Optical module, optical line terminal and signal processing method

Abstract

The embodiment of the invention discloses an optical module, an optical line terminal and a signal processing method, which are used for realizing smooth switching of a PON (Passive Optical Network) from time division to wavelength division. The optical module provided by the embodiment of the invention comprises: a light splitting unit used for splitting an uplink optical signal into a first optical signal and a second optical signal with the same bearing information, the uplink optical signal comprising a first low-rate signal and a high-rate signal with mutually conflicting wavelengths in a time division mode, in the wavelength division mode, a second low-rate signal and a high-rate signal of which the wavelengths do not conflict are included; the first low-rate light receiving assembly is used for detecting a first low-rate signal in the first light signals in a time division mode; the wave division unit is used for separating a high-rate signal and a low-rate signal from the second optical signal, and the low-rate signal is a second low-rate signal in a wave division mode; the second low-rate light receiving assembly is used for detecting a second low-rate signal in the wavelength division mode; and the high-speed light receiving assembly is used for detecting a high-speed signal in a time division mode and a wavelength division mode.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical communications, and in particular to an optical module, an optical line terminal, and a signal processing method. Background Art

[0002] Passive optical network (PON) is a point-to-multipoint optical fiber transmission and access technology. PON includes optical line terminal (OLT), optical distribution network (ODN) and optical network terminal (ONT). Users access PON through ONT to achieve communication.

[0003] As the demand for bandwidth access speed increases, PON will evolve from lower-speed EPON and 10G PON to higher-speed 25G PON, 50G PON, etc. Since some users are not in a hurry to upgrade bandwidth, the existing large number of low-speed ONTs in PON will be gradually replaced by higher-speed ONTs over a long period of time. Therefore, the PON network will have the coexistence of low-speed EPON and 10G PON and high-speed 25GPON and 50G PON.

[0004] Some low-rate signals (such as EPON signals) have wavelength conflicts with high-rate signals. If the PON also includes a low-rate ONT corresponding to the low-rate signal, the low-rate signal and the high-rate signal are transmitted in the PON in a time-division multiplexing manner due to the wavelength conflict between the low-rate signal and the high-rate signal. After all the low-rate ONTs in the PON are eliminated, the wavelengths of the signals of different rates transmitted in the PON do not conflict with each other. At this time, transmitting signals of different rates in a time-division multiplexing manner will cause a waste of bandwidth. Summary of the invention

[0005] The embodiments of the present application provide an optical module, an optical line terminal and a signal processing method for realizing smooth switching of a PON network from time division to wavelength division and improving the bandwidth of the PON network.

[0006] In the first aspect, an embodiment of the present application provides an optical module. The optical module includes a splitter unit, a first low-rate optical receiving component, a wave splitter unit, a second low-rate optical receiving component and a high-rate optical receiving component. Among them, the splitter unit is used to split the uplink optical signal into a first optical signal and a second optical signal. The first optical signal and the second optical signal carry the same information. The uplink optical signal includes a first low-rate signal and a high-rate signal with conflicting wavelengths in the time division mode, and includes a second low-rate signal and a high-rate signal with non-conflicting wavelengths in the wavelength division mode. The first low-rate optical receiving component is used to detect the first low-rate signal in the first optical signal in the time division mode. The wave splitter unit is used to separate the high-rate signal and the low-rate signal from the second optical signal, the high-rate signal is transmitted to the high-rate optical receiving component, and the low-rate signal is transmitted to the second low-rate optical receiving component. In the wavelength division mode, the low-rate signal is the second low-rate signal. The second low-rate optical receiving component is used to detect the second low-rate signal in the wavelength division mode. The high-rate optical receiving component is used to detect the high-rate signal in the time division mode and the wavelength division mode.

[0007] In an embodiment of the present application, on the one hand, the uplink optical signal is divided into two paths with the same content by a splitter unit, so that the detection of the high-speed signal and the first low-speed signal (with conflicting wavelengths in the time-division mode) is respectively realized by different optical receiving components (a first low-speed optical receiving component and a high-speed optical receiving component). In the time-division mode, different optical receiving components are used to meet the different requirements of the high-speed signal and the first low-speed signal for the optical detector chip in the optical receiving component, thereby improving the system performance. On the other hand, the second optical signal is divided into a high-speed signal and a second low-speed signal by a wavelength splitter unit, so that the high-speed signal will not enter the second low-speed optical receiving component, thereby ensuring the performance of the second low-speed signal. In this way, the optical module supports the detection of the uplink optical signal in the wavelength division mode, which can improve the system bandwidth compared to the time-division mode.

[0008] The optical module provided in the embodiment of the present application can support the detection of the uplink optical signal in the time division mode before the low-rate ONT (such as the Fabry-Perot FP type EPONONT) is completely de-networked (i.e., replaced by a higher-rate ONT); and after the low-rate ONT is completely de-networked, it can support the detection of the uplink optical signal in the wavelength division mode. Through one optical module, the signal detection before and after the low-rate ONT is de-networked can be compatible, and the evolution of these two stages can be realized. Thereby, the replacement frequency of the optical module can be reduced, the design service life of the optical module can be extended, and the cost of the PON network evolution can be reduced.

[0009] In an optional implementation, in the time division mode, the first low-rate signal includes an EPON signal, and the high-rate signal includes at least one of a 50G PON signal, a 25G EPON signal, and a 25GS-PON signal.

[0010] In an optional implementation, in the time division mode, the first low-rate signal also includes a 10G EPON signal time-division multiplexed with the EPON signal.

[0011] In an optional implementation, in the wavelength division mode, the second low-rate signal includes a 10G EPON signal, and the high-rate signal includes at least one of a 50G PON signal, a 25G EPON signal, and a 25GS-PON signal.

[0012] In an optional implementation, the optical module also includes a first electrical chip, a first pin, a second electrical chip, and a second pin. The first pin and the second pin are both used to connect to a media access control MAC chip. The first low-rate optical receiving component is specifically used to detect a signal of a first rate and a signal of a second rate in a first low-rate signal to obtain a first electrical signal and a second electrical signal. The first electrical chip is used to process the first electrical signal and the second electrical signal, and multiplex the two signals obtained by processing, and output the multiplexed signal to the MAC chip through the first pin. The second low-rate optical receiving component is specifically used to detect a signal of a third rate and a signal of a fourth rate in a second low-rate signal to obtain a third electrical signal and a fourth electrical signal. The second electrical chip is used to process the third electrical signal and the fourth electrical signal, and multiplex the two signals obtained by processing, and output the multiplexed signal to the MAC chip through the second pin.

[0013] In an embodiment of the present application, the decision and multiplexing of different rate signals in the first low-rate signal are implemented through the first electrical chip, and the decision and multiplexing of different rate signals in the second low-rate signal are implemented through the second electrical chip, so that the transmission of multi-rate decision signals is realized through one pin (first pin or second pin), which can reduce the number of pins and increase the number of optical modules that can be connected to the MAC chip.

