CN113315577B - Few-mode all-optical amplification method and system and few-mode optical fiber communication system - Google Patents
Few-mode all-optical amplification method and system and few-mode optical fiber communication system Download PDFInfo
- Publication number
- CN113315577B CN113315577B CN202110542613.8A CN202110542613A CN113315577B CN 113315577 B CN113315577 B CN 113315577B CN 202110542613 A CN202110542613 A CN 202110542613A CN 113315577 B CN113315577 B CN 113315577B
- Authority
- CN
- China
- Prior art keywords
- mode
- optical
- few
- signals
- optical signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B10/25—Arrangements specific to fibre transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Lasers (AREA)
- Optical Communication System (AREA)
Abstract
The invention relates to the field of optical fiber communication systems, and provides a few-mode all-optical amplification method and system and a few-mode optical fiber communication system. The method comprises the following steps: s1: transferring a signal carried by the spatial mode dimension of the optical signal to any dimension of the optical signal, which can load and transmit the signal, and outputting a single-mode optical signal; s2: inputting the single-mode optical signal output in the step S1 into a single-mode all-optical amplifier, and outputting the amplified single-mode optical signal; s3: and transferring the signals carried by the dimension capable of loading and transmitting the signals in each single-mode optical signal output by the step S2 to the spatial mode dimension. The single-mode all-optical amplifier is used for realizing the few-mode amplification, is suitable for all-optical amplification of any space mode which can be stably transmitted in the few-mode optical fiber, and effectively solves the problems that the number of modes supported by the existing few-mode erbium-doped optical fiber amplifier is small, the mode-related gain is difficult to control and the like.
Description
Technical Field
The invention relates to the field of optical fiber communication systems, in particular to a few-mode all-optical amplification method and system and a few-mode optical fiber communication system.
Background
With the popularization of intelligent devices, broadband services and cloud services, network traffic is increased explosively, the requirement on the transmission capacity of an optical fiber communication system is higher and higher, and the transmission capacity of a single-mode optical fiber communication system approaches the theoretical limit. The few-mode optical fiber communication system based on the mode division multiplexing technology can modulate signals on each spatial mode, so that the transmission capacity of the communication system is greatly improved. Therefore, few-mode optical fiber communication systems based on mode division multiplexing have gained extensive attention and research.
Due to the non-ideal characteristics of the optical fiber, the optical signal is gradually attenuated in the process of being transmitted in the optical fiber, and after the optical power is attenuated to a certain degree, the receiving end cannot receive the signal without error codes, so that after the optical signal is transmitted in the optical fiber for a certain distance, a relay amplifier is required to be used for signal amplification, and in order to reduce the system cost as much as possible, the relay amplifier is the best all-optical amplifier. The existing relay all-optical amplifier which can be used for a few-mode optical fiber communication system is mainly a few-mode erbium-doped optical fiber amplifier. Along with the increasing number of space modes capable of supporting transmission in the few-mode fiber, the difficulty in preparing the few-mode erbium-doped fiber is higher and higher, so that the difficulty and the cost of preparing the few-mode erbium-doped fiber amplifier are greatly improved. In addition, the mode field distributions of different spatial modes are different, and therefore the gains obtained in the few-mode erbium-doped fiber amplifier are different, resulting in that the mode-dependent gain of the few-mode erbium-doped fiber amplifier is difficult to control. It can be seen that the prior art has the defects of small number of supported modes and difficult mode-dependent gain control. Therefore, a few-mode all-optical amplification method, an amplification system and a communication system which can realize few-mode all-optical amplification and can not greatly improve the preparation difficulty and the cost due to the increase of the number of spatial modes are urgently needed. After decades of development, the technology of single-mode all-optical amplifiers has matured, and single-mode all-optical amplifiers such as single-mode erbium-doped fiber amplifiers and phase-sensitive amplifiers based on four-wave mixing effect have good results in the aspects of performance indexes, design and manufacturing cost and the like.
