CN113014328A - All-optical regeneration device based on graphene material and pulse signal regeneration method - Google Patents
All-optical regeneration device based on graphene material and pulse signal regeneration method Download PDFInfo
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- CN113014328A CN113014328A CN202110208542.8A CN202110208542A CN113014328A CN 113014328 A CN113014328 A CN 113014328A CN 202110208542 A CN202110208542 A CN 202110208542A CN 113014328 A CN113014328 A CN 113014328A
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Abstract
The invention discloses an all-optical regeneration device and a pulse signal regeneration method based on a graphene material, wherein the all-optical regeneration device comprises a pulse signal source, an optical fiber amplifier, a photoelectric transmission medium made of the graphene material and a tunable band-pass filter; the input end of the optical fiber amplifier is connected with a pulse signal source through a single mode fiber, the output end of the optical fiber amplifier is connected with one surface of the photoelectric transmission medium through the single mode fiber, and the optical fiber amplifier is used for amplifying the power of the received ultrashort pulse laser signal and outputting a wide-amplitude amplified signal; the other surface of the photoelectric transmission medium is connected with the tunable band-pass filter through a single-mode optical fiber. The all-optical regeneration device regenerates the amplified ultrashort pulse laser signal based on the photoelectric transmission medium and filters the signal to obtain a regenerated pulse signal, the frequency of the output pulse signal is consistent with that of the initial pulse signal, external interference is avoided, the pulse signal can be amplified through an integral optical path, and low-loss and high-fidelity output is realized.
Description
Technical Field
The invention relates to the technical field of laser pulse regeneration, in particular to an all-optical regeneration device and a pulse signal regeneration method based on a graphene material.
Background
The laser pulse regeneration device is widely applied in the fields of medical detection, wireless signal transceiving and the like, and in order to improve the transmission distance of a laser pulse signal, the laser pulse signal can be amplified through the amplifier so as to be amplified into a high-power pulse signal to be output, however, the traditional amplifier easily influences the input initial signal in the process of amplifying the laser pulse signal, for example, background noise in the signal is increased, the wavelength of a pulse spectrum is shifted, and the processing quality of amplifying the laser pulse signal is not high. Therefore, the prior art method has the problem of low processing quality of amplifying the laser pulse signal.
Disclosure of Invention
The embodiment of the invention provides an all-optical regeneration device and a pulse signal regeneration method based on a graphene material, and aims to solve the problem of low processing quality of amplification processing on a laser pulse signal in the prior art.
In a first aspect, an embodiment of the present invention provides an all-optical regeneration device based on a graphene material, including; the device comprises a pulse signal source, an optical fiber amplifier, a photoelectric transmission medium and a tunable band-pass filter; the photoelectric transmission medium is made of a graphene material; the pulse signal source is used for outputting an ultrashort pulse laser signal; the input end of the optical fiber amplifier is connected with the pulse signal source through a single mode fiber, the output end of the optical fiber amplifier is connected with one surface of the photoelectric transmission medium through a single mode fiber, and the optical fiber amplifier is used for amplifying the power of the received ultrashort pulse laser signal and outputting a wide-amplitude amplified signal; the other surface of the photoelectric transmission medium is connected with the tunable band-pass filter through a single-mode optical fiber, and the photoelectric transmission medium is used for carrying out all-optical regeneration on the wide-amplitude amplified signal to obtain a regenerated pulse signal; the tunable band-pass filter is used for filtering the regenerative pulse signal to obtain a regenerative pulse signal.
The all-optical regeneration device based on the graphene material is characterized in that the photoelectric transmission medium is composed of a multilayer graphene film, wherein the number of layers of the graphene film is 2-10.
The all-optical regeneration device based on the graphene material is characterized in that a first optical fiber jumper head and a second optical fiber jumper head which are arranged on two sides of the photoelectric transmission medium are tightly connected through a flange plate; the end face of the single-mode optical fiber in the first optical fiber jumper head is tightly attached to one surface of the photoelectric transmission medium; and the end face of the single-mode optical fiber in the second optical fiber jumper head is tightly attached to the other face of the photoelectric transmission medium.
The all-optical regeneration device based on the graphene material is characterized in that the end faces of the single-mode optical fibers are smooth oblique-cut faces, and van der Waals force is generated between each smooth oblique-cut face and each of two side faces of the photoelectric transmission medium, so that the two faces of the photoelectric transmission medium are tightly attached to the end faces of the single-mode optical fibers.
