CN111404604B - Intermediate infrared communication device - Google Patents
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- H—ELECTRICITY
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/0256—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by the material
- H01L31/0264—Inorganic materials
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/10—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors characterised by potential barriers, e.g. phototransistors
- H01L31/101—Devices sensitive to infrared, visible or ultraviolet radiation
- H01L31/102—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier
- H01L31/108—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier the potential barrier being of the Schottky type
- H01L31/1085—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier the potential barrier being of the Schottky type the devices being of the Metal-Semiconductor-Metal [MSM] Schottky barrier type
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Abstract
The invention discloses a mid-infrared communication device which is characterized by at least comprising a graphene fiber, a data sending control circuit and a data receiving control circuit, wherein the graphene fiber is connected with the data sending control circuit or the data receiving control circuit to transmit or receive mid-infrared light; the raw materials of the invention have wide sources and can be prepared in batches; the communication device based on the mid-infrared light is the first example, has stable data transmission and wide application prospect in the fields of digital communication and the like.
Description
Technical Field
The invention relates to the field of digital communication, in particular to a mid-infrared communication device.
Background
Digital communication is a leading-edge technology for data transmission using different light waves as media, and generally includes two parts, namely receiving and transmitting. The current communication technology mainly uses long-wave-band microwaves as media, and is rarely related to short-wave-band areas, mainly because of the limitation of the performance deficiency of the photoelectric sensor.
Light having a wavelength of 2 to 25 μm is called mid-infrared light, and due to its special wavelength distribution, if data transmission using mid-infrared light as a carrier can be realized, it will have a great influence in the frontier fields of molecular detection, health care, weather science, secret communication, etc.
Most of traditional mid-infrared light emitting sources are constructed by semiconductor devices, and the principle is that carriers are compounded under the action of an electric field to generate mid-infrared photons. This device has two major drawbacks: the first is low efficiency, and the second is that most semiconductor devices are transition metal materials with high brittleness, high price and high preparation cost.
Conventional mid-infrared light detectors can be divided into two categories: one is a semiconductor, which is relatively brittle and expensive; the other is a micro-nano scale layered material, such as graphene, transition metal oxide (sulfide) and the like, which is difficult to bear a considerable mechanical effect and has low efficiency. In addition, the conventional mid-infrared detector can only work at low temperature and gradually fails at high temperature.
Disclosure of Invention
The invention provides a mid-infrared communication device, which mainly takes graphene fiber as a mid-infrared photoelectric conversion material.
The invention aims to provide a mid-infrared communication device, which mainly uses graphene fibers as a mid-infrared electro-optic conversion material to realize high-efficiency signal transmission of a mid-infrared band. The graphene fiber converts input electric energy into joule heat through high-efficiency gray body radiation and radiates the joule heat in the form of mid-infrared light, and the wavelength distribution and the light-emitting frequency of radiation can be regulated and controlled through an electric field; the input electric field is gradually increased, the temperature of the surface of the fiber is gradually increased, the luminous intensity is enhanced, and the wavelength is blue-shifted to short wave. The distribution area of the light-emitting wavelength of the graphene fiber is 1-30 micrometers, and the light-emitting frequency can reach 10 MHz as fast as possible.
The invention also aims to provide a mid-infrared communication device which mainly uses graphene fiber as a mid-infrared photoelectric conversion material and is used for the macro-processing of a signal acquisition chip in the existing communication equipment.
Another objective of the present invention is to provide a mid-infrared communication device, which mainly uses graphene fiber as a mid-infrared photoelectric conversion material, solves the mechanical problem of a signal acquisition chip in a communication device, can bear a considerable mechanical effect, and has the advantages of capability of being woven, low cost, low density and high speed.
Another objective of the present invention is to provide a mid-infrared communication device, which mainly uses graphene fiber as a mid-infrared photoelectric conversion material, so as to solve the problem of applicability of a signal acquisition chip in a communication device. The detection wavelength range is 3-10 microns, the fastest detection frequency reaches 1 MHz, and the method is suitable for complex working environments, wherein the working air pressure environment is 0-1013mbar, and the working temperature environment is 30-400K.
The invention also aims to provide a mid-infrared communication device which mainly uses graphene fibers as a mid-infrared optical-electrical and electrical-optical bidirectional conversion material to realize half-duplex communication.
