CN209358058U - A kind of saturable absorber and laser with active-passive lock mould - Google Patents
A kind of saturable absorber and laser with active-passive lock mould Download PDFInfo
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- CN209358058U CN209358058U CN201822228071.3U CN201822228071U CN209358058U CN 209358058 U CN209358058 U CN 209358058U CN 201822228071 U CN201822228071 U CN 201822228071U CN 209358058 U CN209358058 U CN 209358058U
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- saturable absorber
- tellurium alkene
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Abstract
The utility model provides a kind of saturable absorber, the tellurium alkene material layer including substrate and setting on the substrate.Tellurium alkene material layer has excellent efficiency of light absorption and saturated absorption characteristic, so that saturable absorber generates relatively strong absorb to the laser in energy band, absorptivity than conventional saturable absorber is order of magnitude greater, and tellurium alkene material layer performance is stable, flexible, improve saturable absorber stability and flexibility, increase the service life of saturable absorber, laser can be made to generate the ultrashort pulse of high stable, high-energy when applied to laser with active-passive lock mould, significantly improve the non-linear optical property and stability of laser.
Description
Technical field
The utility model relates to field of laser device technology, in particular to a kind of saturable absorber and passive mode-locking laser
Device.
Background technique
In field of lasers, laser with active-passive lock mould can provide high beam quality and energy, have high stability, also
Have many advantages, such as splendid flexibility, designability, system compatibility, therefore, is applied in the fields such as national defence, scientific research, industry
Extensively, there is high application value.
The method for realizing laser passive mode-locking mainly includes the current existing saturable absorption using saturable absorber
The material of body includes graphene, molybdenum disulfide, the two-dimensional material that black phosphorus is representative and semiconductor saturable absorbing mirror etc..Its
In, graphene has many advantages, such as high carrier mobility, wide-band response, bigger serface, but absorption efficiency is relatively low；Two sulphur
Change the adjustable band-gap characteristic of molybdenum and preferably absorb the deficiency for compensating for graphene in specific wavelength, but due to its biggish band
Gap and complicated preparation process, limit its yield；Black phosphorus is suitble to work near infrared band, but sensitive to ambient enviroment,
Stability is poor, can not long-term stable work, under the particular surroundings such as humidity be even more can not work normally；Semiconductor saturable
Absorbing mirror operating wavelength range is smaller, and production is complicated and expensive.In order to increase the interaction strength of these two-dimensional materials and light,
It is used the two-dimensional material saturable absorber based on D- type optical fiber and tapered fiber, to generate stable ultrashort pulse
Laser, but these structures are unfavorable for the generation of big energy, High power ultra-short pulse all along with biggish insertion loss.
Therefore, need that a kind of stability is good, has high non-linearity optical property and the simple saturable absorption of preparation method
Body, to meet the use demand of laser with active-passive lock mould.
Utility model content
In view of this, the present invention provides a kind of saturable absorbers, and wherein tellurium alkene material layer has excellent light
Absorption efficiency and saturated absorption characteristic, so that saturable absorber generates relatively strong absorption to the laser in energy band, it can than conventional
The absorptivity of saturated absorbing body is order of magnitude greater, and tellurium alkene material layer performance is stable, flexible, improves saturable absorption
Body stability and flexibility increase the service life of saturable absorber.
In a first aspect, the utility model provides a kind of saturable absorber, including substrate and setting in the substrate
On tellurium alkene material layer.
Optionally, the tellurium alkene material layer includes thin polymer film matrix and is entrained in the thin polymer film matrix
Tellurium alkene.
Optionally, the tellurium alkene includes tellurium alkene nanometer sheet, and the lateral dimension of the tellurium alkene nanometer sheet is 6 μm -10 μm, thickness
For 30nm-80nm.Further, the lateral dimension of the tellurium alkene nanometer sheet is 6 μm -8 μm, with a thickness of 30nm-50nm.
In the present invention, edge effect can be adjusted by controlling the size of tellurium alkene nanometer sheet and quantum confinement is imitated
It answers, and then obtains the tellurium alkene material of different-energy band gap, so that resonant check preferably occurs with light, so that tellurium alkene nanometer sheet pair
Laser in energy band generates strong absorption, further enhances absorptivity.
Optionally, the mass content of tellurium alkene described in the tellurium alkene material layer is 0.001%-2%.Further, described
The mass content of tellurium alkene described in tellurium alkene material layer is 0.005%-1%.
Optionally, the thin polymer film matrix has tridimensional network, and the tellurium alkene is dispersed in the three-dimensional
In reticular structure.
