CN108767648B - Saturable absorber device and preparation method thereof, mode locked fiber laser - Google Patents
Saturable absorber device and preparation method thereof, mode locked fiber laser Download PDFInfo
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- CN108767648B CN108767648B CN201810841783.4A CN201810841783A CN108767648B CN 108767648 B CN108767648 B CN 108767648B CN 201810841783 A CN201810841783 A CN 201810841783A CN 108767648 B CN108767648 B CN 108767648B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
- H01S3/1118—Semiconductor saturable absorbers, e.g. semiconductor saturable absorber mirrors [SESAMs]; Solid-state saturable absorbers, e.g. carbon nanotube [CNT] based
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
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- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
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Abstract
The embodiment of the invention discloses a kind of saturable absorber devices and preparation method thereof, mode locked fiber laser, wherein the saturable absorber device includes: the first optical fiber；Perovskite quantum dot is attached on the end face of the first end of the first optical fiber；The first end of first Optical fiber plug, the first optical fiber is inserted into the first Optical fiber plug.Technical solution provided in an embodiment of the present invention, perovskite quantum dot is attached on the end face of the first end of the first optical fiber, the first end of the first optical fiber is inserted into the first Optical fiber plug simultaneously and forms saturable absorber device, the saturable absorber device of formation has stronger third-order nonlinear optical effect and faster response time, saturable absorber device architecture is simple simultaneously, it can simplify the manufacture craft of saturable absorber device, reduce the preparation cost of saturable absorber device.
Description
Technical field
The present embodiments relate to field of laser device technology more particularly to a kind of saturable absorber device and its preparation sides
Method, mode locked fiber laser.
Background technique
Mode locked fiber laser, which refers to, carries out mode locking by the way that mould-locking structure is added in the resonant cavity of optical fiber laser, in turn
Generate ultrashort pulse.
Currently, mould-locking structure is broadly divided into active mode locking and passive mode-locking, passive mode-locking mainly utilizes non-thread in optical fiber
Property effect, based on saturable absorber complete mode locking mechanism.Saturable absorber commonly used in the prior art has semiconductor that can satisfy
With absorbing mirror SESAM, graphene and carbon nanotube CNT.
Semiconductor saturable absorbing mirror SESAM complex manufacturing technology, it is at high cost；It is prepared by graphene and carbon nanotube CNT
Journey is cumbersome, and third-order nonlinear optical effect is not strong, and the response time is slower, is unfavorable for being widely used in optical fiber laser.
Summary of the invention
The present invention provides a kind of saturable absorber device and preparation method thereof, mode locked fiber laser, can be satisfied with simplification
With the manufacture craft of absorber devices, its preparation cost is reduced.
In a first aspect, the embodiment of the invention provides a kind of saturable absorber device, the saturable absorber device packet
It includes:
First optical fiber；
Perovskite quantum dot is attached on the end face of the first end of the first optical fiber；
The first end of first Optical fiber plug, the first optical fiber is inserted into the first Optical fiber plug.
Optionally, saturable absorber device further include:
The first end of second optical fiber and the second Optical fiber plug, the second optical fiber is inserted into the second Optical fiber plug；
First end optical fiber flange plate, including the first connectivity port and second connection end mouth, the first Optical fiber plug are connect with first
Port connection, the second Optical fiber plug are connect with second connection end mouth.
Optionally, perovskite quantum dot is attached on the end face of the first end of the second optical fiber.
Optionally, the end face of the first end of the first optical fiber is vertical with the axis of the first optical fiber.
Second aspect, the embodiment of the invention also provides a kind of saturable absorber device, the saturable absorber devices
Include:
First glass substrate, the second glass substrate and the calcium being held between the first glass substrate and the second glass substrate
Titanium ore quantum dot；
The first end of third optical fiber and third Optical fiber plug, third optical fiber is inserted into third Optical fiber plug；
The first end of 4th optical fiber and the 4th Optical fiber plug, the 4th optical fiber is inserted into the 4th Optical fiber plug；
Wherein, third Optical fiber plug is located at side of first glass substrate far from the second glass substrate, the 4th Optical fiber plug
Side positioned at the second glass substrate far from the first glass substrate, third Optical fiber plug and the 4th Optical fiber plug clamp the first glass
Substrate, the second glass substrate and the perovskite quantum dot being held between the first glass substrate and the second glass substrate.
Optionally, which further includes the second end optical fiber flange plate；
First glass substrate, the second glass substrate and the calcium being held between the first glass substrate and the second glass substrate
Titanium ore quantum dot is located in the second end optical fiber flange plate；
Second end optical fiber flange plate includes third connectivity port and the 4th connectivity port, third Optical fiber plug and third connecting pin
Mouth connection, the 4th Optical fiber plug are connect with the 4th connectivity port.
The third aspect, the embodiment of the invention also provides a kind of preparation method of saturable absorber device, the preparation sides
Method includes:
Prepare perovskite quantum dot；
First optical fiber is provided and is attached to perovskite quantum dot on the end face of first end of the first optical fiber；
First Optical fiber plug is provided and the first end of the first optical fiber is inserted into the first Optical fiber plug.
Optionally, the preparation method further include:
Second optical fiber and the second Optical fiber plug are provided, and the first end of the second optical fiber is inserted into the second Optical fiber plug；
There is provided the first end optical fiber flange plate, the first end optical fiber flange plate includes the first connectivity port and second connection end mouth, by the
One Optical fiber plug is connect with the first connectivity port, and the second Optical fiber plug is connect with second connection end mouth.
Fourth aspect, the embodiment of the invention also provides a kind of preparation method of saturable absorber device, the preparation sides
Method includes:
Prepare perovskite quantum dot；
First glass substrate and the second glass substrate be provided, and perovskite quantum dot is instiled in the first glass substrate and the
Between two glass substrates；
Third optical fiber and third Optical fiber plug are provided, the first end of third optical fiber is inserted into third Optical fiber plug；
4th optical fiber and the 4th Optical fiber plug are provided, the first end of the 4th optical fiber is inserted into the 4th Optical fiber plug；
Third Optical fiber plug and the 4th Optical fiber plug are clamped into the first glass substrate, the second glass substrate and are held on the
Perovskite quantum dot between one glass substrate and the second glass substrate.