In order to achieve one of the above purposes, the following scheme is adopted in the application: the intermediate infrared communication device at least comprises a receiving end and a transmitting end, wherein the receiving end comprises a first graphene fiber and a data transmission control circuit; the transmitting end comprises a second graphene fiber and a data receiving control circuit; the carbon-oxygen ratio of the first graphene fiber and the second graphene fiber is more than 10;
the data transmission control circuit includes:
the conversion module is used for converting an input signal into a bias voltage of 0.1-3.6V/cm, wherein the bias voltage is applied to two ends of the second graphene fiber; the second graphene fiber emits mid-infrared light under a bias voltage of 0.1-3.6V/cm.
The data reception control circuit includes:
the acquisition module is used for acquiring a current signal flowing through the first graphene fiber, and the acquisition module inputs a dark current below 100mA to the first graphene fiber; the graphene fiber converts mid-infrared light into an electric signal under the excitation of dark current below 100 mA.
Further, the data receiving control circuit comprises a display for displaying the current signal. In some preferred embodiments, the current signal may be converted to the digital signal using a high-profile display.
Further, the data transmission control circuit includes an input module for inputting a signal, such as a voice input module. The conversion of voice signals and the like into electrical signals and the conversion of the electrical signals into bias signals suitable for infrared emission in graphene fibers in the range of 0.1-3.6V/cm are common technical means in the art and are not described in detail in the present application.
The graphene fiber is fixed between two metal electrodes, and the metal electrodes comprise gold, copper, silver and zinc electrodes.
The graphene fiber is prepared by wet spinning, and the carbon-oxygen ratio is more than 10.
Generally, the diameter of the graphene fiber is 0.1-1000 microns, and the length can be arbitrarily selected according to actual conditions.
The graphene fiber may take various forms including a solid cylinder, a hollow cylinder, a core-shell structure, a ribbon, and a spiral.
In some preferred embodiments, the electrical signal output by the receiving end can be used as an input signal of the transmitting end, thereby forming a repeater; the distance between two or more repeaters may be adjusted in the range of 0.1-100 cm.
As is well known in the art, the communication device further includes a power module, which can provide power for the mobile power module or the power access module (wire) to the communication device.
The invention also provides the following half-duplex communication equipment:
the device comprises a graphene fiber, a switch, a data transmission control circuit and a data receiving control circuit; the graphene fiber is connected with the data sending control circuit or the data receiving control circuit, and the connection relation is switched through the selector switch; the carbon-oxygen ratio of the graphene fiber is more than 10.
The data transmission control circuit includes:
the conversion module is used for converting an input signal into bias voltage of 0.1-3.6V/cm, wherein the bias voltage is applied to two ends of the graphene fiber; the graphene fiber emits mid-infrared light under the bias voltage of 0.1-3.6V/cm.
The data reception control circuit includes:
the acquisition module is used for acquiring a current signal flowing through the first graphene fiber, and the acquisition module inputs a dark current below 100mA to the graphene fiber; the graphene fiber converts mid-infrared light into an electric signal under the excitation of dark current below 100 mA.
The change-over switch is a relay.
The invention has the beneficial effects that: the preparation process is safe and controllable, the raw materials are wide in source, and batch preparation is potential. The communication device based on the mid-infrared light is the first example, has stable data transmission and wide application prospect in the fields of digital communication and the like.
Drawings
FIG. 1 is a schematic diagram of a receiving end apparatus;
FIG. 2 shows the response frequency of the receiving end;
fig. 3 is a receiving end graphene fiber-based woven fabric;
FIG. 4 shows the result of the water-washing resistance test of the receiving end;
FIG. 5 is a graph of the responsivity and response frequency of the receiving end to infrared light in different wavelengths;
FIG. 6 is a schematic diagram of infrared emission in graphene fibers;
fig. 7 is a schematic structural diagram (a) of a graphene fiber testing device and a schematic light-emitting frequency diagram (B) thereof;
fig. 8 is a wavelength distribution and a theoretical curve of the graphene fiber under different working voltages, wherein the input electric field magnitudes corresponding to the curve are 1.1, 2.53 and 3.53V/cm from bottom to top in sequence;
FIG. 9 is a schematic view (A) and a schematic view (B) of the communication device;
fig. 10 is a diagram of signal transmission from the left system to the right system. A-D are sequentially as follows: the method comprises the steps of inputting signals, graphene fiber output signals, denoised voltage signals and amplified voltage signals.
