CN106125447A - A kind of full photo threshold device based on two-dimensional material saturated absorption and its preparation method and application - Google Patents
A kind of full photo threshold device based on two-dimensional material saturated absorption and its preparation method and application Download PDFInfo
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- CN106125447A CN106125447A CN201610647625.6A CN201610647625A CN106125447A CN 106125447 A CN106125447 A CN 106125447A CN 201610647625 A CN201610647625 A CN 201610647625A CN 106125447 A CN106125447 A CN 106125447A
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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
- G02F1/35—Non-linear optics
- G02F1/3523—Non-linear absorption changing by light, e.g. bleaching
Abstract
The invention provides a kind of full photo threshold device based on two-dimensional material saturated absorption, including the image intensifer arranged along optical propagation direction and the saturated absorbing body being connected with image intensifer, saturated absorbing body includes fiber waveguide and is coated on the two-dimensional material of light guide surface.This full photo threshold device architecture is very simple, and need not use nonlinear optical fiber or non-linear PPLN semiconductor device, it is to avoid the loss that prior art is brought is relatively big, poor stability or the defect of cost intensive.This full photo threshold device improves the signal to noise ratio receiving signal, improves signal quality, is conducive to improving optical communication system and receives judgement performance.Present invention also offers the preparation method of this full photo threshold device, including: two-dimensional material is coated on light guide surface, forms saturated absorbing body；Image intensifer is connected by optical fiber with absorber with full, forms full photo threshold device based on two-dimensional material saturated absorption.This full photo threshold device can be used for all-optical signal processing.
Description
Technical field
The present invention relates to photoelectron technical field, be specifically related to a kind of full light threshold based on two-dimensional material saturated absorption
Value device and its preparation method and application.
Background technology
All-optical signal processing is the important development trend of optical fiber telecommunications system and research direction.Based on NRZ
In (Return to Zero, RZ) or the digital optical communication system of burst pulse, such as at optical code division multiple access (Optical Code
Division Multiple Access, OCDMA) and Optical Time Division Multiplexing (Optical Time Division Multiple
Access, OTDMA) in communication system, the most all there is a certain amount of ground noise in the light pulse signal that system receiving terminal receives,
The introduced spontaneous emission noise (ASE noise) of such as amplifier, multiple access interference noise (MAI noise) etc., and this
Severe exacerbation is received the signal to noise ratio of light pulse signal by the existence of interference noise, receives judgement difficulty and strengthens, and tolerance limit reduces, and deteriorates
The receiving sensitivity of receiver, eventually affects the signal receiving performance of digital optical communication system.Therefore, how to eliminate and include
A MAI noise key issue in interior noise floor is light multiple access to communication system.
Full photo threshold technology is one of key technology in elimination MAI noise, and in recent years, this technology causes academia
Extensive concern.At present, existing multiple photo threshold technology is suggested, and the most most commonly seen method is to utilize optical fiber or quasiconductor
Nonlinear effect in medium realizes, it is achieved principle mainly includes adjusting based on self phase modulation (SPM), cross-phase
Effect processed (XPM) and second_harmonic generation (SHG).The core concept of these methods is: the information signal of receiving terminal typically has
There is sufficiently high Instantaneous peak power, nonlinear effect can be produced in nonlinear dielectric, by producing new frequency component, make
Obtain information signal to be saved；And the ground noises such as MAI are relatively low because of power, it is not enough to produce nonlinear effect, thus when it
By being filtered out time in nonlinear dielectric.
Threshold technology based on SPM and XPM typically requires longer nonlinear optical fiber, and relatively big and less stable is lost,
Being based particularly on the scheme of XPM, while required luminous power is higher, its system structure is the most extremely complex.
