CN220419623U - Spectroscopic device and spectroscopic system - Google Patents

Abstract

The application discloses a light splitting device and a light splitting system, and belongs to the technical field of optical communication. The light splitting device comprises a main shell, an input interface, a first output interface and a first light splitter, wherein the input interface is connected with the main shell, the input interface is a multi-core interface and comprises X output ends, and X is an integer and is larger than 1; the first output interface group comprises a plurality of first output interfaces, and the first output interfaces are connected with the main shell and are positioned on the same side wall of the main shell with the input interfaces; the first optical splitter is located in the main shell, the input end of the first optical splitter is connected with a first output end of the X output ends, and the first output end of the first optical splitter is connected with the first output interface. The light splitting device can multiplex the distribution section optical cable with other light splitting devices, and is beneficial to reducing cost and construction difficulty.

Description

Spectroscopic device and spectroscopic system

Technical Field

The present disclosure relates to the field of optical communications technologies, and in particular, to a light splitting device and a light splitting system.

Background

An optical distribution network (Optical distribution network, ODN) provides an optical transport physical path between an optical line terminal (Optical line terminal, OLT) and an optical network terminal (Optical network terminal, ONT). In ODNs, it is often necessary to split the optical fibers in the cable to cover more subscribers.

In the related art, an optical signal sent by the OLT sequentially passes through an optical distribution frame (Optical Distribution Frame, ODF), an optical cable splice closure (splitting and splicing closure, SSC), a spectroscopic system, and an optical fiber termination closure (access terminal box, ATB) to reach the ONT. The optical splitting system is connected with the SSC through a single-core optical cable and comprises at least two optical splitting devices cascaded through the single-core optical cable.

The number of optical splitters that can be connected to one single-core optical cable is limited, and the number of ONTs that can be connected to each optical splitter is limited, so that in a scenario where the user density is high, the number of distribution segment optical cables (i.e., single-core optical cables between the optical splitter system and the SSC) and the number of optical splitters need to be increased to meet the requirement of the number of users. In the case of multiple operators, the number of patch cables is large because different operators need to use different patch cables. The number of the optical cables at the distribution section is large, so that the cost is increased, and the construction difficulty is increased.

Disclosure of Invention

The utility model provides a beam splitting device and beam splitting system can reduce the quantity of distribution section optical cable to reduce cost and reduce the construction degree of difficulty.

In a first aspect, the present application provides a spectroscopic apparatus. The optical splitting device may be an optical cable splice closure, an optical fiber splitting box (fiber access terminal, FAT), an optical cable splitting box, or the like. The spectroscopic device includes: the optical splitter comprises a main shell, an input interface, a first output interface group and a first optical splitter. The input interface is connected with the main shell, the input interface is a multi-core interface and comprises X output ends, and X is an integer and is more than 1. The input end of the input interface is used for being connected with the multi-core optical cable. For example, the input end of the input interface is connected with the multi-core optical cable through an optical fiber connector. The first output interface group comprises a plurality of first output interfaces, and the first output interfaces are connected with the main shell. The first output interface is used for being connected with the home optical cable. The first optical splitter is located in the main shell, the input end of the first optical splitter is connected with a first output end of the X output ends, and the first output end of the first optical splitter is connected with the first output interface.

In this application, the interface may also be referred to as a fiber optic adapter or fiber optic connector, etc.

In this application, the input interface of the optical splitting device is a multi-core interface, and the multi-core interface may be connected with a multi-core optical cable. For the scene of higher user density, under the condition that the number of the light splitting devices connected by each core of the multi-core optical cable is the same as that of the light splitting devices connected by the single-core optical cable in the related technology, for the fixed user number, the requirement of the user number can be met by only needing fewer distribution section optical cables. For multiple operator scenarios, different operators may use different fibers in the same multi-core cable, i.e., different operators may share the patch cable, thereby reducing the number of patch cables.

Therefore, the number of the optical cables at the distribution section is reduced in the two scenes, which is beneficial to reducing the cost and the construction difficulty.

In one possible embodiment, the optical splitting device may only comprise an output interface (first output interface) for connection to a fiber optic cable for home entry, and not comprise an output interface (second output interface) for connection to other optical splitting devices. In this case, the optical splitting device is an optical splitting device at an end position in an optical fiber link. May be referred to as an end-point spectroscopic device.

In the present application, the end spectroscopic device may employ any one of the following five structures:

the first type of optical splitter device only comprises the first optical splitter, but does not comprise other optical splitters, and the first optical splitter is an equal-ratio optical splitter.

Optionally, the first beam splitter is a 1:n beam splitter, where N is an integer and greater than 1.N may be equal to an integer power of 2, for example, may be equal to 8, 16, 32, or the like.

The second and light splitting device comprises Y second light splitters in addition to the first light splitters. The first beam splitter and the second beam splitter are both equal ratio beam splitters. The second beam splitter is positioned in the main housing.

Optionally, the first beam splitter and the second beam splitter are each a 1:n beam splitter.

In the second structure, the optical splitting device further comprises Y third output interface groups for connecting with the home optical cable. Each third output interface group comprises a plurality of third output interfaces, and the third output interfaces are connected with the main shell. The input ends of the Y second optical splitters are respectively connected with one output end of the input interface, and the output ends of the Y second optical splitters are respectively connected with a third output interface.

The second optical splitter is added to split more optical signals and the optical signals are provided for the user terminal equipment through a third output interface connected with the second optical splitter, so that the optical splitter can serve more users. In addition, each optical splitter (including the first optical splitter and the second optical splitter) can be used by different operators, and when a user needs to switch operators, the user only needs to switch the output interface connected with the home optical cable, so that the implementation is convenient.

