Optical amplifier module and optical amplification system

Abstract

Provided in the present application are an optical amplifier module and an optical amplification system. The optical amplifier module comprises: a first circulator, an optical amplifier and a second circulator, wherein the optical amplifier is connected to each of the first circulator and the second circulator; the optical amplifier is used for performing light intensity amplification on first signal light input from the first circulator, so as to obtain second signal light, and outputting the second signal light to the second circulator; and the optical amplifier is further used for performing light intensity amplification on third signal light input from the second circulator, so as to obtain fourth signal light, and outputting the fourth signal light to the first circulator. On the basis of the technical solution, signal light transmitted in two directions can pass through the same optical amplifier, thereby greatly reducing the number of devices, thus reducing device costs and simplifying the system structure while achieving the uniform amplification of a two-way link.

Description

Optical amplifier module and optical amplification system

[0001] The present application claims priority to the Chinese patent application No. 202411246223.6, filed on September 5, 2024, and entitled "Optical amplifier module and optical amplification system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of optical communication, and in particular to an optical amplifier module and an optical amplification system. BACKGROUND

[0003] Optical fiber communication is a communication mode with light as a carrier and optical fiber as a transmission medium, which has the advantages of large transmission capacity, long relay distance, strong anti-electromagnetic interference ability and good security performance, and is one of the most important modes of modern communication. However, the fiber loss seriously limits the unrepeatered transmission distance in the optical fiber. In order to overcome the above-mentioned limitations, the existing technology uses a relay station to extend the communication distance of the optical fiber communication, but this way is high in energy consumption and is not conducive to the construction of a low-cost optical fiber communication network.

[0004] In recent years, optical fiber amplifiers such as erbium-doped fiber amplifiers (EDFA) can directly amplify optical signals in the optical domain. However, the EDFA optical amplifier can only be used as a unidirectional amplifier. For a bidirectional optical transmission system, an independent optical amplifier needs to be used for each optical transmission direction. This will result in a more complex structure of the bidirectional optical transmission system and greatly increase the cost of the device.

[0005] Therefore, the present application aims to provide an optical amplifier module, an optical amplification system and an optical fiber communication system, which can realize uniform amplification of bidirectional links, save device cost and simplify system structure. SUMMARY

[0006] The present application provides an optical amplifier module and an optical amplification system, which can realize uniform amplification of bidirectional links, save device cost and simplify system structure.

[0007] In a first aspect, an optical amplifier module is provided, comprising a first circulator, an optical amplifier and a second circulator, wherein the optical amplifier is connected with the first circulator and the second circulator respectively, the optical amplifier is configured to perform optical intensity amplification on a first signal light input from the first circulator to obtain a second signal light, and output the second signal light to the second circulator; the optical amplifier is further configured to perform optical intensity amplification on a third signal light input from the second circulator to obtain a fourth signal light, and output the fourth signal light to the first circulator.

[0008] In a possible implementation, the optical amplifier is a semiconductor optical amplifier.

[0009] In the present application, since the first circulator and the second circulator both have three optical ports and can function as optical isolators, by connecting the first circulator and the second circulator to the two ends of the optical amplifier respectively, the signal light transmitted in two directions can both pass through the same optical amplifier, thereby greatly reducing the number of devices, saving device cost and simplifying system structure while realizing uniform amplification of the bidirectional link. Further, since the circulator functions as an optical isolator, the system stability can be ensured.

[0010] With reference to the first aspect, in some implementations of the first aspect, the optical amplifier module further includes a first conversion module connected to the first circulator, and a second conversion module connected to the second circulator, the first conversion module is configured to combine N input signal lights into the first signal light and output to the first circulator; the second conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights and output; the second conversion module is further configured to combine M sixth signal lights input into the third signal light and output to the second circulator; the first conversion module is further configured to separate the fourth signal light input from the first circulator into N seventh signal lights and output; wherein N is an integer greater than or equal to 2.

[0011] With reference to the first aspect, in some implementations of the first aspect, the optical amplifier module further includes N first transceiver modules connected to the first conversion module, and M second transceiver modules connected to the second conversion module, wherein M is an integer greater than or equal to 2, each first transceiver module is configured to output one of the signal lights to the first conversion module; each second transceiver module is configured to receive one of the fifth signal lights input from the second conversion module; the each second transceiver module is further configured to output one of the sixth signal lights to the second conversion module; the each first transceiver module is further configured to receive one of the seventh signal lights input from the first conversion module.

[0012] With reference to the first aspect, in some implementations of the first aspect, the first circulator includes a first port, a second port and a third port, the second circulator includes a fourth port, a fifth port and a sixth port, the first port and the third port are connected to the first conversion module, the second port is connected to one end of the optical amplifier, the fourth port and the sixth port are connected to the second conversion module, and the fifth port is connected to the other end of the optical amplifier; wherein the first circulator receives the first signal light through the first port, the first circulator is further configured to output the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

[0013] With reference to the first aspect, in some implementations of the first aspect, the optical amplifier further includes: a third conversion module and a sixth conversion module connected with the first circulator, and a fourth conversion module and a fifth conversion module connected with the second circulator, the third conversion module is configured to combine the input N signal lights into the first signal light and output to the first circulator; the fourth conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights and output; the fifth conversion module is configured to combine the input M sixth signal lights into the third signal light and output to the second circulator; the sixth conversion module is configured to separate the fourth signal light input from the first circulator into N seventh signal lights and output; wherein N is an integer greater than or equal to 2.

[0014] With reference to the first aspect, in some implementations of the first aspect, the optical amplifier module further includes: N third transceiver modules connected with the third conversion module and the sixth conversion module, and M fourth transceiver modules connected with the fourth conversion module and the fifth conversion module, wherein M is an integer greater than or equal to 2, each third transceiver module is configured to output one of the signal lights to the third conversion module; each fourth transceiver module is configured to receive one of the fifth signal lights input from the fourth conversion module; the each fourth transceiver module is further configured to output one of the sixth signal lights to the fifth conversion module; the each third transceiver module is further configured to receive one of the seventh signal lights input from the sixth conversion module.

[0015] With reference to the first aspect, in some implementations of the first aspect, the first circulator includes a first port, a second port and a third port, the second circulator includes a fourth port, a fifth port and a sixth port, the first port is connected with the third conversion module, the second port is connected with one end of the optical amplifier, the third port is connected with the sixth conversion module, the fifth port is connected with the other end of the optical amplifier, the fourth port is connected with the fourth conversion module, and the sixth port is connected with the fifth conversion module; wherein the first circulator receives the first signal light through the first port, the first circulator is further configured to output the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

[0016] With reference to the first aspect, in some implementations of the first aspect, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are completely different; or the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are partially different.

[0017] With reference to the first aspect, in some implementations of the first aspect, the optical amplifier is a semiconductor optical amplifier. In the present application, the optical amplifier is a semiconductor optical amplifier which is not sensitive to the optical path, and thus the bidirectional input optical amplification can be guaranteed.

[0018] With reference to the first aspect, in some implementations of the first aspect, the first conversion module, the second conversion module, the third conversion module, the fourth conversion module, the fifth conversion module and the sixth conversion module are wavelength division multiplexing modules.

