WO2023104198A1

WO2023104198A1 - Multiplexing/demultiplexing device, and co-packaged optics switch system

Info

Publication number: WO2023104198A1
Application number: PCT/CN2022/138034
Authority: WO
Inventors: 苏展
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-12-09
Filing date: 2022-12-09
Publication date: 2023-06-15
Also published as: CN116260514A

Abstract

The present disclosure provides a multiplexing/demultiplexing device, comprising: a multiplexing unit, a demultiplexing unit, an internal connecting end, and an external connecting end. Both ends of the multiplexing unit are respectively connected to the internal connecting end and the external connecting end by means of transmitting optical fibers; both ends of the demultiplexing unit are respectively connected to the internal connecting end and the external connecting end by means of receiving optical fibers; the internal connecting end is used for connecting to an optical port of a co-packaged optics switch in a pluggable manner; and the external connecting end is used for connecting to an optical fiber connector in a pluggable manner. The present disclosure also provides a co-packaged optics switch system.

Description

Multiplexer/demultiplexer device, photoelectric package switch system

Cross References to Related Applications

This application claims priority to Chinese Patent Application No. 202111497458.9 filed on December 9, 2021, the contents of which are hereby incorporated by reference in their entirety.

technical field

The present disclosure relates to the technical field of optical modules, and in particular to a multiplexer/demultiplexer device and a photoelectric package switch system.

Background technique

In many optical interconnection scenarios, wavelength division multiplexing (WDM, Wavelength Division Multiplexing) is required. For example, in the internal optical interconnection of the data center, the leaf (Leaf) switch to the spine (Spine) switch has an optical transmission requirement of 2km level, and the optical transmission link between the two is usually wavelength division multiplexing, such as coarse wave Division multiplexing (CWDM, Coarse Wavelength Division Multiplexing), etc. For this reason, the optical module of the switch needs to be able to realize the function of multiplexing and demultiplexing. For example, if the bandwidth of the optical transmission link between the upper leaf switch and the spine switch is 400G, the code for its optical transmission application is 400G-FR4 (IEEE400G 2km standard application code).

Referring to Figure 1 and Figure 2, in the photoelectric package (CPO) technology, the optical module is divided into two parts, the light source module 94 is reserved on the panel of the CPO switch for easy plugging and replacement, and the modulation function is integrated in the CPO switch In the photoelectric sealing module 91 around the switching chip (Switch). For this reason, the multiplexing and demultiplexing function also needs to be integrated in the photoelectric sealing module 91, but this leads to high technical difficulty and difficult realization of the photoelectric sealing module 91, or causes the volume and size of the photoelectric sealing module 91 to be large, and the pigtail 92 side parts are suspended in the air, the stability and shock resistance are poor, and it is not easy to replace.

Contents of the invention

The present disclosure provides a wavelength multiplexing and demultiplexing device, and a photoelectric package switch system.

In the first aspect, an embodiment of the present disclosure provides a multiplexing and demultiplexing device, which includes: a multiplexing unit, a demultiplexing unit, an inner connection end, and an outer connection end, wherein the two ends of the multiplexing unit are respectively connected by a transmission optical fiber and The inner connection end is connected to the outer connection end; the two ends of the splitter unit are respectively connected to the inner connection end and the outer connection end through receiving optical fibers; the inner connection end is used for pluggable connection to the optical port of the photoelectric package switch ; The outer connection end is used for pluggable connection to the optical fiber connector.

In the second aspect, an embodiment of the present disclosure provides a photoelectric package switch system, which includes: a photoelectric package switch; and at least one multiplexer/demultiplexer device according to the first aspect above, the internal connection terminal of the multiplexer/demultiplexer device is plugged into Connect to the optical port of the photoelectric package switch.