Chinese patent publication No. CN106411452B (published as 2017, 02, 15), discloses an optical communication system based on mixed mode multiplexing, and in particular, an optical communication method and apparatus based on mixed mode multiplexing, where the method includes the following steps: the optical signal modulation unit generates a single-wavelength fundamental mode modulation output optical signal under the modulation of the baseband data signal; then forming a mixed mode multiplexing optical signal; the mixed mode multiplexed optical signal is transmitted in a transmission medium to generate a mixed mode multiplexed output optical signal; the mixed mode multiplexing output optical signal forms a single wavelength channel or wavelength division multiplexing multi-channel fundamental mode output optical signal; wavelength division multiplexing multi-channel basic mode output optical signals form multi-channel single-wavelength channel basic mode output optical signals; and outputting the optical signals of the fundamental modes of the single wavelength channels through an optical signal demodulation unit, and outputting the transmitted data information. The invention fully utilizes the mode resources of free space or communication transmission few-mode optical fibers, can improve the mode utilization efficiency to the greatest extent, further increases the transmission capacity and the transmission performance of an optical communication system, but fails to solve the problem of gradual attenuation of optical signals in the process of transmission in the optical fibers.
Disclosure of Invention
The invention aims at overcoming the defects of small number of modes supported and difficult mode-dependent gain control in the prior art, and provides a few-mode all-optical amplification method, an amplification system and a communication system using a single-mode all-optical amplifier to achieve the aim.
A few-mode all-optical amplification method comprises the following steps:
step S1: transferring a signal carried by the spatial mode dimension of the optical signal to any dimension of the optical signal, which can load and transmit the signal, and outputting a single-mode optical signal;
step S2: inputting the single-mode optical signal output in the step S1 into a single-mode all-optical amplifier, and outputting the amplified single-mode optical signal;
and step S3: and transferring the signals carried by the dimension capable of loading and transmitting the signals in each single-mode optical signal output by the step S2 to the spatial mode dimension.
Preferably, in step S1, the spatial mode dimension of the optical signal corresponds to the transverse electromagnetic field distribution of the electromagnetic wave propagating along the axial direction of the optical fiber, and the single mode is the spatial mode with the lowest order; any dimension capable of loading and transmitting signals is a dimension except a spatial mode, and comprises wavelength, time domain and polarization.
Preferably, the single-mode all-optical amplifier in step S2 refers to any instrument or system capable of realizing all-optical amplification or regeneration of a single-mode optical signal, and includes an erbium-doped fiber amplifier, an all-optical amplification system based on stimulated raman scattering, and a phase-sensitive amplification system based on a four-wave mixing effect.
Preferably, in step S1, the specific steps are as follows:
step S1.1: wavelength conversion: the method comprises the steps that the four-wave mixing effect in the few-mode optical fiber is utilized to realize wavelength conversion, and signals carried on each spatial mode of optical signals are transferred to another independent wavelength, so that the signals on different spatial modes are transferred to different wavelengths;
step S1.2: mode conversion: the spatial mode of the optical signal at each wavelength is converted into a fundamental mode, and a wavelength division multiplexed single-mode optical signal is output.
Preferably, in step S2, the specific steps are as follows:
step S2.1: single-mode all-optical amplification: performing all-optical amplification on the wavelength division multiplexing single-mode optical signal output in the step S1 by using a single-mode erbium-doped optical fiber amplifier;
step S2.2: gain equalization: according to the loss difference of different spatial modes in the conversion process, the single-mode erbium-doped fiber amplifier needs to adjust the gains of optical signals with different wavelengths, so that the gains of each spatial mode are the same.
Preferably, in step S3, the specific steps are as follows:
step S3.1: mode conversion; converting optical signals at different wavelengths from a fundamental mode to different spatial modes;
step S3.2: wavelength conversion; the four-wave mixing effect in the few-mode optical fiber is utilized to realize wavelength conversion, and signals carried on different wavelengths of optical signals are transferred to different spatial modes of the same wavelength.