The all-optical regeneration device based on the graphene material is characterized in that the pulse signal source is an optical fiber laser seed source.
The all-optical regeneration device based on the graphene material is characterized in that the central wavelength of a pulse spectrum of the optical fiber laser seed source is 1550nm, the pulse bandwidth is 1-3nm, and the corresponding time domain pulse width is 0.8-2 ps.
The all-optical regeneration device based on the graphene material is characterized in that the filtering wavelength of the tunable band-pass filter is 1540-1560 nm.
The all-optical regeneration device based on the graphene material is characterized in that the filtering bandwidth of the tunable band-pass filter is 1-1.4 times of the pulse bandwidth.
The all-optical regeneration device based on the graphene material is characterized in that the amplification factor of the optical fiber amplifier is 8-15 times.
On the other hand, an embodiment of the present invention further provides a pulse signal regeneration method, where the pulse signal regeneration method is applied to the above all-optical regeneration apparatus, and the method includes:
starting the pulse signal source, adjusting the pulse signal source to a short pulse output state and outputting an ultra-short pulse laser signal to the optical fiber amplifier;
the ultra-short pulse laser signal is subjected to broadening and amplification by the optical fiber amplifier and then a wide-amplitude amplification signal is output to the photoelectric transmission medium;
the photoelectric transmission medium carries out full spectrum regeneration on the wide-amplitude amplification signal to obtain a regeneration pulse signal and outputs the regeneration pulse signal to the tunable band-pass filter;
and adjusting the output width of the tunable band-pass filter to enable the tunable band-pass filter to output a regeneration pulse signal corresponding to the output width.
The embodiment of the invention provides an all-optical regeneration device and a pulse signal regeneration method based on a graphene material, wherein the all-optical regeneration device comprises a pulse signal source, an optical fiber amplifier, a photoelectric transmission medium and a tunable band-pass filter; the photoelectric transmission medium is made of a graphene material; the pulse signal source is used for outputting an ultrashort pulse laser signal; the input end of the optical fiber amplifier is connected with a pulse signal source through a single mode fiber, the output end of the optical fiber amplifier is connected with one surface of the photoelectric transmission medium through the single mode fiber, and the optical fiber amplifier is used for amplifying the power of the received ultrashort pulse laser signal and outputting a wide-amplitude amplified signal; the other surface of the photoelectric transmission medium is connected with the tunable band-pass filter through a single-mode fiber, and the photoelectric transmission medium is used for carrying out all-optical regeneration on the wide-amplitude amplified signal to obtain a regenerated pulse signal; the tunable band-pass filter is used for filtering the regeneration pulse signal to obtain the regeneration pulse signal. According to the all-optical regeneration device based on the graphene material, the amplified ultrashort pulse laser signals are regenerated based on the photoelectric transmission medium and filtered to obtain regenerated pulse signals, the frequency of the output pulse signals is consistent with that of the initial pulse signals, external interference is avoided, the pulse signals can be amplified through an integral optical path, and low-loss and high-fidelity output is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic overall structural diagram of an all-optical regeneration device based on a graphene material according to an embodiment of the present invention;
fig. 2 is a partial structural view of an all-optical regeneration device based on a graphene material according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a method for regenerating a pulse signal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In the present embodiment, please refer to fig. 1 to 2, fig. 1 is a schematic view of an overall structure of an all-optical regeneration device based on a graphene material according to an embodiment of the present invention; fig. 2 is a partial structural view of an all-optical regeneration device based on a graphene material according to an embodiment of the present invention. As shown in the figure, an embodiment of the present invention provides an all-optical regeneration apparatus based on a graphene material, including; the system comprises a pulse signal source 1, an optical fiber amplifier 2, a photoelectric transmission medium 3 and a tunable band-pass filter 4; the photoelectric transmission medium is made of a graphene material; the pulse signal source 1 is used for outputting an ultrashort pulse laser signal; the input end of the optical fiber amplifier 2 is connected with the pulse signal source 1 through a single mode fiber 5, the output end of the optical fiber amplifier is connected with one surface of the photoelectric transmission medium 3 through the single mode fiber 5, and the optical fiber amplifier 2 is used for amplifying the power of the received ultrashort pulse laser signal and outputting a wide-amplitude amplified signal; the other surface of the photoelectric transmission medium 3 is connected with the tunable band-pass filter 4 through a single-mode optical fiber 5, and the photoelectric transmission medium 3 is used for performing all-optical regeneration on the wide-amplitude amplified signal to obtain a regenerated pulse signal; the tunable band-pass filter 4 is configured to filter the regenerative pulse signal to obtain a regenerative pulse signal. Specifically, the single-mode fiber 5 may be connected to the pulse signal source 1, the input end of the fiber amplifier 2, the output end of the fiber amplifier 2, and the tunable bandpass filter 4 by fusion. The frequency of the regeneration pulse signal output by the tunable band-pass filter 4 is consistent with that of the ultrashort pulse laser signal, and the cost of the all-optical regeneration device can be reduced by adopting the optical transmission medium 3 as a nonlinear strengthening medium.
