Optical backplane, communication device and communication system

Abstract

The invention provides an optical backboard, communication equipment and a communication system, and belongs to the technical field of optical communication. The optical backplane comprises a support member, an optical fiber plate and two groups of first optical connectors. The optical fiber plate and the two groups of first optical connectors are fixed on the support member, and the two groups of first optical connectors are respectively located at two sides of a plane where the optical fiber plate is located. The optical fiber plate comprises two groups of first tail fibers, and the two groups of first tail fibers are respectively located at two sides of a plane where the optical fiber plate is located and are respectively connected with the two groups of first optical connectors. According to the optical back plate provided by the invention, the first tail fibers are arranged by fully utilizing the spaces on the two sides of the optical fiber plate. Therefore, the technical problem of tail fiber crossing is improved, the possibility of tail fiber breakage is reduced, and the maintenance of the optical backboard is also facilitated.

Description

Technical Field

[0001] The present disclosure relates to the field of optical communication technologies, and particularly to an optical backplane, a communication device, and a communication system. Background Art

[0002] An optical backplane is used to dock with multiple service boards so that different service boards can achieve optical connections through the optical backplane.

[0003] In the related art, an optical backplane includes an optical fiber board and a plurality of optical connectors. A large number of pigtails extend from the optical fiber board, and each optical connector is connected to at least one pigtail. Then, the optical connectors can achieve optical connections with other optical connectors through the optical fiber board. After the multiple optical connectors of the optical backplane are docked with multiple service boards, different service boards can achieve optical connections through the optical backplane.

[0004] Since the number of pigtails extending from the optical fiber board is large, the crossing of the pigtails is serious, and even the phenomenon of pigtail breakage may occur. Summary of the Invention

[0005] The present disclosure provides an optical backplane, a communication device, and a communication system. Two groups of first optical connectors of the optical backplane are respectively located on both sides of the plane where the optical fiber board is located. Two groups of first pigtails of the optical fiber board are respectively located on both sides of the plane where the optical fiber board is located, and are respectively connected to the two groups of first optical connectors. Since the space on both sides of the optical fiber board is fully utilized for the arrangement of the first pigtails, the phenomenon of first pigtail crossing is improved. The technical solutions of the optical backplane, the communication device, and the communication system are as follows.

[0006] In a first aspect, the present disclosure provides an optical backplane. The optical backplane includes a support member, an optical fiber board, and two groups of first optical connectors. The optical fiber board and the two groups of first optical connectors are fixed to the support member, and the two groups of first optical connectors are respectively located on both sides of the plane where the optical fiber board is located. The optical fiber board includes two groups of first pigtails, and the two groups of first pigtails are respectively located on both sides of the plane where the optical fiber board is located, and are respectively connected to the two groups of first optical connectors.

[0007] Wherein, the first pigtails are interconnected inside the optical fiber board. The two groups of first pigtails of the optical fiber board are respectively connected to the two groups of first optical connectors. Then, a certain first optical connector can achieve optical connections with one or more other first optical connectors through the optical fiber board. The first optical connector is used to dock with the third optical connector of the service board. Then, different service boards can achieve optical connections through the optical backplane.

[0008] In the technical solution provided by the present disclosure, two groups of first optical connectors are respectively located on both sides of the plane where the optical fiber board is located, and two groups of first pigtails are respectively located on both sides of the plane where the optical fiber board is located and are respectively connected to the two groups of first optical connectors. In this way, the space on both sides of the plane where the optical fiber board is located is fully utilized for arranging the first pigtails, reducing the arrangement density of the first pigtails on each side, improving the technical problem of the first pigtails crossing, and reducing the possibility of the first pigtails breaking. In addition, it is also convenient for the later maintenance of the optical backplane.

[0009] In a possible implementation manner, each group of first optical connectors is arranged in a column, and the direction of the column is parallel to the plane where the optical fiber board is located.

[0010] In a possible implementation manner, one column of first optical connectors is in one-to-one correspondence with the other column of first optical connectors. In this way, two first optical connectors in different columns can not only dock the same service board, but also dock different service boards respectively, and the application scenarios of the optical backplane are more extensive.

[0011] In a possible implementation manner, the optical fiber board has opposite first and second sides. The first optical connector is close to the second side and far from the first side. The first fiber outlet position of the first pigtail is located on the first side of the optical fiber board.

[0012] In the technical solution provided by the present disclosure, by setting the first fiber outlet position on the first side of the optical fiber board far from the first optical connector, the first pigtail has enough space for bending, avoiding the deterioration of the optical transmission performance of the first pigtail due to too small bending radius of the first pigtail. At the same time, a larger distance can also allow a larger length tolerance for the first pigtail.

[0013] In a possible implementation manner, in the projection of the optical backplane along the first direction, each first optical connector is opposite to the first fiber outlet position of the first pigtail connected to the first optical connector. Wherein, the first side and the second side are arranged along the first direction. The first direction can also be referred to as the width direction of the optical fiber board.

[0014] In the technical solution provided by the present disclosure, by setting each first optical connector to be opposite to the first fiber outlet position of the first pigtail connected to the first optical connector, it can be ensured that there is no crossing between the first pigtails connected to different first optical connectors. And it can also reduce the length of the first pigtail and reduce the cost. Moreover, the paths of the first pigtails connected to each first optical connector are the same. Therefore, the fiber routing of the first pigtails can be set in the same way, which improves the assembly efficiency of the optical backplane.

[0015] In a possible implementation manner, the lengths of the two groups of first pigtails are the same.

