Optical dividing apparatus and optical dividing system
Patent Information
- Application Number
- ES2025090033U
- Authority / Receiving Office
- ES · ES
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2023-05-31
- Filing Date
- 2024-01-02
- Publication Date
- 2026-08-10
- Estimated Expiration
- 2034-01-02
AI Technical Summary
In optical distribution networks, the number of spectroscopic devices connected to single-core optical cables is limited, resulting in high user density and excessive number of optical cables in multi-operator scenarios, increasing costs and construction difficulty.
Design a multi-core interface spectroscopy device, and use equal or unequal spectroscopy to distribute optical signals, reduce the number of optical cables in the distribution segment, and allow multiple operators to share different optical fibers in the same multi-core optical cable, reducing construction Difficulty.
It effectively reduces the number of optical cables in the wiring section, reduces the cost and construction difficulty, and improves the flexibility and efficiency of the spectroscopy system.
Smart Images
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Abstract
Description
Spectral device and spectroscopic system
[0001] This application claims priority to Chinese patent application No. 202321382138.3 filed on May 31, 2023, with utility model name “Spectrometer and Spectrometer System”, the entire contents of which are incorporated herein by reference. Technical Field
[0002] The present application relates to the field of optical communication technology, and in particular to a spectrometer and a spectrometer system. Background Art
[0003] The optical distribution network (ODN) provides physical optical transmission channels between the optical line terminal (OLT) and the optical network terminal (ONT). In an ODN, it is often necessary to split the optical fibers in the optical cable to cover more users.
[0004] In related technologies, optical signals from the OLT pass through the optical distribution frame (ODF), the splitting and splicing closure (SSC), the optical splitting system, and the access terminal box (ATB) before reaching the ONT. The optical splitting system is connected to the SSC via a single-core optical cable and consists of at least two optical splitters cascaded via the single-core cable.
[0005] A single-core optical cable can only connect a limited number of optical splitters, and each splitter can also connect a limited number of ONTs. Therefore, in scenarios with high user density, the number of distribution segment optical cables (i.e., the single-core optical cables between the splitter system and the SSC) and the number of optical splitters must be increased to meet the required user volume. In scenarios with multiple operators, since different operators require different distribution segment optical cables, the number of distribution segment optical cables is relatively large. This large number of distribution segment optical cables increases costs and construction complexity.
[0006] Utility Model Content
[0007] The present application provides a splitter device and a splitter system, which can reduce the number of optical cables in a distribution section, thereby reducing costs and lowering construction difficulty.
[0008] In the first aspect, the present application provides a splitter device. The splitter device can be a fiber optic cable junction box, a fiber access terminal (FAT), a fiber optic cable splitter box, etc. The splitter device includes: a main housing, an input interface, a first output interface group and a first optical splitter. The input interface is connected to the main housing, and the input interface is a multi-core interface and includes X output ends, where X is an integer and greater than 1. The input end of the input interface is used to connect to a multi-core optical cable. For example, the input end of the input interface is connected to a multi-core optical cable through an optical fiber connector. The first output interface group includes a plurality of first output interfaces, and the first output interface is connected to the main housing. The first output interface is used to connect to a home optical cable. The first optical splitter is located in the main housing, and the input end of the first optical splitter is connected to the first output end of the X output ends, and the first output end of the first optical splitter is connected to the first output interface.
[0009] In this application, the interface may also be referred to as a fiber optic adapter or a fiber optic connector, etc.
[0010] In the present application, the input interface of the optical splitter is a multi-core interface, which can be connected to a multi-core optical cable. For scenarios with high user density, when the number of optical splitters connected to each core of the multi-core optical cable is the same as the number of optical splitters connected to the single-core optical cable in the related art, for a fixed number of users, only a smaller number of distribution segment optical cables is required to meet the user number requirements. For scenarios with multiple operators, different operators can use different optical fibers in the same multi-core optical cable, that is, different operators can share distribution segment optical cables, thereby reducing the number of distribution segment optical cables.
[0011] It can be seen that in the above two scenarios, the number of optical cables in the distribution section is reduced, which is conducive to reducing costs and reducing construction difficulty.
[0012] In one possible implementation, the optical splitter device may include only an output interface (first output interface) for connecting to a drop optical cable, without including an output interface (second output interface) for connecting to other optical splitters. In this case, the optical splitter device is located at the end of an optical fiber link and can be referred to as an end optical splitter device.
[0013] In this application, the end-spectral splitting device can adopt any of the following five structures:
[0014] The first type is that the optical splitter device only includes the aforementioned first optical splitter without other optical splitters, and the first optical splitter is an equal-splitting optical splitter.
[0015] Optionally, the first optical splitter is a 1:N optical splitter, where N is an integer and greater than 1. N may be equal to an integer power of 2, for example, 8, 16, or 32.
[0016] The second type of optical splitter includes, in addition to the aforementioned first optical splitter, Y second optical splitters. The first optical splitter and the second optical splitter are both equal-splitting optical splitters. The second optical splitter is located in the main housing.
[0017] Optionally, the first optical splitter and the second optical splitter are both 1:N optical splitters.
[0018] In this second configuration, the optical splitter device further includes Y third output interface groups for connecting to a drop optical cable. Each third output interface group includes multiple third output interfaces, each of which is connected to the main housing. The input ends of the Y second optical splitters are respectively connected to an output end of the input interface, and the output ends of the Y second optical splitters are respectively connected to a third output interface.
[0019] By adding a second optical splitter, more optical signals can be split and provided to user terminals via a third output interface connected to the second optical splitter, allowing the optical splitting device to serve more users. Furthermore, each optical splitter (including the first and second optical splitters) can be used by different carriers. When a user needs to switch carriers, they only need to switch the output interface connected to the drop cable, which is convenient.
[0020] The third type of optical splitting device includes, in addition to the aforementioned first optical splitter, Y first connection interfaces. The Y first connection interfaces are respectively connected to one output end of the input interface. The first connection interface is a single-core interface connected to the main housing and is used to connect to the auxiliary optical splitting unit.
