Optical transmitting assembly and related apparatus
Patent Information
- Application Number
- PCT/CN2026/090088
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-04-15
- Filing Date
- 2026-04-13
- Publication Date
- 2026-10-22
Smart Images
Figure CN2026090088_22102026_PF_FP_ABST
Abstract
Description
A light emitting component and related device
[0001] This application claims priority to Chinese Patent Application No. CN202510472247.1, filed on April 15, 2025, entitled "A Light Emitting Component and Related Device", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of optical communication technology, and in particular to an optical emitting component and related devices. Background Technology
[0003] With the development of communication technology, traditional pluggable optical module technology can hardly support high computing power requirements. Therefore, co-packaged optics (CPO) technology has been introduced. In CPO technology, optical chips and electrical chips are placed in the same package to shorten the distance of optoelectronic interconnection and electrical connection, and reduce the transmission loss of electrical signals.
[0004] To meet high computing power requirements, optical emitting components using CPO technology need to increase the number of optical channels. However, as the number of optical channels in a single optical emitting component increases, the probability of channel failure also increases. Therefore, improving the reliability of optical emitting components has become an urgent problem to be solved. Summary of the Invention
[0005] This application provides an optical emitting component and related devices. The optical emitting component includes two lasers or modulators that serve as both primary and backup for each other, thereby reducing the failure probability of the optical emitting component and improving its reliability.
[0006] In a first aspect, embodiments of this application propose an optical emitting component, which includes: a first component, a second component, and a driver, wherein the first component outputs an optical signal, and the second component outputs an optical signal; a first port of the first component is grounded; a first port of the second component is grounded; a second port of the first component is connected to a first output port of the driver, and the first output port of the driver is used to drive the first component to work; a second port of the second component is connected to a second output port of the driver, and the second output port of the driver is used to drive the second component to work; the first output port and the second output port of the driver are a pair of differential output ports.
[0007] In one possible implementation, the first component is a first laser, and the second component is a second laser.
[0008] In another possible implementation, the first component is a first modulator and the second component is a second modulator.
[0009] When the first component is a first laser and the second component is a second laser, a specific connection method is as follows: the cathode of the first laser is grounded; the cathode of the second laser is grounded; the anode of the first laser is connected to the first output port of the driver; and the anode of the second laser is connected to the second output port of the driver.
[0010] Furthermore, the cathode of the first laser is connected to the cathode of the second laser; in other words, the first laser and the second laser are common cathode lasers.
[0011] In one example, the first output port outputs a positive phase signal, and the second output port outputs a negative phase signal.
[0012] In another example, the first output port outputs a negative phase signal, and the second output port outputs a positive phase signal, wherein the positive phase signal and the negative phase signal have the same amplitude and opposite phase.
[0013] In the above technical solution, the optical emitting component includes two components that act as both primary and backup, which can be a laser or a modulator. Two differential signals output from a driver drive these two components respectively. In the event of a failure in one component, the other component is driven by the differential signal, reducing the failure probability of the optical emitting component and improving its reliability. Furthermore, since the optical emitting component drives these two components through a set of differential signals from the driver, the two differential signals output by the driver can reference each other, improving the anti-interference performance of the optical emitting component.
[0014] In conjunction with the first aspect, in one possible implementation of the first aspect, the first component and the second component correspond to the same optical channel. The optical signal output by the first component corresponds to the first optical channel, and the optical signal output by the second component also corresponds to the first optical channel.
[0015] In the above implementation, if one component fails within the same optical channel, another component can take over, allowing the optical channel to continue operating and ensuring the normal operation of the optical emitting device. The first component can be a laser or a modulator, and the second component can also be a laser or a modulator.
[0016] In this embodiment, the laser refers to a directly modulated laser. The specific working principle of the modulator is as follows: the driver of the optical emitting component amplifies and / or shapes the electrical signal input to the optical emitting component and outputs it to the modulator, which modulates the input electrical signal into an optical signal.
[0017] In conjunction with the first aspect, in one possible implementation of the first aspect, the first component and the second component correspond to different optical channels. For example, the optical signal output by the first component corresponds to the first optical channel, and the optical signal output by the second component corresponds to the second optical channel, wherein the first optical channel and the second optical channel are different.
[0018] In conjunction with the first aspect, in one possible implementation of the first aspect, if the first component is in an abnormal state, the driver is used to drive the first component to not work, and the driver is used to drive the second component to work; or, if the second component is in an abnormal state, the driver is used to drive the second component to not work, and the driver is used to drive the first component to work.
[0019] Specifically, the driver is used to drive the first component to not work, and the driver is used to drive the second component to work, including: the signal at the first output port of the driver is less than a first threshold, and the signal at the second output port of the driver is greater than or equal to a second threshold.
[0020] In one example, the driver turns off the signal at the first output port and turns on the signal at the second output port.
[0021] The driver is used to drive the second component to be inactive, and the driver is used to drive the first component to be active, including: the signal at the second output port of the driver is less than a second threshold, and the signal at the first output port of the driver is greater than or equal to a first threshold.
[0022] In one example, the driver turns off the signal at the second output port, and the driver turns on the signal at the first output port.
[0023] In this embodiment, the optical emitting component can determine whether the optical channel is in an abnormal state by monitoring the bit error rate, signal-to-noise ratio, or output power of the optical channel, and thus determine whether the laser or modulator corresponding to the optical channel is in an abnormal state. Through this method, the optical emitting component can flexibly control the operating state of the first and second components.
