CN114389696A - Optical module, optical fiber interface connector, optical signal transmission method and system - Google Patents

Optical module, optical fiber interface connector, optical signal transmission method and system Download PDF

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Publication number
CN114389696A
CN114389696A CN202011141792.6A CN202011141792A CN114389696A CN 114389696 A CN114389696 A CN 114389696A CN 202011141792 A CN202011141792 A CN 202011141792A CN 114389696 A CN114389696 A CN 114389696A
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optical
optical signal
mode
optical fiber
division multiplexing
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CN202011141792.6A
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CN114389696B (en
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文玥
严晖
张文斗
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • 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
    • H04B10/40—Transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/04—Mode multiplex systems

Abstract

The application provides an optical module, an optical fiber interface connector, an optical signal transmission method and an optical signal transmission system, and relates to the technical field of communication. The optical fiber can transmit an N-order mode optical signal and an M-order mode optical signal on a first optical fiber, wherein N and M are integers which are larger than or equal to 0, N is different from M, and the N-order mode optical signal and the M-order mode optical signal have the same wavelength and opposite transmission directions. Therefore, two optical signals with the same wavelength are transmitted in different orders on the same optical fiber in different directions, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.

Description

Optical module, optical fiber interface connector, optical signal transmission method and system
Technical Field
The present application relates to the field of communications technologies, and in particular, to an optical module, an optical fiber interface connector, and an optical signal transmission method and system.
Background
With the wide application of the internet, the demand of people for data volume is increasing day by day, the traditional communication technology is difficult to meet the increasing demand of the current high-speed data volume, and the development of the optical communication technology just meets the demand. However, due to the influence of noise such as rayleigh scattering, and the like, and due to the lag of the research of Erbium-Doped Fiber Amplifier (EDFA), the current optical Fiber communication system mainly adopts single-Fiber unidirectional transmission, so that at least two optical fibers are required to be used for communication between two places, and the transmission cost is increased; in addition, since each optical fiber can only transmit in one direction, the utilization rate of optical fiber resources is also reduced. Therefore, the new transmission technology of single-fiber bidirectional transmission becomes the research focus and difficulty of the current optical transmission system.
Disclosure of Invention
The embodiment of the application provides an optical module, an optical fiber interface connector, an optical signal transmission method and an optical signal transmission system, which can transmit optical signals with the same wavelength in different directions of the same optical fiber, realize single-fiber bidirectional transmission, save engineering cost and improve the utilization rate of optical fiber resources.
In a first aspect, an embodiment of the present application provides an optical module, including:
an optical transmit module for providing a first fundamental mode optical signal to the mode division multiplexing module;
the optical fiber module comprises a mode division multiplexing component and a first optical fiber, wherein the mode division multiplexing component is used for sending N-order mode optical signals to the first optical fiber, N is an integer greater than or equal to 0, when N is greater than 0, the mode division multiplexing component is also used for converting the first basic mode optical signals into N-order mode optical signals, and when N is equal to 0, the N-order optical signals are the first basic mode optical signals;
the mode division multiplexing component is further used for receiving M-order mode optical signals from the first optical fiber, wherein M is an integer greater than or equal to 0, when M is greater than 0, the mode division multiplexing component is further used for converting the M-order mode optical signals into second basic mode optical signals, and when M is equal to 0, the M-order optical signals are the second basic mode optical signals;
a receiving optical component for receiving the second fundamental mode optical signal from the mode division multiplexing component;
wherein N is different from M, and the wavelengths of the N-order mode optical signal and the M-order mode optical signal are the same
Therefore, mode conversion is carried out on two optical signals which are transmitted in different directions on the same optical fiber and have the same wavelength through the mode division multiplexing component, so that the two optical signals can be transmitted on the same optical fiber in different-order modes, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In a possible implementation manner, the number of the mode division multiplexing components is multiple, each mode division multiplexing component is connected with one transmitting optical component and one receiving optical component, and each mode division multiplexing component corresponds to one optical fiber. Therefore, a plurality of optical fibers can be plugged into one optical module, and single-fiber bidirectional transmission can be realized on each optical fiber.
In a second aspect, embodiments of the present application provide a fiber optic interface connector, including:
the first end of the first optical fiber ferrule is connected with the mode division multiplexing component, the second end of the first optical fiber ferrule is used for being connected with the transmitting optical component, and the transmitting optical component is used for providing a first basic mode optical signal to the mode division multiplexing component through the first optical fiber ferrule;
the optical fiber module comprises a mode division multiplexing component and a first optical fiber, wherein the mode division multiplexing component is used for sending N-order mode optical signals to the first optical fiber, N is an integer greater than or equal to 0, when N is greater than 0, the mode division multiplexing component is also used for converting the first basic mode optical signals into N-order mode optical signals, and when N is equal to 0, the N-order optical signals are the first basic mode optical signals;
the mode division multiplexing component is further configured to receive an M-order mode optical signal from the first optical fiber, where M is an integer greater than or equal to 0, and when M is greater than 0, the mode division multiplexing component is further configured to convert the M-order mode optical signal into a second fundamental mode optical signal, where when M is 0, the M-order optical signal is the second fundamental mode optical signal;
and the first end of the second optical fiber ferrule is connected with the mode division multiplexing component, the second end of the second optical fiber ferrule is used for being connected with the receiving optical component, and the receiving optical component is used for receiving a second fundamental mode optical signal from the mode division multiplexing component through the second optical fiber ferrule.
Therefore, mode conversion is carried out on two optical signals which are transmitted in different directions on the same optical fiber and have the same wavelength through the mode division multiplexing component, so that the two optical signals can be transmitted on the same optical fiber in different-order modes, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In one possible implementation, the first optical fiber ferrule and the second optical fiber ferrule are both connected with the mode division multiplexing component through a waveguide chip or a jumper wire. Therefore, the connection between the optical fiber ferrule and the mode division multiplexing component is realized.
In a third aspect, an embodiment of the present application provides an electronic device, including the optical module provided in the first aspect, or including the optical fiber interface connector provided in the second aspect.