[0021] Fourth, in addition to the aforementioned first optical splitter, the optical splitter device further includes a second optical splitter and Y first connection interfaces, where Y is an integer and is greater than 0. The input end of the second optical splitter is connected to the first output end of the input interface, and the first output end of the second optical splitter is connected to the input end of the first optical splitter, so that the input end of the first optical splitter is connected to the first output end of the input interface through the second optical splitter, and the Y second output ends of the second optical splitter are connected to the Y first connection interfaces. The first connection interface is a single-core interface and is connected to the main housing, and is used to connect to the auxiliary optical splitter unit.
[0022] Fifth, the spectrometer includes, in addition to the components corresponding to the third or fourth structure, at least one auxiliary spectrometer unit.
[0023] In the third, fourth, and fifth configurations, the auxiliary optical splitter unit includes an auxiliary housing, a second connection interface, an extended optical splitter, and a third output interface group. The third output interface group includes a plurality of third output interfaces. The second connection interface and the third output interface are both connected to the auxiliary housing. The second connection interface is connected to the first connection interface via an optical fiber. The input end of the extended optical splitter is connected to the output end of the second connection interface, and the third output interface is connected to the output end of the extended optical splitter.
[0024] By configuring the first connection interface of the optical splitter device to connect to the auxiliary optical splitter unit, it is possible to choose whether to deploy the auxiliary optical splitter unit and the placement of the auxiliary optical splitter unit as needed, which helps to further reduce the difficulty of construction. After connecting the auxiliary optical splitter unit, the extended optical splitter and the third output interface can serve more users. In addition, each optical splitter (including the first optical splitter and the extended optical splitter) can be used by different operators. When the user needs to switch operators, he only needs to switch the output interface connected to the home optical cable, which is convenient.
[0025] In another possible embodiment, the optical splitter device includes, in addition to a first output interface for connecting to a drop optical cable, a second output interface for connecting to another optical splitter device. The second output interface is a multi-core interface connected to the main housing. The second output interface is connected to at least part of the output end of the input interface.
[0026] In an optical fiber link, such an optical splitter device may be an optical splitter device other than the optical splitter device closest to the user side among multiple cascaded optical splitters, or may be used as the optical splitter device closest to the user side.
[0027] Optionally, the optical splitting device including both the first output interface and the second output interface may adopt any one of the following five structures:
[0028] The first type, the second output interface includes X-1 first input terminals and 1 second input terminal, the other output terminals of the X output terminals except the first output terminal are respectively connected to the X-1 first input terminals, and the second input terminal is vacant.
[0029] Optionally, the terminals of the input interface and the second output interface are arranged in the same manner, and the position of the first output terminal in the input interface is different from the position of the second input terminal in the second output interface. In this way, multiple optical splitting devices in the optical splitting system can adopt the same structure, which facilitates the standardization of the optical splitting devices and reduces the difficulty of construction.
[0030] Second, in addition to the main housing, the input interface, the first optical splitter, and the first output interface, the optical splitting device further includes: Y second optical splitters and Y third output interface groups, where Y is an integer greater than 0 and less than or equal to X-1. The third output interface group includes multiple third output interfaces, each of which is connected to the main housing. The input ends of the Y second optical splitters are respectively connected to one of the X output interfaces, the first output ends of the Y second optical splitters are respectively connected to the Y third output interface groups, and the second output ends of the Y second optical splitters and the second output end of the first optical splitter are both connected to the second output interface.
[0031] Here, the first optical splitter and the Y second optical splitters are all unequal-ratio optical splitters. The number of output terminals of the first optical splitter and the number of output terminals of the second optical splitter can be the same or different. When the number of output terminals of the first optical splitter and the number of output terminals of the second optical splitter are the same, the splitting ratio of the first optical splitter and the splitting ratio of the second optical splitter can be the same.
[0032] The third type, in addition to the main housing, the input interface, the first optical splitter and the first output interface group, the optical splitter device also includes Y second optical splitters and Y first connection interfaces. Wherein, Y is an integer, Y is greater than 0 and Y is less than or equal to X-1. The first optical splitter and the Y second optical splitters are unequal-ratio optical splitters. The input ends of the Y second optical splitters are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters are respectively connected to one of the Y first connection interfaces, and the second output ends of the Y second optical splitters and the second output ends of the first optical splitter are both connected to the second output interface. The first connection interface is a single-core interface and is connected to the main housing for connecting to the auxiliary optical splitting unit.
[0033] Here, the first optical splitter and the Y second optical splitters are both unequal-split optical splitters. The number of output terminals of the first optical splitter and the number of output terminals of the second optical splitter may be different.
[0034] Fourth, in addition to the main housing, the input interface, the first optical splitter, and the first output interface group, the optical splitter device further includes a second optical splitter and Y first connection interfaces, where Y is an integer and Y is greater than 0. The input end of the second optical splitter is connected to the first output end of the input interface, and the first output end of the second optical splitter is connected to the input end of the first optical splitter, so that the input end of the first optical splitter is connected to the first output end of the input interface through the second optical splitter, and the Y second output ends of the second optical splitter are connected to the Y first connection interfaces. The first connection interface is a single-core interface and is connected to the main housing for connection to the auxiliary optical splitting unit.
[0035] Exemplarily, the first optical splitter and the expansion optical splitter are both equal-ratio optical splitters, and the number of output terminals of the first optical splitter is equal to the number of output terminals of the expansion optical splitter. In this case, the second optical splitter is an equal-ratio optical splitter of 1:(Y+1).
[0036] Fifth, the optical splitting device includes, in addition to the components of the third or fourth structure, at least one auxiliary optical splitting unit. The structure and function of the auxiliary optical splitting unit are the same as those of the aforementioned auxiliary optical splitting units and will not be described in detail here.
[0037] In a possible implementation, all interfaces connected to the main housing are located on the same side wall of the main housing.
[0038] In another possible embodiment, all interfaces connected to the main housing are located on different side walls of the main housing, for example, the input interface and the output interface are located on opposite side walls of the main housing.