[0019] The second aspect provides an optical amplifier system, comprising a first circulator, an optical amplifier, a second circulator, a first conversion module and a second conversion module, wherein the optical amplifier is connected to the first circulator and the second circulator respectively, the first conversion module is connected to the first circulator, the second conversion module is connected to the second circulator, the first conversion module is configured to combine N input signal lights into a first signal light and output the first signal light to the first circulator; the optical amplifier is configured to amplify the optical intensity of the first signal light input from the first circulator to obtain a second signal light, and output the second signal light to the second circulator; the second conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights and output the M fifth signal lights; the second conversion module is further configured to combine M sixth signal lights into a third signal light and output the third signal light to the second circulator; the optical amplifier is further configured to amplify the optical intensity of the third signal light input from the second circulator to obtain a fourth signal light, and output the fourth signal light to the first circulator; the first conversion module is further configured to separate the fourth signal light input from the first circulator into N seventh signal lights and output the N seventh signal lights; wherein N is an integer greater than or equal to 2.

[0020] With reference to the second aspect, in some implementations of the second aspect, the first circulator comprises a first port, a second port and a third port, the second circulator comprises a fourth port, a fifth port and a sixth port, the first port and the third port are connected to the first conversion module, the second port is connected to one end of the optical amplifier, the fourth port and the sixth port are connected to the second conversion module, and the fifth port is connected to the other end of the optical amplifier; wherein the first circulator receives the first signal light through the first port, the first circulator is further configured to output the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

[0021] In conjunction with the second aspect, in some implementations of the second aspect, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights are completely different; or, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights are partially different.

[0022] In conjunction with the second aspect, in some implementations of the second aspect, the optical amplifier is a semiconductor optical amplifier.

[0023] In conjunction with the second aspect, in some implementations of the second aspect, the first transformation module and the second transformation module are wavelength division multiplexing modules.

[0024] Thirdly, an optical amplifier system is provided, including a first circulator, an optical amplifier, a second circulator, a third conversion module, a fourth conversion module, a fifth conversion module, and a sixth conversion module. The optical amplifier is connected to the first circulator and the second circulator, respectively. The third and sixth conversion modules are connected to the first circulator, and the fourth and fifth conversion modules are connected to the second circulator. The third conversion module is used to combine N input signal lights into a first signal light and output it to the first circulator. The optical amplifier is used to amplify the intensity of the first signal light input from the first circulator to obtain a second signal light. The first circulator receives a signal light and outputs the second signal light to the second circulator. The fourth conversion module separates the second signal light input from the second circulator into M fifth signal lights and outputs them. The fifth conversion module merges the M sixth signal lights into a third signal light and outputs it to the second circulator. The optical amplifier further amplifies the intensity of the third signal light input from the second circulator to obtain a fourth signal light and outputs it to the first circulator. The sixth conversion module separates the fourth signal light input from the first circulator into N seventh signal lights and outputs them; where N is an integer greater than or equal to 2.

[0025] In conjunction with the third aspect, in some implementations of the third aspect, the first circulator includes a first port, a second port, and a third port, and the second circulator includes a fourth port, a fifth port, and a sixth port. The first port is connected to the third conversion module, the second port is connected to one end of the optical amplifier, the third port is connected to the sixth conversion module, the fifth port is connected to the other end of the optical amplifier, the fourth port is connected to the fourth conversion module, and the sixth port is connected to the fifth conversion module. The first circulator receives the first signal light through the first port, and the first circulator is also used to output the fourth signal light through the third port. The second circulator outputs the second signal light through the fourth port, and the second circulator is also used to receive the third signal light through the sixth port.

[0026] With reference to the third aspect, in some implementations of the third aspect, the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights have completely different wavelengths; or the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights have partially different wavelengths.

[0027] With reference to the third aspect, in some implementations of the third aspect, the optical amplifier is a semiconductor optical amplifier.

[0028] With reference to the third aspect, in some implementations of the third aspect, the third conversion module, the fourth conversion module, the fifth conversion module, and the sixth conversion module are wavelength division multiplexing modules.

[0029] A fourth aspect provides an optical fiber communication system, comprising: a first circulator, an optical amplifier, a second circulator, a first conversion module, a second conversion module, N first transceiver modules, and M second transceiver modules, where N and M are integers greater than or equal to 2, where the optical amplifier is connected to the first circulator and the second circulator respectively, the first conversion module is connected to the first circulator and the N first transceiver modules respectively, and the second conversion module is connected to the second circulator and the N second transceiver modules respectively, the first conversion module is configured to combine N signal lights input from the N first transceiver modules respectively into a first signal light and output the first signal light to the first circulator; the optical amplifier is configured to perform optical intensity amplification on the first signal light input from the first circulator to obtain a second signal light, and output the second signal light to the second circulator; the second conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights, and output the M fifth signal lights to the N second transceiver modules respectively; the second conversion module is further configured to combine M sixth signal lights input from the N second transceiver modules into a third signal light and output the third signal light to the second circulator; the optical amplifier is further configured to perform optical intensity amplification on the third signal light input from the second circulator to obtain a fourth signal light, and output the fourth signal light to the first circulator; and the first conversion module is further configured to separate the fourth signal light input from the first circulator into N seventh signal lights, and output the N seventh signal lights to the N first transceiver modules respectively.

[0030] With reference to the fourth aspect, in some implementations of the fourth aspect, the first circulator includes a first port, a second port and a third port, the second circulator includes a fourth port, a fifth port and a sixth port, the first port and the third port are connected with the first conversion module, the second port is connected with one end of the optical amplifier, the fourth port and the sixth port are connected with the second conversion module, and the fifth port is connected with the other end of the optical amplifier; wherein the first circulator receives the first signal light through the first port, and the first circulator is further configured to output the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

[0031] With reference to the fourth aspect, in some implementations of the fourth aspect, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are completely different; or the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are partially different.

[0032] With reference to the fourth aspect, in some implementations of the fourth aspect, the optical amplifier is a semiconductor optical amplifier.

[0033] With reference to the fourth aspect, in some implementations of the fourth aspect, the first conversion module and the second conversion module are wavelength division multiplexing modules.

[0034] In a fifth aspect, an optical fiber communication system is provided, comprising: a first circulator, an optical amplifier, a second circulator, a third conversion module, a fourth conversion module, a fifth conversion module, a sixth conversion module, N third transceiver modules, and M fourth transceiver modules, where N and M are integers greater than or equal to 2, where the optical amplifier is connected to the first circulator and the second circulator respectively, the third conversion module and the sixth conversion module are connected to the first circulator and the N third transceiver modules respectively, the fourth conversion module and the fifth conversion module are connected to the second circulator and the N fourth transceiver modules respectively, the third conversion module is configured to combine signal light input from the N third transceiver modules into first signal light and output the first signal light to the first circulator; the optical amplifier is configured to amplify the first signal light input from the first circulator in optical intensity to obtain second signal light, and output the second signal light to the second circulator; the fourth conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights, and output the M fifth signal lights to the N fourth transceiver modules respectively; the fifth conversion module is configured to combine sixth signal light input from the N fourth transceiver modules into third signal light and output the third signal light to the second circulator; the optical amplifier is further configured to amplify the third signal light input from the second circulator in optical intensity to obtain fourth signal light, and output the fourth signal light to the first circulator; and the sixth conversion module is configured to separate the fourth signal light input from the first circulator into N seventh signal lights, and output the N seventh signal lights to the N third transceiver modules respectively.

