Equalizer device, amplifier and communication system

Abstract

The utility model relates to the technical field of communication, in particular to an equalizer device, an amplifier and a communication system, and the equalizer device comprises a first selection assembly, a second selection assembly and a plurality of equalization assemblies. The ith equalization component is connected between the ith output end of the first selection component and the ith input end of the second selection component; the first selection assembly and the second selection assembly are used for selectively connecting transmission light paths between the first selection assembly and the second selection assembly and the corresponding balancing assemblies so as to receive transmission light and output the transmission light after the transmission light passes through the balancing assemblies; wherein each balancing assembly is used for carrying out spectrum balancing on optical fibers of different types and / or different lengths. According to the utility model, the plurality of equalization assemblies, the first selection assembly and the second selection assembly are used together to form the equalizer device, so that the equalizer device is suitable for optical fibers of various types and / or various lengths to meet the application requirements of various optical fibers.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to an equalizer device, an amplifier, and a communication system. Background Technology

[0002] With the rapid development of the internet across various industries and the rise of technologies such as cloud computing and the Internet of Things, data traffic is experiencing explosive growth. Traditional C-band communication systems can no longer meet people's bandwidth demands. Currently, communication bandwidth is expanding towards the L-band. However, when C-band and L-band signals are transmitted simultaneously in a single optical fiber, a strong Raman effect occurs, manifesting as absorption of C-band optical power, enhanced L-band optical power, and extremely uneven spectrum. After long-distance transmission, the uneven spectrum leads to a decrease in system performance at the receiver end.

[0003] To achieve spectral flatness, existing technologies often incorporate equalizers into communication systems. However, in practical applications, different fiber types and lengths can produce different spectral lines under the same amplifier, making it difficult for a single equalizer to meet the application requirements of various fiber types. During the setup of actual communication systems, maintenance personnel need to accurately install the equalizers required for each transmission segment. Incorrect installation can affect the overall performance of the communication system, placing higher demands on maintenance personnel. Utility Model Content

[0004] The present invention provides an equalizer device, an amplifier, and a communication system to solve the problem that a single equalizer cannot meet the application requirements of multiple optical fibers.

[0005] This utility model is implemented as follows:

[0006] In a first aspect, this utility model provides an equalizer device, including a first selection component 1, a second selection component 2, and a plurality of equalization components;

[0007] The i-th equalization component 3-i is connected between the i-th output terminal of the first selection component 1 and the i-th input terminal of the second selection component 2;

[0008] The first selection component 1 and the second selection component 2 are used to selectively connect the transmission optical path with the corresponding equalization component to receive the transmission light and output the transmission light after passing through the equalization component; wherein, each equalization component is used to perform spectral equalization on optical fibers of different types and / or different lengths.

[0009] Preferably, the different types of optical fibers include one or more of G.652 optical fiber, Leaf optical fiber, Truewave optical fiber, and G.654 optical fiber.

[0010] Preferably, the first selection component 1 and the second selection component 2 are optical switches.

[0011] Secondly, this utility model also provides an amplifier, including a multiplexer assembly 4, multiple amplification assemblies, and the equalizer device described in the first aspect;

[0012] The output of the j-th amplification component 5-j is connected to the j-th input of the multiplexing component 4;

[0013] The output of the multiplexing component 4 is connected to the input of the equalizer device, and the output of the equalizer device is used to connect to the transmission optical fiber.

[0014] Each amplification component is used to amplify input light of different wavelengths to obtain transmitted light, and the equalizer device is used to perform spectral equalization on the transmitted light.

[0015] Preferably, it also includes a wavelength division multiplexing (WDM) component 6;

[0016] The j-th output terminal of the wavelength division component 6 is connected to the input terminal of the j-th amplification component 5-j, so as to divide the transmitted light of the previous transmission unit into different wavelengths of input light, and transmit the different wavelengths of input light to the corresponding amplification components for optical amplification.

