CN106125447B - A kind of full photo threshold device and its preparation method and application based on two-dimensional material saturated absorption - Google Patents
A kind of full photo threshold device and its preparation method and application based on two-dimensional material saturated absorption Download PDFInfo
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- CN106125447B CN106125447B CN201610647625.6A CN201610647625A CN106125447B CN 106125447 B CN106125447 B CN 106125447B CN 201610647625 A CN201610647625 A CN 201610647625A CN 106125447 B CN106125447 B CN 106125447B
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- 229910052691 Erbium Inorganic materials 0.000 claims description 8
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical group [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910021389 graphene Inorganic materials 0.000 claims description 6
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- 229910052976 metal sulfide Inorganic materials 0.000 claims description 5
- 230000001052 transient effect Effects 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 4
- 238000012576 optical tweezer Methods 0.000 claims description 4
- 229910002899 Bi2Te3 Inorganic materials 0.000 claims description 3
- 229910017629 Sb2Te3 Inorganic materials 0.000 claims description 3
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims description 3
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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
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- G02F1/3523—Non-linear absorption changing by light, e.g. bleaching
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Abstract
The present invention provides a kind of full photo threshold device based on two-dimensional material saturated absorption, including the image intensifer being arranged along optical propagation direction and the saturated absorbing body connecting with image intensifer, saturated absorbing body includes optical waveguide and the two-dimensional material for being coated on light guide surface.The full photo threshold device architecture is very simple, and does not need that perhaps non-linear PPLN semiconductor devices avoids prior art bring that defect larger, that stability is poor or expensive is lost using nonlinear optical fiber.The full photo threshold device improves the signal-to-noise ratio for receiving signal, improves signal quality, is conducive to improve optical communication system reception judgement performance.The present invention also provides the preparation methods of the full photo threshold device, comprising: two-dimensional material is coated on light guide surface, forms saturated absorbing body；Image intensifer is connect with absorber by optical fiber with full, forms the full photo threshold device based on two-dimensional material saturated absorption.The full photo threshold device can be used for all-optical signal processing.
Description
Technical field
The present invention relates to photoelectron technical fields, and in particular to a kind of full light threshold based on two-dimensional material saturated absorption
It is worth device and its preparation method and application.
Background technique
All-optical signal processing is the important development trend and research direction of optical fiber telecommunications system.It is being based on zero code
In (Return to Zero, RZ) or the digital optical communication system of burst pulse, such as in 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, often all there is a certain amount of ground noise in the light pulse signal that system receiving terminal receives,
Such as spontaneous emission noise (ASE noise), multiple access interference noise (MAI noise) that amplifier is introduced etc., and it is this
Severe exacerbation is received the signal-to-noise ratio of light pulse signal by the presence of interference noise, is received judgement difficulty and is increased, tolerance reduces, and deteriorates
The receiving sensitivity of receiver eventually affects the signal receiving performance of digital optical communication system.Therefore, how to eliminate including
Noise floor including MAI noise is a critical issue in light multiple access to communication system.
Full photo threshold technology is one of the key technology eliminated in MAI noise, and in recent years, this technology causes academia
Extensive concern.Currently, being suggested there are many photo threshold technology, wherein most commonly seen method is to utilize optical fiber or semiconductor
For nonlinear effect in medium come what is realized, realization principle mainly includes based on self phase modulation (SPM), cross-phase tune
Effect (XPM) processed and second_harmonic generation (SHG).The core concept of these methods is: the information signal of receiving end generally has
There is sufficiently high Instantaneous peak power, nonlinear effect can be generated in nonlinear dielectric, by generating new frequency component, makes
Information signal is obtained to be saved；And the ground noises such as MAI are not enough to generate nonlinear effect because power is lower, thus work as it
It will be filtered out when by nonlinear dielectric.
Threshold technology based on SPM and XPM usually requires longer nonlinear optical fiber, and the larger and stability of loss is poor,
It is based particularly on the scheme of XPM, higher simultaneously in required optical power, system structure is also extremely complex.