[0035] In some implementations of the fifth aspect, in combination with the fifth aspect, the first circulator comprises a first port, a second port, and a third port, the second circulator comprises a fourth port, a fifth port, and a sixth port, the first port is connected to the third conversion module, the second port is connected to one end of the optical amplifier, the third port is connected to the sixth conversion module, the fifth port is connected to the other end of the optical amplifier, the fourth port is connected to the fourth conversion module, and the sixth port is connected to the fifth conversion module; wherein the first circulator receives the first signal light through the first port, the first circulator is further configured to output the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

[0036] In some implementations of the fifth aspect, in combination with the fifth aspect, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights are completely different; or the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights are partially different.

[0037] In some implementations of the fifth aspect, the optical amplifier is a semiconductor optical amplifier.

[0038] In some implementations of the fifth aspect, the third, fourth, fifth, and sixth transform modules are wavelength division multiplexing modules.

[0039] In a sixth aspect, an optical communication method is provided. The method includes: an optical amplifier optically amplifying a first signal light input from a first circulator to obtain a second signal light, and outputting the second signal light to a second circulator; the optical amplifier further optically amplifying a third signal light input from the second circulator to obtain a fourth signal light, and outputting the fourth signal light to the first circulator.

[0040] In some implementations of the sixth aspect, the method further includes: a first transform module combining N input signal lights into the first signal light and outputting to the first circulator; a second transform module separating the second signal light input from the second circulator into M fifth signal lights and outputting; the second transform module further combining M sixth signal lights input into the third signal light and outputting to the second circulator; the first transform module further separating the fourth signal light input from the first circulator into N seventh signal lights and outputting.

[0041] In some implementations of the sixth aspect, N is an integer greater than or equal to 2.

[0042] In some implementations of the sixth aspect, the method further includes: each first transceiver outputting one of the signal lights to the first transform module; each second transceiver receiving one of the fifth signal lights input from the second transform module; the each second transceiver further outputting one of the sixth signal lights to the second transform module; the each first transceiver further receiving one of the seventh signal lights input from the first transform module.

[0043] In some implementations of the sixth aspect, the method further includes: a third transform module combining N input signal lights into the first signal light and outputting to the first circulator; a fourth transform module separating the second signal light input from the second circulator into M fifth signal lights and outputting; a fifth transform module combining M sixth signal lights input into the third signal light and outputting to the second circulator; a sixth transform module separating the fourth signal light input from the first circulator into N seventh signal lights and outputting.

[0044] With reference to the sixth aspect, in some implementations of the sixth aspect, the method further comprises: each third transceiver module outputs one of the signal lights to the third conversion module; each fourth transceiver module receives one of the fifth signal lights input from the fourth conversion module; each fourth transceiver module further outputs one of the sixth signal lights to the fifth conversion module; and each third transceiver module further receives one of the seventh signal lights input from the sixth conversion module.

[0045] With reference to the sixth aspect, in some implementations of the sixth aspect, the first circulator receives the first signal light through the first port, the first circulator further outputs the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator further receives the third signal light through the sixth port.

[0046] With reference to the sixth aspect, in some implementations of the sixth aspect, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights are completely different; or the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights, and the N seventh signal lights are partially different.

[0047] The specific description and technical effects of the second aspect and the sixth aspect can refer to the specific description and technical effects of the first aspect described above. BRIEF DESCRIPTION OF DRAWINGS

[0048] FIG. 1 is a schematic diagram of an optical circulator.

[0049] FIG. 2 is a schematic structural diagram of an optical amplifier module 200 according to an embodiment of the present application.

[0050] FIG. 3 is a schematic structural diagram of an optical amplifier module 200 according to another embodiment of the present application.

[0051] FIG. 4 shows the connection relationship between the first conversion module, the first circulator, and the optical amplifier, and the connection relationship between the second conversion module, the second circulator, and the optical amplifier.

[0052] FIG. 5 is a schematic structural diagram of an optical amplifier module 200 according to another embodiment of the present application.

[0053] FIG. 6 is a schematic structural diagram of an optical amplifier module 200 according to another embodiment of the present application.

[0054] FIG. 7 shows the connection relationship between the third conversion module, the first circulator, the sixth conversion module, and the optical amplifier, and the connection relationship between the fourth conversion module, the fifth conversion module, the second circulator, and the optical amplifier.

[0055] Figure 8 is a schematic structural diagram of an optical amplifier module 200 according to another embodiment of the present application.

[0056] Figure 9 is a schematic flow chart of an optical communication method 900 according to an embodiment of the present application. DETAILED DESCRIPTION

[0057] The technical solutions of the present application will be described below with reference to the accompanying drawings.

[0058] The technical solutions of the embodiments of the present application can be applied in an optical fiber communication network, for example, the technical solutions of the embodiments of the present application can be applied in an optical fiber amplifier (or simply referred to as an optical amplifier) in an optical fiber communication network. The optical fiber amplifier is mainly located in an optical amplifier site and an optical amplifier network element in the optical fiber communication network. The technical solutions of the embodiments of the present application can be used to implement an optical fiber amplifier that amplifies an optical signal.

[0059] With the rapid development of new services such as cloud computing and Internet Protocol television (IPTV), people's requirements for information transmission capacity and rate are increasing, data traffic is growing explosively, and network capacity is gradually reaching a bottleneck. Various multiplexing technologies are effective ways to increase capacity. Among them, wavelength division multiplexing (WDM) is a mature multiplexing technology that has been widely used in communication networks. In wavelength division multiplexing, the optical spectrum is divided into several non-overlapping wavelength bands, each wavelength provides a single communication channel to transmit different signals, fully utilizes the bandwidth of the optical fiber, and realizes the simultaneous transmission of multiple services on one optical fiber.

[0060] Currently, an optical WDM system can include an optical transmitter, an optical receiver, an optical multiplexer, an optical fiber amplifier (or simply referred to as an optical amplifier), and an optical demultiplexer. At the sending end, an optical multiplexer is used to combine signals of different wavelengths with an optical carrier and send them into an optical fiber for propagation. The optical fiber amplifier is mainly located in the middle of the optical fiber line (or line optical fiber) in the optical fiber communication network, amplifies the optical signal, and extends the transmission distance of the optical signal. At the receiving end, an optical demultiplexer (or wave splitter) is used to separate the optical carriers carrying different signal wavelengths. This technology is not only suitable for single-mode or multi-mode optical fiber communication systems, but also suitable for one-way or two-way transmission.

[0061] In the existing optical fiber communication system for bidirectional optical transmission, the optical amplifier, such as erbium-doped fiber amplifier (EDFA) developed in recent years, needs to be shared by each direction of optical transmission. For the bidirectional optical transmission system, independent EDFA needs to be used for each direction of optical transmission. Thus, the structure of the bidirectional optical transmission system is more complex, and the device cost is greatly increased.

[0062] Based on this, the present application aims to provide an optical amplifier module, an optical amplification system and an optical fiber communication system, which can simplify the existing bidirectional optical transmission system, save device cost and simplify system structure while realizing uniform amplification of bidirectional links.

[0063] Before introducing the embodiments of the present application, the technical terms involved in the present application are first explained.

[0064] Erbium-doped fiber amplifier (EDFA): an optical fiber amplifier using an erbium-doped optical fiber as a gain medium. The working principle of EDFA is to inject an optical signal into an erbium-doped optical fiber by a laser, and when the optical signal passes through the erbium-doped optical fiber, the erbium element will absorb photons and transition to a high energy level, and then release energy by spontaneous emission, thereby amplifying the optical signal.