Reduce required optical signal power to simplify the system structure of threshold technology simultaneously, have scholar to propose utilization week
In phase poled lithium niobate (PPLN) crystal, SHG effect realizes the scheme of threshold value judgement, and the PPLN in system is a kind of novel
High non-linearity semiconductor device, when the pulse signal with MAI noise inputs in PPLN, and correct symbol pulses has enough peaks
Value power light pulses will produce SHG effect when PPLN transmits, and the peak power of MAI noise is not enough to produce SHG effect, logical
Cross to leach two frequency-doubled signals produced in PPLN and can realize threshold value judgement, but the optical signal of SHG wavelength will be difficult to
Optical fiber realizes transmission and processes.For solving this problem, it is thus proposed that the technical scheme that SHG with XPM is combined.?
In PPLN under the effect of XPM effect, two frequency doubled lights that SHG produces will be converted to C-band, with the threshold technology being based solely on SHG
Compare, the threshold technology after this improvement realize cost and complexity is greatly improved.Meanwhile, PPLN is novel as one
Semiconductor device, its cost is the highest, therefore, it is difficult to be used widely.
Therefore, these current threshold device need longer nonlinear optical fiber or need expensive PPLN semiconductor device
Part.Therefore, it is necessary to provide a kind of simple in construction, good stability and lower-cost full photo threshold device.
Summary of the invention
For solving the problems referred to above, the invention provides a kind of full photo threshold device based on two-dimensional material saturated absorption
Part, the simple in construction of described full photo threshold device based on two-dimensional material saturated absorption, stability is preferable, and cost is relatively low.
Present invention also offers the preparation method and application of described full photo threshold device based on two-dimensional material saturated absorption.
First aspect present invention provides a kind of full photo threshold device based on two-dimensional material saturated absorption, including edge
Image intensifer that optical propagation direction is arranged and the saturated absorbing body that is connected with described image intensifer, described saturated absorbing body includes
Fiber waveguide and be coated on the two-dimensional material of described light guide surface.
Wherein, at least during described two-dimensional material includes Graphene, black phosphorus, topological insulator and transient metal sulfide
Kind.
Wherein, described topological insulator includes Bi2Te3、Bi2Se3And Sb2Te3In at least one, described Transition Metal Sulfur
Compound includes at least one in molybdenum bisuphide and tungsten disulfide.
Wherein, described fiber waveguide is micro-nano fiber or nano wire.
Wherein, described image intensifer is erbium doped optical fibre light amplifier or semiconductor optical amplifier.
Wherein, light pulse signal peak power after described image intensifer amplifies is more than or equal to described saturated absorbing body
Peak value saturation power.
Wherein, described image intensifer is connected by optical fiber with described saturated absorbing body.
Based on two-dimensional material saturated absorption the full photo threshold device that first aspect present invention provides, including light amplification
Device and saturated absorbing body, this full photo threshold device architecture is very simple, and cost is relatively low.It addition, this full photo threshold device is not required to
The PPLN semiconductor device of nonlinear optical fiber to be used or costliness, thus avoid the loss using nonlinear optical fiber to bring relatively
Big and the defect of poor stability and relatively costly defect.This full photo threshold device may be used for improving the noise receiving signal
Ratio, improves signal quality, is conducive to improving optical communication system and receives judgement performance.
Second aspect present invention provides the preparation of a kind of full photo threshold device based on two-dimensional material saturated absorption
Method, comprises the following steps:
Two-dimensional material is coated on the surface of fiber waveguide, forms saturated absorbing body；
Image intensifer is provided, described image intensifer is connected with described saturated absorbing body, is formed saturated based on two-dimensional material
The full photo threshold device of absorption effect.
Wherein, use the method for optical fiber optical tweezers or the method for tear tape that described two-dimensional material is coated on described fiber waveguide
Surface.
The preparation method of based on two-dimensional material saturated absorption the full photo threshold device that second aspect present invention provides
Simply, easily operate.