[0016] The technical solution provided by the present disclosure, by setting the lengths of two sets of first pigtails to be the same, enables all the first pigtails of the fiber optic board to be uniformly set to the same length during the processing of the fiber optic board, instead of setting each first pigtail to the corresponding target length respectively, which can reduce the processing complexity of the fiber optic board.

[0017] In a possible implementation, the optical backplane further includes a limiting component. The limiting component is connected to the fiber optic board or the support member. The limiting component is used to limit the shape of the first pigtail, such that along the first direction, the first pigtail is in a wavy shape. Wherein, the first side and the second side are arranged along the first direction.

[0018] The technical solution provided by the present disclosure, by setting the limiting component to limit the first pigtail into a wavy shape, enables the first pigtail to absorb the excess length (or called absorption tolerance) in the form of a wavy shape, instead of absorbing the excess length in the way of coiling the optical fiber. The fiber routing of the first pigtail is simpler and the occupied space is also smaller.

[0019] In a possible implementation, there are multiple connection positions between the limiting component and the first pigtail. The multiple connection positions are arranged along the first direction, and along the first direction, the distances of the multiple connection positions from the fiber optic board are staggered in an alternating manner of one far and one near. In this way, the first pigtail can be maintained in a wavy shape.

[0020] In a possible implementation, the limiting component includes multiple limiting members. The multiple limiting members are arranged along the first direction, and there is at least one connection position between each limiting member and the first pigtail.

[0021] In a possible implementation, the limiting member includes multiple card slots. The distances of the multiple card slots from the fiber optic board are different, and the first pigtail is snap-fitted into one of the card slots.

[0022] The technical solution provided by the present disclosure, by setting the limiting member to include multiple card slots, enables the connection position of the first pigtail to be adjusted by switching the card slot into which the first pigtail is snap-fitted, and further enables the shape of the first pigtail to be adjusted.

[0023] In a possible implementation, the optical backplane further includes a second optical connector. The second optical connector is fixed to the support member, and the orientation of the second optical connector is opposite to that of the first optical connector. The fiber optic board further includes a second pigtail, and the second pigtail is connected to the second optical connector.

[0024] The technical solution provided by the present disclosure, by setting the optical backplane to further include a second optical connector, increases the density of the optical connectors included in the optical backplane. Moreover, the orientations of the first optical connector and the second optical connector are opposite, realizing a double-sided optical output port of the optical backplane.

[0025] In a possible implementation, the second optical connector is used to connect to the second optical connector of another optical backplane to implement the connection of the communication devices where the two optical backplanes are located. Among them, the second optical connector can be a multi push on (MPO) connector.

[0026] In a possible implementation, the optical backplane includes two groups of second optical connectors, and the two groups of second optical connectors are located on both sides of the plane where the optical fiber board is located. The optical fiber board includes two groups of second pigtails, and the two groups of second pigtails are located on both sides of the plane where the optical fiber board is located and are respectively connected to the two groups of second optical connectors.

[0027] In the technical solution provided by the present disclosure, the two groups of second optical connectors are respectively located on both sides of the plane where the optical fiber board is located, and the two groups of second pigtails are respectively located on both sides of the plane where the optical fiber board is located and are respectively connected to the two groups of second optical connectors. In this way, the space on both sides of the plane where the optical fiber board is located is fully utilized for the arrangement of the second pigtails, the technical problem of the second pigtails crossing is improved, and the possibility of the second pigtails breaking is reduced.

[0028] In a possible implementation, the optical fiber board has opposite first and second sides. The first optical connector is close to the second side, and the second optical connector is close to the first side. The first fiber output position of the first pigtail is located on the first side of the optical fiber board, and the second fiber output position of the second pigtail is located on the second side of the optical fiber board.

[0029] In the technical solution provided by the present disclosure, by setting the first fiber output position on the first side of the optical fiber board far from the first optical connector, and setting the second fiber output position on the second side of the optical fiber board far from the second optical connector, the first pigtail and the second pigtail have sufficient space for bending, avoiding the deterioration of the optical transmission performance of the first pigtail and the second pigtail due to the too small bending radius of the first pigtail and the second pigtail. At the same time, a larger distance also allows for a larger length tolerance for the first pigtail and the second pigtail.

[0030] In a possible implementation, the first optical connector and the second optical connector are arranged staggeredly in the second direction. Among them, the second direction is the length direction of the first side and the second side. In the projection of the optical backplane in the third direction, each first optical connector is opposite to the first fiber output position of the first pigtail connected to the first optical connector, and each second optical connector is opposite to the second fiber output position of the second pigtail connected to the second optical connector. Among them, the third direction is perpendicular to the plane where the optical fiber board is located.

[0031] The technical solution provided by the present disclosure, through the above-mentioned arrangement, can make the first fiber output position and the second fiber output position staggered in the second direction, so that there is no intersection between the first pigtail and the second pigtail, and there is no intersection between the first pigtails connected to different first optical connectors and between the second pigtails connected to different second optical connectors.

[0032] In a possible implementation, the support member includes a main body and a raised portion. A portion of the optical fiber board extends into the interior of the main body, and another portion extends into the interior of the raised portion. The first optical connector or the second optical connector is arranged side by side with the raised portion. When the optical backplane is used in a frame, the width direction of the optical fiber board is parallel to the depth direction of the frame.

