Optical module and optical line terminal
By separating high-rate and low-rate signals in the optical module and detecting them separately, the problem that the optical detector chip is not compatible with low-rate and high-rate signals is solved, improving system performance and reducing costs.
Patent Information
- Application Number
- CN202310803863.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-30
- Publication Date
- 2024-12-31
AI Technical Summary
In the field of optical communication, existing optical modules cannot be effectively compatible with the detection of low-rate and high-rate signals, resulting in negative correlation between the bandwidth and gain of the optical detector chip, which cannot meet the bit error rate requirements of low-rate signals, resulting in signal noise ratio drops and performance drops.
By introducing a first spectroscopic unit into the optical module, the uplink optical signal is divided into two beams of signals, high-rate signal and low-rate signal, and transmitted to the high-rate optical receiving component and the low-rate optical receiving component respectively, and matched with different optical receiving components The requirements for different speed signals realize the partial rate detection of high-rate and low-rate signals.
Improves the performance of low-rate signals, reduces the performance cost of optical receiving components, improves system performance, and reduces the cost of PON evolution.
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Figure CN119233129A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of optical communications, and in particular, to an optical module and an optical line terminal. Background Art
[0002] Currently, the commonly used passive optical network (PON) types include EPON, 10GEPON, GPON, XGS-PON, etc. With the development of PON, the requirements for transmission rate are getting higher and higher. The high-speed 50G PON will become the common choice for the next generation of PON after EPON / 10G EPON, GPON / XGS-PON. The low-speed communication equipment in the existing PON (such as low-speed optical network terminals (ONT) such as EPON and GPON) will gradually be replaced by high-speed communication equipment.
[0003] However, due to the large number of ONT nodes in PON, it is impossible to complete the replacement of all ONTs from low-rate to high-rate in a short time. Therefore, for some optical line terminals (OLT), it is necessary to communicate with low-rate ONTs that have not completed the replacement and upgrade, and also with high-rate ONTs that have completed the replacement and upgrade. The upstream wavelengths of some low-rate signals and high-rate signals conflict (for example, most EPON terminal upstream signals and 50G PON upstream signals). Therefore, in the process of evolving to high-rate PON, the low-rate signals and high-rate signals in the upstream optical signals are time-division multiplexed, and the optical detector chip in the OLT needs to be compatible with the detection of low-rate signals and high-rate signals.
[0004] There is a negative correlation between the bandwidth and gain of the photodetector chip. The photodetector chip that is compatible with both high-rate and low-rate signals has a lower gain because it needs to support the detection of high-rate signals with a large bandwidth. For low-rate signals, the low gain of the chip leads to a decrease in the signal-to-noise ratio and an increase in the bit error rate, which cannot meet the bit error rate requirements of low-rate signals, resulting in a decrease in the performance of low-rate signals. Summary of the invention
[0005] The embodiments of the present application provide an optical module and an optical line terminal for improving the performance of low-rate signals under multi-generation PON time division multiplexing.
[0006] In the first aspect, an embodiment of the present application provides an optical module. The optical module includes a first optical splitter unit, a high-rate optical receiving component and a low-rate optical receiving component. Among them, the first optical splitter unit is used to split the uplink optical signal into a first optical signal and a second optical signal. The first optical signal is transmitted to the high-rate optical receiving component, and the second optical signal is transmitted to the low-rate optical receiving component. The first optical signal and the second optical signal carry the same information, which includes a low-rate signal and a high-rate signal, and the rate of the high-rate signal is higher than the rate of the low-rate signal. The high-rate optical receiving component is used to detect the high-rate signal in the first optical signal. The low-rate optical receiving component is used to detect the low-rate signal in the second optical signal.
[0007] In an embodiment of the present application, the first optical splitter unit divides the uplink optical signal into two signals (a first optical signal and a second optical signal) that carry the same information. The two optical signals are transmitted to a high-rate optical receiving component and a low-rate optical receiving component, respectively. Thus, the detection of high-rate signals and low-rate signals is achieved through different optical receiving components. The optical detector chip in the high-rate optical receiving component can meet the bandwidth requirements of the high-rate optical signal, and the optical detector chip in the low-rate optical receiving component can meet the gain requirements of the low-rate optical signal. Compared with the traditional optical module structure, the structure in which a plurality of time-division multiplexed signals (high-rate signals and low-rate signals) are detected by one optical receiving component; the optical signal rate detection is realized, and different optical detector chips can be used to match the chip requirements of different rate signals, thereby reducing the performance cost of the signal detected by the optical receiving component and improving the system performance.
