Optical module, single board and optical network terminal

Abstract

The embodiment of the invention provides an optical module, a single board and an optical network terminal, and relates to the field of optical network equipment. The integration level of the optical module is improved. According to the specific scheme, the optical module comprises a shell, a first optical connector, an optical transceiving assembly, a second optical connector and a light splitting element. The first optical connector and the second optical connector are connected with the shell; the optical transceiver assembly is located in the shell; the light splitting element is located in the shell, and the first optical connector, the optical transceiver assembly and the second optical connector are all connected with the light splitting element. The light splitting element is used for combining the light beam from the first optical connector and the light beam of the light transceiving assembly and then transmitting the combined light beam to the second optical connector, or the light splitting element is used for splitting the light beam from the second optical connector and then transmitting the split light beam to the first optical connector and the light transceiving assembly. The integration level of the optical module is increased, and the integration level of the single board including the optical module is also correspondingly increased, so that the occupied volume of the whole optical network can be reduced. The optical network terminal provided by the embodiment of the invention can not comprise an optical service unit.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical network equipment, and specifically to an optical module, a single board, and an optical network terminal. Background Art

[0002] With the development of modern society, especially the advent of the big data era, optical transmission, with its unique ultra-high bandwidth and low electromagnetic interference characteristics, has gradually become the mainstream solution for modern communications. In particular, new networks, especially access networks represented by fiber-to-the-home (FTTH), are being deployed on a large scale.

[0003] Optical communication networks used in access network scenarios primarily take the form of passive optical networks (PONs). With the widespread adoption of optical networks, the deployment of a large number of PON networks requires an equally large number of communication devices. Related communication equipment, such as optical line terminals (OLTs), primarily consists of optical modules, the boards they house, and the chassis they support. The structural performance of each communication device directly impacts the performance of the entire optical network. For example, the integration level of optical modules directly affects the size of the optical network. Therefore, increasing the integration level of optical modules is a pressing technical challenge. Summary of the Invention

[0004] The embodiments of the present application provide an optical module, a board, and an optical network terminal, aiming to improve the integration of the optical module.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides an optical module. The optical module includes a housing, a first optical connector, an optical transceiver assembly, a second optical connector, and a spectrometer. The first optical connector is connected to the housing; the optical transceiver assembly is located inside the housing; the second optical connector is connected to the housing; the spectrometer is located inside the housing, and the first optical connector, the optical transceiver assembly, and the second optical connector are all connected to the spectrometer. The spectrometer is used to combine the light beam from the first optical connector and the light beam from the optical transceiver assembly and transmit them to the second optical connector; or, the spectrometer is used to split the light beam from the second optical connector and transmit them to the first optical connector and the optical transceiver assembly respectively. Thus, the light beam emitted from the first optical connector and the light beam emitted from the optical transceiver assembly can be emitted from the second optical connector, so that the light beam emitted from the second optical connector includes the signal emitted by the optical transceiver assembly and the signal emitted by the first optical connector. Similarly, the light beam from the first optical connector and the light beam from the optical transceiver assembly can both come from the second optical connector. This increases the integration of the optical module. The integration of the optical module is increased, and the integration of the board including the optical module is also increased accordingly, which can reduce the volume occupied by the entire optical network.

[0007] In conjunction with the first aspect, in some achievable embodiments, the optical module further includes an electrical connector. The electrical connector is connected to the housing, is electrically connected to the optical transceiver assembly, and is disposed on the same side of the housing as the first optical connector. Thus, the electrical connector is used to power the optical transceiver assembly, and the electrical connector and the first optical connector, located on the same side of the housing, can be plugged in and out together.

[0008] In conjunction with the first aspect, in some achievable embodiments, the optical module further comprises: a first optical waveguide, a second optical waveguide, and a third optical waveguide. The first optical connector is connected to the optical splitter via the first optical waveguide; the optical transceiver assembly is connected to the optical splitter via the second optical waveguide; and the second optical connector is connected to the optical splitter via the third optical waveguide. Thus, the first optical connector transmits a light beam to the optical splitter via the first optical waveguide, and the optical transceiver assembly transmits a light beam to the optical splitter via the second optical waveguide. The second optical connector transmits a light beam to the optical splitter via the third optical waveguide.

[0009] In conjunction with the first aspect, in some achievable embodiments, the optical module further includes a heat dissipation layer located within the housing, and the optical transceiver assembly is connected to the heat dissipation layer. Thus, the heat dissipation layer can dissipate heat from the optical transceiver assembly, thereby improving the heat dissipation performance of the optical module.

[0010] In a second aspect, embodiments of the present application provide a single board. The single board includes: a board body, an optical connector, and a plurality of optical modules of any one of the types provided in the first aspect. The plurality of optical modules are connected to the board body; and the first optical connectors of the plurality of optical modules are connected to the optical connector.

[0011] In conjunction with the second aspect, in some achievable embodiments, the board further includes: a first optical switch. The first optical switch is connected to the board; the optical connector is connected to the first optical switch; the first optical switch has multiple first optical interfaces, each of which is connected to the first optical connector of the optical module. Thus, the first optical switch is used to physically switch or logically operate on the signal output by the optical connector. A single first optical switch can transmit signals for multiple first optical connectors. This improves the integration of the board, reduces the number of components on the board, and reduces the board's size.