In a fourth aspect, an embodiment of the present application provides an optical signal transmission method, including:
and transmitting an N-order mode optical signal and an M-order mode optical signal on the first optical fiber, wherein N and M are integers which are greater than or equal to 0, N is different from M, and the N-order mode optical signal and the M-order mode optical signal have the same wavelength and opposite transmission directions. Therefore, two optical signals with the same wavelength are transmitted in different orders on the same optical fiber in different directions, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In one possible implementation form of the method,
transmitting an N-order mode optical signal and an M-order mode optical signal over a first optical fiber, comprising:
transmitting an N-order mode optical signal in a first direction of a first optical fiber;
an M-order mode optical signal is transmitted in a second direction of the first optical fiber. Thus, N-order mode optical signals are transmitted in the first direction, and M-order mode optical signals are transmitted in the second direction.
In one possible implementation, the first direction is a downlink direction and the second direction is an uplink direction.
In one possible implementation, the first direction is an uplink direction and the second direction is a downlink direction.
In a fifth aspect, an embodiment of the present application provides an optical signal transmission system, including: at least one optical fiber comprising a first optical fiber and at least two optical modules provided in the first aspect comprising a first optical module and a second optical module;
the first end of the first optical fiber is connected with one mode division multiplexing component in the first optical module, and the second end of the first optical fiber is connected with one mode division multiplexing component in the second optical module. Therefore, the optical signal transmission system can transmit two optical signals with the same wavelength in different orders in different directions on the same optical fiber, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In a sixth aspect, an embodiment of the present application provides an optical signal transmission system, including: at least one optical fiber comprising a first optical fiber and at least two of the fiber interface connectors provided in the second aspect comprising a first fiber interface connector and a second fiber interface connector;
the first end of the first optical fiber is connected with a mode division multiplexing component in the first optical fiber interface connector, and the second end of the first optical fiber is connected with a mode division multiplexing component in the second optical fiber interface connector. Therefore, the optical signal transmission system can transmit two optical signals with the same wavelength in different orders in different directions on the same optical fiber, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In a seventh aspect, an embodiment of the present application provides an optical signal transmission system, including: at least one optical fiber comprising a first optical fiber, at least one optical module provided in a first aspect comprising a first optical module, and at least one fiber optic interface connector provided in a second aspect comprising a first fiber optic interface connector;
the first end of the first optical fiber is connected with one mode division multiplexing component in the first optical module, and the second end of the first optical fiber is connected with the mode division multiplexing component of the first optical fiber interface connector. Therefore, the optical signal transmission system can transmit two optical signals with the same wavelength in different orders in different directions on the same optical fiber, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In an eighth aspect, an embodiment of the present application provides an optical module, including:
a mode division multiplexing component for transmitting a first optical signal on a first optical fiber and receiving a second optical signal;
an optical transmit module for providing a first optical signal to the mode division multiplexing module;
the receiving optical component is used for receiving a second optical signal sent by the mode division multiplexing component;
the first optical signal and the second optical signal have the same wavelength and are transmitted on the first optical fiber in different order modes;
the analog-to-digital multiplexing component is further configured to convert a transmission mode of the first optical signal before sending the first optical signal, and/or convert a transmission mode of the second optical signal after receiving the second optical signal.
Therefore, mode conversion is carried out on two optical signals with the same transmission wavelength in different directions on the same optical fiber through the mode division multiplexing component, so that the two optical signals can be transmitted on the same optical fiber in different-order modes, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In one possible implementation, the modulo division multiplexing component is further configured to:
converting a first optical signal received from the transmitting optical assembly from a zero-order mode to a first higher-order mode and transmitting;
and receiving a second optical signal sent in a second high-order mode, converting the second optical signal from the second high-order mode to a zero-order mode, and transmitting the second optical signal to the receiving optical component, wherein the first high-order mode is different from the second high-order mode. Thereby, transmission of the first optical signal and the second optical signal in different higher order modes is achieved.
In one possible implementation, the modulo division multiplexing component is further configured to:
transmitting a first optical signal received from an emitting optical component in a zeroth order mode;
and receiving a second optical signal sent in a third high-order mode, converting the second optical signal from the third high-order mode into a zero-order mode, and transmitting the zero-order mode to the receiving optical component. Therefore, the transmission of the optical signal of the basic mode in the signal uplink direction and the transmission of the optical signal of the high-order mode in the signal downlink direction are realized.
In one possible implementation, the modulo division multiplexing component is further configured to:
converting the first optical signal received from the transmitting optical assembly from the zero-order mode to a fourth higher-order mode and transmitting;
and receiving the second optical signal sent in the zero-order mode and transmitting the second optical signal to the receiving optical component. Therefore, the transmission of the high-order mode optical signal in the signal uplink direction and the transmission of the basic mode optical signal in the signal downlink direction are realized.
In a possible implementation manner, the number of the mode division multiplexing components is multiple, each mode division multiplexing component is connected with one transmitting optical component and one receiving optical component, and each mode division multiplexing component corresponds to one optical fiber. Therefore, a plurality of optical fibers can be plugged into one optical module, and single-fiber bidirectional transmission can be realized on each optical fiber.
In a ninth aspect, an embodiment of the present application provides a fiber optic interface connector, including:
a mode division multiplexing component for transmitting a first optical signal on a first optical fiber and receiving a second optical signal;
the first end of the first optical fiber ferrule is connected with the mode division multiplexing component, the second end of the first optical fiber ferrule is used for being connected with the transmitting optical component, and the transmitting optical component is used for providing a first optical signal to the mode division multiplexing component through the first optical fiber ferrule;
the first end of the second optical fiber ferrule is connected with the mode division multiplexing component, the second end of the second optical fiber ferrule is used for being connected with the receiving optical component, and the receiving optical component is used for receiving a second optical signal sent by the mode division multiplexing component through the second optical fiber ferrule;
the first optical signal and the second optical signal have the same wavelength and are transmitted on the first optical fiber in different order modes;
the analog-to-digital multiplexing component is further configured to convert a transmission mode of the first optical signal before sending the first optical signal, and/or convert a transmission mode of the second optical signal after receiving the second optical signal.
Therefore, mode conversion is carried out on two optical signals with the same transmission wavelength in different directions on the same optical fiber through the mode division multiplexing component, so that the two optical signals can be transmitted on the same optical fiber in different-order modes, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In one possible implementation, the modulo division multiplexing component is further configured to:
converting the first optical signal from a zero-order mode to a first high-order mode and transmitting the first optical signal;
and receiving a second optical signal sent in a second high-order mode, converting the second optical signal from the second high-order mode to a zero-order mode, and transmitting the second optical signal to the receiving optical assembly through the second optical fiber ferrule, wherein the first high-order mode is different from the second high-order mode. Thereby, transmission of the first optical signal and the second optical signal in different higher order modes is achieved.