In the present invention, thin polymer film matrix has tridimensional network, and tellurium alkene is dispersed in three-dimensional netted
In structure, tellurium alkene material layer is enabled to carry out uniform pickup to the laser generated in energy band, meanwhile, the presence of polymer makes
The flexible reinforced of tellurium alkene material layer does not allow easily broken, easily transfer and repeatedly utilization during subsequent applications, and protects tellurium alkene
From the influence of external mechanical stress and environmental factor, to improve the utilization rate of tellurium alkene material layer.
Optionally, the thin polymer film matrix be polyvinylpyrrolidone--based body, polymethylmethacrylate matrix or
Polystyrene matrix.
Optionally, the tellurium alkene material layer with a thickness of 1 μm -5 μm.Further, the tellurium alkene material layer with a thickness of 2
μm-3μm。
Optionally, the substrate is fiber end face, reflecting mirror or transparent glass.
The utility model first aspect provides a kind of saturable absorber, with excellent efficiency of light absorption, can satisfy
With absorption characteristic and flexibility, stability is good, in use can efficient absorption laser and transfer, in replacement process not
Broken, long service life easily occurs.
Second aspect, the utility model provide a kind of laser with active-passive lock mould, including saturable described in first aspect
Absorber.
Optionally, the energy bandgaps of the tellurium alkene material layer in the saturable absorber and the passive mode-locking laser
The operation wavelength of device is same or similar.
Wherein, the energy bandgaps of tellurium alkene material layer refer to the energy bandgaps of tellurium alkene in tellurium alkene material layer.
Further, the close energy bandgaps for the tellurium alkene and the operation wavelength of the laser with active-passive lock mould
Difference is within ± 200nm.
Optionally, the laser with active-passive lock mould is full-optical-fiber laser or all solid state laser.
Further, the full-optical-fiber laser include the pumping source set gradually along optical propagation direction, wavelength division multiplexer,
Gain fibre, the unrelated isolator of polarization, Polarization Controller, the saturable absorber and fiber coupler.
Further, all solid state laser includes the pumping source set gradually along optical propagation direction, input mirror, focuses
Lens, gain media, the saturable absorber and outgoing mirror.
The laser with active-passive lock mould that the utility model second aspect provides can generate the ultrashort arteries and veins of high stable, high-energy
Punching, significantly improves non-linear optical property and stability.
The utility model has the beneficial effects that
The utility model provides a kind of saturable absorber, wherein tellurium alkene material layer have excellent efficiency of light absorption and
Saturated absorption characteristic makes saturable absorber generate relatively strong absorption to the laser in energy band, than conventional saturable absorber
Absorptivity is order of magnitude greater, and tellurium alkene material layer performance is stable, flexible, further improves the steady of saturable absorber
It is qualitative and flexible, the service life of saturable absorber is increased, laser can be made to produce when applied to laser with active-passive lock mould
The ultrashort pulse of raw high stable, high-energy, significantly improves the non-linear optical property and stability of laser.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described.Specific embodiment described herein is only used to solve
The utility model is released, is not used to limit the utility model.
Fig. 1 is the structural schematic diagram for the saturable absorber that one embodiment of the utility model provides；
Fig. 2 is the structural schematic diagram for the full-optical-fiber laser that one embodiment of the utility model provides；
The decomposition texture of saturable absorber shows in the full-optical-fiber laser that Fig. 3 provides for one embodiment of the utility model
It is intended to.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model provides a kind of saturable absorber, the tellurium alkene material including substrate and setting on the substrate
The bed of material.
Referring to Fig. 1, the structural schematic diagram of the saturable absorber provided for one embodiment of the utility model, saturable
Absorber includes the tellurium alkene material layer 20 of substrate 10 and setting on the substrate 10.
In the utility model embodiment, the material of tellurium alkene material layer includes thin polymer film matrix and is entrained in described
Tellurium alkene in thin polymer film matrix.
In the utility model embodiment, tellurium alkene includes tellurium alkene nanometer sheet, and the lateral dimension of tellurium alkene nanometer sheet is 6 μm of -10 μ
M, with a thickness of 30nm-80nm.Further, the lateral dimension of tellurium alkene nanometer sheet is 6 μm -8 μm, with a thickness of 30nm-50nm.
In the present invention, edge effect can be adjusted by controlling the size of tellurium alkene nanometer sheet and quantum confinement is imitated
It answers, and then obtains the tellurium alkene material of different-energy band gap, so that resonant check preferably occurs with light, so that tellurium alkene nanometer sheet pair
Laser in energy band generates strong absorption, further enhances absorptivity.
