CN109471274A - All-optical, tunable filter and its application based on two-dimensional material - Google Patents
All-optical, tunable filter and its application based on two-dimensional material Download PDFInfo
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- CN109471274A CN109471274A CN201811057055.0A CN201811057055A CN109471274A CN 109471274 A CN109471274 A CN 109471274A CN 201811057055 A CN201811057055 A CN 201811057055A CN 109471274 A CN109471274 A CN 109471274A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0147—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on thermo-optic effects
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0126—Opto-optical modulation, i.e. control of one light beam by another light beam, not otherwise provided for in this subclass
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- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
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Abstract
The present invention provides a kind of all-optical, tunable filter based on two-dimensional material, comprising: be respectively used to input signal light and control the input terminal and control terminal of light, for by signal light and control it is photosynthetic and the first wavelength division multiplexer；For signal light and control light to be divided into the first coupler of two-way, wherein light is input to modulation arm and is handled all the way, another way light is input to reference arm and is handled；Modulation arm includes two-dimensional material-optical fiber composite construction, and two-dimensional material-optical fiber composite construction includes functionalization optical fiber and the two-dimensional material layer that is arranged on functionalization optical fiber；It is reflected back in the first coupler simultaneously by two-dimensional material-optical fiber composite construction processing signal light all the way and the another way signal light by reference arm processing and merges and interfere, the signal light after interfering is exported from the output end of all-optical, tunable filter.The present invention also provides the applications of all-optical, tunable filter, wherein the all-optical, tunable filter can be applied in tunable optical fiber laser.
Description
Technical field
The present invention relates to all optical communications and all-optical information process field, and in particular to a kind of Quan Guangke based on two-dimensional material
Tuned filter and its application.
Background technique
Tunable optic filter is the light of a kind of only permission specific wavelength by preventing the light of other wavelength from passing through and leading to
The adjustable device of bandgap wavelength can pick out required wavelength using tunable optic filter from numerous wavelength, and right
The wavelength carries out signal processing, therefore tunable optic filter can be used for tuning and selecting wavelength, filter out the noise of image intensifer,
The gain of balanced amplifier, multiplex/demultiplex optical signal etc. improve communication system to simplify the framework of optical communication network
Flexibility and efficiency, push the development of all-optical network.
Currently, although the structure design of tunable optic filter can be there are many Scheme Choice, such as fiber grating filter, sound
Optic tunable filter, enamel Fabry-Perot filters, birefringece crystal filter, tunable waveguide array etc., but these sides
Case is unable to satisfy the demand of full light application field.
Therefore, it is necessary to provide the novel all-optical, tunable filter of one kind to meet the needs of full light application field.
Summary of the invention
To solve the above problems, the all-optical, tunable filter that the present invention provides a kind of based on two-dimensional material and its answering
With.
First aspect present invention provides a kind of all-optical, tunable filter based on two-dimensional material, including input terminal, control
End, the first wavelength division multiplexer, the first isolator, the first coupler, modulation arm and reference arm processed；
The input terminal and the control terminal are separately positioned on first wavelength division multiplexer or respectively with described
The connection of one wavelength division multiplexer is respectively used to input signal light and control light；First wavelength division multiplexer is for merging the letter
Number light and the control light；First isolator is connect with first wavelength division multiplexer, for stopping the light of reverse transfers；
First coupler includes first, second and third and four ports, wherein the first port is connect with first isolator, institute
It states second port and the third port is connect with the modulation arm and the reference arm respectively, described in the 4th port conduct
The output end of all-optical, tunable filter；First coupler is used to the signal light and control light being divided into two-way, wherein
Light is input to the modulation arm by the second port and is handled all the way, and another way light is input to by the third port
The reference arm is handled；The modulation arm includes two-dimensional material-optical fiber composite construction, and the two-dimensional material-optical fiber is compound
Structure includes functionalization optical fiber and the two-dimensional material layer that is arranged on the functionalization optical fiber, and the two-dimensional material-optical fiber is compound
Structure changes the phase of the signal light by thermo-optic effect for absorbing the control light and generating heat；By described two
Dimension material-optical fiber composite construction processing signal light all the way and the another way signal light by reference arm processing reflect simultaneously
It returns in first coupler for making two paths of signals light merge and interfere, the signal light after interfering is from the output end
Output.
