Optical amplifier module and optical amplification system

Abstract

The invention provides an optical amplifier module and an optical amplification system.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, the optical amplifier is used for conducting light intensity amplification on first signal light input from the first circulator to obtain second signal light, and the second signal light is used for outputting the second signal light; the second signal light is output to the second circulator; and the optical amplifier is also used for performing light intensity amplification on the third signal light input from the second circulator to obtain fourth signal light, and outputting the fourth signal light to the first circulator. Based on the above technical scheme, the signal light transmitted in two directions can pass through the same optical amplifier, and the number of devices is greatly reduced, so that uniform amplification of a bidirectional link is realized, the device cost is saved, and the system structure is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical communication, and in particular to an optical amplifier module and an optical amplification system. BACKGROUND

[0002] 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 limitation, the prior art 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.

[0003] The optical fiber amplifier developed in recent years, such as erbium-doped fiber amplifier (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 device cost.

[0004] 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

[0005] 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.

[0006] 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.

[0007] In a possible implementation manner, the optical amplifier is a semiconductor optical amplifier.

[0008] In this application, since both the first and second circulators have three optical ports and can function as optical isolators, by connecting the first and second circulators to the two ends of the optical amplifier respectively, signal light transmitted in both directions can pass through the same optical amplifier, greatly reducing the number of components. This achieves uniform amplification of the bidirectional link while saving component costs and simplifying the system structure. Furthermore, since the circulators also function as optical isolators, system stability can be ensured.

[0009] In conjunction with 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 used to combine N input signal lights into the first signal light and output it to the first circulator; the second conversion module is used to separate the second signal light input from the second circulator into M fifth signal lights and output them; the second conversion module is also used to combine M input sixth signal lights into the third signal light and output it to the second circulator; the first conversion module is also used to separate the fourth signal light input from the first circulator into N seventh signal lights and output them; wherein N is an integer greater than or equal to 2.

[0010] In conjunction with 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 used to output one of the signal lights to the first conversion module; each second transceiver module is used to receive one of the fifth signal lights input from the second conversion module; each second transceiver module is also used to output one of the sixth signal lights to the second conversion module; and each first transceiver module is also used to receive one of the seventh signal lights input from the first conversion module.

[0011] In conjunction with 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. The first circulator receives the first signal light through the first port; 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.

[0012] In conjunction with 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 to the first circulator, and a fourth conversion module and a fifth conversion module connected to the second circulator. The third conversion module is used to combine N input signal lights into the first signal light and output it to the first circulator; the fourth conversion module is used to separate the second signal light input from the second circulator into M fifth signal lights and output them; the fifth conversion module is used to combine the M input sixth signal lights into the third signal light and output it to the second circulator; the sixth conversion module is used to separate the fourth signal light input from the first circulator into N seventh signal lights and output them; wherein N is an integer greater than or equal to 2.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the optical amplifier module further includes: N third transceiver modules connected to the third conversion module and the sixth conversion module, and M fourth transceiver modules connected to 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 used to output one of the signal lights to the third conversion module; each fourth transceiver module is used to receive one of the fifth signal lights input from the fourth conversion module; each fourth transceiver module is also used to output one of the sixth signal lights to the fifth conversion module; and each third transceiver module is also used to receive one of the seventh signal lights input from the sixth conversion module.

[0014] In conjunction with 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 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; 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.

[0015] In conjunction with 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.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the optical amplifier is a semiconductor optical amplifier. In this application, using a semiconductor optical amplifier that is insensitive to the optical path for optical amplification ensures bidirectional light amplification.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the first transformation module, the second transformation module, the third transformation module, the fourth transformation module, the fifth transformation module, and the sixth transformation module are wavelength division multiplexing modules.