Third aspect present invention provides the application of a kind of full photo threshold device based on two-dimensional material saturated absorption,
Described full photo threshold device based on two-dimensional material saturated absorption is used for all-optical signal processing, described full based on two-dimensional material
During all-optical signal processing, the method for noise in light pulse signal is reduced with the full photo threshold device of absorption effect, including
Following steps:
(1) draw the saturated absorption curve of saturated absorbing body, obtain according to described saturated absorption curve described
The average threshold power of saturated absorbing body and average saturation power；
(2) average threshold power and the described average saturation power of described saturated absorbing body are converted into peak threshold power
With peak value saturation power；
(3) use the image intensifer light pulse signal to receiving to carry out power amplification, make the light pulse signal after amplification
Peak power more than or equal to the peak value saturation power of described saturated absorbing body；
(4) in the light pulse signal input extremely described saturated absorbing body after amplifying, being more than in described light pulse signal
Or nearly transparent equal to the signal of peak value saturation power of described saturated absorbing body pass through, less than peak value in described light pulse signal
The signal of threshold power is strongly absorbed, thus reduces the noise in light pulse signal.
The application of based on two-dimensional material saturated absorption the full photo threshold device that third aspect present invention provides, described
Full photo threshold device based on two-dimensional material saturated absorption can be used for all-optical signal processing, thus reduces in light pulse signal
Noise.
To sum up, beneficial effect of the present invention includes the following aspects:
1, based on two-dimensional material saturated absorption the full photo threshold device that the present invention provides, structure is very simple, surely
Qualitative preferably, cost is relatively low.This full photo threshold device improves the signal to noise ratio receiving signal, improves signal quality, is conducive to
Improve optical communication system and receive judgement performance；
2, the preparation method of based on two-dimensional material saturated absorption the full photo threshold device that the present invention provides is simple, easily
Operation；
3, based on two-dimensional material saturated absorption the full photo threshold device that the present invention provides may be used for All-optical signal
Process, thus reduce the noise in light pulse signal.
Accompanying drawing explanation
Based on two-dimensional material saturated absorption the full photo threshold device architecture that Fig. 1 provides for an embodiment of the present invention
Schematic diagram；
The microstructure schematic diagram of the saturated absorbing body that Fig. 2 provides for an embodiment of the present invention；
The structure chart of the saturated absorbing body that Fig. 3 provides for an embodiment of the present invention；
The saturated absorption curve test schematic diagram of the saturated absorbing body that Fig. 4 provides for an embodiment of the present invention；
The saturated absorption curve chart of the saturated absorbing body that Fig. 5 provides for an embodiment of the present invention；
Fig. 6 is that full photo threshold device based on two-dimensional material saturated absorption reduces during all-optical signal processing
The effect schematic diagram of noise in light pulse signal.
Detailed description of the invention
The following stated is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as
Protection scope of the present invention.
First aspect present invention provides a kind of full photo threshold device based on two-dimensional material saturated absorption, including edge
Image intensifer that optical propagation direction is arranged and the saturated absorbing body that is connected with image intensifer, saturated absorbing body include fiber waveguide with
And it is coated on the two-dimensional material of light guide surface.
In an embodiment of the present invention, two-dimensional material includes Graphene, black phosphorus, topological insulator and transient metal sulfide
In at least one.
In the present invention one preferred implementation, topological insulator includes Bi2Te3、Bi2Se3And Sb2Te3In at least one.
In the present invention one preferred implementation, transient metal sulfide includes at least in molybdenum bisuphide and tungsten disulfide
Kind.
In the present invention one preferred implementation, the size of two-dimensional material is that industry routine selects, and it is special not do at this
Limit.
The present invention utilizes the saturated absorption of two-dimensional material to realize full photo threshold effect, the saturated absorption of two-dimensional material
Effect can allow the nearly transparent transmission of optical signal of high-peak power, and strongly inhales for the light ground noise signal that power is relatively low
Receiving, percent of pass is relatively low, and therefore this saturated absorption can receive optical signal and play the effect of full photo threshold optical communication system
Really.
In an embodiment of the present invention, fiber waveguide is micro-nano fiber or nano wire.