Wherein, include in the two-dimensional material layer graphene, transition metal chalcogenide, two-dimentional transition metal carbide,
At least one of black phosphorus and class black phosphorus material.
Wherein, the two-dimensional material layer with a thickness of 1-20 μm.
Wherein, the size of two-dimensional material is 0.5-500nm in the two-dimensional material layer.
Wherein, first coupler to it is described control light coupling ratio be 90:10, wherein 90% output end with it is described
Modulation arm connection, 10% output end are connect with the reference arm, and/or, coupling of first coupler to the signal light
Composition and division in a proportion is 50:50.
Wherein, the modulation arm further includes the first Faraday rotation connecting with the two-dimensional material-optical fiber composite construction
Reflecting mirror, first faraday rotator mirror are while the letters for reflecting two-way for by the signal light backtracking
Number light polarization state having the same.
Wherein, the reference arm includes sequentially connected variable optical attenuator and the second faraday rotator mirror, described
Variable optical attenuator is used to adjust the intensity of signal light in the reference arm；Second faraday rotator mirror is used for institute
The signal light polarization state having the same stated signal light backtracking, while reflect two-way.
Wherein, the control terminal is for connecting continuous wave laser, pulse laser or the modulation laser with information coding
Device, and/or, the input terminal swashs for connecting super continuum source, broadband ASE light source, narrowband continuous wave laser or narrowband DFB
Light device.
Second aspect of the present invention provides all-optical, tunable filter as described in relation to the first aspect in all-optical, tunable optical fiber
Application in laser, Fibre Optical Sensor, all-optical network, full optical oomputing and all-optical information processing.
Third aspect present invention provides a kind of tunable optical fiber laser, including pump light source, the second wavelength division multiplexer,
Gain fibre, the second isolator, the second coupler, laser output, control light source and full light as described in relation to the first aspect are adjustable
Humorous filter；Wherein, second wavelength division multiplexer includes pumping end, signal end and common end, the pump light source with it is described
Pump end connection；The common end, the gain fibre, second isolator and the second coupler are sequentially connected, described complete
The input terminal of optic tunable filter is connect with an output end of second coupler, the all-optical, tunable filtering
The control terminal of device is connect with the control light source, the output end of the all-optical, tunable filter and second wavelength division multiplexer
Signal end connection, the another output of second coupler is as laser output.
To sum up, beneficial effect of the present invention includes the following aspects:
A kind of all-optical, tunable filter based on two-dimensional material provided by the invention provides a kind of new wavelength tuning
Mode is overcome conventional tunable filter and needs to be driven using electric signal or the shortcomings that manually adjust, and wide bandwidth, low is realized
The complete light-operated wavelength tuning of loss, so as to be applied in all-optical network system etc..The all-optical, tunable filter knot simultaneously
Structure is simple, easily operated, has lower transmission loss, and can be compatible with existing optical fiber telecommunications system.The present invention mentions
A kind of all-optical, tunable filter based on two-dimensional material supplied can be used for realizing Output of laser wavelength in fiber ring laser system
Full photocontrol tuber function.
Detailed description of the invention
Fig. 1 is the structural representation for the all-optical, tunable filter based on two-dimensional material that an embodiment of the present invention provides
Figure；
Fig. 2 is the all-optical, tunable filter spectrum figure under two kinds of pump powers that embodiment 1 obtains；
Fig. 3 is the relational graph of the spectroscopic studying amount that embodiment 1 obtains and control optical power；
Fig. 4 is the structural schematic diagram for the tunable optical fiber laser that an embodiment of the present invention provides；
Fig. 5 is that the Output of laser wavelength that embodiment 2 obtains tunes spectrogram；
Appended drawing reference
All-optical, tunable filter of the 100- based on two-dimensional material, 1- input terminal, 2- control terminal, the first wavelength-division multiplex of 3-
Device, the first isolator of 4-, the first coupler of 5-, 6- two-dimensional material-optical fiber composite construction, the first faraday rotator mirror of 7-,
8- adjustable attenuator, the second faraday rotator mirror of 9-, 10- output end, 11- modulation arm, 12- reference arm, 20- pump light
Source, the second wavelength division multiplexer of 21-, 22- gain fibre, the second isolator of 23-, the second coupler of 24-, 25- laser output,
26- controls light source.It is connected by ordinary optic fibre (such as general single mode fiber) between each element.Arrow indicates light in figure
Transmission direction.