[0039] In a second aspect, the present application provides a light splitting system comprising M cascaded light splitting devices, wherein two adjacent light splitting devices are connected via a multi-core optical cable.
[0040] In a first possible implementation, the M optical splitting devices include M-1 first optical splitting devices and 1 second optical splitting device. The first optical splitting device is an optical splitting device having the first structure and both first and second output interfaces, and the second optical splitting device is an end optical splitting device having the first structure.
[0041] In this embodiment, different cores of the multi-core optical cable correspond to different optical splitting devices, and an optical splitter in each optical splitting device is an equal-splitting optical splitter.
[0042] In a second possible implementation manner, the M optical splitting devices are all optical splitting devices having the aforementioned first structure and both first and second output interfaces.
[0043] In the first and second possible implementations, M is an integer, M is greater than 2, and M is less than or equal to X.
[0044] In the first and second possible implementations, for the optical signal in each core of the multi-core optical cable, it is split only by one first optical splitter and then transmitted to the user terminal device. Compared with the method of splitting the optical signal in a single core by cascading an unequal-score optical splitter and an equal-score optical splitter, the loss can be reduced.
[0045] In a third possible implementation, the M optical splitting devices include M-1 first optical splitting devices and one second optical splitting device. The first optical splitting device is an optical splitting device having the aforementioned second structure and having first and second output interfaces. The second optical splitting device is the terminal optical splitting device having the aforementioned second structure.
[0046] In a fourth possible implementation, the M optical splitting devices include M-1 first optical splitting devices and one second optical splitting device. The first optical splitting device is an optical splitting device having the third or fourth structure and having first and second output interfaces. The second optical splitting device is an end optical splitting device having the third or fourth structure.
[0047] In the third and fourth possible implementations, M is an integer and is greater than 1. The value of M is related to the energy of the optical signal in a single core of the multi-core optical cable, but is not related to the number of cores in the multi-core optical cable. Therefore, M may be greater than, equal to, or less than X. BRIEF DESCRIPTION OF THE DRAWINGS
[0048] FIG1 is a schematic diagram of the structure of an ODN provided in an embodiment of the present application;
[0049] FIG2 is a schematic structural diagram of a spectroscopic system provided in an embodiment of the present application;
[0050] FIG3 is a schematic structural diagram of a spectrometer in FIG2 ;
[0051] FIG4 is a schematic diagram of a three-dimensional exploded structure of a main housing provided in an embodiment of the present application;
[0052] FIG5 is a schematic structural diagram of another spectrometer in FIG2 ;
[0053] FIG6 is a schematic structural diagram of another optical splitting system provided in an embodiment of the present application;
[0054] FIG7 is a schematic structural diagram of another optical splitting system provided in an embodiment of the present application;
[0055] FIG8 is a schematic structural diagram of a spectrometer in FIG7 ;
[0056] FIG9 is a schematic structural diagram of another optical splitting system provided in an embodiment of the present application;
[0057] FIG10 is a schematic structural diagram of a spectrometer in FIG9 ;
[0058] FIG11 is a schematic structural diagram of another spectrometer in FIG10 ;
[0059] FIG12 is a schematic structural diagram of another optical splitting system provided in an embodiment of the present application;
[0060] FIG13 is a schematic structural diagram of a spectrometer in FIG12 ;
[0061] FIG14 is a schematic structural diagram of another spectrometer in FIG12 . DETAILED DESCRIPTION
[0062] Figure 1 is a schematic diagram of the structure of an ODN provided by an embodiment of the present application. As shown in Figure 1, the ODN includes an ODF, an SSC, a hub box, an optical splitting system, and an ATB, which are sequentially connected between the OLT and the ONT.
[0063] In an embodiment of the present application, the optical splitting system includes M cascaded optical splitting devices. The input interface of the first optical splitting device in the optical splitting system is connected to the SSC via a multi-core optical cable, and the various optical splitting devices are also connected to each other via multi-core optical cables. Therefore, in an embodiment of the present application, the input interface of each optical splitting device is a multi-core interface.
[0064] The number of cores of the multi-core optical cable can be selected according to actual needs, and the number of terminals in the input interface of the splitter device is the same as the number of cores of the multi-core optical cable. For example, the number of cores of the multi-core optical cable ranges from 2 to 8. Correspondingly, the number of terminals X in the input interface of the splitter device also ranges from 2 to 8. For example, if the number of cores of the multi-core optical cable is 3, X is also 3. Alternatively, if the number of cores of the multi-core optical cable is 4, X is also 4. Alternatively, if the number of cores of the multi-core optical cable is 6, X is also 6. Alternatively, if the number of cores of the multi-core optical cable is 8, X is also 8.
[0065] Among them, the section of optical cable before the splitting system (that is, the input optical cable of the first splitting device of the splitting system, such as the optical cable between the junction box and the first splitting device of the splitting system) and the optical cables between the various splitting devices of the splitting system are usually laid by the operator and can be called distribution segment optical cables. The optical cable between the splitting system and ATB and the optical cable between ATB and ONT are also set up by the operator and are usually called home optical cables.
[0066] In an embodiment of the present application, the input interface of the optical splitter is a multi-core interface, and the multi-core interface is connected to a multi-core optical cable. For scenarios with a high user density, when the number of optical splitters connected to each core of the multi-core optical cable is the same as the number of optical splitters connected to the single-core optical cable in the related art, for a fixed number of users, only a smaller number of distribution segment optical cables is needed to meet the user quantity requirement. For scenarios with multiple operators, different operators can use different optical fibers in the same multi-core optical cable, that is, different operators can share distribution segment optical cables, thereby reducing the number of distribution segment optical cables. It can be seen that in the above two scenarios, the number of distribution segment optical cables is reduced, which is conducive to reducing costs and reducing construction difficulty.
[0067] Optionally, the optical splitting device may be an optical cable splice box, a FAT, or an optical cable fiber splitter box.
[0068] It should be noted that the ODN shown in FIG. 1 may include more or fewer devices, and the number and types of devices may be selected according to actual needs, as long as the optical splitting system is included. This is not limited in the embodiments of the present disclosure.