[0008] In an optional implementation, the low-rate signal includes a first low-rate signal and a second low-rate signal that are time-division multiplexed. The low-rate optical receiving component is specifically used to detect the first low-rate signal and the second low-rate signal.
[0009] In an optional implementation, the first low-rate signal includes an EPON signal, and the second low-rate signal includes a 10G EPON signal.
[0010] In the embodiment of the present application, the low-rate optical receiving component can use the mature and commonly used EPON & 10GEPON optical receiving component in the existing network. The component has mature technology, low cost, and can match the existing network, thus reducing the cost of PON evolution.
[0011] In an optional implementation, the first light splitting unit includes any one of a light splitter, a prism and a splitter.
[0012] In an optional implementation manner, the first 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.
[0013] Optionally, the set power ratio can be 1:1, 6:4, 4:6, 7:3, etc., which is not limited in this application.
[0014] In an optional implementation, the optical module further includes a control unit. The control unit is used to obtain a set power ratio and output the set power ratio to the first optical splitting unit, where the set power ratio is determined according to changes in the network in which the optical module is located. The first optical splitting unit is used to adjust the splitting ratio of the first optical splitting unit according to the set power ratio, and split the uplink optical signal into the first optical signal and the second optical signal according to the set power ratio.
[0015] In an embodiment of the present application, the first splitting unit can adaptively adjust the splitting ratio according to changes in the network in which the optical module is located, thereby adjusting the power of the optical signal entering the high-speed optical receiving component and the low-speed optical receiving component, so that the intensity of the optical signal entering the high-speed optical receiving component and the low-speed optical receiving component can change based on changes in the network, thereby improving the detection efficiency of each optical receiving component for the signal.
[0016] In an optional implementation, the high-rate signal includes at least one of a 50G PON signal, a 25G EPON signal, and a 25GS-PON signal.
[0017] In an optional implementation, the high-rate optical receiving component includes a second optical splitter, a first high-rate optical receiving component and a second high-rate optical receiving component. The second optical splitter is used to split the first optical signal into a third optical signal and a fourth optical signal. The third optical signal is output to the first high-rate optical receiving component, and the fourth optical signal is output to the second high-rate optical receiving component. The third optical signal and the fourth optical signal carry the same information, which includes the first high-rate signal and the second high-rate signal. The rate of the first high-rate signal is higher than the rate of the second high-rate signal. The first high-rate optical receiving component is used to detect the first high-rate signal in the third optical signal. The second high-rate optical receiving component is used to detect the second high-rate signal in the fourth optical signal.
[0018] In an embodiment of the present application, the second optical splitter unit divides the first optical signal into two signals (a third optical signal and a fourth optical signal) carrying the same information. The two optical signals are respectively transmitted to the first high-speed optical receiving component and the second high-speed optical receiving component. Thus, the detection of the first high-speed signal and the second high-speed signal is achieved through different optical receiving components. The optical detector chip in the first high-speed optical receiving component meets the performance requirements of the first high-speed signal, and the optical detector chip in the second high-speed optical receiving component meets the performance requirements of the second high-speed signal. This structure realizes the detection of high-speed signals at different rates, and different optical detector chips can be used to match the requirements of different rate signals for chips, thereby reducing the performance cost of the signal detected by the optical receiving component and improving system performance.
[0019] In a second aspect, an embodiment of the present application provides an optical line terminal. The optical line terminal includes a media access control MAC chip and the optical module described in the first aspect. The chip is used to communicate with the optical module.