In a more specific embodiment, the photoelectric transmission medium 3 is composed of a multilayer graphene film, wherein the number of layers of the graphene film is 2 to 10. The number of layers of the graphene film can be set to be 2-10, in a more preferred embodiment, the number of layers of the graphene film can be 3-4, if the number of layers is too small, the nonlinear effect is weak, the effect cannot be implemented, if the number of layers is too large, the linear loss of a transmission path is increased too much, the signal-to-noise ratio of an input signal can be reduced, and even the transmission of an optical path is blocked, so that the number of layers of the graphene film is set to be 3-4, the nonlinear effect can be increased, and the signal-to-noise ratio of the input signal can be improved. Specifically, a first optical fiber jumper head 51 and a second optical fiber jumper head 52 arranged on two sides of the photoelectric transmission medium 3 are tightly connected through a flange 6; the end face of the single-mode optical fiber in the first optical fiber jumper head 51 is tightly attached to one surface of the photoelectric transmission medium 3; the end face of the single-mode optical fiber in the second optical fiber jumper head 52 is tightly attached to the other surface of the photoelectric transmission medium 3. The single-mode fiber end face is a smooth oblique plane, and the smooth oblique plane respectively generates van der waals force between two side faces of the photoelectric transmission medium 3, so that two faces of the photoelectric transmission medium 3 are tightly attached to the single-mode fiber end face. Van der Waals 'force is produced by contact between the graphene film and the end face of the single mode optical fiber, and the graphene film is attached to the end face of the single mode optical fiber and cannot fall off due to the Van der Waals' force. The end part of the single-mode optical fiber 5 can be beveled to form a smooth beveled surface, the photoelectric transmission medium 3 is tightly attached to the end surface of the single-mode optical fiber through Van der Waals force generated between the smooth beveled surface and any surface of the photoelectric transmission medium, and meanwhile, the flange plate is adopted to tightly connect the first optical fiber jumper head 51 and the second optical fiber jumper head 52 arranged on the two surfaces of the photoelectric transmission medium 3, so that the transmission loss of pulse signals can be reduced, the interference of the external environment in the process of regenerating the wide-amplitude amplified signals through the photoelectric transmission medium 3 is reduced, the regeneration loss of the wide-amplitude amplified signals can be reduced, and the quality of the regenerated pulse signals is improved.
The photoelectric transmission medium 3 is obtained by superposing a plurality of graphene films and can be prepared by a chemical vapor deposition method, the chemical vapor deposition is a chemical technology, the technology mainly utilizes one or more gas-phase compounds or simple substances containing film elements to carry out a chemical reaction on the surface of a substrate to generate a film, specifically, a nickel film can be obtained by the surface deposition of quartz glass by an electron beam evaporation method, and the nickel film is combined with the chemical vapor deposition method to carry out catalytic growth to obtain the large-area graphene film with higher quality. The graphene film prepared by the method has good crystallinity and continuity, and is easy to peel and transfer. In the process of transferring the prepared graphene film, the end face of the single-mode optical fiber can be bonded with the graphene film through van der waals force, the end face of the single-mode optical fiber in the first optical fiber jumper wire head 51 is bonded with one layer of graphene film, the end face of the single-mode optical fiber in the second optical fiber jumper wire head 52 is bonded with one layer of graphene film, two single-mode optical fibers 5 with the graphene films bonded on the end faces are respectively stretched into the two ends of the flange plate, the first optical fiber jumper wire head 51 and the second optical fiber jumper wire head 52 corresponding to the two single-mode optical fibers 5 are fixedly connected through the flange plate, and then the two sides of the photoelectric transmission medium 3 can be respectively connected with the single-mode optical fibers 5, and the obtained photoelectric transmission medium 3 is composed of two layers of graphene films; if the number of graphene thin films in the photoelectric transmission medium 3 needs to be increased, the number of graphene thin films to be bonded can be increased in two graphene thin films of the current photoelectric transmission medium 3, so that the number of graphene thin films in the photoelectric transmission medium 3 is increased to more than 2.