Specific embodiment
The following is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Refering to fig. 1, the embodiment of the invention provides a kind of all-optical, tunable filter 100 based on two-dimensional material, including
Input terminal 1, control terminal 2, the first wavelength division multiplexer 3, the first isolator 4, the first coupler 5, modulation arm 11, reference arm 12；
The input terminal 1 and control terminal 2 are separately positioned on first wavelength division multiplexer 3 or respectively with described first
Wavelength division multiplexer 3 connects, and is respectively used to input signal light and control light；First wavelength division multiplexer 3 is for merging the letter
Number light and control light；First isolator 4 is connect with first wavelength division multiplexer 3, for stopping the light of reverse transfers；Institute
Stating the first coupler 5 includes first, second and third and four ports, wherein the first port is connect with first isolator 4, institute
It states second port and the third port to connect with the modulation arm 11 and reference arm 12 respectively, described in the 4th port conduct
The output end 10 of all-optical, tunable filter；First coupler 5 is used to the signal light and control light being divided into two-way,
In all the way light modulation arm 11 be input to by the second port handled, another way light is input to by the third port
Reference arm 12 is handled；The modulation arm 11 includes two-dimensional material-optical fiber composite construction 6, and the two-dimensional material-optical fiber is compound
Structure 6 includes functionalization optical fiber and the two-dimensional material layer being arranged on the functionalization optical fiber, and the two-dimensional material-optical fiber is compound
Structure generates heat for absorbing the control light, changes the phase of the signal light by thermo-optic effect；By the two dimension
Material-processing of optical fiber composite construction 6 signal light all the way and the another way signal light by the reference arm 12 processing are anti-simultaneously
Be emitted back towards makes two paths of signals light merge and interferes in first coupler 5, and the signal light after interfering is from the output end
10 outputs.
A kind of all-optical, tunable filter based on two-dimensional material provided in an embodiment of the present invention, overall structure is one
Michelson interferometer (Michelson's interferometer).
In embodiment of the present invention, the input terminal 1 and the control terminal 2 can be arranged directly on first wavelength-division and answer
With the port for forming first wavelength division multiplexer on device, be also possible to an independent component and with first wavelength-division multiplex
Device is connected by optical waveguide.Optionally, the input terminal 1 and the control terminal 2 can be the components such as fibre-optical splice.
In embodiment of the present invention, the signal optical source that the input terminal 1 connects includes super continuum source, broadband ASE light
Source (broadband ASE light source), narrowband continuous wave laser or narrowband Distributed Feedback Laser (narrow-band distributed feedback laser).It can
Selection of land, the signal optical source that the input terminal 1 connects are 1550nm ASE light source or 1550nm Distributed Feedback Laser.
In embodiment of the present invention, the control light source that the control terminal 2 connects is continuous wave laser, pulse laser or band
There is the modulation laser of information coding.Optionally, the control light source that the control terminal 2 connects is 980nm continuous light source, 980nm
Light-pulse generator or 980nm modulated light source.
In embodiment of the present invention, first coupler 5 is to the coupling ratio of signal light according to two-dimensional material and each optical fiber
The loss of device is determined to obtain maximum signal light utilization ratio.Optionally, the coupling ratio is 50:50.
In embodiment of the present invention, the coupling ratio of 5 pairs of first coupler control light is answered as big as possible to obtain maximum
Control light utilization ratio, and control the biggish one end of optical coupling power and connect with the modulation arm 11.Optionally, the coupling
Composition and division in a proportion is 90:10, wherein 90% output end is connect with the modulation arm, 10% output end is connect with the reference arm.
In embodiment of the present invention, first isolator 4 is used to stop the light of reverse transfers, that is, stops to the input
The light at end and the control extreme direction transmission, the optical device for protecting the input terminal 1 and control terminal 2 to connect.
In embodiment of the present invention, the second end of the two-dimensional material-optical fiber composite construction 6 and first coupler 5
Mouth connection.
In embodiment of the present invention, the two-dimensional material-optical fiber composite construction 6 working principle are as follows: the two-dimensional material
For absorbing control light generation heat and increasing the temperature of itself and optical fiber, due to thermo-optic effect, two-dimensional material and light are caused
Fine refractive index changes, to change the phase of signal light.