In order to simplify the system structure of threshold technology while reduce required optical signal power, there is scholar to propose and utilize week
SHG effect realizes the scheme of threshold value judgement in phase poled lithium niobate (PPLN) crystal, and the PPLN in system is a kind of novel
High non-linearity semiconductor devices, in the pulse signal input PPLN with MAI noise, correct symbol pulses have enough peaks
SHG effect will be generated when PPLN is transmitted by being worth power light pulses, and the peak power of MAI noise is not enough to generate SHG effect, leads to
It crosses two frequency-doubled signals that will be generated in PPLN and filters out and threshold value judgement can be realized, however the optical signal of SHG wavelength will be difficult to
Transmission and processing are realized in optical fiber.To solve this problem, it is thus proposed that the technical solution that combines SHG with XPM.?
In PPLN under the action of XPM effect, two frequency doubled lights that SHG is generated will be converted to C-band, with the threshold technology for being based solely on SHG
It compares, the cost of implementation and complexity of this improved threshold technology greatly improve.At the same time, PPLN is as a kind of novel
Semiconductor devices, cost is extremely high, and therefore, it is difficult to be used widely.
Therefore, these current threshold devices need longer nonlinear optical fiber or need expensive PPLN semiconductor device
Part.Therefore, it is necessary to provide, a kind of structure is simple, stability is good and lower-cost full photo threshold device.
Summary of the invention
To solve the above problems, the present invention provides a kind of full photo threshold device based on two-dimensional material saturated absorption
The structure of part, the full photo threshold device based on two-dimensional material saturated absorption is simple, and stability is preferable, and cost is relatively low.
The preparation method and application of the present invention also provides the 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
The image intensifer of optical propagation direction setting and the saturated absorbing body connecting with the image intensifer, the saturated absorbing body include
Optical waveguide and the two-dimensional material for being coated on the light guide surface.
Wherein, the two-dimensional material includes at least one in graphene, black phosphorus, topological insulator and transient metal sulfide
Kind.
Wherein, the topological insulator includes Bi2Te3、Bi2Se3And Sb2Te3At least one of, the Transition Metal Sulfur
Compound includes at least one of molybdenum disulfide and tungsten disulfide.
Wherein, the optical waveguide is micro-nano fiber or nano wire.
Wherein, the image intensifer is erbium doped optical fibre light amplifier or semiconductor optical amplifier.
Wherein, light pulse signal is greater than or equal to the saturated absorbing body through the amplified peak power of the image intensifer
Peak value saturation power.
Wherein, the image intensifer is connect with the saturated absorbing body by optical fiber.
The full photo threshold device based on two-dimensional material saturated absorption that first aspect present invention provides, including light amplification
Device and saturated absorbing body, the full photo threshold device architecture is very simple, and cost is relatively low.In addition, being not required in the full photo threshold device
Will use nonlinear optical fiber or valuableness PPLN semiconductor devices, so as to avoid use nonlinear optical fiber bring loss compared with
The defect of big and stability difference defect and higher cost.The full photo threshold device can be used for improving the noise for receiving signal
Than improving signal quality, being conducive to improve optical communication system reception judgement performance.
Second aspect of the present invention provides a kind of preparation of full photo threshold device based on two-dimensional material saturated absorption
Method, comprising the following steps:
Two-dimensional material is coated on to the surface of optical waveguide, forms saturated absorbing body；
Image intensifer is provided, the image intensifer is connect with the saturated absorbing body, is formed and is saturated based on two-dimensional material
The full photo threshold device of sink effect.
Wherein, the two-dimensional material is coated on by the optical waveguide using the method for optical fiber optical tweezers or the method for tear tape
Surface.
The preparation method for the full photo threshold device based on two-dimensional material saturated absorption that second aspect of the present invention provides
Simply, easy to operate.
Third aspect present invention provides a kind of application of full photo threshold device based on two-dimensional material saturated absorption,
The 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
The method for being used to during all-optical signal processing reduce noise in light pulse signal with the full photo threshold device of sink effect, including
Following steps:
(1) the saturated absorption curve for drawing saturated absorbing body obtains described according to the saturated absorption curve
The average threshold power and average saturation power of saturated absorbing body；
(2) the average threshold power of the saturated absorbing body and the average saturation power are converted into peak threshold power
With peak value saturation power；
(3) power amplification is carried out to the light pulse signal received using image intensifer, makes amplified light pulse signal
Peak power be greater than or equal to the saturated absorbing body peak value saturation power；
(4) amplified light pulse signal is input in the saturated absorbing body, being greater than in the light pulse signal
Or pass through equal to the signal of the peak value saturation power of the saturated absorbing body is nearly transparent, peak value is less than in the light pulse signal
The signal of threshold power is strongly absorbed, to reduce the noise in light pulse signal.