[0017] Preferably, the different wavelengths include one or more of the C-band, L-band, U-band, S-band, E-band, and O-band.

[0018] Preferably, the plurality of amplification components include a first amplification component 51 and a second amplification component 52;

[0019] The first amplification component 51 is used to optically amplify the input light of the first wavelength;

[0020] The second amplification component 52 is used to optically amplify the input light of the second wavelength.

[0021] Preferably, the first wavelength is the C-band and the second wavelength is the L-band.

[0022] Thirdly, a communication system is also provided, comprising multiple transmission units, each transmission unit including the amplifier and transmission optical fiber described in the second aspect.

[0023] The equalizer device contains N equalization components; each equalization component is used to perform spectral equalization on a transmission fiber of the corresponding type and length.

[0024] in, L p This represents the number of transmission optical fibers of different lengths of the p-th type used in the communication system.

[0025] Compared with the prior art, the advantages of this utility model are as follows: This utility model uses multiple equalization components, a first selection component and a second selection component to build an equalizer device, so that the equalizer device is applicable to various types and / or lengths of optical fibers to meet the application requirements of various optical fibers. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of an equalizer device provided in an embodiment of this utility model;

[0028] Figure 2 A schematic diagram of the structure of an amplifier provided in an embodiment of this utility model;

[0029] Figure 3 A schematic diagram of the structure of an amplifier provided in an embodiment of this utility model;

[0030] Figure 4 A schematic diagram of the structure of an amplifier provided in an embodiment of this utility model;

[0031] Figure 5 A schematic diagram of the structure of a communication system provided in an embodiment of this utility model;

[0032] Figure 6 A schematic diagram of the structure of a transmission unit in a communication system provided by an embodiment of this utility model;

[0033] Figure 7 A schematic diagram of the structure of a communication system provided in an embodiment of this utility model;

[0034] Figure 8 This is a schematic diagram of an output spectrum provided for an embodiment of the present invention.

[0035] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0036] 1. First selection component; 2. Second selection component; 3-i. i-th equalization component; 4. Combining component; 5-j. j-th amplification component; 51. First amplification component; 52. Second amplification component; 6. Demultiplexing component. Detailed Implementation

[0037] In the description of this utility model, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupled" can refer to an electrical connection that enables signal transmission.

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0041] Example 1:

[0042] This utility model embodiment provides an equalizer device, such as... Figure 1 As shown, the device includes a first selection component 1, a second selection component 2, and multiple equalization components. The i-th equalization component 3-i is connected between the i-th output terminal of the first selection component 1 and the i-th input terminal of the second selection component 2. The first selection component 1 and the second selection component 2 are used to selectively connect the transmission optical path with the corresponding equalization component to receive the transmitted light and output the transmitted light after passing through the equalization component. Each equalization component is used to perform spectral equalization on optical fibers of different types and / or different lengths. The input terminal of the first selection component 1 is used as the input terminal of the equalizer device, and the output terminal of the second selection component 2 is used as the output terminal of the equalizer device.

[0043] In practical use, the first selection component 1 and the second selection component 2 are optical switches, such as 1×N mechanical optical switches or 1×N non-mechanical optical switches, where N is the number of equalization components. The equalization components are equalizers, and the design spectrum of each equalizer is pre-designed by those skilled in the art. The first selection component 1 and the second selection component 2 are used in conjunction; that is, when the first selection component 1 switches to the i-th output terminal to allow the transmitted light to be output from the i-th output terminal, the second selection component 2 must also switch to the i-th input terminal to allow the equalized transmitted light to be output from the second selection component 2, forming a complete transmission optical path. i is a positive integer, less than or equal to the number of equalization components N.

[0044] It should be noted that the different lengths referred to are actually different length intervals. In actual implementation, those skilled in the art divide a type of optical fiber into multiple length intervals, such as 100m intervals as a length interval, forming multiple length intervals such as 1~100m, 101~200m, ..., 1+100k~200k+100m, etc., and each length interval corresponds to an equalizer.