The third and light splitting device comprises Y first connection interfaces besides the first light splitter. The Y first connection interfaces are respectively connected with one output end of the input interface. The first connection interface is a single-core interface and is connected with the main shell and used for being connected with the auxiliary light splitting unit.

The fourth and light splitting device comprises the first light splitter, a second light splitter and Y first connection interfaces, wherein Y is an integer and is larger than 0. The input end of the second optical splitter is connected with the first output end of the input interface, the first output end of the second optical splitter is connected with the input end of the first optical splitter, so that the input end of the first optical splitter is connected with the first output end of the input interface through the second optical splitter, and Y second output ends of the second optical splitter are connected with Y first connection interfaces. The first connection interface is a single-core interface and is connected with the main shell and used for being connected with the auxiliary light splitting unit.

The fifth and light-splitting device includes at least one auxiliary light-splitting unit in addition to the components corresponding to the third or fourth configuration.

In the third, fourth and fifth configurations, the auxiliary light splitting unit includes an auxiliary housing, a second connection interface, an expansion beam splitter and a third output interface group. The third output interface group includes a plurality of third output interfaces. The second connecting interface and the third output interface are connected with the auxiliary shell. The second connection interface is connected with the first connection interface through an optical fiber. The input end of the expansion beam splitter is connected with the output end of the second connection interface, and the third output interface is connected with the output end of the expansion beam splitter.

The first connecting interface is configured for the light splitting device to be connected with the auxiliary light splitting unit, so that whether the auxiliary light splitting unit is arranged or not and the arrangement position of the auxiliary light splitting unit are selected according to the needs, and the construction difficulty is further reduced. After the connection of the auxiliary splitter unit, the extension splitter and the third output interface may serve more subscribers. In addition, each optical splitter (including the first optical splitter and the extension optical splitter) can be used by different operators, and when a user needs to switch operators, the user only needs to switch the output interface connected with the home optical cable, so that the implementation is convenient.

In another possible embodiment, the optical splitting device comprises, in addition to a first output interface for connection to a fiber-in-home cable, a second output interface for connection to other optical splitting devices. The second output interface is a multi-core interface and is connected with the main shell. The second output interface is connected with at least part of the output ends of the input interface.

In one optical fiber link, the optical splitter may be a splitter other than the splitter closest to the user side, or may be a splitter closest to the user side, among a plurality of cascaded splitters.

Alternatively, the spectroscopic apparatus including both the first output interface and the second output interface may adopt any one of the following five structures:

the first output interface and the second output interface comprise X-1 first input ends and 1 second input end, wherein other output ends except the first output ends in the X output ends are respectively connected with the X-1 first input ends, and the second input ends are empty.

Optionally, the arrangement manner of the terminals in the input interface and the second output interface is the same, and the position of the first output end in the input interface is different from the position of the second input end in the second output interface. Therefore, the plurality of light splitting devices in the light splitting system can adopt the same structure, normalization of the light splitting devices is facilitated, and construction difficulty is reduced.

The 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, wherein Y is an integer, Y is more than 0 and Y is less than or equal to X-1. The third output interface group comprises a plurality of third output interfaces, and the third output interfaces are connected with the main shell. The input ends of the Y second optical splitters are respectively connected with one output end of the X output ends, the first output ends of the Y second optical splitters are respectively connected with the Y third output interface groups, and the second output ends of the Y second optical splitters and the second output ends of the first optical splitters are connected with the second output interfaces.

Here, the first beam splitter and the Y second beam splitters are unequal ratio beam splitters. The number of outputs of the first beam splitter and the number of outputs of the second beam splitter may be the same or different. When the number of output ends of the first beam splitter and the number of output ends of the second beam splitter are the same, the beam splitting ratio of the first beam splitter and the beam splitting ratio of the second beam splitter may be the same.

Third, the optical splitting device further includes Y second optical splitters and Y first connection interfaces in addition to the main housing, the input interface, the first optical splitters and the first output interface group. Wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1. The first beam splitter and the Y second beam splitters are unequal ratio beam splitters. The input ends of the Y second optical splitters are respectively connected with one output end of the X output ends, the first output ends of the Y second optical splitters are respectively connected with one first connection interface 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 splitters are connected with the second output interface. The first connection interface is a single-core interface and is connected with the main shell and used for being connected with the auxiliary light splitting unit.

Here, the first beam splitter and the Y second beam splitters are unequal ratio beam splitters. The number of outputs of the first beam splitter and the number of outputs of the second beam splitter may be different.

Fourth, in addition to the main housing, the input interface, the first optical splitter, and the first output interface group, the optical splitting 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 with the first output end of the input interface, the first output end of the second optical splitter is connected with the input end of the first optical splitter, so that the input end of the first optical splitter is connected with the first output end of the input interface through the second optical splitter, and Y second output ends of the second optical splitter are connected with Y first connection interfaces. The first connection interface is a single-core interface and is connected with the main shell and used for being connected with the auxiliary light splitting unit.

Illustratively, the first optical splitter and the expansion optical splitter are both equal-ratio optical splitters and the number of output ends of the first optical splitter is equal to the number of output ends of the expansion optical splitter. In this case, the second beam splitter is 1: an isocratic beam splitter of (Y+1).

The fifth and spectroscopic apparatus includes at least one auxiliary spectroscopic unit in addition to the components in the third or fourth configuration. The structure and function of the auxiliary light-splitting unit are the same as those of the auxiliary light-splitting unit, and are not described here again.

In one possible embodiment, all of the interfaces with the main housing are located on the same side wall of the main housing.