The application for the full photo threshold device based on two-dimensional material saturated absorption that third aspect present invention provides, it is described
Full photo threshold device based on two-dimensional material saturated absorption can be used for all-optical signal processing, to reduce in light pulse signal
Noise.
To sum up, beneficial effect of the present invention includes the following aspects:
1, the full photo threshold device provided by the invention based on two-dimensional material saturated absorption, structure is very simple, surely
Qualitative preferable, cost is relatively low.The full photo threshold device improves the signal-to-noise ratio for receiving signal, improves signal quality, is conducive to
It improves optical communication system and receives judgement performance；
2, the preparation method of the full photo threshold device provided by the invention based on two-dimensional material saturated absorption is simple, easy
Operation；
3, the full photo threshold device provided by the invention based on two-dimensional material saturated absorption can be used for All-optical signal
Processing, to reduce the noise in light pulse signal.
Detailed description of the invention
Fig. 1 is the full photo threshold device architecture based on two-dimensional material saturated absorption that an embodiment of the present invention provides
Schematic diagram；
Fig. 2 is the microstructure schematic diagram for the saturated absorbing body that an embodiment of the present invention provides；
Fig. 3 is the structure chart for the saturated absorbing body that an embodiment of the present invention provides；
Fig. 4 is the saturated absorption curve test schematic diagram for the saturated absorbing body that an embodiment of the present invention provides；
Fig. 5 is the saturated absorption curve graph for the saturated absorbing body that an embodiment of the present invention provides；
Fig. 6 is the full photo threshold device based on two-dimensional material saturated absorption for reducing during all-optical signal processing
The effect diagram of noise in light pulse signal.
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.
First aspect present invention provides a kind of full photo threshold device based on two-dimensional material saturated absorption, including edge
The image intensifer of optical propagation direction setting and the saturated absorbing body that is connect with image intensifer, saturated absorbing body include optical 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
At least one of.
In a preferred embodiment of the invention, topological insulator includes Bi2Te3、Bi2Se3And Sb2Te3At least one of.
In a preferred embodiment of the invention, transient metal sulfide includes at least one in molybdenum disulfide and tungsten disulfide
Kind.
In a preferred embodiment of the invention, the size of two-dimensional material is industry conventional selection, and it is special not do herein
It limits.
The present invention realizes full photo threshold effect, the saturated absorption of two-dimensional material using the saturated absorption of two-dimensional material
Effect can allow the nearly transparent transmission of the optical signal of high-peak power, and smooth ground noise signal lower for power is inhaled strongly
Receive, percent of pass is lower, therefore the saturated absorption can the reception optical signal to optical communication system play the effect of full photo threshold
Fruit.
In an embodiment of the present invention, optical waveguide is micro-nano fiber or nano wire.
In a preferred embodiment of the invention, the diameter of micro-nano fiber is industry conventional selection, does not do particular determination herein.
In a preferred embodiment of the invention, nano wire includes semiconductor nanowires.
In a preferred embodiment of the invention, the diameter of nano wire is industry conventional selection, does not do particular determination herein.
In a preferred embodiment of the invention, when optical waveguide is nano wire, optical fiber and nano wire are by way of coupling
Connection, specific coupled modes are industry conventional selection.
Two-dimensional material is coated in optical waveguide and forms saturated absorbing body by the present invention, which can be with optical fiber telecommunications system
Compatible, so that the full photo threshold device can be compatible with optical fiber telecommunications system, the full photo threshold device architecture is simple, stablizes
Property is strong.
In a preferred embodiment of the invention, 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 is greater than or equal to saturation through the amplified peak power of image intensifer
The peak value saturation power of absorber.