Description of drawings

Fig. 1 is a top view structural schematic diagram of a CPO switch;

FIG. 2 is a schematic side view structural diagram of the CPO switch in FIG. 1;

Fig. 3 is a schematic diagram of the decomposed structure of the connection between the optical port and the optical fiber connector of the CPO switch of Fig. 1;

FIG. 4 is a block diagram of a multiplexing and demultiplexing device provided by an embodiment of the present disclosure;

FIG. 5 is a block diagram of another multiplexing and demultiplexing device provided by an embodiment of the present disclosure;

FIG. 6 is a block diagram of the multiplexer/demultiplexer device of the photoelectric package switch system in Example 1 of the embodiment of the present disclosure;

FIG. 7 is a schematic diagram of the signal relationship during demultiplexing and multiplexing in the multiplexing and demultiplexing device of the photoelectric package switch system in Example 1 of the embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a multiplexer/demultiplexer device of an optoelectronic package switch system in Example 1 of an embodiment of the present disclosure;

FIG. 9 is a structural schematic diagram from another angle of the multiplexer/demultiplexer device of the photoelectric package switch system in Example 1 of the embodiment of the present disclosure;

FIG. 10 is a partial perspective structural diagram of the multiplexer/demultiplexer device of the photoelectric package switch system in Example 1 of the embodiment of the present disclosure;

FIG. 11 is a block diagram of a multiplexer/demultiplexer device of an optoelectronic package switch system in Example 2 of an embodiment of the present disclosure;

FIG. 12 is a schematic diagram of the signal relationship during demultiplexing and multiplexing in the multiplexing and demultiplexing device of the photoelectric package switch system in Example 2 of the embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of the multiplexer/demultiplexer device of the photoelectric package switch system in Example 2 of the embodiment of the present disclosure;

FIG. 14 is a structural schematic diagram from another angle of the multiplexer/demultiplexer device of the photoelectric package switch system in Example 2 of the embodiment of the present disclosure;

FIG. 15 is a schematic structural diagram of a multiplexer/demultiplexer device of an optoelectronic package switch system in Example 3 of an embodiment of the present disclosure;

FIG. 16 is a structural schematic diagram from another angle of the multiplexer/demultiplexer device of the photoelectric package switch system in Example 3 of the embodiment of the present disclosure;

Among them, the meaning of reference signs is:

101. Female MT ferrule array; 1011. MPO/MTP optical connector adapter with female MT ferrule;

102, 32-core transmission fiber; 103, 4:1 CWDM multiplexer/demultiplexer 8 arrays;

104. 8-core sending optical fiber; 105. MPO optical connector adapter with male head;

106, 8-core receiving optical fiber; 107, 1:4 CWDM splitter 8 array;

108, 32-core receiving optical fiber;

211. Protrusion; 212. Circlip;

22. Pull ring; 29. Shell;

91. Photoelectric sealing module; 92. Pigtail;

93. Optical port; 931. Male optical connector;

932. Male MT ferrule; 94. Light source module;

98. Adapter; 99. Female optical connector.

Detailed ways

In order for those skilled in the art to better understand the technical solutions of the present disclosure, the following describes in detail the multiplexer/demultiplexer device and the photoelectric package switch system provided by the embodiments of the present disclosure with reference to the accompanying drawings.

The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms, and the present disclosure should not be construed as limited to the embodiments set forth below. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The drawings of the embodiments of the present disclosure are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the description, and are used together with the detailed embodiments to explain the present disclosure, and do not constitute a limitation to the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing detailed embodiments with reference to the accompanying drawings.

The present disclosure may be described with reference to plan views and/or cross-sectional views by way of idealized schematic views of the present disclosure. Accordingly, the example illustrations may be modified according to manufacturing techniques and/or tolerances.

In the case of no conflict, various embodiments of the present disclosure and various features in the embodiments can be combined with each other.

The terms used in the present disclosure are for describing specific embodiments only, and are not intended to limit the present disclosure. As used in this disclosure, the term "and/or" includes any and all combinations of one or more of the associated listed items. As used in this disclosure, the singular forms "a" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. As used in the present disclosure, the terms "comprising", "made up of" designate the presence of said features, integers, steps, operations, elements and/or components, but do not exclude the presence or addition of one or more other features, Integrals, steps, operations, elements, components and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art and the present disclosure, and will not be interpreted as having idealized or excessive formal meanings, Unless the disclosure expressly so limited.