Optionally, the preparation method further include:
The second end optical fiber flange plate is provided, the second end optical fiber flange plate includes third connectivity port and the 4th connectivity port；
Third Optical fiber plug and the 4th Optical fiber plug are clamped into the first glass substrate, the second glass substrate and are held on the
Perovskite quantum dot between one glass substrate and the second glass substrate, comprising:
By the first glass substrate, the second glass substrate and it is held between the first glass substrate and the second glass substrate
Perovskite quantum dot is set in the second end optical fiber flange plate；
Third Optical fiber plug is connect with third connectivity port, the 4th Optical fiber plug is connect with the 4th connectivity port.
Optionally, preparing perovskite quantum dot includes:
Lead bromide and octadecylene are placed in heating device according to the first preset ratio, and by heating devices heat to first
Vacuumize process is carried out after preset temperature, removes oxygen and moisture in heating device；
Oleic acid and oleyl amine are added into heating device according to the second preset ratio, while injecting indifferent gas into heating device
Body guarantees that the reaction in heating device carries out in atmosphere of inert gases；
The oleic acid caesium of the first preset vol will be added after heating devices heat to the second preset temperature, it is default anti-by first
Heating device is subjected to cooling operation after between seasonable；
Mixture in heating device is subjected to centrifugal treating, obtains the solids in heating device；Solids is dissolved in
Toluene obtains perovskite quantum dot.
5th aspect, the embodiment of the invention also provides a kind of lock film optical fiber laser, which includes
First pumping source and the first resonant cavity connecting with the first pumping source include saturable absorber device in the first resonant cavity,
Wherein, saturable absorber device includes the first optical fiber；Perovskite quantum dot is attached to the end of the first end of first optical fiber
On face；The first end of first Optical fiber plug, first optical fiber is inserted into first Optical fiber plug.
Optionally, the first resonant cavity is first annular resonant cavity, and first annular resonant cavity further includes wavelength division multiplexer, gain
Optical fiber, fiber coupler and optical fiber circulator；
Wherein, the first input end of the first pumping source and wavelength division multiplexer connects, and the output end of wavelength division multiplexer passes through increasing
Beneficial optical fiber is connected with the input end of the optical fiber coupler, and the first output end of fiber coupler and the first end of optical fiber circulator connect
It connects, the second output terminal of fiber coupler exports laser, and the third end of optical fiber circulator is connect with saturable absorber device, light
The second end of fine circulator and the second input terminal of wavelength division multiplexer connect, and form first annular resonant cavity.
Optionally, the first resonant cavity is linear resonant cavity, and linear resonant cavity further includes wavelength division multiplexer, gain fibre, light
Fine coupler and fully-reflected type bragg grating；
Wherein, the first input end of the first pumping source and wavelength division multiplexer connects, and saturable absorber device and wavelength-division are multiple
It being connected with the second input terminal of device, the output end of wavelength division multiplexer is connected with the input end of the optical fiber coupler by gain fibre,
First output end of fiber coupler is connect with fully-reflected type bragg grating, the second output terminal output of fiber coupler
Laser forms linear resonant cavity.
6th aspect, the embodiment of the invention provides a kind of lock film optical fiber laser, which includes the
Two pumping sources and the second resonant cavity connecting with the second pumping source include saturable absorber device in the second resonant cavity,
In, saturable absorber device includes the first optical fiber；Perovskite quantum dot is attached to the end face of the first end of first optical fiber
On；The first end of first Optical fiber plug, first optical fiber is inserted into first Optical fiber plug；Second optical fiber and the second optical fiber are inserted
The first end of head, second optical fiber is inserted into second Optical fiber plug；First end optical fiber flange plate, including the first connectivity port and
Second connection end mouth, first Optical fiber plug are connect with first connectivity port, second Optical fiber plug and described the
The connection of two connectivity ports；Alternatively, saturable absorber device is including the first glass substrate, the second glass substrate and is held on institute
State the perovskite quantum dot between the first glass substrate and second glass substrate；Third optical fiber and third Optical fiber plug, institute
The first end for stating third optical fiber is inserted into the third Optical fiber plug；4th optical fiber and the 4th Optical fiber plug, the 4th optical fiber
First end is inserted into the 4th Optical fiber plug；Wherein, the third Optical fiber plug is located at first glass substrate far from described
The side of second glass substrate, the 4th Optical fiber plug are located at second glass substrate far from first glass substrate
Side, the third Optical fiber plug and the 4th Optical fiber plug clamp first glass substrate, the second glass substrate and
The perovskite quantum dot being held between first glass substrate and second glass substrate.
Optionally, the second resonant cavity is the second ring resonator, and the second ring resonator further includes wavelength division multiplexer, gain
Optical fiber, fibre optic isolater, connection optical fiber and fiber coupler；
Wherein, the first input end of the second pumping source and wavelength division multiplexer connects, and the output end of wavelength division multiplexer passes through increasing
The connection of the input terminal of beneficial optical fiber and fibre optic isolater, the output end of fibre optic isolater and one end of saturable absorber device connect
It connects, the other end of saturable absorber device is connected with the input end of the optical fiber coupler by connecting optical fiber, fiber coupler
The connection of second input terminal of the first output end and wavelength division multiplexer, the second output terminal of fiber coupler export laser, form the
Second ring resonant cavity.
Optionally, gain fibre includes any one in Yb dosed optical fiber, Er-doped fiber or thulium doped fiber.
Optionally, the splitting ratio of fiber coupler is R:1-R, wherein the output end export ratio of fiber coupler is R's
Laser.