A few-mode all-optical amplification system comprises an input mode conversion module, a single-mode all-optical amplifier and an output mode conversion module; the output end of the input mode conversion module is connected with the input end of the single-mode all-optical amplifier, and the output end of the single-mode all-optical amplifier is connected with the deep input end of the output mode conversion module;
the working process of the few-mode all-optical amplification system is as follows:
a1, acquiring an optical signal through the input mode conversion module, and transferring a signal carried in an optical signal space mode to a plurality of wavelengths of the optical signal to acquire a wavelength division multiplexing single-mode optical signal;
a2, the input mode conversion module inputs the wavelength division multiplexing single-mode optical signal into the single-mode all-optical amplifier to obtain an amplified wavelength division multiplexing single-mode optical signal and transmits the amplified wavelength division multiplexing single-mode optical signal to the output mode conversion module;
and A3, the output mode conversion module transfers the signal carried by each wavelength of the wavelength division multiplexing single-mode optical signal to a corresponding spatial mode dimension.
As a preferred scheme, in the input mode conversion module, a four-wave mixing effect is utilized to perform wavelength conversion, all spatial modes are converted into a fundamental mode through mode conversion, and a wavelength division multiplexing single-mode optical signal is output;
the single-mode all-optical amplifier is a single-mode erbium-doped optical fiber amplifier, performs all-optical amplification on wavelength division multiplexing signals, and realizes the balance of space mode gain by controlling gains of different wavelengths;
in the output mode conversion module, optical signals on different wavelengths are converted from a basic mode to different spatial modes, and then signals carried on different wavelengths are transferred to the same wavelength through wavelength conversion.
A few-mode optical fiber communication system comprises a transmitter array, a mode division multiplexer, a few-mode optical fiber link provided with a few-mode all-optical amplification system, a mode division multiplexer and a receiver array which are connected in sequence; the transmitter array is provided with N transmitters, and the receiver array is provided with N receivers; n basic mode optical signals sent by a transmitter array are loaded on N space modes of a few-mode optical fiber through a mode division multiplexer and enter a few-mode optical fiber link for transmission; according to the loss of an optical signal in a few-mode optical fiber, a few-mode all-optical amplification system needs to be deployed every time a distance is transmitted; the receiving end converts N space modes transmitted in the few-mode optical fiber into N single-mode signals through a mode division demultiplexer, and then the signals are input into a receiver to realize demultiplexing and receiving of the signals.
Preferably, the optical signals output by the N transmitters are transferred to a spatial mode of the few-mode optical fiber by a mode division multiplexer.
Compared with the prior art, the invention has the beneficial effects that:
the single-mode all-optical amplifier is used for realizing the few-mode amplification, is suitable for all-optical amplification of any space mode which can be stably transmitted in the few-mode optical fiber, and effectively solves the problems that the number of modes supported by the existing few-mode erbium-doped optical fiber amplifier is small, the mode-related gain is difficult to control and the like.
Drawings
Fig. 1 is a schematic diagram of an exemplary communication system of a few-mode optical fiber communication system according to an embodiment of the present invention.
Fig. 2 is a schematic flow diagram of a few-mode all-optical amplification method according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a few-mode all-optical amplifying system according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Specifically, as shown in fig. 1 to 3, embodiments of an all-optical amplification method and system with few modes and a communication system with few modes according to the present invention are disclosed.
A few-mode all-optical amplification method comprises the following steps:
step S1: transferring a signal carried by the spatial mode dimension of the optical signal to any dimension of the optical signal, which can load and transmit the signal, and outputting a single-mode optical signal;
step S2: inputting the single-mode optical signal output in the step S1 into a single-mode all-optical amplifier, and outputting the amplified single-mode optical signal;
and step S3: and transferring the signals carried by the dimension capable of loading and transmitting the signals in each single-mode optical signal output by the step S2 to the spatial mode dimension.