[0024] In conjunction with the first aspect, in one possible implementation of the first aspect, the optical emitting component further includes: a first bias circuit and a second bias circuit, wherein the first bias circuit is connected to a first output port of the driver and a second port of the first component, respectively; the second bias circuit is connected to a second output port of the driver and a second port of the second component, respectively; the first bias circuit includes at least one inductor and at least one capacitor; the second bias circuit includes at least one inductor and at least one capacitor.
[0025] In the above technical solution, the bias circuit is used to apply a normal operating DC current and an AC current to the laser or modulator, and the DC current and the AC current are coupled through the bias circuit. By setting bias circuits for the first component and the second component in the optical emitting assembly respectively, the stable operation of the first component and the second component is ensured.
[0026] In conjunction with the first aspect, in one possible implementation of the first aspect, the light emitting component further includes: a first resistor and a second resistor.
[0027] In one possible implementation, the first resistor is connected to both the first port and the second port of the first component, and is connected in parallel with the first component; the second resistor is connected to both the first port and the second port of the second component, and is connected in parallel with the second component.
[0028] In another possible implementation, the first resistor is connected to the first output port of the driver and the second port of the first component, respectively, and the first resistor is connected in series with the first component; the second resistor is connected to the second output port of the driver and the second port of the second component, respectively, and the second resistor is connected in series with the second component.
[0029] For example, the first resistor and the second resistor are thin-film resistors or chip resistors.
[0030] In the above technical solution, by adding resistors to the first and second components, the impedance difference between the first and second components and the driver is reduced, thereby reducing reflection in the transmission link and improving transmission power.
[0031] In conjunction with the first aspect, in one possible implementation of the first aspect, the first component, the second component, and the driver are on the same substrate; the first component and the driver are connected by flip-chip or wire bonding; the second component and the driver are connected by flip-chip or wire bonding.
[0032] In the above technical solution, the first component, the second component, and the driver can be connected in various ways, which improves the flexibility of the solution implementation.
[0033] Secondly, embodiments of this application propose an optical module, which includes an optical fiber interface and an optical transmitting component as described in any of the first aspects, wherein the optical transmitting component is connected to the optical fiber interface.
[0034] Thirdly, embodiments of this application propose a communication terminal, which includes a circuit board and an optical module as described in the second aspect, wherein the optical module is electrically connected to the circuit board.
[0035] In conjunction with the third aspect, in one implementation of the third aspect, the communication terminal is an optical line terminal or optical network unit in a fiber-to-the-room access network.
[0036] Fourthly, this application provides a method for use in an optical emitting component, the optical emitting component including a first component, a second component, and a driver, the method including: when the first component is in a normal state, the driver outputs a first signal, the first signal being used to drive the first component to work; when the first component is in an abnormal state, the driver outputs a second signal, the second signal being used to drive the second component to work, the first signal and the second signal being a set of differential signals.
[0037] In one possible implementation, the first signal is a positive phase signal and the second signal is a negative phase signal; or, the first signal is a negative phase signal and the second signal is a positive phase signal; wherein the positive phase signal and the negative phase signal have the same amplitude and opposite phases.
[0038] In one possible implementation, the method further includes: obtaining the state information of the first component, the state information of the first component including any one or more of the following: bit error rate, signal-to-noise ratio, or output optical power; determining the state of the first component based on the state information of the first component.
[0039] In one possible implementation, the first component and the second component correspond to the same optical channel.
[0040] In one possible implementation, the first component and the second component correspond to different optical channels.
[0041] In one possible implementation, the first component is a first laser, and the second component is a second laser.
[0042] In one possible implementation, the first component is a first modulator and the second component is a second modulator.
[0043] By employing the above method, in the event of a malfunction in one component of the optical transmitter assembly, the other component is driven to operate via a differential signal, reducing the probability of failure and improving the reliability of the optical transmitter assembly. Furthermore, since the optical transmitter assembly drives these two components through a set of differential signals from a driver, the two differential signals output by the driver can reference each other, enhancing the anti-interference performance of the optical transmitter assembly.
[0044] Fifthly, embodiments of this application provide a chip, which includes a processor for performing the method described in any of the embodiments of the fourth aspect.
[0045] In a sixth aspect, embodiments of this application provide a communication device, which includes a processor and an interface. The interface is used to transmit and receive signals, and the processor is used to execute the method described in any embodiment of the fourth aspect.
[0046] In a seventh aspect, embodiments of this application provide an optical module, the optical module including an optical fiber interface and an optical transmitting component performing the method described in any one of the fourth aspects, the optical transmitting component being connected to the optical fiber interface.
[0047] Eighthly, embodiments of this application provide a communication terminal, the communication terminal including a circuit board and an optical module as described in the fourth aspect, the optical module being electrically connected to the circuit board.
[0048] In conjunction with the eighth aspect, in one implementation of the eighth aspect, the communication terminal is an optical line terminal or optical network unit in a fiber-to-the-room access network.
[0049] Ninthly, this application provides a computer-readable storage medium including instructions that, when executed on a computer device, cause the computer device to perform a method performed by any of the aforementioned devices, for example, to perform a method performed by a diagnostic unit or a method performed by a communication device.