In embodiment of the present invention, the functionalization optical fiber in the two dimension-optical fiber composite construction 6 includes micro-nano fiber, D-shaped
Optical fiber or optical fiber head.The two-dimensional material layer is by way of deposition or spin coating by two-dimensional material such as two-dimensional material nano flake
Or quantum dot is deposited in and is formed on the micro-nano fiber, D-shaped optical fiber or optical fiber head.Optionally, the micro-nano fiber is by common
Single mode optical fiber (SMF-28E) draw cone be prepared into.The diameter of micro-nano fiber is industry conventional selection, does not do particular determination herein.
Optionally, the D-type optical fiber is on standard single mode communication optical fiber, using optics micro-processing technology, by the cylinder of certain length
The fibre cladding rubbing down of shape falls a part, and D-type optical fiber is made.Optionally, the optical fiber head may be selected conventional use of optical fiber and connect
Head does not do particular determination herein.Optionally, the deposition or the concrete technology of spin coating are conventional selection, do not do special limit herein
It is fixed.
It include graphene, transition metal chalcogenide, two-dimentional transition in the two-dimensional material layer in embodiment of the present invention
At least one of metal carbides (MXene), black phosphorus and class black phosphorus material.Optionally, the class black phosphorus material include bismuth alkene,
The materials such as antimony alkene.Still optionally further, the bismuth alkene material includes bismuth alkene quantum dot or bismuth alkene nanometer sheet.Optionally, the mistake
Crossing metal chalcogenide includes molybdenum disulfide, tungsten disulfide etc..The selection of specific two-dimensional material is selected according to the actual situation
It selects.The thickness that the two-dimensional material layer on the functionalization optical fiber is arranged in the two-dimensional material-optical fiber composite construction can
Think nanoscale or for micron order.Optionally, the two-dimensional material layer with a thickness of 1-20 μm.Such as set by way of spin coating
Set the two-dimensional material layer on the functionalization optical fiber with a thickness of 1-10 μm, the functionalization is set by way of deposition
Two-dimensional material layer on optical fiber with a thickness of 1-20 μm.Still optionally further, the function is set by way of light deposition
Change optical fiber on two-dimensional material layer with a thickness of 1-5 μm.
In embodiment of the present invention, the two-dimensional material in the two-dimensional material layer is the structures such as nanometer sheet, quantum dot.It is optional
Ground, the size of two-dimensional material is 0.5-500nm in the two-dimensional material layer.Still optionally further, the size of the two-dimensional material
For 0.5-10nm.Still optionally further, in the two-dimensional material layer include bismuth alkene quantum dot, the bismuth alkene quantum dot with a thickness of
0.5-5nm, the atom number of plies of the bismuth alkene quantum dot are usually 1-15 layers, and the lateral dimension of the bismuth alkene quantum dot is 1-
10nm。
In embodiment of the present invention, the loss of the two-dimensional material-optical fiber composite construction is between 3-10dB, specifically,
Loss is 10dB.
As shown in Figure 1, the modulation arm 11 further includes compound with the two-dimensional material-optical fiber in embodiment of the present invention
First faraday rotator mirror 7 of structure connection, first faraday rotator mirror 7 are used to signal light original road
It returns, while ensuring the signal light polarization state having the same of two-way reflection.
As shown in Figure 1, the reference arm 12 includes sequentially connected 8 He of variable optical attenuator in embodiment of the present invention
Second faraday rotator mirror 9, the variable optical attenuator 8 are used to adjust the intensity of signal light in the reference arm 12, with
Keep the reference arm 12 and the signal light intensity in the modulation arm 11 identical or close；Second faraday rotator mirror
9 are used for the signal light backtracking, while can ensure the signal light polarization state having the same of two-way reflection.It is optional
Ground, the variable optical attenuator 8 are connect with the third port of first coupler 5.