In the present invention one preferred implementation, a diameter of industry routine of micro-nano fiber selects, and does not do particular determination at this.
In the present invention one preferred implementation, nano wire includes semiconductor nanowires.
In the present invention one preferred implementation, a diameter of industry routine of nano wire selects, and does not do particular determination at this.
In the present invention one preferred implementation, when fiber waveguide is nano wire, optical fiber and nano wire are by the way of coupling
Connecting, concrete coupled modes are that industry routine selects.
Two-dimensional material is coated in fiber waveguide formation saturated absorbing body by the present invention, and this fiber waveguide can be with optical fiber telecommunications system
Compatibility, so that this full photo threshold device can be compatible with optical fiber telecommunications system, this full photo threshold device architecture is simple, stable
Property is strong.
In the present invention one preferred implementation, image intensifer is erbium doped optical fibre light amplifier (EDFA) or semiconductor optical amplification
Device (SOA).
In an embodiment of the present invention, light pulse signal peak power after image intensifer amplifies is more than or equal to saturated
The peak value saturation power of absorber.
The present invention uses image intensifer rationally to be amplified by the pulsed optical signals that system receives so that the light letter after amplification
Number power level is just at the zone of action of two-dimensional material saturated absorption, i.e. light pulse signal central peak power reaches
The saturation power point of two-dimensional material, nearly transparent passes through, and lower powered ground noise is in below threshold power point, by strongly
Suppression.
In an embodiment of the present invention, image intensifer is connected by optical fiber with saturated absorbing body.
In the present invention one preferred implementation, optical fiber is single-mode fiber.
In an embodiment of the present invention, this full photo threshold device can be connected with photoreceiver.
Based on two-dimensional material saturated absorption the full photo threshold device architecture that Fig. 1 provides for an embodiment of the present invention
Schematic diagram；Such as Fig. 1, in Fig. 1,1,3 represent to communicate with 5 and use single-mode fiber；2 represent image intensifer；4 represent saturated absorbing body；In figure
Arrow represent optical propagation direction.Image intensifer includes first input end and the first outfan, and saturated absorbing body includes that second is defeated
Entering end and the second outfan, first input end can be connected by optical fiber with other devices such as optical fiber telecommunications system.First outfan
Being connected by optical fiber with the second input, the second outfan can be connected by optical fiber with other receiving devices such as receiver.Here
Optical fiber can select communication single-mode fiber.From the full light threshold of the optical signal feeding present invention that optical fiber telecommunications system receives
In value device, the light pulse signal that input is come in contains ground noise, first these optical signals be admitted to image intensifer 2 (as
EDFA) being amplified, the optical signal after amplifying enters saturated absorbing body 4 by optical fiber 3, micro-due in saturated absorbing body
Nano fiber or the strong evanescent wave effect of nanowire surface and power density enhancing make light and be coated on light guide surface two
There is strong nonlinear interaction in dimension material, creates saturated absorption, and this saturated absorbing body will be to the pulse letter sent into
Number carry out full photo threshold effect, hence it is evident that restrain ground noise；Eventually pass the light pulse signal of full photo threshold shaping by the
Two outfan outputs, subsequently into the photodetector of receiver, are converted into the signal of telecommunication and are received judgement.
The microstructure schematic diagram of the saturated absorbing body that Fig. 2 provides for an embodiment of the present invention；Fig. 3 is that the present invention one is real
The structure chart of the saturated absorbing body that the mode of executing provides；In Fig. 2 and Fig. 3,41 represent fiber waveguide, and 42 representatives are coated on light guide surface
Two-dimensional material.It can be seen that the saturated absorbing body that the present invention provides includes fiber waveguide and is coated on light wave from Fig. 2 and Fig. 3
Lead the two-dimensional material on surface.The present invention will be provided with the two-dimensional material of saturated absorption and is wrapped in fiber waveguide, passes through fiber waveguide
The strong evanescent wave effect on surface and power density strengthen the two-dimensional material making light and be coated on light guide surface and occur strong
Nonlinear interaction.This nonlinear interaction show themselves in that the relatively low light ground noise signal of power to input absorbs strongly, pass through
Rate is relatively low, and the nearly transparent transmission of optical signal of the high-peak power for input.