[0018] In a second aspect, an optical amplifier system is provided, including a first circulator, an optical amplifier, a second circulator, a first conversion module, and a second conversion module. The optical amplifier is connected to both the first circulator and the second circulator. The first conversion module is connected to the first circulator, and the second conversion module is connected to the second circulator. The first 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 and output the second signal light to the first circulator. The second circulator; the second conversion module is used to separate the second signal light input from the second circulator into M fifth signal lights and output them; the second conversion module is also used to merge the M sixth signal lights into a third signal light and output it to the second circulator; the optical amplifier is also used to amplify the 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 also used to separate the fourth signal light input from the first circulator into N seventh signal lights and output them; where N is an integer greater than or equal to 2.

[0019] In conjunction with the second aspect, in some implementations of the second 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 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. 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.

[0020] 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.

[0021] In conjunction with the second aspect, in some implementations of the second aspect, the optical amplifier is a semiconductor optical amplifier.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] In conjunction with the third aspect, in some implementations of the third 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.

[0026] In conjunction with the third aspect, in some implementations of the third aspect, the optical amplifier is a semiconductor optical amplifier.

[0027] In conjunction with the third aspect, in some implementations of the third aspect, the third transformation module, the fourth transformation module, the fifth transformation module, and the sixth transformation module are wavelength division multiplexing modules.

[0028] Fourthly, an optical fiber communication system is provided, 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, wherein N and M are both integers greater than or equal to 2; 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 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 used to combine N signal lights input from the N first transceiver modules 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 transceiver module is configured to: ...

[0029] In conjunction with 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 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. The first circulator receives the first signal light through the first port; 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.

[0030] In conjunction with 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.

[0031] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the optical amplifier is a semiconductor optical amplifier.

[0032] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first transformation module and the second transformation module are wavelength division multiplexing modules.

[0033] Fifthly, 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, wherein N and M are both integers greater than or equal to 2; wherein 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 N third transceiver modules respectively; and the fourth and fifth conversion modules are connected to the second circulator and the N fourth transceiver modules respectively; the third conversion module is used to combine the signal light input from the N third transceiver modules into a first signal light and output it to the first circulator; the optical amplifier is used to combine the signal light input from the first circulator into a first signal light. The first signal light is amplified to obtain a second signal light, and the second signal light is output to the second circulator; the fourth conversion module is used 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 used to merge the sixth signal lights input from the N fourth transceiver modules into a third signal light and output it to the second circulator; the optical amplifier is also used to amplify 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 sixth conversion module is used 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.

[0034] In conjunction with the fifth aspect, in some implementations of the fifth 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.

[0035] In conjunction with the fifth aspect, in some implementations of 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.

[0036] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the optical amplifier is a semiconductor optical amplifier.

[0037] In conjunction with the fifth aspect, in some implementations of the fifth aspect, the third transformation module, the fourth transformation module, the fifth transformation module, and the sixth transformation module are wavelength division multiplexing modules.

[0038] A sixth aspect provides an optical communication method, comprising: an optical amplifier amplifying the intensity of 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 also amplifying the intensity of 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.

[0039] In conjunction with the sixth aspect, in some implementations of the sixth aspect, the method further includes: a first conversion module merging the N input signal lights into the first signal light and outputting it to the first circulator; a second conversion module separating the second signal light input from the second circulator into M fifth signal lights and outputting them; the second conversion module also merging the M input sixth signal lights into the third signal light and outputting it to the second circulator; and the first conversion module also separating the fourth signal light input from the first circulator into N seventh signal lights and outputting them.

[0040] Where N is an integer greater than or equal to 2.

[0041] In conjunction with the sixth aspect, in some implementations of the sixth aspect, the method further includes: each first transceiver module outputting one of the signal lights to the first conversion module; each second transceiver module receiving one of the fifth signal lights input from the second conversion module; each second transceiver module also outputting one of the sixth signal lights to the second conversion module; and each first transceiver module also receiving one of the seventh signal lights input from the first conversion module.

[0042] In conjunction with the sixth aspect, in some implementations of the sixth aspect, the method further includes: a third conversion module merging the N input signal lights into the first signal light and outputting it to the first circulator; a fourth conversion module separating the second signal light input from the second circulator into M fifth signal lights and outputting them; a fifth conversion module merging the M input sixth signal lights into the third signal light and outputting it to the second circulator; and a sixth conversion module separating the fourth signal light input from the first circulator into N seventh signal lights and outputting them.