Specifically, as shown in Figure 1, a kind of all-optical, tunable filter based on two-dimensional material provided in an embodiment of the present invention
100, overall structure is a Michelson interferometer, including input terminal 1, control terminal 2, the first wavelength division multiplexer 3, first
Isolator 4, the first coupler 5, two-dimensional material-optical fiber composite construction 6, the first faraday rotator mirror 7, adjustable optical attenuator
8, the second faraday rotator mirror 9, output end 10.Wherein, two-dimensional material-optical fiber composite construction 6 and the first Faraday rotation
Reflecting mirror 7 forms modulation arm 11, and adjustable optical attenuator 8 and the second faraday rotator mirror 9 form reference arm 12；Specifically,
Input terminal 1 and control terminal 2 are connect with two input terminals of the first wavelength division multiplexer 3 respectively, the common end of the first wavelength division multiplexer 3 with
The input terminal of first isolator 4 connects, and the output end of the first isolator 4 is connect with an input terminal of the first coupler 5, the first coupling
The second port of clutch 5 is connect with two-dimensional material-optical fiber composite construction 6, the third port and variable optical attenuation of the first coupler 5
Device 8 connects, and two-dimensional material-optical fiber composite construction 6 is connect with the first faraday rotator mirror 7, adjustable optical attenuator 8 and second
Faraday rotator mirror 9 connects, and the 4th port of the first coupler 5 is as output end 10.
Input terminal 1 and control terminal 2 are respectively used to input signal light and control light.First wavelength division multiplexer 3 is used for signal
Light and control light merge.First isolator 4 is used to stop the light of reverse transfers, and input terminal 1 and control terminal 2 is protected to connect
Optical device.First coupler 5 is used to signal light and control light being divided into two-way, and will reflect back into the signal light come and converge hair
It is exported after raw interference from output end 10.Two-dimensional material-optical fiber composite construction 6 generates heat for absorbing control light, passes through hot light
Effect changes the phase of signal light, to adjust the transmission peak wavelength of all-optical, tunable filter；Variable optical attenuator 8 is for adjusting
Light intensity ratio in two arms of Michelson interferometer is to obtain high interference contrast.
The all-optical, tunable filter that second aspect of the present invention provides can be applied to all-optical, tunable optical fiber laser, optical fiber
In sensing, all-optical network, full optical oomputing and all-optical information processing.
As shown in figure 4, third aspect present invention is provided and is built using all-optical, tunable filter proposed by the present invention
The structural schematic diagram of tunable optical fiber laser.
As shown in figure 4, a kind of tunable optical fiber laser 200, including pump light source 20, the second wavelength division multiplexer 21, increasing
Beneficial optical fiber 22, the second isolator 23, second coupler 24, laser output 25, control light source 26 and as described in relation to the first aspect
All-optical, tunable filter 100；Wherein, second wavelength division multiplexer 21 includes pumping end, signal end and common end, the pump
Pu light source 20 is connect with the pumping end；The common end, gain fibre 22, the second isolator 23 and the second coupler 24 are successively
Connection, the input terminal of the all-optical, tunable filter 100 are connect with an output end of second coupler 24, institute
The control terminal for stating all-optical, tunable filter 100 is connect with the control light source 26, the all-optical, tunable filter 100 it is defeated
Outlet is connect with the signal end of second wavelength division multiplexer 21, and the another output of second coupler 24 is as laser
Output end.
In embodiment of the present invention, the gain fibre includes Er-doped fiber, Yb dosed optical fiber or thulium doped fiber etc..
The beneficial effect comprise that
1, a kind of all-optical, tunable filter based on two-dimensional material provided by the invention overcomes conventional tunable filtering
The problem of device needs manually adjust, the non-full area of light manipulation of the brings such as electrical adjustable, realizes full area of light controllable adjustment, and energy
Enough wide bandwidth work, applicable spectral region greatly improve.
2, a kind of all-optical, tunable filter construction based on two-dimensional material provided by the invention is simple, easily operated, tool
There is lower transmission loss, and can be compatible with existing optical fiber telecommunications system.
3, the two-dimensional material that the present invention uses has stronger light thermal property, can generate after absorption control light higher
Temperature rise, so that signal light be made to obtain biggish phase shift.
4, the two-dimensional material huge number that the present invention uses, band gap size can be thick by changing material category, material
Degree and preparation process etc. are adjusted, to obtain the all-optical, tunable filter of various performances, and it is outstanding to cover infrared band
It is optical communicating waveband.
5, a kind of all-optical, tunable filter based on two-dimensional material provided by the invention can be used for all-optical network, Quan Guangji
The fields such as calculation, all-optical information processing, and can be used in tunable optical fiber laser.