In one possible implementation, the modulo division multiplexing component is further configured to:
transmitting the first optical signal in a zeroth order mode;
and receiving a second optical signal sent in a third high-order mode, converting the second optical signal from the third high-order mode into a zero-order mode, and transmitting the second optical signal to the receiving optical assembly through the second optical fiber ferrule. Therefore, the transmission of the optical signal of the basic mode in the signal uplink direction and the transmission of the optical signal of the high-order mode in the signal downlink direction are realized.
In one possible implementation, the modulo division multiplexing component is further configured to:
converting the first optical signal from a zero-order mode to a fourth high-order mode and transmitting the first optical signal;
and receiving a second optical signal sent in a zero-order mode, and transmitting the second optical signal to the receiving optical assembly through the second optical fiber ferrule. Therefore, the transmission of the high-order mode optical signal in the signal uplink direction and the transmission of the basic mode optical signal in the signal downlink direction are realized.
In one possible implementation, the first optical fiber ferrule and the second optical fiber ferrule are both connected with the mode division multiplexing component through a waveguide chip or a jumper wire. Therefore, the connection between the optical fiber ferrule and the mode division multiplexing component is realized.
In a tenth aspect, embodiments of the present application provide an electronic device, including the optical module provided in the eighth aspect, or including the fiber interface connector provided in the ninth aspect.
In an eleventh aspect, an embodiment of the present application provides an optical signal transmission method, including:
and transmitting a first optical signal and a second optical signal in different order modes on the first optical fiber, wherein the first optical signal and the second optical signal have the same wavelength and different transmission directions. Therefore, two optical signals with the same wavelength are transmitted in different directions on the same optical fiber, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In one possible implementation, transmitting a first optical signal and a second optical signal in different order modes over a first optical fiber includes:
transmitting a first optical signal in a first high order mode in a first direction of a first optical fiber;
transmitting a second optical signal in a second higher order mode in a second direction of the first optical fiber;
the first high-order mode is different from the second high-order mode. Thereby, transmission of the first optical signal and the second optical signal in different higher order modes is achieved.
In one possible implementation, transmitting a first optical signal and a second optical signal in different order modes over a first optical fiber includes:
transmitting a first optical signal in a zeroth order mode in a first direction of a first optical fiber;
the second optical signal is transmitted in a third, higher order mode in a second direction of the first optical fiber. Thereby, transmission of the fundamental mode optical signal in the first direction and transmission of the higher order mode optical signal in the second direction is achieved.
In one possible implementation, transmitting a first optical signal and a second optical signal in different order modes over a first optical fiber includes:
transmitting the first optical signal in a fourth higher order mode in a first direction of the first optical fiber;
the second optical signal is transmitted in a zeroth order mode in a second direction of the first optical fiber. Thereby, transmission of the high-order mode optical signal in the first direction and transmission of the fundamental mode optical signal in the second direction are achieved.
In one possible implementation, the first direction is a downlink direction and the second direction is an uplink direction.
In one possible implementation, the first direction is an uplink direction and the second direction is a downlink direction.
In a twelfth aspect, an embodiment of the present application provides an optical signal transmission system, including: at least one optical fiber and at least two of the optical modules provided in the eighth aspect, the at least one optical fiber comprising a first optical fiber, the at least two of the optical modules provided in the ninth aspect comprising a first optical module and a second optical module;
the first end of the first optical fiber is connected with one mode division multiplexing component in the first optical module, and the second end of the first optical fiber is connected with one mode division multiplexing component in the second optical module. Therefore, the optical signal transmission system can transmit two optical signals with the same wavelength in different orders in different directions on the same optical fiber, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In a thirteenth aspect, an embodiment of the present application provides an optical signal transmission system, including: at least one optical fiber comprising a first optical fiber and at least two of the fiber interface connectors provided in the ninth aspect, comprising a first fiber interface connector and a second fiber interface connector;
the first end of the first optical fiber is connected with a mode division multiplexing component in the first optical fiber interface connector, and the second end of the first optical fiber is connected with a mode division multiplexing component in the second optical fiber interface connector. Therefore, the optical signal transmission system can transmit two optical signals with the same wavelength in different orders in different directions on the same optical fiber, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In a fourteenth aspect, an embodiment of the present application provides an optical signal transmission system, including: at least one optical fiber, at least one optical module provided in an eighth aspect and at least one fiber optic interface connector provided in a ninth aspect, the at least one optical fiber comprising a first optical fiber, the at least one optical module provided in the first aspect comprising a first optical module, the at least one fiber optic interface connector provided in the second aspect comprising a first fiber optic interface connector;
the first end of the first optical fiber is connected with one mode division multiplexing component in the first optical module, and the second end of the first optical fiber is connected with the mode division multiplexing component of the first optical fiber interface connector. Therefore, the optical signal transmission system can transmit two optical signals with the same wavelength in different orders in different directions on the same optical fiber, single-fiber bidirectional transmission is achieved, engineering cost is saved, and the utilization rate of optical fiber resources is improved.
Drawings
Fig. 1 is a schematic structural diagram of an optical module provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another optical module provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another optical module provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a fiber optic interface connector according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of another optical signal transmission system provided in the embodiment of the present application;
fig. 12 is a schematic structural diagram of another optical signal transmission system provided in the embodiment of the present application;
fig. 13 is a schematic structural diagram of another optical signal transmission system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.
In the description of the embodiments of the present application, the words "exemplary," "for example," or "for instance" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary," "e.g.," or "e.g.," is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary," "e.g.," or "exemplary" is intended to present relevant concepts in a concrete fashion.
In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time. In addition, the term "plurality" means two or more unless otherwise specified. For example, the plurality of systems refers to two or more systems, and the plurality of terminals refers to two or more terminals.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
In general, when implementing single-fiber bidirectional transmission, two optical signals with different wavelengths are generally transmitted in different directions of the same optical fiber, for example, in the uplink direction at λ1Of optical signals of wavelength λ transmitted in the downstream direction2The optical signal of (1). However, in this way, the single-fiber bidirectional transmission needs to simultaneously carry two optical signals with different wavelengths, and therefore, a multiplexer/demultiplexer is needed to separate the two optical signals with different wavelengths at the transmitting and receiving ends of the optical signals, so as to input the wave of the optical signal to be transmitted to the multiplexer/demultiplexer to be transmitted into the optical fiber, and receive the wave of the optical signal output from the optical fiber. This makes it necessary to screen strictly for both wavelengths; in addition, lasers with corresponding wavelengths also need to be arranged, for example, 8-path transmission requires 4 paths for placing one wavelength, another 4 paths for placing the other wavelength, 8 paths for receiving also 4 paths are a group of wavelengths, and another 4 paths are another wavelength, and mounting of lasers with different wavelengths is required twice. Therefore, although the single-fiber bidirectional transmission method can realize single-fiber bidirectional transmission, the production process and the structural complexity of the corresponding optical module are greatly increased.