The present disclosure is not limited to the embodiments shown in the drawings, but includes modifications of configurations formed based on manufacturing processes. Accordingly, the regions illustrated in the figures have schematic properties, and the shapes of the regions shown in the figures illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

In some related technologies, the structure of the 1RU (rack unit, Rack Unit) photoelectric package (CPO) switch in the data center can refer to Fig. 1 and Fig. 2, wherein, a plurality of photoelectric package modules 91 are arranged around the switching chip of the CPO switch , and the pigtail of the photoelectric sealing module 9 is connected to the optical port 93 (I/O port) on the panel, and the optical port 93 is also used to connect with external optical fiber connectors.

For example, referring to FIG. 3 , the optical port 93 on the panel of the CPO switch can be a male optical connector 931 or a male mechanical transmission (MT) ferrule 932 (there is an adapter in the CPO switch), while the optical fiber connector can be a female optical connector. Connector 99, the two are connected by an adapter 98 installed on the panel.

The multiplexing and demultiplexing functions of the CPO switch are integrated in the above optoelectronic sealing module. There are two main implementation forms: the first one is directly implemented on the silicon photonic chip of the photoelectric sealing module, but this method has great impact on the technology. High requirements, difficult to implement, and in the case of coarse wavelength division multiplexing (CWDM, Coarse Wavelength Division Multiplexing), dense wavelength division multiplexing (DWDM, Dense Wavelength Division Multiplexing), fine wavelength division multiplexing (LWDM, LAN Wavelength Division Multiplexing) When waiting for different multiplexer/demultiplexer requirements, it is necessary to redesign and tape out the optoelectronic package module; the second is to couple an additional multiplexer/demultiplexer module on the edge of the silicon photonic chip of the optoelectronic package module, but this method will increase the The length and volume of the large photoelectric sealing module cause the side part of the pigtail to hang in the air, making it less stable and shock-resistant, and not easy to replace.

In view of the above problems, in a first aspect, embodiments of the present disclosure provide an apparatus for multiplexing and demultiplexing. The multiplexer/demultiplexer device is used to be connected to a photoelectric package (CPO) switch, so that the whole of the CPO switch and the multiplexer/demultiplexer device (CPO switchboard system) can have the multiplexer/demultiplexer function.

Referring to Fig. 4 , the multiplexer/demultiplexer device of the disclosed embodiment includes: a multiplexer unit, whose two ends are respectively connected to the inner connection end and the outer connection end through a sending optical fiber; The external connection end is connected with the external connection end; the internal connection end is used for pluggable connection to the optical port of the photoelectric sealing switch; and the external connection end is used for pluggable connection to the optical fiber connector.

Referring to Fig. 4 and Fig. 5, there is the multiplexing unit (such as M:N multiplexer array) for realizing the multiplexing function in the multiplexing and demultiplexing device of the embodiment of the present disclosure, and the demultiplexing unit for realizing the demultiplexing function unit (such as an N:M demultiplexer array); and the multiplexing unit and the demultiplexing unit are respectively connected between the inner connection end and the outer connection end of the multiplexing and demultiplexing device through optical fibers (such as sending optical fibers and receiving optical fibers).

Specifically, the multiplexer array and the multiplexer array may respectively include multiple multiplexers and multiplexers, and the specific number thereof is determined according to the number of channels of optical signals to be processed.

Specifically, with reference to Fig. 5, the transmitting optical fiber and the receiving optical fiber connected between the inner connection end and the multiplexing unit and the demultiplexing unit can be M cores, and the external connecting end is connected to the multiplexing unit and the demultiplexing unit respectively. The transmitting optical fiber and receiving optical fiber between can be N-core.