[0033] The technical solution provided by the present disclosure, by arranging the first optical connector or the second optical connector side by side with the protrusion, allows the first optical connector or the second optical connector and the fiber optic board to share part of the space along the depth direction of the frame, thereby reducing the size of the optical backplane in the depth direction of the frame while ensuring the width of the fiber optic board.

[0034] In a possible implementation, the optical backplane further includes an in-place detection connector, which is fixed to the support. The second optical connector has an electrical port, and the in-place detection connector is electrically connected to the electrical port of the second optical connector through an electric wire. The in-place detection connector is used to detect whether the second optical connector is connected to the optical connector on the opposite side.

[0035] In a second aspect, the present disclosure provides a communication device. The communication device includes a frame, an optical backplane and a service board, wherein the optical backplane is the optical backplane as described in any one of the first aspects. The optical backplane and the service board are located inside the frame, and the service board is connected to a first optical connector of the optical backplane. The service board can also be called a line card (LC) or a line card board.

[0036] In a possible implementation, the optical fiber board in the optical backplane is orthogonal to the service board.

[0037] In a possible implementation, the optical fiber board is parallel to the height direction and the depth direction of the frame.

[0038] In a possible implementation, each service board is connected to two first optical connectors of different groups.

[0039] In a possible implementation, the service board includes a plurality of first service boards and a plurality of second service boards. The plurality of first service boards are connected to a group of first optical connectors, and the plurality of second service boards are connected to another group of first optical connectors. That is, the two groups of first optical connectors are respectively used to connect different service boards.

[0040] In a possible implementation, the communication device further includes a switching fabric board. The switching fabric board is orthogonally arranged with the service board. The service board further includes a first electrical connector, and the switching fabric board includes a second electrical connector, and the first electrical connector and the second electrical connector are docked. Among them, the switching fabric board can receive the electrical layer service transmitted by the service board and perform cross-scheduling on the received electrical layer service. In this way, while the communication device processes optical services, it can also process electrical services, realizing an optical and electrical integrated architecture.

[0041] In a possible implementation, the communication device further includes an electrical backplane. The electrical backplane is located between the optical backplane and the service board, and is also located between the switching fabric board and the service board. The electrical backplane has through holes for the first optical connector or the third optical connector to pass through, so that the first optical connector and the third optical connector can be smoothly docked. The electrical backplane further includes a third electrical connector and a fourth electrical connector. The third electrical connector is docked with the second electrical connector of the switching fabric board, and the fourth electrical connector is docked with the first electrical connector of the first service board or the first electrical connector of the second service board. Among them, the electrical backplane is used to realize the electrical connection and electrical signal transmission between the first service board and the second service board.

[0042] In a third aspect, the present disclosure provides a communication system. The communication system includes a first communication device and a second communication device. Both the first communication device and the second communication device are communication devices of the second aspect. The second optical connector of the optical backplane of the first communication device is connected to the second optical connector of the optical backplane of the second communication device. Description of the Drawings

[0043] Figure 1 is a three-dimensional schematic diagram of a communication device provided by an embodiment of the present disclosure;

[0044] Figure 2 is a three-dimensional schematic diagram of the first optical backplane and service board provided by an embodiment of the present disclosure;

[0045] Figure 3 is a three-dimensional schematic diagram of the first optical backplane provided by an embodiment of the present disclosure;

[0046] Figure 4 is provided by an embodiment of the present disclosure Figure 3 is a top view of the optical backplane shown;

[0047] Figure 5 is a schematic diagram of a projection of an optical backplane along a first direction provided by an embodiment of the present disclosure;

[0048] Figure 6 is a three-dimensional schematic diagram of an optical fiber board and a limiting component provided by an embodiment of the present disclosure;

[0049] Figure 7 is a schematic diagram of an optical backplane with a first pigtail in a wavy shape provided by an embodiment of the present disclosure;

[0050] Figure 8 is a schematic diagram of a limiting member provided by an embodiment of the present disclosure;

[0051] Figure 9 is a three-dimensional schematic diagram of a second optical backplane provided by an embodiment of the present disclosure;

[0052] Figure 10 is a three-dimensional schematic diagram of a third optical backplane provided by an embodiment of the present disclosure;

[0053] Figure 11 is a three-dimensional schematic diagram of the third optical backplane from another angle provided by an embodiment of the present disclosure;

[0054] Figure 12 is provided by an embodiment of the present disclosure Figure 10 and Figure 11 top view of the optical backplane in;

[0055] Figure 13 is a schematic diagram of the positional relationship between a first optical connector and a second optical connector provided by an embodiment of the present disclosure;

[0056] Figure 14 is a schematic diagram of a projection of an optical backplane along a first direction provided by an embodiment of the present disclosure;

[0057] Figure 15 is a three-dimensional schematic diagram of a fourth optical backplane provided by an embodiment of the present disclosure;

[0058] Figure 16 is a schematic diagram of a first communication device provided by an embodiment of the present disclosure;

[0059] Figure 17 is a three-dimensional schematic diagram of a second optical backplane and a service board provided by an embodiment of the present disclosure;

[0060] Figure 18 is a schematic diagram of a second communication device provided by an embodiment of the present disclosure;

[0061] Figure 19 is a schematic diagram of a third communication device provided by an embodiment of the present disclosure;

[0062] Figure 20 is a schematic diagram of a fourth communication device provided by an embodiment of the present disclosure;

[0063] Figure 21 is a schematic diagram of a communication system provided by an embodiment of the present disclosure.