[0020] The beneficial effects of the second aspect refer to the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A schematic diagram of the architecture of the passive optical network PON provided in this application;
[0022] Figure 2 Schematic diagram of wavelength ranges of PON signals of different rates provided in this application;
[0023] Figure 3 A schematic diagram of the structure of an optical module provided in an embodiment of the present application;
[0024] Figure 4 Another schematic diagram of the structure of the optical module provided in the embodiment of the present application;
[0025] Figure 5 A schematic diagram of the structure of an optical module with an adjustable splitting ratio of a first splitting unit provided in an embodiment of the present application;
[0026] Figure 6 A schematic diagram of the structure of an optical module for rate-splitting and detecting high-rate signals provided in an embodiment of the present application. DETAILED DESCRIPTION
[0027] 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.
[0028] 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.
[0029] 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 (e.g. 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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 EPON, 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.
[0034] Different users have different requirements for bandwidth access rates, and some users are not in urgent need of bandwidth upgrades. Therefore, the replacement of low-rate ONTs with high-rate ONTs in PON will take a long time. In other words, OLT will communicate with both low-rate ONTs and high-rate ONTs for a long time.
[0035] For example Figure 1 The optical module 1 in FIG. 1 is used to communicate with ONT 1, ONT 2, and ONT 3. For example, ONT 1 may be an EPO ONT, ONT 2 may be a 50G PON ONT, and ONT 3 may be a 10G EPON ONT. Then the optical module 1 needs to support the transmission and reception of EPON signals, 10G EPON signals, and 50G PON signals.
[0036] Figure 2 Figure 1 is a schematic diagram of the wavelength range of PON signals at different rates. In the existing network, most 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 50G PON conflict with each other.
[0037] As mentioned above, during the evolution of PON, the optical module needs to be compatible with the communication with 50G PON ONT and EPON ONT. Since the wavelengths of 50G PON signals and EPON signals conflict with each other, in the process of evolving to high-speed PON, the low-speed signal (EPON signal) and the high-speed signal (50G PON signal) in the upstream optical signal are time-division multiplexed. The optical module detects the upstream optical signal through the optical detector chip in the optical receiving component, so the optical detector chip needs to be compatible with the detection of low-speed signals and high-speed signals.
[0038] There is a negative correlation between the bandwidth and gain of the optical detector chip. The optical detector chip that is compatible with high-speed and low-speed signals usually requires a larger bandwidth because it needs 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 the optical detection chip that only receives low-speed signals, the signal-to-noise ratio of the low-speed signal decreases and the bit error rate increases. For example, in actual applications, an optical detector chip that is compatible with 50G PON and EPON signals will cause a 4-5dB performance degradation for EPON signals.
[0039] In order to solve the above problems, the embodiments of the present application propose an optical module and an optical line terminal OLT. The optical module provided in the embodiments of the present application detects high-rate signals and low-rate signals respectively through different optical receiving components, so that the optical receiving component of the low-rate signal can use a higher-gain optical detector, thereby avoiding the decrease of the signal-to-noise ratio and improving the performance of the low-rate signal.
[0040] like Figure 3 As shown, the optical module 3000 provided in the embodiment of the present application includes: a first light splitting unit 3100 , a high-rate optical receiving component 3200 and a low-rate optical receiving component 3300 .
[0041] The first 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. The information includes a low-rate signal and a high-rate signal, and the rate of the high-rate signal is higher than the rate of the low-rate signal.
[0042] Optionally, the first light splitting unit 3100 may be a light splitter, a prism or a splitter, which is not limited in the present application.
[0043] Optionally, the set power ratio can be 1:1, 6:4, 4:6, 7:3, etc., which is not limited in this application.
[0044] Optionally, the low-rate signal may include at least one of an EPON signal and a 10G EPON signal, which is not limited in the present application. In an optional implementation, the low-rate signal may be a time-division multiplexed EPON signal and a 10G EPON signal.
[0045] Optionally, the high-rate signal may include a 50G PON signal, a 25G EPON signal, a 25GS-PON signal, etc., which is not limited in this application.
[0046] The first optical signal separated from the first optical splitter 3100 is transmitted to the high-speed optical receiving component 3200 . The second optical signal separated from the first optical splitter 3100 is transmitted to the low-speed optical receiving component 3300 .
[0047] The high-rate optical receiving component 3200 is used to detect the high-rate signal in the first optical signal. The low-rate optical receiving component 3300 is used to detect the low-rate signal in the second optical signal.