The internal connection end of the multiplexer/demultiplexer is used for a pluggable connection with the optical port of the CPO switch, that is, the multiplexer/demultiplexer can be "plugged" into the externally connected optical port of the CPO switch; at the same time, the external connection of the multiplexer/demultiplexer The end can be pluggably connected with the optical fiber connector, so that the optical fiber connector can be directly "plugged" on the multiplexer/demultiplexer device; thus, when the multiplexer/demultiplexer device is connected to the CPO switch, the optical fiber connector is equivalent to "plugged in" on the CPO switch.

Thus, the optical signal modulated by the photoelectric sealing module in the CPO switch is transmitted to the optical port of the CPO switch through the pigtail, and enters the multiplexer unit of the multiplexer/demultiplexer through the external connection end and the sending fiber for M:N Multiplexing, and then from the sending fiber to the external connection end, and output the Tx optical service signal to the external optical fiber connector. The Rx optical service signal from the outside enters the demultiplexing unit through the optical fiber connector, external connection end, and receiving optical fiber for N:M demultiplexing, and then enters the CPO switch through the receiving optical fiber, internal connecting end, and optical port for further processing.

In the embodiment of the present disclosure, one end of the multiplexer/demultiplexer device is pluggably connected to an optical port of a photoelectric package (CPO) switch (such as an optical connector on a panel of a CPO switch), while the other end can be connected to an external Pluggable connection of optical fiber connectors, thus the following effects can be obtained:

(1) The multiplexer/demultiplexer function is realized by a pluggable multiplexer/demultiplexer device. The photoelectric combination module of the CPO switch does not need to integrate the multiplexer/demultiplexer function, so its technical difficulty is low, easy to implement, and the volume and size are small, and there is no tail Fiber side suspension, good stability and shock resistance.

(2) The multiplexer/demultiplexer device is an independent device, so a technically mature multiplexer/demultiplexer (such as a multiplexer array, a wave splitter array) can be used, which is simple in design and low in cost.

(3) When the multiplexer/demultiplexer fails, or different multiplexer/demultiplexer requirements (such as WWDM, DWDM, LWDM) arise, the multiplexer/demultiplexer can be easily and flexibly replaced at any time.

(4) The external optical port structure on the CPO switch can be kept unchanged, and the external optical port structure of the CPO switch and the multiplexing/demultiplexing device (CPO switch system) can also be unchanged, so that it is not necessary to change the structure of the CPO switch and the corresponding optical fiber connector And the way of use, such as it can still be directly connected to the Breakout (exit) cable.

(5) The optical transmission application code has nothing to do with the photoelectric sealing module. For example, for PSM applications with 100m and 500m optical transmission requirements (corresponding to 400G-DR4, 800G-DR4 and other codes), the multiplexing and demultiplexing device of the embodiment of the present disclosure may not be used , and directly connect the external optical fiber connector to the CPO switch; and for CWDM applications (corresponding to 400G-FR4, 800G-FR4 and other codes) that require 2km-level optical transmission, the multiplexing and demultiplexing device of the embodiment of the present disclosure can be used insert.

In some embodiments, the multiplexing unit is a passive multiplexing unit; the demultiplexing unit is a passive demultiplexing unit.

As a method of the embodiment of the present disclosure, both the multiplexing unit and the demultiplexing unit can use “passive” devices, such as Z-Block multiplexer/demultiplexer arrays, so that they do not require power supplies, electrical connectors, etc. Pins do not require a heat dissipation structure, the structure is simple, and the technology is mature, the design is simple, and the cost is low.

Therefore, the multiplexer/demultiplexer device in the embodiment of the present disclosure is "passive", can realize the multiplexer/demultiplexer function, and can be "pluggable", so it is equivalent to a "pluggable passive optical module (PPOM, Plugable Passive Optical Module)".

In some embodiments, the multiplexing unit and the demultiplexing unit are co-packaged into an integrated structure.

As a manner of the embodiment of the present disclosure, referring to FIG. 10 , the multiplexing unit and the demultiplexing unit may be “co-packaged” to simplify the structure.