[0065] Semiconductor optical amplifier (SOA): an optical device based on semiconductor material, which can amplify the input optical signal and enhance the intensity of the optical signal. The working principle of SOA is to use the effect of electron-hole recombination in semiconductor material to produce photons, and the input optical signal interacts with the photons produced by electron-hole recombination, so that the optical signal is amplified. Since SOA does not need a pump source, and the films on both sides of the device are anti-reflection coatings, it is not sensitive to the direction of the optical path, which is beneficial to bidirectional amplification.

[0066] Fiber optic circulator (FOC): a multi-port optical device with non-reciprocal characteristics. When the optical signal is input from any port, it can be output from the next port in the order of the figure with very small loss, and the loss of the port leading to all other ports is very large, becoming an incommunicable port.

[0067] For example, FIG. 1 is a schematic diagram of an optical circulator. As shown in FIG. 1, an optical signal input from port 1 can be output from port 2, and an optical signal input from port 2 can be output from port 3, but cannot be output from port 1. Correspondingly, an optical signal input from port 3 also cannot be output from ports 1 and 2. Therefore, the circulator also has an isolation effect on the optical path, which can prevent reverse optical interference. It should be understood that FIG. 1 is only an example, and the present application is not limited thereto.

[0068] In order to facilitate understanding of the embodiments of the present application, the following description is made.

[0069] First, in the embodiments of the present application shown below, the first, second, third, fourth, and various numerical designations are only for differentiation for convenience of description, and are not intended to limit the scope of the embodiments of the present application. For example, different states of the optical signal after different steps are differentiated.

[0070] Second, in the embodiments of the present application shown below, the various optical elements are connected by optical fibers, specifically, the input or output pigtail of each element and the transmission optical fiber together constitute a section of optical fiber, which is used for transmission of signal light between elements.

[0071] Third, in the embodiments of the present application shown below, "and / or" can be used to describe the existence of three relationships between associated objects, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. Wherein A and B can be singular or plural.

[0072] Fourth, in the embodiments of the present application shown below, a module can also be understood as an element. For example, an optical amplifier module can also refer to an optical amplifier element, etc.

[0073] The embodiments provided by the present application will be described below in conjunction with specific drawings.

[0074] FIG. 2 is a schematic structural diagram of an optical amplifier module 200 provided by an embodiment of the present application. As shown in FIG. 2, the optical amplifier module can include a first circulator 210, an optical amplifier 220, and a second circulator 230.

[0075] The optical amplifier 220 is connected to the first circulator 210 and the second circulator 230, that is, one end of the optical amplifier 220 is connected to one port of the first circulator 210, and the other end of the optical amplifier 220 is connected to one port of the second circulator 230. The optical amplifier 220 is used to amplify the optical intensity of the first signal light input from the first circulator 210 to obtain second signal light, and output the second signal light to the second circulator 230. Further, the optical amplifier 220 is also used to amplify the optical intensity of the third signal light input from the second circulator 230 to obtain fourth signal light, and output the fourth signal light to the first circulator 210.

[0076] In a possible implementation, the optical amplifier 220 is a semiconductor optical amplifier. The description of the semiconductor optical amplifier can be referred to the foregoing description, and will not be repeated here.

[0077] Optionally, in a possible implementation, the optical amplifier module 200 can further include a first transforming module 240 and a second transforming module 250. For example, FIG. 3 is a schematic structural diagram of an optical amplifier module 200 according to another embodiment of the present application.

[0078] As shown in FIG. 3, the first transforming module 240 is connected with the first circulator 210, and is configured to combine the input N signal lights into a first signal light, and output the first signal light to the first circulator 210. The second transforming module 250 is connected with the second circulator 230, and is configured to separate the second signal light input by the optical amplifier 220 to the second circulator 230 into M fifth signal lights, and then output the M fifth signal lights.

[0079] Further, the second transforming module 250 is further configured to combine M sixth signal lights into a third signal light, and output the third signal light to the second circulator 230. The first transforming module 240 is further configured to separate the fourth signal light received from the first circulator 210 into N seventh signal lights, and then output the N seventh signal lights.

[0080] The connection relationship between the first transforming module 240, the first circulator 210 and the optical amplifier 220, and the connection relationship between the second transforming module 250, the second circulator 230 and the optical amplifier 220 will be described below in combination with FIG. 4.

[0081] As shown in FIG. 4, the first circulator 210 includes a first port, a second port and a third port, wherein the first port and the third port are connected with one end of the first transforming module 240, and the second port is connected with one end of the optical amplifier 220. The second circulator 230 includes a fourth port, a fifth port and a sixth port, wherein the fourth port and the sixth port are connected with one end of the second transforming module 250, and the fifth port is connected with the other end of the optical amplifier 220.

[0082] Specifically, in combination with FIG. 3 and FIG. 4, the first transforming module 240 combines the received N signal lights into one first signal light and outputs, the first circulator 210 receives the first signal light output by the first transforming module 240 through the first port, and then outputs the first signal light to the optical amplifier 220 through the second port. The optical amplifier 220 amplifies the intensity of the first signal light to obtain a second signal light and outputs, the second circulator 230 receives the second signal light through the fifth port, and further, the second circulator 230 outputs the second signal light to the second transforming module 250 through the fourth port. The second transforming module 250 decomposes the second signal light into M fifth signal lights after receiving the second signal light and outputs.

[0083] Correspondingly, the second transforming module 250 combines the received M sixth signal lights into one third signal light and outputs, the second circulator 230 receives the third signal light through the sixth port, and then outputs the third signal light to the optical amplifier 220 through the fifth port. The optical amplifier 220 amplifies the intensity of the third signal light to obtain a fourth signal light and outputs, the first circulator 210 receives the fourth signal light through the second port, and further, the first circulator 210 outputs the fourth signal light to the first transforming module 240 through the third port. The first transforming module 240 decomposes the fourth signal light into N seventh signal lights after receiving the fourth signal light and outputs.

[0084] It should be understood that FIG. 4 is only an example, and the present application is not limited in this regard.

[0085] It should be noted that the first transforming module 240 and the second transforming module 250 described above are both wavelength division multiplexing modules, and it should be understood that the present application is not limited in this regard.

[0086] It should be further noted that in the present application, the N signal lights received by the first transforming module 240 come from N first transceiver modules, and the separated M fifth signal lights output by the second transforming module 250 go to M second transceiver modules. Correspondingly, the M sixth signal lights received by the second transforming module 250 come from M second transceiver modules, and the separated N seventh signal lights output by the first transforming module 240 go to N first transceiver modules.

[0087] That is to say, in a possible implementation, the amplifier module described above can further include N first transceiver modules and M second transceiver modules.

[0088] FIG. 5 is a schematic structural diagram of an optical amplifier module 200 provided by another embodiment of the present application. As shown in FIG. 5, the optical amplifier module can further include N first transceiver modules (for example, 261 to 26n) and M second transceiver modules (for example, 271 to 27m).

[0089] The N first transceiver modules are connected with the other end of the first conversion module 240, and are used for outputting N signal lights to the first conversion module 240, that is, each first transceiver module outputs one signal light to the first conversion module 240; or the N first transceiver modules can also be used for receiving N seventh signal lights separated by the first conversion module 240, that is, the first conversion module 240 outputs one seventh signal light to each first transceiver module.