In another possible embodiment, all the interfaces connected to the main housing are located on different side walls of the main housing, for example on opposite side walls of the main housing where the input and output interfaces are located.

In a second aspect, the present application provides a spectroscopic system. The light splitting system comprises M cascaded light splitting devices; two adjacent light splitting devices are connected through a multi-core optical cable.

In a first possible embodiment, the M light splitting devices include M-1 first light splitting devices and 1 second light splitting device. The first light splitting device is a light splitting device with the first structure and the first and second output interfaces, and the second light splitting device is a tail end light splitting device with the first structure.

In this embodiment, different cores of the multi-core optical cable correspond to different optical splitters, and one optical splitter in each optical splitter is an equal-ratio optical splitter.

In a second possible embodiment, the M optical splitting devices are all optical splitting devices having the first structure and having the first and second output interfaces.

In the first and second possible embodiments, M is an integer, M is greater than 2 and M is less than or equal to X.

In the first and second possible embodiments, for the optical signal in each core of the multi-core optical cable, only one first optical splitter is used for splitting and then transmitting the optical signal to the user terminal device, and compared with a mode of adopting an unequal ratio optical splitter and an equal ratio optical splitter to perform cascade light splitting on the optical signal in a single core, the loss can be reduced.

In a third possible embodiment, the M light splitting devices include M-1 first light splitting devices and 1 second light splitting device. The first spectroscopic device is a spectroscopic device having the aforementioned second configuration and having both the first and second output interfaces. The second spectroscopic device is the aforementioned end spectroscopic device having the second structure.

In a fourth possible embodiment, the M light splitting devices include M-1 first light splitting devices and 1 second light splitting device. The first spectroscopic device is a spectroscopic device having the aforementioned third or fourth configuration and having both the first and second output interfaces. The second spectroscopic device is the aforementioned end spectroscopic device having the third or fourth configuration.

In a third and fourth possible embodiment, M is an integer and M 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, irrespective of the number of cores of the multi-core optical cable, and thus, M may be greater than or equal to or less than X.

Drawings

Fig. 1 is a schematic structural diagram of an ODN according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a spectroscopic system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a spectroscopic apparatus of FIG. 2;

FIG. 4 is a schematic perspective exploded view of a main housing according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another spectroscopic apparatus;

fig. 6 is a schematic structural diagram of another optical splitting system according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another optical splitting system according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a spectroscopic assembly of FIG. 7;

fig. 9 is a schematic structural diagram of another optical splitting system according to an embodiment of the present application;

FIG. 10 is a schematic view of a light splitting device of FIG. 9;

FIG. 11 is a schematic view of another spectroscopic apparatus of FIG. 10;

FIG. 12 is a schematic structural diagram of another spectroscopic system according to an embodiment of the present application;

FIG. 13 is a schematic view of a light splitting device of FIG. 12;

fig. 14 is a schematic structural view of another spectroscopic apparatus in fig. 12.

Detailed Description

Fig. 1 is a schematic structural diagram of an ODN according to an embodiment of the present application. As shown in fig. 1, the ODN includes an ODF, an SSC, a Hub Box (Hub Box), a spectroscopic system, and an ATB, which are sequentially connected between the OLT and the ONTs.

In the embodiment of the application, the optical splitting system includes M cascaded optical splitting devices. The input interface of the first light splitting device in the light splitting system is connected with the SSC through the multi-core optical cable, and the light splitting devices are also connected through the multi-core optical cable, so in the embodiment of the application, the input interface of each light splitting device is a multi-core interface.

The number of cores of the multi-core optical cable can be selected according to actual needs, and the number of terminals in an input interface of the light splitting device is the same as the number of cores of the multi-core optical cable. Illustratively, the number of cores of the multi-core cable ranges from 2 to 8. Correspondingly, the value range of the number X of the terminals in the input interface of the light splitting device is 2-8. For example, the core number of the multi-core optical cable is 3, and x is also 3. Alternatively, the multicore cable has a core count of 4, and x is also 4. Alternatively, the core number of the multi-core optical cable is 6, and x is also 6. Alternatively, the core number of the multi-core optical cable is 8, and x is also 8.

Wherein a length of optical cable before the optical splitting system (i.e. the input optical cable of the first optical splitting device of the optical splitting system, such as the optical cable between the junction box and the first optical splitting device of the optical splitting system) and the optical cable between the optical splitting devices of the optical splitting system are typically laid by an operator, and may be referred to as a distribution section optical cable, and the optical cable between the optical splitting system and the ATB and the optical cable between the ATB and the ONT are also set by the operator, and are typically referred to as a service-in optical cable.

In this embodiment of the present application, the input interface of the optical splitting device is a multicore interface, and the multicore interface is connected with a multicore optical cable. For the scene of higher user density, under the condition that the number of the light splitting devices connected by each core of the multi-core optical cable is the same as that of the light splitting devices connected by the single-core optical cable in the related technology, for the fixed user number, the requirement of the user number can be met by only needing fewer distribution section optical cables. For multiple operator scenarios, different operators may use different fibers in the same multi-core cable, i.e., different operators may share the patch cable, thereby reducing the number of patch cables. Therefore, the number of the optical cables at the distribution section is reduced in the two scenes, which is beneficial to reducing the cost and the construction difficulty.

Alternatively, the optical splitting device may be a cable splice box, FAT, or cable box, etc.

It should be noted that the ODN shown in fig. 1 may further include more or fewer devices, and the number and types of the devices may be selected according to actual needs, so long as a light splitting system is included therein, which is not limited in the embodiments of the present disclosure.

The configuration of the spectroscopic apparatus having the multi-core interface and the spectroscopic system will be described in detail below.