[0069] The structures of the optical splitting device and the optical splitting system with a multi-core interface are described in detail below.
[0070] FIG2 is a schematic diagram of the structure of a spectrometer system provided in an embodiment of the present application. As shown in FIG2 , the spectrometer system includes M cascaded spectrometers 1. Each of the M spectrometers 1 employs an equally split spectrometer structure. Each spectrometer 1 is used to split the optical signal in one core of a multi-core optical cable (i.e., a distribution segment optical cable) to which the spectrometer system is connected.
[0071] It should be noted that FIG2 takes M equal to 4 as an example. In other embodiments, the number of M can be set according to actual needs as long as it does not exceed the number of cores of the multi-core optical cable connected to the optical splitting device.
[0072] FIG3 is a schematic diagram of the structure of the optical spectrometer shown in FIG2 . As shown in FIG3 , the optical spectrometer 1 includes: a main housing 10, an input interface 20, a first optical splitter 30, and a first output interface group 40. The input interface 20 is connected to the main housing 10. The input interface 20 is a multi-core interface and includes X output terminals, where X is an integer greater than 1. The first output interface group 40 includes multiple first output interfaces (not shown), which are connected to the main housing 10. The first optical splitter 30 is located within the main housing 10. The input terminal of the first optical splitter 30 is connected to the first output terminal of the X output terminals, and the first output terminal of the first optical splitter 30 is connected to the first output interface.
[0073] In the embodiment of the present application, the first optical splitter 30 may be a 1:N optical splitter. The first optical splitter 30 has one input port and N output ports, and may be referred to as a 1:N optical splitter. N is an integer greater than 1. N may be an integer power of 2, such as 4, 8, 16, or 32.
[0074] For example, the input end of the first optical splitter 30 and the input interface 20 may be connected by optical fiber fusion splicing, and the output end of the first optical splitter 30 and the first output interface 40 may be connected by optical fiber fusion splicing.
[0075] In an embodiment of the present application, the input end of the input interface 20 is located outside the main housing 10 and is used to connect to a multi-core optical cable. In some examples, a fiber optic connector is provided at one end of the multi-core optical cable, and the fiber optic connector is inserted into the input interface to connect the input end of the input interface to the multi-core optical cable. This method of plugging the fiber optic connector into the input interface is easy to operate and easy to implement, which is conducive to improving the networking efficiency of the ODN. The present application does not limit the structure of the fiber optic connector, as long as all the cores in the multi-core optical cable can be connected one-to-one with each terminal in the input interface. The output end of the input interface 20 is located inside the main housing 10 and is connected to at least the first optical splitter 30.
[0076] In the embodiment of the present application, the first output interface 40 is used to connect to a drop optical cable and can be referred to as a drop interface. Typically, a drop interface is a single-core interface, and the drop optical cable is a single-core optical cable. Each drop interface is connected to a user terminal device via a single-core optical cable. User terminal devices include the aforementioned ATB and ONT. The number of first output interfaces 40 in the optical splitting device is typically equal to the number of output ports of the first optical splitter 30, that is, equal to N.
[0077] The optical splitter device in Figure 3 is the last optical splitter device among the M optical splitter devices cascaded in Figure 2, that is, the optical splitter device at the end position in an optical fiber link (which can be called the end optical splitter device). Therefore, there is no need to set up a second output interface for connecting to the next optical splitter device.
[0078] In the embodiment of the present application, all interfaces of the optical splitting device are located on the same side wall of the main housing 10 .
[0079] In one possible embodiment, the various interfaces of the optical splitter device are fixedly connected to the side wall of the main housing 10, using connection methods including but not limited to snap-fitting, bonding, and the like. The side wall of the main housing 10 has a light inlet and at least one light outlet, the input interface 20 is connected to the light inlet, and the first output interface is connected to the corresponding light outlet. The light inlet and light outlet are disposed on the same side wall of the main housing 10, that is, the input interface 20 and each first output interface in the first output interface group 40 are located on the same side wall of the main housing 10.
[0080] It should be noted that, for the convenience of drawing, the input interface 20 and the first output interface group 40 in Figure 3 are located on two opposite side walls of the main shell 10, while in actual application, the input interface 20 and each first output interface in the first output interface group 40 are located on the same side wall of the main shell 10, so as to facilitate the connection of each interface (including the input interface and the output interface) with the optical cable.
[0081] Optionally, the input interface 20 also includes a sealing structure, such as a sealing ring, which is located between the input interface 20 and the side wall of the main shell 10 to prevent dust, water stains and other debris from entering the accommodating cavity and causing dust accumulation in the accommodating cavity, damage to components in the accommodating cavity and other problems.
[0082] Figure 4 is a schematic diagram of a three-dimensional disassembly of a main shell provided in an embodiment of the present application. As shown in Figure 4, in another possible embodiment, the input interface 20 and the first output interface are both integrally formed with a side wall of the main shell 10. In this embodiment, the main shell 10 may include a body 111 and an adapter panel 112. The input interface 20 and the first output interface (not shown in the figure) are integrally formed with the adapter panel 112. Here, "integrated molding" means forming an integral structure by injection molding or stamping, and no additional connection method is required to connect two or more components. The body 111 and the adapter panel 112 define a accommodating cavity to accommodate devices such as the first spectrometer 30. The body 111 and the adapter panel 112 can be detachably connected. The present application does not limit the method of detachable connection, including but not limited to snap-on connection, bonding, etc. For example, in Figure 4, the body 111 and the adapter panel 112 are snap-on connected by a first snap-on structure 1111 on the body 111 and a second snap-on structure 1122 on the adapter panel 112.
[0083] Optionally, the main housing 10 further includes a second sealing ring 140 disposed between the main body 111 and the adapter panel 112. For example, as shown in FIG4 , the second sealing ring 140 may be disposed around the outer circumference of the adapter panel 112. When the main body 111 and the adapter panel 112 are connected, the second sealing ring 140 seals the connection between the main body 111 and the adapter panel 112, thereby making the receiving cavity formed by the adapter panel 112 and the main body 111 a sealed cavity, thereby preventing dust, water stains, and other debris from entering the receiving cavity, thereby preventing dust accumulation in the receiving cavity and damage to components in the receiving cavity.