In some embodiments, the inner connector includes a female mechanical transmission (MT) ferrule.

In some embodiments, the inner connection end includes an optical connector adapter interface with a female header.

As a manner of the embodiment of the present disclosure, referring to FIG. 5 , the internal connection end of the multiplexing and demultiplexing device may be a female MT ferrule.

As another mode of the embodiment of the present disclosure, referring to FIG. 5 , the internal connection end of the multiplexer/demultiplexer device may also be an optical connector adapter interface with a female head.

In some related technologies, the original optical port on the panel of the CPO switch can be a male optical connector or a male MT ferrule, and in order to "plug" with the original optical port of the CPO switch, the multiplexer/demultiplexer device The inner connection end can be a corresponding optical connector adapter interface with a female head (equal to "female optical connector + adapter"), or a female MT ferrule (there is an adapter in the CPO switch).

In some embodiments, the external connection end includes an optical connector adapter with a male header or a male mechanical transmission ferrule.

Referring to FIG. 5 , as a method of the embodiment of the present disclosure, the external connection end of the multiplexer/demultiplexer device may be an optical connector adapter interface with a male head, or an MT ferrule with a male head.

As before, the original optical port on the panel of the CPO switch may be a male optical connector, which is connected to a female optical connector (optical fiber connector) through an adapter. In order to make the external optical fiber connector connect to the external connection end of the multiplexing and demultiplexing device like the optical port of the CPO switch without changing the structure, the external connection end can be an optical connector adapter interface with a male head or Male MT ferrule.

It should be understood that the specific number of interfaces/joints included in the above inner connection end and outer connection end is not limited, that is, each inner connection end or outer connection end may only include one corresponding interface/joint, or may include multiple interfaces/joints. Connectors, while multiple interfaces/connectors can form an "array" at this time.

In some embodiments, the wavelength multiplexing and demultiplexing device of the embodiments of the present disclosure further includes: a housing, at least the multiplexing unit and the wavelength demultiplexing unit are arranged in the housing.

Referring to FIG. 5 , in one form of the embodiment of the present disclosure, in order to protect the wave combining unit and the wave splitting unit, etc., they can be enclosed in a housing (materials such as metal and plastic can be used).

Of course, referring to FIG. 5 , other components (such as transmitting optical fiber, receiving optical fiber, etc.) in the multiplexer/demultiplexer device can also be enclosed by the housing, but at least the inner connection end and the outer connection end need to be exposed to realize the connection.

In some embodiments, the multiplexer/demultiplexer device further includes: a limiting structure for limiting the relative position of the multiplexer/demultiplexer device and the connected photoelectric package switch.

As a method of the embodiment of the present disclosure, the multiplexer/demultiplexer device may also include a limiting structure, which is used to limit the insertion depth of the multiplexer/demultiplexer device when it is inserted into the CPO switch and play a fixed role (that is, relative to the CPO location of the switch). There are various specific forms of the limiting structure, for example, it can be a protrusion provided on the housing with reference to FIG. 6 , and of course it can also be other forms such as a snap spring, a guide rail, and a slot.

In some embodiments, the multiplexer/demultiplexer device of the embodiment of the present disclosure further includes: an operating structure, which is used for an operator to grasp to insert and remove the multiplexer/demultiplexer device.

As a manner of the embodiments of the present disclosure, the multiplexer/demultiplexer device may further include an operating structure, so that an operator can move the multiplexer/demultiplexer device through the operating structure to insert and/or remove the multiplexer/demultiplexer device. There are various specific forms of the operating structure, for example, it can be a pull ring referring to FIG. 6 , and of course it can also be other forms such as a handle.

In the second aspect, an embodiment of the present disclosure provides a photoelectric package switch system, which includes: a photoelectric package switch; and at least one multiplexer/demultiplexer device, the multiplexer/demultiplexer device is any one of the above-mentioned embodiments of the present disclosure The wave device, the inner connection end of which is plugged into the optical port of the photoelectric sealing switch.