[0014] In an optional implementation, the optical module further includes a switch and a control unit. The first connection end and the second connection end of the switch are connected to each other. The first connection end is used to communicate with the media access control MAC chip, and the second connection end is used to connect to the first low-rate optical receiving component or the second low-rate optical receiving component. The control unit is used to control the second connection end to connect to the first low-rate optical receiving component in the time division mode and to connect to the second low-rate optical receiving component in the wavelength division mode according to the instruction of the MAC chip.

[0015] In an embodiment of the present application, switching from the time division mode to the wavelength division mode is achieved by switching a switch. The electrical chip (located on the path between the first connection end and the MAC chip) can process the analog electrical signal of the first low-rate signal in the time division mode, and process the analog electrical signal of the second low-rate signal in the wavelength division mode. In other words, at different stages of network evolution (i.e., the time division mode and the wavelength division mode), the same electrical chip is used to process analog electrical signals, which can reduce the number of electrical chips in the optical module (as well as the number of pins corresponding to the electrical chip), thereby reducing the chip layout area and complexity, and reducing costs.

[0016] In an optional implementation, the light splitting unit includes any one of a light splitter, a prism and a splitter.

[0017] In an optional implementation manner, the optical splitting unit is specifically used to: split the uplink optical signal into the first optical signal and the second optical signal according to a set power ratio.

[0018] Optionally, the power ratio may be set to 1:1, 6:4, 4:6, 7:3, etc., which is not limited in this application.

[0019] In a second aspect, an embodiment of the present application provides an optical line terminal OLT. The OLT includes a media access control MAC chip and the optical module described in the first aspect. The MAC chip is used to communicate with the optical module. The MAC chip is used to: obtain first detection information of an uplink optical signal in a time division mode, the first detection information including the detection result of the optical module for a high-rate signal and a first low-rate signal. Obtain second detection information of an uplink optical signal in a wavelength division mode, the second detection information including the detection result of the optical module for a high-rate signal and a second low-rate signal.

[0020] The beneficial effects of the second aspect refer to the first aspect and will not be repeated here.

[0021] In an optional implementation, the optical module further includes a first pin, a second pin, and a third pin. The first pin, the second pin, and the third pin are all connected to the MAC chip. The first pin is used to communicate with the first low-rate optical receiving component, the second pin is used to communicate with the second low-rate optical receiving component, and the third pin is used to communicate with the high-rate optical receiving component. The MAC chip can obtain the first detection information based on the information from the first pin and the third pin in the time division mode. The MAC chip can obtain the second detection information based on the information from the second pin and the third pin in the wavelength division mode.

[0022] In the embodiment of the present application, the MAC chip obtains the detection information of the uplink optical signal based on the information of the corresponding pin in the corresponding mode (time division mode or wavelength division mode). In other words, the switching between different modes is realized by the processing of data by the MAC chip, and there is no need to set corresponding devices at the hardware level to realize mode switching, and the hardware structure is simple.

[0023] In an optional implementation, the first low-rate signal includes a signal of a first rate and a signal of a second rate, and the second low-rate signal includes a signal of a third rate and a signal of a fourth rate. The optical module also includes a first electrical chip and a second electrical chip. Among them, the first electrical chip is communicatively connected to the first low-rate optical receiving component. The first electrical chip is used to process the first electrical signal and the second electrical signal, and multiplex the two-way processing results obtained by processing, and output the multiplexed processing results to the MAC chip through the first pin. The first electrical signal and the second electrical signal are the detection results of the first low-rate optical receiving component for the signal of the first rate and the signal of the second rate. The second electrical chip is communicatively connected to the second low-rate optical receiving component. The second electrical chip is used to process the third electrical signal and the fourth electrical signal, and multiplex the two-way processing results obtained by processing, and output the multiplexed processing results to the MAC chip through the second pin. The third electrical signal and the fourth electrical signal are the detection results of the second low-rate optical receiving component for the signal of the third rate and the signal of the fourth rate.

[0024] In an embodiment of the present application, the decision and multiplexing of different rate signals in the first low-rate signal are implemented through the first electrical chip, and the decision and multiplexing of different rate signals in the second low-rate signal are implemented through the second electrical chip, so that the transmission of multi-rate decision signals is realized through one pin (first pin or second pin), which can reduce the number of pins and increase the number of optical modules that can be connected to the MAC chip.

[0025] In an optional implementation, the MAC chip is also used to: control the first electrical chip to operate in the time division mode and shut down in the wavelength division mode; and control the second electrical chip to operate in the wavelength division mode and shut down in the time division mode.

[0026] In an embodiment of the present application, the second electrical chip corresponding to the wavelength division mode is turned off in the time division mode, and the first electrical chip corresponding to the time division mode is turned off in the wavelength division mode, thereby turning off the corresponding electrical chips when not necessary, thereby reducing the power consumption of the optical module.

[0027] In an optional implementation, the optical module further includes a switch and a control unit. The first connection end and the second connection end of the switch are connected to each other. The first connection end is used to communicate with the MAC chip, and the second connection end is used to connect to the first low-rate optical receiving component or the second low-rate optical receiving component. The control unit is used to control the second connection end to connect to the first low-rate optical receiving component in the time division mode and to connect to the second low-rate optical receiving component in the wavelength division mode according to the instruction of the MAC chip.

[0028] In an embodiment of the present application, switching from the time division mode to the wavelength division mode is achieved by switching a switch. The electrical chip (located on the path between the first connection end and the MAC chip) can process the analog electrical signal of the first low-rate signal in the time division mode, and process the analog electrical signal of the second low-rate signal in the wavelength division mode. In other words, at different stages of network evolution (i.e., the time division mode and the wavelength division mode), the same electrical chip is used to process analog electrical signals, which can reduce the number of electrical chips in the optical module (as well as the number of pins corresponding to the electrical chip), thereby reducing the chip layout area and complexity, and reducing costs.

[0029] In a third aspect, an embodiment of the present application provides a signal processing method. The method is applied to an optical line terminal OLT, which includes a media access control MAC chip and the optical module described in the first aspect. The method includes: obtaining first detection information of an uplink optical signal in a time division mode, the first detection information including the detection result of the optical module on a high-rate signal and a first low-rate signal. Obtaining second detection information of an uplink optical signal in a wavelength division mode, the second detection information including the detection result of the optical module on a high-rate signal and a second low-rate signal.

[0030] In an optional implementation, the optical module also includes a first pin, a second pin, and a third pin. The first pin, the second pin, and the third pin are all connected to the MAC chip. The first pin is used to communicate with a first low-rate optical receiving component, the second pin is used to communicate with a second low-rate optical receiving component, and the third pin is used to communicate with a high-rate optical receiving component. The action of obtaining first detection information of an uplink optical signal in a time division mode may specifically include: the MAC chip obtains first detection information based on information from the first pin and the third pin in the time division mode. The action of obtaining second detection information of an uplink optical signal in a wavelength division mode may specifically include: the MAC chip obtains second detection information based on information from the second pin and the third pin in the wavelength division mode.