[0064] Legend Explanation

[0065] 100, chassis; 200, optical backplane; 300, service board; 300a, first service board; 300b, second service board; 301, third optical connector; 302, first electrical connector; 400, fan; 500, switching fabric board; 501, second electrical connector; 600, electrical backplane; 601, third electrical connector; 602, fourth electrical connector;

[0066] 1, support member; 11, main body portion; 12, protruding portion;

[0067] 2, optical fiber board; 20, plane; 21, first side; 210, first fiber outlet position; 211, first pigtail; 22, second side; 220, second fiber outlet position; 221, second pigtail;

[0068] 3, first optical connector; 31, first critical plane; 32, second critical plane;

[0069] 4, limiting component; 40, connection position; 41, limiting member; 410, card slot;

[0070] 5, second optical connector;

[0071] 6, in - position detection connector. Detailed implementation manners

[0072] As Figure 1 and Figure 2 shown, an embodiment of the present disclosure provides a communication device. The communication device includes a chassis 100, an optical backplane 200, and a plurality of service boards 300. The optical backplane 200 and the plurality of service boards 300 are located inside the chassis 100. The optical backplane 200 is docked with the plurality of service boards 300, and different service boards 300 can achieve optical connection through the optical backplane 200. Among them, as Figure 1 and Figure 2 shown, the X - axis direction is the width direction of the chassis 100, the Y - axis direction is the depth direction of the chassis 100, and the Z - axis direction is the height direction of the chassis 100.

[0073] In the related art, the optical backplane 200 includes an optical fiber board and a plurality of optical connectors. The optical fiber board extends a large number of pigtails, and different pigtails are interconnected inside the optical fiber board. Each optical connector is connected to at least one pigtail, so that the optical connector can achieve optical connection with other optical connectors through the optical fiber board. After the plurality of optical connectors of the optical backplane 200 are docked with the plurality of service boards 300, different service boards 300 can achieve optical connection through the optical backplane 200.

[0074] In the related art, the optical connector is located on one side of the plane where the optical fiber board is located, and due to the large number of pigtails, the pigtail crossing phenomenon is serious, and even the pigtail breakage may occur.

[0075] In view of the above technical problems, an embodiment of the present disclosure provides an optical backplane 200. As Figures 2 - 4 shown, the optical backplane 200 includes a support member 1, an optical fiber board 2, and two groups of first optical connectors 3. The optical fiber board 2 and the two groups of first optical connectors 3 are fixed to the support member 1, and the two groups of first optical connectors 3 are respectively located on both sides of the plane 20 where the optical fiber board 2 is located. The optical fiber board 2 includes two groups of first pigtails 211, and the two groups of first pigtails 211 are respectively located on both sides of the plane 20 where the optical fiber board 2 is located, and are respectively connected to the two groups of first optical connectors 3.

[0076] Among them, the first pigtails 211 are interconnected inside the optical fiber board 2. The two groups of first pigtails 211 of the optical fiber board 2 are respectively connected to the two groups of first optical connectors 3, so that a certain first optical connector 3 can realize optical connection with one or more other first optical connectors 3 through the optical fiber board 2. In some examples, the first pigtail 211 has a connector, such as a mechanical transfer (MT) connector, and the connector is inserted into the first optical connector 3 to realize the connection between the first pigtail 211 and the first optical connector 3. The first optical connector 3 is used to dock with the third optical connector 301 of the service board 300, so that different service boards 300 can realize optical connection through the optical backplane 200.

[0077] In the technical solution provided by the embodiment of the present disclosure, the two groups of first optical connectors 3 are respectively located on both sides of the plane 20 where the optical fiber board 2 is located, and the two groups of first pigtails 211 of the optical fiber board 2 are respectively located on both sides of the plane 20 and are respectively connected to the two groups of first optical connectors 3. In this way, the space on both sides of the plane 20 where the optical fiber board 2 is located is fully utilized for the arrangement of the first pigtails 211, the arrangement density of the first pigtails 211 on each side is reduced, the technical problem of the intersection of the first pigtails 211 is improved, and the possibility of the first pigtails 211 breaking is reduced. In addition, it is also convenient for the later maintenance of the optical backplane 200.

[0078] The embodiment of the present disclosure does not limit the arrangement manner of the two groups of first optical connectors 3. In some examples, as Figure 3 and Figure 4 shown, each group of first optical connectors 3 is arranged in a column, where the direction of the column is parallel to the plane 20 where the optical fiber board 2 is located. In some examples, as Figure 3 and Figure 4 shown, each column of first optical connectors 3 is opposite to the other column of first optical connectors 3 one by one. In this way, two first optical connectors 3 in different columns can either dock with the same service board 300 or dock with different service boards 300 respectively. Thus, the application scenarios of the optical backplane 200 are expanded.

[0079] Of course, in some other examples, each group of the first optical connectors 3 can also be arranged in two columns or more. The embodiments of the present disclosure do not limit the specific number of columns. In addition, the number of columns included in the two groups of the first optical connectors 3 can be the same or different. For example, one group of the first optical connectors 3 includes one column of the first optical connectors 3, and the other group of the first optical connectors 3 includes two columns of the first optical connectors 3.

[0080] Next, an exemplary description will be given of the first outgoing fiber position 210 of the first pigtail 211 on the optical fiber board 2. Generally speaking, the optical fiber board 2 has opposite first side 21 and second side 22. Then, the first outgoing fiber position 210 can be located on the first side 21 or on the second side 22.

[0081] In some examples, as Figure 4 shown, the first optical connector 3 is close to the second side 22 and far from the first side 21. The first outgoing fiber position 210 of the first pigtail 211 is located on the first side 21 of the optical fiber board 2.