[0050] In a tenth aspect, a computer program product is provided that, when run on a computer device, causes the computer device to execute a method executed by any of the aforementioned devices, for example, executing a method executed by a diagnostic unit, or executing a method executed by a communication device. Attached Figure Description
[0051] Figures 1 to 4 are schematic diagrams of one type of optical network structure;
[0052] Figures 5 and 6 are schematic diagrams of the packaged body using CPO technology;
[0053] Figure 7 is a schematic diagram of the structure of a light emitting component 100 in an embodiment of this application;
[0054] Figure 8 is another schematic diagram of the light emitting component 100 in an embodiment of this application;
[0055] Figure 9 is another schematic diagram of the light emitting component 100 in an embodiment of this application;
[0056] Figure 10 is another schematic diagram of the light emitting component 100 in an embodiment of this application;
[0057] Figure 11 is another schematic diagram of the light emitting component 100 in an embodiment of this application;
[0058] Figure 12 is another schematic diagram of the light emitting component 100 in an embodiment of this application;
[0059] Figure 13 is another schematic diagram of the light emitting component 100 in an embodiment of this application;
[0060] Figure 14 is another schematic diagram of the light emitting component 100 in an embodiment of this application;
[0061] Figure 15 is a schematic diagram of an optical module in an embodiment of this application;
[0062] Figure 16 is a schematic diagram of an optical distribution network in an embodiment of this application;
[0063] Figure 17 is a schematic diagram of a communication terminal in an embodiment of this application;
[0064] Figure 18 is a schematic diagram of a method embodiment applied to an optical emitting component in this application. Detailed Implementation
[0065] First, let's introduce the system to which this application applies.
[0066] Optical transmitting components are core devices in optical communication systems. Optical networks can be applied to data center networks (DCNs), metropolitan area networks (MANs), passive optical networks (PONs), optical transport networks (OTNs), and more, with no specific limitations. Figure 1 schematically illustrates one possible structure of an optical network. Referring to Figure 1, an optical network includes, but is not limited to, communication device 1, communication device 2, communication device 3, and an optical interconnect network. Different communication devices can transmit optical signals through the optical interconnect network. An optical network may include more or fewer communication devices.
[0067] The devices or networks represented by the different rectangles in Figure 1 can be deployed in different or the same geographical locations. For example, an optical network can be deployed in a single rack or multiple racks in a data center. Figure 2 schematically illustrates one possible deployment method for an optical network. Referring to Figure 2, the optical network can be located within a rack in a data center, which is used to house various communication devices and the optical interconnect network.
[0068] An optical interconnect network may include one or more optical communication links. Hereinafter, we will use optical fiber as an example for the optical communication link. Optionally, the optical interconnect network may also include one or more optical switching devices used to switch optical signals.
[0069] Figure 3 schematically illustrates the structure of communication device 1 and communication device 2 connected in an optical network. As shown in Figure 3, communication device 1 further includes optical modules 11 to 1N installed on communication device 1, and communication device 2 further includes optical modules 21 to 2N installed on communication device 2. Optical modules 11 to 1N are connected to optical modules 21 to 2N respectively via optical fibers 1 to N. Here, N is a positive integer. This application does not limit the number of optical modules in a single communication device.
[0070] Optionally, the optical network may also include other types of equipment besides communication equipment and optical interconnection networks. As shown in Figure 3, the optical network may also optionally include an operation administration and maintenance (OAM) unit, which connects to network device 1 and network device 2 respectively.
[0071] Figure 4 schematically illustrates another structure of communication device 1 and communication device 2 in an optical network. As shown in Figure 4, communication device 1 further includes optical module 1, and communication device 2 further includes optical module 2. Optical module 1 and optical module 2 are connected via optical fiber 1. Communication device 1 may include a greater number of optical modules, and communication device 2 may include a greater number of optical modules. For example, optical module 1 can be any of the optical modules 11 to 1N shown in Figure 3, and optical module 2 can be any of the optical modules 21 to 2N shown in Figure 3.
[0072] Optical modules for communication equipment can be mounted on the communication equipment itself. Mounting an optical module on a communication device can be understood as the optical module being fixed to the communication device, and a communication connection being established between the optical module and the communication device. An example of this type of optical module is a co-packaged optics (CPO). Alternatively, the optical module can be pluggably mounted on the communication device, or alternatively, it can be non-pluggably integrated into the communication device. An example of this type of optical module is a linear-drive pluggable optics (LPO).
[0073] This application does not limit the type of communication equipment. For example, the communication equipment may be an optical line terminal (OLT), an optical network unit (ONU), a server, an optical access device, an optical switching device, an optical amplification device, an optical transport network (OTN) transmission device, or a computer device, etc.
[0074] Optical modules are used for photoelectric conversion. For example, an optical module can convert an electrical signal into an optical signal, or an optical signal into an electrical signal, or both.
[0075] With the development of communication technology, traditional pluggable optical module technology can hardly support high computing power requirements. Therefore, co-packaged optics (CPO) technology has been introduced. In CPO technology, optical chips and electrical chips are placed in the same package to shorten the distance of optoelectronic interconnection and electrical connection, and reduce the transmission loss of electrical signals.
[0076] Co-packaged optics is an optoelectronic integration technology that integrates optical chips and electronic chips (such as application-specific integrated circuits (ASICs) or switching chips) into the same package using advanced packaging techniques. Its core principle is to shorten the physical distance between the optical engine (including lasers, modulators, or detectors) and the computing chip, reducing the centimeter-level electrical interconnections between traditional pluggable optical modules and chips to the millimeter level. This reduces signal transmission loss and power consumption while simultaneously increasing bandwidth density and system integration.