[0012] In conjunction with the second aspect, in some feasible embodiments, the single board further includes: a plurality of second optical switches. The plurality of second optical switches are all connected to the board body, and the plurality of second optical switches are all connected to the optical connector; the second optical switch has at least one second optical interface, and one of the second optical interfaces is connected to the first optical connector of the optical module. Thus, the plurality of second optical switches can physically switch and transmit the signal of the optical time domain reflectometer to the first optical connector. A second optical switch is connected to at least one first optical connector. If a second optical interface fails, only the second optical switch that fails can be replaced or repaired, without replacing all the second optical switches. The cost and difficulty of replacement and repair are low.

[0013] In conjunction with the second aspect, in some achievable embodiments, the optical connector includes a first end and a second end, the first end being connected to the first optical connector. The second end and the second optical connector are both oriented toward the same side of the board; alternatively, the second end and the first optical connector are oriented toward opposite sides of the board. In this manner, a user can assemble a device connected to the second end and a device connected to the second optical connector on the same side. Alternatively, a user can assemble a device connected to the second end and a device connected to the second optical connector from opposite sides.

[0014] In conjunction with the second aspect, in some achievable embodiments, the single board further includes a printed circuit board, the printed circuit board being connected to the board body, the optical module being connected to the printed circuit board, and being capable of providing electrical signals to the optical module.

[0015] In a third aspect, an embodiment of the present application provides an optical network terminal. The optical network terminal includes: the single board provided in the second aspect above and an optical time domain reflectometer. The optical time domain reflectometer is connected to the first optical connector. Thus, the signal of the optical time domain reflectometer is transmitted to the optical module through the optical connector, and the optical module combines the signal of the optical time domain reflectometer and the signal of the single board and outputs the combined signal. The light beam output by the optical module contains the signal information of the optical time domain reflectometer, and the fault information of the optical network can be identified through this signal information. There is no need to combine the light beam output by the optical module and the signal of the optical time domain reflectometer through devices such as a combiner, thereby increasing the integration of the optical network terminal and reducing the size of the optical network terminal.

[0016] In conjunction with the third aspect, in some achievable embodiments, the optical network terminal further comprises a fiber optic distribution frame. The second optical connectors of the plurality of optical modules are all connected to the fiber optic distribution frame. Signal lines output by the optical modules can be directly transmitted to the fiber optic distribution frame via optical waveguides, eliminating the need for components such as combiners between the optical modules and the fiber optic distribution frame. This increases the integration of the optical network terminal, reduces its size, and simplifies its assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1The figure is a structural diagram of an optical network terminal.

[0018] Figure 2 It is a structural diagram of an optical line optical distribution network known to the applicant.

[0019] Figure 3 The figure is a structural diagram of an optical network terminal.

[0020] Figure 4 A schematic structural diagram of the optical time domain reflectometer and single board provided in an embodiment of the present application.

[0021] Figure 5 A schematic diagram of the internal structure of an optical module provided in an embodiment of the present application.

[0022] Figure 6 A schematic structural diagram of an electrical connector and a first optical connector provided in an embodiment of the present application.

[0023] Figure 7 A schematic diagram of the internal structure of the housing provided in an embodiment of the present application.

[0024] Figure 8a A schematic structural diagram of an optical transceiver assembly provided in an embodiment of the present application.

[0025] Figure 8b A schematic structural diagram of another optical transceiver assembly provided in an embodiment of the present application.

[0026] Figure 9 Another structural schematic diagram of the optical time domain reflectometer and single board provided in an embodiment of the present application.

[0027] Figure 10 A schematic diagram of the structure of another single board provided in an embodiment of the present application.

[0028] Figure 11 A schematic structural diagram of another single board provided in an embodiment of the present application.

[0029] In the figure: 001-first optical fiber; 002-second optical fiber; 003-third optical fiber; 20-optical network terminal; 210-chassis; 220-optical time domain reflectometer; 100-single board; 110-board; 120-optical module; 130-optical connector; 121-first optical connector; 122-second optical connector; 123-housing; 124-optical transceiver assembly; 125-spectroscopy element; 126-electrical connector; 140-photoelectric connector; 126-electrical connector; 127-heat dissipation layer; 150-printed circuit board; 101-first optical waveguide; 102-second optical connector Two optical waveguides; 103-third optical waveguide; 104-fourth optical waveguide; 105-fifth optical waveguide; 106-sixth optical waveguide; 107-seventh optical waveguide; 131-first end; 132-second end; 021-first light source; 022-second light source; 203-third light source; 204-first detector; 205-second detector; 206-third detector; 207-lens assembly; 208-lens assembly; 201-first optical switch; 2011-first optical interface; 202-second optical switch; 2021-second optical interface; 160-wrench. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0031] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0032] In addition, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0033] Passive Optical Network (PON): A passive optical network is an optical distribution network (ODN) between the OLT and the ONU, without any active electronic devices.

[0034] Optical distribution network (ODN): An ODN is a fiber-to-the-home (FTTH) cable network based on PON equipment. Its function is to provide an optical transmission channel between the OLT and the ONU.

[0035] Wavelength division multiplexing (WDM): Wavelength division multiplexing is a technology that combines two or more optical carrier signals (carrying various information) of different wavelengths at the transmitting end through a multiplexer (also called a combiner) and couples them into the same optical fiber for transmission. At the receiving end, a demultiplexer (also called a wavelength splitter or demultiplexer) separates the optical carriers of different wavelengths, and then an optical receiver further processes them to restore the original signal. This technology of simultaneously transmitting two or more optical signals of different wavelengths in the same optical fiber is called wavelength division multiplexing.