As a method of the embodiment of the present disclosure, the above multiplexer/demultiplexer device can also be installed on the CPO switch to form an "optical switch system" that can be directly connected to an optical fiber connector.

It should be understood that the multiplexer/demultiplexer device in the photoelectric package switch system can be disassembled and replaced.

In some embodiments, the multiplexer/demultiplexer device is located at the edge of the optoelectronic package switch, and its external connection end faces the outside of the optoelectronic package switch.

As a method of the embodiment of the present disclosure, the multiplexer/demultiplexer device can be installed on the edge of the CPO switch (such as on the panel), and its external connection end faces the outside of the CPO switch (such as the outside of the panel), so that the external optical fiber connector can be directly connected to the Outer connection end connection.

It should be understood that the specific positional relationship of the multiplexer/demultiplexer device relative to the CPO switch (such as its box) is various. For example, the multiplexer/demultiplexer device can be completely located "outside" the box of the CPO switch; or, the multiplexer/demultiplexer device can also be partly or completely "sinked" into the box, within the projection range of the box body.

For another example, the pigtail optical connector in the CPO switch can be fixed in its box, so that the inner connection end of the multiplexer/demultiplexer device needs to be inserted into the box for connection; or, the pigtail optical connector can also protrude from the box. In vitro, it is directly connected to the internal connection end of the multiplexer/demultiplexer device; or, the pigtail optical connector can also be "movable", which is also "brought out" of the box when the multiplexer/demultiplexer device is unplugged In addition, for the next insertion operation, and in the next insertion operation, the pigtail optical connector will be "pushed" into the box body to save space.

Example 1

This example provides a photoelectric package switch system, which uses a 51.2T CPO switch, including 16 3.2T (8×400G-FR4) photoelectric package modules (single bank solution, 1 pair of RX/TX cable output) , and each photoelectric sealing module is equipped with one multiplexer/demultiplexer device according to the embodiment of the present disclosure, that is, there are 16 multiplexer/demultiplexer devices in total.

6 to 10, in this example, the optical transmission signal modulated by the photoelectric sealing module inside the CPO switch passes through the female MT ferrule array 101 (inner connection end) and the 32-core transmission optical fiber 102 inside the multiplexing and demultiplexing device. (Transmitting optical fiber) is connected to 4:1 CWDM multiplexer/demultiplexer 8 array 103 (multiplexing unit) for optical multiplexing, and the combined 8-way optical signal is connected to the 8-core transmitting optical fiber 104 (transmitting optical fiber) to the The MPO optical connector adapter 105 (external connection end) of the MPO optical connector adapter 105 (external connection end) carries out the Tx optical service signal output; Similarly, the Rx optical service signal introduced by the MPO optical connector adapter 105 containing the male head is connected through the 8-core receiving optical fiber 106 (receiving optical fiber) To the 1:4 CWDM demultiplexer 8 array 107 (demultiplexing unit) for optical demultiplexing, the 32 optical signals after demultiplexing are connected to the female MT ferrule array 101 through the 32-core receiving optical fiber 108 (receiving optical fiber), Input to the photoelectric sealing module inside the CPO switch.

The MT ferrule array can be implemented with a single high-capacity MT ferrule, and can also be implemented in parallel with two low-capacity MT ferrules.

The multiplexer/demultiplexer device may also include a metal casing 29 . The multiplexer/demultiplexer device can also include a protrusion 211 (limiting structure), which limits its insertion depth and plays a fixed role, and can cooperate with the pull ring 22 (operational structure) to make it flexible to insert and pull out.

The positioning of the multiplexer/demultiplexer device can also be realized through the cooperation of guide rails or cages, and its specific mechanical structure will not be repeated in this example.

The overall shape and size of the multiplexer/demultiplexer device (including the housing 29 , the protrusion 211 , and the pull ring 22 ) can be designed with reference to existing pluggable optical modules.