In addition, when single-fiber bidirectional transmission is implemented, two optical signals with the same wavelength are transmitted in different directions of the same optical fiber, in which a Polarization Beam Splitter (PBS) is used to convert a fundamental mode optical signal into a transverse magnetic mode (TM) optical signal and a transverse electric mode (TE) optical signal; then, the transverse magnetic mode optical signal is transmitted in one direction and the transverse electric mode optical signal is transmitted in the other direction of the same optical fiber. However, this method often causes damage to the optical signal, and generally needs to perform damage compensation and decision on the optical signal, for example, polarization mode dispersion compensation, frequency offset estimation, and the like.
In order to solve the problems, the scheme especially provides an optical module, an optical fiber interface connector, an optical signal transmission method and an optical signal transmission system, so that two optical signals with the same wavelength can be transmitted in different orders of modes in different directions of the same optical fiber, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved. These will be described in more detail below.
Fig. 1 is a schematic structural diagram of an optical module according to an embodiment of the present application. As shown in fig. 1, the optical module 100 includes a module division multiplexing module 11, an optical transmitting module 12, and an optical receiving module 13. Wherein, the emitting light component 12 and the receiving light component 13 are both connected with the module multiplexing component 11, for example, mounted or integrated. In this scheme, the mode division multiplexing component 11 may be a mode multiplexer/demultiplexer, and its function may be mainly mode multiplexing or demultiplexing, and sending an optical signal to the outside and/or receiving an optical signal sent from the outside, and the like, and it may specifically be a directional coupler, such as a multipath directional coupler based on an on-chip waveguide; the optical transmission module 12 may be a laser, and its function may be mainly to provide a fundamental mode optical signal to the module 11, so that the module 11 transmits an optical signal on an optical fiber; the receiving optical component 13 may be an optical receiver, and its function may be mainly to receive an externally transmitted optical signal transmitted by the module 11, that is, after the module 11 receives the externally transmitted optical signal, the module 11 may transmit the optical signal to the receiving optical component 13.
In this scheme, both the optical signal transmitted to the outside and the optical signal received from the outside by the mode division multiplexing component 11 are transmitted on the same optical fiber, and the two optical signals have the same wavelength and are transmitted in different order modes on the same optical fiber. For convenience of description and distinction, the optical signal transmitted from the module 11 to the outside is referred to as a first optical signal, and the optical signal received from the outside by the module 11 is referred to as a second optical signal. It is understood that in this embodiment, the mode division multiplexing component 11 may convert the transmission mode of the first optical signal before sending the first optical signal, for example, convert the fundamental mode optical signal provided by the optical transmitter component 12 into a higher-order mode optical signal, and/or may convert the transmission mode of the second optical signal after receiving the second optical signal, for example, convert the second optical signal transmitted in the higher-order mode into the fundamental mode optical signal, so that the first optical signal and the second optical signal can be transmitted in the same wavelength and different-order modes on the same optical fiber.
In this scheme, as a possible implementation manner, the mode division multiplexing component 11 may convert the first fundamental mode optical signal received from the optical transmission component 12 into a first higher-order mode optical signal and transmit the first higher-order mode optical signal to the optical fiber; and receives the second high-order mode optical signal from the optical fiber, converts the second high-order mode optical signal into a fundamental mode optical signal, and transmits the fundamental mode optical signal to the receiving optical module 13. The first high-order mode optical signal may have a different mode order from the second high-order mode optical signal, for example, the first high-order mode optical signal may have a mode order of 1 order, and the second high-order mode optical signal may have a mode order of 2 orders.
As another possible implementation, the mode division multiplexing component 11 can send the first fundamental mode optical signal received from the optical transmission component 12 directly onto an optical fiber; and receives the second high-order mode optical signal from the optical fiber, converts the second high-order mode optical signal into a fundamental mode optical signal, and transmits the fundamental mode optical signal to the receiving optical module 13.
As yet another possible implementation, the mode division multiplexing component 11 may convert the first fundamental mode optical signal received from the optical transmission component 12 into a first higher-order mode and transmit the first higher-order mode to the optical fiber; and receives the second fundamental mode optical signal from the optical fiber and transmits it to the receiving optical module 13.
That is, in this scheme, the optical transmitter module 12 may provide the first fundamental mode optical signal to the mode division multiplexing module 11. The mode division multiplexing component 11 may send an N-order mode optical signal to one optical fiber, where N is an integer greater than or equal to 0, and when N is greater than 0, the mode division multiplexing component may also convert the first fundamental mode optical signal into an N-order mode optical signal, where when N is equal to 0, the N-order optical signal is the first fundamental mode optical signal; and the mode division multiplexing component may receive an M-order mode optical signal from the same optical fiber, where M is an integer greater than or equal to 0, and when M is greater than 0, the mode division multiplexing component may also convert the M-order mode optical signal into a second fundamental mode optical signal, where when M is equal to 0, the M-order optical signal is the second fundamental mode optical signal, where N is different from M, and the wavelengths of the N-order mode optical signal and the M-order mode optical signal are the same. The receiving optical block 13 may receive the second fundamental mode optical signal from the mode division multiplexing block 11.
It is understood that in this embodiment, the mode division multiplexing component 11 can excite the fundamental mode optical signal to obtain the optical signal of the higher-order mode. Furthermore, an optical fiber interface may be disposed on the optical module 100, and the optical fiber interface may be connected to the module 11, so that when an optical fiber is inserted into the optical fiber interface, the module 11 can be connected to the optical fiber, thereby transmitting and/or receiving an optical signal on the optical fiber.
