CN206099032U - Full fiber laser of high -energy nanosecond pulse based on incoherent closing is restrainted - Google Patents
Full fiber laser of high -energy nanosecond pulse based on incoherent closing is restrainted Download PDFInfo
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- CN206099032U CN206099032U CN201621098239.8U CN201621098239U CN206099032U CN 206099032 U CN206099032 U CN 206099032U CN 201621098239 U CN201621098239 U CN 201621098239U CN 206099032 U CN206099032 U CN 206099032U
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Abstract
The utility model relates to an optic fibre and laser technical field specifically are full fiber laser of high -energy nanosecond pulse based on incoherent closing is restrainted, it includes nanosecond pulse seed laser, fiber splitter, optical fiber amplifier, synchronous light path, fiber combiner and laser output head its characterized in that, the output and fiber splitter's the input of nanosecond pulse seed laser are connected, each shut output of fiber splitter is equipped with corresponding optical fiber amplifier respectively, fiber splitter carries out the shut back to the light signal that nanosecond pulse seed laser sent, each shut light signal to fiber splitter enlargies respectively, fiber splitter each along separate routes output link to each other with corresponding optical fiber amplifier's input respectively, each optical fiber amplifier's output links to each other with the fiber combiner input through synchronous light path respectively, fiber combiner's output and laser output head are connected, the average power height has, pulse energy is big, and small in size, and is easy to maintain, advantage such as reliable and stable.
Description
Technical field
This utility model is related to optical fiber and laser technology field, and particularly a kind of high-energy based on incoherent conjunction beam is high
Mean power nanosecond pulse full-optical-fiber laser.
Background technology
Fiber laser/amplifier is the laser/amplifier with the optical fiber of rare earth doped element as gain media, is passed through
The different rare earth element of doping, such as bait（Er）, an an ancient unit of weight equal to 20 or 24 *taels of silver（Yb）, thulium（Tm）, holmium（Ho）, neodymium（Nd）Deng fiber laser/amplifier
Service band is covered from ultraviolet to mid-infrared.Compared with other laser/amplifiers, fiber laser/amplifier has energy
Amount high conversion rate, output beam quality is good, compact conformation is stable, without the need for light path adjustment, perfect heat-dissipating, life-span length and without the need for tie up
The distinguishing features such as shield, therefore be rapidly developed and widely apply.
In recent years, high power nanosecond pulse full-optical-fiber laser is widely used in laser marking, laser engraving field, this
The output of class laser instrument is typically in tens watts of magnitudes, and pulse energy is in one or two MJ of magnitude.Laser cleaning laser
The mean power of device generally requires a few hectowatt magnitudes, and especially pulse energy needs to reach more than ten MJs, even 50 millis
It is more than Jiao.Therefore existing high power nanosecond pulse full-optical-fiber laser product cannot be applied to the huge laser cleaning row in market
Industry.Conjunction Shu Shixian mean powers are carried out to multi beam nanosecond pulse full optical fiber laser based on incoherent conjunction beam technology and reaches a kilowatt amount
Level, pulse energy reach the full-optical-fiber laser of hundred MJs of magnitudes and are significant.
The content of the invention
In order to solve deficiency of the prior art, this utility model aim to provide a kind of mean power reach a kilowatt magnitude,
Pulse energy reaches the nanosecond pulse full-optical-fiber laser of the high-energy of hundred MJs of magnitudes, high-average power.
In order to realize above-mentioned functions, this utility model will be realized by the following technical programs：
A kind of high-energy nanosecond pulse full-optical-fiber laser based on incoherent conjunction beam, it is characterised in that be provided with nanosecond pulse
Seed laser, fiber optic splitter, fiber amplifier, synchronous light path, optical-fiber bundling device and laser delivery, the nanosecond pulse kind
The outfan of sub- laser is connected with the input of fiber optic splitter, and fiber optic splitter is provided with no less than 2 branch outfans, optical fiber
The each branch outfan of beam splitter is respectively equipped with corresponding fiber amplifier, and fiber optic splitter is sent out nanosecond pulse seed laser
The optical signal for going out is carried out after branch, each branch optical signal of fiber optic splitter is amplified respectively, each branch of fiber optic splitter
Outfan is connected respectively with the input of corresponding fiber amplifier, and the outfan of each fiber amplifier distinguishes synchronized light path
It is connected with optical-fiber bundling device input, the outfan of optical-fiber bundling device is connected with laser delivery.
Nanosecond pulse seed laser described in the utility model can be a kind of actively Q-switched optical fiber laser, or its
He can provide the laser instrument of nanosecond laser pulses, such as can be the gain switch type pulse semiconductor laser of fiber coupling
Device, or a kind of butterfly semiconductor laser of current-regulation type, when nanosecond pulse seed laser is a kind of actively Q-switched optical fiber
During laser instrument, its nanosecond pulse seed laser is a kind of actively Q-switched optical fiber laser, and the actively Q-switched optical fiber laser includes the
Semiconductor pumping laser, fibre pump signal bundling device, the first Double Cladding Ytterbium Doped Fiber, high anti-fiber grating, fiber coupling
Acousto-optic modulator, low anti-fiber grating and the first fibre optic isolater, wherein the first semiconductor pumped laser and fibre pump signal
The pumping end connection of bundling device, the signal input fiber end face of fibre pump signal bundling device is chamfer, fibre pump signal
The signal output optical fiber of bundling device is connected with high anti-fiber grating one end, and the high anti-fiber grating other end is mixed with the first double clad
Ytterbium optical fiber one end connects, and the first Double Cladding Ytterbium Doped Fiber other end is connected with fiber coupling acousto-optic modulator, fiber coupling acousto-optic
Manipulator output optical fibre is connected with low anti-fiber grating, the input optical fibre of the low anti-fiber grating other end and the first fibre optic isolater
Welding；When nanosecond pulse seed laser is a kind of butterfly semiconductor laser of current-regulation type, including pulse current driver,
Fiber coupling butterfly semiconductor laser, output optical fibre and the second fibre optic isolater, fiber coupling butterfly semiconductor laser Jing
After pulse current driver drives, 1 micron waveband laser, fiber coupling butterfly semiconductor laser Jing output optical fibres and the are exported
The input connection of two fibre optic isolaters.A few KHz of repetition rate that nanosecond pulse seed laser can be exported are to hundreds of kilohertz
Hereby, pulse width is from tens nanoseconds to the pulse laser of hundreds of nanosecond.