Fig. 2 is a schematic structural diagram of a spectroscopic system according to an embodiment of the present application. As shown in fig. 2, the spectroscopic system includes M spectroscopic devices 1 in cascade. The M spectroscopic devices 1 each adopt an equal-ratio spectroscopic structure. Each of the optical branching devices 1 is for branching an optical signal in one core of a multi-core optical cable (i.e., a distribution segment optical cable) to which the optical branching system is connected.

In fig. 2, M is equal to 4 as an example, and in other embodiments, the number of M may be set according to actual needs, so long as the number of cores of the multi-core optical cable connected to the optical splitting device is not exceeded.

Fig. 3 is a schematic structural diagram of a spectroscopic apparatus in fig. 2. As shown in fig. 3, the spectroscopic apparatus 1 includes: the optical splitter comprises a main housing 10, an input interface 20, a first splitter 30 and a first output interface set 40. The input interface 20 is connected with the main housing 10, and the input interface 20 is a multi-core interface and includes X output ends, where X is an integer and greater than 1. The first output interface group 40 includes a plurality of first output interfaces (not shown) connected with the main casing 10. The first optical splitter 30 is located in the main housing 10, and an input end of the first optical splitter 30 is connected to a first output end of the X output ends, and a first output end of the first optical splitter 30 is connected to a first output interface.

In the embodiment of the present application, the first beam splitter 30 may be an equal ratio beam splitter. The first optical splitter 30 has one input and N outputs, which may be referred to as 1: an N-beam splitter. Wherein N is an integer greater than 1.N may be equal to an integer power of 2, for example, may be equal to 4, 8, 16, or 32, etc.

Illustratively, the input end of the first optical splitter 30 and the input interface 20 may be connected by optical fiber fusion, and the output end of the first optical splitter 30 and the first output interface 40 may be connected by optical fiber fusion.

In the present embodiment, the input end of the input interface 20 is located outside the main housing 10 for connection with a multi-core optical cable. In some examples, an optical fiber connector is disposed at one end of the multi-core optical cable, and the input end of the input interface is connected to the multi-core optical cable by inserting the optical fiber connector into the input interface. The mode of splicing the optical fiber connector and the input interface is convenient to operate and easy to realize, and is beneficial to improving the networking efficiency of the ODN. The structure of the optical fiber connector is not limited, and all cores in the multi-core optical cable can be connected with all terminals in the input interface in a one-to-one correspondence mode. 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.

In the embodiment of the present application, the first output interface 40 is used for connecting with a fiber-to-the-home cable, and may be referred to as a fiber-to-the-home interface. Typically, the home interfaces are single-core interfaces, the home optical cables are single-core optical cables, and each home interface is connected with the user terminal equipment through one single-core optical cable. User terminal equipment such as ATB and ONT and the like. The number of first output interfaces 40 in the optical splitting device is typically equal to the number of outputs of the first optical splitter 30, i.e. N.

The optical splitting device in fig. 3 is the last optical splitting device in the M optical splitting devices cascaded in fig. 2, i.e. the optical splitting device in the end position in one optical fiber link (may be referred to as the end optical splitting device), so that there is no need to provide a second output interface for connecting with the next optical splitting device.

In the present embodiment, all interfaces of the spectroscopic device are located on the same side wall of the main housing 10.

In one possible embodiment, each interface of the spectroscopic assembly is fixedly connected to the side wall of the main housing 10 by means including, but not limited to, clamping, bonding, and the like. The side wall of the main housing 10 has an optical inlet and at least one optical outlet, the input interface 20 being connected to the optical inlet, and the first output interface being connected to the corresponding optical outlet. The light inlet and the light outlet are arranged on the same side wall of the main housing 10, i.e. the input interface 20 and each first output interface of the first output interface group 40 are located on the same side wall of the main housing 10.

It should be noted that, for convenience of drawing, the input interface 20 and the first output interface group 40 in fig. 3 are located on two opposite sidewalls of the main housing 10, and in practical application, each of the input interface 20 and the first output interface group 40 is located on the same sidewall of the main housing 10, so as to connect each interface (including the input interface and the output interface) with an optical cable.

Optionally, the input interface 20 further includes a sealing structure, such as a sealing ring, between the input interface 20 and the side wall of the main housing 10, so as to prevent dust accumulation in the accommodating cavity and damage to components in the accommodating cavity caused by entry of impurities such as dust, water stains, etc.

Fig. 4 is a schematic perspective view of a main housing according to an embodiment of the present disclosure. In another possible embodiment, as shown in fig. 4, the input interface 20 and the first output interface are both integrally formed with a side wall of the main housing 10. In this embodiment, the main housing 10 may include a body 111 and a transition panel 112. The input interface 20 and the first output interface (not shown) are integrally formed with the adapter panel 112. Here, "integrally formed" means that two or more parts are connected by injection molding or stamping to form a unitary structure without requiring additional connection means. The body 111 and the transition panel 112 define a receiving cavity to receive the first beam splitter 30 and the like. The body 111 and the adapter panel 112 may be detachably connected. The application does not limit the detachable connection mode, including but not limited to clamping, bonding, etc. For example, in fig. 4, the body 111 and the adapter panel 112 are engaged with each other by a first engaging structure 1111 on the body 111 and a second engaging structure 1122 on the adapter panel 112.