Detailed Description
The invention relates to a mid-infrared communication device, which comprises a receiving end and a transmitting end, wherein the receiving end and the transmitting end can work independently to realize signal receiving (embodiment 1-4) and transmitting ends (5-9); or, depending on each other, the signal may be collected by the receiving end and then transmitted by the transmitting end, thereby implementing the repeater function (embodiment 11).
The invention also relates to a half-duplex mid-infrared communication device (embodiment 12) comprising a receiving end and a transmitting end, wherein the receiving end and the transmitting end work independently but share a core component, namely graphene fiber.
Example 1
(1) The solid cylindrical fiber with the diameter of 20 microns is prepared by taking the dispersion liquid of the graphene oxide as a raw material (high-alkene technology) and using a wet spinning technology, and the carbon-oxygen ratio is 10.1 after the solid cylindrical fiber is thermally reduced at the high temperature of 2000 ℃ for 10 min.
(2) Fixing graphene fibers with the length of 1cm between copper electrodes to assemble a detector as shown in fig. 1, connecting a current acquisition module with the two electrodes, and inputting a dark current with the magnitude of 20mA to the graphene fibers through the two electrodes.
(3) Under the working pressure environment of 10mbar and the working temperature environment of 400K, the service wavelength is 3 microns, and the power is 5mW/cm2The intermediate infrared light irradiates the graphene fiber, and current signals are collected through the two electrodes. The current of the device produced a fast response with a rising edge of 100 nanoseconds, a falling edge of 2 microseconds, and a response time of 0.9 microseconds, as shown in fig. 2.
Example 2
(1) The solid cylindrical graphene fiber with the diameter of 32 microns is prepared by taking the dispersion liquid of the graphene oxide as a raw material (high-graphene technology) and using a wet spinning technology, and is thermally reduced at the high temperature of 2000 ℃ for 10min, so that the carbon-oxygen ratio is 11.
(2) The graphene fibers were woven into a woven fabric as shown in fig. 3.
(3) Arranging copper electrodes at two sides of the woven fabric, connecting a current acquisition module with the two electrodes at a distance of 3cm, and inputting a dark current of 13 mA.
(4) The working air pressure environment is 1013 mbar; the working temperature environment is 30K, the using wavelength is 5.5 microns, and the power is 7mW/cm2The intermediate infrared light irradiates the graphene fiber, and current signals are collected through the two electrodes. The current of the device produces a fast response with a rising edge of 130 nanoseconds, a falling edge of 3.3 microseconds, and a response time of 1.1 microseconds.
The woven fabric is washed for multiple times (a roller washing machine, 30 ℃, 800 revolutions and 15 minutes each time), and the test result shows that the original responsiveness is kept after 8 times of washing.
Example 3
(1) The solid cylindrical fiber with the diameter of 45 microns is prepared by taking the dispersion liquid of the graphene oxide as a raw material (high-alkene technology) and using a wet spinning technology, and the carbon-oxygen ratio is measured to be 10.4 after the solid cylindrical fiber is thermally reduced for 20min at the high temperature of 2000 ℃.
(2) Graphene fibers with the length of 10cm are fixed between copper electrodes, a current acquisition module is connected with the two electrodes, and a dark current with the magnitude of 3mA is input.
(3) The working air pressure environment is 1013 mbar; the working power is 9mW/cm under the environment of 400K working temperature2And the medium infrared light with the wavelength of 3 microns irradiates the graphene fiber, and current signals are collected through the two electrodes. The current of the device produces a fast response with a rising edge of 140 nanoseconds, a falling edge of 4.5 microseconds, and a response time of 1.3 microseconds.
Example 4
(1) The solid cylindrical fiber with the diameter of 150 microns is prepared by taking the dispersion liquid of the graphene oxide as a raw material (high-alkene technology) and using a wet spinning technology, and the carbon-oxygen ratio is measured to be 10.8 after the solid cylindrical fiber is thermally reduced for 30min at the high temperature of 2000 ℃.
(2) Graphene fibers with the length of 5cm are fixed between copper electrodes, a current acquisition module is connected with the two electrodes, and a dark current with the magnitude of 3mA is input.