[0082] The technical solution provided by the embodiments of the present disclosure, by setting the first outgoing fiber position 210 on the first side 21 of the optical fiber board 2 that is far from the first optical connector 3, enables the first pigtail 211 to have sufficient space for bending, avoiding the bending radius of the first pigtail 211 from being too small, which may cause the optical transmission performance of the first pigtail 211 to deteriorate. At the same time, a larger space can also allow a larger length tolerance for the first pigtail 211.

[0083] Of course, in some other examples, the first outgoing fiber position 210 can also be located on the second side 22 of the optical fiber board 2. For this case, in order to avoid the bending radius of the first pigtail 211 from being too small, there are the following two solutions. The first solution is to increase the distance between the second side 22 of the optical fiber board 2 and the first optical connector 3, so that the first pigtail 211 has sufficient space for bending. The second solution is to guide the first pigtail 211 to a distant place for fiber coiling, and then lead the first pigtail 211 back and connect it to the first optical connector 3.

[0084] To further improve the technical problem of the first pigtail 211 crossing, in some examples, as Figure 5 shown, on the projection of the optical backplane 200 along the first direction (Y-axis direction, which is also the width direction of the optical fiber board 2), each first optical connector 3 is opposite to the first outgoing fiber position 210 of the first pigtail 211 connected to the first optical connector 3. Among them, the first side 21 and the second side 22 are arranged along the first direction.

[0085] In this way, first, it can ensure that there is no crossing between the first pigtails 211 connected by different first optical connectors 3. Second, it can reduce the length of the first pigtails 211 and lower the cost. Third, the paths of the first pigtails 211 connected by each first optical connector 3 are the same. Therefore, the fiber routing of the first pigtails 211 can be set in the same way, improving the assembly efficiency of the optical backplane 200. It can be understood that if the first optical connector 3 and the first fiber output position 210 of the first pigtail 211 connected to the first optical connector 3 are not opposite, the paths of the respective first pigtails 211 will be different, and the fiber routing method needs to be set separately for each first pigtail 211, making the assembly of the optical backplane 200 very complicated.

[0086] It should be added that the fact that the first optical connector 3 is opposite to the first fiber output position 210 of the first pigtail 211 connected to the first optical connector 3 means that, as Figure 5 shown, the first fiber output position 210 of the first pigtail 211 is located between the first critical plane 31 and the second critical plane 32 of the corresponding first optical connector 3. Among them, the first critical plane 31 is the extension plane of the first side wall of the first optical connector 3, the second critical plane 32 is the extension plane of the second side wall of the first optical connector 3, the first side wall and the second side wall are opposite, and are arranged in sequence along the length direction of the first side 21.

[0087] In addition, since each first optical connector 3 is opposite to the first fiber output position 210 of the first pigtail 211 connected to the first optical connector 3, the lengths of the multiple first pigtails 211 can be set to be the same. In this way, when processing the optical fiber board 2, only all the first pigtails 211 need to be uniformly set to the same length, instead of setting each first pigtail 211 to the corresponding target length separately, which can reduce the processing difficulty of the optical fiber board 2.

[0088] In some examples, as Figure 6 and Figure 7 shown, the optical backplane 200 further includes a limiting component 4. The limiting component 4 is connected to the optical fiber board 2 or the support member 1. The limiting component 4 is used to limit the shape of the first pigtail 211 so that, along the first direction (Y-axis direction), the first pigtail 211 is in a wavy shape. Among them, the first side 21 to the second side 22 are arranged along the first direction.

[0089] The technical solution provided by the embodiments of the present disclosure limits the first pigtail 211 into a wavy shape by setting the limiting component 4, so that the first pigtail 211 absorbs the excess length (or called absorption tolerance) in the form of a wavy shape, without the need to absorb the excess length in the way of coiling the fiber. The fiber routing of the first pigtail 211 is simpler and occupies less space.

[0090] Next, an exemplary description of the limiting method of the limiting component 4 will be given. In some examples, asFigure 6 and Figure 7 As shown in Figure 7 , there are multiple connection positions 40 between the limit component 4 and the first pigtail 211. The multiple connection positions 40 are arranged along the first direction (Y-axis direction), and along the first direction, the distances of the multiple connection positions 40 from the optical fiber board 2 are staggered in an alternating far and near manner. In this way, the first pigtail 211 can be restricted to a wavy shape.

[0091] In some examples, as Figure 6 and Figure 7 shown, the optical backplane 200 includes multiple limit components 4. Each limit component 4 is used to restrict the first pigtail 211 connected by a first optical connector 3 to a wavy shape.

[0092] In some examples, as Figure 6 and Figure 7 shown, the limit component 4 includes multiple limit members 41. The multiple limit members 41 are arranged along the first direction, and there is at least one connection position 40 between each limit member 41 and the first pigtail 211.

[0093] In some examples, as Figures 6 - 8 shown, the limit member 41 includes multiple card slots 410. The distances of the multiple card slots 410 from the optical fiber board 2 are different, and the first pigtail 211 is snap-fitted into one card slot 410. In this way, by switching the card slot 410 into which the first pigtail 211 is snap-fitted, the connection position 40 of the first pigtail 211 can be adjusted, and thus the shape of the first pigtail 211 can be adjusted. Among them, the structure of the limit member 41 can be as Figure 6 shown, or can be as Figure 8 shown.