[0077] The following describes CPO with reference to Figures 5 and 6, which are schematic diagrams of a package using CPO technology. As shown in Figure 5, the package includes: a printed circuit board (PCB), a co-packaged substrate, an application-specific integrated circuit (ASIC), an optics substrate, a digital signal processor (DSP), an optical transmitter, a fiber optic connector, and an optical fiber. The optical substrate is optional; when the package does not include the optical substrate, the DSP and optical transmitter are integrated on the co-packaged substrate. The ASIC establishes a connection with the DSP and optical transmitter through the co-packaged substrate, enabling extra-short reach (XSR) transmission. Figure 6 shows a top view of the package. Multiple optical transmitters and the ASIC are integrated on a substrate, which is further integrated on the PCB.
[0078] To meet high computing power requirements, optical transmitters using CPO technology have increased the number of optical channels. However, as the number of optical channels in a single optical transmitter increases, the probability of channel failure also increases. Furthermore, with the increase in the number of optical channels in CPO technology, the spacing between channels decreases, resulting in severe crosstalk between channels. Therefore, improving the reliability of optical transmitters and enhancing crosstalk immunity between optical channels has become an urgent problem to be solved.
[0079] To address the aforementioned technical problems, this application provides an optical emitting component, a method for applying the optical emitting component, and related apparatus. The optical emitting component includes two mutually redundant lasers or modulators, which are driven by a set of differential signals output from a driver. In the event of a failure in one laser or modulator, the other laser or modulator is driven by the differential signals, improving the reliability of the optical emitting component. Furthermore, since the optical emitting component drives the two lasers or modulators through a set of differential signals from the driver, the differential signals can reference each other, improving the anti-interference performance of the optical emitting component.
[0080] Next, with reference to the accompanying drawings, an optical emitting component and related apparatus according to an embodiment of this application will be described. Please refer to Figure 7, which is a schematic structural diagram of an optical emitting component 100 according to an embodiment of this application. The optical emitting component 100 includes: a first component 1001, a second component 1002, and a driver 1003, wherein the first component 1001 outputs an optical signal, and the second component 1002 outputs an optical signal; the first port of the first component 1001 is grounded; the first port of the second component 1002 is grounded; the second port of the first component 1001 is connected to the first output port of the driver 1003, and the first output port of the driver 1003 is used to drive the first component 1001 to work; the second port of the second component 1002 is connected to the second output port of the driver 1003, and the second output port of the driver 1003 is used to drive the second component 1002 to work; the first output port and the second output port of the driver 1003 are a pair of differential output ports.
[0081] The optical emitting component 100 operates as follows: the first component 1001 and the second component 1002 serve as backups for each other, improving the reliability of the optical emitting component 100. If the first component 1001 is in an abnormal state, the driver 1003 is used to disable the first component 1001 and to drive the second component 1002 to operate; or, if the second component 1002 is in an abnormal state, the driver 1003 is used to disable the second component 1002 and to drive the first component 1001 to operate.
[0082] In one possible implementation, driver 1003 is used to disable the first component 1001 and to enable the second component 1002, comprising: the signal at the first output port of driver 1003 is less than a first threshold, and the signal at the second output port of driver 1003 is greater than or equal to a second threshold. The signal at the first output port being less than the first threshold causes the first component 1001 to be in a disabled state; the signal at the second output port being greater than or equal to the second threshold causes the second component 1002 to be in a working state. The driver 1003 is used to disable the second component 1002 and to enable the first component 1001, comprising: the signal at the second output port of driver 1003 being less than the second threshold, and the signal at the first output port of driver 1003 being greater than or equal to the first threshold. The signal at the second output port being less than the second threshold causes the second component 1002 to be in a disabled state; the signal at the first output port being greater than or equal to the first threshold causes the first component 1001 to be in a working state.
[0083] In one example, the signal at the first output port of driver 1003 is less than a first threshold, and the signal at the second output port of driver 1003 is greater than or equal to a second threshold, including: driver 1003 turning off the signal at the first output port, and driver 1003 turning on the signal at the second output port. The signal at the second output port of driver 1003 is less than the second threshold, and the signal at the first output port of driver 1003 is greater than or equal to the first threshold, including: driver 1003 turning off the signal at the second output port, and driver 1003 turning on the signal at the first output port.
[0084] The first output port and the second output port of driver 1003 are a pair of differential output ports, and the signals output from the first output port and the second output port are a pair of differential signals. Specifically, the first output port outputs a positive-phase signal and the second output port outputs a negative-phase signal; or, the first output port outputs a negative-phase signal and the second output port outputs a positive-phase signal; the positive-phase signal and the negative-phase signal have the same amplitude and opposite phase.
[0085] Optionally, the first component 1001 and the second component 1002 are directly modulated lasers. Exemplarily, the laser includes, but is not limited to, devices capable of generating laser beams such as vertical-cavity surface-emitting lasers (VCSELs) or edge-emitting lasers (EELs). Alternatively, the laser can be a distributed feedback laser (DFB), a Fabry-Perot (FP) laser, a distributed Bragg reflector (DBR) laser, a quantum dot laser, or a quantum well laser, etc. The optical emitting assembly 100 provided in this application embodiment does not limit the type of laser.
[0086] Optionally, the first component 1001 and the second component 1002 are modulators. The driver 1003 of the optical emitting component 100 amplifies and / or shapes the electrical signal input to the optical emitting component 100 and outputs it to the modulator, which modulates the input electrical signal into an optical signal. Exemplarily, the modulator can be any of the following types: a Mach-Zehnder modulator (MZ) or an externally modulated laser (EML).