In one example, the mode division multiplexing component 11 may be based on a parallel-placed Long-Period Fiber Grating (LPFG) structure. The module 11 can convert the fundamental mode (LP) when the optical signal is converted01) The optical signal is coupled to the cladding mode through the grating; then coupled to the desired higher order mode (LP) via the tilted grating11) An optical signal, thereby enabling conversion from a fundamental mode optical signal to a higher order mode optical signal. In addition, the mode division multiplexing module 11 can also convert the high-order mode (LP)11) The optical signal is coupled to the cladding mode through the tilted grating; then coupled to the desired fundamental mode (LP) via the grating01) An optical signal, thereby enabling conversion from a higher order mode optical signal to a fundamental mode optical signal.
In one example, the module can be external to the optical module, and in this case, the optical module can include an optical transmitting module and an optical receiving module inside. Thus, the interiors of the optical module at the transmitting side and the optical module at the receiving side can be set to be the same structure, and the module division multiplexing component at the transmitting side and the module division multiplexing component at the receiving side can be distinguished; for example, the mode division multiplexing component on the transmitting side may transmit a first base mode optical signal provided by the optical transmitter component in the optical module on the transmitting side to the mode division multiplexing component on the receiving side, and may receive a second higher-order mode optical signal transmitted by the mode division multiplexing component on the receiving side, the second higher-order mode optical signal being obtained by converting the second base mode optical signal provided by the optical transmitter component in the optical module on the receiving side by the mode division multiplexing component on the receiving side. It is understood that the module multiplexing component is only external to the optical module, and the function of the module multiplexing component is consistent with the function described above. When the module division multiplexing component is externally arranged on the optical module, in the installation process, only the structure of the module division multiplexing component needs to be distinguished, and the structure of the optical module does not need to be distinguished, so that the assembly efficiency of the optical module is improved, and the fool-proofing effect can be effectively realized.
Next, another optical module provided in the embodiments of the present application is described.
Fig. 2 is a schematic structural diagram of another optical module provided in the embodiment of the present application. As shown in fig. 2, the optical module 200 includes a plurality of module division multiplexing modules 11, a plurality of transmitting optical modules 12, and a plurality of receiving optical modules 13. Each of the mode division multiplexing components 11 is connected with an emitting optical component 12 and a receiving optical component 13. It should be noted that each module 11 may be connected to an optical fiber, so as to enable the module 11 to transmit and/or receive optical signals on the optical fiber.
It can be understood that the operation principle, the process, and the like of the optical module 200 are the same as or similar to the operation principle, the process, and the like of the optical module 100, and reference may be specifically made to the description of the optical module 100, and thus, no further description is provided herein.
Next, still another optical module provided in the embodiments of the present application is described.
Fig. 3 is a schematic structural diagram of another optical module provided in the embodiment of the present application. As shown in fig. 3, the optical module 300 includes one module division multiplexing module 31, a plurality of transmitting optical modules 12, and a plurality of receiving optical modules 13. The module 31 has a plurality of communication channels, and each communication channel may correspond to one of the transmitting optical modules 12 and one of the receiving optical modules 13. In one example, the plurality of light emitting elements 12 are arranged in an array on one side of the module 31, and the plurality of light receiving elements 13 are arranged in an array on the other side of the module 31.
It can be understood that the operation principle, the process, and the like of the optical module 300 are the same as or similar to the operation principle, the process, and the like of the optical module 100, and reference may be specifically made to the description of the optical module 100, and thus, no further description is provided herein.
A fiber optic interface connector provided by embodiments of the present application is described next.
Fig. 4 is a schematic structural diagram of an optical fiber interface connector according to an embodiment of the present application. As shown in fig. 4, the fiber interface connector 400 includes a mode division multiplexing assembly 11, a first fiber stub 41 and a second fiber stub 42. Wherein, the module division multiplexing component 11 can transmit and/or receive optical signals on the optical fiber connected with the optical fiber connector 400; a first end of the first optical fiber ferrule 41 is connected to the mode division multiplexing component 11, a second end of the first optical fiber ferrule 41 can be used for connecting to an optical transmission component in an optical module or other modules, and the optical transmission component can provide a first fundamental mode optical signal to the mode division multiplexing component 11 through the first optical fiber ferrule 41; a first end of the second optical fiber ferrule 42 is connected to the mode division multiplexing component 11, a second end of the second optical fiber ferrule 41 can be used for being connected to a receiving optical component in an optical module or other modules, and the receiving optical component can receive an optical signal sent by the mode division multiplexing component 11 through the second optical fiber ferrule 42. In this scheme, the wavelength of the optical signal transmitted by the mode division multiplexing component 11 is the same as that of the received optical signal, and the optical signal is transmitted in different order modes on the same optical fiber. In addition, in the present embodiment, the mode division multiplexing component 11 may convert a transmission mode of the optical signal before transmitting the optical signal, for example, convert the optical signal to be transmitted from a zeroth order mode to a higher order mode, and/or may convert the transmission mode of the optical signal after receiving the optical signal, for example, convert a received second optical signal transmitted in the higher order mode to the zeroth order mode, so that the transmitted optical signal and the received optical signal can be transmitted in the same optical fiber in the same wavelength and different order modes. In one example, an optical signal transmitted in the zeroth order mode may be understood as a fundamental mode optical signal.
In this scheme, as a possible implementation manner, the mode division multiplexing component 11 may convert the first fundamental mode optical signal provided by the optical transmission component into a first high-order mode optical signal and transmit the first high-order mode optical signal to the optical fiber; and receiving the second high-order mode optical signal from the optical fiber, converting the second high-order mode optical signal into a fundamental mode optical signal, and transmitting the fundamental mode optical signal to the receiving optical module through the second optical fiber ferrule 42. The first high-order mode optical signal may have a different mode order from the second high-order mode optical signal, for example, the first high-order mode optical signal may have a mode order of 1 order, and the second high-order mode optical signal may have a mode order of 2 orders.
As another possible implementation, the mode division multiplexing component 11 may send the first fundamental mode optical signal directly onto the optical fiber; and receives the second high-order mode optical signal from the optical fiber, and converts the second high-order mode optical signal into a fundamental mode optical signal, which is then transmitted to the receiving optical module via the second optical fiber ferrule 42.
As another possible implementation manner, the mode division multiplexing component 11 may convert the first fundamental mode optical signal into a first higher-order mode optical signal and send the first higher-order mode optical signal to the optical fiber; and receives the second fundamental mode optical signal from the optical fiber and transmits the second fundamental mode optical signal to the receiving optical module through the second optical fiber ferrule 42. It is understood that in this embodiment, the mode division multiplexing component 11 can excite the fundamental mode optical signal to obtain a higher-order mode optical signal. In addition, the module division multiplexing component in this scheme is the same as or similar to the module division multiplexing component introduced in the optical module above, and may specifically refer to the description above.