The panel structure of the CPO switch can be the same as the traditional technology, and can be equipped with MPO/MTP female jumpers; among them, the adapter connected to the inner side of the multiplexing and demultiplexing device (the adapter in the CPO switch) needs to be fixed with a distribution frame, because the adapter The height is greater than the thickness of the CPO switch box, so the adapter inside the CPO switch and the pigtail optical connector of the photoelectric sealing module will not be taken out with the pulling out of the multiplexer/demultiplexer device.

The parameters of the photoelectric package switch system in this example:

Service type: 3.2T (8×400G-FR4);

The structure of photoelectric sealing module: single Bank (interval scheme);

External connection structure of multiplexer/demultiplexer: MPO/MTP optical connector adapter;

Inner connection structure of multiplexer/demultiplexer: 1 MT ferrule;

The shape of the multiplexing and demultiplexing device: imitating a pluggable optical module;

Shell material of multiplexer/demultiplexer: metal.

Example 2:

This example provides a photoelectric package switch system, which uses a 51.2T CPO switch, which includes 16 3.2T (4×800G-FR4) photoelectric package modules (single Bank solution, 1 pair of RX/TX cable output), Multiplexer/demultiplexer devices corresponding to 16 embodiments of the present disclosure.

11 to 14, in this example, the optical transmission signal modulated by the photoelectric sealing module inside the CPO switch passes through the MPO/MTP optical connector adapter 1011 (internal connection end), 16-core sending fiber (sending fiber) is connected to 4:1 CWDM multiplexer/demultiplexer 4 arrays (combining unit) for optical multiplexing, and the combined 4 optical signals pass through 4-core sending fiber (sending fiber) Connect to the MPO optical connector adapter 105 containing the male head or the male MT ferrule array (external connection end) to carry out the Tx optical service signal output; similarly, the Rx optical service signal passes through the MPO optical connector adapter 105 containing the male head or The male MT ferrule array introduces the multiplexer and demultiplexer, and then connects to the 1:4 CWDM demultiplexer 4 array (demultiplexer unit) through the 4-core receiving fiber (receiving fiber) for optical demultiplexing. After demultiplexing, the 16 channels The optical signal is connected to the MPO/MTP optical connector adapter 1011 containing the female MT ferrule through the 16-core receiving optical fiber (receiving optical fiber), and is input to the photoelectric sealing module inside the CPO switch.

The multiplexer/demultiplexer device can also include a plastic shell 29 to further reduce its weight (because it is a passive device, there is no heat dissipation structure, so a plastic shell can be used).

The multiplexer/demultiplexer device can also include a snap spring 212 and another form of protrusion 211 (limiting structure) to limit its insertion depth and play a fixed role, and can cooperate with another form of pull ring 22 (operating structure) to make Its insertion and extraction are flexible.

The overall shape and size of the multiplexer/demultiplexer device (including the housing 29, the retaining spring 212, the protrusion 211, and the pull ring 22) can be designed with reference to existing pluggable optical modules.

The panel structure of the CPO switch can be the same as the traditional technology, and both can be matched with MPO/MTP female jumpers.

Since the multiplexer/demultiplexer in this example directly has an optical connector adapter inside, it can be directly connected to a CPO switch without additional fixing by a distribution frame.

Since the thickness of the pigtail optical connector of the photoelectric sealing module in the CPO switch in this example is smaller than the thickness of the box body, the pigtail optical connector can be taken out with the pulling out of the multiplexer/demultiplexer device, and can be carried out outside the box. operate.

Since the multiplexer/demultiplexer in this example adopts a plastic shell and is light in weight, there is no need to set guide rails, and it can be directly fastened on the panel of the CPO switch.

The parameters of the photoelectric package switch system in this example:

Service type: 3.2T (4×800G-FR4);

The structure of photoelectric sealing module: single Bank (interval scheme);

External connection structure of multiplexer/demultiplexer: MPO/MTP optical connector adapter

Inner connection structure of multiplexer/demultiplexer: 1 MT ferrule;

Shell material of multiplexer/demultiplexer: plastic.