[0043] In conjunction with the sixth aspect, in some implementations of the sixth aspect, the method further includes: each third transceiver module outputting one of the signal lights to the third conversion module; each fourth transceiver module receiving one of the fifth signal lights input from the fourth conversion module; each fourth transceiver module also outputting one of the sixth signal lights to the fifth conversion module; and each third transceiver module also receiving one of the seventh signal lights input from the sixth conversion module.

[0044] In conjunction with 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 also 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 also receives the third signal light through the sixth port.

[0045] In conjunction with 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.

[0046] For a detailed description and technical effect of the second and sixth aspects, please refer to the detailed description and technical effect of the first aspect above. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of an optical circulator.

[0048] Figure 2 This is a schematic structural diagram of an optical amplifier module 200 provided in an embodiment of this application.

[0049] Figure 3 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application.

[0050] Figure 4 The connection relationships of the first conversion module, the first circulator, and the optical amplifier are shown, as well as the connection relationships of the second conversion module, the second circulator, and the optical amplifier.

[0051] Figure 5 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application.

[0052] Figure 6 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application.

[0053] Figure 7The connection relationships between the third conversion module, the first circulator, the sixth conversion module and the optical amplifier are shown, as well as the connection relationships between the fourth conversion module, the fifth conversion module, the second circulator and the optical amplifier.

[0054] Figure 8 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application.

[0055] Figure 9 This is a schematic flowchart of an optical communication method 900 provided in an embodiment of this application. Detailed Implementation

[0056] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0057] The technical solutions of this application embodiment can be applied to optical fiber communication networks. For example, the technical solutions of this application embodiment can be used in optical fiber amplifiers (or simply optical amplifiers) in optical fiber communication networks. Optical fiber amplifiers are mainly located in optical amplifier stations and optical amplifier network elements in optical fiber communication networks. The technical solutions of this application embodiment can be used to implement optical fiber amplifiers that amplify optical signals.

[0058] With the rapid development of new services such as cloud computing and Internet Protocol television (IPTV), people's demands for information transmission capacity and speed are increasing daily, data traffic is growing explosively, and network capacity is gradually reaching its 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 WDM, the spectrum is divided into several non-overlapping wavelength bands, each wavelength providing a single communication channel to transmit different signals, making full use of fiber optic bandwidth and enabling multiple services to be transmitted simultaneously on a single fiber.

[0059] Currently, an optical WDM system can include an optical transmitter, an optical receiver, an optical multiplexer, an optical fiber amplifier (or simply an optical amplifier), and an optical demultiplexer. At the transmitting end, an optical multiplexer combines signals of different wavelengths with optical carriers and sends them into a single optical fiber for propagation. The optical fiber amplifier, mainly located in the middle of the optical fiber line (or line fiber) in an optical fiber communication network, amplifies the optical signal and extends its transmission distance. At the receiving end, an optical demultiplexer (or wavelength division multiplexer) separates these optical carriers carrying different signal wavelengths. This technology is applicable not only to single-mode or multimode optical fiber communication systems but also to unidirectional or bidirectional transmission.

[0060] In existing fiber optic communication systems that enable bidirectional optical transmission, each direction of optical transmission requires a shared optical amplifier. For example, the erbium-doped fiber amplifier (EDFA), developed in recent years, can only be used as a unidirectional amplifier. For bidirectional optical transmission systems, a separate EDFA is needed for each direction of optical transmission. This makes the structure of bidirectional optical transmission systems more complex and significantly increases the cost of components.

[0061] Based on this, this application aims to provide an optical amplifier module, an optical amplification system, and an optical fiber communication system, which can simplify existing bidirectional optical transmission systems, achieve uniform amplification of bidirectional links, save device costs, and simplify system structure.

[0062] Before introducing the embodiments of this application, the technical terms involved in this application will be explained first.