Further, in step S1, the spatial mode dimension of the optical signal corresponds to the transverse electromagnetic field distribution of the electromagnetic wave propagating along the axial direction of the optical fiber, and the single mode is the spatial mode of the lowest order; any dimension capable of loading and transmitting signals is a dimension other than spatial modes, including but not limited to wavelength, time domain, polarization.
Further, the single-mode all-optical amplifier in step S2 refers to any instrument and system capable of achieving all-optical amplification or regeneration of a single-mode optical signal, including but not limited to an erbium-doped fiber amplifier, an all-optical amplification system based on stimulated raman scattering, and a phase-sensitive amplification system based on a four-wave mixing effect.
Further, in step S1, the step S1 of transferring the signal carried on the optical signal spatial mode to multiple wavelengths of the optical signal includes the following specific steps:
step S1.1: wavelength conversion: the method comprises the steps that the four-wave mixing effect in the few-mode optical fiber is utilized to realize wavelength conversion, and signals carried on each spatial mode of optical signals are transferred to another independent wavelength, so that the signals on different spatial modes are transferred to different wavelengths;
step S1.2: mode conversion: and converting the spatial mode of the optical signal on each wavelength into a fundamental mode, and outputting a wavelength division multiplexing single-mode optical signal.
Further, in step S2, the wavelength division multiplexing single-mode optical signal output in step S1 is input to a single-mode all-optical amplifier, and the amplified wavelength division multiplexing single-mode optical signal is output, which specifically includes the following steps:
step S2.1: single-mode all-optical amplification: performing all-optical amplification on the wavelength division multiplexing single-mode optical signal output in the step S1 by using a single-mode erbium-doped optical fiber amplifier;
step S2.2: gain equalization: according to the loss difference of different spatial modes in the conversion process, the single-mode erbium-doped fiber amplifier needs to adjust the gains of optical signals with different wavelengths, so that the gain of each spatial mode is the same for the few-mode all-optical amplification method, the amplification system and the communication system based on the single-mode all-optical amplifier provided by the invention.
Further, in step S3, a signal carried by each wavelength of the wavelength division multiplexing single-mode optical signal is transferred to a corresponding spatial mode dimension, and the specific steps are as follows:
step S3.1: mode conversion; converting optical signals at different wavelengths from a fundamental mode to different spatial modes;
step S3.2: wavelength conversion; the four-wave mixing effect in the few-mode optical fiber is utilized to realize wavelength conversion, and signals carried on different wavelengths of optical signals are transferred to different spatial modes of the same wavelength.
A few-mode all-optical amplification system comprises an input mode conversion module, a single-mode all-optical amplifier and an output mode conversion module; the output end of the input mode conversion module is connected with the input end of the single-mode all-optical amplifier, and the output end of the single-mode all-optical amplifier is connected with the deep input end of the output mode conversion module;
the working process of the few-mode all-optical amplification system is as follows:
a1, acquiring an optical signal through the input mode conversion module, and transferring a signal carried in an optical signal space mode to a plurality of wavelengths of the optical signal to acquire a wavelength division multiplexing single-mode optical signal;
a2, the input mode conversion module inputs the wavelength division multiplexing single-mode optical signal into the single-mode all-optical amplifier to obtain an amplified wavelength division multiplexing single-mode optical signal and transmits the amplified wavelength division multiplexing single-mode optical signal to the output mode conversion module;
and A3, the output mode conversion module transfers the signals carried by each wavelength of the wavelength division multiplexing single-mode optical signals to a corresponding spatial mode dimension.
Further, in the input mode conversion module, a four-wave mixing effect is utilized to perform wavelength conversion, signals carried in an optical signal spatial mode are transferred to a plurality of wavelengths of optical signals, all the spatial modes are converted into a fundamental mode through mode conversion, a wavelength division multiplexing single-mode optical signal is output, and conversion from a mode division multiplexing signal to a wavelength division multiplexing signal is realized;
the single-mode all-optical amplifier is a single-mode erbium-doped fiber amplifier, performs all-optical amplification on wavelength division multiplexing signals, and realizes the balance of space mode gain by controlling gains of different wavelengths;
in the output mode conversion module, optical signals on different wavelengths are converted from a basic mode to different space modes, and then signals carried on different wavelengths are transferred to the same wavelength through wavelength conversion, so that conversion from wavelength division multiplexing signals to mode division multiplexing signals is realized.