In one example, the first fiber stub 41 and the second fiber stub 42 can each be connected to the mode division multiplexing component 11 via a waveguide chip or jumper wire.
Based on the optical module or the optical fiber interface connector in the above embodiments, an embodiment of the present application further provides an electronic device, where the electronic device includes any of the optical modules provided in the above embodiments, or includes the optical fiber interface connector provided in the above embodiments.
Next, an optical signal transmission method provided in an embodiment of the present application is described.
In this scheme, the optical signal transmission method mainly includes: and transmitting a first optical signal and a second optical signal in different order modes on the first optical fiber, wherein the first optical signal and the second optical signal have the same wavelength and different transmission directions. In other words, the method is to transmit two optical signals with the same wavelength but different transmission directions on the same optical fiber in different order modes. The transmission direction may include an uplink direction and a downlink direction. When transmitting the optical signal, the first optical signal may be transmitted in an uplink direction, and the second optical signal may be transmitted in a downlink direction; alternatively, the second optical signal may be transmitted in an uplink direction and the first optical signal may be transmitted in a downlink direction. In one example, the first optical signal may include a first fundamental mode optical signal or a first higher order mode optical signal, and the second optical signal may include a second fundamental mode optical signal or a second higher order mode optical signal.
In this scheme, as a possible implementation manner, a first high-order mode optical signal may be transmitted in a first direction of a first optical fiber; and transmitting a second higher order mode optical signal in a second direction of the first optical fiber. The first high-order mode optical signal has a different mode order from the second high-order mode optical signal, for example, the first high-order mode optical signal may have a mode order of 1, and the second high-order mode optical signal may have a mode order of 2.
As another possible implementation, a first fundamental mode optical signal may be transmitted in a first direction of a first optical fiber; and transmitting a second higher order mode optical signal in a second direction of the first optical fiber.
As yet another possible implementation, a first higher-order mode optical signal may be transmitted in a first direction of a first optical fiber; and transmitting a second fundamental mode optical signal in a second direction of the first optical fiber.
That is to say, the optical signal transmission method in the present scheme mainly includes: and transmitting an N-order mode optical signal and an M-order mode optical signal on the first optical fiber, wherein N and M are integers which are greater than or equal to 0, N is different from M, and the N-order mode optical signal and the M-order mode optical signal have the same wavelength and opposite transmission directions. In one example, an N-order mode optical signal may be transmitted in one direction (e.g., upstream or downstream) of the first optical fiber and an M-order mode optical signal may be transmitted in another direction (e.g., downstream or upstream) of the first optical fiber.
An optical signal transmission system provided by an embodiment of the present application is described next.
Fig. 5 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application. As shown in fig. 5, the optical signal transmission system may include: at least one optical fiber and at least two of the above-described optical modules. Wherein the at least one optical fiber may comprise an optical fiber 51 and the at least two optical modules described above may comprise an optical module 52 and an optical module 53. One end of the optical fiber 51 may be connected to one of the mod-mux assemblies 521 in the optical module 52, and the other end of the optical fiber 51 may be connected to one of the mod-mux assemblies 531 in the optical module 53.
In one example, as shown in fig. 6, the optical signal transmission system includes two optical modules, i.e., a transmitting-side optical module and a receiving-side optical module, in the figure, Tx and Tx 'denote transmitting optical components, and Rx' denote receiving optical components. Each optical module comprises 8 mode division multiplexing components, and each mode division multiplexing component is connected with a transmitting optical component, a receiving optical component and an optical fiber. Illustratively, the areas where Tx1 and Rx2, Tx3 and Rx4, Tx5 and Rx6, Tx7 and Rx8 are located in the transmit-side optical module, and the area opposite to the area in the receive-side optical module constitute a first transmission area; the areas where Tx2 and Rx1, Tx4 and Rx3, Tx6 and Rx5, and Tx8 and Rx7 are located in the transmit-side optical module, and the area opposite to the area in the receive-side optical module constitute a second transmission area. In the first transmission area, each uplink channel can transmit a fundamental mode optical signal, and each downlink channel can transmit a high-order mode optical signal; in the second transmission region, each uplink channel may transmit a high-order mode optical signal, and each downlink channel may transmit a fundamental mode optical signal.
In one example, as shown in fig. 7, the optical signal transmission system includes two optical modules of external mode division multiplexing components, i.e., a transmitting side optical module and a receiving side optical module in the figure. In the optical module, Tx and Tx 'denote transmitting optical components, and Rx' denote receiving optical components, respectively. Each external mode division multiplexing component is connected with an optical fiber, wherein each pair of light receiving and emitting components comprises a light emitting component and a light receiving component.
In one example, as shown in fig. 8, the optical signal transmission system includes an optical module with an external mode division multiplexing module (i.e., a transmitting side optical module) and an optical module with an internal mode division multiplexing module (i.e., a receiving side optical module), where Tx and Tx 'denote transmitting optical modules and Rx' denote receiving optical modules. The optical module comprises a transmitting side optical module, a receiving side optical module and a transmitting side optical module, wherein each pair of transmitting and receiving optical modules in the transmitting side optical module corresponds to one external mode division multiplexing module, each external mode division multiplexing module is connected with one optical fiber, and each pair of transmitting and receiving optical modules comprises one transmitting optical module and one receiving optical module.
In one example, as shown in fig. 9, the optical signal transmission system includes an optical module with a built-in mode division multiplexing module (i.e., a transmit-side optical module) and an optical module with an external mode division multiplexing module (i.e., a receive-side optical module), where Tx and Tx 'denote transmit optical modules and Rx' denote receive optical modules. The receiving side optical module comprises a receiving side optical module, a pair of receiving and transmitting optical modules and a plurality of optical fiber modules, wherein each pair of receiving and transmitting optical modules in the receiving side optical module corresponds to one external mode division multiplexing module, each external mode division multiplexing module is connected with one optical fiber, and each pair of receiving and transmitting optical modules comprises one transmitting optical module and one receiving optical module.
In one example, as shown in fig. 10, the optical signal transmission system includes two optical modules, each of which includes one module division multiplexing component, 8 transmitting optical components, and 8 receiving optical components, where Tx denotes the transmitting optical component, and Rx denotes the receiving optical component. In the optical signal transmission system, each of the mode division multiplexing modules has a plurality of communication channels, and each of the communication channels may correspond to one of the transmitting optical modules, one of the receiving optical modules, and one of the optical fibers.