In the utility model embodiment, the mass content of tellurium alkene described in the tellurium alkene material layer is 0.001%-2%.
Further, the mass content of tellurium alkene described in the tellurium alkene material layer is 0.005%-1%.
In the utility model embodiment, the thin polymer film matrix has tridimensional network, and the tellurium alkene is uniform
It is dispersed in the tridimensional network.
In the present invention, thin polymer film matrix has tridimensional network, and tellurium alkene is dispersed in three-dimensional netted
In structure, tellurium alkene material layer is enabled to carry out uniform pickup to the laser generated in energy band, meanwhile, the presence of polymer makes
The flexible reinforced of tellurium alkene material layer does not allow easily broken, easily transfer and repeatedly utilization during subsequent applications, and protects tellurium alkene
From the influence of external mechanical stress and environmental factor, to improve the utilization rate of tellurium alkene material layer.
In the utility model embodiment, thin polymer film matrix is polyvinylpyrrolidone--based body, polymethylacrylic acid
Acrylate matrix or polystyrene matrix.
In the utility model embodiment, tellurium alkene material layer with a thickness of 1 μm -5 μm.Further, tellurium alkene material layer
With a thickness of 2 μm -3 μm.
In the utility model embodiment, substrate is fiber end face, reflecting mirror or transparent glass.
In the utility model embodiment, substrate can be selected according to the applicable cases of saturable absorber, application
When various lasers, different substrates can be used.
The utility model provides a kind of saturable absorber, special with excellent efficiency of light absorption, saturable absorption
Property and flexibility, stability it is good, in use being capable of efficient absorption laser and in transfer, be not susceptible to brokenly in replacement process
It is broken, long service life.
The preparation method for the saturable absorber that the utility model embodiment provides, comprising:
Polymer and tellurium alkene dispersion liquid are provided, polymer and tellurium alkene dispersion liquid are uniformly mixed and obtain mixed liquor；
Mixed liquor is dropped on substrate, after 20 DEG C of -50 DEG C of vacuum drying form a film on substrate, is removed to obtain tellurium alkene
Material layer；
Tellurium alkene material layer is transferred to substrate surface, saturable absorber can be obtained.
In the utility model embodiment, tellurium alkene dispersion liquid and mixed with polymers obtain mixed liquor through ultrasonic disperse.
In the utility model embodiment, tellurium alkene material layer is with polymer by tellurium alkene dispersion liquid by mixing, uniformly stirring
It mixes, solution drop coating and dry formed.
In the utility model embodiment, the solute of tellurium alkene dispersion liquid be can be, but not limited to as tellurium alkene nanometer sheet.Optionally,
The lateral dimension of tellurium alkene nanometer sheet is 6 μm -10 μm, with a thickness of 30nm-80nm.Further, the lateral dimension of tellurium alkene nanometer sheet
It is 6 μm -8 μm, with a thickness of 30nm-50nm.
In the utility model embodiment, the solvent of tellurium alkene dispersion liquid is water, isopropanol, ethyl alcohol or N- crassitude
Ketone.
In the utility model embodiment, the concentration of tellurium alkene dispersion liquid is 0.2mg/mL-0.6mg/mL.Further, tellurium
The concentration of alkene dispersion liquid is 0.25mg/mL-0.5mg/mL.
In the utility model embodiment, the solid-to-liquid ratio of polymer and tellurium alkene dispersion liquid is 1mg:(2.5mL-40mL).Into
One step, the solid-to-liquid ratio of polymer and tellurium alkene dispersion liquid is 1mg:(5mL-30mL).
In the utility model embodiment, polymer is polyvinylpyrrolidone, polymethyl methacrylate or polyphenyl second
Alkene.
In the utility model embodiment, after mixed liquor drops on substrate, it can be removed after mixed liquor film forming.
Optionally, the vacuum drying time is 0.5h-3h.
In the utility model embodiment, tellurium alkene material layer with a thickness of 1 μm -5 μm.Further, tellurium alkene material layer
With a thickness of 2 μm -3 μm.
In the utility model embodiment, substrate be can be, but not limited to as polytetrafluoroethylene (PTFE).
In the utility model embodiment, removing includes chemical stripping, physics removing or mechanical stripping.
It is equal with substrate end face size by being cut into tellurium alkene material layer in the utility model embodiment, so
After be transferred in substrate.
In the utility model embodiment, tellurium alkene material layer is cut, by the tellurium alkene material stratification after multiple cuttings
In on substrate end face, and substrate end face is completely covered.
The utility model additionally provides a kind of laser with active-passive lock mould, including above-mentioned saturable absorber.