[0087] Next, taking the first component 1001 as the first laser and the second component 1002 as the second laser as an example, the connection relationship of each component in the optical emitting assembly 100 will be introduced. In one possible configuration, the cathode of the first laser is grounded, the cathode of the second laser is grounded, the anode of the first laser is connected to the first output port of the driver 1003, and the anode of the second laser is connected to the second output port of the driver 1003. The cathodes of the first laser and the second laser are connected; in other words, the first laser and the second laser are common cathode lasers.
[0088] In the aforementioned optical emitting component 100, the first output port and the second output port of the driver 1003 are a pair of differential output ports, driving the first component 1001 and the second component 1002 respectively via differential driving. The signals output from the first output port and the second output port are mutually redundant, and the first component 1001 and the second component 1002 are mutually redundant. In the event of a failure of one component, the other component can be switched to operate, ensuring that the optical channel does not fail and improving the reliability of the optical emitting component 100. Furthermore, since the first and second output ports are a pair of differential output ports, the signals output from the first and second output ports are differential signals. Therefore, the signals output from the two output ports can reference each other, improving the anti-interference performance of the optical emitting component 100 and the anti-crosstalk performance of the corresponding optical channel.
[0089] Based on the foregoing embodiments, some possible implementations of the aforementioned optical emitting component 100 will be described below.
[0090] In one possible implementation, the optical emitting component 100 includes a first component 1001 and a second component 1002, each corresponding to a different optical channel. For clarity, please refer to Figure 8, which is another schematic diagram of the optical emitting component 100 in an embodiment of this application. The first component 1001 corresponds to optical channel #1, and the second component 1002 corresponds to optical channel #2. Optical channels #1 and #2 are different. The first component 1001 and the second component 1002 serve as backups for each other, as do optical channels #1 and #2. In the event of a failure in one optical channel, the driver 1003 switches the other optical channel to the working state, ensuring the normal operation of the optical emitting component 100.
[0091] In one example, when the optical emitting component 100 shown in Figure 8 is in normal working condition, the first component 1001 is in normal working condition (i.e., normally outputting optical signals), and the second component 1002 is in a stopped working condition (i.e., not outputting optical signals). When the first component 1001 is in an abnormal state, the optical emitting component 100 controls the second component 1002 to be in working condition (i.e., the second component 1002 normally outputs optical signals) through the driver 1003. In other words, when the optical emitting component 100 is in normal working condition, the optical channel #1 corresponding to the first component 1001 is in normal working condition, and the optical channel #2 corresponding to the second component 1002 is in an abnormal state. When optical channel #1 is in an abnormal state, the optical emitting component 100 drives the second component 1002 to the working state through the driver 1003, realizing a rapid switch of the working optical channel from optical channel #1 to optical channel #2, ensuring that the entire optical emitting component 100 is in normal working condition. The abnormal state can also be replaced by: failure state, fault state, or stopped working state.
[0092] In another possible implementation, the first component 1001 and the second component 1002 of the optical emitting assembly 100 correspond to the same optical channel. For ease of understanding, please refer to Figure 9, which is another schematic diagram of the optical emitting assembly 100 in this embodiment. The first component 1001 and the second component 1002 correspond to optical channel #1. The first component 1001 and the second component 1002 serve as backups for each other, ensuring that optical channel #1 can still function normally even when one of the components is in an abnormal state.
[0093] In one example, when the optical emitting component 100 shown in Figure 9 is in normal working condition, the first component 1001 is in normal working condition (i.e., normally outputting optical signals), and the second component 1002 is in a stopped working state (i.e., not outputting optical signals). When the first component 1001 is in an abnormal state, the optical emitting component 100 controls the second component 1002 to be in working condition (i.e., the second component 1002 normally outputting optical signals) through the driver 1003, so that the optical emitting component 100 can quickly recover from the abnormal state to normal.
[0094] In other words, under normal operating conditions, the optical emitting component 100 drives the first component 1001 to operate via the driver 1003, thus ensuring that optical channel #1 is in normal operating condition. The optical emitting component 100 also drives the second component 1002 to stop operating via the driver 1003. When optical channel #1 is in an abnormal state, the optical emitting component 100 drives the second component 1002 to switch to operating condition via the driver 1003, enabling optical channel #1 to quickly recover from the abnormal state and ensuring that the entire optical emitting component 100 is in normal operating condition.
[0095] Optionally, the optical emitting component 100 can determine whether the optical channel is in an abnormal state by monitoring the bit error rate, signal-to-noise ratio, or output power of the optical channel.
[0096] Optionally, the optical emitting component 100 further includes a bias circuit, which provides a normal operating DC current and a modulation current (or AC current) to the first component 1001 or the second component 1002. The DC current and AC current are coupled through the bias circuit to ensure that the first component 1001 or the second component 1002 is in a normal operating state. The bias circuit will affect various performance parameters of the optical emitting component 100, including but not limited to: sensitivity, linearity, and / or noise.
[0097] In one possible implementation, the bias circuit and the driver 1003 are independent of each other. For ease of understanding, please refer to FIG10, which is another schematic diagram of the optical emitting component 100 in an embodiment of this application. The optical emitting component 100 includes a first bias circuit 1004 and a second bias circuit 1005, wherein the first bias circuit 1004 is connected to the first output port of the driver 1003 and the second port of the first component 1001, respectively, and the second bias circuit 1005 is connected to the second output port of the driver 1003 and the second port of the second component 1002, respectively.