[0090] The M second transceiver modules are connected with the other end of the second conversion module 250, and are used for receiving M fifth signal lights separated by the second conversion module 250, that is, the second conversion module 250 outputs one fifth signal light to each second transceiver module; or the M second transceiver modules are used for outputting M sixth signal lights to the second conversion module 250, that is, each second transceiver module outputs one sixth signal light to the second conversion module 250.

[0091] It should be noted that, in the present application, N and M are both integers greater than or equal to 2.

[0092] For example, in a possible implementation, N can be equal to M, that is, the number of first transceiver modules is equal to the number of second transceiver modules.

[0093] If the number of first transceiver modules is equal to the number of second transceiver modules, it means that the number of signal lights input to the first conversion module 240 is equal to the number of fifth signal lights output by the second conversion module 250. Or, the number of sixth signal lights input to the second conversion module 250 is equal to the number of seventh signal lights output by the first conversion module 240.

[0094] For example, in a possible implementation, N can be equal to M, that is, the number of first transceiver modules is equal to the number of second transceiver modules.

[0095] For example, if N is greater than M, that is, the number of first transceiver modules is greater than the number of second transceiver modules, it means that the number of signal lights input to the first conversion module 240 is greater than the number of fifth signal lights output by the second conversion module 250. Or, the number of sixth signal lights input to the second conversion module 250 is less than the number of seventh signal lights output by the first conversion module 240.

[0096] For example, if N is less than M, that is, the number of first transceiver modules is less than the number of second transceiver modules, it means that the number of signal lights input to the first conversion module 240 is less than the number of fifth signal lights output by the second conversion module 250. Or, the number of sixth signal lights input to the second conversion module 250 is greater than the number of seventh signal lights output by the first conversion module 240.

[0097] It should be noted that, in a possible implementation, the first transceiving module and the second transceiving module can be a transceiving integrated module, i.e., the first transceiving module and the second transceiving module simultaneously have the functions of receiving signal light and transmitting signal light; or, in another possible implementation, the first transceiving module and the second transceiving module can be a module in which an independent receiving module and an independent transmitting module are coupled together. It should be understood that the present application does not limit this.

[0098] Optionally, in a possible implementation, the optical amplifier module 200 can further include a third conversion module, a fourth conversion module, a fifth conversion module, and a sixth conversion module. As shown in FIG. 6, FIG. 6 is a schematic structural diagram of an optical amplifier module 200 according to another embodiment of the present application.

[0099] The optical amplifier module 200 can further include a third conversion module 280, a fourth conversion module 290, a fifth conversion module 2100, and a sixth conversion module 110. The third conversion module 280 and the sixth conversion module 2110 are connected with the first circulator 210, and the fourth conversion module 290 and the fifth conversion module 2100 are connected with the second circulator 230.

[0100] Specifically, the third conversion module 280 is configured to combine the input N signal lights into a first signal light, and output the first signal light to the first circulator 210; and the fourth conversion module 290 is configured to separate the second signal light input from the second circulator 230 into M fifth signal lights, and then output the M fifth signal lights.

[0101] Further, the fifth conversion module 2100 is configured to combine the input M sixth signal lights into a third signal light, and output the third signal light to the second circulator 230; and the sixth conversion module 2110 is configured to separate the fourth signal light input from the first circulator 210 into N seventh signal lights, and output the N seventh signal lights.

[0102] The connection relationship between the third conversion module 280, the first circulator 210, the sixth conversion module 2110, and the optical amplifier 220, and the connection relationship between the fourth conversion module 290, the fifth conversion module 2100, the second circulator 230, and the optical amplifier 220 will be described below in combination with FIG. 7.

[0103] As shown in FIG. 7, the first circulator 210 includes a first port, a second port and a third port, wherein the first port is connected with one end of the third conversion module 280, the second port is connected with one end of the optical amplifier 220, and the third port is connected with one end of the sixth conversion module 2110. The second circulator 230 includes a fourth port, a fifth port and a sixth port, wherein the fourth port is connected with one end of the fourth conversion module 290, the fifth port is connected with the other end of the optical amplifier 220, and the sixth port is connected with one end of the fifth conversion module 2100.

[0104] Specifically, in combination with FIGS. 6 and 7, the third conversion module 280 combines the received N signal lights into a first signal light and outputs the first signal light, the first circulator 210 receives the first signal light output by the third conversion module 280 through the first port, and then the first circulator 210 outputs the first signal light to the optical amplifier 220 through the second port. The optical amplifier 220 amplifies the intensity of the first signal light to obtain a second signal light and outputs the second signal light, the second circulator 230 receives the second signal light through the fifth port, and further, the second circulator 230 outputs the second signal light to the fourth conversion module 290 through the fourth port. The fourth conversion module 290 separates the received second signal light into M fifth signal lights and outputs the M fifth signal lights.

[0105] Correspondingly, the fifth conversion module 2100 combines the received M sixth signal lights into a third signal light and outputs the third signal light, the second circulator 230 receives the third signal light through the sixth port, and then outputs the third signal light to the optical amplifier 220 through the fifth port. The optical amplifier 220 amplifies the intensity of the third signal light to obtain a fourth signal light and outputs the fourth signal light, the first circulator 210 receives the fourth signal light through the second port, and further, the first circulator 210 outputs the fourth signal light to the sixth conversion module 2110 through the third port. The sixth conversion module 2110 separates the received fourth signal light into N seventh signal lights and outputs the N seventh signal lights.

[0106] It should be understood that FIG. 7 is only an example, and the present application is not limited in this regard.

[0107] It should be noted that the third conversion module 280, the fourth conversion module 290, the fifth conversion module 2100 and the sixth conversion module 2110 described above are wavelength division multiplexing modules, and it should be understood that the present application is not limited in this regard.

[0108] It should be further noted that in the present application, the N signal lights received by the third conversion module 280 come from N third transceiver modules, and the separated M fifth signal lights output by the fourth conversion module 290 are output to M fourth transceiver modules. Correspondingly, the M sixth signal lights received by the fifth conversion module 2100 come from M fourth transceiver modules, and the separated N seventh signal lights output by the sixth conversion module 2110 are output to N third transceiver modules.

[0109] That is to say, in a possible implementation, the amplifier module described in the foregoing can further include N third transceiver modules and M fourth transceiver modules.

[0110] FIG. 8 is a schematic structural diagram of an optical amplifier module 200 according to another embodiment of the present application. As shown in FIG. 8, the optical amplifier module 200 can further include N third transceiver modules (for example, 2121 to 212n) and M fourth transceiver modules (for example, 2131 to 213m).

[0111] The N third transceiver modules are connected with the other end of the third conversion module 280 and the sixth conversion module 2110, and are configured to output N signal lights to the third conversion module 280, that is, each third transceiver module outputs one signal light to the third conversion module 280; or the N third transceiver modules can also be configured to receive N seventh signal lights separated by the sixth conversion module 2110, that is, the sixth conversion module 2110 outputs one seventh signal light to each third transceiver module.

[0112] The M fourth transceiver modules are connected with the other end of the fourth conversion module 290 and the fifth conversion module 2100, and are configured to receive M fifth signal lights separated by the fourth conversion module 290, that is, the fourth conversion module 290 outputs one fifth signal light to each fourth transceiver module; or the M fourth transceiver modules are configured to output M sixth signal lights to the fifth conversion module 2100, that is, each fourth transceiver module outputs one sixth signal light to the fifth conversion module 2100.