Example 3:

Referring to Figure 15 and Figure 16, this example provides a photoelectric package switch system, in which a 51.2T CPO switch is used, which includes a 3.2T (4×800G-FR4) photoelectric package module (dual Bank solution, 2 pairs of RX/TX cable output), the panel can be pluggably connected to one or more multiplexer/demultiplexer devices according to the embodiments of the present disclosure.

In this example, the multiplexer/demultiplexer device is similar to the multiplexer/demultiplexer device in Example 1, the difference is that, referring to Fig. 16 , two female MT ferrule arrays 101 (inner connection end), which specifically applies to the following situations:

(1) The capacity of a single MT ferrule is not enough, so two (of course, more) MT ferrules can be used;

(2) The photoelectric sealing module is output by 2 pairs of RX/TX and matching optical connectors, exactly corresponding to the 2 optical ports of the multiplexing and demultiplexing device.

In this example, the optical port on the inner side of the panel is recessed in the PPOM, which is better mechanically protected. It is also a form of implementation.

The parameters of the photoelectric package switch system in this example:

Service type: 3.2T (8×400G-FR4);

The structure of photoelectric sealing module: double Bank;

Inner connection structure of multiplexer/demultiplexer: 2 MT ferrules;

Shell material of multiplexer/demultiplexer: metal.

This disclosure has disclosed example embodiments and, although specific terms have been employed, they are used and should be construed in a generic descriptive sense only and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that features, characteristics and/or elements described in connection with a particular embodiment may be used alone, or may be described in combination with other embodiments, unless explicitly stated otherwise. Combinations of features and/or elements. Accordingly, it will be understood by those of ordinary skill in the art that various changes in form and details may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

A multiplexing and demultiplexing device, which includes: a multiplexing unit, a demultiplexing unit, an internal connection terminal and an external connection terminal, wherein,

Both ends of the multiplexing unit are respectively connected to the inner connection end and the outer connection end through sending optical fibers;

Both ends of the demultiplexing unit are respectively connected to the inner connection end and the outer connection end through receiving optical fibers;

The inner connection end is used for pluggable connection to the optical port of the photoelectric package switch; and

The outer connection end is used for pluggable connection to the optical fiber connector.
The wave multiplexing and demultiplexing device according to claim 1, wherein,

The multiplexing unit is a passive multiplexing unit;

The demultiplexing unit is a passive demultiplexing unit.
The wave multiplexing and demultiplexing device according to claim 1, wherein,

The internal connection end includes a female mechanical transmission ferrule.
The wave multiplexing and demultiplexing device according to claim 1, wherein,

The inner connection end includes an optical connector adapter with a female connector.
The wave multiplexing and demultiplexing device according to claim 1, wherein,

The external connection end includes an optical connector adapter with a male head or a mechanical transmission ferrule with a male head.
The multiplexing and demultiplexing device according to claim 1, further comprising:

The limit structure is used to limit the relative position of the multiplexer/demultiplexer and the connected photoelectric package switch.
The multiplexing and demultiplexing device according to claim 1, further comprising:

The operating structure is used for the operator to grasp and insert and remove the multiplexer/demultiplexer.
The wave multiplexing and demultiplexing device according to claim 1, wherein,

The multiplexing unit and the demultiplexing unit are co-packaged into an integrated structure.
The multiplexing and demultiplexing device according to claim 1, further comprising:

The casing, at least the wave combining unit and the wave splitting unit are arranged in the casing.
A photoelectric package switch system, comprising:

Photoelectric package switch;

At least one multiplexer/demultiplexer device, the multiplexer/demultiplexer device is the multiplexer/demultiplexer device according to any one of claims 1 to 9, the inner connection end of which is plugged and connected to the optical port of the photoelectric package switch.
The photoelectric sealing switch system according to claim 10, wherein,

The multiplexer/demultiplexer device is located at the edge of the photoelectric package switch, and the external connection end of the multiplexer/demultiplexer device faces the outside of the photoelectric package switcher.