[0048] The high-rate receiver optical subassembly (ROSA) 3200 is also referred to as a high-rate ROSA 3200. Optionally, the high-rate ROSA 3200 may include an avalanche photo diode (APD), a trans-impedance amplifier (TIA), etc., which is not limited in the present application.
[0049] The low-rate optical receiving assembly 3300 is also referred to as a low-rate ROSA 3300. As above, the low-rate ROSA 3300 may include an avalanche photo diode (APD), a transimpedance amplifier, etc., which is not limited in the present application.
[0050] In an embodiment of the present application, the first 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-rate optical receiving component 3200 and the low-rate optical receiving component 3300, respectively. Thus, the detection of high-rate signals and low-rate signals is achieved through different optical receiving components. The optical detector chip in the high-rate optical receiving component 3200 can meet the bandwidth requirements of the high-rate optical signal, and the optical detector chip in the low-rate optical receiving component 3300 can meet the gain requirements of the low-rate optical signal. Compared with the traditional optical module structure, the structure in which a plurality of time-division multiplexed signals (high-rate signals and low-rate signals) are detected by one optical receiving component; the optical signal rate detection is realized, and different optical detector chips can be used to match the requirements of different rate signals for chips, thereby reducing the performance cost of the signal detected by the optical receiving component and improving the system performance.
[0051] In an optional implementation, the high-rate signal is a 50G PON signal, and the low-rate signal is a time-division multiplexed EPON signal and a 10G EPON signal. 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 3200, and the bit error rate requirement of the EPON signal and the 10G EPON signal can be met by the high-gain optical detector chip in the low-rate optical receiving component 3300, thereby improving system performance.
[0052] In this case, the low-rate optical receiving component 3300 can use the mature and commonly used EPON & 10GEPON optical receiving component in the existing network. The component has mature technology, low cost, and can match the existing network, thus reducing the cost of PON evolution.
[0053] In an optional implementation, the high-rate signal in the uplink optical signal includes a UW1 signal of a 50G PON, and the low-rate signal includes a 10G EPON signal (it is not excluded that the low-rate signal also includes an EPON signal, etc.). Figure 2 As shown in the wavelength distribution, the wavelength of the UW1 signal conflicts with that of the 10G EPON signal, and the UW1 signal and the 10G EPON signal are time-division multiplexed in the upstream optical signal. Therefore, the detection of the upstream optical signal can also be achieved by the optical module 3000 provided in the embodiment of the present application. Specifically, the large bandwidth requirement of the UW1 signal is met by the large-bandwidth optical detector chip in the high-speed optical receiving component 3200, and the bit error rate requirement of the 10G EPON signal is met by the high-gain optical detector chip in the low-speed optical receiving component 3300, thereby improving the system performance.
[0054] Optionally, if the high-speed signal in the uplink optical signal includes a UW2 signal of a 50G PON, the low-speed signal includes an EPON signal (which may be a non-FP EPON signal and / or an FP EPON signal, and it is not excluded that the low-speed signal also includes a 10G EPON signal, etc.). Since the wavelengths of the UW2 signal and the EPON signal conflict, the UW2 signal and the EPON signal are time-division multiplexed in the uplink optical signal. Therefore, the detection of the uplink optical signal can also be achieved by the optical module 3000 provided in the embodiment of the present application, and different requirements of the UW2 signal and the EPON signal can be met respectively by different optical receiving components.
[0055] 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.
[0056] Will Figure 3 The optical module 3000 shown is used in Figure 1 The optical line terminal OLT shown in FIG. 1 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. For example, if the high-rate signal includes a 50G PON signal and the low-rate signal includes a time-division multiplexed EPON signal and a 10G EPON signal, the corresponding OLT structure is as follows: Figure 4 shown.
[0057] In this structure, the high-speed optical receiving component 3200 in the optical module 3000 is a 50G optical receiving component with an operating wavelength (ie, filtering range) of 1284-1288nm; the low-speed optical receiving component 3300 is a 1.25G&10G optical receiving component with an operating wavelength of 1260-1360nm.