[0094] In some examples, as Figures 9 - 12 shown, the optical backplane 200 further includes a second optical connector 5. The second optical connector 5 is fixed to the support member 1, and the orientation of the second optical connector 5 is opposite to that of the first optical connector 3. The optical fiber board 2 further includes a second pigtail 221, and the second pigtail 221 is connected to the second optical connector 5.

[0095] The technical solution provided by the embodiments of the present disclosure improves the density of the optical connectors included in the optical backplane 200 by providing that the optical backplane 200 further includes a second optical connector 5. Moreover, the orientations of the first optical connector 3 and the second optical connector 5 are opposite, realizing dual-sided out-ports of the optical backplane 200.

[0096] In some examples, the second optical connector 5 is used to connect to the second optical connector 5 of other optical backplanes 200 to realize the connection of the communication devices where the two optical backplanes 200 are located. Among them, the second optical connector 5 can be a multi-core push-on (MPO) connector.

[0097] In some other examples, the second optical connector 5 is also used to dock with the service board 300. That is, both the first optical connector 3 and the second optical connector 5 are used to dock with the service board 300, so that both sides of the optical backplane 200 can dock with the service board 300.

[0098] The embodiments of the present disclosure do not limit the number and arrangement of the second optical connectors 5. In some examples, such as Figures 9 - 12 As shown, the optical backplane 200 includes two groups of second optical connectors 5, and the two groups of second optical connectors 5 are respectively located on both sides of the plane 20 where the optical fiber board 2 is located. The optical fiber board 2 includes two groups of second pigtails 221, and the two groups of second pigtails 221 are respectively located on both sides of the plane 20 where the optical fiber board 2 is located, and are respectively connected to the two groups of second optical connectors 5.

[0099] In the technical solution provided by the embodiments of the present disclosure, the two groups of second optical connectors 5 are respectively located on both sides of the plane 20 where the optical fiber board 2 is located, and the two groups of second pigtails 221 are respectively located on both sides of the plane 20 and are respectively connected to the two groups of second optical connectors 5. In this way, the space on both sides of the plane 20 where the optical fiber board 2 is located is fully utilized for the arrangement of the second pigtails 221, the technical problem of the second pigtails 221 crossing is improved, and the possibility of the second pigtails 221 breaking is reduced.

[0100] Next, an exemplary description will be given of the second fiber outlet position 220 of the second pigtail 221 on the optical fiber board 2. In some examples, such as Figure 12 As shown, the first optical connector 3 is close to the second side 22, and the second optical connector 5 is close to the first side 21. Then the second fiber outlet position 220 of the second pigtail 221 is located on the second side 22 of the optical fiber board 2. In this way, by setting the second fiber outlet position 220 of the second pigtail 221 on the second side 22 of the optical fiber board 2 that is far from the second optical connector 5, the second pigtail 221 has enough space to bend, avoiding the bending radius of the second pigtail 221 being too small, which may cause deterioration of the optical transmission performance of the second pigtail 221. At the same time, a larger space can also allow a larger length tolerance for the second pigtail 221.

[0101] Of course, in some other examples, the second fiber outlet position 220 of the second pigtail 221 can also be located on the first side 21 of the optical fiber board 2, and the embodiments of the present disclosure do not make specific limitations on this.

[0102] In some examples, such as Figure 13 and Figure 14As shown in the figure, in order to prevent crossover between the first pigtail fiber 211 and the second pigtail fiber 221, the first optical connector 3 and the second optical connector 5 are arranged staggeredly in the second direction (Z-axis direction). Here, the second direction is the length direction of the first side 21 and the second side 22. Moreover, in the projection of the optical backplane 200 along the third direction (X-axis direction) (similarly in the projection along the second direction), for each first optical connector 3, it is opposite to the first fiber output position 210 of the first pigtail fiber 211 connected to the first optical connector 3, and for each second optical connector 5, it is opposite to the second fiber output position 220 of the second pigtail fiber 221 connected to the second optical connector 5. Here, the third direction is perpendicular to the plane 20 where the fiber board 2 is located.

[0103] In this way, it can be made that the first fiber output position 210 of the first pigtail fiber 211 and the second fiber output position 220 of the second pigtail fiber 221 are staggered in the second direction, so that there is no crossover between the first pigtail fiber 211 and the second pigtail fiber 221. Moreover, there is no crossover between the first pigtail fibers 211 connected to different first optical connectors 3, and there is also no crossover between the second pigtail fibers 221 connected to different second optical connectors 5.

[0104] In some examples, the limiting component 4 is also used to limit the shape of the second pigtail fiber 221, so that along the first direction (Y-axis direction), the second pigtail fiber 221 is also in a wavy shape. In this way, the second pigtail fiber 221 can absorb the excess length (or called absorption tolerance) in the form of a wave, without the need to absorb the excess length in the form of coiling the fiber, and the fiber routing of the second pigtail fiber 221 is simpler and occupies less space.

[0105] In addition, as Figure 9 shown, since the optical backplane 200 further includes the second optical connector 5, it will inevitably increase the size of the optical backplane 200 in the depth direction of the chassis 100. For the case where the size of the optical backplane 200 in the depth direction is limited, it is necessary to reduce the size of the fiber board 2 in the depth direction of the chassis 100, but this is not conducive to the arrangement of the optical fibers in the fiber board 2.

[0106] To solve the above technical problems, in some examples, as Figures 10 - 12 shown, the support member 1 includes a main body portion 11 and a convex portion 12. A part of the fiber board 2 extends into the inside of the main body portion 11, and another part extends into the inside of the convex portion 12. The second optical connector 5 is arranged side by side with the convex portion 12. Here, the second optical connector 5 can be connected to the main body portion 11.

