CN207442177U - Optical fiber laser - Google Patents
Optical fiber laser Download PDFInfo
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- CN207442177U CN207442177U CN201721517864.6U CN201721517864U CN207442177U CN 207442177 U CN207442177 U CN 207442177U CN 201721517864 U CN201721517864 U CN 201721517864U CN 207442177 U CN207442177 U CN 207442177U
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Abstract
This application involves a kind of optical fiber lasers, and the controller being stopped after first pulse is sent including semiconductor laser, fiber resonance cavity and control semiconductor laser；The input terminal of controller and semiconductor laser connects, and the output terminal of semiconductor laser and the input terminal of fiber resonance cavity connect, the output terminal output laser of fiber resonance cavity.Above-mentioned optical fiber laser, semiconductor laser is as pumping source, pump energy is provided, controller is connected with semiconductor laser, the semiconductor laser is controlled to be stopped after first pulse is sent, so that in the semiconductor laser relaxation oscillation stage, only sends first pulse for pumping, and avoid generating train of pulse below, realize controllable pulse output.Above-mentioned optical fiber laser can work in repetition frequency range, and output is stablized, and luminous efficiency is high；And pulser or electrical modulation single mode semiconductor laser need not be selected, and it is simple in structure, it is at low cost.
Description
Technical field
This application involves field of laser device technology, more particularly to a kind of optical fiber laser.
Background technology
With the development of laser technique, the species of laser is more and more, such as gas laser, solid state laser, half
Conductor laser etc..Wherein, optical fiber laser has become one of main industrial laser in the whole world, compared to semiconductor laser
Device, conventional solid laser and CO2Laser, optical fiber laser global industry market occupation rate more than 50%.According to
Laser exports the characteristic in time domain, and optical fiber laser can be divided into pulse laser and continuous wave laser.Continuous wave laser exists
In working time, lasting has laser output.Pulse laser is then the interior laser output that interruption is presented at work, and
Light extraction has periodically with not light extraction in time domain.Compared with continuous light laser, the advantage of pulse laser is light energy
Output is concentrated in a short time so that laser at this time has a very high energy density, the laser of these high-energy densities can be with
Realize many functions, for example, with material strong effect, smash material molecule key, generate nonlinear effect etc. with crystal, this makes
Obtaining pulse laser has wide application field.
There are mainly three types of traditional pulse optical fiber implementation methods, is Q-regulating technique, mode-locking technique and MOPA respectively
Technology (Master Oscillator Power-Amplifier, master oscillator power amplifier).Wherein, Q-regulating technique
Output pulse easily deteriorates and causes luminous efficiency low；Mode-locking technique need it is additional select pulser, and select pulser knot
Structure is complex；MOPA technologies need to realize by the expensive single mode semiconductor laser of electrical modulation, of high cost.
Utility model content
Based on this, it is necessary in view of the above-mentioned problems, provide it is a kind of it is simple in structure, luminous efficiency can be improved and reduce cost
Optical fiber laser.
A kind of optical fiber laser is sent including semiconductor laser, fiber resonance cavity and the control semiconductor laser
The controller being stopped after first pulse；
The controller is connected with the input terminal of the semiconductor laser, the output terminal of the semiconductor laser and institute
State the input terminal connection of fiber resonance cavity, the output terminal output laser of the fiber resonance cavity.
In one embodiment, the fiber resonance cavity includes Active Optical Fiber resonant cavity mirror, and the resonator mirror includes
First resonator mirror and the second resonator mirror；
The first end of the Active Optical Fiber is connected with the output terminal of the semiconductor laser, first resonator mirror
First end is connected with the first end of the Active Optical Fiber, and the second end of first resonator mirror exports the laser, and described the
Two resonator mirrors are connected with the second end of the Active Optical Fiber.
In one embodiment, the Active Optical Fiber includes single cladded-fiber or doubly clad optical fiber.
In one embodiment, the Active Optical Fiber includes rare earth doped fiber, dyestuff optical fiber and superfluorescent fiber
In any one.
In one embodiment, the resonator mirror includes any one in speculum, fiber grating and fiber optic loop.
In one embodiment, first resonator mirror includes low reflective grid, and second resonator mirror includes high anti-
Grating.
In one embodiment, the controller includes any one in FPGA, DSP and microcontroller.