[0063] Erbium-doped fiber amplifier (EDFA): This is a fiber amplifier that uses erbium-doped fiber as the gain medium. The working principle of EDFA is that an optical signal is injected into the erbium-doped fiber by a laser. When the optical signal passes through the erbium-doped fiber, the erbium element absorbs photons and jumps to a higher energy level, and then releases the energy through spontaneous emission, thereby amplifying the optical signal.

[0064] A semiconductor optical amplifier (SOA) is an optical device based on semiconductor materials that amplifies and enhances the intensity of an input optical signal. The SOA works by utilizing the photon-generating effect of electron-hole recombination in the semiconductor material. The input optical signal interacts with the photons generated by electron-hole recombination, thereby amplifying the signal. Because SOAs do not require a pump source and both sides of the device are coated with anti-reflective coatings, they are insensitive to the direction of the optical path, facilitating bidirectional amplification.

[0065] Fiber optic circulators (FOCs) are multi-port optical devices with non-reciprocal characteristics. When an optical signal is input from any port, it can be output from the next port with very little loss in the numerical order shown in the diagram. However, the loss from that port to all other ports is very large, making them disconnected ports.

[0066] For example, Figure 1 This is a schematic diagram of an optical circulator. Figure 1As shown, 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 not from port 1. Correspondingly, an optical signal input from port 3 cannot be output from either port 1 or port 2. Therefore, the circulator also isolates the optical path, preventing backlight interference. It should be understood that... Figure 1 The examples shown are merely illustrative and are not intended to limit the scope of this application.

[0067] The following description is provided to facilitate understanding of the embodiments of this application.

[0068] First, in the embodiments of this application shown below, the terms "first," "second," "third," "fourth," and various numerical designations are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. For example, distinguishing different states of optical signals after different steps, etc.

[0069] Second, in the embodiments of this application shown below, the various optical elements are connected by optical fibers. Specifically, the input or output pigtails of each element and the transmission optical fiber together constitute a section of optical fiber, which is used for the transmission of signal light between the elements.

[0070] Third, in the embodiments of this application shown below, "and / or" can be used to describe three relationships between associated objects. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Where A and B can be singular or plural.

[0071] Fourth, in the embodiments of this 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.

[0072] The embodiments provided in this application are described below with reference to the accompanying drawings.

[0073] Figure 2 A schematic structural diagram of an optical amplifier module 200 provided in an embodiment of this application is shown below. Figure 2 As shown, the optical amplifier module may include a first circulator 210, an optical amplifier 220, and a second circulator 230.

[0074] The optical amplifier 220 is connected to both the first circulator 210 and the second circulator 230. Specifically, one end of the optical amplifier 220 is connected to one port of the first circulator 210, and the other end is connected to one port of the second circulator 230. The optical amplifier 220 amplifies the intensity of the first signal light input from the first circulator 210 to obtain a second signal light, and outputs the second signal light to the second circulator 230. Furthermore, the optical amplifier 220 also amplifies the intensity of the third signal light input from the second circulator 230 to obtain a fourth signal light, and outputs the fourth signal light to the first circulator 210.

[0075] In one possible implementation, the optical amplifier 220 described above is a semiconductor optical amplifier. A description of semiconductor optical amplifiers can be found above and will not be repeated here.

[0076] Optionally, in one possible implementation, the optical amplifier module 200 may further include a first conversion module 240 and a second conversion module 250, for example, Figure 3 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application.

[0077] like Figure 3 As shown, the first conversion module 240 is connected to the first circulator 210 and is used to combine N input signal lights into one first signal light and output the first signal light to the first circulator 210. The second conversion module 250 is connected to the second circulator 230 and is used to separate the second signal light input from the optical amplifier 220 to the second circulator 230 into M fifth signal lights, and then output the M fifth signal lights.

[0078] Furthermore, the second conversion module 250 is also used to combine the input M sixth signal lights into a third signal light, and output the third signal light to the second circulator 230. The first conversion module 240 is also used 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.

[0079] The following is combined Figure 4 The connection relationships of the first conversion module 240, the first circulator 210 and the optical amplifier 220, as well as the connection relationships of the second conversion module 250, the second circulator 230 and the optical amplifier 220, are explained.