[0058] like Figure 4 As shown, the first optical splitter unit 3100 may be an optical splitter 3110. A wave plate may be further included between the optical splitter 3110 and the high-speed optical receiving component 3200. The wave plate is used to separate the 50G signal (high-speed signal) from the first optical signal, and the 50G signal is transmitted to the high-speed optical receiving component 3200.
[0059] The low-rate optical receiving component 3300 is specifically used to detect the EPON signal and the 10G EPON signal in the low-rate signal to obtain the 1.25G analog electrical signal and the 10G analog electrical signal. After the electrical power is split, the 1.25G analog electrical signal and the 10G analog electrical signal are respectively input into the 1.25G limiting amplifier (LA) and the 10G LA for amplification, judgment and other processing to obtain the 1.25G judgment signal and the 10G judgment signal. The 1.25G judgment signal and the 10G judgment signal are output to the MAC chip through the pins.
[0060] The uplink rate of 50G PON includes different route rates such as 25G and 50G. In one example, the high-rate signal in the uplink optical signal is a 50G PON signal at a rate of 50G. The high-rate optical receiving component 3200 is specifically used to detect the 50G signal (optical signal) and obtain a 50G analog electrical signal. The 50G analog electrical signal is input to the LA for amplification, judgment and other processing to obtain a 50G judgment signal. The 50G judgment signal is output to the MAC chip through the pin. If the high-rate signal is a 50G signal at a rate of 25G, the corresponding optical signal, analog electrical signal and judgment signal have a rate of 25G, which is not limited in this application.
[0061] It is worth noting that Figure 5 The specific rates of the high-rate signal and the low-rate signal shown are only examples, and the rates of the above two signals are not limited to the specific rates mentioned in the above examples.
[0062] Optionally, in addition to LA, the analog electrical signals output by the high-speed optical receiving component 3200 and the low-speed optical receiving component 3300 may also be processed by other types of amplifiers, such as digital signal processing (DSP) chips, etc., which is not limited in the present application.
[0063] Optionally, the optical module 3000 may also include 1490 / 1577 dual-transmit TO, 1342TO, etc., to achieve the transmission of corresponding rate signals.
[0064] Optionally, if the network where the optical module 3000 is located changes, the first optical splitting unit 3100 can also adjust the splitting ratio according to the network change. Figure 5 As shown, the optical module 3000 further includes a control unit 3400 .
[0065] The control unit 3400 is used to obtain a set power ratio and output the set power ratio to the first optical splitting unit 3100. The set power ratio is determined according to changes in the network in which the optical module 3000 is located. For example, the MAC chip that communicates with the optical module 3000 can obtain changes in the network in which the optical module 3000 is located. When the proportion of low-rate signals to high-rate signals in the network changes, the MAC chip can obtain the corresponding set power ratio according to the change in the proportion, and output the set power ratio to the control unit 3400.
[0066] The first optical splitting unit 3100 is used to adjust the splitting ratio of the first optical splitting unit 3100 according to the set power ratio, and split the uplink optical signal into the first optical signal and the second optical signal according to the set power ratio.
[0067] In an embodiment of the present application, the first splitting unit 3100 can adaptively adjust the splitting ratio according to changes in the network in which the optical module 3000 is located, thereby adjusting the power of the optical signal entering the high-speed optical receiving component 3200 and the low-speed optical receiving component 3300, so that the intensity of the optical signal entering the high-speed optical receiving component 3200 and the low-speed optical receiving component 3300 can change based on changes in the network, thereby improving the detection efficiency of each optical receiving component for the signal.
[0068] Optional, in Figure 5 In the structure shown, the control unit can be a microcontroller MCU.
[0069] Optionally, if the high-rate signal includes a first high-rate signal and a second high-rate signal that are time-division multiplexed, the first optical signal can be split again, and the first high-rate signal and the second high-rate signal can be detected by different optical receiving components to improve the performance of the first high-rate signal and the second high-rate signal.
[0070] like Figure 6 As shown, in this structure, the high-rate optical receiving component 3200 includes a second optical splitting unit 3210 , a first high-rate optical receiving component 3220 and a second high-rate optical receiving component 3230 .