A few-mode optical fiber communication system comprises a transmitter array, a mode division multiplexer, a few-mode optical fiber link provided with a few-mode all-optical amplification system, a mode division multiplexer and a receiver array which are connected in sequence; the transmitter array is provided with N transmitters, and the receiver array is provided with N receivers; take the example of a typical few-mode fiber communication system as shown in fig. 1. N basic mode optical signals sent by the transmitter array are loaded to N spatial modes of the few-mode optical fiber through a mode division multiplexer and enter a few-mode optical fiber link for transmission. According to the loss of an optical signal in a few-mode optical fiber, a few-mode all-optical amplification system based on a single-mode all-optical amplifier needs to be deployed every transmission distance, and the specific structure is shown in fig. 3. Fig. 1 shows a typical few-mode optical fiber communication system based on the mode division multiplexing technology. The transmitting end comprises N transmitters, and optical signals output by each transmitter can be transferred to a space mode of the few-mode optical fiber through the mode division multiplexer, so that N space modes can be used for transmitting signals in a few-mode optical fiber link, and the transmission capacity of the few-mode optical fiber communication system is improved by N times compared with that of a single-mode optical fiber communication system. The receiving end converts N space modes transmitted in the few-mode optical fiber into N single-mode signals through a mode division demultiplexer, and then the signals are input into a receiver to realize demultiplexing and receiving of the signals.
To sum up, embodiments of the present invention provide a few-mode all-optical amplification method, a system, and a few-mode optical fiber communication system, where a single-mode all-optical amplifier is used to implement few-mode amplification, and is suitable for all-optical amplification of any spatial mode that can be stably transmitted in a few-mode optical fiber, and effectively solve the problems of a small number of modes supported by the current few-mode erbium-doped optical fiber amplifier, difficulty in controlling gain associated with the modes, and the like.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (7)
1. A few-mode all-optical amplification method is characterized in that: the method comprises the following steps:
step S1: transferring a signal carried by the spatial mode dimension of the optical signal to any dimension of the optical signal, which can load and transmit the signal, and outputting a single-mode optical signal; the method comprises the following specific steps:
step S1.1: wavelength conversion: the method comprises the steps that the four-wave mixing effect in the few-mode optical fiber is utilized to realize wavelength conversion, and signals carried on each spatial mode of optical signals are transferred to another independent wavelength, so that the signals on different spatial modes are transferred to different wavelengths;
step S1.2: mode conversion: converting the space mode of the optical signal on each wavelength into a fundamental mode, and outputting a wavelength division multiplexing single-mode optical signal;
step S2: inputting the single-mode optical signal output in the step S1 into a single-mode all-optical amplifier, and outputting the amplified single-mode optical signal; the method comprises the following specific steps:
step S2.1: single-mode all-optical amplification: performing all-optical amplification on the wavelength division multiplexing single-mode optical signal output in the step S1 by using a single-mode erbium-doped fiber amplifier;
step S2.2: gain equalization: according to the loss difference of different spatial modes in the conversion process, the single-mode erbium-doped fiber amplifier needs to adjust the gains of optical signals with different wavelengths, so that the gains of the spatial modes are the same;
and step S3: transferring the signals carried by each dimension capable of loading and transmitting the signals in the single-mode optical signals output by the step S2 to the spatial mode dimension; the method comprises the following specific steps:
step S3.1: mode conversion; converting optical signals at different wavelengths from a fundamental mode to different spatial modes;
step S3.2: wavelength conversion; the four-wave mixing effect in the few-mode optical fiber is utilized to realize wavelength conversion, and signals carried on different wavelengths of optical signals are transferred to different spatial modes of the same wavelength.