The saturated absorption of two-dimensional material is used as full photo threshold device by the present invention, needs first optical communication system to be received
To pulsed optical signals image intensifer be amplified so that the central peak power of light pulse signal reaches saturated absorption curve
Saturation point or more than, and side ground noise power is less than the threshold power of saturated absorption curve；Light after amplifying
Pulse signal sends into the Surface coating fiber waveguide of two-dimensional material；Owing to the saturated absorption of two-dimensional material will suppress power
Relatively low ground noise, and the signal pulse possessing higher center peak power will nearly transparent transmit, and has thereby served to complete
Photo threshold effect, improves the signal to noise ratio receiving signal, improves signal quality, and beneficially raising system receives judgement performance.
Based on two-dimensional material saturated absorption the full photo threshold device that first aspect present invention provides, including light amplification
Device and saturated absorbing body, this full photo threshold device architecture is very simple, and cost is relatively low.It addition, full photo threshold device need not
Use nonlinear optical fiber or the PPLN semiconductor device of costliness, thus it is bigger to avoid the loss using nonlinear optical fiber to bring
With the defect of poor stability and relatively costly defect.This full photo threshold device may be used for improving the noise receiving signal
Ratio, improves signal quality, is conducive to improving optical communication system and receives judgement performance.
Second aspect present invention provides the preparation of a kind of full photo threshold device based on two-dimensional material saturated absorption
Method, comprises the following steps:
Two-dimensional material is coated on light guide surface, forms saturated absorbing body；
Image intensifer is provided, image intensifer is connected by optical fiber with absorber with full, is formed saturated based on two-dimensional material
The full photo threshold device of absorption effect.
In an embodiment of the present invention, the method that two-dimensional material is coated on light guide surface does not limits, such as, can adopt
By the method for optical fiber optical tweezers or tear tape, two-dimensional material being coated on light guide surface, these methods are the conventional selection of industry.
The preparation method of based on two-dimensional material saturated absorption the full photo threshold device that second aspect present invention provides
Simply, easily operate.
Third aspect present invention provides the application of a kind of full photo threshold device based on two-dimensional material saturated absorption,
The present invention full photo threshold device based on two-dimensional material saturated absorption is used for all-optical signal processing.
In an embodiment of the present invention, full photo threshold device is for carrying out shaping by the optical signal of photoreceiver to be entered.
In the present invention one preferred implementation, before all-optical signal processing is positioned at the photodetector of photoreceiver.
The present invention full photo threshold device reduces the ground noise interference for useful signal, plays and improves signal quality,
Improving the signal to noise ratio effect receiving optical signal, the light pulse signal eventually passing full photo threshold shaping enters the light electrical resistivity survey of receiver
Survey device, be converted into the signal of telecommunication and be received judgement, improve the bit error rate performance of receiver.
The full photo threshold device that the present invention provides, its cardinal principle is that the saturated absorption utilizing two-dimensional material realizes
The full light shaping effect of signal, it is therefore desirable to parameter is rationally set and makes incident light pulse be operated in saturated absorption region.
In an embodiment of the present invention, full photo threshold device based on two-dimensional material saturated absorption is used for All-optical signal
Processing procedure reduces the method for noise in light pulse signal, comprises the following steps:
(1) draw the saturated absorption curve of saturated absorbing body, obtain saturated absorption according to saturated absorption curve
The average threshold power of body and average saturation power；
(2) by the average threshold power of saturated absorbing body with average saturation power is converted into peak threshold power and peak value is satisfied
And power；
(3) use the image intensifer light pulse signal to receiving to carry out power amplification, make the light pulse signal after amplification
Peak power more than or equal to the peak value saturation power of saturated absorbing body；
(4) light pulse signal after amplifying inputs to saturated absorbing body, and being more than or equal in light pulse signal is full
Nearly transparent with the signal of the peak value saturation power of absorber pass through, less than the signal quilt of peak threshold power in light pulse signal
Strong absorption, thus reduce the noise in light pulse signal.