Fiber amplifier described in the utility model is made up of fiber amplifier level, and fiber amplifier level uses forward pumping
Mode, it would however also be possible to employ the mode of backward pump；Fiber amplifier level includes the second fibre pump signal bundling device, the second quasiconductor
Pumping laser, the second Double Cladding Ytterbium Doped Fiber and the 3rd fibre optic isolater, the pumping termination of the second fibre pump signal bundling device
Second semiconductor pumped laser, the outfan of the second fibre pump signal bundling device and second Double Cladding Ytterbium Doped Fiber one end phase
Even, the second Double Cladding Ytterbium Doped Fiber other end is connected with the 3rd fibre optic isolater.
Fiber amplifier described in the utility model at least includes two fiber amplifier levels, and fiber amplifier 3 is not limited to two
Level fiber amplifier level, can increase fiber amplifier level to realize the laser of more power, higher energy.Wherein, for adjacent
Fiber amplifier level, outfan and the latter fiber pump of fiber amplifier level second of the previous fibre optic isolater of fiber amplifier level the 3rd
The input of Pu signal bundling device is connected；The input of the second fibre pump signal bundling device of first fiber amplifier level with receive
Pulse per second (PPS) seed laser outfan is connected, the outfan and synchronous light path of the 3rd fibre optic isolater of last fiber amplifier level
It is connected.
Fiber amplifier is made up of two fiber amplifier levels, wherein first fiber amplifier level includes：One the second optical fiber
Pump signal bundling device（3-2）, the outfan of the signal termination fiber optic splitter 2 of the second fibre pump signal bundling device, second
The pumping of fibre pump signal bundling device terminates the second semiconductor pumped laser（3-1）, the second fibre pump signal bundling device
Outfan and the second Double Cladding Ytterbium Doped Fiber（3-3）It is connected, the second Double Cladding Ytterbium Doped Fiber other end and the 3rd fibre optic isolater
（3-4）It is connected.Second fiber amplifier level includes：One the second fibre pump signal bundling device（3-6）, the second pumped fiber letter
The signal of number bundling device terminates the 3rd fibre optic isolater of first fiber amplifier level（3-4）Outfan, the second pumped fiber
The pumping of signal bundling device terminates the second semiconductor pumped laser（3-5）, the outfan of the second fibre pump signal bundling device with
Second Double Cladding Ytterbium Doped Fiber（3-7）It is connected, the second Double Cladding Ytterbium Doped Fiber other end and the 3rd fibre optic isolater（3-8）Phase
Even.Wherein in first fiber amplifier level of fiber amplifier 3, the second semiconductor pumped laser of employing（3-1）For optical fiber coupling
Multimode semiconductor laser is closed, operation wavelength is located at 915nm, and output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22,
Output about 20W.Using the second fibre pump signal bundling device（3-2）For（2+1）× 1 fibre pump signal bundling device,
Second Double Cladding Ytterbium Doped Fiber（3-3）, core diameter/inner cladding be 20 μm/130 μm, fibre core NA be 0.08, to laser at 915nm
Absorptance be about 3dB/m.In second fiber amplifier level of affiliated fiber amplifier 3, the second of employing is semiconductor pumped
Laser（3-5）For fiber coupling multimode semiconductor laser, positioned at 915nm, output optical fibre is 105 μm/125 μm light to operation wavelength
Fibre, fibre core NA is 0.22, output about 30W.Using fibre pump signal bundling device（3-6）For（18+1）× 1 fiber pump
Pu signal bundling device, the second Double Cladding Ytterbium Doped Fiber（3-7）, core diameter/inner cladding be 50 μm/400 μm, fibre core NA be 0.08,
2dB/m is about to the absorptance of laser at 915nm.
Synchronous light path 4 described in the utility model is passive fiber, by the length for changing passive fiber, seven road laser is entered
Row Domain Synchronous.
The input of fiber optic splitter described in the utility model and the fibre optic isolater of nanosecond pulse seed source（1-7）It is defeated
Go out end connection, nanosecond pulse is divided into N by fiber optic splitter（N>2）Beam, fiber optic splitter can be one（1×N）Fiber beam splitting
Device, it is also possible to be to be made up of multiple beam splitters.For example, when needing that nanosecond pulse is divided into into 7 beam with fiber optic splitter, can adopt
With one（1×7）Fiber optic splitter, it is also possible to by one（1×3）Fiber optic splitter and one（1×4）Fiber optic splitter is adopted
Coordinate.
This utility model optical-fiber bundling device is N × 1 fiber laser combiner, N roads can be swashed into combiner and enter one
Optical fiber.
Laser delivery 6 described in the utility model is quartz glass end cap, and suppression is coated with tilt angle and in end face in 8 degree
Make self-oscillatory flashlight antireflection film.
Traditional nanosecoud pulse laser, due to being limited by factors such as nonlinear effect, energy stores, pulse energy
Typically in more than ten MJs of magnitudes, mean power this greatly limits pulse optical fiber in laser in two or three hectowatt magnitude
The application in the fields such as cleaning.A few road nanosecond pulse optical-fiber lasers are carried out conjunction beam by this utility model by swashing combiner technology, are obtained
The nanosecond pulse optical fiber laser that a kilowatt magnitude, pulse energy reach hundred MJs of magnitudes is reached to mean power；It is simultaneously whole to be
System realizes all-fiber, possesses big mean power height, pulse energy, small volume, easy care, reliable and stable excellent in performance.
In the test of embodiment, we are carried out by the ps pulsed laser and ns pulsed laser to 7 beam pulse energy about 15mJ, mean power about 150W
Incoherent conjunction beam, has obtained pulse energy and reaches 100mJ, mean power and reach the high pulse energy of 1000W, high-average power to receive
Pulse per second (PPS) optical fiber laser.
Description of the drawings
Fig. 1 is a kind of structure chart diagram of the present utility model.
Labelling in figure：Nanosecond pulse seed laser 1, fiber optic splitter 2, fiber amplifier 3, synchronous light path 4, optical-fiber bundling
Device 5, laser delivery 6.
Fig. 2 is a kind of structure chart diagram of nanosecond pulse seed laser.
Labelling in figure：Semiconductor pumped laser 1-1, fibre pump signal bundling device 1-2, high anti-fiber grating 1-3, double-contracting
Layer Yb dosed optical fiber 1-4, acousto-optic modulator 1-5, low anti-fiber grating 1-6, fibre optic isolater 1-7.
Fig. 3 is another kind of structure chart diagram of nanosecond pulse seed laser.
Labelling in figure：Fiber coupling butterfly semiconductor laser 8, pulse current driver 7, Double Cladding Ytterbium Doped Fiber, light
Fiber isolator
Fig. 4 is a kind of structure chart diagram of fiber amplifier that this utility model is related to.
Labelling in figure：Semiconductor pumped laser 3-1, fibre pump signal bundling device 3-2, Double Cladding Ytterbium Doped Fiber 3-3, light
Fiber isolator 3-4, semiconductor pumped laser 3-5, fibre pump signal bundling device 3-6, Double Cladding Ytterbium Doped Fiber 3-7, optical fiber every
From device 3-8.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model will be further described：
A kind of high-energy nanosecond pulse full-optical-fiber laser based on incoherent conjunction beam, it is characterised in that be provided with nanosecond pulse
Seed laser 1, fiber optic splitter 2, fiber amplifier 3, synchronous light path 4, optical-fiber bundling device 5 and laser delivery 6, the nanosecond
The outfan of pulse seed laser is connected with the input of fiber optic splitter, and fiber optic splitter is provided with no less than 2 branch outputs
End, each branch outfan of fiber optic splitter is respectively equipped with corresponding fiber amplifier, and fiber optic splitter is to nanosecond pulse seed
The optical signal that laser is sent is carried out after branch, each branch optical signal of fiber optic splitter is amplified respectively, fiber beam splitting
The each branch outfan of device is connected respectively with the input of corresponding fiber amplifier, the outfan difference Jing of each fiber amplifier
Synchronous light path is connected with optical-fiber bundling device input, and the outfan of optical-fiber bundling device is connected with laser delivery.
Nanosecond pulse seed laser described in the utility model can be a kind of actively Q-switched optical fiber laser, or its
He can provide the laser instrument of nanosecond laser pulses, such as can be the gain switch type pulse semiconductor laser of fiber coupling
Device, or a kind of butterfly semiconductor laser of current-regulation type, when nanosecond pulse seed laser is a kind of actively Q-switched optical fiber
During laser instrument, its nanosecond pulse seed laser is a kind of actively Q-switched optical fiber laser, and the actively Q-switched optical fiber laser includes the
Semiconductor pumping laser（1-1）, fibre pump signal bundling device (1-2), the first Double Cladding Ytterbium Doped Fiber（1-4）, it is high reflective
Fine grating（1-3）, fiber coupling acousto-optic modulator（1-5）, low anti-fiber grating (1-6) and the first fibre optic isolater (1-7), its
In the first semiconductor pumped laser（1-1）It is connected with the pumping end of fibre pump signal bundling device (1-2), fibre pump signal is closed
The signal input fiber end face of beam device (1-2) is chamfer, signal output optical fiber and the height of fibre pump signal bundling device (1-2)
Anti- fiber grating（1-3）One end is connected, high anti-fiber grating（1-3）The other end and first Double Cladding Ytterbium Doped Fiber one end（1-
4）Connection, the first Double Cladding Ytterbium Doped Fiber（1-4）The other end and fiber coupling acousto-optic modulator（1-5）Connection, fiber coupling sound
Photomodulator（1-5）Output optical fibre is connected with low anti-fiber grating (1-6), low anti-fiber grating (1-6) other end and the first light
The input optical fibre welding of fiber isolator (1-7)；When the butterfly quasiconductor that nanosecond pulse seed laser is a kind of current-regulation type swashs
Light device, including pulse current driver 7, fiber coupling butterfly semiconductor laser 8, output optical fibre and the second fibre optic isolater,
Fiber coupling butterfly semiconductor laser passages through which vital energy circulates is rushed after current driver driving, exports 1 micron waveband laser, fiber coupling butterfly
Semiconductor laser Jing output optical fibres are connected with the input of the second fibre optic isolater.What nanosecond pulse seed laser can be exported
, to hundreds of KHz, pulse width is from tens nanoseconds to the pulse laser of hundreds of nanosecond for a few KHz of repetition rate.
Fiber amplifier described in the utility model is made up of fiber amplifier level, and fiber amplifier level uses forward pumping
Mode, it would however also be possible to employ the mode of backward pump；Fiber amplifier level includes the second fibre pump signal bundling device, the second quasiconductor
Pumping laser, the second Double Cladding Ytterbium Doped Fiber and the 3rd fibre optic isolater, the pumping termination of the second fibre pump signal bundling device
Second semiconductor pumped laser, the outfan of the second fibre pump signal bundling device and second Double Cladding Ytterbium Doped Fiber one end phase
Even, the second Double Cladding Ytterbium Doped Fiber other end is connected with the 3rd fibre optic isolater.
Fiber amplifier described in the utility model at least includes two fiber amplifier levels, and fiber amplifier 3 is not limited to two
Level fiber amplifier level, can increase fiber amplifier level to realize the laser of more power, higher energy.Wherein, for adjacent
Fiber amplifier level, outfan and the latter fiber pump of fiber amplifier level second of the previous fibre optic isolater of fiber amplifier level the 3rd
The input of Pu signal bundling device is connected；The input of the second fibre pump signal bundling device of first fiber amplifier level with receive
Pulse per second (PPS) seed laser outfan is connected, the outfan and synchronous light path of the 3rd fibre optic isolater of last fiber amplifier level
It is connected.
Synchronous light path 4 described in the utility model is passive fiber, by the length for changing passive fiber, seven road laser is entered
Row Domain Synchronous.
The input of fiber optic splitter described in the utility model 2 and the fibre optic isolater of nanosecond pulse seed source 1（1-7）'s
Outfan connects, and nanosecond pulse is divided into N by fiber optic splitter（N>2）Beam, fiber optic splitter can be one（1×N）Optical fiber point
Beam device, it is also possible to be to be made up of multiple beam splitters.For example, when needing that nanosecond pulse is divided into into 7 beam with fiber optic splitter, can be with
Using one（1×7）Fiber optic splitter, it is also possible to by one（1×3）Fiber optic splitter and one（1×4）Fiber optic splitter is adopted
With cooperation.
This utility model optical-fiber bundling device is N × 1 fiber laser combiner, N roads can be swashed into combiner and enter one
Optical fiber.
Laser delivery 6 described in the utility model is quartz glass end cap, and suppression is coated with tilt angle and in end face in 8 degree
Make self-oscillatory flashlight antireflection film.
Traditional nanosecoud pulse laser, due to being limited by factors such as nonlinear effect, energy stores, pulse energy
Typically in more than ten MJs of magnitudes, mean power this greatly limits pulse optical fiber in laser in two or three hectowatt magnitude
The application in the fields such as cleaning.A few road nanosecond pulse optical-fiber lasers are carried out conjunction beam by this utility model by swashing combiner technology, are obtained
The nanosecond pulse optical fiber laser that a kilowatt magnitude, pulse energy reach hundred MJs of magnitudes is reached to mean power；It is simultaneously whole to be
System realizes all-fiber, possesses big mean power height, pulse energy, small volume, easy care, reliable and stable excellent in performance.
In the test of embodiment, we are carried out by the ps pulsed laser and ns pulsed laser to 7 beam pulse energy about 15mJ, mean power about 150W
Incoherent conjunction beam, has obtained pulse energy and reaches 100mJ, mean power and reach the high pulse energy of 1000W, high-average power to receive
Pulse per second (PPS) optical fiber laser.
Embodiment one
A kind of high-energy nanosecond pulse full-optical-fiber laser based on incoherent conjunction beam, it is characterised in that be provided with nanosecond pulse
Seed laser 1, fiber optic splitter 2, fiber amplifier 3, synchronous light path 4, optical-fiber bundling device 5 and laser delivery 6, the nanosecond
The outfan of pulse seed laser is connected with the input of fiber optic splitter, and fiber optic splitter is provided with 7 branch outfans, optical fiber
The each branch outfan of beam splitter is respectively equipped with corresponding fiber amplifier, and fiber optic splitter is sent out nanosecond pulse seed laser
The optical signal for going out is carried out after branch, each branch optical signal of fiber optic splitter is amplified respectively, each branch of fiber optic splitter
Outfan is connected respectively with the input of corresponding fiber amplifier, and the outfan of each fiber amplifier distinguishes synchronized light path
It is connected with optical-fiber bundling device input, the outfan of optical-fiber bundling device is connected with laser delivery.
Wherein, actively Q-switched optical fiber laser includes the first semiconductor pumped laser（1-1）, fibre pump signal bundling device
(1-2), the first Double Cladding Ytterbium Doped Fiber（1-4）, high anti-fiber grating（1-3）, fiber coupling acousto-optic modulator（1-5）, it is low anti-
Fiber grating (1-6) and the first fibre optic isolater (1-7), wherein the first semiconductor pumped laser（1-1）With fibre pump signal
The pumping end connection of bundling device (1-2), the signal input fiber end face of fibre pump signal bundling device (1-2) is chamfer, light
The signal output optical fiber of fine pump signal bundling device (1-2) and high anti-fiber grating（1-3）One end is connected, high anti-fiber grating
（1-3）The other end and first Double Cladding Ytterbium Doped Fiber one end（1-4）Connection, the first Double Cladding Ytterbium Doped Fiber（1-4）The other end with
Fiber coupling acousto-optic modulator（1-5）Connection, fiber coupling acousto-optic modulator（1-5）Output optical fibre and low anti-fiber grating (1-
6) connect, the input optical fibre welding of low anti-fiber grating (1-6) other end and the first fibre optic isolater (1-7).Nanosecond pulse kind
, to hundreds of KHz, pulse width is from tens nanoseconds to the arteries and veins of hundreds of nanosecond for a few KHz of repetition rate that sub- laser can be exported
Impulse light.
Fiber amplifier described in the present embodiment is made up of two fiber amplifier levels, and fiber amplifier level uses forward pumping
Mode, fiber amplifier is made up of two fiber amplifier levels, wherein first fiber amplifier level includes：One the second fiber pump
Pu signal bundling device（3-2）, the outfan of the signal termination fiber optic splitter 2 of the second fibre pump signal bundling device, the second light
The pumping of fine pump signal bundling device terminates the second semiconductor pumped laser（3-1）, the second fibre pump signal bundling device it is defeated
Go out end and the second Double Cladding Ytterbium Doped Fiber（3-3）It is connected, the second Double Cladding Ytterbium Doped Fiber other end and the 3rd fibre optic isolater（3-
4）It is connected.Second fiber amplifier level includes：One the second fibre pump signal bundling device（3-6）, the second fibre pump signal
The signal of bundling device terminates the 3rd fibre optic isolater of first fiber amplifier level（3-4）Outfan, the second pumped fiber letter
The pumping of number bundling device terminates the second semiconductor pumped laser（3-5）, the outfan of the second fibre pump signal bundling device and
Two Double Cladding Ytterbium Doped Fibers（3-7）It is connected, the second Double Cladding Ytterbium Doped Fiber other end and the 3rd fibre optic isolater（3-8）It is connected.
Wherein in first fiber amplifier level of fiber amplifier 3, the second semiconductor pumped laser of employing（3-1）It is many for fiber coupling
Mould semiconductor laser, operation wavelength is located at 915nm, and output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22, output
Power about 20W.Using the second fibre pump signal bundling device（3-2）For（2+1）× 1 fibre pump signal bundling device, second
Double Cladding Ytterbium Doped Fiber（3-3）, core diameter/inner cladding be 20 μm/130 μm, fibre core NA be 0.08, the suction to laser at 915nm
Receive coefficient and be about 3dB/m.In second fiber amplifier level of affiliated fiber amplifier 3, the second semiconductor pumped laser of employing
（3-5）For fiber coupling multimode semiconductor laser, positioned at 915nm, output optical fibre is 105 μm/125 μm optical fiber to operation wavelength,
Fibre core NA is 0.22, output about 30W.Using fibre pump signal bundling device（3-6）For（18+1）× 1 pumped fiber is believed
Number bundling device, the second Double Cladding Ytterbium Doped Fiber（3-7）, core diameter/inner cladding be 50 μm/400 μm, fibre core NA be 0.08, it is right
The absorptance of laser is about 2dB/m at 915nm.
Additionally, synchronous light path 4 is passive fiber described in the present embodiment, by the length for changing passive fiber, to seven tunnels
Laser carries out Domain Synchronous.The input of fiber optic splitter described in the utility model and the fibre optic isolater of nanosecond pulse seed source
（1-7）Outfan connection, nanosecond pulse is divided into 7 beams by fiber optic splitter, and fiber optic splitter 2 is one（1×7）Fiber beam splitting
Device 2.Optical-fiber bundling device is 7 × 1 fiber laser combiners, 7 roads can be swashed into combiner and enter an optical fiber.This utility model
The laser delivery 6 is quartz glass end cap, and the self-oscillatory flashlight of suppression is coated with tilt angle and in end face in 8 degree
Antireflection film.
Using said structure, this utility model can obtain 100mJ, the ps pulsed laser and ns pulsed laser of 1000W, it is sufficient to for aviation
The high-end laser cleaning application market such as space flight, extra large frock be standby.
Embodiment two
A kind of high-energy nanosecond pulse full-optical-fiber laser based on incoherent conjunction beam, it is characterised in that be provided with nanosecond pulse
Seed laser 1, fiber optic splitter 2, fiber amplifier 3, synchronous light path 4, optical-fiber bundling device 5 and laser delivery 6, the nanosecond
The outfan of pulse seed laser is connected with the input of fiber optic splitter, and fiber optic splitter is provided with no less than 2 branch outputs
End, each branch outfan of fiber optic splitter is respectively equipped with corresponding fiber amplifier, and fiber optic splitter is to nanosecond pulse seed
The optical signal that laser is sent is carried out after branch, each branch optical signal of fiber optic splitter is amplified respectively, fiber beam splitting
The each branch outfan of device is connected respectively with the input of corresponding fiber amplifier, the outfan difference Jing of each fiber amplifier
Synchronous light path is connected with optical-fiber bundling device input, and the outfan of optical-fiber bundling device is connected with laser delivery.
Nanosecond pulse seed laser described in the present embodiment is a kind of butterfly semiconductor laser of current-regulation type, including arteries and veins
Rush current driver 7, fiber coupling butterfly semiconductor laser 8, output optical fibre and the second fibre optic isolater, fiber coupling butterfly
Semiconductor laser passages through which vital energy circulates is rushed after current driver driving, exports 1 micron waveband laser, fiber coupling butterfly semiconductor laser
Jing output optical fibres are connected with the input of the second fibre optic isolater.The repetition rate that nanosecond pulse seed laser can be exported is thousand of
, to hundreds of KHz, pulse width is from tens nanoseconds to the pulse laser of hundreds of nanosecond for hertz.