2. The few-mode all-optical amplification method according to claim 1, characterized in that: in the step S1, the spatial mode dimension of the optical signal corresponds to the transverse electromagnetic field distribution of the electromagnetic wave axially propagated along the optical fiber, and the single mode is the spatial mode with the lowest order; any dimension capable of loading and transmitting signals is a dimension except a spatial mode, and comprises wavelength, time domain and polarization.
3. The few-mode all-optical amplification method according to claim 1, characterized in that: the single-mode all-optical amplifier in the step S2 refers to any instrument and system capable of realizing all-optical amplification or regeneration of a single-mode optical signal, and includes an erbium-doped fiber amplifier, an all-optical amplification system based on stimulated raman scattering, and a phase-sensitive amplification system based on a four-wave mixing effect.
4. An all-optical few-mode amplification system using the all-optical few-mode amplification method according to any one of claims 1 to 3, characterized in that: the system comprises an input mode conversion module, a single-mode all-optical amplifier and an output mode conversion module; the output end of the single-mode all-optical amplifier is connected with the input end of the output mode conversion module;
the working process of the few-mode all-optical amplification system is as follows:
a1, acquiring an optical signal through the input mode conversion module, and transferring a signal carried in an optical signal space mode to a plurality of wavelengths of the optical signal to acquire a wavelength division multiplexing single-mode optical signal;
a2, the input mode conversion module inputs the wavelength division multiplexing single-mode optical signal into the single-mode all-optical amplifier to obtain an amplified wavelength division multiplexing single-mode optical signal and transmits the amplified wavelength division multiplexing single-mode optical signal to the output mode conversion module;
and A3, the output mode conversion module transfers the signal carried by each wavelength of the wavelength division multiplexing single-mode optical signal to a corresponding spatial mode dimension.
5. The few-mode all-optical amplification system of claim 4, wherein:
in the input mode conversion module, the four-wave mixing effect is utilized to carry out wavelength conversion, all spatial modes are converted into a fundamental mode through mode conversion, and a wavelength division multiplexing single-mode optical signal is output;
the single-mode all-optical amplifier is a single-mode erbium-doped fiber amplifier, performs all-optical amplification on wavelength division multiplexing signals, and realizes the balance of space mode gain by controlling gains of different wavelengths;
in the output mode conversion module, optical signals on different wavelengths are converted from a fundamental mode to different spatial modes, and then signals carried on different wavelengths are transferred to the same wavelength through wavelength conversion.
6. A few-mode optical fiber communication system using the few-mode all-optical amplification system of claim 4 or 5, characterized in that:
the communication system comprises a transmitter array, a mode division multiplexer, a few-mode optical fiber link provided with a few-mode all-optical amplification system, a mode division multiplexer and a receiver array which are connected in sequence; the transmitter array has N transmitters, and the receiver array has N receivers; n basic mode optical signals sent by a transmitter array are loaded to N spatial modes of a few-mode optical fiber through a mode division multiplexer and enter a few-mode optical fiber link for transmission; according to the loss of an optical signal in a few-mode optical fiber, a few-mode all-optical amplification system needs to be deployed every time a distance is transmitted; the receiving end converts N space modes transmitted in the few-mode optical fiber into N single-mode signals through a mode division demultiplexer, and then the signals are input into a receiver to realize demultiplexing and receiving of the signals.