In one embodiment, bundling device is further included, the input terminal of the bundling device is defeated with the semiconductor laser
Outlet connects, and the output terminal of the bundling device is connected with the first end of the Active Optical Fiber.
In one embodiment, a length of 12 meters of the chamber of the fiber resonance cavity.
In one embodiment, the reflectivity of the low reflective grid is 8%.
Above-mentioned optical fiber laser, semiconductor laser are connected with fiber resonance cavity, provide pump energy as pumping source,
Controller is connected with semiconductor laser, and the semiconductor laser is controlled to be stopped after first pulse is sent, so that
The relaxation oscillation stage is in semiconductor laser, only sends first pulse for pumping, and avoids generating train of pulse below,
Realize controllable pulse output.Above-mentioned optical fiber laser can work in repetition frequency range, and output is stablized, and luminous efficiency is high；
And pulser or electrical modulation single mode semiconductor laser need not be selected, and it is simple in structure, it is at low cost.
Description of the drawings
Fig. 1 is the structure diagram of one embodiment of optical fiber laser of the application；
Fig. 2 is output light intensity and inverted population relation schematic diagram during relaxation oscillation；
Fig. 3 is the structure diagram of one embodiment of optical fiber laser of the application；
Fig. 4 is the structure diagram of one embodiment of optical fiber laser of the application；
Fig. 5 is the output waveform figure of one embodiment of optical fiber laser of the application.
Specific embodiment
Object, technical solution and advantage to make the application are more clearly understood, with reference to the accompanying drawings and embodiments, to this
Application is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the application,
The protection domain of the application is not limited.
In three kinds of pulsed optical fibre laser implementation methods of mainstream, it is to control cavity loss by Q-switch to adjust Q, in height
In intracavitary accumulation energy during loss, the big pulse of high-energy density is exported in low-loss.Laser arteries and veins is generated in this way
When rushing, in order to ensure the stabilization of intracavitary work, and inhibit spontaneous radiation (ASE), the working frequency needs of Q-switch have at one
In the range of limit, to typical optical fiber Q-switched laser, probably within 10kHz-100kHz, working frequency exceeds this scope
During scope, it can cause to export pulse degradation, efficiency reduces, the drawbacks of ASE acutely increases, while the Q-switch that Q-switched laser uses
Higher price, the Q-switch of fiber coupling, the thousands of members of domestic needs, the needs members up to ten thousand of import, cause the cost of laser compared with
It is high.
Locked mode method is the phase by controlling endovenous laser so that laser single longitudinal mode is exported so as to obtain pulse laser,
This mode is generally used for generating picosecond and following ultrashort pulse.The pulse that locked mode generates has larger difference with Q impulse
Different, working frequency is generally non-adjustable, and up to hundred MHz magnitudes, and pulse width is picosecond magnitude or shorter, and this mode generates
Pulse generally require it is additional select pulser, repetition rate is reduced, can just obtain the pulse output of high-energy density, and
Pulser is selected to be typically complex.
The pulsed light of MOPA lasers is realized by electrical modulation single mode semiconductor laser, is limited by the prior art, single
Mould semiconductor laser output power is limited, and the pulse that this mode obtains is usually mw ranks, it is necessary to be handled by pre-amplification,
And single mode semiconductor laser higher price.
In order to solve different problems present in three kinds of pulsed optical fibre laser implementation methods of above-mentioned traditional mainstream, this Shen
It please provide a kind of optical fiber laser.Fig. 1 is the structure diagram of one embodiment of optical fiber laser of the application, as shown in Figure 1,
A kind of optical fiber laser sends head including semiconductor laser 20, fiber resonance cavity 30 and the control semiconductor laser 20
The controller 10 being stopped after a pulse；
The controller 10 is connected with the input terminal of the semiconductor laser 20, the output of the semiconductor laser 20
End is connected with the input terminal of the fiber resonance cavity 30, the output terminal output laser of the fiber resonance cavity 30.