Embodiment 1:
The present embodiment 1 provides a kind of all-optical, tunable filter based on two-dimensional material, wherein the present embodiment 1 it is defeated
Enter end connection 1550nm ASE light source；Control terminal connects 980nm continuous light source；Two-dimensional material-optical fiber composite construction is bismuth alkene-light
The bismuth alkene material layer on micro-nano fiber, bismuth alkene material is arranged in including micro-nano fiber and by light deposition mode in fiber composite structure
Material in layer is that average diameter is 3.6nm, and average thickness is the bismuth alkene quanta point material of 2.8nm, and bismuth alkene material layer is in micro-nano
On optical fiber with a thickness of 1-5 μm；Variable optical attenuator is type hand variable optical attenuator.
1550nm ASE light and the continuous light of 980nm are merged into all the way by the first wavelength division multiplexer, by the first isolator
Two-way is divided by the first coupler afterwards, all the way by being made of bismuth alkene-optical fiber composite construction and the first faraday rotator mirror
Modulation arm, for another way by the reference arm that is made of variable optical attenuator and the second faraday rotator mirror, 980nm is continuous
Light generates heat to change the phase of 1550nm ASE light after being absorbed by bismuth alkene, 1550nm ASE light is by the first Faraday rotation
Reflecting mirror and the second faraday rotator mirror backtracking, finally at the first coupler generate interference and it is defeated from output end
Out.Power by adjusting the continuous light of 980nm can change the phase-shift phase of 1550nm ASE light in modulation arm, to make to interfere
Effect changes, so that the transmission spectrum of output end moves left and right, to achieve the purpose that all-optical, tunable filter.Filter
Wave device transmission spectrum is a cosine function, i.e., (1+cos (Δ φ+φ s))/2, wherein Δ φ is between two-arm since length difference is made
At phase difference, φ s is phase shift caused by thermo-optic effect in modulation arm.
Fig. 2 gives the spectrogram of the all-optical, tunable filter when the continuous optical power of 980nm is respectively 0mW and 200mW,
As can be seen from the figure when changing the power of the continuous light of 980nm, the purpose of all-optical, tunable may be implemented.Fig. 3 gives
The relationship between spectroscopic studying periodicity and the power of the continuous light of 980nm is penetrated, obtains 11 free light when power is 420mW
The spectroscopic studying amount of spectral limit (FSR).Spectroscopic studying periodicity and the approximately linear relationship of power, slope 0.026FSR/mW.
It is understood that other embodiments of the invention use the two-dimensional material, no of the other sizes different from embodiment 1
Be same as embodiment 1 other kinds of two-dimensional material, different from embodiment 1 other thickness two-dimensional material layer or be different from
Signal light and control light of embodiment 1 etc., may be implemented the purpose of all-optical, tunable filtering.
Embodiment 2:
The present embodiment 2 provides the tunable fiber laser built using all-optical, tunable filter proposed by the present invention
Device, structural schematic diagram can refer to Fig. 4；
Tunable optical fiber laser 200 include pump light source 20, the second wavelength division multiplexer 21, gain fibre 22, second every
From device 23, the second coupler 24, laser output 25, control light source 26 and all-optical, tunable filter 100；Pump light source 20 with
The pumping end of second wavelength division multiplexer 21 connects；The common end of second wavelength division multiplexer 21, gain fibre 22, the second isolator 23
It is sequentially connected with the second coupler 24；One output end of the input terminal 1 of all-optical, tunable filter 100 and the second coupler 24
The control terminal 2 of connection, all-optical, tunable filter 100 is connect with control light source 26, the output end of all-optical, tunable filter 100
10 connect with the signal end of the second wavelength division multiplexer 21, and the another output of second coupler is as laser output
25.Wherein, gain fibre 22 here is specially Er-doped fiber.
The pump light that pump light source 20 exports provides gain after being absorbed by gain fibre 22；Second isolator 23 ensures optical fiber
Laser Unidirectional；Part energy in laser is exported out by the second coupler 24；Control light source 26 adjusts full light
The transmitted spectrum of tunable optic filter 100, to realize the tuber function of optical fiber laser.