It is understood that in this embodiment, one end of an optical fiber may be connected to one module multiplexing component (e.g., the module multiplexing component on the transmitting side), and the other end of the optical fiber may be connected to another module multiplexing component (e.g., the module multiplexing component on the receiving side).
For ease of understanding, the operation of the optical signal transmission system will be briefly described below by taking fig. 5 as an example.
In the optical signal transmission system, the mode division multiplexing component 521 in the optical module 52 can provide the wavelength λ of the emitted light component 5221Base mold (LP)01) Optical signal conversionIs a high order mode (LP)11) An optical signal. Then, the optical fiber 51 transmits the signal to the optical module 53. High order mode (LP)11) When the optical signal reaches the optical module 53, the optical signal first enters the module division multiplexing module 531; the mode division multiplexing component 531 then divides the higher order modes (LP)11) Conversion of optical signals into fundamental mode (LP)01) The optical signal is transmitted to the receiving optical component 533. And finally by the receiving optical component 533.
In addition, the mode division multiplexing component 531 in the optical module 53 can provide the wavelength of the emitted light component 532 as λ1Base mold (LP)01) The optical signal is transmitted to the optical module 52 through the optical fiber 51. Base mold (LP)01) When the optical signal reaches the optical module 52, the optical signal firstly enters the module division multiplexing component 521; the mode division multiplexing component 521 then couples the base mode (LP)01) The optical signal is transmitted to the receiving optical component 523. And finally received by the receiving optical component 523. Therefore, two optical signals with the same wavelength are transmitted in different directions in different order modes on the same optical fiber, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved.
Next, another optical signal transmission system provided in the embodiments of the present application will be described.
Fig. 11 is a schematic structural diagram of another optical signal transmission system according to an embodiment of the present application. As shown in fig. 11, the optical signal transmission system may include: at least one optical fiber and at least two of the above-described fiber interface connectors. Wherein the at least one optical fiber may comprise an optical fiber 61 and the at least two above-described fiber interface connectors may comprise a fiber interface connector 62 and a fiber interface connector 63. One end of the optical fiber 61 may be connected to a mode division multiplexing component 622 in the fiber interface connector 62 and the other end of the optical fiber 61 may be connected to a mode division multiplexing component 632 in the fiber interface connector 63.
It should be noted that, in the optical signal transmission system, the optical fiber ferrule in the optical fiber interface connector can be connected to an optical module having an optical transmitting module and an optical receiving module. Specifically, with continued reference to fig. 11, fiber stub 621 may be connected to an optical launch module 641 in optical module 64, and fiber stub 623 may be connected to an optical receive module 642 in optical module 64; the fiber stub 631 may be connected to the launch optical assembly 651 in the optical module 65, and the fiber stub 633 may be connected to the receive optical assembly 652 in the optical module 65.
In one example, as shown in fig. 12, this figure is a schematic connection diagram of a transmit-side fiber-interface connector and a receive-side fiber-interface connector. The mode division multiplexing component in the optical fiber interface connector at the sending side is positioned inside the optical fiber interface connector at the sending side, the optical fiber ferrule 91 can be connected with a transmitting optical component of an optical module, and the optical fiber ferrule 92 can be connected with a receiving optical component of an optical module; the mode division multiplexing component in the fiber interface connector at the receiving side is located inside the fiber interface connector at the receiving side, the fiber ferrule 93 can be connected with the transmitting optical component of another optical module, and the fiber ferrule 94 can be connected with the receiving optical component of another optical module. In addition, the mode division multiplexing component in the optical fiber interface connector at the transmitting side is connected with the mode division multiplexing component in the optical fiber interface connector at the receiving side through one optical fiber.
For ease of understanding, the operation of the optical signal transmission system will be briefly described with reference to fig. 11.
In the optical signal transmission system, the wavelength provided by the optical transmitting component 641 in the optical module 64 is λ1Base mold (LP)01) The optical signal enters the mode division multiplexing module 622 through the optical fiber ferrule 621 in the optical fiber interface connector 62. The mode division multiplexing component 622 can then divide the fundamental mode (LP)01) Conversion of optical signals into higher order modes (LP)11) An optical signal. The optical fiber 61 is then transmitted to the mode division multiplexing component 632 in the fiber interface connector 63. The mode division multiplexing component 632 divides the high order modes (LP)11) Conversion of optical signals into fundamental mode (LP)01) The optical signal is transmitted to the receiving optical assembly 652 in the optical module 65 through the optical fiber ferrule 633 in the optical fiber interface connector 63. And finally by the receiving optical component 652.
In addition, the wavelength of the emitted light component 651 provided in the optical module 65 is λ1Base mold (LP)01) The optical signal enters the mode division multiplexing module 632 through the optical fiber stub 631 in the optical fiber interface connector 63. The mode division multiplexing component 632 can then divide the fundamental mode (LP)01) The optical signal is transmitted to a mode division multiplexing component 622 in the fiber interface connector 62. Thereafter, the mode division multiplexing module 622 couples the fundamental mode (LP) through the fiber stub 62301) The optical signal is transmitted to the receiving optical component 642 in the optical module 64. And finally by the receiving optical component 642. Therefore, two optical signals with the same wavelength are transmitted in different directions in different order modes on the same optical fiber, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved.
Next, still another optical signal transmission system provided in the embodiments of the present application will be described.
Fig. 13 is a schematic structural diagram of another optical signal transmission system according to an embodiment of the present application. As shown in fig. 13, the optical signal transmission system may include: at least one optical fiber, at least one optical module as described above and at least one fiber interface connector as described above. Wherein the at least one optical fiber may comprise an optical fiber 71, the at least one optical module described above may comprise an optical module 72, and the at least one optical fiber interface connector described above may comprise an optical fiber interface connector 73. One end of the optical fiber 71 may be connected to one mode division multiplexing component 721 of the optical module 72, and the other end of the optical fiber 71 may be connected to a mode division multiplexing component 732 of the optical fiber interface connector 73.
It should be noted that, in the optical signal transmission system, the optical fiber ferrule in the optical fiber interface connector can be connected to an optical module having an optical transmitting module and an optical receiving module. Specifically, with continued reference to fig. 13, the fiber stub 731 can be connected to an optical launch component 741 in the optical module 74, and the fiber stub 733 can be connected to an optical receive component 742 in the optical module 74.