Fiber amplifier described in the present embodiment is made up of 3 fiber amplifier levels, and fiber amplifier level includes fibre pump signal
Bundling device, semiconductor pumped laser, Double Cladding Ytterbium Doped Fiber, fibre optic isolater, wherein the outfan of the first amplifier stage and second
The input of fiber amplifier level the second fibre pump signal bundling device is connected, the outfan of the second amplifier stage and the 3rd fiber amplifier
The input of the second fibre pump signal bundling device of level is connected, the second fibre pump signal bundling device of the first fiber amplifier level
Input is connected with nanosecond pulse seed laser outfan, the outfan of the 3rd fibre optic isolater of the 3rd fiber amplifier level with it is same
Step light path is connected.
In first fiber amplifier level of fiber amplifier 3 described in the present embodiment, the second of employing is semiconductor pumped sharp
Light be fiber coupling multimode semiconductor laser, operation wavelength be located at 915nm, output optical fibre be 105 μm/125 μm optical fiber, fibre core
NA is 0.22, output about 10W.The the second fibre pump signal bundling device for adopting can be for（1+1）× 1 fibre pump signal
Bundling device, the core diameter/inner cladding of Double Cladding Ytterbium Doped Fiber is 10 μm/130 μm, and fibre core NA is 0.08, the suction to laser at 915nm
Receive coefficient and be about 1.3dB/m.
In second fiber amplifier level, the second semiconductor pumped laser for adopting is for fiber coupling multiple die semiconductor laser
Device, operation wavelength is located at 915nm, and output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22, output about 20W.Adopt
Second fibre pump signal bundling device can be（2+1）× 1 pump signal bundling device, the core diameter of Double Cladding Ytterbium Doped Fiber/
Inner cladding is 20 μm/130 μm, and fibre core NA is 0.08, and to the absorptance of laser at 915nm 3dB/m is about.
In 3rd fiber amplifier level, the second semiconductor pumped laser for adopting is for fiber coupling multiple die semiconductor laser
Device, operation wavelength is located at 915nm, and output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22, output about 30W.Adopt
Second fibre pump signal bundling device is（18+1）× 1 fibre pump signal bundling device, the core diameter of Double Cladding Ytterbium Doped Fiber/
Inner cladding is 50 μm/400 μm, and fibre core NA is 0.08, and to the absorptance of laser at 915nm 2dB/m is about.
Additionally, synchronous light path 4 is passive fiber described in the present embodiment, by the length for changing passive fiber, to seven tunnels
Laser carries out Domain Synchronous.The input of fiber optic splitter described in the utility model and the fibre optic isolater of nanosecond pulse seed source
（1-7）Outfan connection, nanosecond pulse is divided into 7 beams by fiber optic splitter, and fiber optic splitter 2 is one（1×7）Fiber beam splitting
Device 2.Optical-fiber bundling device is 7 × 1 fiber laser combiners, 7 roads can be swashed into combiner and enter an optical fiber.This utility model
The laser delivery 6 is quartz glass end cap, and the self-oscillatory flashlight of suppression is coated with tilt angle and in end face in 8 degree
Antireflection film.
Using said structure, this utility model can obtain 100mJ, the ps pulsed laser and ns pulsed laser of 1000W, it is sufficient to for aviation
The high-end laser cleaning application market such as space flight, extra large frock be standby.
Embodiment three
A kind of high-energy nanosecond pulse full-optical-fiber laser based on incoherent conjunction beam, it is characterised in that be provided with nanosecond pulse
Seed laser 1, fiber optic splitter 2, fiber amplifier 3, synchronous light path 4, optical-fiber bundling device 5 and laser delivery 6, the nanosecond
The outfan of pulse seed laser is connected with the input of fiber optic splitter, and fiber optic splitter is provided with 7 branch outfans, optical fiber
The each branch outfan of beam splitter is respectively equipped with corresponding fiber amplifier, and fiber optic splitter is sent out nanosecond pulse seed laser
The optical signal for going out is carried out after branch, each branch optical signal of fiber optic splitter is amplified respectively, each branch of fiber optic splitter
Outfan is connected respectively with the input of corresponding fiber amplifier, and the outfan of each fiber amplifier distinguishes synchronized light path
It is connected with optical-fiber bundling device input, the outfan of optical-fiber bundling device is connected with laser delivery.
Wherein, actively Q-switched optical fiber laser includes the first semiconductor pumped laser（1-1）, fibre pump signal bundling device
(1-2), the first Double Cladding Ytterbium Doped Fiber（1-4）, high anti-fiber grating（1-3）, fiber coupling acousto-optic modulator（1-5）, it is low anti-
Fiber grating (1-6) and the first fibre optic isolater (1-7), wherein the first semiconductor pumped laser（1-1）With fibre pump signal
The pumping end connection of bundling device (1-2), the signal input fiber end face of fibre pump signal bundling device (1-2) is chamfer, light
The signal output optical fiber of fine pump signal bundling device (1-2) and high anti-fiber grating（1-3）One end is connected, high anti-fiber grating
（1-3）The other end and first Double Cladding Ytterbium Doped Fiber one end（1-4）Connection, the first Double Cladding Ytterbium Doped Fiber（1-4）The other end with
Fiber coupling acousto-optic modulator（1-5）Connection, fiber coupling acousto-optic modulator（1-5）Output optical fibre and low anti-fiber grating (1-
6) connect, the input optical fibre welding of low anti-fiber grating (1-6) other end and the first fibre optic isolater (1-7).Nanosecond pulse kind
, to hundreds of KHz, pulse width is from tens nanoseconds to the arteries and veins of hundreds of nanosecond for a few KHz of repetition rate that sub- laser can be exported
Impulse light.