Saturable absorber device provided in an embodiment of the present invention and preparation method, lock film optical fiber laser, wherein can
Saturated absorbing body device includes the first optical fiber；Perovskite quantum dot is attached on the end face of the first end of the first optical fiber；First light
The first end of fine plug, the first optical fiber is inserted into the first Optical fiber plug.Technical solution provided in an embodiment of the present invention, by perovskite amount
On the end face for the first end that son point is attached to the first optical fiber, while the first end of the first optical fiber is inserted into the first Optical fiber plug and is formed
Saturable absorber device, the saturable absorber device of formation is with stronger third-order nonlinear optical effect and faster
Response time has reached the production work of simplified saturable absorber device simultaneously because saturable absorber device architecture is simple
Skill reduces the beneficial effect of the preparation cost of saturable absorber device.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of saturable absorber device provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another saturable absorber device provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another saturable absorber device provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of another saturable absorber device provided in an embodiment of the present invention；
Fig. 5 is a kind of preparation method of saturable absorber device provided in an embodiment of the present invention；
Fig. 6 is the preparation method of another saturable absorber device provided in an embodiment of the present invention；
Fig. 7 is the preparation method of another saturable absorber device provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of mode locked fiber laser provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another mode locked fiber laser provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of another mode locked fiber laser provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of saturable absorber device provided in an embodiment of the present invention, and referring to Fig.1, this can
Saturated absorbing body device includes: the first optical fiber 110, perovskite quantum dot 120 and the first Optical fiber plug 130, wherein perovskite amount
On the end face of 120 first end for being attached to the first optical fiber 110 of son point, the first end of the first optical fiber 110 is inserted into the first Optical fiber plug
130。
Wherein, the effect of the first Optical fiber plug 130 is the first optical fiber 110 that encapsulation is attached with perovskite quantum dot 120
First end face is avoided using damage perovskite quantum dot 120 in saturable absorber device process.
Wherein, quantum dot is a kind of low dimensional semiconductor material of Nano grade, and generally spherical or spherical, diameter exists
Between 2nm-20nm.The size of quantum dot is less than Exciton Bohr Radius, has very strong quantum confined effect, so that exciton combines
Can and oscillator strength increase, thus, quantum dot as saturable absorption know from experience have third-order nonlinear optical effect by force and
Response time fast advantage.In the prior art, the quanta point material for making saturable absorber is usually carbon nanotube, stone
The semiconductor materials such as black alkene and molybdenum disulfide.Wherein, carbon nanotube is a kind of direct band gap monodimension nanometer material, band gap size
It is determined by carbon nanotube diameter and attribute, absorbing wavelength is determined by the diameter of single-walled carbon nanotube, the carbon nanotube of different-diameter
Wide non-linear absorption band can be achieved in mixing.But during preparing carbon nanotube saturable absorber, the pipe of carbon nanotube
The control of diameter size is more difficult, is difficult to be controlled so as to cause the wave-length coverage of its saturated absorption, also, the tubulose of carbon nanotube
There are scattering losses for structural form, and carbon nanotube saturable absorber is used in laser to make the laser output work of laser
Rate and efficiency are restricted.Wherein, graphene is a kind of two-dimentional carbon nanomaterial, and graphene saturable absorber has and wavelength
Unrelated saturated absorption characteristic, but it is relatively low in 1550nm wave band modulation depth.
Wherein, perovskite material refers to that a series of materials with perovskite crystal structure, general chemical formula are available
ABX3It indicates, A is usually organic ion methylamine ion, ethamine ion, carbonamidine ion or inorganic ions；B be Pb,
Sn,Ge；X is usually Cl, Br, I.Compared to semi-conducting material manufacturing saturable absorber is utilized, made using perovskite material
With third-order nonlinear optical effect, the stronger, response time is faster and saturable absorption bandwidth is broader excellent for saturable absorber
Point.
It should be noted that perovskite quantum dot refers to perovskite material of the partial size between 1-10nm, perovskite amount
The advantages of son point has both perovskite material and quantum dot, thus, saturable is made compared to using semiconductor-quantum-point material
Absorber, using perovskite quantum dot production saturable absorber have third-order nonlinear optical effect is stronger, the response time more
Fast and wider Absorber Bandwidth advantage；Saturable absorber is made compared to using perovskite material, utilizes perovskite quantum
Point production saturable absorber have the advantages that third-order nonlinear optical effect is stronger, the response time faster.
Saturable absorber device provided in an embodiment of the present invention, by using perovskite quantum dot as saturable absorber
The saturable absorption layer of part, and its attachment is fiber end face and encapsulates, and guarantees that the saturable absorber device to be formed has more
Strong third-order nonlinear optical effect and faster corresponding time, improve the performance of saturable absorber device.Simultaneously originally
The saturable absorber device architecture that inventive embodiments provide is simple, can simplify the manufacture craft of saturable absorber device,
Reduce the preparation cost of saturable absorber device.
Fig. 2 is the structural schematic diagram of another saturable absorber device provided in an embodiment of the present invention, as shown in Fig. 2,
Saturable absorber device provided in an embodiment of the present invention may include the first optical fiber 110, perovskite quantum dot 120, the first light
Fine plug 130, the second optical fiber 210, the second Optical fiber plug 230 and the first end optical fiber flange plate 310.Wherein, perovskite quantum dot 120
It is attached on the end face of the first end of the first optical fiber 110, first end the first Optical fiber plug 130 of insertion of the first optical fiber 110, second
The first end of optical fiber 210 is inserted into the second Optical fiber plug 230；First end optical fiber flange plate 310 includes that the first connectivity port and second connect
Port is connect, the first Optical fiber plug 130 is connect with the first connectivity port, and the second Optical fiber plug 230 is connect with second connection end mouth.This
Sample setting is advantageous in that the saturable absorber device with the structure can be in the incoming fiber optic laser of both ends.
Optionally, it can be attached with perovskite quantum dot on the end face of the first end of the second optical fiber 210, it can also be non-cohesive
Perovskite quantum dot, Fig. 2 are only said by taking perovskite quantum dot non-cohesive on the end face of the first end of the second optical fiber 210 as an example
It is bright.As shown in Fig. 2, unattached on the end face of the first end of the second optical fiber 210 have perovskite quantum dot, then saturable absorber
With a thickness of the thickness of perovskite quantum dot on the end face of the first end of the first optical fiber 110.It is understood that if the second optical fiber
Perovskite quantum dot is attached on the end face of 210 first end, then saturable absorber with a thickness of the first of the first optical fiber 110
On the end face at end on the end face of the first end of the thickness of perovskite quantum dot and the second optical fiber 210 perovskite quantum dot thickness it
With.
Optionally, the end face of the first end of the first optical fiber 110 can be vertical with the axis of the first optical fiber 110, i.e. the first light
The end face of the first end of fibre 110 is the fiber end face with 90 ° of corner cuts, the advantages of this arrangement are as follows, light can be from the first light
Fine 110 vertical incidence are to perovskite quantum dot 120, so that light loss is reduced, so that using the saturable absorber device
Optical fiber laser have preferable mode locking effect.