In a more specific embodiment, the pulse signal source 1 is a fiber laser seed source. The center wavelength of a pulse spectrum of the optical fiber laser seed source is 1550nm, the pulse bandwidth is 1-3nm, and the corresponding time domain pulse width is 0.8-2 ps. For example, the center wavelength of the pulse spectrum is 1550nm, the spectral width is 2nm, the pulse output power is 10mW, and the time domain pulse width is 0.8-2ps (picosecond), i.e. 800-.
In a more specific embodiment, the filtering wavelength of the tunable bandpass filter 4 is 1540-. Wherein the filtering bandwidth of the tunable band-pass filter 4 is 1-1.4 times of the pulse bandwidth. Specifically, the central wavelength of the filtering of the tunable bandpass filter 4 is 1550nm, and the adjustable range of the filtering wavelength is 1540-1560nm, that is, the central wavelength of the pulse deviates from 10nm upwards and downwards respectively as the adjustable range of the filtering wavelength, which facilitates the filtering of the filter and has sufficient nonlinearity for amplification and broadening. The typical filter bandwidth of the tunable band-pass filter 4 should be close to the bandwidth of the pulse spectrum center wavelength of the fiber laser seed source, in order to realize all-optical regeneration, the regenerated pulse bandwidth should be not less than the bandwidth of the input pulse, the filter is set to filter out noise of irrelevant wave bands in the optical path, and if the bandwidth is too large, the unnecessary noise cannot be filtered out, so the filter bandwidth can be set to be 1-1.4 times of the pulse bandwidth. For example, if the bandwidth of the center wavelength of the pulse spectrum is 3nm, a typical filter bandwidth of the tunable bandpass filter 4 can be set to 3-4.2 nm. The signal-to-noise ratio of the regenerative pulse signal output by the tunable band-pass filter 4 is not lower than 30 dB.
In a more specific embodiment, the amplification of the fiber amplifier 2 is 8-15 times. The optical fiber amplifier 2 is used for amplifying the power of the ultrashort pulse laser signal and simultaneously widening the wavelength of the ultrashort pulse laser signal, after the ultrashort pulse laser signal generated by the pulse signal source 1 is transmitted for a certain distance, the generated pulse signal with poor signal-to-noise ratio and reduced power is input to the optical fiber amplifier 2 for amplification, if the pulse output power of the ultrashort pulse laser signal output from the pulse signal source 1 is 10mW, after the pulse output power is amplified by the optical fiber amplifier 2, the wide-width amplified signal with the power of more than 100mW can be obtained and output to the photoelectric transmission medium 3, the ultra-short pulse laser signal is stretched in the process of amplifying the ultra-short pulse laser signal by the optical fiber amplifier 2, and the pulse spectral width of the wide-width amplified signal output by the optical fiber amplifier 2 is not less than 3nm of the wavelength of the ultra-short pulse laser signal.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for regenerating a pulse signal according to an embodiment of the invention. The embodiment of the present invention further provides a pulse signal regeneration method, wherein the pulse signal regeneration method is applied to the above all-optical regeneration apparatus, as shown in fig. 3, the method includes steps S110 to S140.
And S110, starting the pulse signal source, adjusting to a short pulse output state, and outputting an ultra-short pulse laser signal to the optical fiber amplifier.
And S120, broadening and amplifying the ultrashort pulse laser signal by the optical fiber amplifier, and outputting a wide amplification signal to the photoelectric transmission medium.
And S130, the photoelectric transmission medium performs full spectrum regeneration on the wide-amplitude amplification signal to obtain a regeneration pulse signal and outputs the regeneration pulse signal to the tunable band-pass filter.
S140, adjusting the output width of the tunable band-pass filter to enable the tunable band-pass filter to output a regeneration pulse signal corresponding to the output width.