[0031] In an optional implementation, the first low-rate signal includes a signal of a first rate and a signal of a second rate, and the second low-rate signal includes a signal of a third rate and a signal of a fourth rate. The optical module also includes a first electrical chip and a second electrical chip. The first electrical chip is communicatively connected to the first low-rate optical receiving component, and is used to process the first electrical signal and the second electrical signal, and multiplex the two-way processing results obtained by processing, and output the multiplexed processing results to the MAC chip through the first pin. Among them, the first electrical signal and the second electrical signal are the detection results of the first low-rate optical receiving component for the signal of the first rate and the signal of the second rate. The second electrical chip is communicatively connected to the second low-rate optical receiving component, and is used to process the third electrical signal and the fourth electrical signal, and multiplex the two-way processing results obtained by processing, and output the multiplexed processing results to the MAC chip through the second pin. Among them, the third electrical signal and the fourth electrical signal are the detection results of the second low-rate optical receiving component for the signal of the third rate and the signal of the fourth rate.

[0032] In an optional implementation, the method further includes: controlling the first electrical chip to operate in the time division mode and to be turned off in the wavelength division mode; and controlling the second electrical chip to operate in the wavelength division mode and to be turned off in the time division mode.

[0033] In an optional implementation, the optical module further includes a switch and a control unit. The first connection end and the second connection end of the switch are connected to each other. The first connection end is used to communicate with the MAC chip, and the second connection end is used to connect to the first low-rate optical receiving component or the second low-rate optical receiving component. The method also includes: issuing an instruction to the control unit, the instruction is used to instruct the control unit to control the second connection end to connect to the first low-rate optical receiving component in the time division mode, and to connect to the second low-rate optical receiving component in the wavelength division mode.

[0034] The beneficial effects of the third aspect refer to the first aspect or the second aspect and will not be repeated here.

[0035] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, characterized in that a program is stored in the computer-readable storage medium, and when a computer executes the program, the method described in the third aspect is executed.

[0036] In a fifth aspect, an embodiment of the present application provides a computer program product, characterized in that when the computer program product is executed on a computer, the computer executes the method described in the third aspect.

[0037] The beneficial effects of the fourth to fifth aspects refer to the third aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the architecture of the passive optical network PON provided in this application;

[0039] Figure 2 Schematic diagram of wavelength ranges of PON signals of different rates provided by this application;

[0040] Figure 3 A schematic diagram of the structure of an optical module provided in an embodiment of the present application;

[0041] Figure 4 A schematic diagram of the composition of an uplink optical signal in a time division mode and in a wavelength division mode provided in an embodiment of the present application;

[0042] Figure 5 A schematic diagram of the structure of an OLT provided in an embodiment of the present application;

[0043] Figure 6 Another structural diagram of the OLT provided in the embodiment of the present application;

[0044] Figure 7 A flowchart of a signal processing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0046] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged in appropriate circumstances, which is only to describe the distinction mode adopted by the objects of the same attribute in the embodiments of the present application when describing. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment containing a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment. In addition, "at least one" refers to one or more, and "multiple" refers to two or more. "And / or", describes the association relationship of associated objects, indicating that three relationships can exist, for example, A and / or B, can represent: A exists alone, A and B exist simultaneously, and B exists alone, wherein A, B can be singular or plural. The character " / " generally represents that the associated objects before and after are a kind of "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0047] Figure 1 FIG. 1 is a schematic diagram of the architecture of the passive optical network PON of the present application. Figure 1 As shown, the PON network includes an optical line terminal OLT, an optical distribution network ODN and multiple optical network terminals ONT (for example Figure 1 OLT is used to communicate with upstream service nodes, and ONT is used to communicate with downstream user nodes. Optionally, user nodes include but are not limited to user equipment (UE) such as mobile phones and computers. ODN has a point-to-multipoint topology, and OLT realizes communication connection with multiple ONTs through ODN. Communication between OLT and ONT can realize communication between service nodes and user nodes.

[0048] Among them, the OLT includes a single board and multiple optical modules (for example Figure 1 The board includes a media access control (MAC) chip, which is used to communicate with the optical module. The optical module is used to connect to the ODN, thereby realizing communication connection with multiple ONTs through the ODN.

[0049] Optional, Figure 1 In the PON shown, the ONT may also be replaced by an optical network unit (ONU), which is not limited in the present application.

[0050] In PON, the optical module of OLT and ONT are used to realize the transmission and reception detection of signals. PON can be divided into EPON, 10G EPON, 25G EPON, 50G PON, etc. according to the rate. Correspondingly, ONT can include EPON ONT, 10G EPON ONT, 25G EPON ONT, 50GPON ONT, etc.

[0051] The currently widely used EPON and 10G EPON cannot meet the increasing demand for bandwidth access speed and will evolve to higher-speed 25G EPON, 50G PON, etc. In other words, the lower-speed EPON ONT and 10G EPON ONT in PON will be replaced by higher-speed 25G EPON ONT and 50G PON ONT.

[0052] Different users have different requirements for bandwidth access rates, and some users are not in a rush to upgrade bandwidth. Therefore, the replacement of low-rate ONTs in PON with high-rate ONTs will take a long time. Figure 1As shown, the optical module in the OLT is used to realize communication with multiple ONTs. The multiple ONTs communicating with the optical module may be ONTs of different rates, and the low-rate ONTs among the multiple ONTs will gradually be replaced by ONTs with higher rates.

[0053] For example Figure 1 The optical module 1 in is used to communicate with ONT 1, ONT 2 and ONT 3. For example, ONT 1 and ONT 2 can be EPON ONTs, and ONT 3 can be 10G EPON ONTs. If the user upgrades ONT 1 and ONT 2 successively, and replaces ONT 1 and ONT 2 from EPON ONT to 50G PON ONT successively. Before completing the upgrade iteration of ONT 1 and ONT 2, optical module 1 needs to support the transmission and reception of EPON signals, 10G EPON signals and 50G PON signals. After completing the upgrade iteration of ONT 1 and ONT 2, optical module 1 needs to support the transmission and reception of 10G EPON signals and 50G PON signals.

[0054] Figure 2 Figure 1 is a schematic diagram of the wavelength range of PON signals at different rates. In the existing network, most (about 90%) of the lasers in EPON terminals are Fabry-Perot (FP) type lasers. Figure 2 As shown in the figure, the wavelength range of EPON FP ONT is 1260-1360nm, and the three wavelength plans of 50G PON upstream signals (UW1: 1260-1280nm, UW2: 1290-1310nm, UW3: 1284-1288nm) all fall within the range of 1260-1360nm. Therefore, the wavelengths of FP type EPON and 50GPON conflict with each other.

[0055] As mentioned above, during the evolution of PON (i.e. before completing the upgrade iteration of low-speed ONTs in PON), the optical module needs to support the transmission and reception of low-speed signals (such as EPON signals) and high-speed signals (such as 50G PON signals). Since the wavelengths of 50G PON signals and EPON signals conflict with each other, during the evolution to high-speed PON, the low-speed signals (EPON signals) and high-speed signals (50G PON signals) in the upstream optical signals are time-division multiplexed. That is, signals of different rates are transmitted in different time slots and are received in sequence by the same receiving component.