Laser generates the accumulation for needing inverted population, during laser gain medium absorptive pumping energy, increases
Beneficial medium is excited to energy level, and inverted population increases, during stimulated radiation generates signal photon, gain media hair
It penetrates photon and drops to basic energy level, inverted population reduces, in the laser cavity of steady operation, the increase and reduction of this population
It is the state of a balance.But the stage is generated in laser, it can excessively arrive the process of stable state, i.e. relaxation there are one balance is reached
Oscillation phase.When being observed with oscillograph, recording the relaxation oscillation stage, it can be found that its waveform is not a smooth light arteries and veins
Punching, but be made of the spike that many amplitudes, pulsewidth and interval are made to change at random.The mechanism of production of relaxation oscillation can determine
Property be construed to reach as particle inverted population △ n and during little over threshold value, start to generate laser, stimulated radiation makes particle inverted population
△ n decline, and when △ n drop to threshold value, laser pulse reaches peak value, and △ n are less than threshold value, and gain is less than loss, so photon
Number is reduced；But with the increase of optical pumping, △ n increase again, when reaching threshold value again, and generate second spike.
In the entire optical pumping time, this process is iteratively produced, and forms a group spike sequence.Fig. 2 is illustrated during relaxation oscillation
Output light intensity and inverted population state.Referring to Fig. 2, upper partial trace represents output intensity, and lower part curve represents reversion
Population density, transverse axis are time t.The train of pulse peak power generated during relaxation oscillation can be than output work when stablizing
Rate is much higher.
In the optical fiber laser of the present embodiment, controller 10 is used to control the work of semiconductor laser 20.Specifically, control
Device 10 processed can be FPGA (Field-Programmable Gate Array, field programmable gate array), for controlling half
Conductor laser 20 is stopped after first pulse is sent.Further, controller 10 can include laser pulse detection
Device, specifically can be with light intensity sensor, power meter or energy meter, for detecting the laser generation of semiconductor laser 20 in real time
Journey sends a control signal to FPGA after the first pulse of relaxation oscillation, turns off semiconductor laser 20 in time by FPGA, be allowed to not
Subsequent train of pulse can be generated, and only carries out pumping using first pulse, so as to realize controllable pulse output.
Pumping source of the semiconductor laser 20 as optical fiber laser provides optical fiber and is realizing population inversion distributed process
Needed for pump energy.Semiconductor laser 20 is also known as laser diode, is swashing by the use of semi-conducting material as operation material
Light device, due to the difference in the structure of matter, the detailed process that variety classes generates laser is more special.Common operation material has arsenic
Change gallium (GaAs), cadmium sulfide (CdS), indium phosphide (InP), zinc sulphide (ZnS) etc.；Energisation mode has electrical pumping, electron beam excitation
With three kinds of forms of optical pumping.
30 input terminal of fiber resonance cavity connects the output terminal of semiconductor laser 20, receives pump energy and generates laser, by
The output terminal of fiber resonance cavity 30 exports the laser of generation.Fiber resonance cavity 30 includes resonator mirror and Active Optical Fiber.Wherein,
Active Optical Fiber goes out laser for stimulated radiation, is specifically as follows rare earth-doped fiber, and Doped ions can be Nd3+、Er3+、Yb3 +And Tm3+Can be quartz glass, Zirkonium fluoride glass and monocrystalline etc. Deng, matrix.When pump light passes through the rare earth ion in optical fiber
When, it will be absorbed by rare earth ion, higher lasing energy level will be activated to by this moment absorbing the rare earth atom electronics of photon energy,
It is inverted so as to fulfill number of ions.Number of ions after reversion will be transferred to ground state with forms of radiation from high level, and release
Energy completes stimulated radiation.Optical fiber laser is actually referred to as being a wavelength converting device, can be by pumping by it
Wavelength light is converted into required excitation wavelength light.Such as the pump light of 980nm can be carried out pumping by erbium-doped fiber laser, it is defeated
Go out the laser of 1550nm.Resonator mirror provides positive feedback for the foundation of laser generation, meanwhile, the parameter of resonator mirror influences output
The quality of laser beam.Specifically, resonator mirror can include any one in speculum, fiber grating and fiber optic loop, point
Not She Yu Active Optical Fiber both ends, the laser photon that Active Optical Fiber is sent by the resonator mirror at both ends in Active Optical Fiber back and forth
Reflection, in this repeatedly reflection process, they can excite more electronics from High-Energy Orbit to low energy track jump, so as to excite
Launch the photon of more phase co-wavelengths and same phase, will then generate " waterfall " effect, and then gather rapidly in laser
A large amount of phase co-wavelengths and the photon of phase are collected, it is achieved thereby that being amplified to laser, have been obtained after output applicable strong
Laser.