[0045] In specific application scenarios, each equalizer is pre-designed by those skilled in the art. Specifically, this includes: pre-collecting the unequalized spectra of each transmitted light in the communication system under commonly used lengths and types of transmission optical fibers, normalizing the spectra to obtain the design spectral lines of the corresponding lengths and types of transmission optical fibers, and using the design spectral lines to design the corresponding equalizer.

[0046] The different types of optical fibers include one or more of G.652 fiber, Leaf fiber, Truewave fiber, and G.654 fiber.

[0047] This embodiment uses multiple equalization components, a first selection component 1, and a second selection component 2 to construct an equalizer device, thereby making the equalizer device applicable to various types and / or lengths of optical fibers to meet the application requirements of various optical fibers.

[0048] Example 2:

[0049] Based on Embodiment 1, this embodiment also provides an amplifier, such as... Figure 2As shown, the device includes multiple amplification components, a multiplexer component 4, and the equalizer device described in Embodiment 1. The output of the j-th amplification component 5-j is connected to the j-th input of the multiplexer component 4. The output of the multiplexer component 4 is connected to the input of the equalizer device, and the output of the equalizer device is used to connect to the transmission optical fiber. That is, the output of the equalizer device serves as the output of the amplifier described in this embodiment. The amplification component can be an amplifier, such as an erbium-doped fiber amplifier (EDFA). j is a positive integer, and j is less than or equal to the number of different wavelengths of light to be transmitted.

[0050] Each amplification component is used to amplify input light of different wavelengths to obtain transmitted light, and the equalizer device is used to perform spectral equalization on the transmitted light. Among them, the wave combiner component 4 is used to combine the transmitted light of each wavelength after being amplified by the amplification components into a single beam, so that the transmitted light of each wavelength enters a single equalizer device.

[0051] The design spectral lines of each equalization component in the equalizer device are obtained by normalizing the output spectrum of the transmission optical fiber connected to the amplifier output.

[0052] This embodiment reduces the differential loss of the entire circuit containing the amplifier by placing the equalizer device in each amplifier, thus avoiding the increase in differential loss caused by spectral equalization.

[0053] In practical use, such as Figure 3 As shown, the amplifier in this embodiment also includes a wavelength division component 6; the j-th output terminal of the wavelength division component 6 is connected to the input terminal of the j-th amplification component 5-j, so as to divide the transmitted light of the previous transmission unit into different wavelengths of input light, and transmit the different wavelengths of input light to the corresponding amplification component for optical amplification.

[0054] In one alternative implementation, the different wavelengths include one or more of the C-band, L-band, U-band, S-band, E-band, and O-band.

[0055] In a specific application scenario, such as Figure 4 As shown, the plurality of amplification components include a first amplification component 51 and a second amplification component 52; the first amplification component 51 is used to optically amplify input light of a first wavelength; the second amplification component 52 is used to optically amplify input light of a second wavelength. The first wavelength is a C-band, and the second wavelength is an L-band.

[0056] Example 3:

[0057] Based on Embodiment 2, this embodiment also provides a communication system, such as Figure 5 and Figure 6 As shown, it includes multiple transmission units, each of which includes the amplifier and transmission optical fiber described in Embodiment 2; the transmission optical fibers of each transmission unit are connected sequentially. Wherein, Figure 6 for Figure 5 A schematic diagram of the transmission unit in the middle.

[0058] In one optional implementation, the equalizer device includes N equalization components; each equalization component is used to perform spectral equalization on a transmission optical fiber of a corresponding type and length; wherein, L p N represents the number of transmission optical fibers of different lengths and types used in the communication system. In other words, N is the total number of transmission optical fibers of different types and lengths in the communication system.