[0107] The technical solution provided by the embodiments of the present disclosure, by arranging the second optical connector 5 side by side with the convex portion 12, enables the second optical connector 5 and the fiber board 2 to share part of the space in the depth direction of the chassis 100, and reduces the size of the optical backplane 200 in the depth direction of the chassis 100 while ensuring the width of the fiber board 2.

[0108] In some other examples, the first optical connector 3 may also be arranged side by side with the convex portion 12. In this case, the first optical connector 3 and the optical fiber board 2 share a part of the space in the depth direction of the chassis 100. While ensuring the width of the optical fiber board 2, the size of the optical backplane 200 in the depth direction of the chassis 100 is also reduced.

[0109] Of course, when the size of the optical backplane 200 in the depth direction of the chassis 100 is not limited, or when the width of the optical fiber board 2 can be made very small, the support member 1 may not be provided with the convex portion 12, but may be arranged as Figure 9 shown.

[0110] In some examples, as Figure 15 shown, the optical backplane 200 further includes an in-position detection connector 6. The in-position detection connector 6 is fixed to the support member 1. The second optical connector 5 has an electrical port, and the in-position detection connector 6 is electrically connected to the electrical port of the second optical connector 5 through a wire.

[0111] Among them, the in-position detection connector 6 is used to detect whether the second optical connector 5 is connected in place with the optical connector on the opposite side. The in-position detection connector 6 may be an EID connector.

[0112] The embodiment of the present disclosure also provides a communication device. As Figure 1 , Figure 2 and Figures 16 - 20 shown, the communication device includes a chassis 100, an optical backplane 200, and a service board 300. The optical backplane 200 and the service board 300 are located inside the chassis 100, and the service board 300 is docked with the first optical connector 3 of the optical backplane 200. Among them, the service board 300 may also be referred to as a line card (LC) or a line card board.

[0113] In some examples, the optical backplane 200 is arranged orthogonally to the service board 300, or it can be said that the optical fiber board 2 is arranged orthogonally to the service board 300.

[0114] In some examples, as Figure 1 and Figure 2 shown, the optical fiber board 2 is parallel to the height direction and the depth direction of the chassis 100.

[0115] In some examples, as Figure 16 shown, each service board 300 is docked with two first optical connectors 3 in different groups.

[0116] In some examples, as Figure 17 and Figure 18As shown, the service board 300 includes a plurality of first service boards 300a and a plurality of second service boards 300b. The plurality of first service boards 300a are docked with a group of first optical connectors 3, and the plurality of second service boards 300b are docked with another group of first optical connectors 3. That is, the two groups of first optical connectors 3 are respectively used to dock with different service boards 300.

[0117] In some examples, as Figure 19 shown, the communication device further includes a switching fabric board 500, and the switching fabric board 500 is orthogonally arranged with the service board 300. The service board 300 further includes a first electrical connector 302, and the switching fabric board 500 includes a second electrical connector 501. The first electrical connector 302 and the second electrical connector 501 are docked. Thus, the electrical connection between the switching fabric board 500 and the plurality of service boards 300 is realized. Among them, the switching fabric board 500 can receive the electrical layer services transmitted by the service board 300 and perform cross-scheduling on the received electrical layer services. In this way, while the communication device processes optical services, it can also process electrical services, realizing an optical and electrical integrated architecture.

[0118] In some examples, as Figure 20 shown, the communication device further includes an electrical backplane 600. The electrical backplane 600 is located between the optical backplane 200 and the service board 300, and is located between the switching fabric board 500 and the service board 300 (the first service board 300a and the second service board 300b). The electrical backplane 600 has through holes for the first optical connector 3 or the third optical connector 301 to pass through, so that the first optical connector 3 and the third optical connector 301 can be smoothly docked without being blocked by the electrical backplane 600. The electrical backplane 600 further includes a third electrical connector 601 and a fourth electrical connector 602. The third electrical connector 601 is docked with the second electrical connector 501 of the switching fabric board 500, and the fourth electrical connector 602 is docked with the first electrical connector 302 of the service board 300. Among them, the electrical backplane 600 is used to realize the electrical connection and electrical signal transmission between the first service board 300a and the second service board 300b.

[0119] In some examples, as Figure 16 、 Figures 18 - 20 shown, the communication device further includes a fan 400 to reduce the temperature of each component in the communication device. The wind direction formed by the fan 400 can be the direction shown by the arrow F in the figure.

[0120] The embodiments of the present disclosure also provide a communication system. As Figure 21 shown, the communication system includes a first communication device and a second communication device. The second optical connector 5 of the optical backplane 200 of the first communication device is connected to the second optical connector 5 of the optical backplane 200 of the second communication device.

[0121] The technical solution provided by the embodiments of the present disclosure increases the communication capacity of the communication system by connecting a first communication device and a second communication device through a second optical connector 5.

[0122] The terms used in the embodiments section of the present disclosure are only for explaining the embodiments of the present disclosure and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should have the ordinary meanings understood by those of ordinary skill in the field to which the present disclosure pertains. The words "first", "second" and the like used in the specification and claims of the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. Words such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships, and when the absolute position of the object being described changes, the relative position relationships may also change accordingly. "Multiple" means two or more, unless otherwise clearly defined.