Above-mentioned optical fiber laser using semiconductor laser as pumping source, is connected with fiber resonance cavity, provides pumping energy
Amount, controller are connected with semiconductor laser, and the semiconductor laser is controlled to be stopped after first pulse is sent, so that
It obtains and is in the relaxation oscillation stage in semiconductor laser, only send first pulse for pumping, and avoid generating pulse below
String realizes controllable pulse output.When above-mentioned optical fiber laser works in repetition frequency range, output is stablized, luminous efficiency
It is high；And pulser or electrical modulation single mode semiconductor laser need not be selected, and it is simple in structure, it is at low cost.
Further, as shown in figure 3, the structure diagram of one embodiment of optical fiber laser for the application.The present embodiment
In, controller 10 is connected with the input terminal of semiconductor laser 20, output terminal and the fiber resonance cavity 30 of semiconductor laser 20
Input terminal connection, fiber resonance cavity 30 output terminal output laser；Further, the fiber resonance cavity 30 includes active light
Fine 31 resonant cavity mirrors 32, the resonator mirror 32 include the first resonator mirror 321 and the second resonator mirror 322；
The first end of the Active Optical Fiber 31 is connected with the output terminal of the semiconductor laser, first resonator mirror
321 first end is connected with the first end of the Active Optical Fiber 31, and the second end output of first resonator mirror 321 is described to swash
Light, second resonator mirror 322 are connected with the second end of the Active Optical Fiber 31.
Fiber resonance cavity 30 receives pump energy stimulated radiation and sends laser.Fiber resonance cavity 30 includes 31 He of Active Optical Fiber
Resonant cavity mirror 32.Active Optical Fiber 31 generates laser as operation material.Resonator mirror 32 can radiate intracavitary Active Optical Fiber 31
Photon have consistent frequency, phase and traffic direction so that laser have good directionality and coherence；Moreover, it
The length of operation material can be shortened well, moreover it is possible to which the pattern of laser produced by being adjusted by changing cavity length is (i.e.
Modeling).Specifically, 31 stimulated radiation intensity of Active Optical Fiber is very weak, can not practical application, so need by optical resonator into
Row amplification.So-called optical resonator really at laser both ends, loads onto two pieces of very high mirrors of reflectivity face-to-face.One piece several
Total reflection, one piece of wide part reflection transmit away on a small quantity, so that laser can pass through this block mirror and project, are reflected back toward
To the light of working media, continue to induce new stimulated radiation, light is amplified.Therefore, light vibrates back and forth in resonator, the company of causing
Lock reactor is amplified as snowslide, generates strong laser, from the sub- one end output of partially reflecting mirror.Further, resonator
Mirror 32 includes the first resonator mirror 321 and the second resonator mirror 322.Wherein, the first end of Active Optical Fiber 31 is as optical fiber resonance
The input terminal of chamber 30, the first end of the first resonator mirror 321 are connected with the first end of Active Optical Fiber 31, the first resonator mirror 321
Output terminal of the second end as fiber resonance cavity 30, the second resonator mirror 322 is connected with the second end of Active Optical Fiber 31.Having
Body is in application, the first resonator mirror 321 and the second resonator mirror 322 are divided into 31 both ends of Active Optical Fiber, the second resonator mirror 322
It can be high reflective grid, can realize total reflection；First resonator mirror 321 can be low reflective grid, can realize that part is reflected,
Fraction of laser light transmission output.When in pump light input optical fibre resonator 30,31 radiation laser of Active Optical Fiber, Active Optical Fiber 31 are excited
The laser of radiation is under the reflex repeatedly of the first resonator mirror 321 and the second resonator mirror 322, the quilt in resonator mirror 32
Amplification, last output intensity are enough to be used in the laser of application.
Further, the Active Optical Fiber 31 includes single cladded-fiber or doubly clad optical fiber.Wherein, the fibre of single cladded-fiber
Only one layer of covering outside core, and it is more doubly clad optical fiber to apply.Double-clad optical fiber laser is by concentric fibre core, interior bag
Layer, surrounding layer and protective layer composition, inner cladding and surrounding layer have concentric circular structure, and the diameter of double clad is much larger than fibre
The diameter of core.Double-clad optical fiber laser is the representative of Novel fiber laser development, its advantage is that need not be by pumping
Energy is directly coupled in the relatively small optical fiber of mode field diameter, and low cost, large mode field (multimode), Gao Gong may be employed in it
The semiconductor laser 20 of rate is used as pumping source.