Fig. 3 is the structural schematic diagram of another saturable absorber device provided in an embodiment of the present invention.It, should referring to Fig. 3
Saturable absorber device includes: the first glass substrate 410, the second glass substrate 420, perovskite quantum dot 430, third optical fiber
Plug 440, the 4th Optical fiber plug 450, third optical fiber 460 and the 4th optical fiber 470.
Wherein, perovskite quantum dot 430 is held between the first glass substrate 410 and the second glass substrate 420, third light
The first end of fibre 460 is inserted into third Optical fiber plug 440, and the first end of the 4th optical fiber 470 is inserted into the 4th Optical fiber plug 450, third
Optical fiber plug 440 is located at side of first glass substrate 410 far from the second glass substrate 420, and the 4th Optical fiber plug 470 is located at the
Side of two glass substrates 420 far from the first glass substrate 410, third Optical fiber plug 440 and the 4th Optical fiber plug 450 clamp the
It one glass substrate 410, the second glass substrate 420 and is held between the first glass substrate 410 and the second glass substrate 420
Perovskite quantum dot 430.
Saturable absorber device provided in an embodiment of the present invention, by using perovskite quantum dot as saturable absorber
The saturable absorption layer of part, and it is poured between the first glass substrate and the second glass substrate, guarantees that the saturable to be formed is inhaled
Acceptor device has stronger third-order nonlinear optical effect and faster corresponding time, improves saturable absorber device
Performance.Saturable absorber device architecture provided in an embodiment of the present invention is simple simultaneously, can simplify saturable absorber device
The manufacture craft of part reduces the preparation cost of saturable absorber device.
Fig. 4 is the structural schematic diagram of another saturable absorber device provided in an embodiment of the present invention.In above-mentioned implementation
On the basis of example, which further includes the second end optical fiber flange plate 480.First glass substrate 410, the second glass
Substrate 420 and the perovskite quantum dot 430 being held between the first glass substrate and the second glass substrate are located at the second optical fiber
In ring flange 480；Second end optical fiber flange plate 480 include third connectivity port and the 4th connectivity port, third Optical fiber plug 440 with
The connection of third connectivity port, the 4th Optical fiber plug 450 are connect with the 4th connectivity port.The advantages of this arrangement are as follows passing through
All components of saturable absorption device shown in Fig. 4 are clamped securely to together by two end optical fiber flange plates 480, and enhancing can satisfy
With the transferability and practicability for absorbing device.
Fig. 5 is a kind of preparation method of saturable absorber device provided in an embodiment of the present invention, which includes:
S110, perovskite quantum dot is prepared.
Specifically, preparing perovskite quantum dot and may include:
Lead bromide and octadecylene are placed in heating device according to the first preset ratio, and by heating devices heat to first
Vacuumize process is carried out after preset temperature, removes oxygen and moisture in heating device；
Oleic acid and oleyl amine are added into heating device according to the second preset ratio, while injecting indifferent gas into heating device
Body guarantees that the reaction in heating device carries out in atmosphere of inert gases；
The oleic acid caesium of the first preset vol will be added after heating devices heat to the second preset temperature, it is default anti-by first
Heating device is subjected to cooling operation after between seasonable；
Mixture in heating device is subjected to centrifugal treating, obtains the solids in heating device；Solids is dissolved in
Toluene obtains perovskite quantum dot.
Illustratively, it is illustrated below with a kind of specific preparation process: firstly, by the lead bromide of 69mg and 5ml
Octadecylene is placed in 25ml three-necked flask, 100 DEG C is heated to flask using heating mantle, to the lead bromide and octadecylene in flask
Carrying out vacuumize process, oxygen and moisture therein are being taken out to remove in order to preferably remove oxygen and moisture therein
In vacuum process, octadecene solution is stirred using magnet rotor, which is about 60min.Then,
Inert gas (such as argon gas or nitrogen) is injected into three-necked flask to guarantee that the chemical reaction occurred in flask is in inertia
It is carried out in atmosphere, it at the same time, will be in 0.5ml oleic acid and 0.5ml oleyl amine injection three-necked flask.Next, flask is heated
To 150-170 DEG C, after temperature is stablized, 0.5ml oleic acid caesium is injected into flask, is carried out three-necked flask after chemical reaction 40S
Ice-water bath is cooled to room temperature.And then, the octadecene solution that perovskite quantum dot is mixed in three-necked flask is averagely dispensed into 2
In the centrifuge tube of 10ml, 1-1.5ml acetone is separately added into each centrifuge tube, if solution is added just less than 6ml in centrifuge tube
Hexane is supplied 6ml, and centrifuge tube is put into a centrifuge, centrifugal treating 5min, centrifugal rotational speed 10Krpm.Finally, removal
Solids in centrifuge tube is dissolved in 1ml toluene by solution in centrifuge tube, will be placed in a centrifuge at centrifugation dissolved with the toluene of solids
3min is managed, centrifugal rotational speed 4Krpm can be obtained perovskite quantum dot solution, perovskite quantum dot solution is placed in reagent bottle
Middle preservation abandons remaining insoluble solids object.
It should be noted that in the embodiment of the present invention perovskite quanta point material select be CsPbBr3, CsPbBr3 system
During standby, the proportion of each substance plays a significant role in CsPbBr3 synthesis.Lead bromide is the source of Pb and Br, oleic acid caesium
For the source of Cs, the proportionate relationship of three needs to substantially meet Cs:Pb:Br=1:1:3, since Pb and Br is mentioned by lead bromide
For, therefore while meeting Br, Pb is inevitable excessive, can be separated from solution by way of centrifugation after CsPbBr3 synthesis
Out, excessive Pb just dissolves in the solution.In addition, the volume ratio of the concentration and the two of oleic acid and oleyl amine is closed in CsPbBr3
Play a significant role in, oleic acid and oleyl amine are mainly as the surface ligand in synthesis, if its concentration is too small, perovskite can shape
Bodies, so as to cause quanta point material cannot be prepared；If its concentration is too big, the perovskite quantum dot prepared can be more
Remaining oleic acid and oleyl amine cladding, the characteristic for causing it to be not easy to show itself.Meanwhile the oleic acid and oleyl amine of proper ratio can be with
Adjust the pH value of solution in the preparation of perovskite quantum dot.In addition, the length in lead bromide and oleic acid caesium reaction time will determine to synthesize
Perovskite quantum dot size.If the reaction time is short, the size of perovskite quantum dot is small；If the reaction time is long, calcium titanium
The size of mine quantum dot is big.And the size of perovskite quantum dot is related to its modulation depth, modulation depth is bigger, perovskite quantum
The absorptivity of point is bigger, better to the narrowing result of pulse.
