the other end of capacitance C8, the ends VOUT are connected as+5VD_REF output ends and with one end of resistance R6；It is described
The other end of resistance R6 is connected with one end of the other end of resistance R4, resistance R7 respectively；The other end of the resistance R7 is grounded；Institute
State the first ADC sampling modules vdd terminal connect+5VD_REF output ends and respectively with one end of capacitance C9, one end phase of capacitance C10
Even；The ends GND_1 of the first ADC sampling modules, the ends GND_2, the other end of capacitance C9, capacitance C10 the other end be connected and
Ground connection, the first ADC sampling modulesEnd, the ends SDO, the ends SCLK are connected with control module.
9. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 8, it is characterised in that：The single pulse energy
Amount detection unit includes photodiode PD2, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, electricity
Hold C11, capacitance C12, capacitance C13, capacitance C14, capacitance C15, capacitance C16, capacitance C17, capacitance C18, difference integral amplifier,
Reflect zero device, analog switch and the 2nd ADC sampling modules；The cathode of the photodiode PD2 connects+5VDC power supplys, anode difference
It is connected with one end of one end of resistance R8, resistance R10；The other end of the resistance R8 is grounded and is connected with one end of resistance R9；
The other end of the resistance R9 respectively with one end of capacitance C11, the NC of the first input end of difference integral amplifier, analog switch
End is connected；The other end of the resistance R10 is connected with the second input terminal of one end of capacitance C12, difference integral amplifier respectively；
The power supply negative input terminal of the difference integral amplifier is grounded, and power supply positive input connects+5VDC power supplys and with capacitance C13's
One end is connected, output end respectively with the other end of capacitance C11, the ends COM of analog switch, one end of resistance R11, zero device of mirror the
Two input terminals are connected；The other end of the capacitance C12 and the other end of capacitance C13 are grounded；The GND of the analog switch is terminated
Ground, V+ termination+5VDC power supplys are connected with one end of capacitance C14；The other end of the capacitance C14 is grounded；The of zero device of the mirror
One input terminal is connected with one end of one end of resistance R12, resistance R13 respectively, power supply positive input connect+5VDC power supplys and with electricity
The one end for holding C15 is connected, and power supply negative input terminal is grounded and is connected with the other end of resistance R13；The other end of the resistance R12
Connect+5VDC power supplys；The other end of the capacitance C15 is grounded；The other end of the resistance R11 respectively with one end of capacitance C16,
The ends VIN of two ADC sampling modules are connected；The other end of the capacitance C16 is grounded；The vdd terminal of the 2nd ADC sampling modules connects
+ 5VD_REF output ends and it is connected respectively with one end of one end of capacitance C17, capacitance C18；The 2nd ADC sampling modules
The ends GND_1, the ends GND_2, the other end of capacitance C17, capacitance C18 the other end be connected and be grounded, the ends IN of the analog switch,
Reflect the output end of zero device, the 2nd ADC sampling modulesEnd, the ends SDO, the ends SCLK are connected with control module.
10. the quasi-continuous optical fiber laser of module chemical combination beam according to claim 9, it is characterised in that：The control mould
Block uses dsp processor.
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