[0080] like Figure 4As shown, 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 to one end of the first conversion module 240, and the second port is connected to 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 to one end of the second conversion module 250, and the fifth port is connected to the other end of the optical amplifier 220.

[0081] Specifically, in combination Figure 3 and Figure 4 The first conversion module 240 combines the received N signal beams into a single first signal beam and outputs it. The first circulator 210 receives the first signal beam output by the first conversion module 240 through its first port, and then outputs the first signal beam to the optical amplifier 220 through its second port. The optical amplifier 220 amplifies the intensity of the first signal beam to obtain a second signal beam and outputs it. The second circulator 230 receives the second signal beam through its fifth port, and further, the second circulator 230 outputs the second signal beam to the second conversion module 250 through its fourth port. After receiving the second signal beam, the second conversion module 250 decomposes it into M fifth signal beams and outputs them.

[0082] Correspondingly, the second conversion module 250 combines the received M sixth signal beams into a single third signal beam and outputs it. The second circulator 230 receives the third signal beam through its sixth port and then outputs it to the optical amplifier 220 through its fifth port. The optical amplifier 220 amplifies the intensity of the third signal beam to obtain a fourth signal beam and outputs it. The first circulator 210 receives the fourth signal beam through its second port and further outputs it to the first conversion module 240 through its third port. After receiving the fourth signal beam, the first conversion module 240 decomposes it into N seventh signal beams and outputs them.

[0083] It should be understood that Figure 4 The examples shown are merely illustrative and are not intended to limit the scope of this application.

[0084] It should be noted that the first conversion module 240 and the second conversion module 250 mentioned above are both wavelength division multiplexing modules, and it should be understood that this application does not impose any restrictions on them.

[0085] It should also be noted that, in this application, the N signal lights received by the first conversion module 240 come from N first transceiver modules, and the second conversion module 250 outputs the separated M fifth signal lights to the M second transceiver modules. Correspondingly, the M sixth signal lights received by the second conversion module 250 come from the M second transceiver modules, and the first conversion module 240 outputs the separated N seventh signal lights to the N first transceiver modules.

[0086] That is to say, in one possible implementation, the amplifier module described above may also include: N first transceiver modules and M second transceiver modules.

[0087] Figure 5 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application. (See diagram below.) Figure 5 As shown, the optical amplifier module may further include: N first transceiver modules (e.g., 261 to 26n) and M second transceiver modules (e.g., 271 to 27m).

[0088] Among them, N first transceiver modules are connected to the other end of the first conversion module 240 and are used to output 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. Alternatively, the N first transceiver modules can also be used to receive 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 of the N first transceiver modules.

[0089] M second transceiver modules are connected to the other end of the second conversion module 250 and are used to receive M fifth signal lights separated by the second conversion module 250. That is to say, the second conversion module 250 outputs a fifth signal light to each of the M second transceiver modules; or, the M second transceiver modules are used to output M sixth signal lights to the second conversion module 250. That is to say, each second transceiver module outputs a sixth signal light to the second conversion module 250.

[0090] It should be noted that in this application, N and M are both integers greater than or equal to 2.

[0091] For example, in one possible implementation, N can be equal to M, that is, the number of the first transceiver module and the second transceiver module are the same.

[0092] If the number of the first transceiver module and the second transceiver module are the same, 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, in other words, 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.

[0093] For example, in one possible implementation, N may not be equal to M, that is, the number of the first transceiver module and the second transceiver module are different.

[0094] For example, if N is greater than M, meaning the number of the first transceiver modules is greater than the number of the second transceiver modules, it also 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. Alternatively, 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.

[0095] For example, if N is less than M, meaning the number of the first transceiver modules is less than the number of the second transceiver modules, it also 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, in other words, 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.

[0096] It should also be noted that, in one possible implementation, the first transceiver module and the second transceiver module can be integrated transceiver modules, meaning that both modules simultaneously have the function of receiving and transmitting signal light; or, in another possible implementation, the first transceiver module and the second transceiver module can be modules consisting of an independent receiving module and an independent transmitting module coupled together. It should be understood that this application does not impose any limitations on these aspects.