[0056] When all EPON ONTs in the PON are replaced with higher-speed ONTs, the signals transmitted between the optical module and the ONT do not include EPON signals. Figure 2As shown, except for the EPON signal, the wavelengths of signals of other rates do not conflict (for example, the wavelength range of the 10G EPON signal is 1260nm-1280nm, and the wavelength ranges of 50G PON UW2 and UW3 are 1290-1310nm and 1284-1288nm, respectively, which do not conflict with the wavelength of 10G PON). In other words, if the EPON ONTs communicating with the optical module are replaced with ONTs with higher rates, the optical module can use wavelength division multiplexing to realize the transmission of signals of different rates (for example, 10G EPON signals and 50G PON signals). At this time, since different ONT terminals use wavelength ranges that do not overlap with each other, signals of different rates can be concurrent, and are received by receiving components of different wavelength ranges after being split by the splitting component on the OLT optical module side.

[0057] Therefore, as mentioned above, the optical receiving components in the two cases are incompatible. If the optical receiving components of time division multiplexing are still used to receive the uplink multi-rate signals when the wavelengths do not conflict, the uplink multi-rate signals need to be transmitted in a time division manner, resulting in a huge waste of bandwidth.

[0058] In order to solve the above problems, the embodiments of the present application provide an optical module, an OLT and a signal processing method. The optical module provided in the embodiments of the present application can receive in a time division mode when there is a wavelength conflict, and can smoothly evolve to receive in a wavelength division mode when there is no wavelength conflict. By respectively setting different optical receiving components for different signals of the time division mode and the wavelength division mode, after completing the iterative upgrade of the EPON ONT, it is supported to switch from time division multiplexing to wavelength division multiplexing transmission mode, and the network bandwidth can be improved.

[0059] like Figure 3 As shown, the optical module 3000 provided in the embodiment of the present application includes: a splitter unit 3100, a wave splitter unit 3200, a high-rate optical receiving component 3300, a first low-rate optical receiving component 3400 and a second low-rate optical receiving component 3500.

[0060] The optical splitting unit 3100 is used to split the uplink optical signal into a first optical signal and a second optical signal according to a set power ratio. Since the optical splitting is based on power, the first optical signal and the second optical signal carry the same information.

[0061] Optionally, the light splitting unit 3100 may be a light splitter, a prism or a splitter, which is not limited in the present application.

[0062] Optionally, the set power ratio can be 1:1, 6:4, 4:6, 7:3, etc., which is not limited in this application.

[0063] The uplink optical signal can be divided into a time division mode and a wavelength division mode. In the time division mode, the uplink optical signal includes a first low-rate signal and a high-rate signal with conflicting wavelengths. The conflicting wavelengths mean that the first low-rate signal and the high-rate signal have overlapping wavelength bands. In the wavelength division mode, the uplink optical signal includes a second low-rate signal and a high-rate signal with non-conflicting wavelengths. The non-conflicting wavelengths mean that the wavelength bands of the second low-rate signal and the high-rate signal do not overlap.

[0064] In the time division mode, the uplink optical signal includes a first low-rate signal and a high-rate signal that are time-division multiplexed. Correspondingly, in the time division mode, the first optical signal and the second optical signal separated by the optical splitter 3100 both include a first low-rate signal and a high-rate signal. After the first optical signal is separated from the optical splitter 3100, it is transmitted to the first low-rate optical receiving component 3400. The first low-rate optical receiving component 3400 can detect the first low-rate signal in the first optical signal in the time division mode. After the second optical signal is separated from the optical splitter 3100, it is split by the wavelength splitter 3200, and the high-rate signal of the wavelength range corresponding to the high-rate signal is transmitted to the high-rate optical receiving component 3300, and the signal of the wavelength range corresponding to the low-rate signal is transmitted to the second low-rate optical receiving component 3500. The high-rate optical receiving component 3300 can detect the high-rate signal in the second optical signal in the time division mode.

[0065] In the optical receiving component, there is a negative correlation between the bandwidth and gain of the optical detector chip. Optical detector chips that are compatible with high-speed and low-speed signals usually require a larger bandwidth because they need to support the detection of high-speed signals with a large bandwidth, resulting in a lower photoelectric conversion gain of the optical detector chip. Compared with optical detection chips that only receive low-speed signals, the lower photoelectric conversion gain leads to a decrease in the signal-to-noise ratio of low-speed signals and an increase in the bit error rate. In other words, from the perspective of the optical detector chip, high-speed signals have a large bandwidth requirement, and low-speed signals have a large gain requirement.

[0066] In an embodiment of the present application, the optical splitter unit 3100 divides the uplink optical signal into two signals (a first optical signal and a second optical signal) carrying the same information. The two optical signals are transmitted to the high-speed optical receiving component 3300 and the first low-speed optical receiving component 3400, respectively. Thus, the detection of the time-division multiplexed high-speed signal and the first low-speed signal is achieved through different optical receiving components. The optical detector chip in the high-speed optical receiving component 3300 can meet the bandwidth requirements of the high-speed optical signal, and the optical detector chip in the first low-speed optical receiving component 3400 can meet the gain requirements of the low-speed optical signal. Compared with the traditional optical module structure, the structure in which multiple time-division multiplexed signals (high-speed signals and low-speed signals) are detected by one optical receiving component; the sub-rate detection of optical signals is realized. Different optical detector chips can be used to match the requirements of chips for signals of different rates, thereby reducing the performance cost of the signal detected by the optical receiving component and improving system performance.

[0067] In one example, in the uplink optical signal in the time division mode, the high-rate signal is a 50G PON signal, and the first low-rate signal is an EPON signal. Then, through the optical module 3000 structure of the embodiment of the present application, the large bandwidth requirement of the 50G PON signal can be met by the large-bandwidth optical detector chip in the high-rate optical receiving component 3300, and the bit error rate requirement of the EPON signal can be met by the high-gain optical detector chip in the first low-rate optical receiving component 3400 (ensuring that the bit error rate is not higher than e^-12), thereby improving system performance.

[0068] The high-speed receiver optical subassembly (ROSA) 3300 is also referred to as a high-speed ROSA 3300. Optionally, the high-speed ROSA 3300 may include an avalanche photo diode (APD), a trans-impedance amplifier (TIA), etc., which is not limited in the present application.

[0069] The first low-rate optical receiving assembly 3400 is also referred to as a first low-rate ROSA 3400. As above, the first low-rate ROSA 3400 may include an avalanche photo diode (APD), a transimpedance amplifier, etc., which is not limited in the present application.

[0070] With the evolution of PON, the low-rate EPON ONTs in the ONTs that communicate with the optical module 3000 are replaced with higher-rate ONTs. The optical module 3000 communicates with multiple ONTs through signals with non-conflicting wavelengths (such as 10G EPON signals, 25G EPON signals, and 50G PON signals), so the uplink optical signal can be transmitted in a wavelength division multiplexing manner, that is, a wavelength division mode.

[0071] In the wavelength division mode, the second low-rate signal and the high-rate signal are wavelength-division multiplexed. For the optical receiving component detecting the second low-rate signal, if both the high-rate signal and the second low-rate signal enter the optical receiving component, the high-rate signal with a large bandwidth will affect the performance of the second low-rate signal.