[0059] For example, if a communication system uses G.652 and G.654 optical fibers, with G.652 fibers having lengths of 401–500 m and 601–700 m, and G.654 fibers having lengths of 301–400 m and 801–900 m, then N = 4. This corresponds to 4 equalization components in the equalizer device, which has four transmission paths. Assuming the equalization component in the first transmission path is used for spectral equalization of the 401–500 m G.652 fiber, and the equalization component in the second transmission path is used for spectral equalization of the 601–700 m G.652 fiber, then... The equalization component in the third transmission path is used to perform spectral equalization on G.654 optical fibers with a length of 301-400m, and the equalization component in the fourth transmission path is used to perform spectral equalization on G.654 optical fibers with a length of 801-900m. Therefore, when actually setting up the communication system, maintenance personnel can install an equalizer device (i.e., the equalizer device described in Example 1) on all transmission units. They only need to switch the equalizer device to the corresponding transmission path according to the type and length of the transmission optical fiber in the transmission unit, that is, switch the output path of the first selection component 1 and the input path of the second selection component 2, thereby greatly reducing the difficulty for maintenance personnel to set up the communication system.

[0060] Example 4:

[0061] This embodiment is based on the device described in Embodiments 1, 2 and 3, combined with specific application scenarios, and uses the technical descriptions in the relevant scenarios to illustrate the implementation process of the features of this utility model in the scenario.

[0062] like Figure 7As shown, this embodiment provides a device (i.e., a transmission unit) for equalizing the spectral flatness of a C+L optical transmission system, which includes an amplifier module (i.e., an amplifier for the C-band and an amplifier for the L-band), an equalizer device, and various types of optical fibers.

[0063] The equalizer device includes two selectors. Figure 7 The system consists of a first selector (i.e., the first selection component 1), a second selector (the second selection component 2), and N equalizers.

[0064] The two selectors are used in pairs to select a specific equalizer. Equalizers 1 through n are designed specifically for optical fibers and require matching optical fibers for use. The equalizers can be integrated into the optical amplifier (OA) to optimize system performance.

[0065] In practical applications, the design method for the design curves of each equalizer includes: setting C-band OA and L-band OA to enter the same optical fiber as the incident light source, allowing the combined light from the C and L bands to pass through the fiber, recording the gain spectrum after passing through the fiber, calculating the output spectrum after passing through the fiber, and normalizing the spectrum to obtain the design spectral line of equalizer 1. Depending on the type and length of the optical fiber, the design curves for equalizer 2, equalizer 3, ..., equalizer n can be obtained by following the above steps.

[0066] It should be noted that, for the sake of clarity in the accompanying drawings, Figure 7 The split-wave assembly 6 and the multiplexing assembly 4 are not shown, but this does not mean that they do not exist.

[0067] In practical applications, different equalizers can be selected based on the specific fiber type and length to achieve equalization, resulting in a flat output spectrum that eliminates the Raman effect after passing through the fiber.

[0068] The device for equalizing the spectral flatness of the C+L optical transmission system described in this embodiment was used to test the following: Figure 8 As shown, the output spectrum after passing through the OA, equalizer device, and optical fiber in sequence is much flatter than that of the structure passing through only the OA and optical fiber. It can be concluded that the devices for equalizing the spectral flatness of the C+L optical transmission system described in this embodiment all have good spectral equalization effects. Among them, Figure 8 The OA output spectrum is the spectrum that only passes through the OA, the OA+fiber output spectrum is the spectrum that passes through both the OA and the fiber, and the OA+compensator+fiber output spectrum is the spectrum that passes through the OA, equalizer, and fiber.

[0069] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An equalizer apparatus, characterized by, The equalizer device comprises a first selection component (1), a second selection component (2) and a plurality of equalization components; An ith equalization component (3-i) is connected between an ith output end of the first selection component (1) and an ith input end of the second selection component (2); The first selection component (1) and the second selection component (2) are configured to selectively connect a transmission light path between the corresponding equalization component to receive transmission light and output the transmission light after passing through the equalization component; wherein each equalization component is configured to perform spectral equalization on optical fibers of different types and / or different lengths.