[0071] The second optical splitter unit 3210 is used to split the first optical signal into a third optical signal and a fourth optical signal, and output the third optical signal to the first high-speed optical receiving component 3220, and output the fourth optical signal to the second high-speed optical receiving component 3230. The third optical signal and the fourth optical signal carry the same information, which includes the first high-speed signal and the second high-speed signal. The rate of the first high-speed signal is higher than the rate of the second high-speed signal.
[0072] The first high-rate optical receiving component 3220 is used to detect the first high-rate signal in the third optical signal.
[0073] The second high-rate optical receiving component 3230 is used to detect the second high-rate signal in the fourth optical signal.
[0074] In the embodiment of the present application, the second optical splitter unit 3210 divides the first optical signal into two beams of signals (third optical signal and fourth optical signal) carrying the same information. The two optical signals are transmitted to the first high-speed optical receiving component 3220 and the second high-speed optical receiving component 3230 respectively. Thus, the detection of the first high-speed signal and the second high-speed signal is achieved through different optical receiving components. The optical detector chip in the first high-speed optical receiving component 3220 meets the performance requirements of the first high-speed signal, and the optical detector chip in the second high-speed optical receiving component 3230 meets the performance requirements of the second high-speed signal. This structure realizes the detection of high-speed signals at different rates, and different optical detector chips can be used to match the requirements of different rate signals for chips, thereby reducing the performance cost of the signal detected by the optical receiving component and improving system performance.
[0075] 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.
[0076] 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.
[0077] 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.
[0078] 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.
[0079] 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: A first light splitting unit, a high-rate light receiving component and a low-rate light receiving component; The first optical splitting unit is used to split the uplink optical signal into a first optical signal and a second optical signal, the first optical signal is transmitted to the high-rate optical receiving component, and the second optical signal is transmitted to the low-rate optical receiving component, the first optical signal and the second optical signal carry the same information, the information includes a low-rate signal and a high-rate signal, and the rate of the high-rate signal is higher than the rate of the low-rate signal; The high-rate optical receiving component is used to detect the high-rate signal in the first optical signal; The low-rate optical receiving component is used to detect the low-rate signal in the second optical signal.
2. The optical module according to claim 1, characterized in that: The low-rate signal includes a first low-rate signal and a second low-rate signal that are time-division multiplexed, and the low-rate optical receiving component is specifically used to detect the first low-rate signal and the second low-rate signal.
3. The optical module according to claim 2, characterized in that: The first low-rate signal includes an EPON signal, and the second low-rate signal includes a 10G EPON signal.
4. The optical module according to any one of claims 1 to 3, characterized in that: The first light splitting unit includes any one of a light splitter, a prism and a splitter.
5. The optical module according to any one of claims 1 to 4, characterized in that: The first 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.
6. The optical module according to claim 5, characterized in that: The optical module also includes a control unit; The control unit is used to obtain the set power ratio and output the set power ratio to the first optical splitting unit, wherein the set power ratio is determined according to changes in the network in which the optical module is located; The first optical splitting unit is used to adjust the splitting ratio of the first optical splitting unit according to the set power ratio, and split the uplink optical signal into the first optical signal and the second optical signal according to the set power ratio.
7. The optical module according to any one of claims 1 to 6, characterized in that: The high-rate signal includes at least one of a 50GPON signal, a 25G EPON signal and a 25GS-PON signal.
8. The optical module according to any one of claims 1 to 7, characterized in that: The high-rate optical receiving component includes a second optical splitting unit, a first high-rate optical receiving component and a second high-rate optical receiving component; The second optical splitting unit is used to split the first optical signal into a third optical signal and a fourth optical signal, the third optical signal is transmitted to the first high-rate optical receiving component, and the fourth optical signal is transmitted to the second high-rate optical receiving component, the third optical signal and the fourth optical signal carry the same information, the information includes the first high-rate signal and the second high-rate signal, and the rate of the first high-rate signal is higher than the rate of the second high-rate signal; The first high-rate optical receiving component is used to detect the first high-rate signal in the third optical signal; The second high-rate optical receiving component is used to detect the second high-rate signal in the fourth optical signal.
9. An optical line terminal, characterized in that: It comprises a media access control MAC chip and the optical module according to any one of claims 1 to 8, wherein the MAC chip is used to communicate with the optical module.