[0036] Optical transmission module: Also known as an optical module, it consists of two main parts: a bi-directional optical sub-assembly (BOSA) and an electrical subassembly (ESA). The optical transmission module is completed by electrically connecting the pins of the BOSA to the peripheral electronic subassembly (ESA) and then installing it into the optical module housing.

[0037] Bi-directional optical sub-assembly (BOSA): mainly includes the transmitting optical sub-assembly (TOSA) and the receiving optical sub-assembly (ROSA).

[0038] Transmitting Optical Sub-Assembly (TOSA): The function of TOSA is to convert electrical signals into optical signals and input them into optical fibers for transmission.

[0039] Receiving Optical Sub-Assembly (ROSA): The function of ROSA is to receive the optical signal transmitted by the optical fiber and convert it into an electrical signal.

[0040] Figure 1 This is a schematic diagram of the structure of an optical network terminal. Figure 1The optical network terminal includes an optical line terminal (OLT), an optical distribution frame (ODF), and an optical network unit (ONU). In some embodiments, the optical network unit (ONU) can also be an optical network terminal (ONT).

[0041] The optical network terminal (OLT) transmits network signals through multiple optical fibers via an optical distribution frame (ODF) to an optical network unit (ONU) or optical network terminal (ONT). If a fiber fails during this process, it must be identified and repaired.

[0042] Figure 1 In the OLT, the optical network terminal (OLT) includes an optical time domain reflectometer (OTDR) and a passive optical network (PON) board. The OTDR output signal is combined with the PON output signal. By identifying the OTDR output signal, the fault location information in the OLT can be identified.

[0043] In some embodiments, the optical time domain reflectometer (OTDR) may be an optical artificial intelligence (OAI).

[0044] Figure 2 This is a structural diagram of an optical line optical distribution network (ODN) of the applicant's known technology. Among them, the optical distribution network includes an optical network terminal OLT, an optical fiber distribution frame ODF, an optical network terminal ONT and an optical service unit (OSU). The OAI in the optical network terminal OLT is connected to the optical service unit OSU through the first optical fiber 001, the PON board in the optical network terminal OLT is connected to the optical service unit OSU through the second optical fiber 002, and the optical service unit OSU is connected to the optical fiber distribution frame ODF through the third optical fiber 003. The optical service unit OSU includes multiple optical switches and multiple combiners and splitters. The signal output by the OAI is respectively transmitted to multiple combiners and splitters through the multiple optical switches in the OSU. The combiner and splitter combine the signals from the OAI and the PON and then transmits them to the optical fiber distribution frame ODF, so that the optical signal including the OAI signal and the PON signal is transmitted in the optical line optical distribution network.

[0045] Figure 2In the optical fiber, the first optical fiber 001, the second optical fiber 002 and the third optical fiber 003 are all connected to the optical service unit OSU. There are many optical fibers, the integration of the optical line optical distribution network is low, the space occupied is large, and the assembly process is complicated and time-consuming.

[0046] The optical network provided by the embodiments of the present application can improve its integration and reduce the volume of the optical network.

[0047] Figure 3 FIG2 is a schematic diagram of the structure of an optical network terminal 20. Figure 3 The optical network terminal 20 includes a chassis 210, an optical time domain reflectometer 220, and a board 100. The optical time domain reflectometer 220 and the board 100 are both connected to the chassis 210. In some embodiments, the optical time domain reflectometer 220 and the chassis 210 are detachably connected, for example, by snapping the optical time domain reflectometer 220 and the chassis 210 together. The board 100 and the chassis 210 are detachably connected, for example, by snapping the board 100 and the chassis 210 together.

[0048] The embodiment of the present application does not limit the number of optical time domain reflectometers 220 in the optical network terminal 20. The number of optical time domain reflectometers 220 can be one, two, three, or more. The embodiment of the present application also does not limit the number of single boards 100. The number of single boards 100 can be one, two, three, or more.

[0049] The optical network terminal 20 provided in the embodiment of the present application may not include an optical service unit OSU, and the complexity of the optical network terminal 20 is reduced.

[0050] Figure 4 This is a structural diagram of the optical time domain reflectometer 220 and the single board 100 provided in the embodiment of the present application. Figure 4 The single board 100 includes a board body 110, an optical module 120, and an optical connector 130. The optical module 120 and the optical connector 130 are both connected to the board body 110. There are multiple optical modules 120. Multiple optical modules 120 are all connected to the board body 110. The optical connector 130 is connected to the optical time domain reflectometer 220. The signal from the optical time domain reflectometer 220 is transmitted to the optical module 120 via the optical connector 130. The optical module 120 combines the signal from the optical time domain reflectometer 220 and the signal from the single board 100 and outputs the combined signal. The light beam output by the optical module 120 contains signal information from the optical time domain reflectometer 220, and this signal information can be used to identify fault information in the optical network. There is no need to combine the light beam output by the optical module 120 and the signal from the optical time domain reflectometer 220 using a combiner or other device, thereby increasing the integration of the optical network terminal and reducing the size of the optical network terminal.