2. The equalizer apparatus of claim 1, wherein The different types of optical fibers include one or more of G.652 optical fibers, Leaf optical fibers, Truewave optical fibers and G.654 optical fibers.

3. The equalizer apparatus of claim 1, wherein The first selection component (1) and the second selection component (2) are optical switches.

4. An amplifier characterized by, The equalizer device comprises a first selection component (1), a second selection component (2) and a plurality of equalization components; An ith equalization component (3-i) is connected between an ith output end of the first selection component (1) and an ith input end of the second selection component (2); The first selection component (1) and the second selection component (2) are configured to selectively connect a transmission light path between the corresponding equalization component to receive transmission light and output the transmission light after passing through the equalization component; wherein each equalization component is configured to perform spectral equalization on optical fibers of different types and / or different lengths. The equalizer device comprises a first selection component (1), a second selection component (2) and a plurality of equalization components; 5. The amplifier of claim 4, wherein, An ith equalization component (3-i) is connected between an ith output end of the first selection component (1) and an ith input end of the second selection component (2); The first selection component (1) and the second selection component (2) are configured to selectively connect a transmission light path between the corresponding equalization component to receive transmission light and output the transmission light after passing through the equalization component; wherein each equalization component is configured to perform spectral equalization on optical fibers of different types and / or different lengths.

6. The amplifier of claim 4, wherein, The different types of optical fibers include one or more of G.652 optical fibers, Leaf optical fibers, Truewave optical fibers and G.654 optical fibers.

7. The amplifier of claim 4, wherein, The first selection component (1) and the second selection component (2) are optical switches. The equalizer device comprises a first selection component (1), a second selection component (2) and a plurality of equalization components; An ith equalization component (3-i) is connected between an ith output end of the first selection component (1) and an ith input end of the second selection component (2); 8. The amplifier of claim 7, wherein, The first selection component (1) and the second selection component (2) are configured to selectively connect a transmission light path between the corresponding equalization component to receive transmission light and output the transmission light after passing through the equalization component; wherein each equalization component is configured to perform spectral equalization on optical fibers of different types and / or different lengths.

9. A communication system, characterized by The different types of optical fibers include one or more of G.652 optical fibers, Leaf optical fibers, Truewave optical fibers and G.654 optical fibers.

10. The communication system of claim 9, wherein, The first selection component (1) and the second selection component (2) are optical switches. The equalizer device comprises a first selection component (1), a second selection component (2) and a plurality of equalization components; An ith equalization component (3-i) is connected between an ith output end of the first selection component (1) and an ith input end of the second selection component (2); The first selection component (1) and the second selection component (2) are configured to selectively connect a transmission light path between the corresponding equalization component to receive transmission light and output the transmission light after passing through the equalization component; wherein each equalization component is configured to perform spectral equalization on optical fibers of different types and / or different lengths. The different types of optical fibers include one or more of G.652 optical fibers, Leaf optical fibers, Truewave optical fibers and G.654 optical fibers. The first selection component (1) and the second selection component (2) are optical switches. The equalizer device comprises a first selection component (1), a second selection component (2) and a plurality of equalization components; An ith equalization component (3-i) is connected between an ith output end of the first selection component (1) and an ith input end of the second selection component (2); The first selection component (1) and the second selection component (2) are configured to selectively connect a transmission light path between the corresponding equalization component to receive transmission light and output the transmission light after passing through the equalization component; wherein each equalization component is configured to perform spectral equalization on optical fibers of different types and / or different lengths. The different types of optical fibers include one or more of G.652 optical fibers, Leaf optical fibers, Truewave optical fibers and G.654 optical fibers. The first selection component (1) and the second selection component (2) are optical switches. wherein , is the number of transmission fibers of the pth type used in the communication system and of different lengths.

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