Optical transceiver, service board and communication device

Abstract

The invention provides an optical transceiver, a service board and communication equipment, and belongs to the technical field of optical communication. The optical transceiver device comprises N ports, a receiving light splitting assembly and at least one first detector, the N ports are used for being connected with the N ODNs one by one, the at least one first detector is a single-wavelength detector, N is larger than 1, and the N ports are used for receiving N beams of first optical signals from the N ODNs and inputting the N beams of first optical signals to the receiving light splitting assembly, the N beams of first optical signals come from different ODNs, the receiving light splitting assembly is used for carrying out wave splitting on each beam of first optical signals in the N beams of first optical signals and then outputting the first optical signals to a first detector with the corresponding wavelength, the optical signals with the same wavelength in the at least two beams of first optical signals are sent to the same first detector, and the at least one first detector is used for receiving the N beams of first optical signals. And converting the received optical signal into an electric signal. The optical transceiver can provide a plurality of ports to connect a plurality of ODNs through a set of devices.

Description

Technical Field

[0001] The present disclosure relates to the field of optical communication technologies, and particularly to an optical transceiver device, a service board, and a communication device. Background Art

[0002] A passive optical network (PON) is a point-to-multipoint fiber network architecture, which includes three parts: an optical line terminal (OLT), an optical distribution network (ODN), and an optical network terminal (ONT), or three parts: an OLT, an ODN, and an optical network unit (ONU). Among them, the fiber interface of the OLT is connected to multiple ONTs or multiple ONUs through the ODN. The signal transmission from the OLT to the ONU is downlink transmission, which adopts a broadcast mode, and the signal transmission from the ONU to the OLT is uplink transmission, which adopts a time-division multiplexing mode.

[0003] Both the OLT and the ONU use optical transceiver devices to realize the transceiver of optical signals. Each optical transceiver device includes a port, which is used to connect to an ODN. The terminal devices connected to the ODN share the resources of one optical transceiver device. When the number of terminal devices connected to the ODN is small, it will cause waste of resources. Summary of the Invention

[0004] The present disclosure provides an optical transceiver device, a service board, and a communication device, which can enable multiple ODNs to share the resources of one optical transceiver device.

[0005] In a first aspect, the present disclosure provides an optical transceiver device, which includes N ports, a receiving beam splitting component, and at least one first detector. The N ports are used to be connected to N ODNs one by one. The at least one first detector is a single-wavelength detector, and N is greater than 1. The N ports are used to receive N first optical signals from the N ODNs and input the N first optical signals to the receiving beam splitting component. The N first optical signals come from different ODNs. The receiving beam splitting component is used to split each of the N first optical signals and output it to the first detector corresponding to the wavelength. The optical signals with the same wavelength in at least two of the N first optical signals are sent to the same first detector. The at least one first detector is used to convert the received optical signal into an electrical signal.

[0006] In the solution shown in the present disclosure, the optical transceiver device can provide multiple ports. The multiple ports are used to connect to multiple different ODNs. The multiple ODNs send multiple first optical signals. The optical signals with the same wavelength in at least two first optical signals are sent to the same first detector, so that different ODNs share the receiving resources of one first detector. In this way, when the number of terminal devices connected to the ODN is small, resources will not be wasted.

[0007] In an alternative manner, the receiving optical splitting component includes N optical multiplexers / demultiplexers. Each optical multiplexer / demultiplexer is connected to one of the N ports and is also connected to at least one first detector. Different optical multiplexers / demultiplexers are connected to different ports. The N ports are used to input N first optical signals to the N optical multiplexers / demultiplexers. Each optical multiplexer / demultiplexer is used to receive one first optical signal, demultiplex the one first optical signal, and output it to the first detector corresponding to the wavelength.

[0008] In an alternative manner, the optical transceiver device further includes at least one signal transmitting component. The signal transmitting component includes a light source and a modulation and optical splitting module. The wavelengths of the optical signals output by different signal transmitting components are different. The light source is connected to the modulation and optical splitting module. The modulation and optical splitting module is connected to the receiving optical splitting component. The light source is used to output a second optical signal. The modulation and optical splitting module is used to receive the second optical signal, perform data modulation and optical splitting processing on the second optical signal to obtain N third optical signals, and output them to the receiving optical splitting component. The N third optical signals include at least one in-phase signal and / or at least one anti-phase signal. The receiving optical splitting component is further used to multiplex the third optical signals from at least one signal transmitting component to obtain N optical signals and output them to the N ports. The N ports are further used to output the N optical signals.

[0009] In the solution shown in the present disclosure, multiple ODNs share the transmitting resources of one optical transceiver device. The multiple ODNs use naturally existing in-phase signals and anti-phase signals, which will not cause additional losses.