[0051] Figure 4In the example, multiple optical modules 120 are arranged side by side. The embodiment of the present application does not limit the connection method between the optical module 120 and the board 110. For example, the optical module 120 and the board 110 can be connected by clamping or welding.

[0052] In some embodiments of the present application, the board 100 may further include a printed circuit board (PCB) 150. The PCB 150 is connected to the board body 110. The optical module 120 is electrically connected to the PCB 150. The PCB 150 may provide electrical signals to the optical module 120. For example, the electrical connector of the optical module 120 is detachably connected to the PCB 150. When the electrical connector is connected to the PCB 150, the PCB 150 provides electrical signals to the optical module 120.

[0053] Figure 5 This is a schematic diagram of the internal structure of an optical module 120 provided in an embodiment of the present application. Figure 5 The optical module 120 includes a housing 123, a first optical connector 121, a second optical connector 122, a bi-directional optical sub-assembly (BOSA) 124, and a beam splitter 125. The bi-directional optical sub-assembly 124 and the beam splitter 125 are both located within the housing 123. The first optical connector 121 and the second optical connector 122 are both connected to the housing 123.

[0054] The first optical connector 121, the second optical connector 122, and the optical transceiver assembly 124 are all connected to a beam splitter 125. The beam splitter 125 is used to combine the light beam from the first optical connector 121 and the light beam from the optical transceiver assembly 124, and transmit the combined light beam to the second optical connector 122. Alternatively, the beam splitter 125 is used to split the light beam from the second optical connector 122, and transmit the combined light beam to the first optical connector 121 and the optical transceiver assembly 124, respectively.

[0055] In some embodiments of the present application, the optical splitter element 125 is a wavelength division multiplexer. In some embodiments, the optical splitter element 125 is an optical splitter.

[0056] As a result, the light beam emitted from the first optical connector 121 and the light beam emitted from the optical transceiver assembly 124 can be emitted from the second optical connector 122, so that the light beam emitted from the second optical connector 122 includes the signal emitted by the optical transceiver assembly 124 and the signal emitted by the first optical connector 121. Similarly, the light beam from the first optical connector 121 and the light beam from the optical transceiver assembly 124 can both originate from the second optical connector 122. This increases the integration of the optical module 120. As the integration of the optical module 120 increases, the integration of the board 100 including the optical module 120 also increases, thereby reducing the volume occupied by the entire optical network.

[0057] The present embodiment does not limit the shape of the housing 123. For example, the housing 123 may be prismatic, cylindrical, or irregular in shape. The housing 123 may be configured according to the shape of the optical module 120. In some embodiments, the optical module 120 is an elongated strip structure, with the first optical connector 121 and the second optical connector 122 located at opposite ends of the optical module 120.

[0058] The embodiment of the present application does not limit the types of the first optical connector 121 and the second optical connector 122 . For example, the first optical connector 121 and the second optical connector 122 may both be optical connectors.

[0059] In some embodiments of the present application, the optical module 120 further includes an electrical connector 126, which is connected to the housing 123. The electrical connector 126 is electrically connected to the optical transceiver assembly 124, and the electrical connector 126 is used to supply power to the optical transceiver assembly 124. The electrical connector 126 and the first optical connector 121 are arranged on the same side of the housing 123. The electrical connector 126 and the first optical connector 121 can be plugged in and out together. For example, during the process of plugging in and out of the optical module 120, the electrical connector 126 and the first optical connector 121 can be connected to the board 110 together, or the electrical connector 126 and the first optical connector 121 can be separated from the board 110 together.

[0060] In some embodiments, the electrical connector 126 and the first optical connector 121 together constitute the optoelectronic connector 140. In other words, the electrical connector 126 and the first optical connector 121 can be considered the optical connector and the electrical connector of the optoelectronic connector 140. The optoelectronic connector 140 is connected to the housing 123, and the optoelectronic connector 140 includes the electrical connector 126 and the first optical connector 121. It is understood that in some embodiments of the present application, the electrical connector 126 and the first optical connector 121 can be provided independently.

[0061] Figure 6 This is a schematic diagram of the structure of an electrical connector 126 and a first optical connector 121 provided in an embodiment of the present application. Figure 6 In some embodiments, the electrical connector 126 includes a gold finger. For example, the gold finger is connected to the printed circuit board 150 (eg Figure 4 As shown) detachably connected, in the embodiment of the present application, the number of gold fingers can be one, two, three or more. As mentioned above, the optical module 120 (as shown) Figure 4 ) with the printed circuit board 150, the optical module 120 and the board body 110 (as shown) Figure 4 During the connection process (as shown), the gold fingers of the electrical connector 126 are plugged into the printed circuit board 150, and the first optical connector 121 is connected to the board body 110.

[0062] Please return Figure 5In some embodiments, the optical module 120 may further include a first optical waveguide 101, a second optical waveguide 102, and a third optical waveguide 103. The first optical waveguide 101, the second optical waveguide 102, and the third optical waveguide 103 are all located within a housing 123. The first optical connector 121 is connected to the optical splitter 125 via the first optical waveguide 101. The optical transceiver assembly 124 is connected to the optical splitter 125 via the second optical waveguide 102. The second optical connector 122 is connected to the optical splitter 125 via the third optical waveguide 103. In this way, the first optical connector 121 transmits a light beam to the optical splitter 125 via the first optical waveguide 101, and the optical transceiver assembly 124 transmits a light beam to the optical splitter 125 via the second optical waveguide 102. The second optical connector 122 transmits a light beam to the optical splitter 125 via the third optical waveguide 103.