[0084] The embodiment of the present application does not limit the shape of the main shell 10. For example, it can be a rectangular parallelepiped, a cylinder, a frustum, or an irregular shape, etc., which can be selected according to actual needs.
[0085] Figure 5 is a schematic diagram of the structure of another spectrometer device in Figure 2. The spectrometer device in Figure 5 differs from the spectrometer device in Figure 3 in that the spectrometer device in Figure 5 also includes a second output interface 50, which is used to connect to another spectrometer device. The second output interface 50 is a multi-core interface and is connected to the main housing 10. Optionally, the second output interface 50, the input interface 20, and the first output interface are located on the same side wall of the main housing 10.
[0086] Assume that the second output interface 50 includes X input terminals. These X input terminals include X-1 first input terminals and one second input terminal. Of the X output terminals of the input interface 20, all output terminals except the first output terminal are connected to the X-1 first input terminals of the second output interface 50, leaving the second input terminal of the second output interface 50 unused.
[0087] Optionally, all or part of the X input ends of the input interface 20 of the optical splitter device may receive optical signals. When Xi input ends (i is an integer, and i is greater than or equal to 0) of the input interface 20 of the optical splitter device receive optical signals, one optical signal is output to the input end of the first optical splitter 30 through the first output interface 20a of the input interface 20, and the remaining Xi-1 optical signals are output to the Xi-1 first input ends of the second output interface 50 through the second output end of the input interface 20, and are output from the output end of the second output interface 50. In this way, the optical splitter device can provide Xi-1 optical signals to the next optical splitter device.
[0088] When the number of optical splitters in the optical splitting system is equal to the number of cores in the multi-core optical cable, i can indicate the position of the optical splitter among the M optical splitters in the optical splitting system. For the jth optical splitter in the cascade order, i is equal to j-1.
[0089] For example, in Figure 2 , for the first optical splitter device, i equals 0, and the X input ports of the input interface 20 of the first optical splitter device all receive optical signals. One optical signal is output to the input port of the first optical splitter 30 via the first output port 20a of the input interface 20, and the remaining X-1 optical signals are output to the X-1 first input ports of the second output port 50 via the second output port of the input interface 20. In this way, the first optical splitter device can provide X-1 optical signals to the next optical splitter device.
[0090] In this way, each optical splitting device is used to split a received optical signal and transmit the split optical signal to the user terminal device through the first output end of the input interface 20, the first optical splitter 30, the first output interface 40 and the drop optical cable.
[0091] In the optical splitting system shown in FIG2 , the optical signal in each core of the multi-core optical cable is split by only one first optical splitter and then transmitted to the user terminal device. This can reduce loss compared to the method of splitting the optical signal in a single core by cascading an unequal-score optical splitter and an equal-score optical splitter.
[0092] In addition, in the optical splitting system, the first M-1 optical splitting devices also provide optical signals to the next optical splitting device via the second output interface. To ensure that each optical splitting device can transmit one of the at least one received optical signals to the first output interface, it is necessary to connect the output end of the second output interface of the preceding optical splitting device to the input end corresponding to the first output end of the input interface of the succeeding optical splitting device.
[0093] Optionally, the terminal corresponding to the first output end of the input interface 20 is fixed in position within the input interface 20, i.e., for all optical splitting devices, the terminal corresponding to the first output end of the input interface 20 is at the same position within the input interface 20. The terminal corresponding to the second input end of the second output interface 50 is fixed in position within the second output interface 50, i.e., for all optical splitting devices, the terminal corresponding to the second input end of the second output interface 50 is at the same position within the second output interface 50. This facilitates standardization of the optical splitting devices and reduces construction difficulty.
[0094] Figure 6 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. The difference from the optical splitting system shown in Figure 2 is that in Figure 6, all the optical splitting devices are the optical splitting devices in Figure 5, and the optical splitting device in Figure 3 is not included.
[0095] In addition, in FIG6 , the terminals in the input interface 20 and the second output interface 50 are arranged in the same manner. For example, if the X terminals in the output interface 20 are arranged in a straight line along a set direction, then the X terminals in the second output interface 50 are also arranged in a straight line along the set direction (for example, the X terminals in the output interface 20 and the X terminals in the second output interface 50 are both arranged in a vertical or horizontal direction). For another example, if the X terminals in the output interface 20 are arranged in a two-dimensional array, then the X terminals in the second output interface 50 are also arranged in a two-dimensional array (for example, the X terminals in the output interface 20 and the X terminals in the second output interface 50 are both arranged in two rows and two columns).
[0096] In order to facilitate the connection between the output end of the output optical signal of the second output interface 50 of the front spectrometer device and the input end corresponding to the first output end in the input interface 20 of the rear spectrometer device, the position of the terminal corresponding to the first output end of the input interface 20 in the input interface 20 is different from the position of the terminal corresponding to the second input end in the second output interface 50 in the second output interface 50.
[0097] For example, the input interface includes four output terminals arranged in a vertical direction. The second output interface includes four input terminals arranged in a vertical direction. The four output terminals of the input interface and the four input terminals of the second output interface are numbered from top to bottom. The first output terminal can be output terminal 4 in input interface 20, and the second input terminal can be input terminal 1 in second output interface 50.
[0098] The output terminals of the input interface 20 other than the first output terminal can be shifted downward by one position and connected to the first output terminal of the second output interface. For example, input terminal 1 of the input interface 20 is connected to output terminal 2 of the second output interface 50; input terminal 2 of the input interface 20 is connected to output terminal 3 of the second output interface 50; and so on.
[0099] In this way, it can be ensured that the connection mode between the input interface 20 and the second output interface 50 in each optical splitting device is the same, thereby achieving normalization of the optical splitting devices.
[0100] In this embodiment, all the optical splitters in the optical splitting system have the same structure, achieving normalization of the optical splitters. When building an ODN network, there is no need to distinguish between optical splitters with different structures, which reduces construction difficulty and helps improve networking efficiency.