[0098] In another possible implementation, the bias circuit is built into the driver 1003. For ease of understanding, please refer to FIG11, which is another schematic diagram of the optical emitting component 100 in an embodiment of this application. The driver 1003 of the optical emitting component 100 includes a first bias circuit 1004 and a second bias circuit 1005, wherein the first bias circuit 1004 is connected to the second port of the first component 1001, and the second bias circuit 1005 is connected to the second port of the second component 1002.
[0099] For example, the first bias circuit 1004 includes at least one inductor and at least one capacitor; the second bias circuit 1005 includes at least one inductor and at least one capacitor.
[0100] Optionally, since the impedance difference between the first component 1001 and the second component 1002 and the driver 1003 may be large, it is necessary to add a resistor in the optical emitting component 100 to reduce the reflection of the transmission link and improve the transmission power.
[0101] In one possible implementation, please refer to Figure 12, which is another schematic diagram of the light emitting component 100 in an embodiment of this application. The light emitting component 100 further includes: a first resistor 1006 and a second resistor 1007, wherein the first resistor 1006 is connected to the first port and the second port of the first component 1001, respectively, and is connected in parallel with the first component 1001; the second resistor 1007 is connected to the first port and the second port of the second component 1002, respectively, and is connected in parallel with the second component 1002.
[0102] In another possible implementation, please refer to Figure 13, which is another schematic diagram of the optical emitting component 100 in an embodiment of this application. The optical emitting component 100 further includes: a first resistor 1006 and a second resistor 1007, wherein the first resistor 1006 is connected to the first output port of the driver 1003 and the second port of the first component 1001, respectively, and the first resistor 1006 is connected in series with the first component 1001; the second resistor 1007 is connected to the second output port of the driver 1003 and the second port of the second component 1002, respectively, and the second resistor 1007 is connected in series with the second component 1002.
[0103] For example, the first resistor 1006 and the second resistor 1007 are thin-film resistors or chip resistors.
[0104] The components of the aforementioned optical emitting assembly 100 can be connected in various ways. For example, the first component 1001, the second component 1002, and the driver 1003 are on the same substrate; the first component 1001 and the driver 1003 are connected by flip-chip or wire bonding; the second component 1002 and the driver 1003 are connected by flip-chip or wire bonding.
[0105] Flip chip (FC) is a leadless semiconductor packaging technology. It typically contains circuit units, and the active area of the chip is aligned and soldered to pads on a substrate or carrier via an array of solder bumps, achieving chip-substrate interconnection. Flip chips are characterized by their compact structure, eliminating the need for wire bonding and directly connecting to the substrate via bumps, significantly reducing package size and thickness, thus contributing to the miniaturization and weight reduction of electronic products. Furthermore, the extremely short connection distance between the bumps and the substrate greatly shortens the signal transmission path, reducing the adverse effects of resistance, inductance, and capacitance, effectively improving the chip's electrical performance and reliability. Direct chip-substrate contact facilitates rapid heat dissipation, improving the chip's thermal performance and preventing performance degradation or damage due to overheating.
[0106] Wire bonding (WB), also known as wire bonding, connects the logic signals or electrical signals of a chip to the outside world using metal wires. Wire bonding is characterized by low cost and high flexibility. The length, shape, and connection position of the metal wires can be flexibly adjusted according to different chip layouts and packaging requirements, adapting to various packaging forms and design needs.
[0107] As an example, the optical emitting assembly 100, which uses a flip-chip method to connect the various components, is shown in Figure 14. Figure 14 is another schematic diagram of the optical emitting assembly 100 in an embodiment of this application. In Figure 14, the laser includes a first laser and a second laser.
[0108] This optical emitting component comprises two components that act as both primary and backup, which can be lasers or modulators. Two differential signals output from a driver drive these two components respectively. In the event of a malfunction in one component, the other component is driven by the differential signal, reducing the probability of failure and improving the reliability of the optical emitting component. Furthermore, since the optical emitting component drives these two components through a set of differential signals from the driver, the two differential signals output from the driver can reference each other, improving the anti-interference performance of the optical emitting component.
[0109] Referring to the foregoing embodiments, please refer to Figure 18, which is a schematic diagram of a method embodiment applied to an optical emitting component according to this application. This application also provides a method applied to an optical emitting component, which is applied to the optical emitting component 100 described in the foregoing embodiments. The method includes:
[0110] 1801. When the first component is in normal condition, the driver outputs a first signal, which is used to drive the first component to work.
[0111] In step 1801, when the light emitting component detects that the first component is in a normal state, the driver outputs a first signal, which is used to drive the first component to work.
[0112] As in the aforementioned embodiments, the first component can be a modulator or a laser.
[0113] Further, the optical transmitter acquires the status information of the first component, which includes one or more of the following: bit error rate, signal-to-noise ratio (SNR), or output optical power. Then, the optical transmitter determines the status of the first component based on this status information. The status of the first component includes: normal state or abnormal state. For example, if the bit error rate of the first component is greater than or equal to a first threshold, the first component is determined to be in an abnormal state; if the bit error rate is less than the first threshold, the first component is determined to be in a normal state. As another example, if the SNR of the first component is greater than or equal to a second threshold, the first component is determined to be in a normal state; if the SNR is less than the second threshold, the first component is determined to be in an abnormal state. As yet another example, if the output optical power of the first component is greater than or equal to a third threshold, the first component is determined to be in a normal state; if the output optical power is less than the third threshold, the first component is determined to be in an abnormal state.