[0063] The embodiment of the present application does not limit the type of the first optical waveguide 101. For example, the first optical waveguide 101 can be an optical fiber, a planar waveguide, etc., and the same applies to the other optical waveguides.

[0064] Figure 5 In some embodiments of the present application, the first optical connector 121 is configured with the fourth optical waveguide 104, and the second optical connector 122 is configured with the fifth optical waveguide 105. In some embodiments of the present application, the first optical connector 121 and the fourth optical waveguide 104 are detachably connected, for example, the first optical connector 121 and the fourth optical waveguide 104 are detachably connected via an optical fiber connector. The optical fiber connector can be provided on the board 110 (e.g., Figure 4 When the optical module 120 is connected to the board 110, the electrical connector 126 of the optical module 120 is plugged into the printed circuit board 150, and the first optical connector 121 is plugged into the optical fiber connector provided on the board 110. When the optical module 120 is separated from the board 110, the electrical connector 126 of the optical module 120 is separated from the printed circuit board 150, and the first optical connector 121 is separated from the optical fiber connector provided on the board 110.

[0065] In some embodiments of the present application, the first optical connector 121 is fixedly connected to the fourth optical waveguide 104. Similarly, in some embodiments of the present application, the second optical connector 122 is detachably connected to the fifth optical waveguide 105. For example, the second optical connector 122 and the fifth optical waveguide 105 are detachably connected via an optical fiber connector. In some embodiments of the present application, the second optical connector 122 and the fifth optical waveguide 105 are fixedly connected.

[0066] Figure 7 This is a schematic diagram of the internal structure of the housing 123 provided in the embodiment of the present application. Figure 7In some embodiments, the optical module 120 may further include a heat dissipation layer 127 , which is located within the housing 123 and connected to the optical transceiver assembly 124 . The heat dissipation layer 127 can dissipate heat from the optical transceiver assembly 124 , thereby improving the heat dissipation performance of the optical module 120 .

[0067] The embodiment of the present application does not limit the material of the heat dissipation layer 127. For example, the material of the heat dissipation layer 127 can be thermally conductive gel, thermally conductive metal, etc. The embodiment of the present application does not limit this.

[0068] The present embodiment of the present application does not limit the packaging type of the optical transceiver assembly 124. In some embodiments, the optical transceiver assembly 124 is packaged in a box with a square housing. In some embodiments, the optical transceiver assembly 124 is packaged in a transistor outline (TO) package based on a coaxial base. In some embodiments, the optical transceiver assembly 124 is packaged in a chip-on-board (COB) package that is directly placed on a carrier board.

[0069] Figure 8a This is a structural diagram of an optical transceiver assembly 124 provided in an embodiment of the present application. Figure 8a , Figure 8a The packaging form of the optical transceiver assembly 124 in the embodiment can be regarded as a box (BOX) packaging of a square shell. Figure 8a The arrow in the figure indicates the direction of light beam propagation. Since the light path is reversible, the light beam can also travel along the same direction as the Figure 8a The arrows in the direction of propagation are opposite to each other.

[0070] Figure 8a , the optical transceiver assembly 124 includes a first light source 021, a second light source 022, a third light source 203, a first detector 204, a second detector 205, a third detector 206, and a lens assembly 207. The lens assembly 207 is used to shape the light emitted by the first light source 021, the second light source 022, and the third light source 203.

[0071] The first detector 204, the second detector 205, and the third detector 206 are used to detect light input to the optical transceiver assembly 124. For example, the light received by the second optical connector 122 passes through the beam splitter 125 and then enters the lens assembly 207 for splitting, and then propagates to the first detector 204, the second detector 205, and the third detector 206 for detection.

[0072] In the embodiment of the present application, the lens assembly 207 may include a lens, a total reflection mirror, a beam splitting mirror, and the like. Figure 8a In the example shown in FIG. 1 , the optical transceiver assembly 124 is a box-shaped structure. The lens assembly 207 is connected to the light splitting element 125 .

[0073] Figure 8a In an example, the light splitting element 125 may include a spatial light filter, or the light splitting element 125 may also include a waveguide filter.

[0074] This embodiment of the present application places restrictions on the wavelengths of light emitted by the first light source 021, the second light source 022, and the third light source 203. For example, the wavelength of light emitted by the first light source 021 is 1577 nm, the wavelength of light emitted by the second light source 022 is 1342 nm, and the wavelength of light emitted by the third light source 203 is 1490 nm. This embodiment of the present application also places no restrictions on the wavelengths of light received by the first detector 204, the second detector 205, and the third detector 206. For example, the wavelength of light received by the first detector 204 is 1286 nm, the wavelength of light received by the second detector 205 is 1270 nm, and the wavelength of light received by the third detector 206 is 1310 nm.

[0075] In some embodiments of the present application, the number of light sources in the optical transceiver assembly 124 may be 2, 3, 4, 5 or more, and the embodiments of the present application do not impose any limitation on this.

[0076] In some embodiments, the optical transceiver assembly 124 may further include other components such as an electro-optical modulator and a photodetector, which are not described in detail here.