Optionally, the main housing 10 further comprises a second sealing ring 140 disposed between the body 111 and the adaptor panel 112. As shown in fig. 4, a second sealing ring 140 may be disposed on a periphery of the outer ring of the adapting panel 112, and when the body 111 is connected with the adapting panel 112, the second sealing ring 140 seals at a connection portion between the body 111 and the adapting panel 112, so that a containing cavity formed by the adapting panel 112 and the body 111 becomes a closed cavity, and problems of dust accumulation in the containing cavity, damage to components in the containing cavity and the like caused by entry of impurities such as dust, water stains and the like into the containing cavity are prevented.

The shape of the main casing 10 is not limited in this embodiment, and may be, for example, a cuboid, a cylinder, a truncated cone, or an irregular shape, etc., and may be selected according to actual needs.

Fig. 5 is a schematic structural diagram of another spectroscopic apparatus in fig. 2. The spectroscopic assembly of fig. 5 differs from the spectroscopic assembly of fig. 3 in that the spectroscopic assembly of fig. 5 further comprises a second output interface 50, the second output interface 50 being adapted to be connected to a further spectroscopic assembly. 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.

Assume that the second output interface 50 includes X inputs. Wherein the X inputs comprise X-1 first inputs and 1 second input. Of the X output terminals of the input interface 20, the other output terminals except the first output terminal are respectively connected to X-1 first input terminals of the second output interface 50, and the second input terminal of the second output interface 50 is left empty.

Alternatively, the X inputs of the input interface 20 of the optical splitting device may receive all or part of the optical signals. When X-i input ends (i is an integer and i is greater than or equal to 0) exist in the input interface 20 of the optical splitting device, 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 X-i-1 optical signals are output to the X-i-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. Thus, the optical splitter can provide the X-i-1 optical signal to the next optical splitter.

When the number of spectroscopic devices included in the spectroscopic system is equal to the number of cores of the multi-core optical cable, i may indicate the positions of the spectroscopic devices among the M spectroscopic devices included in the spectroscopic system. For the j-th spectroscopic device in cascade order, i is equal to j-1.

For example, in fig. 2, for the 1 st spectroscopic device, i is equal to 0, and the X input terminals of the input interface 20 of the 1 st spectroscopic device all receive the 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 X-1 optical signals are output to the X-1 first input ends of the second output interface 50 through the second output end of the input interface 20. Thus, the 1 st optical splitter can supply the X-1 optical signal to the next optical splitter.

In this way, each light splitting device is configured 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 light splitter 30, the first output interface 40, and the home optical cable.

In the optical splitting system shown in fig. 2, the optical signal in each core of the multi-core optical cable is split by only one first splitter and then transmitted to the user terminal device, so that the loss can be reduced compared with a mode of splitting the optical signal in a single core by using an unequal ratio splitter and an equal ratio splitter in cascade.

In addition, in the optical splitting system, the first M-1 optical splitting devices also provide optical signals to the next optical splitting device through the second output interface. In order to ensure that each optical splitting device can transmit one optical signal of the received at least one optical signal to the first output interface, an output end of an output optical signal of the second output interface of the previous optical splitting device needs to be connected with an input end corresponding to the first output end in the input interfaces of the subsequent optical splitting devices.

Optionally, the position of the terminal corresponding to the first output end of the input interface 20 in the input interface 20 is fixed, i.e. the position of the terminal corresponding to the first output end of the input interface 20 in the input interface 20 is the same for all spectroscopic devices. The position of the terminal corresponding to the second input end of the second output interface 50 in the second output interface 50 is fixed, i.e. the position of the terminal corresponding to the second input end of the second output interface 50 in the second output interface 50 is the same for all spectroscopic devices. Thus, normalization of the light splitting device is facilitated, and construction difficulty is reduced.

Fig. 6 is a schematic structural diagram of another optical splitting system according to an embodiment of the present application. The difference from the spectroscopic system shown in fig. 2 is that in fig. 6, all spectroscopic devices are spectroscopic devices in fig. 5, and not including spectroscopic devices in fig. 3.

In fig. 6, the terminals in the input interface 20 and the second output interface 50 are arranged in the same manner. For example, the X terminals in the output interface 20 are aligned in a set direction, and accordingly, the X terminals in the second output interface 50 are also aligned in the set direction (e.g., the X terminals in the output interface 20 and the X terminals in the second output interface 50 are each aligned in a vertical direction or a horizontal direction). For another example, the X terminals in the output interface 20 are arranged in a two-dimensional array, and accordingly, the X terminals in the second output interface 50 are also arranged in a two-dimensional array (e.g., the X terminals in the output interface 20 and the X terminals in the second output interface 50 are each arranged in 2 rows and 2 columns).

In order to facilitate the connection of the output end of the output optical signal of the second output interface 50 of the preceding optical splitter with the input end corresponding to the first output end of the input interface 20 of the following optical splitter, 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 of the second output interface 50 in the second output interface 50.

For example, the input interface includes 4 output terminals arranged in the vertical direction. The second output interface comprises 4 input ends which are arranged along the vertical direction. The 4 outputs of the input interface and the 4 inputs of the second output interface are numbered in a top-to-bottom direction. The first output may be output 4 in input interface 20 and the second input may be input 1 in second output interface 50.

The other output terminals of the input interface 20 than the first output terminal may be shifted down by one bit and connected to the first output terminal of the second output interface. For example, input 1 in input interface 20 is connected to output 2 in second output interface 50; an input terminal 2 in the input interface 20 is connected to an output terminal 3 in the second output interface 50; and so on.

In this way, the connection mode between the input interface 20 and the second output interface 50 is the same inside each spectroscopic device, so that normalization of the spectroscopic device is realized.

In this embodiment, all the spectroscopic devices in the spectroscopic system have the same structure, and normalization of the spectroscopic devices is achieved. When the ODN is networked, the light splitting devices with different structures do not need to be distinguished, so that the construction difficulty is reduced, and the networking efficiency is improved.