S120, the first optical fiber is provided and is attached to perovskite quantum dot on the end face of first end of the first optical fiber.
It is wrapped specifically, providing the first optical fiber and being attached to perovskite quantum dot on the end face of the first end of the first optical fiber
It includes:
First optical fiber is provided；
Perovskite quantum dot solution is immersed into the end face of the first end of first optical fiber；
Perovskite quantum dot solution is made annealing treatment.
Illustratively, firstly, taking an optical fiber, this optical fiber is the first optical fiber, using optical fiber wire stripper by the first optical fiber
The coat of wherein one end strip the length of about 30-40mm, will be naked and with alcohol paper by exposed optical fiber wiped clean
The optical fiber exposed is placed on optical fiber cutter, is cut first optical fiber and is made the length remainder of the exposed part of optical fiber about
10mm, meanwhile, which has 90 ° of corner cuts, this end face is the end face of the first end of the first optical fiber.It is noticeable
It is that the end face of the first end of the first optical fiber not allowed to touch other objects, it is avoided to be contaminated.Then, to the first optical fiber
The end face of first end carry out alcohol and be cleaned by ultrasonic 30S, and with being dried with nitrogen, then carry out acetone and be cleaned by ultrasonic 30S, and use nitrogen
Drying finally carries out isopropanol and is cleaned by ultrasonic 30S, and with being dried with nitrogen.Next, by the first of the first optical fiber cleaned up
The end face at end is immersed in perovskite quantum dot solution, is taken out after 40S, that is, quantum dot solution of completing to receive perovskite is attached to first
On the end face of the first end of optical fiber.Finally, the end face of the first end for the first optical fiber for being attached with perovskite quantum dot solution is existed
Annealing 30min is carried out at 120 DEG C, the advantages of this arrangement are as follows, the crystallinity of perovskite quanta point material can be improved
And crystal lattice orientation, and then improve the Third-order nonlinearity and response speed of perovskite quanta point material.
S130, the first Optical fiber plug is provided and the first end of the first optical fiber is inserted into the first Optical fiber plug.
The preparation method of saturable absorber device provided in an embodiment of the present invention, due to perovskite quantum dot preparation process
Simply, preparation cost is cheap, thus, the system simple with making step using the saturable absorber device of the perovskite quantum dot
Standby beneficial effect at low cost.
Fig. 6 is the preparation method of another saturable absorber device provided in an embodiment of the present invention, the preparation method packet
It includes:
S210, perovskite quantum dot is prepared.
S220, the first optical fiber is provided and is attached to perovskite quantum dot on the end face of first end of the first optical fiber.
S230, the first Optical fiber plug is provided and the first end of the first optical fiber is inserted into the first Optical fiber plug, the second light is provided
Fine and the second Optical fiber plug, and the first end of the second optical fiber is inserted into the second Optical fiber plug.
S240, the first end optical fiber flange plate being provided, the first end optical fiber flange plate includes the first connectivity port and second connection end mouth,
First Optical fiber plug is connect with the first connectivity port, the second Optical fiber plug is connect with second connection end mouth.
The preparation method of saturable absorber device provided in an embodiment of the present invention, by by the first Optical fiber plug and second
Optical fiber plug is linked together by the first end optical fiber flange plate, so that two of the perovskite quantum dot in saturable absorber device
Side is connect with optical fiber, has been reached convenient for by the beneficial effect in the saturable absorber device both ends incoming fiber optic laser.
Fig. 7 is the preparation method of another saturable absorber device provided in an embodiment of the present invention, the preparation method packet
It includes:
S310, perovskite quantum dot is prepared.
S320, the first glass substrate and the second glass substrate are provided, and perovskite quantum dot is instiled in the first glass base
Between plate and the second glass substrate.
Illustratively, it firstly, the first glass substrate is flat on experimental bench, is spread in its one side far from experimental bench
Spacer is anchored at the spacer spread on the first glass substrate by heating, spread spacer effect be
Uniform thickness is formed between first glass substrate and the second glass substrate.Then, the second glass substrate is flat on experimental bench
On, sealant is spread in its one side far from experimental bench, and padding can be added in sealant to enhance the resistance to compression of sealant
Ability, the effect for spreading sealant are to prevent the perovskite quantum dot solution of perfusion from leaking.Then by perovskite quantum dot
Solution is instilled into the sealant area defined of the second glass substrate, and the first glass substrate is scattered with to the one side of spacer
It is carried out with the one side that the second glass substrate bearing has perovskite quantum dot solution vacuum abutted.Finally, by ultraviolet irradiation or adding
The mode of heat hardens sealant.
It is not limited between the first glass substrate and the second glass substrate it should be noted that instiling perovskite quantum dot
Formula of dripping injection method, under the premise of not influencing perovskite quantum dot performance, can also be other modes, the present embodiment to this not
Make specific limit.
S330, third optical fiber and third Optical fiber plug are provided, the first end of third optical fiber is inserted into third Optical fiber plug, is mentioned
For the 4th optical fiber and the 4th Optical fiber plug, the first end of the 4th optical fiber is inserted into the 4th Optical fiber plug.
S340, third Optical fiber plug and the 4th Optical fiber plug are clamped into the first glass substrate, the second glass substrate and folder
The perovskite quantum dot being held between the first glass substrate and the second glass substrate.
It is worth noting that, third Optical fiber plug and the 4th Optical fiber plug are clamped the first glass substrate, the second glass base
During plate, the third optical fiber in third Optical fiber plug to be kept to be in vertical with the first glass substrate and the second glass substrate
State will keep the 4th optical fiber and the first glass substrate and the second glass substrate in the 4th Optical fiber plug to be in plumbness,
To ensure when the saturable absorber device is in optical fiber laser, the light that light source issues is passing through the saturable absorber
Loss is smaller when device.
The preparation method of saturable absorber device provided in an embodiment of the present invention, due to perovskite quantum dot preparation process
Simply, preparation cost is cheap, thus, the system simple with making step using the saturable absorber device of the perovskite quantum dot
Standby beneficial effect at low cost, also, since the two sides of the first glass substrate and the second glass substrate is all plane, it is conducive to calcium titanium
Mine quantum dot solution vertical folder reduces laser and passes through the saturable absorber between third Optical fiber plug and the 4th optical fiber
Loss when device.