[0077] Figure 8b This is a structural diagram of another optical transceiver assembly 124 provided in an embodiment of the present application. Figure 8b , Figure 8b The packaging form of the optical transceiver assembly 124 can be regarded as a semiconductor cap (TO) package based on a coaxial base. Figure 8b In the example shown in FIG, the transceiver assembly 124 includes a first light source 021, a second light source 022, a third light source 203, and a lens assembly 208. The lens assembly 208 is used to shape the light emitted by the first light source 021, the second light source 022, and the third light source 203. The first light source 021, the second light source 022, and the third light source 203 are packaged using a semiconductor cap package. Figure 8b For the rest of the structure, please refer to Figure 8a The description is not repeated here.

[0078] Please return Figure 4 The optical connector 130 is connected to the first optical connector 121. For example, the optical connector 130 and the first optical connector 121 are connected via the fourth optical waveguide 104. The optical fiber distribution frame is connected to the second optical connector 122. For example, the optical fiber distribution frame and the second optical connector 122 are connected via the fifth optical waveguide 105.

[0079] As mentioned above, the board 100 and the chassis 210 (such as Figure 3(as shown) detachably connected. For example, the board 100 and chassis 210 are snap-fitted together using a wrench. In some embodiments, the board 100 has two sides, a front side and a rear side. The board 100 and chassis 210 are inserted from the front side toward the rear side. When the board 100 and chassis 210 are snap-fitted together, i.e., when the board 100 is installed in the chassis 210, the front side of the board 100 faces the outside of the chassis 210. The user can view the front side of the board 100.

[0080] In some embodiments of the present application, the optical module 120 is located on the front side of the board 110. Figure 3 When the board 100 and the chassis 210 are in a snap-in state, the user can assemble a device connected to the optical module 120 (such as an optical time domain reflectometer 220 or an optical fiber distribution frame) without separating the board 100 and the chassis 210.

[0081] Illustratively, the second optical connector 122 of the optical module 120 faces the front side of the board 110, and the first optical connector 121 of the optical module 120 faces the rear side of the board 110. In an embodiment in which the second optical connector 122 and the fifth optical waveguide 105 are detachably connected, when the board 100 and the chassis 210 are in a snap-fit ​​state, the user can plug and unplug the fifth optical waveguide 105 without removing the board 100.

[0082] In some embodiments of the present application, the optical connector 130 and the optical time domain reflectometer 220 are detachably connected, which can facilitate separation of the board 100 and the optical time domain reflectometer 220 .

[0083] Exemplarily, the optical connector 130 and the optical time domain reflectometer 220 are connected via the sixth optical waveguide 106. The sixth optical waveguide 106 is used to transmit signals between the optical connector 130 and the optical time domain reflectometer 220. In some embodiments, the optical connector 130 and the sixth optical waveguide 106 are detachably connected. For example, the optical connector 130 and the sixth optical waveguide 106 are detachably connected via a fiber optic connector.

[0084] Exemplarily, the optical connector 130 includes a first end 131 and a second end 132, and the first end 131 and the second end 132 are arranged relative to each other. The embodiments of the present application do not limit the structures of the first end 131 and the second end 132. Exemplarily, the first end 131 and the second end 132 can both be optical interfaces. The first end 131 is connected to the optical module 120. For example, the first end 131 is connected to the first optical connector 121 of the optical module 120. In an embodiment in which the optical film block 120 is configured with a fourth optical waveguide 104, the first end 131 is connected to the first optical connector 121 via the fourth optical waveguide 104. The second end 132 is connected to the optical time domain reflectometer 220. For example, the second end 132 and the optical time domain reflectometer 220 are connected via the sixth optical waveguide 106. In some embodiments, the second end 132 and the sixth optical waveguide 106 are detachably connected.

[0085] In some embodiments, the second end 132 of the optical connector 130 and the second optical connector 122 are both oriented toward the same side of the board 100. For example, the second end 132 of the optical connector 130 and the second optical connector 122 are both oriented toward the front side of the board 100. This makes it more convenient for a user to plug and unplug the sixth optical waveguide 106 connected to the second end 132 without having to remove the board 100 from the chassis 210.

[0086] Figure 9 Another structural schematic diagram of the optical time domain reflectometer 220 and the single board 100 provided in an embodiment of the present application. Figure 9 In the example shown in FIG, the optical connector 130 is located on the rear side of the board 110 . That is, the optical connector 130 and the optical module 120 are located on different sides of the board 110 .

[0087] Figure 9 In the embodiment, the second end 132 of the optical connector 130 and the second optical connector 122 face opposite sides of the board 100. For example, the second end 132 of the optical connector 130 faces the rear side of the board 100, and the second optical connector 122 faces the front side of the board 100.

[0088] In the embodiment where the second end 132 of the optical connector 130 is connected to the second optical connector 122 via the sixth optical waveguide 106, the connection position of the sixth optical waveguide 106 and the second end 132 faces the rear side of the single board 100. This helps to hide the sixth optical waveguide 106 and improve the appearance of the single board 100.

[0089] exist Figure 9 In the example of FIG, the optical connector 130 can be arranged at the edge of the rear side of the single board 100. Alternatively, the optical connector 130 can be arranged in the middle of the single board 100, and can be arranged according to the distribution relationship of other components on the single board 100.

[0090] Figure 10 This is a structural diagram of another single board 100 provided in an embodiment of the present application. Figure 10 In some embodiments of the present application, the board 100 may further include a first optical switch 201. The first optical switch 201 is connected to the board 110. The optical connector 130 is connected to the first optical switch 201. The first optical switch 201 is also connected to the first optical connector 121. In other words, the optical connector 130 is connected to the first optical connector 121 via the first optical switch 201.