In the utility model embodiment, the energy bandgaps of the tellurium alkene in saturable absorber and laser with active-passive lock mould
Operation wavelength is same or similar.Further, the operation wavelength of the close energy bandgaps for referring to tellurium alkene and laser with active-passive lock mould
Difference within ± 200nm.
In the utility model embodiment, laser with active-passive lock mould is full-optical-fiber laser or all solid state laser.
In one embodiment of the utility model, laser with active-passive lock mould is full-optical-fiber laser, and full-optical-fiber laser includes
Pumping source, wavelength division multiplexer, gain fibre, the unrelated isolator of polarization, Polarization Controller, saturable provided by the utility model are inhaled
Acceptor and fiber coupler.
In one preferred embodiment of the utility model, fiber coupler is the fiber coupler that coupling ratio is 20:80.
Fig. 2 is the structural schematic diagram for the full-optical-fiber laser that one embodiment of the utility model provides.It can from Fig. 2
Out, the full-optical-fiber laser that one embodiment of the utility model provides includes pumping source 201, wavelength division multiplexer 202, gain fibre
203, unrelated isolator 204, Polarization Controller 205, saturable absorber 206, fiber coupler 207 are polarized.Wherein, wavelength-division is multiple
With device 202, gain fibre 203, the unrelated isolator 204 of polarization, Polarization Controller 205, saturable absorber 206, fiber coupling
Device 207 successively connects into optical fibre ring resonator cavity structure with single mode optical fiber.Wherein, pumping source 201 and wavelength division multiplexer 202
End (reflection end) connection is pumped, pump light is input in optical fibre resonator chamber, the common end of wavelength division multiplexer 202 and gain light
One end of fibre 203 is connected；The output end of the other end of gain fibre 203 isolator 204 unrelated with polarization connects；Polarize it is unrelated every
One Duan Xianglian of input terminal and Polarization Controller 205 from device 204；The other end and saturable absorber of Polarization Controller 205
206 Duan Xianglian；The other end of saturable absorber 206 and coupling ratio are the defeated of the 80% of the fiber coupler 207 of 20:80
Outlet is connected, 5% output end output signal light of fiber coupler 207；The input terminal and wavelength division multiplexer of fiber coupler 207
202 signal end is connected.In full-optical-fiber laser, saturable absorber plays saturable absorption effect, makes full optical fiber laser
Device generates ultrashort pulse output.
In the utility model embodiment, the central wavelength of the pump light of pumping source output is 980nm.
In the utility model embodiment, gain fibre 203 is Yb dosed optical fiber, mixes bismuth optical fiber, Er-doped fiber, thulium doped fiber
Or ZBLAN optical fiber etc., specifically, when selecting different gain fibres, wavelength division multiplexer, fiber coupler, polarization are unrelated
Isolator, Polarization Controller, saturable absorber operation wavelength be corresponding gain fibre operation wavelength.Specifically, gain
Optical fiber 203 is Er-doped fiber, and gain media of the Er-doped fiber as laser, length is 0.5 meter, group velocity dispersion 48ps2/
km。
The decomposition knot of saturable absorber 206 in the full-optical-fiber laser that Fig. 3 provides for one embodiment of the utility model
Structure schematic diagram；From figure 3, it can be seen that saturable absorber 206 was made of tellurium alkene material layer and optical fiber connector, specifically
Structure is as shown in figure 3, be by 301, fiber adapter 302 of the first fiber connector, tellurium alkene material layer 303 and the second light
Fine connector 304 assembles, wherein tellurium alkene material layer is arranged in fiber adapter 302 and is located at the first fiber connector
301 and second between fiber connector 304, forms fiber connector-tellurium alkene material layer-fiber connector sandwich structure,
Ultimately form saturable absorber structure.
In another embodiment of the utility model, laser with active-passive lock mould is all solid state laser, all solid state laser packet
Include pumping source, input mirror, condenser lens, gain media, saturable absorber provided by the utility model and outgoing mirror.
In the utility model embodiment, pumping source, wavelength division multiplexer, Polarization Controller, fiber coupler, polarization are unrelated
Isolator is industry conventional selection, and the utility model does not do particular determination.
High quality, the tellurium alkene material layer of high optical absorptivity are prepared into saturable absorber by the utility model, make laser
Device realizes passive mode-locking operating, generates the ultrashort pulse of high-energy, high stable.