Fig. 7 is a schematic structural diagram of another optical splitting system according to an embodiment of the present application. As shown in fig. 7, the spectroscopic system includes M spectroscopic devices 1 in cascade. Each of the optical branching devices 1 is for branching an optical signal in one core of a multi-core optical cable (i.e., a distribution segment optical cable) to which the optical branching system is connected.

In fig. 7, M is equal to 4 as an example, and in other embodiments, the number of M may be set according to actual needs, so long as the number of cores of the multi-core optical cable connected to the optical splitting device is not exceeded.

Fig. 8 is a schematic structural diagram of a spectroscopic apparatus in fig. 7. The difference from the spectroscopic apparatus shown in fig. 2 is that the spectroscopic apparatus 1 shown in fig. 8 further comprises a second spectroscope 60 and Y first connection interfaces 81, wherein Y is an integer and Y is larger than 0.

The input end of the second optical splitter 60 is connected with the first output end of the input interface 20, the first output end of the second optical splitter 60 is connected with the input end of the first optical splitter 30, so that the input end of the first optical splitter 30 is connected with 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 with the Y first connection interfaces 1. The first connection interface 81 is a single-core interface and is connected to the main housing 10.

In fig. 8, which is illustrated with Y equal to 1, Y may be greater than 1 in other embodiments.

Optionally, the optical splitting device shown in fig. 8 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 of the third output interface group 70 are both connected to the auxiliary housing 10 a. The input end of a second connection interface 82 is connected to the output end of a first connection interface 81 via a single-core optical cable. An input terminal of the expansion beam splitter 90 is connected to an output terminal of the second connection interface 82, and an output terminal of the expansion beam splitter 90 is connected to a third output interface.

Here, the spread beam splitter 90 may be an equal-ratio beam splitter, and the number of output ends of the spread beam splitter 90 is the same as the number of output ends of the first beam splitter 30.

The third output interface is used for connecting with the home optical cable and can be called a home interface. The number of third output interfaces is the same as the number of output terminals of the spread spectrum splitter 90. When the number of output terminals of the expansion beam splitter 90 is the same as the number of output terminals of the first beam splitter 30, the third output interface and the first output interface may have the same structure.

In the embodiment of the present application, the main housing 10 and the respective interfaces to which it is connected, together with the internal structure of the main housing 10, may be referred to as a main spectroscopic unit; the sub-housing 10a and its connected interfaces, together with the internal structure of the sub-housing 10a, may be referred to as a sub-spectroscopic unit.

The auxiliary light splitting unit is of an optional structure and can be selected and arranged according to actual needs. For example, if the user density is greater, one or more secondary light splitting units may be provided to provide connectivity for more users. For another example, if there are multiple operators, the secondary spectroscopic unit may be provided for use by a different operator than the operator to which the primary spectroscopic unit belongs, and the different secondary spectroscopic unit may be used by a different operator. Thus, when an end user needs to switch between different operators, only the drop cable needs to be accessed from one drop unit to another.

In practical applications, the main beam splitting unit and the auxiliary beam splitting unit may be disposed close to the served user terminal device. The distance between the main light splitting unit and the auxiliary light splitting unit is determined by the distance between the user terminal equipment served by the main light splitting unit and the auxiliary light splitting unit, and the distance between the main light splitting unit and the auxiliary light splitting unit can be several meters, tens of meters or even hundreds of meters. Alternatively, the main beam splitting unit and the auxiliary beam splitting unit may be disposed on the same pole.

Optionally, the second beam splitter 60 is 1: an isocratic beam splitter of (Y+1).

In the embodiment shown in fig. 7, the respective spectroscopic devices 1 have the same configuration as shown in fig. 8. In other embodiments, the last spectroscopic assembly 1 may be configured as shown in fig. 8, with the second output port 50 removed.

Fig. 9 is a schematic structural diagram of another optical splitting system according to an embodiment of the present application. As shown in fig. 9, the spectroscopic system includes M spectroscopic devices 1 in cascade. The M spectroscopic devices 1 each adopt a structure for unequal ratio spectroscopic. Each of the optical branching devices 1 is for branching optical signals in all cores of a multi-core optical cable (i.e., a distribution segment optical cable) to which the optical branching system is connected.

In fig. 9, M is equal to 3, and in practical application, the value of M may be set according to practical needs, and there is no necessary association with the number of cores of the multi-core optical cable connected to the optical splitting device, and M may be greater than or equal to or less than the number of cores of the multi-core optical cable.

Fig. 10 is a schematic structural view of a spectroscopic apparatus in fig. 9. The spectroscopic apparatus 1 shown in fig. 10 is different from the spectroscopic apparatus shown in fig. 2 in that the spectroscopic apparatus 1 further includes Y second splitters 60 and Y third output interface groups 70. Each third output interface group 70 includes a plurality of third output interfaces, which are connected with the main casing 10.

The Y second splitters 60 are all equal-ratio splitters. The input ends of the Y second optical splitters 60 are respectively connected to one output end of the input interface 20, that is, the input end of each second optical splitter 60 is connected to one output end of the input interface 20, and the input end of the second optical splitter 60 is different from the output end of the output interface 20 to which the input end of the first optical splitter 30 is connected. The output ends of the Y second optical splitters 60 are respectively 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.

Wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1. When the X output terminals of the input interface 20 each output an optical signal, a beam splitter may be provided for each output terminal, where Y is equal to X-1. When a part of the output terminals of the input interface 20 outputs an optical signal and another part of the output terminals of the input interface 20 does not output an optical signal, an optical splitter may be provided only for the output terminals outputting the optical signal, and Y is smaller than X-1.