The present invention is rationally amplified the received pulsed optical signals of system using image intensifer, so that amplified light is believed
Just at the zone of action of two-dimensional material saturated absorption, i.e. light pulse signal central peak power reaches for number power level
The saturation power point of two-dimensional material, it is nearly transparent to pass through, and the ground noise of low-power is in threshold power point hereinafter, strong
Inhibit.
In an embodiment of the present invention, image intensifer is connect with saturated absorbing body by optical fiber.
In a preferred embodiment of the invention, optical fiber is single mode optical fiber.
In an embodiment of the present invention, which can connect with photoreceiver.
Fig. 1 is the full photo threshold device architecture based on two-dimensional material saturated absorption that an embodiment of the present invention provides
Schematic diagram；Such as Fig. 1,1,3 and 5 represent communication single mode optical fiber in Fig. 1；2 represent image intensifer；4 represent saturated absorbing body；In figure
Arrow indicate optical propagation direction.Image intensifer includes first input end and the first output end, and saturated absorbing body includes second defeated
Enter end and second output terminal, first input end can be connect with other devices such as optical fiber telecommunications system by optical fiber.First output end
It is connected with the second input terminal by optical fiber, second output terminal can be connect with other receiving devices such as receiver by optical fiber.Here
Optical fiber can choose communication single mode optical fiber.The optical signal received from optical fiber telecommunications system is sent into full light threshold of the invention
It is worth in device, the light pulse signal inputted into contains ground noise, these optical signals are admitted to image intensifer 2 (such as first
EDFA it) amplifies, saturated absorbing body 4 is entered by optical fiber 3 by amplified optical signal, due to micro- in saturated absorbing body
The strong evanescent wave effect and power density of nano fiber or nanowire surface enhance so that light and being coated on the two of light guide surface
Strong nonlinear interaction occurs for dimension material, produces saturated absorption, this saturated absorbing body will believe the pulse of feeding
Number carry out full photo threshold effect, hence it is evident that restrain ground noise；Finally the light pulse signal Jing Guo full photo threshold shaping passes through the
The output of two output ends, subsequently into the photodetector of receiver, is converted into electric signal and carries out reception judgement.
Fig. 2 is the microstructure schematic diagram for the saturated absorbing body that an embodiment of the present invention provides；Fig. 3 is that the present invention one is real
The structure chart for the saturated absorbing body that the mode of applying provides；In Fig. 2 and Fig. 3,41 represent optical waveguide, and 42 representatives are coated on light guide surface
Two-dimensional material.As can be seen that saturated absorbing body provided by the invention includes optical waveguide and is coated on light wave from Fig. 2 and Fig. 3
Lead the two-dimensional material on surface.The two-dimensional material that the present invention will be provided with saturated absorption is wrapped in optical waveguide, passes through optical waveguide
The strong evanescent wave effect and power density on surface enhance so that light occurs strongly with the two-dimensional material for being coated on light guide surface
Nonlinear interaction.The nonlinear interaction shows themselves in that smooth ground noise signal lower to the power of input absorbs strongly, passes through
Rate is lower, and transmission nearly transparent for the optical signal of the high-peak power of input.
The saturated absorption of two-dimensional material is used as full photo threshold device by the present invention, needs first to receive optical communication system
To pulsed optical signals amplified with image intensifer so that the central peak power of light pulse signal reaches saturated absorption curve
Saturation point or more, and side ground noise power is lower than the threshold power of saturated absorption curve；By the light after amplification
Pulse signal is sent into the optical waveguide that surface has coated two-dimensional material；Since the saturated absorption of two-dimensional material will inhibit power
Lower ground noise, and the signal pulse for having higher center peak power nearly transparent will transmit, therefore play complete
Photo threshold effect improves the signal-to-noise ratio for receiving signal, improves signal quality, is conducive to raising system and receives judgement performance.
The full photo threshold device based on two-dimensional material saturated absorption that first aspect present invention provides, including light amplification
Device and saturated absorbing body, the full photo threshold device architecture is very simple, and cost is relatively low.In addition, not needed in full photo threshold device
Using nonlinear optical fiber or the PPLN semiconductor devices of valuableness, so as to avoid using the loss of nonlinear optical fiber bring larger
With the defect of stability difference and the defect of higher cost.The full photo threshold device can be used for improving the noise for receiving signal
Than improving signal quality, being conducive to improve optical communication system reception judgement performance.