For ease of understanding, the operation of the optical signal transmission system will be briefly described with reference to fig. 13.
In the optical signal transmission system, a mode division multiplexing component 721 in the optical module 72 can provide the wavelength λ of the emitted optical component 7221Base mold (LP)01) Conversion of optical signals into higher order modes (LP)11) An optical signal. And then transmitted to the optical fiber interface connector 73 through the optical fiber 51. High order mode (LP)11) Light (es)When the signal reaches the optical fiber interface connector 73, the signal enters the module division multiplexing component 732; the mode division multiplexing component 732 then combines the higher order modes (LP)11) Conversion of optical signals into fundamental mode (LP)01) The optical signal is transmitted to the receiving optical module 742 in the optical module 74 through the optical fiber ferrule 733. And finally received by the receiving optical component 742.
In addition, the wavelength of the emitted light component 741 provided in the optical module 74 is λ1Base mold (LP)01) The optical signal enters the mode division multiplexing module 732 through the optical fiber stub 731 in the optical fiber interface connector 73. The mode division multiplexing component 732 may then divide the base mode (LP)01) The optical signal is transmitted to the optical module 72 through the optical fiber 71. Base mold (LP)01) When the optical signal arrives in the optical module 72, the optical signal first enters the module division multiplexing component 721. Then, the modulo division multiplexing component 721 combines the base modes (LP)01) The optical signal is transmitted to the receiving optical component 723. And finally received by the receiving optical component 723. Therefore, two optical signals with the same wavelength are transmitted in different directions in different order modes on the same optical fiber, single-fiber bidirectional transmission is realized, the engineering cost is saved, and the utilization rate of optical fiber resources is improved.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
It can be understood that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A light module, comprising:
an optical transmit module for providing a first fundamental mode optical signal to the mode division multiplexing module;
the mode division multiplexing component is configured to send an N-order mode optical signal to a first optical fiber, where N is an integer greater than or equal to 0, where when N is greater than 0, the mode division multiplexing component is further configured to convert the first fundamental mode optical signal into the N-order mode optical signal, and when N is equal to 0, the N-order optical signal is the first fundamental mode optical signal;
the mode division multiplexing component is further configured to receive an M-order mode optical signal from the first optical fiber, where M is an integer greater than or equal to 0, where when M is greater than 0, the mode division multiplexing component is further configured to convert the M-order mode optical signal into a second fundamental mode optical signal, and when M is 0, the M-order optical signal is the second fundamental mode optical signal;
a receiving optical component for receiving the second fundamental mode optical signal from the mode division multiplexing component;
and N is different from M, and the wavelengths of the N-order mode optical signal and the M-order mode optical signal are the same.
2. The optical module according to claim 1, wherein the plurality of the mode division multiplexing assemblies are connected to one of the transmitting optical assemblies and one of the receiving optical assemblies, and each of the mode division multiplexing assemblies corresponds to one optical fiber.
3. An optical fiber interface connector, comprising
The first end of the first optical fiber ferrule is connected with the mode division multiplexing component, the second end of the first optical fiber ferrule is used for being connected with the transmitting optical component, and the transmitting optical component is used for providing a first basic mode optical signal to the mode division multiplexing component through the first optical fiber ferrule;
the mode division multiplexing component is configured to send an N-order mode optical signal to a first optical fiber, where N is an integer greater than or equal to 0, where when N is greater than 0, the mode division multiplexing component is further configured to convert the first fundamental mode optical signal into the N-order mode optical signal, and when N is equal to 0, the N-order optical signal is the first fundamental mode optical signal;
the mode division multiplexing component is further configured to receive an M-order mode optical signal from the first optical fiber, where M is an integer greater than or equal to 0, where when M is greater than 0, the mode division multiplexing component is further configured to convert the M-order mode optical signal into a second fundamental mode optical signal, and when M is 0, the M-order optical signal is the second fundamental mode optical signal;
and a first end of the second optical fiber ferrule is connected with the mode division multiplexing component, a second end of the second optical fiber ferrule is used for being connected with a receiving optical component, and the receiving optical component is used for receiving the second fundamental mode optical signal from the mode division multiplexing component through the second optical fiber ferrule.
4. The fiber interface connector of claim 3, wherein the first fiber stub and the second fiber stub are each connected to the mode division multiplexing assembly by a waveguide chip or jumper wire.
5. An electronic device characterized by comprising a light module as claimed in claim 1 or 2, or comprising a fiber optic interface connector as claimed in claim 3 or 4.
6. An optical signal transmission method, comprising:
and transmitting an N-order mode optical signal and an M-order mode optical signal on a first optical fiber, wherein N and M are integers which are greater than or equal to 0, N is different from M, and the N-order mode optical signal and the M-order mode optical signal have the same wavelength and opposite transmission directions.
7. The method of claim 6, wherein transmitting the N-order mode optical signal and the M-order mode optical signal over the first optical fiber comprises:
transmitting the N-order mode optical signal in a first direction of the first optical fiber;
transmitting the M-order mode optical signal in a second direction of the first optical fiber.
8. The method of claim 7, wherein the first direction is a downlink direction and the second direction is an uplink direction.
9. The method of claim 7, wherein the first direction is an uplink direction and the second direction is a downlink direction.
10. An optical signal transmission system, comprising: at least one optical fiber comprising a first optical fiber and at least two optical modules according to claim 1 or 2 comprising a first optical module and a second optical module;
the first end of the first optical fiber is connected with one mode division multiplexing component in the first optical module, and the second end of the first optical fiber is connected with one mode division multiplexing component in the second optical module.
11. An optical signal transmission system, comprising: at least one optical fiber comprising a first optical fiber and at least two optical fiber interface connectors according to claims 3 or 4 comprising a first optical fiber interface connector and a second optical fiber interface connector;
wherein a first end of the first optical fiber is connected with a mode division multiplexing component in the first optical fiber interface connector, and a second end of the first optical fiber is connected with a mode division multiplexing component in the second optical fiber interface connector.
12. An optical signal transmission system, comprising: at least one optical fibre comprising a first optical fibre, at least one optical module as claimed in claim 1 or 2 comprising a first optical module, and at least one fibre-optic interface connector as claimed in claim 3 or 4 comprising a first fibre-optic interface connector;
the first end of the first optical fiber is connected with one mode division multiplexing component in the first optical module, and the second end of the first optical fiber is connected with the mode division multiplexing component of the first optical fiber interface connector.
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