[0091] As described above, the single board 100 includes multiple optical modules 120. Each optical module 120 includes a first optical connector 121. If there are multiple optical modules 120, the single board 100 includes multiple first optical connectors 121. The first optical connectors 121 of the multiple optical modules 120 are all connected to the first optical switch 201. The first optical switch 201 is used to perform physical switching or logical operations on the signal output by the optical connector 130. Because the signal output by the optical connector 130 comes from the optical time domain reflectometer 220, the first optical switch 201 can perform physical switching or logical operations on the signal output by the optical time domain reflectometer 220 and transmit it to each first optical connector 121, so that the light beam output by the second optical connector 122 of each optical module 120 carries the signal of the optical time domain reflectometer 220. Identifying the signal of the optical time domain reflectometer 220 can identify the second optical connector 122.

[0092] As a result, the first optical switch 201 and the plurality of optical modules 120 are connected. Figure 5 In the example, the first optical switch 201 has multiple first optical interfaces 2011, each of which is connected to the first optical connector 121 of an optical module 120. In this way, the first optical switch 201 physically switches the signal from the optical time domain reflectometer 220 and transmits it to the first optical connector 121. A single first optical switch 201 can transmit the signal from the optical time domain reflectometer 220 to multiple first optical connectors 121. This improves the integration of the board 100, reduces the number of components on the board 100, and reduces the size of the board 100.

[0093] In some embodiments of the present application, the number of first optical interfaces 2011 is equal to the number of optical modules 120, and the first optical connectors 121 are connected one-to-one. In some embodiments of the present application, the number of first optical interfaces 2011 is greater than the number of optical modules 120, and some of the first optical interfaces 2011 are connected one-to-one with the first optical connectors 121, while the remaining first optical interfaces 2011 are not connected to the first optical connectors 121. For example, the remaining first optical interfaces 2011 may not transmit signals.

[0094] In embodiments where the first optical connector 121 is configured with a fourth optical waveguide 104, in some embodiments of the present application, the first optical interface 2011 is connected to the first optical connector 121 via the fourth optical waveguide 104. For example, one end of the fourth optical waveguide 104 is connected to the first optical interface 2011. The other end of the fourth optical waveguide 104 is connected to the first optical connector 121. The number of fourth optical waveguides 104 is the same as the number of first optical interfaces 2011. For example, if there are 16 optical modules 120, the number of first optical interfaces 2011 is 16, and the number of fourth optical waveguides 104 is 16.

[0095] The embodiment of the present application does not limit the connection method between the fourth optical waveguide 104 and the first optical interface 2011. For example, the fourth optical waveguide 104 and the first optical interface 2011 are detachably connected, facilitating separation and installation of the fourth optical waveguide 104 from the first optical interface 2011, and facilitating replacement or repair of the first optical switch 201. For example, if there are 16 optical modules 120, the number of first optical interfaces 2011 is 16, and the number of fourth optical waveguides 104 is 16.

[0096] For example, the first optical switch 201 is connected to the optical time domain reflectometer 220 via the seventh optical waveguide 107. One end of the seventh optical waveguide 107 is connected to the first optical switch 201, and the other end of the seventh optical waveguide 107 is connected to the optical time domain reflectometer 220. Since there is only one first optical switch 201, there is also only one seventh optical waveguide 107, which effectively simplifies the installation process of the single board 100, facilitates miniaturization of the single board 100, and avoids the problem of cluttered wiring caused by a large number of optical waveguides.

[0097] This embodiment of the present application does not limit the connection method between the seventh optical waveguide 107 and the first optical switch 201. For example, the seventh optical waveguide 107 is detachably connected to the first optical switch 201 to facilitate replacement and repair of the first optical switch 201. Alternatively, the seventh optical waveguide 107 is fixedly connected to the first optical switch 201. Similarly, the seventh optical waveguide 107 is detachably connected to the optical time domain reflectometer 220, or the seventh optical waveguide 107 is fixedly connected to the optical time domain reflectometer 220.

[0098] exist Figure 10 In this example, if the signal from the optical time-domain reflectometer 220 can be transmitted to each optical module 120, the number of seventh optical waveguides 107, sixth optical waveguides 106, and fourth optical waveguides 104 is relatively small, making the overall optical network layout more concise and reducing assembly difficulty. Furthermore, the optical network has a higher degree of integration and a smaller size.

[0099] In some embodiments of the present application, there may be multiple optical switches.

[0100] Figure 11This is a structural diagram of another single board 100 provided in an embodiment of the present application. Figure 11 The board 100 may further include: multiple second optical switches 202. Each of the multiple second optical switches 202 is connected to the board body 110. Each of the multiple second optical switches 202 is connected to the optical connector 130. The multiple second optical switches 202 are also connected to the first optical connector 121 of the optical module 120. Since the board 100 has multiple optical modules 120, the board 100 also has multiple first optical connectors 121. The second optical switch 202 has at least one second optical interface 2021, and each second optical interface 2021 is connected to the first optical connector 121 of each optical module 120.