Second aspect of the present invention provides a kind of preparation of full photo threshold device based on two-dimensional material saturated absorption
Method, comprising the following steps:
Two-dimensional material is coated on light guide surface, forms saturated absorbing body；
Image intensifer is provided, image intensifer is connect with absorber by optical fiber with full, is formed and is saturated based on two-dimensional material
The full photo threshold device of sink effect.
In an embodiment of the present invention, the method that two-dimensional material is coated on light guide surface is specifically unlimited, such as can adopt
Two-dimensional material is coated on light guide surface with the method for optical fiber optical tweezers or tear tape, these methods are the conventional selection of industry.
The preparation method for the full photo threshold device based on two-dimensional material saturated absorption that second aspect of the present invention provides
Simply, easy to operate.
Third aspect present invention provides a kind of application of full photo threshold device based on two-dimensional material saturated absorption,
The present invention is based on the full photo threshold devices of two-dimensional material saturated absorption to be used for all-optical signal processing.
In an embodiment of the present invention, full photo threshold device will be for that will carry out shaping wait enter the optical signal of photoreceiver.
In a preferred embodiment of the invention, all-optical signal processing is located at before the photodetector of photoreceiver.
The full photo threshold device of the present invention reduces interference of the ground noise for useful signal, plays improvement signal quality,
The signal-to-noise ratio effect for receiving optical signal is improved, the photoelectricity that finally light pulse signal Jing Guo full photo threshold shaping enters receiver is visited
Device is surveyed, electric signal is converted into and carries out reception judgement, improve the bit error rate performance of receiver.
Full photo threshold device provided by the invention, cardinal principle are realized using the saturated absorption of two-dimensional material
The full light shaping of signal acts on, it is therefore desirable to which rationally setting parameter makes incident light pulse work in saturated absorption region.
In an embodiment of the present invention, the full photo threshold device based on two-dimensional material saturated absorption is used for All-optical signal
The method of noise in light pulse signal is reduced in treatment process, comprising the following steps:
(1) the saturated absorption curve for drawing saturated absorbing body, obtains saturated absorption according to saturated absorption curve
The average threshold power and average saturation power of body；
(2) the average threshold power of saturated absorbing body is converted into peak threshold power with average saturation power and peak value is satisfied
And power；
(3) power amplification is carried out to the light pulse signal received using image intensifer, makes amplified light pulse signal
Peak power be greater than or equal to saturated absorbing body peak value saturation power；
(4) amplified light pulse signal is input in saturated absorbing body, being greater than or equal in light pulse signal is full
With the signal of the peak value saturation power of absorber is nearly transparent passes through, the signal quilt of peak threshold power is less than in light pulse signal
It is strong to absorb, to reduce the noise in light pulse signal.
In a preferred embodiment of the invention, in step (1), the saturated absorption effect of saturated absorbing body is measured by testing
Curve is answered, provides foundation for the power working region of optical signal.Saturated absorption curve experiments test process is such as in step (1)
Shown in Fig. 4.Fig. 4 is the saturated absorption curve test schematic diagram for the saturated absorbing body that an embodiment of the present invention provides.Figure
In, 7,9,11,13,14 and 18 represent communication single mode optical fiber.