Embodiment 1
A kind of saturable absorption preparation
The nanometer sheet solution of alkene containing tellurium and polyvinylpyrrolidone are provided, 1mg polyvinylpyrrolidonepowder powder and 10mL are contained
The solution of tellurium alkene nanometer sheet mixes, and fully after uniform stirring 1h, obtains mixed liquor；Mixed liquor is dripped into polytetrafluoroethylsubstrate substrate
On, under vacuum condition after 40 DEG C of standings dry 2h, tellurium alkene material layer is formed in polytetrafluoroethylsubstrate substrate, by tellurium alkene material layer
It is removed with polytetrafluoroethylsubstrate substrate, obtains tellurium alkene material layer.
Tellurium alkene material layer is cut, it is close with fiber end face size to cut out gained area, and be less than light as far as possible
Fine face area.Tellurium alkene material layer is placed on fiber end face, is connected two fiber connectors by fiber adapter
It connects, completes the preparation of saturable absorber.
A kind of saturable absorber, saturable absorber include a fiber connector, a fiber adapter, tellurium alkene material
The bed of material and another fiber connector, wherein tellurium alkene material layer is fitted on the fiber end face of fiber connector.
A kind of full-optical-fiber laser, including 980nm pumping source, wavelength division multiplexer, gain fibre, Polarization Controller, polarization
Unrelated isolator, fiber coupler and above-mentioned saturable absorber.
The operation wavelength of full-optical-fiber laser is 1055nm in the present embodiment.
Effect example
Comparative example 1: using conventional black phosphorus two-dimensional material as saturable absorber, full-optical-fiber laser is made.
The radio-frequency spectrum that full-optical-fiber laser made from embodiment 1 and comparative example 1 is passed through to measurement output pulse respectively carries out
Compare, it is found that the letter of the full-optical-fiber laser fundamental frequency of the fundamental frequency signal-to-noise ratio comparative example 1 of the full-optical-fiber laser of embodiment 1
It makes an uproar than big 4.6dB, illustrates that the full-optical-fiber laser of embodiment 1 is more stable.
To sum up, saturable absorber preparation provided by the utility model is simple, stability is good, it is optical to have high non-linearity
Can be with flexible speciality, laser with active-passive lock mould stability obtained, the laser environment stability constituted is preferable, Ke Yigeng
Meet the practical application in market well.
The above is preferred embodiments of the present invention, and but it cannot be understood as special to the utility model
The limitation of sharp range.It should be pointed out that for those skilled in the art, not departing from the utility model principle
Under the premise of, several improvements and modifications can also be made, these improvements and modifications are also considered as the protection scope of the utility model.
Claims (10)
1. a kind of saturable absorber, which is characterized in that including the tellurium alkene material layer of substrate and setting on the substrate.
2. saturable absorber as described in claim 1, which is characterized in that the tellurium alkene material layer includes thin polymer film base
Body and the tellurium alkene being entrained in the thin polymer film matrix.
3. saturable absorber as claimed in claim 2, which is characterized in that the tellurium alkene includes tellurium alkene nanometer sheet, the tellurium
The lateral dimension of alkene nanometer sheet is 6 μm -10 μm, with a thickness of 30nm-80nm.
4. saturable absorber as claimed in claim 2, which is characterized in that the thin polymer film matrix has three-dimensional netted
Structure, the tellurium alkene are dispersed in the tridimensional network.
5. saturable absorber as claimed in claim 2, which is characterized in that the thin polymer film matrix is polyvinyl pyrrole
Alkanone matrix, polymethylmethacrylate matrix or polystyrene matrix.
6. saturable absorber as described in claim 1, which is characterized in that the tellurium alkene material layer with a thickness of 1 μm -5 μm.
7. saturable absorber as described in claim 1, which is characterized in that the substrate is fiber end face, reflecting mirror or saturating
Bright glass.
8. a kind of laser with active-passive lock mould, which is characterized in that including such as described in any item saturable absorptions of claim 1-7
Body.
9. laser with active-passive lock mould as claimed in claim 8, which is characterized in that the laser with active-passive lock mould swashs for all -fiber
Light device or all solid state laser.
10. laser with active-passive lock mould as claimed in claim 9, which is characterized in that the full-optical-fiber laser includes passing along light
It broadcasts pumping source, wavelength division multiplexer, gain fibre that direction sets gradually, the unrelated isolator of polarization, Polarization Controller, described satisfy
With absorber and fiber coupler, all solid state laser include the pumping source set gradually along optical propagation direction, input mirror,
Condenser lens, gain media, the saturable absorber and outgoing mirror.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822228071.3U CN209358058U (en) | 2018-12-27 | 2018-12-27 | A kind of saturable absorber and laser with active-passive lock mould |
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| CN201822228071.3U CN209358058U (en) | 2018-12-27 | 2018-12-27 | A kind of saturable absorber and laser with active-passive lock mould |
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