Fiber amplifier described in the present embodiment is made up of two fiber amplifier levels, and fiber amplifier level uses forward pumping
Mode, wherein first fiber amplifier level includes：One the second fibre pump signal bundling device（3-2）, the second pumped fiber
The signal of signal bundling device terminates the outfan of fiber optic splitter 2, the pumping termination second of the second fibre pump signal bundling device
Semiconductor pumped laser（3-1）, the outfan and the second Double Cladding Ytterbium Doped Fiber of the second fibre pump signal bundling device（3-3）Phase
Even, the second Double Cladding Ytterbium Doped Fiber other end and the 3rd fibre optic isolater（3-4）It is connected.Second fiber amplifier level includes：One
Individual second fibre pump signal bundling device（3-6）, signal first fiber amplifier of termination of the second fibre pump signal bundling device
3rd fibre optic isolater of level（3-4）Outfan, the pumping of the second fibre pump signal bundling device terminates the second semiconductor pump
Pu laser（3-5）, the outfan and the second Double Cladding Ytterbium Doped Fiber of the second fibre pump signal bundling device（3-7）It is connected, second
The Double Cladding Ytterbium Doped Fiber other end and the 3rd fibre optic isolater（3-8）It is connected.Wherein first fiber amplifier of fiber amplifier 3
In level, the second semiconductor pumped laser of employing（3-1）For fiber coupling multimode semiconductor laser, operation wavelength is located at
915nm, output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22, output about 20W.Using the second pumped fiber
Signal bundling device（3-2）For（2+1）× 1 fibre pump signal bundling device, the second Double Cladding Ytterbium Doped Fiber（3-3）, core diameter/interior
Covering is 20 μm/130 μm, and fibre core NA is 0.08, and to the absorptance of laser at 915nm 3dB/m is about.Affiliated fiber amplifier
In 3 second fiber amplifier level, the second semiconductor pumped laser of employing（3-5）For fiber coupling multiple die semiconductor laser
Device, operation wavelength is located at 915nm, and output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22, output about 30W.Adopt
Fibre pump signal bundling device（3-6）For（18+1）× 1 fibre pump signal bundling device, the second Double Cladding Ytterbium Doped Fiber
（3-7）, core diameter/inner cladding be 50 μm/400 μm, fibre core NA be 0.08,2dB/ is about to the absorptance of laser at 915nm
m。
Additionally, synchronous light path 4 is passive fiber described in the present embodiment, by the length for changing passive fiber, to seven tunnels
Laser carries out Domain Synchronous.The input of fiber optic splitter described in the utility model and the fibre optic isolater of nanosecond pulse seed source
（1-7）Outfan connection, nanosecond pulse is divided into 5 beams by fiber optic splitter, and fiber optic splitter 2 is one（1×5）Fiber beam splitting
Device 2.Optical-fiber bundling device is 5 × 1 fiber laser combiners, 5 roads can be swashed into combiner and enter an optical fiber.This utility model
The laser delivery 6 is quartz glass end cap, and the self-oscillatory flashlight of suppression is coated with tilt angle and in end face in 8 degree
Antireflection film.
Using said structure, this utility model can obtain 100mJ, the ps pulsed laser and ns pulsed laser of 1000W, it is sufficient to for aviation
The high-end laser cleaning application market such as space flight, extra large frock be standby.
Claims (10)
1. it is a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, it is characterised in that to be provided with nanosecond pulse kind
Sub- laser, fiber optic splitter, fiber amplifier, synchronous light path, optical-fiber bundling device and laser delivery, the nanosecond pulse seed
The outfan of laser is connected with the input of fiber optic splitter, and fiber optic splitter is provided with no less than 2 branch outfans, optical fiber point
The each branch outfan of beam device is respectively equipped with corresponding fiber amplifier, and each branch optical signal of fiber optic splitter is carried out respectively
Amplify, each branch outfan of fiber optic splitter is connected respectively with the input of corresponding fiber amplifier, each fiber amplifier
Outfan distinguish synchronized light path and be connected with optical-fiber bundling device input, the outfan and laser delivery company of optical-fiber bundling device
Connect.
2. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 1
Be nanosecond pulse seed laser be a kind of actively Q-switched optical fiber laser, the actively Q-switched optical fiber laser includes the first quasiconductor
Pumping laser, fibre pump signal bundling device, the first Double Cladding Ytterbium Doped Fiber, high anti-fiber grating, fiber coupling acousto-optic modulation
Device, low anti-fiber grating and the first fibre optic isolater, wherein the first semiconductor pumped laser and fibre pump signal bundling device
Pumping end connects, and the signal input fiber end face of fibre pump signal bundling device is chamfer, fibre pump signal bundling device
Signal output optical fiber is connected with high anti-fiber grating one end, the high anti-fiber grating other end and the first Double Cladding Ytterbium Doped Fiber one
End connection, the first Double Cladding Ytterbium Doped Fiber other end is connected with fiber coupling acousto-optic modulator, and fiber coupling acousto-optic modulator is defeated
Go out optical fiber to be connected with low anti-fiber grating, the input optical fibre of the low anti-fiber grating other end and the first fibre optic isolater is welded on one
Rise.
3. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 1
Be nanosecond pulse seed laser be a kind of current-regulation type butterfly semiconductor laser, including pulse current driver, light
Fibre coupling butterfly semiconductor laser, output optical fibre and the second fibre optic isolater, fiber coupling butterfly semiconductor laser passages through which vital energy circulates
After rushing current driver driving, 1 micron waveband laser, fiber coupling butterfly semiconductor laser Jing output optical fibres and second are exported
The input connection of fibre optic isolater.
4. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 1
It is that fiber amplifier is made up of fiber amplifier level, fiber amplifier level includes that the second fibre pump signal bundling device, the second half lead
Body pumping laser, the second Double Cladding Ytterbium Doped Fiber and the 3rd fibre optic isolater, the pumping end of the second fibre pump signal bundling device
Connect the second semiconductor pumped laser, the outfan of the second fibre pump signal bundling device and second Double Cladding Ytterbium Doped Fiber one end phase
Even, the second Double Cladding Ytterbium Doped Fiber other end is connected with the 3rd fibre optic isolater.
5. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 4
It is that fiber amplifier at least includes two fiber amplifier levels, wherein, for adjacent fiber amplifier level, previous fiber amplifier
The outfan of the 3rd fibre optic isolater of level is connected with the input of latter fiber amplifier level the second fibre pump signal bundling device；
The input of the second fibre pump signal bundling device of first fiber amplifier level is connected with nanosecond pulse seed laser outfan,
The outfan of the 3rd fibre optic isolater of last fiber amplifier level is connected with synchronous light path.
6. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 4
It is that fiber amplifier is made up of two fiber amplifier levels, wherein first fiber amplifier level includes：One the second pumped fiber
Signal bundling device, the signal of the second fibre pump signal bundling device terminates the outfan of fiber optic splitter, the second pumped fiber letter
The pumping of number bundling device terminates the second semiconductor pumped laser, the outfan of the second fibre pump signal bundling device and the second double-contracting
Layer Yb dosed optical fiber is connected, and the second Double Cladding Ytterbium Doped Fiber other end is connected with the 3rd fibre optic isolater；Second fiber amplifier level
Including：One the second fibre pump signal bundling device, the signal of the second fibre pump signal bundling device terminates first optical fiber and puts
The outfan of the 3rd fibre optic isolater of big level, the pumping termination second of the second fibre pump signal bundling device is semiconductor pumped to swash
Light, the outfan of the second fibre pump signal bundling device is connected with the second Double Cladding Ytterbium Doped Fiber, the second Double Cladding Ytterbium Doped Fiber
The other end is connected with the 3rd fibre optic isolater.
7. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 6
Be fiber amplifier first fiber amplifier level in, the second semiconductor pumped laser for adopting partly is led for fiber coupling multimode
Body laser, operation wavelength is located at 915nm, and output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22, and output is about
20W；The the second fibre pump signal bundling device for adopting for（2+1）× 1 fibre pump signal bundling device, the second double clad mixes ytterbium light
Fibre, core diameter/inner cladding be 20 μm/130 μm, fibre core NA be 0.08,3dB/m is about to the absorptance of laser at 915nm.
8. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 6
Be fiber amplifier second fiber amplifier level in, the second semiconductor pumped laser for adopting partly is led for fiber coupling multimode
Body laser, operation wavelength is located at 915nm, and output optical fibre is 105 μm/125 μm optical fiber, and fibre core NA is 0.22, and output is about
30W；Using fibre pump signal bundling device（18+1）× 1 fibre pump signal bundling device, the second Double Cladding Ytterbium Doped Fiber,
Core diameter/inner cladding is 50 μm/400 μm, and fibre core NA is 0.08, and to the absorptance of laser at 915nm 2dB/m is about.
9. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 1
Be synchronous light path 4 be passive fiber, by change passive fiber length, Domain Synchronous are carried out to seven road laser.
10. a kind of based on the incoherent high-energy nanosecond pulse full-optical-fiber laser for closing beam, its feature according to claim 1
It is that laser delivery 6 is quartz glass end cap, the self-oscillatory flashlight of suppression is coated with tilt angle and in end face in 8 degree
Antireflection film.
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| CN108923233A (en) * | 2018-08-16 | 2018-11-30 | 深圳番越光电有限公司 | A kind of high energy all -fiber nanosecond laser for away rust by laser |
| CN109818242A (en) * | 2019-02-22 | 2019-05-28 | 四川沃飞光电科技有限公司 | Pulsewidth and the humorous ps pulsed laser and ns pulsed laser light-source structure of power adjustable |
| WO2020168733A1 (en) * | 2019-02-22 | 2020-08-27 | 江苏沃飞激光技术有限公司 | Nanosecond pulsed laser light source structure having tunable pulse width and power |
| CN112290362A (en) * | 2020-10-30 | 2021-01-29 | 山东海富光子科技股份有限公司 | High-power high-energy pulse all-fiber laser for laser cleaning |
| CN113809623A (en) * | 2021-09-15 | 2021-12-17 | 山东海富光子科技股份有限公司 | Continuous pulse composite mode high-power all-fiber laser system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923233A (en) * | 2018-08-16 | 2018-11-30 | 深圳番越光电有限公司 | A kind of high energy all -fiber nanosecond laser for away rust by laser |
| CN108923233B (en) * | 2018-08-16 | 2019-12-06 | 深圳番越光电有限公司 | Large pulse energy all-fiber nanosecond laser for laser rust removal |
| CN109818242A (en) * | 2019-02-22 | 2019-05-28 | 四川沃飞光电科技有限公司 | Pulsewidth and the humorous ps pulsed laser and ns pulsed laser light-source structure of power adjustable |
| WO2020168733A1 (en) * | 2019-02-22 | 2020-08-27 | 江苏沃飞激光技术有限公司 | Nanosecond pulsed laser light source structure having tunable pulse width and power |
| CN112290362A (en) * | 2020-10-30 | 2021-01-29 | 山东海富光子科技股份有限公司 | High-power high-energy pulse all-fiber laser for laser cleaning |
| CN113809623A (en) * | 2021-09-15 | 2021-12-17 | 山东海富光子科技股份有限公司 | Continuous pulse composite mode high-power all-fiber laser system |
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