[0010] In an alternative manner, the modulation and optical splitting module includes a first modulator. The receiving optical splitting component includes a first optical multiplexer / demultiplexer and a second optical multiplexer / demultiplexer. N is equal to 2. The first modulator is respectively connected to the first optical multiplexer / demultiplexer and the second optical multiplexer / demultiplexer. Among the two ports, one port is connected to the first optical multiplexer / demultiplexer, and the other port is connected to the second optical multiplexer / demultiplexer. The first modulator is used to receive the second optical signal, perform data modulation processing on the second optical signal to obtain two third optical signals, and output them to the first optical multiplexer / demultiplexer and the second optical multiplexer / demultiplexer respectively. The two third optical signals include an in-phase signal and an anti-phase signal. The first optical multiplexer / demultiplexer is used to multiplex the third optical signals from at least one signal transmitting component to obtain one optical signal and output it to the connected port. The second optical multiplexer / demultiplexer is used to multiplex the third optical signals from at least one signal transmitting component to obtain one optical signal and output it to the connected port.

[0011] In the solution shown in the present disclosure, when two ports are provided in the optical transceiver device, a naturally existing in-phase signal beam and an anti-phase signal beam are directly used for two ODNs connected to the two ports, without introducing additional loss.

[0012] In an alternative manner, in at least one signal transmission component, the first signal transmission component further includes a variable optical splitter, a second modulator, and a first optical switch. The variable optical splitter is located between the light source and the first modulator and the second modulator, and the first optical switch is located between the second optical combiner / demultiplexer and the first modulator and the second modulator. When N ODNs share modulation resources, the variable optical splitter inputs a second optical signal to the first modulator, and the first modulator performs data modulation processing on the second optical signal to obtain two beams of third optical signals, which are respectively output to the first optical combiner / demultiplexer and the first optical switch. When N ODNs do not share modulation resources, the variable optical splitter divides the second optical signal into two beams of optical signals, which are respectively output to the first modulator and the second modulator. The first modulator performs data modulation processing on a received beam of optical signal to obtain a beam of third optical signal, which is output to the first optical combiner / demultiplexer. The second modulator performs data modulation processing on a received beam of optical signal to obtain a beam of third optical signal, which is output to the first optical switch. The first optical switch is configured to input the received third optical signal to the second optical combiner / demultiplexer.

[0013] In the solution shown in the present disclosure, when the optical transceiver device is connected to two ODNs, when the two ODNs do not share modulation resources, through the combined use of the variable optical splitter and the optical switch, the signals of the two ODNs are respectively modulated by the first modulator and the second modulator. When the two ODNs share modulation resources, the signals of the two ODNs are both modulated by the first modulator. In this way, it is possible to dynamically adjust whether the two ODNs share modulation resources.

[0014] In an alternative manner, the optical transceiver device further includes a second detector corresponding to a first wavelength and a second optical switch. The first wavelength belongs to the wavelength of the optical signal detected by at least one first detector. The receiving optical component includes a first optical combiner / demultiplexer and a second optical combiner / demultiplexer. The first optical combiner / demultiplexer is connected to the first detector corresponding to the first wavelength. The second optical switch is located between the second optical combiner / demultiplexer and the first detector and the second detector corresponding to the first wavelength. The first optical combiner / demultiplexer is configured to input the optical signal of the first wavelength in the received first optical signal to the first detector corresponding to the first wavelength. The second optical combiner / demultiplexer is configured to input the optical signal of the first wavelength in the received first optical signal to the second optical switch. The second optical switch is configured to input the received optical signal to the first detector corresponding to the first wavelength when N ODNs share receiving resources, and input the received optical signal to the second detector corresponding to the first wavelength when N ODNs do not share receiving resources. The second detector is configured to convert the received optical signal into an electrical signal.

[0015] In the solution shown in the present disclosure, the optical transceiver device is connected to two ODNs. The optical transceiver device further includes a second detector and a second optical switch. The second optical switch is respectively connected to the second detector and the first detector, and is also connected to the second multiplexer / demultiplexer. When the second optical switch receives the optical signal input by the second multiplexer / demultiplexer, in the case where the two ODNs share the receiving resources, it inputs the received optical signal to the first detector, and in the case where the two ODNs do not share the receiving resources, it inputs the received optical signal to the second detector, while the optical signal received by the first multiplexer / demultiplexer is always output to the first detector. In this way, it is possible to dynamically adjust whether the two ODNs share the first detector, and further realize the dynamic adjustment of whether the two ODs share the receiving resources.

[0016] In an alternative manner, the optical transceiver device further includes a light source, a third modulator, and a third optical switch. The light source is connected to the third modulator, the third modulator is connected to the third optical switch, and the third optical switch is respectively connected to N multiplexer / demultiplexers. The light source is used to output a second optical signal, the third modulator is used to receive the second optical signal, perform data modulation processing on the second optical signal to obtain a beam of in-phase signal or a beam of anti-phase signal, and output it to the third optical switch. The third optical switch is used to output the received optical signal to the target multiplexer / demultiplexer according to the usage time periods of the N ODNs. The target multiplexer / demultiplexer is the multiplexer / demultiplexer connected to the target port, and the target port is the port connected to the ODN that is currently in the usage time period. Each multiplexer / demultiplexer is further used to input the received optical signal to the connected port, and each port is further used to output the received optical signal.

[0017] In the solution shown in the present disclosure, during the usage time period of the OND, the third optical switch outputs the received optical signal to the ODN. In this way, multiple ODNs time-division multiplex the transmission resources of one optical receiving device.

[0018] In an alternative manner, the receiving optical splitting component includes a filter mirror and M demultiplexing modules. At least one first detector includes M first detectors. The N ports are located on the reflected input optical path of the filter mirror. The M demultiplexing modules correspond to the M first detectors one by one. The M demultiplexing modules are arranged in sequence. The first demultiplexing module is located on the optical path between the filter mirror and the first first detector. The i-th demultiplexing module is located on the optical path between the (i - 1)-th demultiplexing module and the i-th first detector. The filter mirror is used to receive N beams of first optical signals, reflect the N beams of first optical signals to the first demultiplexing module. Each of the first to (M - 1)-th demultiplexing modules is used to output the optical signals belonging to the corresponding first detector among the received N beams of optical signals to the corresponding first detector, and output the other optical signals to the next demultiplexing module. The M-th demultiplexing module is used to reflect and output the received N beams of optical signals to the corresponding first detector.

[0019] In the solution shown in the present disclosure, the receiving optical splitting component includes a filtering mirror and a wavelength division mirror. Through the cooperation of the filtering mirror and the wavelength division mirror, the optical signals with the same wavelength in multiple ports enter a first detector for detection. In this way, multiple ODNs share one optical transceiver device through a spatial optical path.

[0020] In an optional manner, each wavelength division module includes a wavelength division mirror and a focusing lens. M focusing lenses correspond one-to-one with M first detectors. The M focusing lenses are located on the optical path between the M wavelength division mirrors and the M first detectors. Each wavelength division mirror in the 1st to the (M - 1)th wavelength division modules is configured to output the optical signals belonging to the corresponding first detector among the received N optical signals to the corresponding focusing lens, and output the other optical signals to the wavelength division mirror of the next wavelength division module. The wavelength division mirror in the Mth wavelength division module is configured to reflect and output the received N optical signals to the corresponding focusing lens. Each focusing lens is configured to focus the input N optical signals and output them to the corresponding first detector.

[0021] In an optional manner, the 1st wavelength division module is configured to transmit and output the optical signals belonging to the corresponding first detector among the N first optical signals to the corresponding first detector, and reflect and output the other optical signals to the 2nd wavelength division module, or reflect and output the optical signals belonging to the corresponding first detector among the N first optical signals to the corresponding first detector, and transmit and output the other optical signals to the 2nd wavelength division module. Each of the 2nd to the (M - 1)th wavelength division modules is configured to reflect and output the optical signals belonging to the corresponding first detector among the received N optical signals to the corresponding first detector, and transmit and output the other optical signals to the next wavelength division module.

[0022] In an optional manner, the optical transceiver device further includes an optical signal providing component and a beam splitting mirror component. The N ports are also located on the transmission output optical path of the filtering mirror. The optical signal providing component is configured to output multiple beams of modulated optical signals. The beam splitting mirror component is configured to combine the multiple beams of modulated optical signals into one combined optical signal, divide the combined optical signal into N beams of fourth optical signals according to power, input the N beams of fourth optical signals to the filtering mirror. The filtering mirror is further configured to transmit the N beams of fourth optical signals to the N ports. The N ports are also configured to output the N beams of fourth optical signals.

[0023] In the solution shown in the present disclosure, when the optical transceiver device is implemented through a spatial optical path, the optical transceiver device includes an optical signal providing component and a beam splitting mirror component. The optical signal providing component outputs modulated optical signals of multiple wavelengths. After combining the modulated optical signals of multiple wavelengths into one beam, the beam splitting mirror component divides them into N beams of optical signals and outputs them respectively, so that the optical transceiver device supports the sharing of multiple passive optical networks.

[0024] In an alternative manner, the N first optical signal beams include one or two optical signals of a 50 Gigabit Passive Optical Network (50G PON), a 10-gigabit passive optical network (XG PON), a 10-gigabit Symmetric passive optical network (XG PON), or a gigabit passive optical network (GPON).

[0025] In a second aspect, the present disclosure provides an optical transceiver device, comprising at least one signal transmission component, a receiving optical splitting component, and N ports, where N is greater than 1. The signal transmission component includes a light source and a modulation optical splitting module. The light source is connected to the modulation optical splitting module, the modulation optical splitting module is connected to the receiving optical splitting component, and the receiving optical splitting component is connected to each port. The light source is configured to output a second optical signal. The modulation optical splitting module is configured to receive the second optical signal, perform data modulation processing on the second optical signal to obtain N third optical signal beams, and input the N third optical signal beams to the receiving optical splitting component. The N third optical signal beams include at least one in-phase signal beam and / or at least one anti-phase signal beam. The receiving optical splitting component is configured to multiplex the third optical signal beams from at least one signal transmission component to obtain N optical signal beams, and output the N optical signal beams to the N ports. The N ports are configured to output the N optical signal beams.

[0026] In a third aspect, the present disclosure provides an optical transceiver device, comprising a first optical multiplexer / demultiplexer, a second optical multiplexer / demultiplexer, a first port, a second port, at least one detector, and at least one first optical switch. The first optical multiplexer / demultiplexer is located between the first port and each detector, and the second optical multiplexer / demultiplexer is located between the second port and each detector. A first optical switch is provided between the second optical multiplexer / demultiplexer and each detector. When the optical fiber link between the first port and the transmitting end is not faulty, the first optical multiplexer / demultiplexer is configured to receive the first optical signal input from the first port, demultiplex the first optical signal, and output it to the detector corresponding to the wavelength. The second optical multiplexer / demultiplexer is configured to receive the first optical signal input from the second port, demultiplex the first optical signal, and output it to the first optical switch connected to the detector corresponding to the wavelength. At least one first optical switch is configured to input the received optical signal to the connected detector when the optical fiber link between the first port and the transmitting end is faulty, and disconnect when the optical fiber link between the first port and the transmitting end is not faulty. The detector is configured to convert the received optical signal into an electrical signal.

[0027] In the solution shown in the present disclosure, when the optical transceiver device includes two ports, the two ports can be made into redundant backup ports. When a fiber optic link between one port of the optical transceiver device and the sending end fails, the fiber optic link between the other port and the sending end can still be used to receive optical signals, so that the protection switching function can be realized by using one optical transceiver device, reducing the protection switching cost.

[0028] In an alternative manner, the optical transceiver device further includes at least one signal sending component. The signal sending component includes a light source, a modulation and splitting module, and a second optical switch. The modulation and splitting module is connected to the first multiplexer / demultiplexer. The second optical switch is located between the modulation and splitting module and the second multiplexer / demultiplexer. The wavelengths of the optical signals output by different signal sending components are different. The light source is connected to the modulation and splitting module. The modulation and splitting module is respectively connected to the second optical switch and the first multiplexer / demultiplexer. The second optical switch is connected to the second multiplexer / demultiplexer. The light source is used to output a second optical signal. The modulation and splitting module is used to receive the second optical signal, perform data modulation and splitting processing on the second optical signal to obtain two optical signals, and output them to the first multiplexer / demultiplexer and the second optical switch respectively. The two optical signals include a positive-phase signal and a negative-phase signal. The first multiplexer / demultiplexer is further used to multiplex the optical signals from at least one signal sending component and output them to the first port. The first port is further used to output the received optical signals. When a fiber optic link between the first port and the receiving end fails, the second optical switch inputs the received optical signals to the second multiplexer / demultiplexer. The second multiplexer / demultiplexer multiplexes the optical signals from at least one signal sending component and outputs them to the second port. The second port outputs the received optical signals. The second optical switch is disconnected when the fiber optic link between the first port and the receiving end is not faulty.

[0029] In the solution shown in the present disclosure, when the optical transceiver device includes two ports, the two ports can be made into redundant backup ports. When a fiber optic link between one port of the optical transceiver device and the receiving end fails, the fiber optic link between the other port and the receiving end can still be used to receive optical signals, so that the protection switching function can be realized by using one optical transceiver device, reducing the protection switching cost.

[0030] In an alternative manner, when the optical transceiver device is applied to an optical network terminal, the first port and the second port are used to connect different ODNs. When the optical transceiver device is applied to an optical line terminal, the first port and the second port are used to connect the same ODN.

[0031] Fourthly, the present disclosure provides a service board, which includes the optical transceiver device in the first aspect or the optional manner of the first aspect. The single board includes a plurality of optical fiber connectors and a first slot. The optical transceiver device is plugged into the first slot, and the first slot is connected to the plurality of optical fiber connectors. The optical fiber connectors are used to connect to the ODN. The plurality of optical fiber connectors are configured to receive multiple uplink optical signals from multiple ODNs, input the multiple uplink optical signals to the optical transceiver device through the first slot. The optical transceiver device is configured to convert the multiple uplink optical signals into electrical signals. The optical transceiver device is further configured to input multiple downlink optical signals to the plurality of optical fiber connectors through the first slot. The plurality of optical fiber connectors are further configured to output the multiple downlink optical signals to the multiple ODNs.

[0032] In the solution shown in the present disclosure, the optical transceiver device can be applied to the service board to provide the function of receiving and transmitting signals for the service board.

[0033] In an optional manner, the service board further includes an optical switch, a second slot and a backup optical transceiver device. Two input ports of the optical switch are respectively connected to the first slot and the second slot, and the output port is connected to the first optical fiber connector among the plurality of optical fiber connectors. The backup optical transceiver device is plugged into the second slot. The first optical fiber connector is configured to input a received uplink optical signal to the optical switch. When the ODN connected to the first optical fiber connector shares resources with the ODNs connected to other optical fiber connectors, the optical switch inputs an uplink optical signal to the optical transceiver device through the first slot. When the ODN connected to the first optical fiber connector does not share resources with the ODNs connected to other optical fiber connectors, the optical switch inputs an uplink optical signal to the backup optical transceiver device through the second slot. The backup optical transceiver device converts an uplink optical signal into an electrical signal.

[0034] In the solution shown in the present disclosure, the service board further includes an optical switch, a second slot and a backup optical transceiver device. The backup optical transceiver device is plugged into the second slot, and the optical switch can dynamically adjust whether the ODN shares the receiving resources.

[0035] In an optional manner, when the ODN connected to the first optical fiber connector shares resources with the ODNs connected to other optical fiber connectors, the optical transceiver device inputs a downlink optical signal from the multiple downlink optical signals to the optical switch through the first slot. When the ODN connected to the first optical fiber connector does not share resources with the ODNs connected to other optical fiber connectors, the backup optical transceiver device inputs a downlink optical signal to the optical switch through the second slot. The optical switch is further configured to input a downlink optical signal to the first optical fiber connector.

[0036] In the solution shown in the present disclosure, the service board further includes an optical switch, a second slot and a backup optical transceiver device. The backup optical transceiver device is plugged into the second slot, and the optical switch can dynamically adjust whether the ODN shares the transmitting resources.

[0037] In a fifth aspect, the present disclosure provides a communication device, including a service board in the fourth aspect or an optional manner of the fourth aspect.

[0038] In a sixth aspect, the present disclosure provides a communication system, including the communication device provided in the fifth aspect, a plurality of ODNs, and a plurality of ONUs, or including the communication device provided in the fifth aspect, a plurality of ODNs, and a plurality of ONTs, or including the communication device provided in the fifth aspect, a plurality of ODNs, a plurality of ONUs, and a plurality of ONUs. Description of the Drawings

[0039] Figure 1 is a schematic diagram of the connection of optical transceiver devices in the traditional solution;

[0040] Figure 2 is a schematic diagram of an optical transceiver device connecting two ODNs provided by an exemplary embodiment of the present disclosure;

[0041] Figure 3 is a schematic diagram of the structure of an optical transceiver device provided by an exemplary embodiment of the present disclosure;

[0042] Figure 4 is another schematic diagram of the structure of an optical transceiver device provided by an exemplary embodiment of the present disclosure;

[0043] Figure 5 is still another schematic diagram of the structure of an optical transceiver device provided by an exemplary embodiment of the present disclosure;

[0044] Figure 6 is still another schematic diagram of the structure of an optical transceiver device provided by an exemplary embodiment of the present disclosure;

[0045] Figure 7 is still another schematic diagram of the structure of an optical transceiver device provided by an exemplary embodiment of the present disclosure;

[0046] Figure 8 is a schematic diagram of a structure of an optical transceiver device implemented using a spatial optical path provided by an exemplary embodiment of the present disclosure;

[0047] Figure 9 is another schematic diagram of a structure of an optical transceiver device implemented using a spatial optical path provided by an exemplary embodiment of the present disclosure;

[0048] Figure 10 is a schematic diagram of redundant backup provided by an exemplary embodiment of the present disclosure;

[0049] Figure 11 is another schematic diagram of redundant backup provided by an exemplary embodiment of the present disclosure;

[0050] Figure 12It is a schematic structural diagram of an optical transceiver device in an ONU provided by an exemplary embodiment of the present disclosure;

[0051] Figure 13 It is a schematic structural diagram of a service board provided by an exemplary embodiment of the present disclosure;

[0052] Figure 14 It is another schematic structural diagram of a service board provided by an exemplary embodiment of the present disclosure;

[0053] Figure 15 It is still another schematic structural diagram of a service board provided by an exemplary embodiment of the present disclosure. Detailed implementation manners

[0054] To make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0055] Currently, in a passive optical network, an OLT includes at least one service board, and the service board is also referred to as a service card. Each service board plugs in multiple optical transceiver devices, and each optical transceiver device includes a port, and this port is used to connect an ODN, and this ODN connects multiple ONUs and / or ONTs. See Figure 1 . With the continuous improvement of network rate and scale, each service board needs to have multiple optical transceiver devices to support a sufficient number of ODNs, which will result in a relatively large power consumption, relatively large heat dissipation pressure and high energy consumption of each service board. Moreover, in some passive optical networks, the number of ONUs and / or ONTs connected to each ODN is not large, so a small number of ONUs and / or ONTs share the bandwidth of one optical transceiver device, which will also cause waste of bandwidth resources. Moreover, when one optical transceiver device includes one port, if it is necessary to implement the fiber link backup function between the optical transceiver device and the ODN, then at least two optical transceiver devices are required.

[0056] Based on this, the embodiments of the present disclosure provide an optical transceiver device, and this optical transceiver device can provide multiple ports, and the multiple ports are used to connect multiple ODNs, so that multiple ODNs share the resources of one optical transceiver device. For example, see Figure 2 , one optical transceiver device provides two ports, and the two ports are respectively connected to ODN1 and ODN2. Moreover, the number of optical transceiver devices plugged in each service board will be reduced, reducing the power consumption of the service board and the heat dissipation pressure. Moreover, when implementing the fiber link backup function between the optical transceiver device and the ODN, only one optical transceiver device is required.

[0057] To better understand the embodiments of the present disclosure, first, the system architecture of the embodiments of the present disclosure will be described. The PON system includes an OLT, multiple ODNs, and multiple ONUs. The OLT includes service boards, and optical transceiver devices are plugged into the service boards. Each optical transceiver device is connected to multiple ODNs, and each ODN is connected to multiple ONUs. The types of the ONUs among the multiple ONUs are the same, or there are ONUs with different types. For example, each ONU is an ONU of 50G PON, 10-gigabit passive optical network (XG PON), 10-gigabit Symmetric passive optical network (XG PON), or gigabit passive optical network (GPON). For another example, among the multiple ONUs, there are at least two types of ONUs, such as ONUs of 50G PON, XG PON, XGS PON, and GPON. Here, the ONU is taken as an example for illustration. The PON system may also include an ONT, or include an OLT, multiple ODNs, and multiple ONTs.

[0058] In the embodiments of the present disclosure, the optical transceiver device is a pluggable device, which can also be understood as an optical module.

[0059] Figure 3 A schematic structural diagram of an optical transceiver device is provided. Refer to Figure 3 , the optical transceiver device includes N ports, a receiving beam splitting component, and at least one first detector, where N is greater than 1. The N ports are used to be connected to N ODNs one by one. Different ports are connected to different ODNs through optical fibers. The ports can also be referred to as the first optical interfaces or the first PON ports. The first detector is a single-wavelength detector for detecting optical signals of a single wavelength. When each first detector provides a sufficient number of input ports, the number of at least one first detector is the same as the number of wavelengths of the received optical signals. For example, if the ODNs connected to the optical transceiver device send optical signals of three wavelengths, at least one first detector includes three first detectors, and different detectors among the three first detectors are used to convert optical signals of different wavelengths into electrical signals. In Figure 3 , the case of including two ports is shown. When the number of input ports provided by each first detector is limited, at least two input ports can be provided at least. Then, the optical signals of the same wavelength among the optical signals received by at least two ports are sent to the same first detector. For example, if the optical transceiver device includes 4 ports and the first detector provides two input ports, and all 4 ports input optical signals of the first wavelength, then two first detectors of the first wavelength are required for reception.

[0060] Each port receives a first optical signal beam. N ports receive N first optical signal beams and input the N first optical signal beams into the receiving optical splitting component. The receiving optical splitting component receives the N first optical signal beams. For each first optical signal beam, if the first optical signal beam is a multi-wavelength optical signal, the first optical signal beam is split into optical signals of multiple wavelengths and output to the first detector corresponding to the wavelength. If the first optical signal beam is a single-wavelength optical signal, it is directly output to the first detector corresponding to the wavelength. At least one first detector converts the received optical signal into an electrical signal. For example, the N ports include a first port and a second port. At least one first detector includes a detector of a first wavelength and a detector of a second wavelength. The first port receives a first optical signal beam, and the second port receives a first optical signal beam. Each first optical signal beam includes an optical signal of a first wavelength and an optical signal of a second wavelength. The optical signals of the first wavelength are all sent to the first detector of the first wavelength and converted into electrical signals. The optical signals of the second wavelength are all sent to the first detector of the second wavelength and converted into electrical signals. In this way, one detector can receive optical signals from multiple ports, enabling the ODNs connected to multiple ports to share the receiving resources.

[0061] In an alternative manner, the receiving optical splitting component includes N optical multiplexers / demultiplexers. If the number of input ports of the first detector is greater than or equal to the number of optical multiplexers / demultiplexers, each optical multiplexer / demultiplexer is connected to one of the N ports and is connected to all the first detectors. Different optical multiplexers / demultiplexers are connected to different ports. Each port inputs a first optical signal beam into the connected optical multiplexer / demultiplexer. Each optical multiplexer / demultiplexer receives a first optical signal beam. If the first optical signal beam is a multi-wavelength optical signal, the first optical signal beam is split into optical signals of multiple wavelengths and output to the first detector corresponding to the wavelength. If the first optical signal beam is a single-wavelength optical signal, it is directly output to the first detector corresponding to the wavelength. If the number of input ports of the first detector is less than the number of optical multiplexers / demultiplexers, then the optical multiplexers / demultiplexers are connected to some of the first detectors.

[0062] Optionally, each optical multiplexer / demultiplexer includes a multiplexing port and at least one demultiplexing port. The multiplexing port is connected to one of the N ports through a waveguide. The number of at least one demultiplexing port is the same as the number of at least one first detector. Each demultiplexing port is connected to a first detector through a waveguide. Different demultiplexing ports are connected to different first detectors. The wavelengths of the optical signals output from different demultiplexing ports are different.

[0063] Optionally, the optical multiplexer / demultiplexer is a waveguide type wavelength division multiplexing (WDM).

[0064] In an alternative manner, see Figure 3, the optical transceiver device is a transceiver integrated device and also has a transmission function. The optical transceiver device further includes at least one signal transmission component, and each signal transmission component includes a light source and a modulation and splitting module. The wavelengths of the optical signals output by different signal transmission components are different. In each signal transmission component, the light source is connected to the modulation and splitting module, and the modulation and splitting module is connected to the receiving and splitting component.

[0065] Among them, in one signal transmission component, the light source is a laser. The light source outputs an optical signal for modulating data, which is called the second optical signal. The modulation and splitting module receives the second optical signal. The modulation and splitting module performs data modulation processing on the second optical signal to obtain N third optical signals. The N third optical signals include at least one in-phase signal and / or at least one anti-phase signal. The modulation and splitting module inputs the N third optical signals to the receiving and splitting component. When at least one signal transmission component includes multiple signal transmission components, the receiving and splitting component will receive the N third optical signals input by each signal transmission component. The receiving and splitting component multiplexes the received third optical signals to obtain N optical signals, and inputs one optical signal to each port. The optical signals input to different ports are different. When at least one signal transmission component includes one signal transmission component, the receiving and splitting component will receive N third optical signals. The receiving and splitting component inputs one optical signal to each port. The optical signals input to different ports are different. Each of the N ports outputs one received optical signal. Here, for each of the N optical signals, if the optical signal comes from multiple signal transmission components, the optical signal is an in-phase optical signal. For example, they are all in-phase signals or all anti-phase signals.

[0066] The modulation and splitting module has various structures, and three structures are provided here. Refer to Figure 4 the shown optical transceiver device, the modulation and splitting module includes a first modulator. Figure 4 As shown in, N is 2. The optical transceiver device includes two ports. The receiving and splitting component includes two multiplexers / demultiplexers, and the two multiplexers / demultiplexers include a first multiplexer / demultiplexer and a second multiplexer / demultiplexer. The optical transceiver device is applied to 50G PON and XG PON. At least one first detector includes two first detectors. One first detector receives the optical signal of 50G PON, and the other first detector receives the optical signal of XG PON. At least one signal transmission component includes two signal transmission components. One signal transmission component is used to transmit the optical signal of 50G PON, and the other signal transmission component is used to transmit the optical signal of XG PON. In each signal transmission component, the light source is connected to the input port of the first modulator. One output port of the first modulator is connected to the first multiplexer / demultiplexer, and the other output port is connected to the second multiplexer / demultiplexer. The first multiplexer / demultiplexer is connected to one port, and the second multiplexer / demultiplexer is connected to the other port.

[0067] Among them, in each signal transmission component, a light source inputs a second optical signal to a first modulator, and the first modulator performs data modulation processing on the second optical signal to obtain a beam of in-phase signal and a beam of anti-phase signal. The first modulator inputs the in-phase signal to a first multiplexer / demultiplexer and inputs the anti-phase signal to a second multiplexer / demultiplexer. The first multiplexer / demultiplexer receives the in-phase signals sent by at least one signal transmission component, multiplexes the received in-phase signals to obtain a beam of optical signal, and outputs it to the connected port. The second multiplexer / demultiplexer receives the anti-phase signals sent by at least one signal transmission component, multiplexes the received anti-phase signals to obtain a beam of optical signal, and outputs it to the connected port. The optical signals received at the two ports are outputted.

[0068] Alternatively, referring to Figure 5 the optical transceiver device shown in Figure 5 shows the case where N is equal to 4 and there is one signal transmission component. The modulation and splitting module includes a first modulator, a first optical splitter, and a second optical splitter. One output port of the first modulator is connected to the first optical splitter, and the other output port is connected to the second optical splitter. Both the first optical splitter and the second optical splitter are power equal splitters. The receiving and splitting component includes 4 multiplexer / demultiplexers. The first modulator performs data modulation processing on the second optical signal to obtain a beam of in-phase signal and a beam of anti-phase signal. The in-phase signal is input to the first optical splitter and is split into two beams of in-phase signals. The anti-phase signal is input to the second optical splitter and is split into two beams of anti-phase signals. The first optical splitter inputs two beams of in-phase signals to two multiplexer / demultiplexers, and different multiplexer / demultiplexers receive different in-phase signals. The second optical splitter inputs two beams of anti-phase signals to the other two multiplexer / demultiplexers, and different multiplexer / demultiplexers receive different anti-phase signals. Each multiplexer / demultiplexer outputs the input beam of optical signal to the connected port.