[0114] 1802. When the first component is in an abnormal state, the driver outputs a second signal, which is used to drive the second component to work. The first signal and the second signal are a set of differential signals.
[0115] In step 1802, when the light emitting component detects that the second component is in an abnormal state, the driver outputs a second signal, which is used to drive the second component to work.
[0116] As in the aforementioned embodiments, the second component can be a modulator or a laser.
[0117] In one possible implementation, the first signal is a positive phase signal and the second signal is a negative phase signal. The positive phase signal and the negative phase signal have the same amplitude and opposite phase.
[0118] In another possible implementation, the first signal is a negative phase signal and the second signal is a positive phase signal.
[0119] In one possible implementation, the first component and the second component correspond to the same optical channel.
[0120] In another possible implementation, the first component and the second component correspond to different optical channels.
[0121] By employing the above method, in the event of a malfunction in one component of the optical transmitter assembly, the other component is driven to operate via a differential signal, reducing the probability of failure and improving the reliability of the optical transmitter assembly. Furthermore, since the optical transmitter assembly drives these two components through a set of differential signals from a driver, the two differential signals output by the driver can reference each other, enhancing the anti-interference performance of the optical transmitter assembly.
[0122] In conjunction with the foregoing embodiments, this application also provides an optical module, which is a signal transmission device capable of realizing photoelectric and electro-optical conversion. At the transmitting end, it can convert electrical signals into optical signals and output them, and at the receiving end, it can convert input optical signals into electrical signals.
[0123] Please refer to Figure 15, which is a schematic diagram of an optical module according to an embodiment of this application. As shown in Figure 15, the optical module includes an optical transmitting component 100, an optical fiber interface, and a signal processing circuit; wherein, the optical transmitting component 100 adopts the scheme in the above embodiment, and is used to convert electrical signals into optical signals. The optical transmitting component 100 is connected to the optical fiber interface, which is used to connect to an external optical fiber. The optical transmitting component 100 can transmit the generated optical signal to the external optical fiber through the optical fiber interface.
[0124] The optical emitting component 100 is electrically connected to the signal processing circuit. During the signal transmission stage, the signal processing circuit can output a driving signal to the optical emitting component based on the electrical signal. Under the control of the driving signal, the optical emitting component 100 generates an optical signal corresponding to the electrical signal.
[0125] The optical module provided in this application embodiment can be applied in fiber-to-the-room access networks. Fiber-to-the-room access networks generally adopt passive optical network technology. Please refer to Figure 16, which is a schematic diagram of an optical distribution network in this application embodiment. As shown in Figure 16, the fiber-to-the-room access network using PON technology includes an optical line terminal, an optical distribution network, and multiple optical network units.
[0126] The optical line terminal (OLT) is a network-side device used to distribute data from the upper-layer service network to users. Optical network units (ONUs) are user-side devices, and multiple ONUs are located close to the user. For example, multiple ONUs can be distributed across various rooms in a user's home. The ONUs are responsible for receiving data from the OLT and providing services to the user. The user's communication equipment can be connected to the ONUs. An optical distribution network (ODN) connects the OLT and multiple ONUs, including a passive optical splitter, a backbone fiber, and multiple branch optical fibers. One end of the backbone fiber is connected to the passive optical splitter, and the other end is connected to the OLT through an optical module as described in the above embodiment. One end of each branch fiber is connected to the passive optical splitter, and the other end is connected to the corresponding ONU through an optical module as described in the above embodiment.
[0127] During downlink data transmission, the optical line terminal (OLT) converts electrical signals into optical signals using optical modules. The optical signals are then transmitted to the optical network unit (ONU) via the backbone fiber, passive splitter, and branch fiber in the optical distribution network. During uplink data transmission, the ONU converts electrical signals into optical signals using optical modules. The optical signals are then transmitted to the OLT via the branch fiber, passive splitter, and backbone fiber in the optical distribution network.
[0128] With the advancement of optical communication technology, the transmission rate of fiber-to-the-room access networks is increasing, placing higher demands on the performance of optical modules. The optical module provided in this application embodiment can meet the performance requirements of high-speed FTTR access networks with transmission rates of 10G and above, and can be used in 50GPON, for example.
[0129] This application also provides a communication terminal applied to an FTTR access network. This communication terminal can be an optical line terminal or an optical network unit in the FTTR access network. For example, the communication terminal can be an optical modem, gateway device, etc. Please refer to Figure 17, which is a schematic diagram of a communication terminal in this application embodiment. As shown in Figure 17, the communication terminal includes a circuit board and an optical module as described in the above embodiment. The optical module is electrically connected to the circuit board. The optical module can be fixedly mounted on the circuit board or electrically connected to the circuit board in a pluggable manner.
[0130] The technical effects that the communication terminal provided in this application can achieve are the same as those that the optical emitting components in any of the above embodiments can achieve, and will not be repeated here.
[0131] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A light emitting component, characterized in that, The optical emitting component includes: The device comprises a first component, a second component, and a driver, wherein the first component outputs an optical signal, and the second component outputs an optical signal. The first port of the first component is grounded; The first port of the second component is grounded; The second port of the first component is connected to the first output port of the driver, and the first output port of the driver is used to drive the first component to work. The second port of the second component is connected to the second output port of the driver, and the second output port of the driver is used to drive the second component to work; The first output port and the second output port of the driver are a pair of differential output ports.