[0097] Optionally, in one possible implementation, the optical amplifier module 200 may further include a third conversion module, a fourth conversion module, a fifth conversion module, and a sixth conversion module. For example... Figure 6 As shown, Figure 6 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application.

[0098] The optical amplifier module 200 may 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 to the first circulator 210, and the fourth conversion module 290 and the fifth conversion module 2100 are connected to the second circulator 230.

[0099] Specifically, the third conversion module 280 is used to merge the N input signal lights into a first signal light and output the first signal light to the first circulator 210. The fourth conversion module 290 is used 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.

[0100] Furthermore, the fifth conversion module 2100 is used to combine the input M sixth signal lights into a third signal light and output the third signal light to the second circulator 230. The sixth conversion module 2110 is used to separate the fourth signal light input from the first circulator 210 into N seventh signal lights and output the N seventh signal lights.

[0101] The following is combined Figure 7 The connection relationships between the third conversion module 280, the first circulator 210, the sixth conversion module 2110 and the optical amplifier 220, as well as the connection relationships between the fourth conversion module 290, the fifth conversion module 2100, the second circulator 230 and the optical amplifier 220, are explained.

[0102] like Figure 7 As shown, the first circulator 210 includes a first port, a second port, and a third port. The first port is connected to one end of the third conversion module 280, the second port is connected to one end of the optical amplifier 220, and the third port is connected to one end of the sixth conversion module 2110. The second circulator 230 includes a fourth port, a fifth port, and a sixth port. The fourth port is connected to one end of the fourth conversion module 290, the fifth port is connected to the other end of the optical amplifier 220, and the sixth port is connected to one end of the fifth conversion module 2100.

[0103] Specifically, in combination Figure 6 and Figure 7 The third conversion module 280 combines the received N signal beams into a first signal beam and outputs it. The first circulator 210 receives the first signal beam output by the third conversion module 280 through its first port. Subsequently, the first circulator 210 outputs the first signal beam to the optical amplifier 220 through its second port. The optical amplifier 220 amplifies the intensity of the first signal beam to obtain a second signal beam and outputs it. The second circulator 230 receives the second signal beam through its fifth port. Further, the second circulator 230 outputs the second signal beam to the fourth conversion module 290 through its fourth port. After receiving the second signal beam, the fourth conversion module 290 decomposes it into M fifth signal beams and outputs them.

[0104] Correspondingly, the fifth conversion module 2100 combines the received M sixth signal beams into a single third signal beam and outputs it. The second circulator 230 receives the third signal beam through its sixth port and then outputs it to the optical amplifier 220 through its fifth port. The optical amplifier 220 amplifies the intensity of the third signal beam to obtain a fourth signal beam and outputs it. The first circulator 210 receives the fourth signal beam through its second port and further outputs it to the sixth conversion module 2110 through its third port. After receiving the fourth signal beam, the sixth conversion module 2110 decomposes it into N seventh signal beams and outputs them.

[0105] It should be understood that Figure 7 The examples shown are merely illustrative and are not intended to limit the scope of this application.

[0106] 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 mentioned above are wavelength division multiplexing modules, and it should be understood that this application does not impose any restrictions on them.

[0107] It should also be noted that, in this application, the N signal lights received by the third conversion module 280 come from N third transceiver modules, and the fourth conversion module 290 outputs the separated M fifth signal lights to the M fourth transceiver modules. Correspondingly, the M sixth signal lights received by the fifth conversion module 2100 come from the M fourth transceiver modules, and the sixth conversion module 2110 outputs the separated N seventh signal lights to the N third transceiver modules.

[0108] That is to say, in one possible implementation, the amplifier module described above may also include: N third transceiver modules and M fourth transceiver modules.

[0109] Figure 8 This is a schematic structural diagram of an optical amplifier module 200 provided in another embodiment of this application. (See diagram below.) Figure 8 As shown, the optical amplifier module 200 may further include: N third transceiver modules (e.g., 2121 to 212n) and M fourth transceiver modules (e.g., 2131 to 213m).