Fig. 5 give when change control light source 26 power (power be respectively 0mW, 3.7mW, 7mW, 9.2mW and
When 17.8mW) optical fiber laser export spectrogram, it can be seen from the figure that change control optical power realize all-optical wave-length can
The purpose of tuning.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of all-optical, tunable filter based on two-dimensional material, which is characterized in that including input terminal, control terminal, first wave
Division multiplexer, the first isolator, the first coupler, modulation arm, reference arm and output end；
The input terminal and the control terminal be separately positioned on first wavelength division multiplexer or respectively with the first wave
Division multiplexer connection is respectively used to input signal light and control light；First wavelength division multiplexer is for merging the signal light
With the control light；First isolator is connect with first wavelength division multiplexer, for stopping the light of reverse transfers；It is described
First coupler includes first, second and third and four ports, wherein the first port is connect with first isolator, described the
Two-port netwerk and the third port are connect with the modulation arm and the reference arm respectively, and the 4th port is as the full light
The output end of tunable optic filter；First coupler is used to the signal light and control light being divided into two-way, wherein all the way
Light is input to the modulation arm by the second port and is handled, and another way light is input to described by the third port
Reference arm is handled；The modulation arm includes two-dimensional material-optical fiber composite construction, the two-dimensional material-optical fiber composite construction
Including functionalization optical fiber and the two-dimensional material layer being arranged on the functionalization optical fiber, the two-dimensional material-optical fiber composite construction
For absorbing the control light and generating heat, change the phase of the signal light by thermo-optic effect；By the two-dimentional material
Material-optical fiber composite construction processing signal light all the way and the another way signal light by reference arm processing are reflected back institute simultaneously
It states for making two paths of signals light merge and interfering in the first coupler, the signal light after interfering is defeated from the output end
Out.
2. all-optical, tunable filter as described in claim 1, which is characterized in that include graphite in the two-dimensional material layer
At least one of alkene, transition metal chalcogenide, two-dimentional transition metal carbide, black phosphorus and class black phosphorus material.
3. all-optical, tunable filter as described in claim 1, which is characterized in that the two-dimensional material layer with a thickness of 1-20
μm。
4. all-optical, tunable filter as described in claim 1, which is characterized in that two-dimensional material in the two-dimensional material layer
Having a size of 0.5-500nm.
5. all-optical, tunable filter as described in claim 1, which is characterized in that first coupler is to the control light
Coupling ratio be 90:10, wherein 90% output end is connect with the modulation arm, 10% output end and the reference arm connect
It connects, and/or, first coupler is 50:50 to the coupling ratio of the signal light.
6. all-optical, tunable filter as described in claim 1, which is characterized in that the modulation arm further includes and the two dimension
The first faraday rotator mirror of material-optical fiber composite construction connection, first faraday rotator mirror is for inciting somebody to action
The signal light backtracking, while the signal light polarization state having the same for reflecting two-way.
7. all-optical, tunable filter as described in claim 1, which is characterized in that the reference arm include it is sequentially connected can
Light attenuator and the second faraday rotator mirror, the variable optical attenuator is for adjusting signal light in the reference arm
Intensity；Second faraday rotator mirror is used for the signal light backtracking, while the signal light for reflecting two-way
Polarization state having the same.
8. all-optical, tunable filter as described in claim 1, which is characterized in that the control terminal is for connecting continuous laser
Device, pulse laser or the modulation laser with information coding, and/or, the input terminal for connect super continuum source,
Broadband ASE light source, narrowband continuous wave laser or narrowband Distributed Feedback Laser.
9. if all-optical, tunable filter of any of claims 1-8 is in all-optical, tunable optical fiber laser, optical fiber
Application in sensing, all-optical network, full optical oomputing and all-optical information processing.
10. a kind of tunable optical fiber laser, which is characterized in that including pump light source, the second wavelength division multiplexer, gain fibre,
Second isolator, the second coupler, laser output, control light source and such as described in any item full light of claim 1-8 are adjustable
Humorous filter；Wherein, second wavelength division multiplexer includes pumping end, signal end and common end, the pump light source with it is described
Pump end connection；The common end, the gain fibre, second isolator and the second coupler are sequentially connected, described complete
The input terminal of optic tunable filter is connect with an output end of second coupler, the all-optical, tunable filtering
The control terminal of device is connect with the control light source, the output end of the all-optical, tunable filter and second wavelength division multiplexer
Signal end connection, the another output of second coupler is as laser output.
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| US20030123781A1 (en) * | 2002-01-03 | 2003-07-03 | Rockwell David A. | Differential phase shift keyed demodulator system |
| CN101013791A (en) * | 2007-02-05 | 2007-08-08 | 北京交通大学 | Ring tunable single-frequency single-polarization fiber laser |
| CN102608824A (en) * | 2011-11-23 | 2012-07-25 | 深圳大学 | Tunable optical frequency converter based on phase modulator |
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