In the present invention one preferred implementation, in step (1), the saturated absorption being measured saturated absorbing body by experiment is imitated
Answering curve, the power working region for optical signal provides foundation.In step (1), saturated absorption curve experiments test process is such as
Shown in Fig. 4.The saturated absorption curve test schematic diagram of the saturated absorbing body that Fig. 4 provides for an embodiment of the present invention.Figure
In, 7,9,11,13,14 all represent to communicate with 18 and use single-mode fiber.
As shown in Figure 4, its test process is: the pulsed light that pulse laser 6 sends is after high power EDFA 8 amplifies
Send into variable optical attenuator 10, regulated by the decay size regulating tunable attenuator 10 and input to be coated with two dimension material
The luminous power size of the saturated absorbing body SA of material, in order to testing out saturated absorption curve, pulsed light is through tunable light decay
The photo-coupler 12 through 1 × 2, wherein of photo-coupler is also needed after subtracting device 10, before inputing to saturated absorbing body
Port exports and is used as monitoring input optical power size to light power meter 15, and another one port inputs to saturated absorbing body 16,
The outfan of saturated absorbing body 16 reconnects a light power meter 17 and is used for monitoring Output optical power size.According to Output optical power
Size draws saturated absorption curve, and saturated absorption curve chart is as shown in Figure 5.Fig. 5 is that an embodiment of the present invention carries
The saturated absorption curve chart of confession.Threshold point P can be drawn by saturated absorption curvea,thWith saturation point Pa,sa。
In the present invention one preferred implementation, in step (2), test out saturated absorption curve, needed pulse
The average light power of light is converted into peak optical powers, and its process is: if the pulsewidth of pulse laser is W, pulse laser
Cycle is T, and average light power is Pa, then peak optical powers PpFor:
Pp=Pa×T/W (1)
Saturated absorption curve corresponding peak threshold power P can be drawn by formula (1)p,thWith peak value saturation power Pp,sa:
Pp,th=Pa,th×T/W (2)
Pp,sa=Pa,sa×T/W (3)
In the present invention one preferred implementation, in step (3), draw the peak value of saturated absorption curve and correspondence
Power, the light pulse signal received system with image intensifer to being required for property carries out power amplification, and its process is: if
The optical signal pulsewidth that system receives is Ws, the signal period is Ts, for making peak power reach the peak of saturated absorption curve
Value saturation power Pp,sa, need with image intensifer EDFA, light pulse signal to be amplified, the average light power P after amplificationa,EDFA
It suffices that:
Pa,EDFA≥Pp,sa×Ws/Ts (4)
Formula (4) is that the output of the essential condition that can reach full photo threshold effect, only image intensifer meets public affairs
Formula (4), competence exertion goes out the saturated absorption ability as full photo threshold shaping.
Based on two-dimensional material saturated absorption the full photo threshold device that third aspect present invention provides may be used for entirely
Optical signal prosessing, thus reduce the noise in optical signal, improve the signal to noise ratio receiving signal, improve signal quality, favorably
Judgement performance is received in improving optical communication system.
Embodiment 1
A kind of full photo threshold device based on two-dimensional material saturated absorption, including the er-doped arranged along optical propagation direction
Optical amplifier fiber and saturated absorbing body, be connected by single-mode fiber between erbium doped optical fibre light amplifier with saturated absorbing body, full
Include micro-nano fiber with absorber and be coated on the Graphene on micro-nano fiber surface.
Embodiment 2
A kind of full photo threshold device based on two-dimensional material saturated absorption, partly leads including arrange along optical propagation direction
Body image intensifer and saturated absorbing body, be connected by single-mode fiber between semiconductor optical amplifier with saturated absorbing body, saturated suction
Acceptor includes micro-nano fiber and is coated on the black phosphorus on micro-nano fiber surface.