[0110] Among them, the N third transceiver modules are connected to the other end of the third conversion module 280 and the sixth conversion module 2110, and are used to output N signal lights to the third conversion module 280. That is to say, each third transceiver module outputs one signal light to the third conversion module 280; or, the N third transceiver modules can also be used to receive the N seventh signal lights separated by the sixth conversion module 2110. That is to say, the sixth conversion module 2110 outputs one seventh signal light to each of the N third transceiver modules.

[0111] M fourth transceiver modules are connected to the other end of the fourth conversion module 290 and the fifth conversion module 2100, and are used to receive M fifth signal lights separated by the fourth conversion module 290. That is to say, the fourth conversion module 290 outputs one fifth signal light to each of the M fourth transceiver modules; or, the M fourth transceiver modules are used to output M sixth signal lights to the fifth conversion module 2100. That is to say, each fourth transceiver module outputs one sixth signal light to the fifth conversion module 2100.

[0112] It should be noted that in this application, N and M are both integers greater than or equal to 2.

[0113] For example, in one possible implementation, N can be equal to M, meaning that the number of the third transceiver module and the fourth transceiver module are the same.

[0114] If the number of third and fourth transceiver modules is the same, 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, in other words, 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.

[0115] For example, in one possible implementation, N may not be equal to M, that is, the number of the third transceiver module and the fourth transceiver module may be different.

[0116] For example, if N is greater than M, meaning the number of third transceiver modules is greater than the number of fourth transceiver modules, it also means that the number of signal lights input to the third conversion module 280 is greater than the number of fifth signal lights output by the fourth conversion module 290. Or, in other words, the number of sixth signal lights input to the fifth conversion module 2100 is less than the number of seventh signal lights output by the sixth conversion module 2110.

[0117] For example, if N is less than M, that is, the number of third transceiver modules is less than the number of fourth transceiver modules, it also means that the number of signal lights input to the third conversion module 280 is less than the number of fifth signal lights output by the fourth conversion module 290. Or, in other words, the number of sixth signal lights input to the fifth conversion module 2100 is greater than the number of seventh signal lights output by the sixth conversion module 2110.

[0118] It should also be noted that, in one possible implementation, the third and fourth transceiver modules can be integrated transceiver modules, meaning that both modules simultaneously have the function of receiving and transmitting signal light; or, in another possible implementation, the third and fourth transceiver modules can be modules that are independent receiving modules and independent transmitting modules coupled together. It should be understood that this application does not impose any limitations on this.

[0119] It should also be noted that, in one scenario, the wavelengths of the N signal lights, M fifth signal lights, M sixth signal lights, and N seventh signal lights mentioned above are completely different. Alternatively, in another scenario, the wavelengths of the N signal lights, M fifth signal lights, M sixth signal lights, and N seventh signal lights mentioned above are partially different.

[0120] This application also provides an optical amplifier system, which includes the first circulator 210, optical amplifier 220, second circulator 230, first conversion module 240, and second conversion module 250 described above. Optionally, the optical amplifier system may also include other optical components.

[0121] This application also provides an optical amplifier system, which includes the first circulator 210, optical amplifier 220, second circulator 230, third conversion module 280, fourth conversion module 290, fifth conversion module 2100, and sixth conversion module 2110 described above. Optionally, the optical amplifier system may also include other optical components.

[0122] This application also provides an optical fiber communication system, which includes the first circulator 210, optical amplifier 220, second circulator 230, first conversion module 240, second conversion module 250, N first transceiver modules, and M second transceiver modules as described above. Optionally, the optical fiber communication system may also include other optical components.

[0123] This application also provides an optical fiber communication system, which includes the first circulator 210, optical amplifier 220, second circulator 230, third conversion module 280, fourth conversion module 290, fifth conversion module 2100, sixth conversion module 2110, N third transceiver modules, and M fourth transceiver modules as described above. Optionally, the optical fiber communication system may also include other optical components.