[0113] It should be noted that, in the present application, N and M are both integers greater than or equal to 2.

[0114] For example, in a possible implementation, N can be equal to M, that is, the number of third transceiver modules is equal to the number of fourth transceiver modules.

[0115] If the number of third transceiver modules is equal to the number of fourth transceiver modules, it means that the number of signal lights input to the third conversion module 280 is equal to the number of fifth signal lights output by the fourth conversion module 290. Or, the number of sixth signal lights input to the fifth conversion module 2100 is equal to the number of seventh signal lights output by the sixth conversion module 2110.

[0116] For example, in a possible implementation, N can also be not equal to M, that is, the number of third transceiver modules is different from the number of fourth transceiver modules.

[0117] For example, if N is greater than M, i.e. the number of third transceiving modules is greater than the number of fourth transceiving modules, it means that the number of signal lights input into the third conversion module 280 is greater than the number of fifth signal lights output from the fourth conversion module 290. In other words, the number of sixth signal lights input into the fifth conversion module 2100 is less than the number of seventh signal lights output from the sixth conversion module 2110.

[0118] For example, if N is greater than M, i.e. the number of third transceiving modules is greater than the number of fourth transceiving modules, it means that the number of signal lights input into the third conversion module 280 is greater than the number of fifth signal lights output from the fourth conversion module 290. In other words, the number of sixth signal lights input into the fifth conversion module 2100 is less than the number of seventh signal lights output from the sixth conversion module 2110.

[0119] It is also noted that, in one possible implementation, the third transceiving module and the fourth transceiving module can be integrated modules, i.e. the third transceiving module and the fourth transceiving module have both the function of receiving signal lights and the function of transmitting signal lights; or, in another possible implementation, the third transceiving module and the fourth transceiving module can be modules in which independent receiving modules and independent transmitting modules are coupled together. It is understood that the present application does not limit this.

[0120] It is also noted that, in one possible implementation, the third transceiving module and the fourth transceiving module can be integrated modules, i.e. the third transceiving module and the fourth transceiving module have both the function of receiving signal lights and the function of transmitting signal lights; or, in another possible implementation, the third transceiving module and the fourth transceiving module can be modules in which independent receiving modules and independent transmitting modules are coupled together. It is understood that the present application does not limit this.

[0121] The present application also provides an optical amplifier system, which comprises the first circulator 210, the optical amplifier 220, the second circulator 230, the first conversion module 240 and the second conversion module 250 as described above. Optionally, the optical amplifier system can further comprise other optical devices.

[0122] The present application also provides an optical amplifier system, which comprises the first circulator 210, the optical amplifier 220, the second circulator 230, the third conversion module 280, the fourth conversion module 290, the fifth conversion module 2100 and the sixth conversion module 2110 as described above. Optionally, the optical amplifier system can further comprise other optical devices.

[0123] The application further provides an optical fiber communication system, which comprises the first circulator 210, the optical amplifier 220, the second circulator 230, the first conversion module 240, the second conversion module 250, N first transceiver modules and M second transceiver modules.

[0124] The application further provides an optical fiber communication system, which comprises the first circulator 210, the optical amplifier 220, the second circulator 230, the third conversion module 280, the fourth conversion module 290, the fifth conversion module 2100, the sixth conversion module 2110, N third transceiver modules and M fourth transceiver modules. Optionally, the optical fiber communication system can further comprise other optical devices.

[0125] According to the technical scheme provided by the application, the signal light transmitted in two directions can pass through the same optical amplifier, thereby greatly reducing the number of devices, saving the cost of devices and simplifying the structure of the system while realizing uniform amplification of the bidirectional link.

[0126] The optical communication method provided by the embodiment of the application will be described below with reference to FIG. 9.

[0127] FIG. 9 is a schematic flowchart of an optical communication method 900 provided by the embodiment of the application. As shown in FIG. 9, the method can at least comprise the following steps.

[0128] S910, the first circulator outputs the first signal light to the optical amplifier, and correspondingly, the optical amplifier receives the first signal light.

[0129] Optionally, before step S910, the method can further comprise: the first circulator receives the first signal light.

[0130] In a possible implementation, the first signal light received by the first circulator comes from the first conversion module. Specifically, the first conversion module receives N signal lights and combines the N signal lights into the first signal light and outputs the first signal light to the first circulator. Optionally, the first conversion module receives the signal light output by the N first transceiver modules.

[0131] In a possible implementation, the first signal light received by the first circulator comes from the third conversion module. Specifically, the third conversion module receives N signal lights and combines the N signal lights into the first signal light and outputs the first signal light to the first circulator. Optionally, the third conversion module receives the signal light output by the N third transceiver modules.

[0132] S920, the optical amplifier amplifies the first signal light in optical intensity to obtain the second signal light.

[0133] Optionally, in a possible implementation, the optical amplifier is a semiconductor optical amplifier.

[0134] S930, the optical amplifier outputs the second signal light to the second circulator, and correspondingly, the second circulator receives the second signal light.

[0135] Optionally, after step S930, the method can further include that the second circulator outputs the second signal light.

[0136] In a possible implementation, the second circulator outputs the second signal light to the second conversion module, and correspondingly, the second conversion module receives the second signal light. The second conversion module separates the second signal light into M fifth signal lights. Optionally, the second conversion module outputs the M fifth signal lights to M second transceiver modules.

[0137] In a possible implementation, the second circulator outputs the second signal light to the fourth conversion module, and correspondingly, the fourth conversion module receives the second signal light. The fourth conversion module separates the second signal light into M fifth signal lights. Optionally, the fourth conversion module outputs the M fifth signal lights to M fourth transceiver modules.

[0138] S940, the second circulator outputs the third signal light to the optical amplifier, and correspondingly, the optical amplifier receives the third signal light.

[0139] Optionally, before step S940, the method can further include that the second circulator receives the third signal light.

[0140] In a possible implementation, the third signal light received by the second circulator comes from the second conversion module. Specifically, the second conversion module receives M sixth signal lights, combines the M sixth signal lights into one third signal light, and outputs the third signal light. Optionally, the second conversion module receives the sixth signal light output by the M second transceiver modules.

[0141] In a possible implementation, the third signal light received by the second circulator comes from the fifth conversion module. The fifth conversion module receives M sixth signal lights, combines the M sixth signal lights into one third signal light, and outputs the third signal light. Optionally, the fifth conversion module receives the sixth signal light output by the M fourth transceiver modules.

[0142] S950, the optical amplifier amplifies the intensity of the third signal light to obtain a fourth signal light.

[0143] S960, the optical amplifier outputs the fourth signal light to the first circulator, and correspondingly, the first circulator receives the fourth signal light.

[0144] Optionally, after step S960, the method can further include that the first circulator outputs the fourth signal light.

[0145] In a possible implementation, the first circulator outputs the fourth signal light to the first conversion module, and correspondingly, the first conversion module receives the fourth signal light. After receiving the fourth signal light, the first conversion module separates the fourth signal light into N seventh signal lights and outputs the N seventh signal lights. Optionally, the first conversion module outputs the N seventh signal lights to the N first transceiver modules respectively.