Embodiment 3
A kind of full photo threshold device based on two-dimensional material saturated absorption, including the er-doped arranged along optical propagation direction
Optical amplifier fiber and saturated absorbing body, be connected by single-mode fiber between erbium doped optical fibre light amplifier with saturated absorbing body, full
Include semiconductor nanowires with absorber and be coated on the Bi on semiconductor nanowires surface2Te3。
Embodiment 4
A kind of full photo threshold device based on two-dimensional material saturated absorption, including the er-doped arranged along optical propagation direction
Optical amplifier fiber and saturated absorbing body, be connected by single-mode fiber between erbium doped optical fibre light amplifier with saturated absorbing body, full
Include semiconductor nanowires with absorber and be coated on the molybdenum bisuphide on semiconductor nanowires surface.
Embodiment 5
The preparation method of a kind of full photo threshold device based on two-dimensional material saturated absorption, comprises the following steps:
Graphene is deposited by the method for optical fiber optical tweezers, is coated on the surface of micro-nano fiber, forms saturated absorbing body；
There is provided erbium doped optical fibre light amplifier, by erbium doped optical fibre light amplifier with described saturated absorbing body by single-mode fiber even
Connect, form full photo threshold device based on two-dimensional material saturated absorption.
Embodiment 6
The preparation method of a kind of full photo threshold device based on two-dimensional material saturated absorption, comprises the following steps:
By the method for tear tape method by graphene coated on the surface of semiconductor nanowires, form saturated absorbing body；
Semiconductor optical amplifier is provided, semiconductor optical amplifier is connected by single-mode fiber with described saturated absorbing body,
Wherein, semiconductor nanowires is connected by the way of coupling with single-mode fiber, is formed based on two-dimensional material saturated absorption
Full photo threshold device.
Effect example
Based on two-dimensional material saturated absorption the full photo threshold device that embodiment 1 prepares is used for all-optical signal processing
During reduce noise in light pulse signal, Fig. 6 is that full photo threshold device based on two-dimensional material saturated absorption is for entirely
Reduce the effect schematic diagram of noise in light pulse signal during optical signal prosessing, as in Fig. 6 it can be seen that light pulse signal warp
After crossing amplification, light pulse signal enters saturated absorbing body, and the peak value saturation power being in saturated absorbing body in light pulse signal is attached
Near pulse signal 20 is nearly transparent by saturated absorbing body, and is in the substrate near the peak threshold power of saturated absorbing body
Noise 21 is suppressed greatly.Therefore, based on two-dimensional material saturated absorption the full photo threshold device that the present invention provides
Noise in light pulse signal can be reduced, improve the quality of signal.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not 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, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a full photo threshold device based on two-dimensional material saturated absorption, it is characterised in that include along optical propagation direction
The image intensifer arranged and the saturated absorbing body that is connected with described image intensifer, described saturated absorbing body include fiber waveguide and
It is coated on the two-dimensional material of described light guide surface.
2. full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 1, it is characterised in that described
Two-dimensional material includes at least one in Graphene, black phosphorus, topological insulator and transient metal sulfide.
3. full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 2, it is characterised in that described
Topological insulator includes Bi2Te3、Bi2Se3And Sb2Te3In at least one, described transient metal sulfide includes molybdenum bisuphide
With at least one in tungsten disulfide.
4. full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 1, it is characterised in that described
Fiber waveguide is micro-nano fiber or nano wire.
5. full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 1, it is characterised in that described
Image intensifer is erbium doped optical fibre light amplifier or semiconductor optical amplifier.
6. full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 1, it is characterised in that light arteries and veins
Rush the signal peak power after described image intensifer the amplifies peak value saturation power more than or equal to described saturated absorbing body.
7. full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 1, it is characterised in that described
Image intensifer is connected by optical fiber with described saturated absorbing body.