Optionally, which can also include:
The second end optical fiber flange plate is provided, the second end optical fiber flange plate includes third connectivity port and the 4th connectivity port；
Third Optical fiber plug and the 4th Optical fiber plug are clamped into the first glass substrate, the second glass substrate and are held on the
Perovskite quantum dot between one glass substrate and the second glass substrate may include:
By the first glass substrate, the second glass substrate and it is held between the first glass substrate and the second glass substrate
Perovskite quantum dot is set in the second end optical fiber flange plate；Third Optical fiber plug is connect with third connectivity port, the 4th optical fiber
Plug is connect with the 4th connectivity port.
All components of saturable absorption device are clamped securely to together by the second end optical fiber flange plate, enhancing can
The transferability and practicability of saturated absorption device, and be conducive to perovskite quantum dot solution vertical folder and inserted in third optical fiber
Between head and the 4th optical fiber.
Fig. 8 is a kind of structural schematic diagram of mode locked fiber laser provided in an embodiment of the present invention.Referring to Fig. 8, the mode locking
Optical fiber laser includes the first pumping source 500 and the first resonant cavity 600 for connecting with the first pumping source 500, the first resonant cavity
It include saturable absorber device shown in FIG. 1 of the embodiment of the present invention in 600.
Optionally, the first resonant cavity 600 is first annular resonant cavity, and first annular resonant cavity further includes wavelength division multiplexer
611, gain fibre 612, fiber coupler 613 and optical fiber circulator 614, wherein the first pumping source 500 and wavelength division multiplexer
611 first input end connection, the output end of wavelength division multiplexer 611 pass through the input of gain fibre 612 and fiber coupler 613
End connection, the first output end of fiber coupler 613 connect with the first end of optical fiber circulator 614, and the of fiber coupler 613
Two output ends export laser, and the third end of optical fiber circulator 614 is connect with saturable absorber device 615, optical fiber circulator 614
Second end connect with the second input terminal of wavelength division multiplexer 611, form first annular resonant cavity.
Illustratively, it is 974nm semiconductor laser diode that the first pumping source 500, which is central wavelength, and pump light passes through wave
The pumping end of division multiplexer 611 enters gain fibre 612, and the length of gain fibre 612 can be 3-5m, and gain fibre 612 can
Think Yb dosed optical fiber, Er-doped fiber or thulium doped fiber.Then, fiber coupler 613, fiber coupling are reached by amplified light
613 splitting ratio of device is R:1-R, 0 < R < 100, wherein splitting ratio can be 10:90 or 20:80, and the light output of R% is first annular
Outside resonant cavity, the light continuation of 100%-R% is run in first annular resonant cavity.Then, the light of remaining 100%-R% passes through
Optical fiber circulator 614 is one-way transmitted to perovskite quantum dot saturable absorber device 615, returns wavelength division multiplexer 611,
In, optical fiber circulator 614 is for guaranteeing light unidirectional operation in first annular resonant cavity 610.
Fig. 9 is the structural schematic diagram of another mode locked fiber laser provided in an embodiment of the present invention.Referring to Fig. 9, the lock
Mode fiber laser includes the first pumping source 500 and the first resonant cavity 600 for connecting with the first pumping source 500, the first resonance
It include saturable absorber device shown in FIG. 1 of the embodiment of the present invention in chamber 600.
Optionally, the first resonant cavity 600 is linear resonant cavity, and linear resonant cavity further includes wavelength division multiplexer 621, gain light
Fibre 622, fiber coupler 623 and fully-reflected type bragg grating 624, wherein the first pumping source 500 and wavelength division multiplexer
621 first input end connection, saturable absorber device 625 are connect with the second input terminal of wavelength division multiplexer 621, and wavelength-division is multiple
It is connect by gain fibre 622 with the input terminal of fiber coupler 623 with the output end of device 621, the first of fiber coupler 623
Output end is connect with fully-reflected type bragg grating 624, and the second output terminal of fiber coupler 623 exports laser, is formed
Linear resonant cavity.
Illustratively, it is 974nm semiconductor laser diode that the first pumping source 500, which is central wavelength, and pump light passes through wave
The pumping end of division multiplexer 621 enters gain fibre 622, and gain fibre can be Yb dosed optical fiber, Er-doped fiber or thulium doped fiber.
Then, fiber coupler 623 is reached by amplified light, 623 splitting ratio of fiber coupler is R:1-R, 0 < R < 100, wherein
Splitting ratio can be 10:90 or 20:80, and outside the light output line style resonant cavity of R%, the light of 100%-R% passes through single mode optical fiber biography
Defeated arrival fully-reflected type fiber bragg grating 624, the reflected light being reflected back via fully-reflected type fiber bragg grating 624 according to
It is secondary that perovskite quantum dot saturable absorber device is reached by fiber coupler 623, gain fibre 622 and wavelength division multiplexer 621
Part 625.
Figure 10 is the structural schematic diagram of another mode locked fiber laser provided in an embodiment of the present invention.Referring to Fig.1 0, it should
Mode locked fiber laser includes the second pumping source 700 and the second resonant cavity 800 for connecting with the second pumping source 700, and second is humorous
It include saturable absorber device shown in Fig. 2 of the embodiment of the present invention, 3 or 4 in vibration chamber 800.Figure 10 is only with the second resonant cavity 800
In include being illustrated for saturable absorber device shown in Fig. 2 of the embodiment of the present invention.
Optionally, the second resonant cavity 800 is the second ring resonator, and the second ring resonator further includes wavelength division multiplexer
811, gain fibre 812, fibre optic isolater 813, connection optical fiber 814 and fiber coupler 815, wherein the second pumping source 700 with
The first input end of wavelength division multiplexer 811 connects, and the output end of wavelength division multiplexer 812 passes through gain fibre 812 and Fiber isolation
The input terminal of device 813 connects, and the output end of fibre optic isolater 813 is connect with one end of saturable absorber device 816, saturable
The other end of absorber devices 816 is connect by connecting optical fiber with the input terminal of fiber coupler 815, fiber coupler 815
First output end is connect with the second input terminal of wavelength division multiplexer 811, and the second output terminal of fiber coupler 815 exports laser,
Form the second ring resonator.