[0101] FIG7 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. As shown in FIG7 , the optical splitting system includes M cascaded optical splitting devices 1. Each optical splitting device 1 is used to split the optical signal in one core of the multi-core optical cable (i.e., the distribution segment optical cable) to which the optical splitting system is connected.
[0102] It should be noted that FIG7 is an example in which M is equal to 4. In other embodiments, the number of M can be set according to actual needs as long as it does not exceed the number of cores of the multi-core optical cable connected to the optical splitting device.
[0103] Fig. 8 is a schematic structural diagram of a spectrometer in Fig. 7. The difference from the spectrometer in Fig. 2 is that the spectrometer 1 in Fig. 8 further includes a second spectrometer 60 and Y first connection interfaces 81, where Y is an integer and greater than 0.
[0104] The input end of the second optical splitter 60 is connected to the first output end of the input interface 20, and the first output end of the second optical splitter 60 is connected to the input end of the first optical splitter 30, so that the input end of the first optical splitter 30 is connected to the first output end of the input interface 20 through the second optical splitter 60, and the Y second output ends of the second optical splitter 60 are connected to the Y first connection interfaces 1. The first connection interface 81 is a single-core interface and is connected to the main housing 10.
[0105] FIG8 illustrates an example in which Y is equal to 1. In other embodiments, Y may also be greater than 1.
[0106] Optionally, the optical splitter device shown in FIG8 may further include an auxiliary housing 10a, a second connection interface 82, an extended optical splitter 90, and a third output interface group 70. The second connection interface 82 and the third output interface in the third output interface group 70 are both connected to the auxiliary housing 10a. The input end of one second connection interface 82 is connected to the output end of one first connection interface 81 via a single-core optical cable. The input end of the extended optical splitter 90 is connected to the output end of the second connection interface 82, and the output end of the extended optical splitter 90 is connected to the third output interface.
[0107] Here, the expansion optical splitter 90 may be an equal-split optical splitter, and the number of output terminals of the expansion optical splitter 90 is the same as the number of output terminals of the first optical splitter 30 .
[0108] The third output interface is used to connect to the drop optical cable and can be referred to as a drop interface. The number of the third output interfaces is the same as the number of output terminals of the expansion optical splitter 90. When the number of output terminals of the expansion optical splitter 90 is the same as the number of output terminals of the first optical splitter 30, the structure of the third output interface can be the same as that of the first output interface.
[0109] In the embodiment of the present application, the main shell 10 and the various interfaces connected thereto, as well as the internal structure of the main shell 10, can be collectively referred to as the main spectrometer unit; the auxiliary shell 10a and the various interfaces connected thereto, as well as the internal structure of the auxiliary shell 10a, can be collectively referred to as the auxiliary spectrometer unit.
[0110] Auxiliary splitter units are optional and can be configured based on actual needs. For example, if user density is high, one or more auxiliary splitter units can be configured to provide connectivity for more users. For another example, if there are multiple operators, auxiliary splitter units can be configured for operators different from the one that the primary splitter unit belongs to. Furthermore, different auxiliary splitter units can be used by different operators. This way, when an end user needs to switch between operators, they only need to connect the drop cable from one splitter unit to another.
[0111] In practical applications, the primary and secondary optical splitting units can be installed close to the user terminals they serve. The distance between the primary and secondary optical splitting units is determined by the distance between the user terminals they serve. The distance between the primary and secondary optical splitting units can be several meters, tens of meters, or even hundreds of meters. Alternatively, the primary and secondary optical splitting units can be deployed on the same pole.
[0112] Optionally, the second optical splitter 60 is an equal-ratio optical splitter of 1:(Y+1).
[0113] In the embodiment shown in Figure 7, the structures of the various optical splitting devices 1 are the same, which is the structure shown in Figure 8. In other embodiments, the last optical splitting device 1 may be based on the structure shown in Figure 8, but with the second output port 50 removed.
[0114] FIG9 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. As shown in FIG9 , the optical splitting system includes M cascaded optical splitting devices 1. These M optical splitting devices 1 all adopt an unequal splitting structure. Each optical splitting device 1 is used to split the optical signals in all cores of the multi-core optical cable (i.e., the distribution segment optical cable) to which the optical splitting system is connected.
[0115] FIG9 illustrates an example in which M is equal to 3. In practical applications, the value of M can be set according to actual needs and has no necessary correlation with the number of cores of the multi-core optical cable connected to the optical splitter. M can be greater than, equal to, or less than the number of cores of the multi-core optical cable.
[0116] Figure 10 is a schematic diagram of the structure of the optical splitter device shown in Figure 9. Unlike the optical splitter device shown in Figure 2, the optical splitter device 1 shown in Figure 10 further includes Y second optical splitters 60 and Y third output interface groups 70. Each third output interface group 70 includes multiple third output interfaces, which are connected to the main housing 10.
[0117] Each of the Y second optical splitters 60 is an equal-splitting optical splitter. The input ends of the Y second optical splitters 60 are each connected to an output end of the input interface 20. That is, the input end of each second optical splitter 60 is connected to an output end of the input interface 20, and the input end of the second optical splitter 60 is connected to a different output end of the output interface 20 than the input end of the first optical splitter 30. The output ends of the Y second optical splitters 60 are each connected to a third output interface group 70, and the third output interfaces connected to the multiple output ends of each second optical splitter 60 belong to the same output interface group 70.
[0118] Where Y is an integer greater than 0 and less than or equal to X-1. When all X output ports of input interface 20 output optical signals, an optical splitter can be provided for each output port. In this case, Y is equal to X-1. When some output ports of input interface 20 output optical signals while other output ports do not output optical signals, an optical splitter can be provided only for the output ports that output optical signals. In this case, Y is less than X-1.
[0119] In this embodiment, the number of output ports of the second optical splitter 60 is the same as the number of output ports of the first optical splitter 30. In other embodiments, the number of output ports of the second optical splitter may be different from the number of output ports of the first optical splitter.