[0072] In order to ensure the performance of the second low-rate signal in the wavelength division mode, the optical module 3000 also includes a splitter unit 3200 and a second low-rate optical receiving component 3500. In the wavelength division mode, the uplink optical signal includes a second low-rate signal and a high-rate signal of wavelength division multiplexing. Correspondingly, in the wavelength division mode, the second optical signal separated by the splitter unit 3100 includes a second low-rate signal and a high-rate signal. After the second optical signal is separated from the splitter unit 3100, it enters the splitter unit 3200. The splitter unit 3200 splits the second optical signal according to the wavelength range of the high-rate signal and the wavelength range of the second low-rate signal to obtain a high-rate signal and a low-rate signal. In the wavelength division mode, the low-rate signal obtained by the splitting is the second low-rate signal. The high-rate signal is transmitted to the high-rate optical receiving component 3300, and the low-rate signal is transmitted to the second low-rate optical receiving component 3500. That is, in the wavelength division mode, the high-rate signal is detected by the high-rate optical receiving component 3300, and the second low-rate signal is detected by the second low-rate optical receiving component 3500.

[0073] The second low-rate optical receiving assembly 3500 is also referred to as a second low-rate ROSA 3500. As above, the second low-rate ROSA 3500 may include an APD, a preamplifier, etc., which is not limited in the present application.

[0074] Optionally, the wave splitting unit 3200 may be a wave plate, a wave splitter, etc., which is not limited in the present application.

[0075] In the embodiment of the present application, when the communication network no longer includes a low-rate ONT (e.g., an FP-type EPON ONT), the wavelength division detection of the upstream optical signal is realized by the wavelength division unit 3200, the high-rate optical receiving component 3300, and the second low-rate optical receiving component 3500. In other words, the optical module 3000 supports the detection of the wavelength division multiplexed upstream optical signal. Compared with the time division multiplexing transmission mode adopted by the PON network before the EPON ONT is replaced, wavelength division multiplexing can improve the utilization rate of bandwidth resources, thereby improving the network bandwidth.

[0076] In an optional implementation, the first low-rate signal includes an EPON signal, and the high-rate signal may include at least one of a 50G PON signal, a 25G EPON signal, and a 25GS-PON signal. Optionally, the first low-rate signal may also include a 10G EPON signal time-division multiplexed with the EPON signal, which is not limited in this application.

[0077] In an optional implementation, the second low-rate signal includes a 10G EPON signal, and the high-rate signal includes at least one of a 50G PON signal, a 25G EPON signal, and a 25GS-PON signal.

[0078] For example, if the high-rate signal is a 50G PON signal, the first low-rate signal is a time-division multiplexed EPON signal and a 10G EPON signal, and the second low-rate signal is a 10G EPON signal. Figure 4 As shown, in the time division mode, the EPON signal and the 10G EPON signal in the first low-rate signal are transmitted in a time division multiplexing manner, and the first low-rate signal and the high-rate signal are transmitted in a time division multiplexing manner. In this case, one signal transmission cycle occupies three time slots.

[0079] In wavelength division mode, the second low-rate signal is a 10G EPON signal, and the high-rate signal is a 50G PON signal. Since the wavelengths do not conflict, the second low-rate signal and the high-rate signal are transmitted in wavelength division multiplexing. In this case, one signal cycle occupies one time slot. Compared with time division multiplexing, the efficiency of signal transmission is greatly improved, and the network bandwidth is increased accordingly.

[0080] In summary, the optical module 3000 provided in the embodiment of the present application has the following advantages:

[0081] On the one hand, the uplink optical signal is divided into two paths with the same content by the optical splitter unit 3100, so that the high-rate signal (with conflicting wavelengths in the time division mode) and the first low-rate signal are detected respectively by different optical receiving components (the first low-rate optical receiving component 3400 and the high-rate optical receiving component 3300). Different optical receiving components are used to meet the different requirements of the high-rate signal and the first low-rate signal for the optical detector chip in the optical receiving component, thereby improving the system performance.

[0082] On the other hand, the second optical signal is divided into a high-rate signal and a second low-rate signal by the wavelength splitting unit 3200, so that the high-rate signal does not enter the second low-rate optical receiving component 3500, thereby ensuring the performance of the second low-rate signal. Thus, the optical module 3000 supports the detection of the uplink optical signal in the wavelength division mode, which can improve the system bandwidth compared with the time division mode.

[0083] The optical module 3000 provided in the embodiment of the present application can support the detection of the uplink optical signal in the time division mode before the EPON FP ONT is completely de-networked (i.e., replaced by an ONT with a higher rate); and after the EPON FP ONT is completely de-networked, it can support the detection of the uplink optical signal in the wavelength division mode. Through one optical module 3000, the signal detection before and after the EPON FP ONT is de-networked can be completed, and the evolution of these two stages can be realized. Thereby, the replacement frequency of the optical module can be reduced, the design service life of the optical module can be extended, and the cost of the PON network evolution can be reduced.

[0084] Optionally, in addition to EPON signals and 10G EPON signals, the first low-rate signal may also include GPON signals, XG(S)PON signals, etc., which are not limited in this application. Similarly, in addition to 10G EPON signals, the second low-rate signal may also include GPON signals, XG(S)PON signals, etc., which are not limited in this application.

[0085] Optional, except Figure 3 As shown in the device, the optical module 3000 may also include a transmitter optical subassembly (TOSA), an amplifier circuit, a microcontroller unit (MCU), etc., which is not limited in the present application.

[0086] Will Figure 3 The optical module 3000 shown is used in Figure 1The optical line terminal OLT shown is the OLT provided in the embodiment of the present application. In the OLT, the MAC chip is used to communicate with the optical module 3000. In an optional implementation, the MAC chip can filter the signal from the optical module 3000, thereby obtaining the detection information of the uplink optical signal of the time division multiplexing in the time division mode, and obtaining the detection information of the uplink optical signal of the wavelength division multiplexing in the wavelength division mode. The corresponding OLT structure is as follows: Figure 5 shown.

[0087] In this structure, the optical module 3000 further includes: a first electrical chip 3600, a first pin 3700, a second electrical chip 3800, a second pin 3900, a third electrical chip and a third pin. The first pin 2700, the second pin 3900 and the third pin are all used to communicate with the MAC chip.

[0088] It is worth noting that the pins mentioned in the embodiments of the present application (eg, the first pin 3700 , the second pin 3900 , and the third pin) all represent a pair of pins including positive and negative electrodes.

[0089] In the time division mode, the uplink optical signal includes a time-division multiplexed high-rate signal and a first low-rate signal. For example, the high-rate signal may include a 50G PON signal, and the first low-rate signal may include a time-division multiplexed EPON signal and a 10G EPON signal. Correspondingly, the high-rate optical receiving component 3300 is a 50G optical receiving component with an operating wavelength of 1284-1288nm; the first low-rate optical receiving component 3400 is a 1.25G&10G optical receiving component with an operating wavelength of 1260-1360nm.