(3) The working air pressure environment is 1013 mbar; under the working temperature environment of 400K, the respective use power is 9mW/cm2And the intermediate infrared light with the wavelength of 3-10 microns irradiates the graphene fiber, and current signals are collected through the two electrodes. As shown in fig. 5, the response current varies with the wavelength.
Through the embodiments 1-5, it can be determined that the receiving end of the present application can at least achieve 0-1 data communication by collecting mid-infrared signals. Furthermore, a person skilled in the art can construct a current-optical signal simulation curve by analyzing the rising edge, the falling edge, the response time and the current magnitude of the output current signal, and realize high-precision communication by collecting mid-infrared signals.
Example 5
(1) The method comprises the steps of taking a dispersion liquid of graphene oxide as a raw material, preparing a ribbon-shaped graphene fiber with the diameter of 10 microns by using a wet spinning technology and a high-temperature thermal reduction technology, and controlling the carbon-oxygen ratio to be 10-11 by controlling the reduction time.
(2) The method comprises the steps of fixing graphene fibers with the length of 1cm between zinc electrodes to input bias voltage, inputting an electric field in an environment with the working air pressure of 10mbar and the working temperature of 400K, controlling the input voltage to be within the range of 0.1-3.6V/cm through a conversion module, and enabling the graphene fibers to emit mid-infrared light, wherein the schematic diagram of the mid-infrared emission of the graphene fibers is shown in FIG. 6. When the electric field intensity was 0.1V/cm, 0.3V/cm, 1V/cm, 2V/cm, 3V/cm, and 3.6V/cm, respectively, the surface temperature, the emission intensity, and the emission wavelength of the graphene fiber were changed, as shown in table 1. The variation of the light emission frequency is shown in fig. 7.
Table 1: surface temperature and light-emitting wavelength of graphene fiber under different electric field strengths
As can be seen from table 1, as the electric field intensity increases, the surface temperature of the graphene fiber increases, the emission intensity increases, and the emission wavelength shifts to a short-wave blue.
As can be seen from fig. 7, the light emission frequency of the graphene fiber is not affected by the magnitude of the electric field.
Fig. 8 is a wavelength distribution and a theoretical curve of the graphene fiber under different working voltages, and comparison with the theoretical curve of the gray body radiation proves that the working principle of infrared emission in the graphene fiber is gray body radiation, and the efficiency is high.
Example 6
(1) The preparation method comprises the steps of taking graphene oxide dispersion as a raw material, preparing solid cylindrical graphene fibers with the diameter of 30 micrometers by using a wet spinning technology and a high-temperature thermal reduction technology, and controlling the carbon-oxygen ratio to be 10-11 by controlling the reduction time.
(2) Fixing graphene fibers with the length of 2.5cm between copper electrodes, wherein the working air pressure environment is 1013 mbar; under the working temperature environment of 30K, an electric field with the strength of 1V/cm is input. Through tests, the surface temperature of the graphene fiber is about 330K, the mid-infrared light with the emission wavelength distribution of 1.8-12 microns is emitted, and the light emitting frequency is 10 MHz.
Example 7
(1) The preparation method comprises the steps of taking a dispersion liquid of graphene oxide as a raw material, preparing a core-shell structure graphene fiber with the diameter of 80 microns by using a wet spinning technology, and controlling the carbon-oxygen ratio to be 10-11 by controlling the reduction time.
(2) Fixing graphene fibers with the length of 5cm between silver electrodes, wherein the working air pressure environment is 1013 mbar; under the working temperature environment of 400K, an electric field with the strength of 2.5V/cm is input. Through tests, the surface temperature of the graphene fiber is about 580K, the mid-infrared light with the emission wavelength distribution of 1.6-12 microns is emitted, and the light emitting frequency is 10 MHz.
Example 8
(1) The method is characterized in that graphene oxide dispersion liquid is used as a raw material, a wet spinning technology and a high-temperature thermal reduction technology are used for preparing hollow cylindrical graphene fibers with the diameter of 100 micrometers, and the carbon-oxygen ratio is controlled to be 10-11 by controlling the reduction time.