[0124] According to the technical solution provided in this application, the signal light transmitted in both directions can pass through the same optical amplifier, which greatly reduces the number of devices, thereby achieving uniform amplification of bidirectional links while saving device costs and simplifying the system structure.

[0125] The following is combined Figure 9 The optical communication method provided in the embodiments of this application will be described.

[0126] Figure 9 A schematic flowchart of an optical communication method 900 provided in an embodiment of this application is shown below. Figure 9 As shown, the method may include at least the following steps.

[0127] S910, the first circulator outputs the first signal light to the optical amplifier, and correspondingly, the optical amplifier receives the first signal light.

[0128] Optionally, before step S910, the method may further include: a first circulator receiving a first signal light.

[0129] In one 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 them into a first signal light, which is then output to the first circulator. Optionally, the first conversion module receives N signal lights output from a first transceiver module.

[0130] In one 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 them into a first signal light, which is then output to the first circulator. Optionally, the third conversion module receives N signal lights output from a third transceiver module.

[0131] S920, the optical amplifier amplifies the intensity of the first signal light to obtain the second signal light.

[0132] Alternatively, in one possible implementation, the optical amplifier is a semiconductor optical amplifier.

[0133] S930, the optical amplifier outputs the second signal light to the second circulator, and correspondingly, the second circulator receives the second signal light.

[0134] Optionally, after step S930, the method may further include: the second circulator outputting a second signal light.

[0135] In one possible implementation, the second circulator outputs a 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 for output. Optionally, the second conversion module outputs the M fifth signal lights to M second transceiver modules.

[0136] In one possible implementation, the second circulator outputs a 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 for output. Optionally, the fourth conversion module outputs the M fifth signal lights to M fourth transceiver modules.

[0137] S940, the second circulator outputs the third signal light to the optical amplifier, and the optical amplifier receives the third signal light accordingly.

[0138] Optionally, before step S940, the method may further include: the second circulator receiving the third signal light.

[0139] In one 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 them into a single third signal light, and outputs it. Optionally, the second conversion module receives M sixth signal lights output from the second transceiver module.

[0140] In one 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 a single third signal light, and outputs it. Optionally, the fifth conversion module receives M sixth signal lights output from the fourth transceiver module.

[0141] S950, the optical amplifier amplifies the intensity of the third signal light to obtain the fourth signal light.

[0142] S960, the optical amplifier outputs the fourth signal light to the first circulator, and correspondingly, the first circulator receives the fourth signal light.

[0143] Optionally, after step S960, the method may further include: the first circulator outputting a fourth signal light.

[0144] In one possible implementation, the first circulator outputs a 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 them. Optionally, the first conversion module outputs N seventh signal lights to N first transceiver modules respectively.

[0145] In one possible implementation, the first circulator outputs a 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 them. Optionally, the sixth conversion module outputs N seventh signal lights to N third transceiver modules respectively.

[0146] It should be noted that the first to sixth transformation modules mentioned above are all wavelength division multiplexing modules, and it should be understood that this application does not impose any restrictions on them.

[0147] It should be noted that in this application, N and M are both integers greater than or equal to 2.

[0148] For example, in one possible implementation, N can be equal to M, that is, the number of the first transceiver module and the second transceiver module are the same.

[0149] For example, in one possible implementation, N may not be equal to M, that is, the number of the first transceiver module and the second transceiver module are different.

[0150] It should also be noted that, in one scenario, the wavelengths of the N signal lights, M fifth signal lights, M sixth signal lights, and N seventh signal lights mentioned above are completely different. Alternatively, in another scenario, the wavelengths of the N signal lights, M fifth signal lights, M sixth signal lights, and N seventh signal lights mentioned above are partially different.

[0151] According to the above technical solution, the signal light transmitted in both directions can pass through the same optical amplifier, which greatly reduces the number of devices. Thus, while achieving uniform amplification of the bidirectional link, it saves device costs and simplifies the system structure.

[0152] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0153] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0154] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0155] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0156] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0157] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0158] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the 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 one 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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