[0120] The third output interface is used to connect to the drop optical cable and can be referred to as a drop interface. The number of the third output interfaces is the same as the number of output terminals of the second optical splitter 60. When the number of output terminals of the second optical splitter 60 is the same as the number of output terminals of the first optical splitter 30, the structure of the third output interface can be the same as that of the first output interface.
[0121] The optical splitting device in FIG10 is the last optical splitting device in the optical splitting system shown in FIG9 , and therefore, there is no need to provide a second output interface for connecting to the next optical splitting device.
[0122] FIG11 is a structural diagram of another optical splitter in FIG9 . The difference from the optical splitter in FIG10 is that the first optical splitter 30 and the second optical splitter 60 in FIG11 are both unequal-splitting optical splitters, and the optical splitter 1 further includes a second output interface 50 .
[0123] In FIG11 , the second optical splitter 60 has one input port and N+1 output ports. The N output ports are first output ports, and the 1 output port is a second output port. N is an integer greater than 1. N can be an integer power of 2, for example, 4, 8, 16, or 32.
[0124] The input ends of the Y second optical splitters 60 are respectively connected to one of the X output ends. The first output end of each second optical splitter 60 is respectively connected to a third output interface. The second output ends of the Y second optical splitters 60 and the second output end of the first optical splitter 30 are both connected to the second output interface 50, and each provides an optical signal to the second output interface 50. The second output interface 50 is connected to the main housing 10.
[0125] The output optical powers of the first output ends of the second optical splitter 60 are equal, and the optical power output by the second output end of the second optical splitter 60 is greater than the sum of the optical powers output by all the first output ends of the second optical splitter 60. For example, the ratio of the optical power output by the second output end of the second optical splitter 60 to the sum of the optical powers output by all the first output ends of the second optical splitter 60 can be set as needed, for example, 90:10, 85:15, 80:20, 75:25, or 70:30.
[0126] The distribution of the output optical power of each output end of the first optical splitter 30 is the same as that of the second optical splitter 60 .
[0127] In some examples, the second optical splitter 60 can be a single optical splitter. In other examples, the second optical splitter 60 includes two cascaded optical splitters, one of which is a 1:2 unequal-ratio optical splitter and the other is a 1:N equal-ratio optical splitter. One output of the 1:2 unequal-ratio optical splitter serves as the second output of the second optical splitter 60, the other output of the 1:2 unequal-ratio optical splitter is connected to the input of the 1:N equal-ratio optical splitter, and the N outputs of the 1:N equal-ratio optical splitter serve as the first output of the second optical splitter 60.
[0128] In the optical splitter device shown in Figures 10 and 11, the optical splitters (first optical splitter 30 and second optical splitter 60) in the main housing 10 can be used by different operators. For example, the first optical splitter 30 can be used by one operator, while the second optical splitter 60 can be used by another operator. When an end user needs to switch between operators, they simply connect the output port of one optical splitter on the drop cable to the output port of the other optical splitter.
[0129] FIG12 is a schematic diagram of the structure of another optical splitting system provided in an embodiment of the present application. As shown in FIG12 , the optical splitting system includes M cascaded optical splitting devices 1. Each of the M optical splitting devices 1 adopts an unequal splitting structure. Each optical splitting device 1 is used to split the optical signals in all cores of the multi-core optical cable (i.e., the distribution segment optical cable) to which the optical splitting system is connected.
[0130] FIG12 illustrates an example in which M is equal to 3. In practical applications, the value of M can be set according to actual needs and has no necessary correlation with the number of cores of the multi-core optical cable connected to the optical splitter. M can be greater than, equal to, or less than the number of cores of the multi-core optical cable.
[0131] Fig. 13 is a schematic structural diagram of a spectrometer in Fig. 12. As shown in Fig. 13, the spectrometer 1 further includes M first connection interfaces 81. Wherein, M is an integer, M is greater than 0 and M is less than or equal to X-1.
[0132] The M first connection interfaces 81 are respectively connected to one output end of the input interface 20 . The first connection interface 81 is a single-core interface and is connected to the main housing 10 .
[0133] FIG14 is a schematic structural diagram of another optical splitter device in FIG12. The optical splitter device in FIG14 differs from the optical splitter device in FIG13 in that the optical splitter device in FIG14 further includes Y second optical splitters 60 and a second output interface 50. Y is an integer greater than 0 and less than or equal to X-1.
[0134] The structure of the first optical splitter 30 refers to the relevant description of the embodiment shown in FIG11 , and will not be repeated here.
[0135] The input ends of the Y second optical splitters 60 are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters 60 are respectively connected to one of the first connection interfaces 81, and the second output ends of the Y second optical splitters 60 and the second output end of the first optical splitter 30 are both connected to the second output interface 50. The second output interface 50 is connected to the main housing 10.
[0136] Exemplarily, the Y second optical splitters 60 are unequal-ratio optical splitters. For example, they can be unequal-ratio optical splitters of 1:2. The second optical splitter 60 has a first output end and a second output end. The ratio of the output optical power of the first output end of the second optical splitter 60 to the output optical power of the second output end of the second optical splitter 60 can be set as needed, for example, it can be 90:10, 85:15, 80:20, 75:25 or 70:30. In implementation, the ratio of the output optical power of the first output end of the second optical splitter 60 to the output optical power of the second output end of the second optical splitter 60 can be equal to the ratio of the optical power output of the second output end of the first optical splitter 30 to the sum of the optical powers output from all first output ends of the first optical splitter 30.
[0137] Optionally, the spectrometer shown in FIG. 13 and FIG. 14 may further include the aforementioned auxiliary spectrometer unit.
[0138] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," "third," and similar terms used in the patent specification and claims of this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one.
[0139] The above description is only one embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the present application shall be included in the scope of protection of the present application.
Claims
1. A spectroscopic device, characterized in that: The optical splitter device comprises: a main housing, an input interface, a first output interface group and a first optical splitter. The input interface is connected to the main housing, the input interface is a multi-core interface and includes X output terminals, where X is an integer and is greater than 1; The first output interface group includes a plurality of first output interfaces, the first output interfaces are connected to the main housing, and are located on the same side wall of the main housing as the input interface; The first optical splitter is located in the main housing, the input end of the first optical splitter is connected to the first output end among the X output ends, and the first output end of the first optical splitter is connected to the first output interface.