(2) Fixing graphene fibers with the length of 8cm between zinc electrodes, wherein the working air pressure environment is 1013 mbar; under the working temperature environment of 400K, an electric field with the intensity of 3V/cm is input. Through tests, the surface temperature of the graphene fiber is about 630K, the mid-infrared light with the emission wavelength distribution of 1.5-12 microns is emitted, and the light emitting frequency is 10 MHz.
Example 9
(1) Taking the dispersion liquid of graphene oxide as a raw material, preparing a spiral graphene fiber with the diameter of 200 microns by using a wet spinning technology and a high-temperature thermal reduction technology, and controlling the carbon-oxygen ratio to be between 10 and 11 by controlling the reduction time.
(2) Fixing graphene fibers with the length of 10cm between copper electrodes, wherein the working air pressure environment is 1013 mbar; under the working temperature environment of 400K, an electric field with the size of 3.5V/cm is input. Through tests, the surface temperature of the graphene fiber is about 660K, the emitted wavelength distribution of the medium infrared light is 1.5-12 microns, and the light emitting frequency is 10 MHz.
By the embodiments 6 to 10, it can be determined that, with the graphene fiber as the emitting end of the core, the high-efficiency gray body radiation converts the input electric energy into joule heat and radiates out in the form of mid-infrared light, and the wavelength distribution and the light emitting frequency of the radiation can be regulated and controlled by an electric field; the input electric field is gradually increased, the temperature of the surface of the fiber is gradually increased, the luminous intensity is enhanced, and the wavelength is blue-shifted to short wave. The distribution area of the light-emitting wavelength of the graphene fiber is 1-30 micrometers, and the light-emitting frequency can reach 10 MHz as fast as possible.
Example 10
The detector assembled in example 1 and the transmitter assembled in example 5 were assembled in a module, and a communication device was obtained, which acquired signals through the detector and transmitted signals through the transmitter.
Therefore, the communication device which can work in a complicated environment can be obtained by assembling any one of the detectors of the embodiments 1 to 4 and any one of the transmitters of the embodiments 5 to 9.
Example 11
(1) The solid cylindrical fiber with the diameter of 20 microns is prepared by taking the dispersion liquid of the graphene oxide as a raw material (high-alkene technology) and using a wet spinning technology, and the carbon-oxygen ratio is 10.1 after the solid cylindrical fiber is thermally reduced at the high temperature of 2000 ℃ for 10 min.
(2) Fixing the graphene fiber with the length of 1cm between copper electrodes, connecting a current acquisition module with the two electrodes, and inputting a dark current with the magnitude of 20mA to the graphene fiber through the two electrodes so as to assemble a detector (receiving end).
(3) Graphene fibers with the length of 1cm are fixed between copper electrodes, and a conversion module is connected to the two electrodes to assemble a transmitter (transmitting end).
(4) The conversion module is connected with the current acquisition module, a power supply module is adopted to input voltage to the graphene fiber of the transmitting end, the conversion module converts the input voltage into a bias voltage signal within the range of 0.1-3.6V/cm according to the current signal, and the bias voltage is ensured to be in direct proportion to the current signal.
(5) Between the signal transmitting end and the signal terminal, a communication environment with an operating air pressure of 1013mbar and an operating temperature of 400K is constructed, and in the communication environment, 5 communication devices (repeaters) assembled by steps 1-4 are arranged. The signal transmitting end transmits a mid-infrared signal, and the signal receiving end is an indium gallium arsenic detector.
By the method, relay transmission in a complex environment can be realized.
Example 12
(1) The method comprises the steps of taking dispersion liquid of graphene oxide as a raw material, preparing hollow cylindrical graphene fibers with the diameter of 1 micron by using a wet spinning technology, carrying out high-temperature thermal reduction at 2000 ℃ for 10min, and measuring the carbon-oxygen ratio to be 11.3. Graphene fibers of 2cm length were fixed between two copper electrodes.
(2) Two sets of communication devices are constructed, each set of communication device comprises a graphene fiber, a selector switch (relay), a data sending control circuit and a data receiving control circuit, and the data sending control circuit and the data receiving control circuit are shown in fig. 9A and B; the graphene fiber is connected with the data sending control circuit or the data receiving control circuit, and the connection relation is switched through the selector switch.
The data transmission control circuit includes:
a conversion module (amplifier) for converting the input signal (input by DA) into a bias voltage of 0.1-3.6V/cm, the bias voltage being applied across the graphene fibers; the graphene fiber emits mid-infrared light under the bias voltage of 0.1-3.6V/cm.