Illustratively, it is semiconductor laser that the second pumping source 700, which is central wavelength, and pump light passes through wavelength division multiplexer
811 pumping end enters gain fibre 812, and gain fibre 812 can be Yb dosed optical fiber, Er-doped fiber or thulium doped fiber.Then,
Fibre optic isolater 813 is reached by amplified light, enters connection optical fiber 814 using saturable absorber device 816,
In, connection optical fiber 814 is single mode optical fiber, and length can be 10m.Finally, fiber coupler 815 is reached, splitting ratio R:
1-R, 0 < R < 100, wherein splitting ratio can be 10:90 or 20:80, and the laser of R% exports outside the second ring resonator,
The laser continuation of 100%-R% is run in the second ring resonator.
Wherein, if gain fibre 812 is Yb dosed optical fiber, fibre optic isolater 813 is the Gao Gong that central wavelength is 1064nm
The optical fiber of rate application is to free space optical fiber isolator；First exciton of perovskite quantum dot saturable absorber device 816 is inhaled
Receipts peak is 1550nm；The core diameter for connecting optical fiber 814 is 6 μm, and outer diameter is 125 μm.The mode locked fiber laser can be realized center
Wavelength is the femtosecond laser output near 1064nm.
Wherein, if gain fibre 812 is Er-doped fiber, fibre optic isolater 813 is the Gao Gong that central wavelength is 1550nm
The optical fiber of rate application is to free space optical fiber isolator；First exciton of perovskite quantum dot saturable absorber device 816 is inhaled
Receipts peak is 1550nm；The core diameter that connection optical fiber 814 is is 9 μm, the general single mode fiber that outer diameter is 125 μm.The modelocked fiber swashs
It is the femtosecond laser output near 1550nm that light device, which can be realized central wavelength,.
Wherein, if gain fibre 812 is thulium doped fiber, fibre optic isolater 813 is the Gao Gong that central wavelength is 1980nm
The optical fiber of rate application is to free space optical fiber isolator；First exciton of perovskite quantum dot saturable absorber device 816 is inhaled
Receipts peak is 1980nm；The core diameter that connection optical fiber 814 is is 9 μm, the general single mode fiber that outer diameter is 125 μm.The modelocked fiber swashs
It is the femtosecond laser output near 1980nm that light device, which can be realized central wavelength,.
It should be noted that since perovskite material has faster response speed, thus reduce using perovskite amount
The mode locking time of the mode locked fiber laser of son point saturable absorber device；Since perovskite material has than semiconductor material
Broader Absorber Bandwidth, thus expand the work of the mode locked fiber laser using perovskite quantum dot saturable absorber device
Make wave band.Also, the adjusting of saturable absorber device modulation depth may be implemented by adjusting the size of perovskite quantum dot,
And then realize that mode locked fiber laser exports narrower pulse.In addition, any saturable absorber device of the embodiment of the present invention
It is small in size, thus the volume of the mode locked fiber laser using saturable absorber device is reduced, it improves modelocked fiber and swashs
The portability of light device.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (18)
1. a kind of saturable absorber device characterized by comprising
First optical fiber；
Perovskite quantum dot is attached on the end face of the first end of first optical fiber；
The first end of first Optical fiber plug, first optical fiber is inserted into first Optical fiber plug；
Wherein, the preparation process of the perovskite quantum dot is as follows: lead bromide and octadecylene are placed according to the first preset ratio
In heating device, and vacuumize process will be carried out after the heating devices heat to the first preset temperature, remove the heating dress
Oxygen and moisture in setting；Oleic acid and oleyl amine are added into the heating device according to the second preset ratio, while adding to described
Inert gas is injected in thermal, guarantees that the reaction in the heating device carries out in atmosphere of inert gases；By the heating
Device is heated to that the oleic acid caesium of the first preset vol is added after the second preset temperature, will be described after the first default reaction time
Heating device carries out cooling operation；Mixture in the heating device is subjected to centrifugal treating, is obtained in the heating device
Solids；The solids is dissolved in toluene, obtains perovskite quantum dot.
2. saturable absorber device according to claim 1, which is characterized in that the saturable absorber device also wraps
It includes:
The first end of second optical fiber and the second Optical fiber plug, second optical fiber is inserted into second Optical fiber plug；
First end optical fiber flange plate, including the first connectivity port and second connection end mouth, first Optical fiber plug and described first
Connectivity port connection, second Optical fiber plug are connect with the second connection end mouth.
3. saturable absorber device according to claim 2, which is characterized in that the end of the first end of second optical fiber
Perovskite quantum dot is attached on face.
4. saturable absorber device according to claim 1, which is characterized in that the end of the first end of first optical fiber
Face is vertical with the axis of first optical fiber.
5. a kind of saturable absorber device characterized by comprising
It first glass substrate, the second glass substrate and is held between first glass substrate and second glass substrate
Perovskite quantum dot；
The first end of third optical fiber and third Optical fiber plug, the third optical fiber is inserted into the third Optical fiber plug；
The first end of 4th optical fiber and the 4th Optical fiber plug, the 4th optical fiber is inserted into the 4th Optical fiber plug；
Wherein, the third Optical fiber plug is located at side of first glass substrate far from second glass substrate, described
4th Optical fiber plug is located at side of second glass substrate far from first glass substrate, the third Optical fiber plug and
4th Optical fiber plug clamp first glass substrate, the second glass substrate and be held on first glass substrate and
Perovskite quantum dot between second glass substrate.
6. saturable absorber device according to claim 5, which is characterized in that further include the second end optical fiber flange plate；
It first glass substrate, the second glass substrate and is held between first glass substrate and second glass substrate
Perovskite quantum dot be located in second end optical fiber flange plate；
Second end optical fiber flange plate includes third connectivity port and the 4th connectivity port, the third Optical fiber plug and described the
The connection of three connectivity ports, the 4th Optical fiber plug are connect with the 4th connectivity port.