7. The few-mode fiber optic communication system of claim 6, wherein: and the optical signals output by each of the N transmitters transfer the signals to a space mode of the few-mode optical fiber through the mode division multiplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110542613.8A CN113315577B (en) | 2021-05-18 | 2021-05-18 | Few-mode all-optical amplification method and system and few-mode optical fiber communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110542613.8A CN113315577B (en) | 2021-05-18 | 2021-05-18 | Few-mode all-optical amplification method and system and few-mode optical fiber communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113315577A CN113315577A (en) | 2021-08-27 |
| CN113315577B true CN113315577B (en) | 2022-11-01 |
Family
ID=77373557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110542613.8A Active CN113315577B (en) | 2021-05-18 | 2021-05-18 | Few-mode all-optical amplification method and system and few-mode optical fiber communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113315577B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115986537B (en) * | 2023-03-14 | 2023-08-22 | 武汉长进光子技术股份有限公司 | Fiber core pumping optical fiber amplifier based on Gaussian doped ring core few-mode optical fiber |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152099A (en) * | 2013-01-31 | 2013-06-12 | 华中科技大学 | Single-fiber bidirectional transmission system based on mode division multiplexing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2903185B1 (en) * | 2014-02-03 | 2016-12-21 | Alcatel Lucent | Optical amplification node for a Spatial Division Multiplexing optical network |
| JP6725996B2 (en) * | 2016-02-25 | 2020-07-22 | Kddi株式会社 | Optical communication system and optical receiver |
| CN106411452B (en) * | 2016-07-25 | 2019-02-01 | 暨南大学 | A kind of optical communication system based on mixed mode multiplexing |
| JP7064139B2 (en) * | 2018-07-12 | 2022-05-10 | 日本電信電話株式会社 | Optical amplification relay system |
| CN109802289A (en) * | 2019-03-11 | 2019-05-24 | 电子科技大学 | Mould erbium-doped fiber amplifier is lacked in a kind of low difference mode gain |
-
2021
- 2021-05-18 CN CN202110542613.8A patent/CN113315577B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103152099A (en) * | 2013-01-31 | 2013-06-12 | 华中科技大学 | Single-fiber bidirectional transmission system based on mode division multiplexing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113315577A (en) | 2021-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9917672B2 (en) | Wireless distributed antenna MIMO | |
| CN1081858C (en) | Optical communication system | |
| CN100375416C (en) | Radiation power balancer | |
| EP1829251B1 (en) | Optical transmission system including repeatered and unrepeatered segments | |
| EP2725729A1 (en) | Optical data transmission method and system | |
| Puttnam et al. | 1 Pb/s Transmission in a 125μm diameter 4-core MCF | |
| US11476635B2 (en) | Optically amplified repeater system and optical amplifier | |
| US20210296847A1 (en) | Light amplifying relay system | |
| CN111934761B (en) | Anti-atmospheric turbulence high-speed coherent laser communication device based on few-mode parallel frequency mixing | |
| CN113315577B (en) | Few-mode all-optical amplification method and system and few-mode optical fiber communication system | |
| US20030108351A1 (en) | Methods for ultra long-haul optical communications | |
| WO2001073979A1 (en) | Free-space optical wdm communication system | |
| KR100265792B1 (en) | Wavelength division multiplexed transmission system and method thereof | |
| US11683116B2 (en) | Light amplification device, light transmission system, and light amplification method | |
| WO2020056264A1 (en) | Bismuth doped fiber amplifier | |
| WO2009089303A1 (en) | Optical amplifier capable of amplifying optical signals that treverse separate transmission fibers | |
| CN204597214U (en) | A kind of mixing discrete highly nonlinear optical fiber amplifier based on two feedback arrangement | |
| CN106464381B (en) | Multi sectional optical communication link with remote optical pumping formula amplifier | |
| CN104821481A (en) | Mixed discrete-type high-nonlinearity optical fiber amplifier based on double-feedback structure | |
| Birk et al. | Field trial of end-to-end OC-768 transmission using 9 WDM channels over 1000km of installed fiber | |
| EP1170895B1 (en) | Optical transmission system with reduced raman effect depletion. | |
| KR101230590B1 (en) | Wavelength tunable optical transceiver | |
| EP1170888A1 (en) | Optical fiber raman amplifier gain equalisation | |
| WO2022122016A1 (en) | Optical amplification apparatus and mode division multiplexing system comprising optical amplification apparatus | |
| CN114339486B (en) | Time-frequency signal optical fiber network distribution and transmission method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |