Optical network unit

Abstract

The optical network unit provided by the utility model comprises a circuit board; the MAC chip is located on the circuit board; the driving circuit is located on the circuit board; the monitoring output end of the driving circuit is connected with the monitoring input end of the MAC chip so as to send a monitoring signal to the MAC chip; the control input end of the driving circuit is connected with the control output end of the MAC chip so as to receive a control signal sent by the MAC chip based on the burst working time; the optical assembly is connected with the driving circuit; the optical assembly generates an optical signal based on the driving of the driving circuit; the second control circuit is connected in series with the power supply end of the optical assembly and is connected with the monitoring output end of the driving circuit; and the second control circuit turns off the power supply end of the optical assembly based on the monitoring signal, so that the optical assembly stops generating the optical signal. When the optical network unit is still in the sudden working time, if the optical fiber, connected with the OLT, of the optical network unit is disconnected, the optical assembly can be closed in time.

Description

Technical Field

[0001] This disclosure relates to the field of optical fiber communication technology, and in particular to an optical network unit. Background Technology

[0002] Passive Optical Network (PON) is a point-to-multipoint fiber broadband access technology that can provide customers with higher data transmission speeds and stronger service quality. Figure 1 This is a diagram of a PON architecture. (Example) Figure 1 As shown, PON includes an Optical Line Terminal (OLT), an Optical Network Unit (ONU), and an Optical Distribution Network (ODN) connecting the OLT and ONU. In the downlink direction (OLT to ONU), the optical signal transmitted by the OLT reaches each ONU through the ODN; in the uplink direction (ONU to OLT), due to the transmission characteristics of the ODN, the optical signal transmitted by the ONU reaches the OLT through the ODN.

[0003] When the ONU is in a burst working period, if the optical fiber in the ODN connecting the ONU to the OLT is disconnected, the optical components in the ONU will continue to emit light, which will result in energy consumption and light pollution. Utility Model Content

[0004] In some embodiments, an optical network unit is provided that can promptly shut down optical components if the optical fiber connecting the optical network unit to the OLT is disconnected while the optical network unit is still in burst operation time.

[0005] Some embodiments provide an optical network unit, including:

[0006] Circuit board;

[0007] The MAC chip is located on the circuit board;

[0008] A driving circuit is located on the circuit board; the monitoring output terminal of the driving circuit is connected to the monitoring input terminal of the MAC chip to send a monitoring signal to the MAC chip; the control input terminal of the driving circuit is connected to the control output terminal of the MAC chip to receive the control signal issued by the MAC chip based on the burst working time.

[0009] An optical component is connected to the driving circuit; the optical component generates an optical signal during a burst of operation based on the control signal and the driving circuit.

[0010] The second control circuit is connected in series with the power supply terminal of the optical component and connected to the monitoring output terminal of the driving circuit; the second control circuit turns off the power supply terminal of the optical component based on the monitoring signal, so that the optical component stops generating optical signals.

[0011] One of the above technical solutions has the following advantages or beneficial effects: a MAC chip, a driver circuit, an optical component, and a second control circuit are arranged on the circuit board. The driver circuit can monitor the amplitude or power of the received optical signal. When the amplitude or power of the received optical signal is less than a preset value, the output of the driver circuit can output a monitoring signal. The monitoring output of the driver circuit is connected to the monitoring input of the MAC chip. When the output of the driver circuit can output a monitoring signal, the MAC chip can receive the monitoring signal and can detect an anomaly in the downlink optical signal transmission from the OLT to the optical network unit based on the monitoring signal. When the optical fiber connecting the optical network unit to the OLT is disconnected, it will cause an anomaly in the downlink optical signal transmission from the OLT to the optical network unit, and the MAC chip can detect this anomaly based on the monitoring signal.

[0012] The control output of the MAC chip is connected to the control input of the driver circuit. The MAC chip can send a control signal based on the burst operating time and transmit it to the driver circuit through the control output. This causes the driver circuit to start based on the control signal, driving the optical component to emit optical signals during the burst operating time. A second control circuit is connected in series with the power supply of the optical component and is also connected to the monitoring output of the driver circuit. The second control circuit turns the power supply of the optical component on or off. When the second control circuit is on, the optical component is in working condition and can generate optical signals; when the second control circuit is off, the optical component is in a stopped state and cannot generate optical signals. The monitoring signal allows the second control circuit to control the power supply of the optical component to shut it down, causing it to stop working. Therefore, when the optical network unit is in a burst operating time, if the optical fiber connecting the optical network unit to the OLT is disconnected, the monitoring signal and the second control circuit can promptly shut down the optical component, stopping it from generating optical signals and preventing it from emitting light during the burst emission period.

[0013] In some embodiments, an optical network unit is provided, the optical component including an optical emitting component that generates an optical signal during a burst of operation based on the control signal and the drive circuit.

[0014] The second control circuit includes a MOS transistor, the source of which is connected to a power supply, the drain of which is connected to the power supply terminal of the light emitting component, and the gate of which is connected to the monitoring output terminal of the driving circuit.

[0015] Another technical solution described above has the following advantages or beneficial effects: the second control circuit includes a MOSFET, the source of which is connected to the power supply, the drain of which is connected to the power supply terminal of the optical emitting component, and the gate of which is connected to the monitoring output terminal of the driving circuit. This allows the MOSFET to control the power supply to the optical emitting component, facilitating a timely response of the second control circuit to the monitoring signal. Specifically, during a burst of operation of the optical network unit, if the optical fiber connecting the optical network unit to the OLT is disconnected, the optical component can be stopped from continuously generating optical signals.

[0016] In some embodiments, an optical network unit is provided, wherein the second control circuit further includes a first inductor, a second inductor, and a first capacitor; one end of the first inductor is connected to the drain of the MOS transistor, and the other end of the second inductor is connected to the power supply terminal of the optical emitting component; one end of the second inductor is connected to the source of the MOS transistor, and the other end of the second inductor is connected to the other end of the first inductor; one end of the first capacitor is connected to the power supply terminal of the optical emitting component, and the other end of the first capacitor is grounded.

[0017] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: the first inductor, the second inductor and the first capacitor form a matching circuit for the MOS transistor, which can block AC signals, reduce power supply jitter of the optical emitting component, and improve the power supply quality of the optical emitting component.

[0018] In some embodiments, an optical network unit is provided, wherein the second control circuit further includes an amplifier circuit, the amplifier circuit including a transistor, the base of the transistor being connected to the monitoring output terminal of the driving circuit, the collector of the transistor being connected to the gate of the MOS transistor, and the emitter of the transistor being grounded.

[0019] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: the second control circuit includes an amplifier circuit, which includes a transistor, so as to use the transistor amplification drive circuit to monitor the signal output at the output terminal, so as to cooperate with the MOS transistor.

[0020] In some embodiments, an optical network unit is provided, wherein the driving circuit includes a laser driver, the control output terminal of a MAC chip is enabled to be connected to the control input terminal of the laser driver, and the MAC chip enables control of the laser driver based on burst working time.

[0021] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: the control output terminal of the MAC chip is enabled to connect to the control input terminal of the laser driver, and the MAC chip enables the control of the laser driver based on the burst working time, which facilitates the laser driver to respond to the control of the MAC chip in a timely manner.

[0022] In some embodiments, an optical network unit is provided, including: the output terminal of the second control circuit is further connected to the GPIO pin of the MAC chip; the MAC chip monitors the level of the output terminal of the second control circuit through the GPIO pin to determine whether the optical emitting component is turned off.

[0023] Another technical solution in the above technical solution has the following advantages or beneficial effects: the output terminal of the second control circuit is also connected to the GPIO pin of the MAC chip, so as to introduce a feedback mechanism by utilizing the GPIO pin of the MAC chip, so that the MAC chip can detect whether the optical emitting component is turned off when it needs to be turned off, so as to ensure that the optical emitting component is turned off when it needs to be turned off.

[0024] Some embodiments provide an optical network unit, including:

[0025] Circuit board;

[0026] A MAC chip is located on the circuit board; the MAC chip sends control signals based on burst working times.

[0027] A driving circuit is located on the circuit board; the monitoring output terminal of the driving circuit is connected to the monitoring input terminal of the MAC chip to send a monitoring signal to the MAC chip.

[0028] An optical component is connected to the driving circuit; the optical component generates an optical signal during a burst of operation based on the control signal and the driving circuit.

[0029] A first control circuit has a first input terminal connected to the control output terminal of the MAC chip to receive control signals issued by the MAC chip based on burst working time; a second input terminal of the first control circuit is connected to the monitoring output terminal of the drive circuit; the output terminal of the first control circuit is connected to the control input terminal of the drive circuit; the first control circuit shuts down the drive circuit based on the monitoring signal and the control signal, causing the optical component to stop generating optical signals.

[0030] Another technical solution described above has the following advantages or beneficial effects: a MAC chip, a driving circuit, an optical component, and a first control circuit are mounted on the circuit board. The driving circuit can monitor the amplitude or power of the received optical signal. When the amplitude or power of the received optical signal is less than a preset value, the output of the driving circuit can output a monitoring signal. The monitoring output of the driving circuit is connected to the monitoring input of the MAC chip. When the output of the driving circuit can output a monitoring signal, the MAC chip can receive the monitoring signal and can detect an anomaly in the downlink optical signal transmission from the OLT to the optical network unit based on the monitoring signal. When the optical fiber connecting the optical network unit to the OLT is disconnected, it will cause an anomaly in the downlink optical signal transmission from the OLT to the optical network unit, and the MAC chip can detect this anomaly based on the monitoring signal.

[0031] The first input terminal of the first control circuit is connected to the control output terminal of the MAC chip, the second input terminal of the first control circuit is connected to the monitoring output terminal of the drive circuit, and the output terminal of the first control circuit is connected to the control input terminal of the drive circuit. The MAC chip can issue a control signal through its control output terminal based on the burst operating time. The first control circuit shuts down the drive circuit based on the monitoring signal and the control signal. Therefore, when the optical network unit is in a burst operating period, if the optical fiber connecting the optical network unit to the OLT is disconnected, the drive circuit can be shut down in time based on the monitoring signal and the first control circuit, and the optical component stops generating optical signals, preventing the optical component from continuing to emit light during the burst emission period.

[0032] In some embodiments, an optical network unit is provided, wherein the driving circuit includes a laser driver, and the output of the first control circuit enables a control input terminal connected to the laser driver.

[0033] Another technical solution in the above-mentioned technical solution has the following advantages or beneficial effects: the output terminal of the first control circuit can be connected to the control input terminal of the laser driver, which facilitates the laser driver to respond to the control of the first control circuit in a timely manner.

[0034] In some embodiments, an optical network unit is provided, wherein the output of the first control circuit is also connected to the GPIO pin of the MAC chip; the MAC chip monitors the level of the output of the first control circuit through the GPIO pin to determine whether the laser driver is turned off.

[0035] Another technical solution in the above technical solution has the following advantages or beneficial effects: the output terminal of the first control circuit is also connected to the GPIO pin of the MAC chip, so as to introduce a feedback mechanism by utilizing the GPIO pin of the MAC chip, so that the MAC chip can detect whether the drive circuit has been turned off when it is necessary to turn off the drive circuit, so as to ensure that the drive circuit is turned off when it is necessary to turn off the drive circuit. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0037] Figure 1 This is a diagram of a PON architecture;

[0038] Figure 2 This is a structural diagram of an optical network unit according to some embodiments;

[0039] Figure 3 This is a partial structural diagram of an optical network unit according to some embodiments;

[0040] Figure 4 This is a structural diagram of an optical component according to some embodiments;

[0041] Figure 5 Internal structure of an optical network unit according to some embodiments Figure 1 ;

[0042] Figure 6 Internal structure of an optical network unit according to some embodiments Figure 2 ;

[0043] Figure 7 Internal structure of an optical network unit according to some embodiments Figure 3 ;

[0044] Figure 8 Internal structure of an optical network unit according to some embodiments Figure 4 ;

[0045] Figure 9 Internal structure of an optical network unit according to some embodiments Figure 5 ;

[0046] Figure 10 Internal structure of an optical network unit according to some embodiments Figure 6 ;

[0047] Figure 11 This is a partial structural diagram of another optical network unit according to some embodiments. Detailed Implementation

[0048] The embodiments of this disclosure will now be described clearly and in detail with reference to the accompanying drawings. However, the described embodiments are merely some, and not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0049] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and inclusive, meaning "including, but not limited to"; the terms "first" and "second" should not be construed as indicating or implying relative importance or indicating an upper limit on the number; the term "multiple" means two or more; the term "connection" should be interpreted broadly, for example, "connection" can be a fixed connection, a detachable connection, or an integral part, and can be a direct connection or an indirect connection through an intermediate medium; the use of the terms "applicable to" or "configured to" implies open and inclusive language, which does not exclude applicability to or configuration to devices performing additional tasks or steps; descriptions such as "parallel," "perpendicular," "identical," "consistent," and "aligned" are not limited to absolute mathematical theoretical relationships, but also include acceptable error ranges arising in practice, and differences based on the same design concept but due to manufacturing reasons.

[0050] In optical communication technology, to establish information transmission between information processing devices, information is loaded onto light, and the speed of light propagation is used to transmit the information. This light carrying information is called an optical signal. When optical signals are transmitted in optical information transmission equipment, optical power loss can be reduced, enabling long-distance transmission of optical signals. At the same time, the cost of optical information transmission equipment such as optical fibers is lower than that of electrical information transmission equipment such as copper wires. Therefore, optical communication technology can achieve high-speed, long-distance, and low-cost information transmission.

[0051] Information processing equipment typically includes ONUs, gateways, routers, switches, mobile phones, computers, servers, tablets, and televisions, while optical information transmission equipment typically includes optical fibers and optical waveguides. Information processing equipment can only recognize and process electrical signals, while optical communication technology uses optical signals for transmission, requiring optical modules or components to convert between optical and electrical signals.

[0052] Optical modules or optical components enable the mutual conversion between optical signals and electrical signals between information processing devices and optical information transmission devices. In some embodiments, at least one of the optical signal input or output terminals of the optical module or optical component is connected to an optical fiber, and at least one of the electrical signal input or output terminals of the optical module or optical component is connected to an OLT (Optical Linear Transmission Unit). A first optical signal from the optical fiber is transmitted to the optical module or optical component, which converts the first optical signal into a first electrical signal and transmits the first electrical signal to the OLT. A second electrical signal from the OLT is transmitted to the optical module or optical component, which converts the second electrical signal into a second optical signal and transmits the second optical signal to the optical fiber.

[0053] Since multiple information processing devices can transmit information via electrical signals, at least one of these devices needs to be directly connected to the optical module or optical component, rather than all of them. Here, the information processing device directly connected to the optical module or optical component is also referred to as the host computer of the optical module or optical component. Furthermore, the optical signal input or output terminal of the optical module is called an optical port, and the electrical signal input or output terminal is called an electrical port.

[0054] Figure 2 This is a structural diagram of an optical network unit according to some embodiments. For example... Figure 2 As shown, in some embodiments, the optical network unit may include a housing 100 and an optical component 200, with the optical component 200 located within the housing 100. The optical component 200 can generate and receive optical signals. The optical port of the optical component 200 is connected to an optical fiber, and the optical signals generated by the optical component 200 can be transmitted to the optical fiber. The optical signals received via the optical fiber can be transmitted to the optical component 200.

[0055] Figure 3 This is a partial structural diagram of an optical network unit according to some embodiments. Figure 4 This is a structural diagram of an optical component according to some embodiments. Figure 3 and Figure 4 As shown, in some embodiments, the optical network unit may include a circuit board 300, and the optical component 200 is electrically connected to the circuit board 300. The circuit board 300 is provided with a processor, a driver circuit 320, etc. The processor includes a MAC chip 310, etc., and the driver circuit 320 includes a laser driver, a limiting amplifier (LA), etc. The MAC chip 310 is electrically connected to the laser driver and the limiting amplifier, etc. The MAC chip 310 can send transmission signals to the laser driver, and the limiting amplifier can receive signals from the MAC chip 310. Of course, in some embodiments, the driver circuit 320 may be a chip integrating a laser driver and a limiting amplifier, etc.

[0056] In some embodiments, the optical component 200 includes a light emitting component 210 for generating an optical signal. Exemplarily, the light emitting component 210 can be electrically connected to the circuit board 300 via a flexible circuit board, or the light emitting component 210 can be directly electrically connected to the circuit board 300.

[0057] In some embodiments, the light emitting component 210 is electrically connected to the driving circuit 320. Exemplarily, the light emitting component 210 is electrically connected to a laser driver, which drives the light emitting component 210 to generate a light signal based on the emitted electrical signal.

[0058] In some embodiments, the optical component 200 includes a light receiving component 220, which receives an optical signal and outputs a received electrical signal via photoelectric conversion. Exemplarily, the light receiving component 220 can be electrically connected to the circuit board 300 via a flexible circuit board, or the light receiving component 220 can be directly electrically connected to the circuit board 300.

[0059] In some embodiments, the optical receiver 220 is electrically connected to the drive circuit 320. Exemplarily, the optical receiver 220 is electrically connected to a limiting amplifier, which limits and amplifies the received electrical signal output by the optical receiver 220.

[0060] In some embodiments, the optical component 200 may include an optical fiber component 230 for connecting to an optical fiber. Optical signals generated by the optical transmitting component 210 are transmitted to the optical fiber via the optical fiber component 230. Optical signals input through the optical fiber are transmitted to the optical receiving component 220 via the optical fiber component 230.

[0061] In some embodiments, the optical fiber component 230 may include an internal optical fiber and an optical fiber adapter. One end of the internal optical fiber is optically connected to the optical emitting component 210 and the optical receiving component 220, and the other end of the internal optical fiber is connected to the optical fiber adapter.

[0062] Figure 5 Internal structure of an optical network unit according to some embodiments Figure 1 .like Figure 5 As shown, in some embodiments, the control output terminal of the MAC chip 310 controls the control input terminal of the drive circuit 320. The MAC chip 310 sends a control signal to the drive circuit 320 through the control output terminal to control the use of the drive circuit 320. For example, the control output terminal of the MAC chip 310 controls the drive circuit 320 to suddenly start, causing the laser driver to suddenly operate, thereby causing the light emitting component 210 to suddenly emit light.

[0063] In some embodiments, the MAC chip 310 stores a burst working time, which includes a burst start time and duration. The burst working time is used to indicate the burst emission of light from the optical emitting component. The MAC chip 310 can control the laser driver to operate during the burst working time, so that the optical emitting component generates an optical signal during the burst working time. Exemplarily, based on the interaction between the OLT and the optical network unit, the OLT authorizes the burst start time and duration, and the MAC chip 310 can obtain the start time T1 and end time T2 of the transmission service. When the MAC chip 310 detects that the local time stamp has reached the start time T1, the MAC chip 310 sends a first control signal to the driving circuit 320 to turn on the laser driver and sends an emission optical signal to the laser driver, so that the laser driver drives the optical emitting component 210 to emit an optical signal. When the MAC chip 310 detects that the local time stamp has reached the end time T2, the MAC chip 310 sends a second control signal to the driving circuit 320 to turn off the laser driver, thereby turning off the optical emitting component 210 and stopping the emission of optical signals. Exemplarily, the first control signal can be high level and the second control signal can be low level.

[0064] In some embodiments, the control output terminal of the MAC chip 310 is enabled and connected to the control input terminal of the drive circuit 320, so as to enable and control the drive circuit 320 through the MAC chip 310. For example, the control output terminal of the MAC chip 310 is enabled and connected to the control input terminal of the laser driver, and the MAC chip 310 sends an enable signal to control the laser driver to turn off and on.

[0065] In some embodiments, when the MAC chip 310 detects that the local time stamp has reached the start time T1, the control output terminal of the MAC chip 310 outputs a high level.

[0066] In some embodiments, the monitoring input terminal of the MAC chip 310 is connected to the monitoring output terminal of the driving circuit 320 to obtain a monitoring signal, such as a loss of signal (LOS) signal. Based on the LOS signal, the MAC chip 310 determines whether the optical receiving component 220 can receive the optical signal. For example, when the signal amplitude or optical power received by the optical receiving component 220 is too small to be suitable for transmission in the system and may cause packet loss or service interruption, the driving circuit 320 can generate an LOS signal and send the LOS signal to the MAC chip 310.

[0067] In some embodiments, the LOS signal may be low. When the signal amplitude or optical power received by the optical receiving component 220 is less than a preset value, the monitoring output terminal of the driving circuit 320 outputs a low level; when the signal amplitude or optical power received by the optical receiving component 220 is greater than or equal to the preset value, the monitoring output terminal of the driving circuit 320 outputs a high level.

[0068] If the optical fiber connecting the optical network unit (ONU) to the OLT is disconnected due to testing, malfunction, or other reasons, the ONU will not receive any optical signal, and the driver circuit 320 will generate a LOS signal. If the ONU is still in burst operation, the optical transmitter 210 will continue to transmit optical signals until the MAC chip 310 detects that the local time stamp has reached the end time T2, at which point the MAC chip 310 will shut down the optical transmitter 210. From the moment the optical fiber is disconnected until the end time T2, the optical transmitter 210 will continuously transmit optical signals, resulting in energy consumption and light pollution.

[0069] Figure 6 Internal structure of an optical network unit according to some embodiments Figure 2 .like Figure 6 As shown, in some embodiments, a first control circuit 330 may be provided on the circuit board 300. The first input terminal of the first control circuit 330 is connected to the control output terminal of the MAC chip 310, the second input terminal of the first control circuit 330 is connected between the monitoring input terminal of the MAC chip 310 and the monitoring output terminal of the drive circuit 320, and the output terminal of the first control circuit 330 is connected to the control input terminal of the drive circuit 320. The first control circuit 330 determines whether to control the drive circuit 320 based on the control signal and the LOS signal. For example, the first input terminal of the first control circuit 330 is connected to the control output terminal of the MAC chip 310, the second input terminal of the first control circuit 330 is connected to the monitoring output terminal of the drive circuit 320, and the output terminal of the first control circuit 330 is connected to the control input terminal of the laser driver. Thus, when the optical network unit is still in burst operation, if the optical fiber connecting the optical network unit to the OLT is disconnected, causing the optical receiving component 220 to be unable to receive the optical signal, the first control circuit 330 can promptly shut down the laser driver, etc., to stop the optical emitting component 210 from emitting the optical signal.

[0070] In some embodiments, the first control circuit 330 includes an AND gate. The first input of the AND gate is connected to the control output of the MAC chip 310, the second input of the AND gate is connected to the monitoring output of the drive circuit 320, and the output of the AND gate is connected to the control input of the laser driver. For example, when the control output of the MAC chip 310 outputs a first control signal and the monitoring output of the drive circuit 320 outputs a high level, the AND gate outputs a high level, and the laser driver is turned on. When the control output of the MAC chip 310 outputs a second control signal or the monitoring output of the drive circuit 320 outputs a low level, the AND gate outputs a low level, and the laser driver is turned off. Thus, when the optical network unit is still in burst operation, if the optical fiber connecting the optical network unit to the OLT is disconnected, causing the optical receiving component 220 to be unable to receive optical signals, the first control circuit 330 can promptly turn off the laser driver to stop the optical emitting component 210 from emitting optical signals.

[0071] Figure 7 Internal structure of an optical network unit according to some embodiments Figure 3 .like Figure 7 As shown, in some embodiments, the output of the first control circuit 330 is also connected to the GPIO pin of the MAC chip 310. The MAC chip 310 can confirm the state of the output of the first control circuit 330 through the GPIO pin to confirm whether the laser driver is turned off. When the optical network unit is still in burst operation, if the signal amplitude or optical power received by the optical receiving component 220 is less than a preset value, the GPIO pin can be used to confirm whether the laser driver is turned off, so as to ensure that the optical emitting component 210 is turned off in time.

[0072] In some embodiments, when the signal amplitude or optical power received by the optical receiving component 220 is less than a preset value, if the input level of the GPIO pin is high, the control output terminal of the MAC chip 310 outputs a second control signal to turn off the laser driver through the second control signal.

[0073] Figure 8 Internal structure of an optical network unit according to some embodiments Figure 4 .like Figure 8 As shown, in some embodiments, a second control circuit 340 may be provided on the circuit board 300, and the second control circuit 340 is located at the power supply terminal of the light emitting component 210. The output terminal of the second control circuit 340 is connected to the power supply terminal of the light emitting component 210, and the second control circuit 340 can turn the power supply of the light emitting component 210 on or off. Exemplarily, the first input terminal of the second control circuit 340 is connected to the power supply, the second input terminal of the second control circuit 340 is connected between the monitoring input terminal of the MAC chip 310 and the monitoring output terminal of the drive circuit 320, and the output terminal of the second control circuit 340 is connected to the power supply terminal of the light emitting component 210.

[0074] Figure 9 Internal structure of an optical network unit according to some embodiments Figure 5 .like Figure 9As shown, in some embodiments, the second control circuit 340 includes a MOSFET 341, which can turn the power supply of the light emitting component 210 on or off. The MOSFET 341 may be a P-MOSFET. Exemplarily, the source of the MOSFET 341 is connected to a power supply, which may be the output terminal of a power management circuit; the drain of the MOSFET 341 is connected to the power supply terminal of the light emitting component 210; and the gate of the MOSFET 341 is connected to the monitoring output terminal of the driving circuit 320. The signal output from the monitoring output terminal of the driving circuit 320 can control the conduction or cutoff of the MOSFET 341, so as to turn the power supply of the light emitting component 210 on or off based on the signal output from the monitoring output terminal of the driving circuit 320, thereby turning the light emitting component 210 on or off.

[0075] In some embodiments, the second control circuit 340 further includes a first inductor 342 and a second inductor 343. One end of the first inductor 342 is connected to the drain of the MOSFET 341, and the other end of the first inductor 342 is connected to the power supply terminal of the light emitting component 210. One end of the second inductor 343 is connected to the source of the MOSFET 341, and the other end of the second inductor 343 is connected to the other end of the first inductor 342. The first inductor 342 and the second inductor 343 can block AC signals to ensure the power quality of the light emitting component 210.

[0076] In some embodiments, the second control circuit 340 further includes a first capacitor 344. One end of the first capacitor 344 is connected to the power supply terminal of the light emitting component 210, and the other end of the first capacitor 344 is grounded. The first capacitor 344, together with the first inductor 342 and the second inductor 343, can block AC signals to improve the power quality of the light emitting component 210.

[0077] In some embodiments, the second control circuit 340 may include an amplifier circuit 345, the input of which is connected to the monitoring output, and the output of which is connected to the gate of the MOSFET 341. The amplifier circuit 345 amplifies the signal output from the monitoring output of the drive circuit 320.

[0078] In some embodiments, the amplifier circuit 345 may include a transistor 3451. The base of the transistor 3451 is connected to the monitoring output terminal of the driver circuit 320, the collector of the transistor 3451 is connected to the gate of the MOSFET 341, and the emitter of the transistor 3451 is grounded. The transistor 3451 can amplify the signal output from the monitoring output terminal of the driver circuit 320. Exemplarily, the transistor 3451 can be used in conjunction with matching resistors and matching capacitors to adjust the amplification factor of the amplifier circuit 345.

[0079] Figure 10 Internal structure of an optical network unit according to some embodiments Figure 6 .like Figure 10As shown, in some embodiments, the output of the second control circuit 340 is also connected to the GPIO pin of the MAC chip 310. The MAC chip 310 can confirm the state of the output of the second control circuit 340 through the GPIO pin to confirm whether the optical emitting component 210 is turned off. When the optical network unit is still in burst operation, if the signal amplitude or optical power received by the optical receiving component 220 is less than a preset value, the GPIO pin can be used to confirm whether the optical emitting component 210 is turned off, to ensure that the optical emitting component 210 is turned off in a timely manner.

[0080] In some embodiments, when the signal amplitude or optical power received by the optical receiving component 220 is less than a preset value, if the input level of the GPIO pin is high, the control output terminal of the MAC chip 310 outputs a second control signal to turn off the laser driver through the second control signal, thereby ensuring that the optical emitting component 210 is turned off.

[0081] In some embodiments, the optical component 200 and driving circuit 320 are encapsulated in a shell to form an optical module, which is pluggable to an optical network unit. The shell includes an upper shell and a lower shell. The upper shell covers the lower shell, forming two openings, one of which is an electrical port and the other is an optical port. In some embodiments, the shell forms a single opening that serves as both an electrical port and an optical port.

[0082] In some embodiments, the upper and lower housings are made of metal materials, which facilitates electromagnetic shielding and heat dissipation.

[0083] In some embodiments, a circuit board may be disposed within the housing, and the optical component 200 is electrically connected to the circuit board. Exemplarily, the light emitting component 210 and the light receiving component 220 are respectively electrically connected to the circuit board via a flexible circuit board.

[0084] In some embodiments, the first control circuit or the second control circuit may be disposed on a circuit board inside the housing. Gold fingers are formed at the ends of the circuit board inside the housing, and each gold finger consists of a plurality of independent pins. The gold fingers are electrically connected to circuit board 300.

[0085] Figure 11 This is a partial structural diagram of another optical network unit according to some embodiments. Figure 11 As shown in some embodiments, in order to clearly illustrate the connection relationship between the optical module 400 and the optical network unit, Figure 11 Only the structure related to the optical network unit and optical module 400 is shown. Optical module 400 encapsulates optical components 200 and driving circuits, etc. Figure 11 As shown, in some embodiments, the surface of the circuit board 300 is covered by a cage 101; the optical module 400 is inserted into the cage 101 and fixed by the cage 101.

[0086] In some embodiments, a heat sink 102 is provided on the cage 101 to dissipate heat for the optical module; in some embodiments, the heat sink 102 has protruding structures such as fins to increase the heat dissipation area.

[0087] In some embodiments, an electrical connector is provided inside the cage 101, which is configured to connect to the electrical port of the optical module 400.

[0088] In some embodiments, the optical module 400 is inserted into the cage 101, and the cage 101 fixes the optical module 400. The heat generated by the optical module 400 is conducted to the cage 101 and then diffused through the heat sink 102.

[0089] In some embodiments, the optical module 400 is inserted into the cage 101, and the electrical port of the optical module 400 is connected to the electrical connector inside the cage 101, thereby establishing an electrical signal connection between the optical module 400 and the optical network unit.

[0090] In some embodiments, the optical port of the optical module 400 is connected to the optical fiber 01, thereby enabling the optical module 400 to establish an optical signal connection with the optical fiber 01.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. An optical network unit, characterized by The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. The application relates to a circuit board, a MAC chip, a driving circuit, a monitoring output end of the driving circuit, a monitoring input end of the MAC chip, a control input end of the driving circuit, a control output end of the MAC chip, a light component, a second control circuit, a light emitting component, a MOS tube, a first inductor, a second inductor, a first capacitor, an amplification circuit, a laser driver, a GPIO pin of the MAC chip, and a first input end of the first control circuit. ​ 2. An optical network unit as claimed in claim 1, characterised in that, ​ ​ 3. An optical network unit as claimed in claim 2, characterised in that, ​ 4. An optical network unit as claimed in claim 2, characterised in that, ​ 5. The optical network unit of claim 3, wherein, ​ 6. The optical network unit of claim 2, wherein, ​ 7. An optical network unit, characterized by ​ ​ ​ ​ ​ ​ ​ ​ ​ The second input end of the first control circuit is connected with the monitoring output end of the driving circuit; the output end of the first control circuit is connected with the control input end of the driving circuit; the first control circuit turns off the driving circuit based on the monitoring signal and the control signal, so that the optical component stops generating the optical signal.

8. An optical network unit as claimed in claim 7, characterised in that, The driving circuit comprises a laser driver, and the output end of the first control circuit is connected with the control input end of the laser driver.

9. An optical network unit as claimed in claim 8, characterised in that, The output end of the first control circuit is also connected with the GPIO pin of the MAC chip; the MAC chip monitors the level of the output end of the first control circuit through the GPIO pin, so as to determine whether the laser driver is turned off.

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