As shown in figure 4, its test process are as follows: the pulsed light that pulse laser 6 issues is after the amplification of high power EDFA 8
It is sent into variable optical attenuator 10, the decaying size by adjusting tunable attenuator 10 is coated with two-dimentional material to adjust to input to
The optical power size of the saturated absorbing body SA of material, to test out saturated absorption curve, pulsed light passes through tunable light decay
The photo-coupler 12 by 1 × 2 is also needed after subtracting device 10, before inputing to saturated absorbing body, wherein the one of photo-coupler
Port, which is exported, is used as monitoring input optical power size to light power meter 15, another port inputs to saturated absorbing body 16,
The output end of saturated absorbing body 16 reconnects a light power meter 17 for monitoring Output optical power size.According to Output optical power
Size draws saturated absorption curve, and saturated absorption curve graph is as shown in Figure 5.Fig. 5 mentions for an embodiment of the present invention
The saturated absorption curve graph of confession.By saturated absorption curve it can be concluded that threshold point Pa,thWith saturation point Pa,sa。
In a preferred embodiment of the invention, in step (2), saturated absorption curve is tested out, has been needed pulse
The average light power of light is converted into peak optical powers, process are as follows: if the pulsewidth of pulse laser is W, pulse laser
Period is T, average light power Pa, then peak optical powers PpAre as follows:
Pp=Pa×T/W (1)
By formula (1) it can be concluded that the corresponding peak threshold power P of saturated absorption curvep,thWith peak value saturation power Pp,sa:
Pp,th=Pa,th×T/W (2)
Pp,sa=Pa,sa×T/W (3)
In a preferred embodiment of the invention, in step (3), saturated absorption curve and corresponding peak value have been obtained
Power needs pointedly to carry out power amplification, process to the light pulse signal that system receives with image intensifer are as follows: if
The optical signal pulsewidth that system receives is Ws, signal period Ts, to make peak power reach the peak of saturated absorption curve
It is worth saturation power Pp,sa, need to amplify light pulse signal with image intensifer EDFA, amplified average light power Pa,EDFA
It should meet:
Pa,EDFA≥Pp,sa×Ws/Ts (4)
Formula (4) is the necessary condition that can reach full photo threshold effect, and only the output power of image intensifer meets public
Formula (4), competence exertion go out ability of the saturated absorption as full photo threshold shaping.
The full photo threshold device based on two-dimensional material saturated absorption that third aspect present invention provides can be used for entirely
Optical signal prosessing improves the signal-to-noise ratio for receiving signal, improves signal quality, favorably to reduce the noise in optical signal
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 being arranged along optical propagation direction
Optical amplifier fiber and saturated absorbing body are connected between erbium doped optical fibre light amplifier and saturated absorbing body by single mode optical fiber, are satisfied
It include micro-nano fiber and the graphene for being coated on micro-nano fiber surface with absorber.
Embodiment 2
A kind of full photo threshold device based on two-dimensional material saturated absorption, partly leads including what is be arranged along optical propagation direction
Body image intensifer and saturated absorbing body are connected between semiconductor optical amplifier and saturated absorbing body by single mode optical fiber, and saturation is inhaled
Acceptor includes micro-nano fiber and the black phosphorus for being coated 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 being arranged along optical propagation direction
Optical amplifier fiber and saturated absorbing body are connected between erbium doped optical fibre light amplifier and saturated absorbing body by single mode optical fiber, are satisfied
It include semiconductor nanowires and the Bi for being coated on semiconductor nanowires surface with absorber2Te3。
Embodiment 4
A kind of full photo threshold device based on two-dimensional material saturated absorption, including the er-doped being arranged along optical propagation direction
Optical amplifier fiber and saturated absorbing body are connected between erbium doped optical fibre light amplifier and saturated absorbing body by single mode optical fiber, are satisfied
It include semiconductor nanowires and the molybdenum disulfide for being coated on semiconductor nanowires surface with absorber.
Embodiment 5
A kind of preparation method of the full photo threshold device based on two-dimensional material saturated absorption, comprising the following steps:
The surface that graphene is deposited to, is coated on by the method for optical fiber optical tweezers micro-nano fiber, forms saturated absorbing body；
Erbium doped optical fibre light amplifier is provided, erbium doped optical fibre light amplifier and the saturated absorbing body are connected by single mode optical fiber
It connects, forms the full photo threshold device based on two-dimensional material saturated absorption.
Embodiment 6
A kind of preparation method of the full photo threshold device based on two-dimensional material saturated absorption, comprising the following steps:
Graphene coated is formed into saturated absorbing body on the surface of semiconductor nanowires by the method for tear tape method；
Semiconductor optical amplifier is provided, semiconductor optical amplifier is connect with the saturated absorbing body by single mode optical fiber,
Wherein, semiconductor nanowires are connected by way of coupling with single mode optical fiber, are formed based on two-dimensional material saturated absorption
Full photo threshold device.