[0146] In a possible implementation, the first circulator outputs the fourth signal light to the sixth conversion module, and correspondingly, the sixth conversion module receives the fourth signal light. After receiving the fourth signal light, the sixth conversion module separates the fourth signal light into N seventh signal lights and outputs the N seventh signal lights. Optionally, the sixth conversion module outputs the N seventh signal lights to the N third transceiver modules respectively.

[0147] It should be noted that the first conversion module to the sixth conversion module described above are all wavelength division multiplexing modules, and it should be understood that the present application does not limit this.

[0148] It should be noted that in the present application, N and M are both integers greater than or equal to 2.

[0149] For example, in a possible implementation, N can be equal to M, that is, the number of the first transceiver modules and the second transceiver modules is the same.

[0150] For example, in a possible implementation, N can also be not equal to M, that is, the number of the first transceiver modules and the second transceiver modules is different.

[0151] It should be further noted that in one case, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights described above are completely different. Alternatively, in another case, the wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights described above are partially different.

[0152] According to the above technical solution, the signal light transmitted in two directions can all pass through the same optical amplifier, which greatly reduces the number of devices, thereby saving the cost of devices and simplifying the system structure while realizing uniform amplification of the bidirectional link.

[0153] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software mode depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0154] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0155] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0156] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0157] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0158] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the essential part or part of the technical solutions that make contributions to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0159] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An optical amplifier module, characterized by, The optical amplifier module comprises a first circulator, an optical amplifier and a second circulator, The optical amplifier is connected with the first circulator and the second circulator respectively, The optical amplifier is configured to amplify the first signal light input from the first circulator to obtain second signal light, and output the second signal light to the second circulator. The optical amplifier is further configured to amplify the third signal light input from the second circulator to obtain fourth signal light, and output the fourth signal light to the first circulator.

2. The optical amplifier module of claim 1, wherein, The optical amplifier module further comprises a first conversion module connected with the first circulator, and a second conversion module connected with the second circulator, The first conversion module is configured to combine N signal lights input to obtain the first signal light and output to the first circulator; The second conversion module is configured to separate the second signal light input from the second circulator to obtain M fifth signal lights and output; The second conversion module is further configured to combine M sixth signal lights input to obtain the third signal light and output to the second circulator; The first conversion module is further configured to separate the fourth signal light input from the first circulator to obtain N seventh signal lights and output; Wherein, N is an integer greater than or equal to 2.

3. The optical amplifier module of claim 2, wherein, The optical amplifier module further comprises N first transceiver modules connected with the first conversion module, and M second transceiver modules connected with the second conversion module, wherein M is an integer greater than or equal to 2, Each first transceiver module is configured to output one of the signal lights to the first conversion module; Each second transceiver module is configured to receive one of the fifth signal lights input from the second conversion module; Each second transceiver module is further configured to output one of the sixth signal lights to the second conversion module; Each first transceiver module is further configured to receive one of the seventh signal lights input from the first conversion module.

4. The optical amplifier module of claim 2 or 3, wherein The first circulator comprises a first port, a second port and a third port, and the second circulator comprises a fourth port, a fifth port and a sixth port, The first port and the third port are connected with the first conversion module, the second port is connected with one end of the optical amplifier, the fourth port and the sixth port are connected with the second conversion module, and the fifth port is connected with the other end of the optical amplifier; The first circulator receives the first signal light through the first port, and the first circulator is further configured to output the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

5. The optical amplifier module of claim 1, wherein, The optical amplifier further comprises a third conversion module and a sixth conversion module connected with the first circulator, and a fourth conversion module and a fifth conversion module connected with the second circulator, The third conversion module is configured to combine N signal lights input to obtain the first signal light and output to the first circulator; The fourth conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights and output the M fifth signal lights. The fifth conversion module is configured to combine M sixth signal lights input into the third signal light and output the third signal light to the second circulator. The sixth conversion module is configured to separate the fourth signal light input from the first circulator into N seventh signal lights and output the N seventh signal lights. N is an integer greater than or equal to 2.

6. The optical amplifier module of claim 5, wherein, The optical amplifier module further comprises N third transceiver modules connected with the third conversion module and the sixth conversion module, and M fourth transceiver modules connected with the fourth conversion module and the fifth conversion module, wherein M is an integer greater than or equal to 2. Each third transceiver module is configured to output one of the signal lights to the third conversion module. Each fourth transceiver module is configured to receive one of the fifth signal lights input from the fourth conversion module. Each fourth transceiver module is further configured to output one of the sixth signal lights to the fifth conversion module. Each third transceiver module is further configured to receive one of the seventh signal lights input from the sixth conversion module.

7. The optical amplifier module of claim 5 or 6, wherein The first circulator comprises a first port, a second port and a third port, and the second circulator comprises a fourth port, a fifth port and a sixth port. The first port is connected with the third conversion module, the second port is connected with one end of the optical amplifier, the third port is connected with the sixth conversion module, the fifth port is connected with the other end of the optical amplifier, the fourth port is connected with the fourth conversion module, and the sixth port is connected with the fifth conversion module. The first circulator receives the first signal light through the first port, and the first circulator is further configured to output the fourth signal light through the third port. The second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

8. The optical amplifier module of any one of claims 2 to 7, wherein The wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are completely different; or The wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are partially different.

9. The optical amplifier module of any of claims 1 to 8, wherein, The optical amplifier is a semiconductor optical amplifier.

10. The optical amplifier module of any of claims 2 to 9, wherein, The first conversion module, the second conversion module, the third conversion module, the fourth conversion module, the fifth conversion module and the sixth conversion module are wavelength division multiplexing modules.

11. An optical amplifier system, characterized by, The optical amplifier module comprises a first circulator, an optical amplifier, a second circulator, a first conversion module and a second conversion module, The optical amplifier is connected with the first circulator and the second circulator respectively, the first conversion module is connected with the first circulator, and the second conversion module is connected with the second circulator, The first conversion module is configured to combine N input signal lights into first signal light and output the first signal light to the first circulator. The optical amplifier is configured to amplify the first signal light input from the first circulator to obtain second signal light, and output the second signal light to the second circulator. The second conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights and output the M fifth signal lights. The second conversion module is further configured to combine M sixth signal lights into third signal light and output the third signal light to the second circulator. The optical amplifier is further configured to amplify the third signal light input from the second circulator to obtain fourth signal light, and output the fourth signal light to the first circulator. The first conversion module is further configured to separate the fourth signal light input from the first circulator into N seventh signal lights and output the N seventh signal lights. N is an integer greater than or equal to 2.

12. The optical amplifier system of claim 11, wherein The first circulator comprises a first port, a second port and a third port, and the second circulator comprises a fourth port, a fifth port and a sixth port, The first port and the third port are connected with the first conversion module, the second port is connected with one end of the optical amplifier, the fourth port and the sixth port are connected with the second conversion module, and the fifth port is connected with the other end of the optical amplifier; The first circulator receives the first signal light through the first port, and the first circulator is further configured to output the fourth signal light through the third port, the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

13. An optical amplifier system, characterized by, The first circulator, the optical amplifier, the second circulator, the third conversion module, the fourth conversion module, the fifth conversion module and the sixth conversion module are provided, The optical amplifier is connected with the first circulator and the second circulator respectively, the third conversion module and the sixth conversion module are connected with the first circulator, and the fourth conversion module and the fifth conversion module are connected with the second circulator, The third conversion module is configured to combine N input signal lights into first signal light and output the first signal light to the first circulator. The optical amplifier is configured to amplify the first signal light input from the first circulator to obtain second signal light, and output the second signal light to the second circulator. The fourth conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights and output the M fifth signal lights. The fifth conversion module is configured to combine M sixth signal lights into third signal light and output the third signal light to the second circulator. The optical amplifier is further configured to amplify the third signal light input from the second circulator to obtain fourth signal light, and output the fourth signal light to the first circulator. The sixth conversion module is configured to separate the fourth signal light input from the first circulator into N seventh signal lights and output the N seventh signal lights. N is an integer greater than or equal to 2.