[0090] like Figure 5 As shown, the optical splitter unit 3100 may be an optical splitter plate 3110. The wave splitter unit 3200 may include a first wave plate 3210, and the first wave plate 3210 is used to separate the 50G signal (high rate signal) from the second optical signal.

[0091] The first low-rate optical receiving component 3400 is specifically used to detect the EPON signal and the 10G EPON signal in the first low-rate signal to obtain a 1.25G analog electrical signal and a 10G analog electrical signal. The 1.25G analog electrical signal and the 10G analog electrical signal herein are also referred to as the first electrical signal and the second electrical signal, which are the detection results of the first low-rate optical receiving component 3400 on optical signals of different rates.

[0092] The first electrical chip 3600 is used to amplify, judge, and process the 1.25G analog electrical signal and the 10G analog electrical signal to obtain a 1.25G judgment signal and a 10G judgment signal. The first electrical chip 3600 multiplexes the processed 1.25G judgment signal and the 10G judgment signal, and outputs the multiplexed signal to the MAC chip through the first pin 3700. Optionally, the first electrical chip 3600 may be a physical layer (PHY) chip.

[0093] The third electrical chip is used to amplify, judge, and process the 50G analog electrical signal to obtain a 50G judgment signal. The third electrical chip outputs the 50G judgment signal to the MAC chip through the third pin. Optionally, the third pin may include one or two pins to transmit high-speed judgment signals (each pin represents a pair of pins including positive and negative electrodes), which is not limited in this application.

[0094] Therefore, in the time division mode, the MAC chip can obtain the first detection information of the uplink optical signal in the time division mode based on the information from the first pin 3700 (the decision signal of the first low-rate signal) and the information from the third pin (the decision signal of the high-rate signal).

[0095] With the evolution of PON, if the EPON ONTs communicating with the optical module 3000 are all iterated to higher-speed ONTs, the upstream optical signal is switched to the wavelength division mode. The upstream optical signal in the wavelength division mode includes a high-speed signal of wavelength division multiplexing and a second low-speed signal. For example, the second low-speed signal may include a 10G EPON signal. Correspondingly, the second low-speed optical receiving component 3500 is a 10G optical receiving component that can detect 10G EPON signals in symmetric mode and asymmetric mode, and the operating wavelength is 1260-1280nm & 1290-1330nm. Figure 5 As shown, the wave splitting unit 320 may further include a second wave plate 3220, and the second wave plate 3220 is used to separate the 10G EPON signal (the second low-rate signal) from the second optical signal.

[0096] The second low-rate optical receiving component 3500 is specifically used to detect the symmetrical 10G EPON signal and the asymmetrical 10G EPON signal in the second low-rate signal, and obtain a 10G symmetrical analog electrical signal and a 10G asymmetrical analog electrical signal (actually a signal of 1.25G rate). The 10G symmetrical analog electrical signal and the 10G asymmetrical analog electrical signal here are also called the third electrical signal and the fourth electrical signal, which are the detection results of the second low-rate optical receiving component 3500 on optical signals of different rates.

[0097] The second electrical chip 3800 is used to amplify, judge, and process the 10G symmetrical analog electrical signal and the 10G asymmetrical analog electrical signal to obtain a 10G symmetrical judgment signal and a 10G asymmetrical judgment signal. The second electrical chip 3800 multiplexes the processed 10G symmetrical judgment signal and the 10G asymmetrical judgment signal, and outputs the multiplexed signal to the MAC chip through the second pin 3900. Optionally, the second electrical chip 3800 may be a PHY chip.

[0098] Therefore, in the wavelength division mode, the MAC chip can obtain the second detection information of the upstream optical signal in the wavelength division mode based on the information from the second pin 3900 (the decision signal of the second low-rate signal) and the information from the third pin (the decision signal of the high-rate signal).

[0099] In an embodiment of the present application, the decision and multiplexing of different rate signals in the first low-rate signal are implemented through the first electrical chip, and the decision and multiplexing of different rate signals in the second low-rate signal are implemented through the second electrical chip, so that the transmission of multi-rate decision signals is realized through one pin (first pin or second pin), which can reduce the number of pins and increase the number of optical modules that can be connected to the MAC chip.

[0100] Optionally, if the number of pins of the MAC chip is sufficient, the first electrical chip 3600 can also process analog electrical signals of different rates through multiple electrical chips of different rates, and output decision signals of different rates through different pins. The second electrical chip 3800 is similar, and will not be described in detail here.

[0101] Optionally, if the number of pins of the MAC chip is sufficient, the first electrical chip 3600 and the second electrical chip 3800 may also transmit decision signals of different rates to the MAC chip through different pins (that is, in addition to the first pin, the first electrical chip 3600 may also be connected to other pins, and in addition to the second pin, the second electrical chip 3800 may also be connected to other pins). This application does not limit this.

[0102] Optionally, the MAC chip can also control the first electrical chip 3600 to operate in the time division mode and shut down in the wavelength division mode, and control the second electrical chip 3800 to operate in the wavelength division mode and shut down in the time division mode. In the time division mode, the second electrical chip 3800 corresponding to the wavelength division mode is shut down, and in the wavelength division mode, the first electrical chip 3600 corresponding to the time division mode is shut down, thereby shutting down the corresponding electrical chip when it is not necessary, which can reduce the power consumption of the optical module 3000.

[0103] It is worth noting that Figure 5The specific rates of the high-rate signal, the first low-rate signal, and the second low-rate signal shown are only examples, and the rates of the above three signals are not limited to the specific rates mentioned in the above examples.

[0104] Optionally, the first electrical chip 3600 , the second electrical chip 3800 and the third electrical chip may include a trans-impedance amplifier (TIA), a limiting amplifier (LA), etc., which is not limited in the present application.

[0105] Optionally, the optical module 3000 may also include 1490 / 1577 dual-transmit TO, 1342TO, etc., to achieve the transmission of corresponding rate signals.

[0106] In another implementation, the optical module 3000 can change the signal output by the pin through a switch, thereby outputting the detection result of the time division mode in the time division mode and outputting the detection result of the wavelength division mode in the wavelength division mode. The corresponding structure is as follows Figure 6 As shown, in this structure, the optical module 3000 further includes a switch and a control unit.

[0107] like Figure 6 As shown, the first connection end (left end) and the second connection end (right end) of the switch are connected to each other. The first connection end communicates with the MAC chip through components such as an electrical chip.

[0108] In the time division mode, the uplink optical signal includes a time-division multiplexed high-speed signal and a first low-speed signal. The first low-speed optical receiving component 3400 is used to detect the first low-speed signal. In this case, the MAC chip can issue an instruction to the control unit in the optical module through the I2C channel, and the instruction is used to instruct the second connection end of the switch to connect the first low-speed optical receiving component 3400 in the time division mode (that is, the second connection end is connected to the A end in the figure). The first low-speed optical receiving component 3400 detects the first low-speed signal and outputs the analog electrical signal to the electrical chip through the switch. The electrical chip implements amplification, judgment and other processing of the analog electrical signal, and outputs the judgment information obtained by the processing to the MAC chip through pin 1 and pin 2.