In this embodiment, the number of output ends of the second beam splitter 60 is the same as the number of output ends of the first beam splitter 30. In other embodiments, the number of outputs of the second beam splitter may be different from the number of outputs of the first beam splitter.

The third output interface is used for connecting with the home optical cable and can be called a home interface. The number of third output interfaces is the same as the number of output terminals of the second beam splitter 60. When the number of output terminals of the second beam splitter 60 is the same as the number of output terminals of the first beam splitter 30, the third output interface and the first output interface may have the same structure.

The spectroscopic apparatus in fig. 10 is the last spectroscopic apparatus in the spectroscopic system shown in fig. 9, and therefore, there is no need to provide a second output interface for connection with the next spectroscopic apparatus.

Fig. 11 is a schematic structural view of another spectroscopic apparatus in fig. 9. The difference from the spectroscopic apparatus shown in fig. 10 is that the first and second spectrometers 30 and 60 in fig. 11 are unequal ratio spectrometers, and the spectroscopic apparatus 1 further comprises a second output interface 50.

In fig. 11, the second beam splitter 60 has one input terminal and n+1 output terminals. Wherein, N output ends are first output ends, and 1 output end is second output end. Wherein N is an integer greater than 1.N may be equal to an integer power of 2, for example, may be equal to 4, 8, 16, or 32, etc.

The input ends of the Y second optical splitters 60 are respectively connected with one output end of the X output ends, the first output end of each second optical splitter 60 is respectively connected with a third output interface, and the second output ends of the Y second optical splitters 60 and the second output end of the first optical splitter 30 are respectively connected with the second output interface 50 to respectively provide one path of optical signals for the second output interface 50. The second output interface 50 is connected to the main housing 10.

The output optical power of each first output end of the second optical splitter 60 is 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. Illustratively, 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 may be set as required, for example, may be 90:10, 85:15, 80:20, 75:25, or 70:30, etc.

The distribution of the output optical power at the respective output ends of the first beam splitter 30 is the same as that of the second beam splitter 60.

In some examples, the second beam splitter 60 may be a separate beam splitter device. In other examples, the second optical splitter 60 includes two cascaded optical splitters, where one optical splitter is a 1:2 unequal ratio optical splitter, the other optical splitter is a 1:n equal ratio optical splitter, one output end of the 1:2 unequal ratio optical splitter is a second output end of the second optical splitter 60, another output end of the 1:2 unequal ratio optical splitter is connected with an input end of the 1:n equal ratio optical splitter, and N output ends of the 1:n equal ratio optical splitter are first output ends of the second optical splitter 60.

In the spectroscopic apparatuses shown in fig. 10 and 11, the spectroscopes (the first spectroscope 30 and the second spectroscope 60) in the main housing 10 can be used by different operators. For example, the first optical splitter 30 is used by one operator and the second optical splitter 60 is used by another operator. When the end user needs to switch different operators, only the output interface of one optical splitter connection of the home-in optical cable needs to be connected to the output interface of the other optical splitter connection.

Fig. 12 is a schematic structural diagram of another optical splitting system according to an embodiment of the present application. As shown in fig. 12, the spectroscopic system includes M spectroscopic devices 1 in cascade. The M spectroscopic devices 1 each adopt a structure for unequal ratio spectroscopic. Each of the optical branching devices 1 is for branching optical signals in all cores of a multi-core optical cable (i.e., a distribution segment optical cable) to which the optical branching system is connected.

In fig. 12, M is equal to 3, and in practical application, the value of M may be set according to practical needs, and there is no necessary association with the number of cores of the multi-core optical cable connected to the optical splitting device, and M may be greater than or equal to or less than the number of cores of the multi-core optical cable.

Fig. 13 is a schematic structural view of a spectroscopic apparatus in fig. 12. As shown in fig. 13, the spectroscopic apparatus 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.

The M first connection interfaces 81 are respectively connected with one output end of the input interface 20, and the first connection interfaces 81 are single-core interfaces and are connected with the main housing 10.

Fig. 14 is a schematic structural view of another spectroscopic apparatus in fig. 12. The difference from the spectroscopic apparatus shown in fig. 13 is that in fig. 14, the spectroscopic apparatus further includes Y second splitters 60 and one second output interface 50. Wherein Y is an integer, Y is greater than 0 and Y is less than or equal to X-1.

The structure of the first beam splitter 30 is described with reference to the embodiment shown in fig. 11, and will not be described herein.

The input ends of the Y second optical splitters 60 are respectively connected with one output end of the X output ends, the first output ends of the Y second optical splitters 60 are respectively connected with a first connection interface 81, and the second output ends of the Y second optical splitters 60 and the second output ends of the first optical splitters 30 are respectively connected with the second output interface 50. The second output interface 50 is connected to the main housing 10.

Illustratively, the Y second splitters 60 are unequal ratio splitters. For example, a 1:2 unequal ratio splitter may be used. The second beam splitter 60 has a first output and a second output. 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 may be set as required, for example, may be 90:10, 85:15, 80:20, 75:25, or 70:30, etc. When implemented, 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 may be equal to the ratio of the optical power output by the second output end of the first optical splitter 30 to the sum of the optical powers output by all the first output ends of the first optical splitter 30.

Alternatively, the spectroscopic apparatuses shown in fig. 13 and 14 may further include the aforementioned auxiliary spectroscopic unit.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

The foregoing description is only one embodiment of the present application and is not intended to limit the present application, and any modifications, equivalent substitutions, improvements, etc. made on the basis of the present application should be included in the scope of protection of the present application.