Further, the Active Optical Fiber 31 is included in rare earth doped fiber, dyestuff optical fiber and superfluorescent fiber
Any one.Active Optical Fiber 31 can be rare earth doped fiber, i.e., doped with rare earth element ion in Active Optical Fiber 31,
Specifically, Doped ions can be Nd3+、Er3+、Yb3+And Tm3+Deng matrix can be quartz glass, Zirkonium fluoride glass and monocrystalline
Deng；Or dyestuff optical fiber laser, i.e., doped with laser dye in the fibre core of Active Optical Fiber 31 or covering；Can also be super
Fluorescence optical fiber, by using the disposable laser of nonlinear effect generation wavelength of superfluorescent fiber.
Further, the resonator mirror 32 includes any one in speculum, fiber grating and fiber optic loop.Resonator
Mirror 32 provides positive feedback for the foundation of laser generation, while also can influence the matter of outgoing laser beam by adjusting the parameter of resonator
Amount.Resonator mirror 32 can make the photon of intracavitary have consistent frequency, phase and traffic direction, so that laser has good side
Tropism and coherence；Moreover, it can shorten the length of operation material well, moreover it is possible to be adjusted by changing cavity length
The pattern of produced laser.During concrete application, resonator mirror 32 can be speculum, fiber grating or fiber optic loop.
Further, first resonator mirror 321 includes low reflective grid, and second resonator mirror 322 includes high anti-
Grating.When resonator mirror is fiber grating, the first resonator mirror 321 is low reflective grid, and reflectivity is relatively low, can be partly anti-
Laser is penetrated, it can also be by transmiting outgoing laser beam；Second resonator mirror 322 is high reflective grid, and reflectivity is high, can realize
The total reflection of laser, so that laser constantly reflection amplification, and exporting repeatedly in resonator mirror that Active Optical Fiber 31 radiates
To the laser beam for meeting intensity requirement.
Further, the controller 10 includes any one in FPGA, DSP and microcontroller.Controller 10 is used to control
The work of semiconductor laser 20 processed, specifically, controller 10 controls semiconductor laser 20 to stop work after sending first pulse
Make, it is achieved thereby that carrying out pumping merely with the first pulse of 20 relaxation oscillation of semiconductor laser, realize optical fiber laser
Lasting short pulse output.
Further, bundling device, the output terminal of the input terminal of the bundling device and the semiconductor laser 20 are further included
Connection, the output terminal of the bundling device are connected with the first end of the Active Optical Fiber 31.Bundling device is pump combiner, arranged on having
Between source optical fiber 31 and semiconductor laser 20, the pumping that semiconductor laser 20 exports is converged and imports a fiber resonance cavity
In, realize laser pumping.
Further, a length of 12 meters of the chamber of the fiber resonance cavity.In one embodiment, fiber resonance cavity chamber length is set to
Spacing distance between 12m, i.e. the first resonator mirror 321 and the second resonator mirror 321 is set to 12m, can provide a suitable arteries and veins
Rush the output of width.
Further, the reflectivity of the low reflective grid is 8%.In one embodiment, low reflective grid, i.e. the first resonance
The reflectivity of hysteroscope 321 is 8%, realizes that part is reflected, can provide the output of an adequate impulse intensity.
Fig. 4 is the structure diagram of one embodiment of optical fiber laser of the application.As shown in figure 4, in the present embodiment, control
Device is FPGA, and pumping source is semiconductor laser LD, and fiber resonance cavity is by Active Optical Fiber YDF, low reflective grid OC and high reflective grid
HR is formed, and the bundling device Combiner that is pumped through of semiconductor laser LD outputs enters in Active Optical Fiber, optical fiber laser
Output terminal Output is located at low reflective grid OC sides.Optical fiber laser work when, pump energy is provided by LD, by Combiner into
Enter Active Optical Fiber, LD controlled by FPGA, in the relaxation oscillation stage of laser output, when first pulse occurs, turns off LD in time,
Train of pulse below will not be then generated, can realize controllable pulse output.