14. The optical amplifier system according to claim 13, wherein The first circulator comprises a first port, a second port and a third port, and the second circulator comprises a fourth port, a fifth port and a sixth port, The first port is connected to the third conversion module, the second port is connected to one end of the optical amplifier, the third port is connected to the sixth conversion module, the fifth port is connected to the other end of the optical amplifier, the fourth port is connected to the fourth conversion module, and the sixth port is connected to the fifth conversion module; The first circulator receives the first signal light through the first port, and the first circulator is configured to output the fourth signal light through the third port, and the second circulator outputs the second signal light through the fourth port, and the second circulator is configured to receive the third signal light through the sixth port.

15. An optical fiber communication system, comprising: Comprise: A first circulator, an optical amplifier, a second circulator, a first conversion module, a second conversion module, N first transceiver modules and M second transceiver modules, wherein N and M are integers greater than or equal to 2, The optical amplifier is connected to the first circulator and the second circulator respectively, the first conversion module is connected to the first circulator and the N first transceiver modules respectively, and the second conversion module is connected to the second circulator and the N second transceiver modules respectively, The first conversion module is configured to combine N signal lights input from the N first transceiver modules respectively into a first signal light and output the first signal light to the first circulator; The optical amplifier is configured to perform optical intensity amplification on the first signal light input from the first circulator to obtain a second signal light, and output the second signal light to the second circulator; The second conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights, and output the M fifth signal lights to the N second transceiver modules respectively; The second conversion module is further configured to combine M sixth signal lights input from the N second transceiver modules into a third signal light and output the third signal light to the second circulator; The optical amplifier is further configured to perform optical intensity amplification on the third signal light input from the second circulator to obtain a fourth signal light, and output the fourth signal light to the first circulator; The first conversion module is further configured to separate the fourth signal light input from the first circulator into N seventh signal lights, and output the N seventh signal lights to the N first transceiver modules respectively.

16. The optical fiber communication system according to claim 15, wherein The first circulator comprises a first port, a second port and a third port, and the second circulator comprises a fourth port, a fifth port and a sixth port, The first port and the third port are connected with the first conversion module, the second port is connected with one end of the optical amplifier, the fourth port and the sixth port are connected with the second conversion module, and the fifth port is connected with the other end of the optical amplifier; The first circulator receives the first signal light through the first port, and outputs the fourth signal light through the third port; and the second circulator outputs the second signal light through the fourth port, and receives the third signal light through the sixth port.

17. An optical fiber communication system, comprising: It comprises: a first circulator, an optical amplifier, a second circulator, a third conversion module, a fourth conversion module, a fifth conversion module, a sixth conversion module, N third transceiver modules and M fourth transceiver modules, wherein N and M are integers greater than or equal to 2, The optical amplifier is connected with the first circulator and the second circulator respectively, the third conversion module and the sixth conversion module are connected with the first circulator and the N third transceiver modules respectively, and the fourth conversion module and the fifth conversion module are connected with the second circulator and the N fourth transceiver modules respectively, The third conversion module is configured to combine signal light input from the N third transceiver modules into first signal light and output the first signal light to the first circulator; The optical amplifier is configured to amplify the first signal light input from the first circulator in optical intensity to obtain second signal light, and output the second signal light to the second circulator; The fourth conversion module is configured to separate the second signal light input from the second circulator into M fifth signal lights, and output the M fifth signal lights to the N fourth transceiver modules respectively; The fifth conversion module is configured to combine sixth signal light input from the N fourth transceiver modules into third signal light and output the third signal light to the second circulator; The optical amplifier is further configured to amplify the third signal light input from the second circulator in optical intensity to obtain fourth signal light, and output the fourth signal light to the first circulator; The sixth conversion module is configured to separate the fourth signal light input from the first circulator into N seventh signal lights, and output the N seventh signal lights to the N third transceiver modules respectively.

18. The optical fiber communication system according to claim 17, wherein The first circulator comprises a first port, a second port and a third port, and the second circulator comprises a fourth port, a fifth port and a sixth port, The first port is connected with the third conversion module, the second port is connected with one end of the optical amplifier, the third port is connected with the sixth conversion module, the fifth port is connected with the other end of the optical amplifier, the fourth port is connected with the fourth conversion module, and the sixth port is connected with the fifth conversion module. The first circulator receives the first signal light through the first port, and the first circulator is further configured to output the fourth signal light through the third port; the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

19. A method of optical communication, the method comprising: The method comprises: The optical amplifier amplifies the first signal light input from the first circulator to obtain the second signal light, and outputs the second signal light to the second circulator; The optical amplifier further amplifies the third signal light input from the second circulator to obtain the fourth signal light, and outputs the fourth signal light to the first circulator.

20. The optical communication method of claim 19, wherein, The method further comprises: The first conversion module combines N input signal lights into the first signal light and outputs the first signal light to the first circulator; The second conversion module separates the second signal light input from the second circulator into M fifth signal lights and outputs the M fifth signal lights; The second conversion module further combines M sixth signal lights input into the third signal light and outputs the third signal light to the second circulator; The first conversion module further separates the fourth signal light input from the first circulator into N seventh signal lights and outputs the N seventh signal lights; N is an integer greater than or equal to 2.

21. The optical communication method of claim 20, wherein, The method further comprises: Each first transceiver module outputs one signal light to the first conversion module; Each second transceiver module receives one fifth signal light input from the second conversion module; The each second transceiver module further outputs one sixth signal light to the second conversion module; Each first transceiver module further receives one seventh signal light input from the first conversion module.

22. The optical communication method of claim 19, wherein, The method further comprises: The third conversion module combines N input signal lights into the first signal light and outputs the first signal light to the first circulator; The fourth conversion module separates the second signal light input from the second circulator into M fifth signal lights and outputs the M fifth signal lights; The fifth conversion module combines M sixth signal lights input into the third signal light and outputs the third signal light to the second circulator; The sixth conversion module separates the fourth signal light input from the first circulator into N seventh signal lights and outputs the N seventh signal lights.

23. The optical communication method of claim 21, wherein, The method further comprises: Each third transceiver module outputs one signal light to the third conversion module; Each fourth transceiver module receives one fifth signal light input from the fourth conversion module; The each fourth transceiver module further outputs one sixth signal light to the fifth conversion module; The each third transceiver module further receives one seventh signal light input from the sixth conversion module.

24. The optical communication method according to any one of claims 20 to 23, wherein The first circulator receives the first signal light through the first port, and the first circulator is further configured to output the fourth signal light through the third port; the second circulator outputs the second signal light through the fourth port, and the second circulator is further configured to receive the third signal light through the sixth port.

25. The optical communication method according to any one of claims 20 to 24, wherein Wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are completely different; or Wavelengths of the N signal lights, the M fifth signal lights, the M sixth signal lights and the N seventh signal lights are partially different.

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