[0101] In this way, multiple second optical switches 202 can physically switch and transmit signals from the optical time domain reflectometer 220 to the first optical connector 121. Each second optical switch 202 is connected to at least one first optical connector 121. If a second optical interface 2021 fails, only the faulty second optical switch 202 can be replaced or repaired, without having to replace all second optical switches 202. This reduces the cost and difficulty of replacement and repair.

[0102] The embodiment of the present application does not limit the number of second optical interfaces 2021 included in a second optical switch 202 . For example, a second optical switch 202 may include one, two, three, or more second optical interfaces 2021 . Figure 11 In the example, the number of second optical switches 202 is two. In some embodiments, the sum of the number of second optical interfaces 2021 of all second optical switches 202 may be greater than or equal to the number of first optical connectors 121. For example, some second optical interfaces 2021 may not be connected to the first optical connector 121.

[0103] In the embodiment where the first optical connector 121 is configured with the fifth optical waveguide 105 , the second optical interface 2021 is connected to the first optical connector 121 through the fifth optical waveguide 105 .

[0104] Exemplarily, the second optical switch 202 is connected to the optical connector 130 via the seventh optical waveguide 107. One end of the seventh optical waveguide 107 is connected to the second optical switch 202, and the other end of the seventh optical waveguide 107 is connected to the optical connector 130. Since there are multiple second optical switches 202, there are also multiple seventh optical waveguides 107, and one seventh optical waveguide 107 is connected to one second optical interface 2021.

[0105] Figure 11Even if there are multiple second optical switches 202, the number of seventh optical waveguides 107 is the same as the number of second optical switches 202, that is, multiple. As the integration level of the optical module 120 increases, the total number of the fourth optical waveguide, the sixth optical waveguide, and the fifth optical waveguide is also small, which helps to improve the integration level of the single board 100.

[0106] In some embodiments of the present application, the board 100 may not be provided with an optical switch. Figure 4 or Figure 9 As shown, optical connector 130 is connected to first optical connector 121 of optical module 120 via fourth optical waveguide 104. One end of fourth optical waveguide 104 is connected to optical connector 130, while the other end of fourth optical waveguide 104 is connected to optical connector 130. This further reduces the number of components on board 100, facilitating miniaturization of board 100. Furthermore, the assembly process of board 100 can be further simplified, thereby improving the integration of the optical network and reducing its size.

[0107] In some embodiments of the present application, the board 100 may further include other structures such as a wrench 160 . The wrench 160 is connected to the board body 110 , and the board 100 is connected to the chassis 210 via the wrench 160 .

[0108] The above description is only a specific embodiment of the present application. Any changes or substitutions within the technical scope disclosed in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An optical module, characterized in that: The optical module includes: case; a first optical connector connected to the housing; an optical transceiver assembly, located in the housing; a second optical connector connected to the housing; A light splitting element is located in the housing, and the first optical connector, the optical transceiver assembly and the second optical connector are all connected to the light splitting element; The spectrometer is used to combine the light beam from the first optical connector and the light beam from the optical transceiver assembly and transmit them to the second optical connector; or the spectrometer is used to split the light beam from the second optical connector and transmit them to the first optical connector and the optical transceiver assembly respectively.

2. The optical module according to claim 1, wherein The optical module further includes: An electrical connector is connected to the housing, is electrically connected to the optical transceiver assembly, and is disposed on the same side of the housing as the first optical connector.

3. The optical module according to claim 1 or 2, characterized in that: The optical module further comprises: a first optical waveguide, a second optical waveguide and a third optical waveguide; the first optical connector is connected to the optical splitter element via the first optical waveguide; The optical transceiver assembly is connected to the optical splitter element via the second optical waveguide; The second optical connector is connected to the light splitting element through the third optical waveguide.

4. The optical module according to any one of claims 1 to 3, characterized in that: The optical module further includes a heat dissipation layer, which is located inside the housing, and the optical transceiver assembly is connected to the heat dissipation layer.

5. A single board, characterized in that: The single board includes: plate body; an optical connector connected to the board; Multiple optical modules according to any one of claims 1-4; multiple optical modules are connected to the board; the first optical connectors of multiple optical modules are connected to the optical connector.

6. The single board according to claim 5, characterized in that The single board also includes: a first optical switch, which is connected to the board body; the optical connector is connected to the first optical switch; the first optical switch has multiple first optical interfaces, and one of the first optical interfaces is connected to the first optical connector of one of the optical modules.

7. The single board according to claim 5, characterized in that The single board also includes: multiple second optical switches, each of which is connected to the board body and connected to the optical connector; the second optical switch has at least one second optical interface, and one second optical interface is connected to the first optical connector of one of the optical modules.

8. The single board according to any one of claims 5 to 7, characterized in that: The optical connector includes a first end and a second end, the first end being connected to the first optical connector; The second end and the second optical connector are both oriented toward the same side of the single board; or, the second end and the first optical connector are oriented toward two opposite sides of the single board.

9. The single board according to any one of claims 5 to 8, characterized in that: The single board further includes: a printed circuit board, the printed circuit board is connected to the board body, and the optical module is connected to the printed circuit board.

10. An optical network terminal, characterized in that: The optical network terminal comprises: an optical time domain reflectometer and the board according to any one of claims 5 to 9; the optical time domain reflectometer is connected to the first optical connector.

11. The optical network terminal according to claim 10, characterized in that: The optical network terminal also includes: Fiber optic distribution frame; the second optical connectors of the plurality of optical modules are all connected to the fiber optic distribution frame.

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