[0123] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. An optical backplane, characterized in that, The optical backplane (200) includes a support member (1), an optical fiber board (2), and two groups of first optical connectors (3); The optical fiber board (2) and the two groups of first optical connectors (3) are fixed to the support member (1), and the two groups of first optical connectors (3) are respectively located on both sides of the plane (20) where the optical fiber board (2) is located; The optical fiber board (2) includes two groups of first pigtails (211), the two groups of first pigtails (211) are respectively located on both sides of the plane (20), and are respectively connected to the two groups of first optical connectors (3).

2. The optical backplane according to claim 1, wherein The optical fiber board (2) has opposite first side (21) and second side (22), the two groups of first optical connectors (3) are close to the second side (22) and far from the first side (21); The first fiber outlet positions (210) of the two groups of first pigtails (211) are located on the first side (21) of the optical fiber board (2).

3. The optical backplane according to claim 2, wherein, In the projection of the optical backplane (200) along the first direction, each of the first optical connectors (3) is opposite to the first fiber outlet position (210) of the first pigtail (211) connected to the first optical connector (3), wherein the first side (21) and the second side (22) are arranged along the first direction.

4. The optical backplane according to claim 2 or 3, characterized in that, The lengths of the two groups of first pigtails (211) are the same.

5. The optical backplane according to any one of claims 2-4, characterized in that, The optical backplane (200) further includes a limiting component (4), and the limiting component (4) is connected to the optical fiber board (2) or the support member (1); The limiting component (4) is used to limit the shape of the first pigtail (211) so that along the first direction, the first pigtail (211) is wavy, wherein the first side (21) and the second side (22) are arranged along the first direction.

6. The optical backplane according to claim 5, wherein There are multiple connection positions (40) between the limiting component (4) and the first pigtail (211), the multiple connection positions (40) are arranged along the first direction, and along the first direction, the distances of the multiple connection positions (40) from the optical fiber board (2) are staggered in an alternating manner of one far and one near.

7. The optical backplane according to claim 6, characterized in that, The limiting component (4) includes multiple limiting members (41), the multiple limiting members (41) are arranged along the first direction, and each limiting member (41) has at least one of the connection positions (40) with the first pigtail (211).

8. The optical backplane according to claim 7, wherein, The limiting member (41) includes multiple card slots (410), the distances of the multiple card slots (410) from the optical fiber board (2) are different, and the first pigtail (211) is snap-fitted in one of the card slots (410).

9. The optical backplane according to any one of claims 1-8, characterized in that The optical backplane (200) further includes a second optical connector (5), the second optical connector (5) is fixed to the support member (1), and the orientation of the second optical connector (5) is opposite to the orientation of the first optical connector (3); The optical fiber board (2) further includes a second pigtail (221), and the second pigtail (221) is connected to the second optical connector (5).

10. The optical backplane according to claim 9, wherein The optical backplane (200) includes two groups of second optical connectors (5), and the two groups of second optical connectors (5) are respectively located on both sides of the plane (20) where the optical fiber board (2) is located; The optical fiber board (2) includes two groups of second pigtails (221), the two groups of second pigtails (221) are located on both sides of the plane (20), and are respectively connected to the two groups of second optical connectors (5).

11. The optical backplane according to claim 9 or 10, characterized in that, The optical fiber board (2) has opposite first side (21) and second side (22), the two groups of first optical connectors (3) are close to the second side (22), and the second optical connectors (5) are close to the first side (21); The first fiber outlet position (210) of the first pigtail (211) is located on the first side (21) of the optical fiber board (2), and the second fiber outlet position (220) of the second pigtail (221) is located on the second side (22) of the optical fiber board (2).

12. The optical backplane according to claim 11, wherein, The first optical connectors (3) and the second optical connectors (5) are arranged staggeredly in the second direction, where the second direction is the length direction of the first side (21) and the second side (22); On the projection of the optical backplane (200) in the third direction, each of the first optical connectors (3) is opposite to the first fiber outlet position (210) of the first pigtail (211) connected to the first optical connector (3), and each of the second optical connectors (5) is opposite to the second fiber outlet position (220) of the second pigtail (221) connected to the second optical connector (5), where the third direction is perpendicular to the plane (20) where the optical fiber board (2) is located.

13. The optical backplane according to any one of claims 9-12, characterized in that, The support member (1) includes a main body portion (11) and a convex portion (12), a part of the optical fiber board (2) extends into the interior of the main body portion (11), and another part extends into the interior of the convex portion (12); The first optical connector (3) or the second optical connector (5) is arranged side by side with the convex portion (12).

14. The optical backplane according to any one of claims 9-13, characterized in that, The optical backplane (200) further includes an in-place detection connector (6), and the in-place detection connector (6) is fixed to the support member (1); The second optical connector (5) has an electrical port, and the in-place detection connector (6) is electrically connected to the electrical port of the second optical connector (5) through an electric wire.

15. A communication device, characterized in that, The communication device includes a chassis (100), an optical backplane (200), and a service board (300), and the optical backplane (200) is the optical backplane according to any one of claims 1-14; The optical backplane (200) and the service board (300) are located inside the chassis (100), and the service board (300) is docked with the first optical connector (3) of the optical backplane (200).

16. The communication device according to claim 15, wherein The optical fiber board (2) in the optical backplane (200) is orthogonal to the service board (300).

17. A communication system, characterized in that, The communication system includes a first communication device and a second communication device, and both the first communication device and the second communication device include the optical backplane (200) according to any one of claims 9-14; The second optical connector (5) of the optical backplane (200) of the first communication device is connected to the second optical connector (5) of the optical backplane (200) of the second communication device.

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