2. The light emitting component according to claim 1, characterized in that, The first component and the second component correspond to the same optical channel.
3. The optical emitting component according to claim 1, characterized in that, The first component and the second component correspond to different optical channels.
4. The light emitting component according to any one of claims 1-3, characterized in that, The first component is a first laser, and the second component is a second laser. The cathode of the first laser is grounded; The cathode of the second laser is grounded; The anode of the first laser is connected to the first output port of the driver; The anode of the second laser is connected to the second output port of the driver.
5. The light emitting component according to any one of claims 1-3, characterized in that, The first component is a first modulator, and the second component is a second modulator.
6. The light emitting component according to any one of claims 1-5, characterized in that, If the first component is in an abnormal state, the driver is used to drive the first component to stop working, and the driver is used to drive the second component to work. Alternatively, if the second component is in an abnormal state, the driver is used to disable the second component, and the driver is used to enable the first component to operate.
7. The light emitting component according to claim 6, characterized in that, The driver is used to disable the first component, and the driver is used to enable the second component, including: The signal at the first output port of the driver is less than a first threshold, and the signal at the second output port of the driver is greater than or equal to a second threshold. The driver is used to disable the second component, and the driver is used to enable the first component, including: The signal at the second output port of the driver is less than the second threshold, and the signal at the first output port of the driver is greater than or equal to the first threshold.
8. The light emitting component according to any one of claims 1-7, characterized in that, The first output port outputs a positive phase signal, and the second output port outputs a negative phase signal; Alternatively, the first output port outputs a negative phase signal, and the second output port outputs a positive phase signal; The positive phase signal and the negative phase signal have the same amplitude, and the positive phase signal and the negative phase signal have opposite phases.
9. The light emitting component according to any one of claims 1-8, characterized in that, The optical emitting component further includes: a first bias circuit and a second bias circuit, wherein... The first bias circuit is connected to the first output port of the driver and the second port of the first component, respectively. The second bias circuit is connected to the second output port of the driver and the second port of the second component, respectively; The first bias circuit includes at least one inductor and at least one capacitor; The second bias circuit includes at least one inductor and at least one capacitor.
10. The light emitting component according to any one of claims 1-9, characterized in that, The optical emitting component further includes: a first resistor and a second resistor, wherein... The first resistor is connected to the first port and the second port of the first component, respectively, and the first resistor is connected in parallel with the first component; The second resistor is connected to the first port and the second port of the second component, respectively, and the second resistor is connected in parallel with the second component.
11. The light emitting component according to any one of claims 1-9, characterized in that, The optical emitting component further includes: a first resistor and a second resistor, wherein... The first resistor is connected to the first output port of the driver and the second port of the first component, respectively, and the first resistor is connected in series with the first component; The second resistor is connected to the second output port of the driver and the second port of the second component, respectively, and the second resistor is connected in series with the second component.
12. The light emitting component according to claim 10 or 11, characterized in that, The first resistor and the second resistor are thin-film resistors or chip resistors.
13. The light emitting component according to any one of claims 1-12, characterized in that, The first component, the second component, and the driver are on the same substrate; The first component and the driver are connected by flip-chip or wire bonding; The second component and the driver are connected by flip-chip or wire bonding.
14. An optical module, characterized in that, The optical module includes an optical fiber interface and an optical transmitting component as described in any one of claims 1 to 13, wherein the optical transmitting component is connected to the optical fiber interface.
15. A communication terminal, characterized in that, The communication terminal includes a circuit board and an optical module as described in claim 14, wherein the optical module is electrically connected to the circuit board.
16. The communication terminal according to claim 15, characterized in that, The communication terminal is an optical line terminal or optical network unit in a fiber-to-the-room access network.
17. A method applied to an optical emitting component, characterized in that, The optical emitting component includes a first component, a second component, and a driver; the method includes: When the first component is in a normal state, the driver outputs a first signal, which is used to drive the first component to work. When the first component is in an abnormal state, the driver outputs a second signal, which is used to drive the second component to work. The first signal and the second signal are a set of differential signals.
18. The method according to claim 17, characterized in that, The first signal is a positive phase signal, and the second signal is a negative phase signal; Alternatively, the first signal may be a negative phase signal and the second signal may be a positive phase signal; The positive phase signal and the negative phase signal have the same amplitude, and the positive phase signal and the negative phase signal have opposite phases.
19. The method according to claim 17 or 18, characterized in that, The method further includes: Obtain the status information of the first component, wherein the status information of the first component includes any one or more of the following: bit error rate, signal-to-noise ratio, or output power; Based on the status information of the first component, determine the status of the first component.
20. The method according to any one of claims 17-19, characterized in that, The first component and the second component correspond to the same optical channel.
21. The method according to any one of claims 17-19, characterized in that, The first component and the second component correspond to different optical channels.
22. The method according to any one of claims 17-21, characterized in that, The first component is a first laser, and the second component is a second laser.
23. The method according to any one of claims 17-21, characterized in that, The first component is a first modulator, and the second component is a second modulator.
24. An optical module, characterized in that, The optical module includes an optical fiber interface and an optical transmitting component that performs the method of any one of claims 17 to 23, the optical transmitting component being connected to the optical fiber interface.
25. A communication terminal, characterized in that, The communication terminal includes a circuit board and an optical module as described in claim 24, wherein the optical module is electrically connected to the circuit board.
26. The communication terminal according to claim 25, characterized in that, The communication terminal is an optical line terminal or optical network unit in a fiber-to-the-room access network.