The embodiment of the invention provides an all-optical regeneration device and a pulse signal regeneration method based on a graphene material, wherein the all-optical regeneration device comprises a pulse signal source, an optical fiber amplifier, a photoelectric transmission medium and a tunable band-pass filter; the photoelectric transmission medium is made of a graphene material; the pulse signal source is used for outputting an ultrashort pulse laser signal; the input end of the optical fiber amplifier is connected with a pulse signal source through a single mode fiber, the output end of the optical fiber amplifier is connected with one surface of the photoelectric transmission medium through the single mode fiber, and the optical fiber amplifier is used for amplifying the power of the received ultrashort pulse laser signal and outputting a wide-amplitude amplified signal; the other surface of the photoelectric transmission medium is connected with the tunable band-pass filter through a single-mode fiber, and the photoelectric transmission medium is used for carrying out all-optical regeneration on the wide-amplitude amplified signal to obtain a regenerated pulse signal; the tunable band-pass filter is used for filtering the regeneration pulse signal to obtain the regeneration pulse signal. According to the all-optical regeneration device based on the graphene material, the amplified ultrashort pulse laser signals are regenerated based on the photoelectric transmission medium and filtered to obtain regenerated pulse signals, the frequency of the output pulse signals is consistent with that of the initial pulse signals, external interference is avoided, the pulse signals can be amplified through an integral optical path, and low-loss and high-fidelity output is achieved.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An all-optical regeneration device based on graphene materials is characterized by comprising; the device comprises a pulse signal source, an optical fiber amplifier, a photoelectric transmission medium and a tunable band-pass filter; the photoelectric transmission medium is made of a graphene material;
the pulse signal source is used for outputting an ultrashort pulse laser signal;
the input end of the optical fiber amplifier is connected with the pulse signal source through a single mode fiber, the output end of the optical fiber amplifier is connected with one surface of the photoelectric transmission medium through a single mode fiber, and the optical fiber amplifier is used for amplifying the power of the received ultrashort pulse laser signal and outputting a wide-amplitude amplified signal;
the other surface of the photoelectric transmission medium is connected with the tunable band-pass filter through a single-mode optical fiber, and the photoelectric transmission medium is used for carrying out all-optical regeneration on the wide-amplitude amplified signal to obtain a regenerated pulse signal;
the tunable band-pass filter is used for filtering the regenerative pulse signal to obtain a regenerative pulse signal.
2. The all-optical regeneration device based on graphene materials according to claim 1, wherein the photoelectric transmission medium is composed of a multilayer graphene film, and the number of layers of the graphene film is 2-10.
3. The all-optical regeneration device based on graphene materials according to claim 2, wherein the first optical fiber jumper head and the second optical fiber jumper head arranged on both sides of the photoelectric transmission medium are tightly connected through a flange plate; the end face of the single-mode optical fiber in the first optical fiber jumper head is tightly attached to one surface of the photoelectric transmission medium; and the end face of the single-mode optical fiber in the second optical fiber jumper head is tightly attached to the other face of the photoelectric transmission medium.
4. The all-optical regeneration device based on graphene materials according to claim 3, wherein the end faces of the single-mode optical fibers are both smooth chamfered surfaces, and van der Waals forces are generated between the smooth chamfered surfaces and the two side faces of the photoelectric transmission medium, respectively, so that the two sides of the photoelectric transmission medium are tightly attached to the end faces of the single-mode optical fibers.
5. The all-optical graphene material-based regeneration device according to any one of claims 1 to 4, wherein the pulse signal source is a fiber laser seed source.
6. The all-optical regeneration device based on graphene materials according to claim 5, wherein the center wavelength of the pulse spectrum of the optical fiber laser seed source is 1550nm, the pulse bandwidth is 1-3nm, and the corresponding time domain pulse width is 0.8-2 ps.
7. The all-optical regeneration device based on graphene material as claimed in claim 6, wherein the filtering wavelength of the tunable band-pass filter is 1540-.
8. The all-optical graphene-material-based regeneration device according to claim 7, wherein the filtering bandwidth of the tunable band-pass filter is 1-1.4 times the pulse bandwidth.
9. The all-optical graphene-material-based regeneration device according to claim 1, wherein the amplification factor of the optical fiber amplifier is 8-15 times.
10. A pulse signal regeneration method applied to the all-optical regeneration apparatus according to any one of claims 1 to 9, the method comprising:
starting the pulse signal source, adjusting the pulse signal source to a short pulse output state and outputting an ultra-short pulse laser signal to the optical fiber amplifier;
the ultra-short pulse laser signal is subjected to broadening and amplification by the optical fiber amplifier and then a wide-amplitude amplification signal is output to the photoelectric transmission medium;
the photoelectric transmission medium carries out full spectrum regeneration on the wide-amplitude amplification signal to obtain a regeneration pulse signal and outputs the regeneration pulse signal to the tunable band-pass filter;
and adjusting the output width of the tunable band-pass filter to enable the tunable band-pass filter to output a regeneration pulse signal corresponding to the output width.
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