7. a kind of preparation method of saturable absorber device, is used to prepare saturable absorber device as described in claim 1
Part characterized by comprising
Prepare perovskite quantum dot；
First optical fiber is provided and is attached to the perovskite quantum dot on the end face of first end of first optical fiber；
First Optical fiber plug is provided and the first end of first optical fiber is inserted into first Optical fiber plug；
The perovskite quantum dot for preparing specifically includes: lead bromide and octadecylene are placed in heating device according to the first preset ratio
In, and vacuumize process will be carried out after the heating devices heat to the first preset temperature, remove the oxygen in the heating device
Gas and moisture；Oleic acid and oleyl amine are added into the heating device according to the second preset ratio, while into the heating device
Inert gas is injected, guarantees that the reaction in the heating device carries out in atmosphere of inert gases；By the heating devices heat
The oleic acid caesium of the first preset vol is added after to the second preset temperature, by the heating device after the first default reaction time
Carry out cooling operation；Mixture in the heating device is subjected to centrifugal treating, obtains the solids in the heating device；
The solids is dissolved in toluene, obtains perovskite quantum dot.
8. preparation method according to claim 7, which is characterized in that further include:
Second optical fiber and the second Optical fiber plug are provided, and the first end of second optical fiber is inserted into second Optical fiber plug；
The first end optical fiber flange plate is provided, first end optical fiber flange plate includes the first connectivity port and second connection end mouth, by institute
It states the first Optical fiber plug to connect with first connectivity port, second Optical fiber plug is connect with the second connection end mouth.
9. a kind of preparation method of saturable absorber device, is used to prepare saturable absorber device as claimed in claim 5
Part, which is characterized in that
Prepare perovskite quantum dot；
First glass substrate and the second glass substrate are provided, and the perovskite quantum dot is instiled in first glass substrate
Between second glass substrate；
Third optical fiber and third Optical fiber plug are provided, the first end of the third optical fiber is inserted into the third Optical fiber plug；
4th optical fiber and the 4th Optical fiber plug are provided, the first end of the 4th optical fiber is inserted into the 4th Optical fiber plug；
By the third Optical fiber plug and the 4th Optical fiber plug clamp first glass substrate, the second glass substrate and
The perovskite quantum dot being held between first glass substrate and second glass substrate.
10. preparation method according to claim 9, which is characterized in that further include:
The second end optical fiber flange plate is provided, second end optical fiber flange plate includes third connectivity port and the 4th connectivity port；
By the third Optical fiber plug and the 4th Optical fiber plug clamp first glass substrate, the second glass substrate and
The perovskite quantum dot being held between first glass substrate and second glass substrate, comprising:
By first glass substrate, the second glass substrate and it is held on first glass substrate and the second glass base
Perovskite quantum dot between plate is set in second end optical fiber flange plate；
The third Optical fiber plug is connect with the third connectivity port, the 4th Optical fiber plug and the 4th connecting pin
Mouth connection.
11. the preparation method of saturable absorber device according to claim 9, which is characterized in that described to prepare calcium titanium
Mine quantum dot includes:
Lead bromide and octadecylene are placed in heating device according to the first preset ratio, and by the heating devices heat to first
Vacuumize process is carried out after preset temperature, removes oxygen and moisture in the heating device；
Oleic acid and oleyl amine are added into the heating device according to the second preset ratio, while injecting into the heating device lazy
Property gas, guarantees that the reaction in the heating device carries out in atmosphere of inert gases；
The oleic acid caesium of the first preset vol will be added after the heating devices heat to the second preset temperature, it is default anti-by first
The heating device is subjected to cooling operation after between seasonable；
Mixture in the heating device is subjected to centrifugal treating, obtains the solids in the heating device；
The solids is dissolved in toluene, obtains perovskite quantum dot.
12. a kind of lock film optical fiber laser, which is characterized in that connect including the first pumping source and with first pumping source
First resonant cavity includes saturable absorber device as described in claim 1 in first resonant cavity.
13. lock film optical fiber laser according to claim 12, which is characterized in that first resonant cavity is first annular
Resonant cavity, the first annular resonant cavity further include wavelength division multiplexer, gain fibre, fiber coupler and optical fiber circulator；
Wherein, first pumping source is connect with the first input end of the wavelength division multiplexer, the output of the wavelength division multiplexer
End is connect by the gain fibre with the input terminal of the fiber coupler, the first output end of the fiber coupler and institute
The first end connection of optical fiber circulator is stated, the second output terminal of the fiber coupler exports laser, the optical fiber circulator
Third end is connect with the saturable absorber device, and the second of the second end of the optical fiber circulator and the wavelength division multiplexer
Input terminal connection, forms first annular resonant cavity.
14. lock film optical fiber laser according to claim 12, which is characterized in that first resonant cavity is linear resonance
Chamber, the linear resonant cavity further include wavelength division multiplexer, gain fibre, fiber coupler and fully-reflected type bragg fiber light
Grid；
Wherein, first pumping source is connect with the first input end of the wavelength division multiplexer, the saturable absorber device
Connect with the second input terminal of the wavelength division multiplexer, the output end of the wavelength division multiplexer by the gain fibre with it is described
The input terminal of fiber coupler connects, the first output end of the fiber coupler and the fully-reflected type bragg grating
The second output terminal of connection, the fiber coupler exports laser, forms linear resonant cavity.
15. a kind of lock film optical fiber laser, which is characterized in that connect including the second pumping source and with second pumping source
Second resonant cavity includes the saturable absorber device as described in claim 2 or 5 in second resonant cavity.
16. lock film optical fiber laser according to claim 15, which is characterized in that second resonant cavity is the second annular
Resonant cavity, second ring resonator further include wavelength division multiplexer, gain fibre, fibre optic isolater, connection optical fiber and optical fiber
Coupler；
Wherein, second pumping source is connect with the first input end of the wavelength division multiplexer, the output of the wavelength division multiplexer
End is connect by gain fibre with the input terminal of the fibre optic isolater, the output end of the fibre optic isolater and the saturable
One end of absorber devices connects, and the other end of the saturable absorber device passes through the connection optical fiber and the optical fiber coupling
The input terminal of clutch connects, and the first output end of the fiber coupler is connect with the second input terminal of the wavelength division multiplexer,
The second output terminal of the fiber coupler exports laser, forms the second ring resonator.
17. the described in any item lock film optical fiber lasers in 3,14 or 16 according to claim 1, which is characterized in that the gain light
Fibre includes any one in Yb dosed optical fiber, Er-doped fiber or thulium doped fiber.
18. the described in any item lock film optical fiber lasers in 3,14 or 16 according to claim 1, which is characterized in that the optical fiber coupling
The splitting ratio of clutch is R:1-R, wherein the output end export ratio of the fiber coupler is the laser of R.
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