Further, understand that the pulse parameter that relaxation oscillation generates can be subject to chamber length, low reflective grid anti-by theory analysis
The influence of rate, pumping light power and pumping optical rise time is penetrated, these parameters are optimized by experiment, is found
Chamber length influences the pulse width of output, and low reflective grid reflectivity influences efficiency of laser, and pump power and pumping light pulse rise
Time effects export the intensity of pulse.Finally, the present apparatus has selected 12m chambers long, and 8% low reflective grid reflectivity is pumped using 11W,
In short time overshoot to 20W export.Fig. 5 is the output waveform figure of the present embodiment, as shown in figure 5, obtained output result：Output
Pulse 330ns, output power 0.7w when 20kHz works, output power 2.0w when 60kHz works, light-light efficiency about 42%.Its
In, be followed successively by 20 from left to right, 30,40,50kHz work when the pulse that exports, optical fiber laser can be operated in 1kHz to several
Optional frequency between hundred kHz.
Above-mentioned optical fiber laser, when working in the repetition frequency range of 10kHz-100kHz, output power about 0.5-
The acousto-optic Q modulation laser of 3.0W, output characteristics and optical fiber approaches, but compared with Q-switched laser, has following advantage：
1. exporting pulse relatively to stablize, the pulse jitter of Q-switched laser output is stronger, and laser output is stablized；
2. cost advantage, which is approximately the 1/2 of corresponding Q-switched laser；
3. the repetition frequency range increase of work, can be in 1kHz to the optional frequency work between hundreds of kHz.With locked mode
The optical fiber laser of technology is compared, the laser of the application need not complicated pulser, structure is relatively easy.With MOPA
The electrical modulation semiconductor laser the output phase ratio that structure uses, relaxation oscillation pulse laser output power are high by hundreds of to 1,000
Times, level-one pre-amplification can be saved, and expensive electrical modulation semiconductor laser need not be used, it can reduce and be fabricated to
This.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the application, and description is more specific and detailed, but simultaneously
Cannot the limitation to utility model patent scope therefore be interpreted as.It should be pointed out that the ordinary skill people for this field
For member, on the premise of the application design is not departed from, various modifications and improvements can be made, these belong to the application's
Protection domain.Therefore, the protection domain of the application patent should be determined by the appended claims.
Claims (10)
1. a kind of optical fiber laser, which is characterized in that swash including semiconductor laser, fiber resonance cavity and the control semiconductor
Light device sends the controller being stopped after first pulse；
The controller is connected with the input terminal of the semiconductor laser, the output terminal of the semiconductor laser and the light
The input terminal connection of fine resonator, the output terminal output laser of the fiber resonance cavity.
2. optical fiber laser according to claim 1, which is characterized in that it is harmonious that the fiber resonance cavity includes Active Optical Fiber
It shakes hysteroscope, the resonator mirror includes the first resonator mirror and the second resonator mirror；
The first end of the Active Optical Fiber is connected with the output terminal of the semiconductor laser, and the first of first resonator mirror
End is connected with the first end of the Active Optical Fiber, and the second end of first resonator mirror exports the laser, and described second is humorous
Hysteroscope of shaking is connected with the second end of the Active Optical Fiber.
3. optical fiber laser according to claim 2, which is characterized in that the Active Optical Fiber includes single cladded-fiber or double
Cladded-fiber.
4. optical fiber laser according to claim 2, which is characterized in that the Active Optical Fiber includes rare earth doped light
Any one in fine, dyestuff optical fiber and superfluorescent fiber.
5. optical fiber laser according to claim 2, which is characterized in that the resonator mirror includes speculum, optical fiber light
Any one in grid and fiber optic loop.
6. optical fiber laser according to claim 2, which is characterized in that first resonator mirror includes low reflective grid,
Second resonator mirror includes high reflective grid.
7. optical fiber laser according to claim 1, which is characterized in that the controller includes FPGA, DSP and microcontroller
In any one.
8. according to the optical fiber laser described in claim 2 to 6 any one, which is characterized in that further include bundling device, the conjunction
The input terminal of beam device is connected with the output terminal of the semiconductor laser, the output terminal of the bundling device and the Active Optical Fiber
First end connects.
9. optical fiber laser according to claim 6, which is characterized in that a length of 12 meters of the chamber of the fiber resonance cavity.
10. optical fiber laser according to claim 9, which is characterized in that the reflectivity of the low reflective grid is 8%.
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| CN201721517864.6U CN207442177U (en) | 2017-11-14 | 2017-11-14 | Optical fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721517864.6U CN207442177U (en) | 2017-11-14 | 2017-11-14 | Optical fiber laser |
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