[0109] With the evolution of PON, all EPON ONTs connected to optical module 3000 are replaced with higher-speed ONTs, and the upstream optical signal can be switched to wavelength division mode. At this time, the upstream optical signal includes the high-speed signal of wavelength division multiplexing and the second low-speed signal. In this case, the MAC chip can issue instructions to the control unit in the optical module through the I2C channel, and the second connection end of the instruction is used to indicate that the switch is connected to the second low-speed optical receiving component 3500 (i.e., the second connection end is connected to the B end in the figure) in the wavelength division mode.

[0110] Therefore, the control unit controls the second connection end (right end) of the switch to disconnect from the A end and connect to the B end according to the instruction issued by the MAC chip. Thus, the communication connection with the first low-rate optical receiving component is disconnected and the second low-rate optical receiving component is connected. After the switch is switched, the electrical chip can realize the communication connection with the second low-rate optical receiving component 3500 through the switch. The second low-rate optical receiving component 3500 detects the second low-rate signal and obtains the analog electrical signal, which is output to the electrical chip through the switch. The electrical chip realizes the amplification, judgment and other processing of the analog electrical signal, and outputs the processed level information to the MAC chip through pins 1 and 2.

[0111] In this structure, the switching from the time division mode to the wavelength division mode is realized by switching the switch. The electrical chip can process the analog electrical signal of the first low-rate signal in the time division mode, and process the analog electrical signal of the second low-rate signal in the wavelength division mode. In other words, at different stages of network evolution (i.e., time division mode and wavelength division mode), the same electrical chip is used to process analog electrical signals, which can reduce the number of electrical chips in the optical module (as well as the number of pins corresponding to the electrical chip), thereby reducing the chip layout area and complexity, and reducing costs.

[0112] Optional, in Figure 6 In the structure shown, the control unit may be a microcontroller unit (MCU).

[0113] The optical module 3000 provided in the embodiment of the present application is applied to Figure 1 The PON shown is the PON provided by the embodiment of the present application. Figure 5 or Figure 6 The OLT shown is used for Figure 1 The PON shown is also the PON provided by the embodiment of the present application.

[0114] During the evolution of PON, if the EPON FP ONTs that communicate with the optical module are replaced with higher-speed ONTs or non-FP ONTs, the upstream optical signal will switch from time division mode to wavelength division mode. Figure 5 and Figure 6 The OLT structure shown can realize corresponding switching from the time division mode to the wavelength division mode in terms of the processing signal of the MAC chip or the signal output by the optical module 3000.

[0115] It is worth noting that if in some special scenarios, the uplink optical signal needs to be switched from wavelength division mode to time division mode, this can also be done through Figure 5 or Figure 6 The structure shown is implemented, and the specific process is shown in Figure 5 and Figure 6 The description is not repeated here.

[0116] The present application also provides a signal processing method, which can be applied to the OLT provided in the present application, for example Figure 5 or Figure 6 The OLT shown in Figure 1 is Figure 7 As shown, the method includes:

[0117] 701. Acquire first detection information of an uplink optical signal in a time division mode, where the first detection information includes a detection result of the optical module 3000 on a high-rate signal and a first low-rate signal.

[0118] In the time division mode, the uplink optical signal includes a high-rate optical signal and a first low-rate optical signal. The OLT can obtain the detection result of the optical module 3000 on the high-rate signal and the first low-rate signal to obtain the first detection information of the uplink optical signal in the time division mode.

[0119] 702. Acquire second detection information of the uplink optical signal in the wavelength division mode, where the second detection information includes a detection result of the optical module 3000 on the high-rate signal and the second low-rate signal.

[0120] In the wavelength division mode, the uplink optical signal includes a high-rate optical signal and a second low-rate optical signal. The OLT can obtain the detection result of the optical module 3000 on the high-rate signal and the second low-rate signal to obtain the second detection information of the uplink optical signal in the wavelength division mode.

[0121] If this method is applied in Figure 5 In the OLT structure shown, in step 701 (in time division mode), the MAC chip obtains first detection information based on information from the first pin 3700 and the third pin; in step 702 (in wavelength division mode), the MAC chip obtains second detection information based on information from the second pin 3900 and the third pin.

[0122] If this method is applied in Figure 6 In the OLT structure shown, in step 701 (in time division mode), according to the instruction issued by the MAC chip, the second connection end (right end) of the switch is connected to the A end, so that the electrical chip processes the analog electrical signal of the first low-rate signal. After step 701, the control unit controls the second connection end to disconnect the communication connection with the first low-rate optical receiving component 3400 and connect the second low-rate optical receiving component 3500 according to the instruction issued by the MAC chip. In step 702 (in wavelength division mode), according to the instruction issued by the MAC chip, the second connection end (right end) of the switch is connected to the B end, so that the electrical chip processes the analog electrical signal of the second low-rate signal.

[0123] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0124] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0125] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0126] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0127] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

Claims

1. An optical module, characterized in that: include: An optical splitting unit is used to split an uplink optical signal into a first optical signal and a second optical signal, wherein the first optical signal and the second optical signal carry the same information, wherein the uplink optical signal includes a first low-rate signal and a high-rate signal with conflicting wavelengths in a time division mode, and includes a second low-rate signal and the high-rate signal with non-conflicting wavelengths in a wavelength division mode; a first low-rate optical receiving component, configured to detect the first low-rate signal in the first optical signal in the time-division mode; A wavelength division unit, used for separating the high-rate signal and the low-rate signal from the second optical signal, wherein the high-rate signal is transmitted to the high-rate optical receiving component, and the low-rate signal is transmitted to the second low-rate optical receiving component. In the wavelength division mode, the low-rate signal is the second low-rate signal; The second low-rate optical receiving component is used to detect the second low-rate signal in the wavelength division mode; The high-rate optical receiving component is used to detect the high-rate signal in the time division mode and the wavelength division mode.

2. The optical module according to claim 1, characterized in that: In the time division mode, the first low-rate signal includes an EPON signal, and the high-rate signal includes at least one of a 50G PON signal, a 25G EPON signal, and a 25GS-PON signal.

3. The optical module according to claim 2, characterized in that: In the time division mode, the first low-rate signal also includes a 10G EPON signal time-division multiplexed with the EPON signal.

4. The optical module according to any one of claims 1 to 3, characterized in that In the wavelength division mode, the second low-rate signal includes a 10G EPON signal, and the high-rate signal includes at least one of a 50G PON signal, a 25G EPON signal, and a 25GS-PON signal.

5. The optical module according to any one of claims 1 to 4, characterized in that: The optical module further includes: a first electrical chip, a first pin, a second electrical chip and a second pin, wherein the first pin and the second pin are both used to connect to a media access control MAC chip; The first low-rate optical receiving component is specifically used to detect a signal of a first rate and a signal of a second rate in the first low-rate signal to obtain a first electrical signal and a second electrical signal; The first electrical chip is used to process the first electrical signal and the second electrical signal, multiplex the two processed signals, and output the multiplexed signal to the MAC chip through the first pin; The second low-rate optical receiving component is specifically used to detect the third-rate signal and the fourth-rate signal in the second low-rate signal to obtain the third electrical signal and the fourth electrical signal; The second electrical chip is used to process the third electrical signal and the fourth electrical signal, multiplex the two processed signals, and output the multiplexed signal to the MAC chip through the second pin.