Effect example
Full photo threshold device made from embodiment 1 based on two-dimensional material saturated absorption is used for all-optical signal processing
Noise in light pulse signal is reduced in the process, and Fig. 6 is the full photo threshold device based on two-dimensional material saturated absorption for complete
The effect diagram that noise in light pulse signal is reduced during optical signal prosessing, as can be seen that light pulse signal warp in Fig. 6
After crossing amplification, light pulse signal enters saturated absorbing body, and the peak value saturation power in saturated absorbing body is attached in light pulse signal
Close pulse signal 20 is nearly transparent by saturated absorbing body, and the substrate near the peak threshold power in saturated absorbing body
Noise 21 is greatly inhibited.Therefore, the full photo threshold device provided by the invention based on two-dimensional material saturated absorption
Noise in light pulse signal can be reduced, the quality of signal is improved.
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 (9)
1. a kind of full photo threshold device based on two-dimensional material saturated absorption, which is characterized in that including along optical propagation direction
The image intensifer of setting and the saturated absorbing body being connect with the image intensifer, the saturated absorbing body include optical waveguide and
Be coated on the two-dimensional material of the light guide surface, light pulse signal be greater than through the amplified peak power of the image intensifer or
Equal to the peak value saturation power of the saturated absorbing body.
2. the full photo threshold device based on two-dimensional material saturated absorption as described in claim 1, which is characterized in that described
Two-dimensional material includes at least one of graphene, black phosphorus, topological insulator and transient metal sulfide.
3. the full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 2, which is characterized in that described
Topological insulator includes Bi2Te3、Bi2Se3And Sb2Te3At least one of, the transient metal sulfide includes molybdenum disulfide
At least one of with tungsten disulfide.
4. the full photo threshold device based on two-dimensional material saturated absorption as described in claim 1, which is characterized in that described
Optical waveguide is micro-nano fiber or nano wire.
5. the full photo threshold device based on two-dimensional material saturated absorption as described in claim 1, which is characterized in that described
Image intensifer is erbium doped optical fibre light amplifier or semiconductor optical amplifier.
6. the full photo threshold device based on two-dimensional material saturated absorption as described in claim 1, which is characterized in that described
Image intensifer is connect with the saturated absorbing body by optical fiber.
7. a kind of preparation method of the full photo threshold device based on two-dimensional material saturated absorption, which is characterized in that including with
Lower step:
Two-dimensional material is coated on to the surface of optical waveguide, forms saturated absorbing body；
Image intensifer is provided, the image intensifer is connect with the saturated absorbing body, is formed and is based on two-dimensional material saturated absorption
The full photo threshold device of effect, light pulse signal are greater than or equal to the saturation through the amplified peak power of the image intensifer
The peak value saturation power of absorber.
8. the preparation method of the full photo threshold device based on two-dimensional material saturated absorption as claimed in claim 7, special
Sign is, the two-dimensional material is coated on to the table of the optical waveguide using the method for optical fiber optical tweezers or the method for tear tape
Face.
9. the full photo threshold device as claimed in any one of claims 1 to 6 based on two-dimensional material saturated absorption is used for full light
The method of noise in light pulse signal is reduced in signal processing, comprising the following steps:
(1) the saturated absorption curve for drawing saturated absorbing body, obtains the saturation according to the saturated absorption curve
The average threshold power and average saturation power of absorber；
(2) the average threshold power of the saturated absorbing body and the average saturation power are converted into peak threshold power and peak
It is worth saturation power；
(3) power amplification is carried out to the light pulse signal received using image intensifer, makes the peak of amplified light pulse signal
It is worth the peak value saturation power that power is greater than or equal to the saturated absorbing body；
(4) amplified light pulse signal is input in the saturated absorbing body, being greater than in the light pulse signal or is waited
Pass through in the signal of the peak value saturation power of the saturated absorbing body is nearly transparent, peak threshold is less than in the light pulse signal
The signal of power is strongly absorbed, to reduce the noise in light pulse signal.
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| 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 |
| CN107727595B (en) * | 2017-11-27 | 2020-01-31 | 山东师范大学 | U-shaped optical fiber evanescent wave sensor based on gold nanoparticles/tungsten disulfide and preparation method thereof |
| 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 |
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