Claims (18)

1. A spectroscopic apparatus, comprising: a main shell, an input interface, a first output interface group and a first beam splitter,

the input interface is connected with the main shell, is a multi-core interface and comprises X output ends, and X is an integer and is more than 1;

the first output interface group comprises a plurality of first output interfaces, and the first output interfaces are connected with the main shell and are positioned on the same side wall of the main shell with the input interfaces;

the first optical splitter is located in the main shell, the input end of the first optical splitter is connected with a first output end of the X output ends, and the first output end of the first optical splitter is connected with the first output interface.

2. The light splitting device of claim 1, further comprising a second output interface for connection with another light splitting device, the second output interface being a multi-core interface and being connected with the main housing, the second output interface being on the same side wall of the main housing as the input interface;

The second output interface is connected with at least part of the output ends of the input interfaces.

3. The optical splitter device of claim 2, wherein the second output interface comprises X-1 first inputs and 1 second input,

and the other output ends of the X output ends except the first output ends are respectively connected with the X-1 first input ends, and the second input ends are empty.

4. A spectroscopic device according to claim 3, in which the terminals in the input interface and the second output interface are arranged in the same manner, the position of the first output terminal in the input interface being different from the position of the second input terminal in the second output interface.

5. The light splitting device of claim 4, further comprising a second light 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 with the first output end of the input interface, the first output end of the second optical splitter is connected with the input end of the first optical splitter, so that the input end of the first optical splitter is connected with the first output end of the input interface through the second optical splitter, and Y second output ends of the second optical splitter are connected with Y first connection interfaces;

The first connection interface is a single-core interface and is connected with the main shell.

6. The spectroscopic apparatus according to claim 2, wherein the spectroscopic apparatus further comprises: y second optical splitters and Y third output interface groups, wherein Y is an integer, Y is more than 0 and less than or equal to X-1;

the input ends of the Y second optical splitters are respectively connected with one output end of the X output ends, the first output ends of the Y second optical splitters are respectively connected with one third output interface group of the Y third output interface groups, and the second output ends of the Y second optical splitters and the second output ends of the first optical splitters are both connected with the second output interfaces, so that the second output interfaces are connected with part of the output ends of the input interfaces through the Y second optical splitters;

the third output interface group is connected with the main shell.

7. The light splitting device of claim 2, further comprising Y second light 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 with one output end of the X output ends, the first output ends of the Y second optical splitters are respectively connected with one first connection interface 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 splitters are both connected with the second output interface, so that the second output interface is connected with 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 with the main shell.

8. The light splitting device of claim 1, further comprising 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 with one output end of the input interface, and the first connection interfaces are single-core interfaces and are connected with the main shell.

9. The light splitting device of claim 1, further comprising a second light 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 with the first output end of the input interface, the first output end of the second optical splitter is connected with the input end of the first optical splitter, so that the input end of the first optical splitter is connected with the first output end of the input interface through the second optical splitter, and Y second output ends of the second optical splitter are connected with Y first connection interfaces;

the first connection interface is a single-core interface and is connected with the main shell.

10. The spectroscopic apparatus as set forth in claim 1, further comprising: y second optical splitters and Y third output interface groups, wherein Y is an integer, Y is more than 0 and less than or equal to X-1;

The input ends of the Y second light splitters are respectively connected with one output end of the X output ends, and the output ends of the Y second light splitters are respectively connected with one third output interface group of the Y third output interface groups;

the third output interface group is connected with the main shell.

11. The spectroscopic apparatus according to claim 5 and any one of claims 7 to 9, characterized in that the spectroscopic apparatus further comprises: the auxiliary shell, the second connection interface, the expansion beam splitter and the third output interface group;

the second connection interface is connected with the auxiliary shell, and the second connection interface is connected with the first connection interface through optical fibers;

the input end of the expansion beam splitter is connected with the output end of the second connection interface;

the third output interface group comprises a plurality of third output interfaces, the third output interfaces are connected with the auxiliary shell, and the third output interfaces are connected with the output ends of the expansion beam splitters.

12. The spectroscopic apparatus according to any one of claims 1 to 5 and 8 to 10, wherein the first spectroscopic apparatus is an isobaric spectroscopic apparatus.

13. The spectroscopic apparatus according to claim 6 or 7, wherein the first and second spectroscopic apparatuses are unequal ratio spectroscopic apparatuses.

14. The spectroscopic apparatus according to claim 9 or 10, wherein the second spectroscopic apparatus is an isocratic spectroscopic apparatus.

15. The spectroscopic apparatus according to any one of claims 1 to 10, wherein X has a value in the range of 2 to 8.

16. A spectroscopic system, characterized in that the spectroscopic system comprises M spectroscopic devices in cascade; two adjacent light splitting devices are connected through a multi-core optical cable;

wherein the M light splitting devices comprise M-1 first light splitting devices and 1 second light 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 any one of claims 1 and 3 to 5; m is an integer, M is greater than 2 and M is less than or equal to X, and the first beam splitter is an equal ratio beam splitter.

17. A spectroscopic system, characterized in that the spectroscopic system comprises M spectroscopic devices in cascade; two adjacent light splitting devices are connected through a multi-core optical cable;

the M light splitting devices comprise M-1 first light splitting devices and 1 second light splitting device, wherein M is an integer and is more 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.

18. A spectroscopic system, characterized in that the spectroscopic system comprises M spectroscopic devices in cascade; two adjacent light splitting devices are connected through a multi-core optical cable, wherein M is an integer and is more than 2;

wherein the M light splitting devices comprise M-1 first light splitting devices and 1 second light 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.