6. The optical module according to any one of claims 1 to 4, characterized in that: The optical module also includes a switch and a control unit; The first connection end and the second connection end of the switch are connected to each other, the first connection end is used to communicate with the media access control MAC chip, and the second connection end is used to connect the first low-rate optical receiving component or the second low-rate optical receiving component; The control unit is used to control the second connection end to connect to the first low-rate optical receiving component in the time division mode and to connect to the second low-rate optical receiving component in the wavelength division mode according to the instruction of the MAC chip.

7. The optical module according to any one of claims 1 to 6, characterized in that: The light splitting unit includes any one of a light splitter, a prism and a splitter.

8. The optical module according to any one of claims 1 to 7, characterized in that: The light splitting unit is specifically used for: The uplink optical signal is divided into the first optical signal and the second optical signal according to a set power ratio.

9. An optical line terminal OLT, characterized in that: A method comprising a media access control (MAC) chip and an optical module according to any one of claims 1 to 4 or 7 to 8, wherein the MAC chip is used to communicate with the optical module; The MAC chip is used for: Acquire first detection information of the uplink optical signal in the time division mode, where the first detection information includes a detection result of the optical module on the high-rate signal and the first low-rate signal; Second detection information of the uplink optical signal is acquired in the wavelength division mode, where the second detection information includes a detection result of the optical module on the high-rate signal and the second low-rate signal.

10. The OLT according to claim 9, characterized in that: The optical module further includes a first pin, a second pin and a third pin, and the first pin, the second pin and the third pin are all connected to the MAC chip; The first pin is used to communicate with the first low-rate optical receiving component, the second pin is used to communicate with the second low-rate optical receiving component, and the third pin is used to communicate with the high-rate optical receiving component; The acquiring the first detection information of the uplink optical signal in the time division mode includes: The MAC chip obtains the first detection information according to the information from the first pin and the third pin in the time division mode; The acquiring the second detection information of the uplink optical signal in the wavelength division mode includes: The MAC chip obtains the second detection information according to the information from the second pin and the third pin in the wavelength division mode.

11. The OLT according to claim 10, characterized in that: The first low-rate signal includes a signal of a first rate and a signal of a second rate, the second low-rate signal includes a signal of a third rate and a signal of a fourth rate, and the optical module further includes: a first electrical chip communicatively connected to the first low-rate optical receiving component, configured to process a first electrical signal and a second electrical signal, and multiplex the two processing results obtained by the processing, and output the multiplexed processing result to the MAC chip through the first pin, wherein the first electrical signal and the second electrical signal are detection results of the first low-rate optical receiving component for the signal of the first rate and the signal of the second rate; The second electrical chip communicatively connected to the second low-rate optical receiving component is used to process the third electrical signal and the fourth electrical signal, and multiplex the two processing results obtained by the processing, and output the multiplexed processing result to the MAC chip through the second pin, and the third electrical signal and the fourth electrical signal are the detection results of the second low-rate optical receiving component for the signal of the third rate and the signal of the fourth rate.

12. The OLT according to claim 11, characterized in that: The MAC chip is also used for: Controlling the first electrical chip to operate in the time division mode and to be turned off in the wavelength division mode; The second electrical chip is controlled to operate in the wavelength division mode and to be turned off in the time division mode.

13. The OLT according to claim 9, characterized in that: The optical module also includes a switch and a control unit; The first connection end and the second connection end of the switch are connected to each other, the first connection end is used to communicate with the MAC chip, and the second connection end is used to connect the first low-rate optical receiving component or the second low-rate optical receiving component; The control unit is used to control the second connection end to connect to the first low-rate optical receiving component in the time division mode and to connect to the second low-rate optical receiving component in the wavelength division mode according to the instruction of the MAC chip.

14. A signal processing method, characterized in that: The method is applied to an OLT, wherein the OLT comprises a media access control MAC chip and an optical module according to any one of claims 1 to 4 or 7 to 8; The method comprises: Acquire first detection information of the uplink optical signal in the time division mode, where the first detection information includes a detection result of the optical module on the high-rate signal and the first low-rate signal; Second detection information of the uplink optical signal is acquired in the wavelength division mode, where the second detection information includes a detection result of the optical module on the high-rate signal and the second low-rate signal.

15. The method according to claim 14, characterized in that The optical module further includes a first pin, a second pin and a third pin, and the first pin, the second pin and the third pin are all connected to the MAC chip; The first pin is used to communicate with the first low-rate optical receiving component, the second pin is used to communicate with the second low-rate optical receiving component, and the third pin is used to communicate with the high-rate optical receiving component; The acquiring the first detection information of the uplink optical signal in the time division mode includes: The MAC chip obtains the first detection information according to the information from the first pin and the third pin in the time division mode; The acquiring the second detection information of the uplink optical signal in the wavelength division mode includes: The MAC chip obtains the second detection information according to the information from the second pin and the third pin in the wavelength division mode.

16. The method according to claim 15, characterized in that The first low-rate signal includes a signal of a first rate and a signal of a second rate, the second low-rate signal includes a signal of a third rate and a signal of a fourth rate, and the optical module further includes: a first electrical chip communicatively connected to the first low-rate optical receiving component, configured to process a first electrical signal and a second electrical signal, and multiplex the two processing results obtained by the processing, and output the multiplexed processing result to the MAC chip through the first pin, wherein the first electrical signal and the second electrical signal are detection results of the first low-rate optical receiving component for the signal of the first rate and the signal of the second rate; The second electrical chip communicatively connected to the second low-rate optical receiving component is used to process the third electrical signal and the fourth electrical signal, and multiplex the two processing results obtained by the processing, and output the multiplexed processing result to the MAC chip through the second pin, and the third electrical signal and the fourth electrical signal are the detection results of the second low-rate optical receiving component for the signal of the third rate and the signal of the fourth rate.

17. The method according to claim 16, characterized in that The method further comprises: Controlling the first electrical chip to operate in the time division mode and to be turned off in the wavelength division mode; The second electrical chip is controlled to operate in the wavelength division mode and to be turned off in the time division mode.

18. The method according to claim 14, characterized in that The optical module also includes a switch and a control unit; The first connection end and the second connection end of the switch are connected to each other, the first connection end is used to communicate with the MAC chip, and the second connection end is used to connect the first low-rate optical receiving component or the second low-rate optical receiving component; The method further comprises: An instruction is issued to the control unit, wherein the instruction is used to instruct the control unit to control the second connection end to connect to the first low-speed optical receiving component in the time division mode and to connect to the second low-speed optical receiving component in the wavelength division mode.

19. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program, and when a computer executes the program, the method according to any one of claims 14 to 18 is executed.

20. A computer program product, characterized in that When the computer program product is executed on a computer, the computer performs the method according to any one of claims 14 to 18.

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