8. the preparation method of a full photo threshold device based on two-dimensional material saturated absorption, it is characterised in that include with
Lower step:
Two-dimensional material is coated on the surface of fiber waveguide, forms saturated absorbing body；
Image intensifer is provided, described image intensifer is connected with described saturated absorbing body, formed based on two-dimensional material saturated absorption
The full photo threshold device of effect.
9. the preparation method of full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 8, it is special
Levy and be, use the method for optical fiber optical tweezers or the method for tear tape that described two-dimensional material is coated on the table of described fiber waveguide
Face.
10. based on two-dimensional material saturated absorption the full photo threshold device as described in any one of claim 1-7 is for complete
Reduce the method for noise in light pulse signal during optical signal prosessing, comprise the following steps:
(1) draw the saturated absorption curve of saturated absorbing body, obtain described saturated according to described saturated absorption curve
The average threshold power of absorber and average saturation power；
(2) average threshold power and the described average saturation power of described saturated absorbing body are converted into peak threshold power and peak
Value saturation power；
(3) use the image intensifer light pulse signal to receiving to carry out power amplification, make the peak of the light pulse signal after amplification
Value power is more than or equal to the peak value saturation power of described saturated absorbing body；
(4) the light pulse signal input after amplifying in described saturated absorbing body, in described light pulse signal more than or etc.
Signal in the peak value saturation power of described saturated absorbing body is nearly transparent to be passed through, less than peak threshold in described light pulse signal
The signal of power is strongly absorbed, thus reduces the noise in light pulse signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610647625.6A CN106125447B (en) | 2016-08-09 | 2016-08-09 | A kind of full photo threshold device and its preparation method and application based on two-dimensional material saturated absorption |
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| CN201610647625.6A CN106125447B (en) | 2016-08-09 | 2016-08-09 | A kind of full photo threshold device and its preparation method and application based on two-dimensional material saturated absorption |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| CN106684676A (en) * | 2016-12-07 | 2017-05-17 | 山东师范大学 | Saturable absorber device based on WS2 and preparation method and application of saturable absorber device |
| CN107104351A (en) * | 2017-05-23 | 2017-08-29 | 西北大学 | A kind of black phosphorus saturable absorber and the laser based on black phosphorus saturable absorber |
| CN107727595A (en) * | 2017-11-27 | 2018-02-23 | 山东师范大学 | U-shaped optical evanescent wave sensor device based on gold nano grain/tungsten disulfide and preparation method thereof |
| CN109884838A (en) * | 2019-03-20 | 2019-06-14 | 深圳大学 | Full photo threshold device and the preparation method of application, boron alkene quantum dot solution |
| CN110600985A (en) * | 2019-08-09 | 2019-12-20 | 武汉光谷信息光电子创新中心有限公司 | Waveguide structure, optical device and manufacturing method of waveguide structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106684676A (en) * | 2016-12-07 | 2017-05-17 | 山东师范大学 | Saturable absorber device based on WS2 and preparation method and application of saturable absorber device |
| CN107104351A (en) * | 2017-05-23 | 2017-08-29 | 西北大学 | A kind of black phosphorus saturable absorber and the laser based on black phosphorus saturable absorber |
| CN107727595A (en) * | 2017-11-27 | 2018-02-23 | 山东师范大学 | U-shaped optical evanescent wave sensor device based on gold nano grain/tungsten disulfide and preparation method thereof |
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| CN109884838A (en) * | 2019-03-20 | 2019-06-14 | 深圳大学 | Full photo threshold device and the preparation method of application, boron alkene quantum dot solution |
| CN109884838B (en) * | 2019-03-20 | 2023-07-28 | 深圳大学 | All-optical threshold device, application thereof and preparation method of boron alkene quantum dot solution |
| CN110600985A (en) * | 2019-08-09 | 2019-12-20 | 武汉光谷信息光电子创新中心有限公司 | Waveguide structure, optical device and manufacturing method of waveguide structure |
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