The data reception control circuit includes:
the acquisition module is used for acquiring a current signal flowing through the first graphene fiber, and in the embodiment, the acquisition module comprises an AD module, and the acquisition module inputs a dark current below 100mA to the graphene fiber; the graphene fiber converts mid-infrared light into an electric signal under the excitation of dark current below 100mA, and the AD module converts the electric signal into a digital signal. The circuit includes an LCD display for displaying the digital signal.
The left and right sides of the graphene fiber are mutually parallel and symmetrical, and the distance is 5 cm.
The communication test is carried out under the environment that the working air pressure is 1013mbar and the working temperature is 400K.
The left system is switched to an emission mode, the graphene fiber is connected with the data transmission control circuit, the input signal is converted into a voltage signal through a DA, and the voltage of the voltage signal is further controlled to be below 7.2V through a conversion module, as shown in FIG. 10A. The graphene fibers of the left system emit mid-infrared light to the right system under bias excitation.
And the right system is switched to a receiving mode, and the graphene fiber is connected with a data receiving control circuit. The right side graphene fiber receives the mid-infrared light under the excitation of the dark current (80 mA) given by the acquisition module, and outputs an electric signal as shown in fig. 10B. The electrical signal is denoised (10C) by the acquisition module and amplified to obtain a voltage signal as shown in FIG. 10D.
Comparing fig. 10A and 10D, it can be seen that the input signal and the output signal have the same frequency. Accurate data communication can be realized through the communication equipment.
Similarly, the left system is switched to a receiving mode, the right system is switched to a transmitting mode, and signals input to the right system can be transmitted to the left system only, so that communication is realized.
Claims (9)
1. The intermediate infrared communication device is characterized by at least comprising a receiving end and a transmitting end, wherein the receiving end comprises a first graphene fiber and a data transmission control circuit; the transmitting end comprises a second graphene fiber and a data receiving control circuit; the carbon-oxygen ratio of the first graphene fiber and the second graphene fiber is more than 10;
the data transmission control circuit includes:
the conversion module is used for converting an input signal into a bias voltage of 0.1-3.6V/cm; the bias voltage is applied to two ends of the second graphene fiber; the second graphene fiber emits mid-infrared light under the bias voltage of 0.1-3.6V/cm;
the data reception control circuit includes:
the acquisition module is used for acquiring a current signal flowing through the first graphene fiber, and the acquisition module inputs a dark current below 100mA to the first graphene fiber; the graphene fiber converts mid-infrared light into an electric signal under the excitation of dark current below 100 mA.
2. The mid-infrared communication device as claimed in claim 1, wherein the data reception control circuit includes a display for displaying the current signal.
3. The mid-infrared communication device as claimed in claim 1, wherein the data transmission control circuit includes an input module for inputting a signal.
4. The mid-infrared communication device as claimed in claim 3, wherein the input module is a voice input module.
5. The mid-infrared communication device as recited in claim 1, wherein the first graphene fibers and the second graphene fibers are each fixed between two metal electrodes.
6. The mid-infrared communication device according to claim 1, wherein the graphene fibers are prepared by wet spinning.
7. The mid-infrared communication device according to claim 1, wherein the graphene fiber can assume various forms including solid cylinder, hollow cylinder, core-shell structure, ribbon, and spiral.
8. The intermediate infrared communication device is characterized by comprising a graphene fiber, a switch, a data transmission control circuit and a data receiving control circuit; the graphene fiber is connected with the data sending control circuit or the data receiving control circuit, and the connection relation is switched through the selector switch; the carbon-oxygen ratio of the graphene fiber is more than 10;
the data transmission control circuit includes:
the conversion module is used for converting an input signal into a bias voltage of 0.1-3.6V/cm; the bias voltage is applied to two ends of the graphene fiber; the graphene fiber emits mid-infrared light under the bias voltage of 0.1-3.6V/cm;
the data reception control circuit includes:
the acquisition module is used for acquiring current signals flowing through the graphene fibers, and the acquisition module inputs dark current below 100mA to the graphene fibers; the graphene fiber converts mid-infrared light into an electric signal under the excitation of dark current below 100 mA.
9. The mid-infrared communication device as claimed in claim 8, wherein the switch is a relay.
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