2. The spectroscopic device according to claim 1, characterized in that: The optical splitter device further comprises a second output interface for connecting to another optical splitter device, the second output interface is a multi-core interface and is connected to the main housing, and the second output interface and the input interface are located on the same side wall of the main housing; The second output interface is connected to at least part of the output ends of the input interface.
3. The spectroscopic device according to claim 2, characterized in that: The second output interface includes X-1 first input terminals and 1 second input terminal, The other output ends of the X output ends except the first output end are respectively connected to the X-1 first input ends, and the second input end is vacant.
4. The spectroscopic device according to claim 3, characterized in that: The terminals in the input interface and the second output interface are arranged in the same manner, and the position of the first output terminal in the input interface is different from the position of the second input terminal in the second output interface.
5. The spectroscopic device according to claim 3 or 4, characterized in that: The optical splitting device further includes a second optical splitter and Y first connection interfaces, wherein Y is an integer and Y is greater than 0; The input end of the second optical splitter is connected to the first output end of the input interface, and the first output end of the second optical splitter is connected to the input end of the first optical splitter, so that the input end of the first optical splitter is connected to the first output end of the input interface through the second optical splitter, and the Y second output ends of the second optical splitter are connected to the Y first connection interfaces; The first connection interface is a single-core interface and is connected to the main housing.
6. The spectroscopic device according to claim 2, characterized in that: The optical splitting device further includes: Y second optical splitters and Y third output interface groups, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The input ends of the Y second optical splitters are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters are respectively connected to one of the Y third output interface groups, and the second output ends of the Y second optical splitters and the second output end of the first optical splitter are both connected to the second output interface, so that the second output interface is connected to part of the output ends of the input interface through the Y second optical splitters; The third output interface group is connected to the main shell.
7. The spectroscopic device according to claim 2, characterized in that: The optical splitting device further includes Y second optical splitters and Y first connection interfaces, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The input ends of the Y second optical splitters are respectively connected to one of the X output ends, the first output ends of the Y second optical splitters are respectively connected to one of the Y first connection interfaces, and the second output ends of the Y second optical splitters and the second output end of the first optical splitter are both connected to the second output interface, so that the second output interface is connected to the output end of the input interface through the Y second optical splitters; The first connection interface is a single-core interface and is connected to the main housing.
8. The spectroscopic device according to claim 1, characterized in that: The optical splitting device further includes Y first connection interfaces, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The Y first connection interfaces are respectively connected to an output end of the input interface, and the first connection interface is a single-core interface and is connected to the main shell.
9. The spectroscopic device according to claim 1, characterized in that: The optical splitting device further includes a second optical splitter and Y first connection interfaces, wherein Y is an integer and Y is greater than 0; The input end of the second optical splitter is connected to the first output end of the input interface, and the first output end of the second optical splitter is connected to the input end of the first optical splitter, so that the input end of the first optical splitter is connected to the first output end of the input interface through the second optical splitter, and the Y second output ends of the second optical splitter are connected to the Y first connection interfaces; The first connection interface is a single-core interface and is connected to the main housing.
10. The spectroscopic device according to claim 1, characterized in that: The optical splitting device further includes: Y second optical splitters and Y third output interface groups, wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1; The input ends of the Y second optical splitters are respectively connected to one of the X output ends, and the output ends of the Y second optical splitters are respectively connected to one of the Y third output interface groups; The third output interface group is connected to the main shell.
11. The spectroscopic device according to claim 5 and any one of claims 7 to 9, characterized in that: The optical splitter device further comprises: an auxiliary housing, a second connection interface, an extended optical splitter and a third output interface group; The second connection interface is connected to the auxiliary housing, and the second connection interface is connected to the first connection interface via an optical fiber; The input end of the extended optical splitter is connected to the output end of the second connection interface; The third output interface group includes a plurality of third output interfaces, the third output interfaces are connected to the auxiliary housing, and the third output interfaces are connected to the output end of the extended optical splitter.
12. The spectroscopic device according to any one of claims 1 to 5 and claims 8 to 10, characterized in that: The first beam splitter is an equal-ratio beam splitter.
13. The spectroscopic device according to claim 6 or 7, characterized in that: The first beam splitter and the second beam splitter are unequal-ratio beam splitters.
14. The spectroscopic device according to claim 9 or 10, characterized in that: The second beam splitter is an equal-score beam splitter.
15. The spectroscopic device according to any one of claims 1 to 12, characterized in that: The value range of X is 2 to 8.
16. A spectroscopic system, characterized in that: The optical splitting system comprises M cascaded optical splitting devices; two adjacent optical splitting devices are connected via a multi-core optical cable; The M optical splitting devices include M-1 first optical splitting devices and 1 second optical splitting device. The first spectroscopic device is the spectroscopic device according to any one of claims 3 to 5, and the second spectroscopic device is the spectroscopic device according to claim 1 and any one of claims 3 to 5; wherein M is an integer, M is greater than 2 and M is less than or equal to X, and the first spectrometer is an equal-splitting spectrometer.
17. A spectroscopic system, characterized in that: The optical splitting system comprises M cascaded optical splitting devices; two adjacent optical splitting devices are connected via a multi-core optical cable; The M optical splitting devices include M-1 first optical splitting devices and 1 second optical splitting device, wherein M is an integer and M is greater than 2; The first spectroscopic device is the spectroscopic device according to claim 7, and the second spectroscopic device is the spectroscopic device according to claim 8 Set.
18. A spectroscopic system, characterized in that: The optical splitting system comprises M cascaded optical splitting devices; two adjacent optical splitting devices are connected by a multi-core optical cable, wherein M is an integer and M is greater than 2; The M optical splitting devices include M-1 first optical splitting devices and 1 second optical splitting device. The first spectroscopic device is the spectroscopic device according to claim 6, and the second spectroscopic device is the spectroscopic device according to claim 10.