[0069] Alternatively, the modulation and splitting module includes a first modulator and a first optical splitter. The principle of this structure is the same as that of Figure 5 shown, and will not be elaborated here.

[0070] Optionally, when N is equal to 2, the optical transceiver device is connected to two ODNs, and it is also possible to dynamically adjust whether the two ODNs share modulation resources according to actual needs. For example, when the number of ONUs connected to one of the ODNs exceeds the target threshold, the two ODNs do not share modulation resources. When the number of ONUs connected to one of the ODNs does not exceed the target threshold, the two ODNs share modulation resources.

[0071] In at least one signal transmission component, the signal transmission components that can dynamically adjust whether to share modulation resources are all called first signal transmission components, which can be all the signal transmission components in at least one signal transmission component, or some of the signal transmission components. Referring to Figure 6, the first signal transmitting component further includes a variable optical splitter, a second modulator, and a first optical switch. The input port of the variable optical splitter is connected to the light source. One output port of the variable optical splitter is connected to the first modulator, and the other output port is connected to the second modulator. The first optical switch is a 2*1 optical switch. One input port of the first optical switch is connected to the first modulator, and the other input port is connected to the second modulator. The output port is connected to the second optical multiplexer / demultiplexer. Figure 6 The optical transceiver device shown in Figure 6 transmits optical signals of two wavelengths and receives optical signals of two wavelengths.

[0072] When two ODNs share the resources of the first signal transmitting component, the variable optical splitter receives the second optical signal transmitted by the light source and inputs the second optical signal to the first modulator. The first modulator performs data modulation processing on the second optical signal to obtain a beam of in-phase signal and a beam of anti-phase signal, outputs a beam of in-phase signal to the first optical multiplexer / demultiplexer, and inputs a beam of anti-phase signal to the first optical switch. The first optical switch inputs a beam of anti-phase signal to the second optical multiplexer / demultiplexer. The first optical multiplexer / demultiplexer receives the in-phase signals transmitted by at least one signal transmitting component, multiplexes the received in-phase signals, obtains a beam of optical signal, and outputs it to the connected port. The second optical multiplexer / demultiplexer receives the anti-phase signals transmitted by at least one signal transmitting component, multiplexes the received anti-phase signals, obtains a beam of optical signal, and outputs it to the connected port. The two ports output the received optical signals. In this way, both of the two ODNs are obtained by modulating data using the first modulator, sharing the resources of the first modulator, and the second modulator can be turned off to save power consumption.

[0073] When the two ODNs do not share the resources of the first signal transmission component, the variable optical splitter receives the second optical signal sent by the light source, divides the second optical signal into two optical signals with the same power, inputs one optical signal to the first modulator, and inputs the other optical signal to the second modulator. The first modulator performs data modulation processing on this one optical signal to obtain a positive-phase signal and outputs this one positive-phase signal to the first optical multiplexer / demultiplexer. The second modulator performs data modulation processing on this one optical signal to obtain a negative-phase signal and inputs this one negative-phase signal to the first optical switch. The first optical switch inputs this one negative-phase signal to the second optical multiplexer / demultiplexer. The first optical multiplexer / demultiplexer receives the positive-phase signals sent by at least one signal transmission component, multiplexes the received positive-phase signals to obtain an optical signal, and outputs it to the connected port. The second optical multiplexer / demultiplexer receives the negative-phase signals sent by at least one signal transmission component, multiplexes the received negative-phase signals to obtain an optical signal, and outputs it to the connected port. The two ports output the received optical signals. In this way, the two ODNs respectively use the first modulator and the second modulator to modulate data, without sharing the resources of the modulator. Here, the first modulator can also input a negative-phase signal to the first optical switch, but the first optical switch only outputs the negative-phase signal from the second modulator and does not output the negative-phase signal from the first modulator.

[0074] It should be noted that the optical transceiver device further includes a controller, or is further connected to a controller. When dynamically adjusting whether the two ODNs share modulation resources, the controller determines the number of ONUs connected to each ODN, judges the magnitude relationship between this number and the target threshold. If the number of ONUs connected to an ODN is greater than or equal to the target threshold, it is determined that the two ODNs do not share the resources of the first signal transmission component, otherwise it is determined that the two ODNs share the resources of the first signal transmission component. The controller realizes the dynamic adjustment function by controlling the variable optical splitter and the first optical switch.

[0075] Optionally, the first modulator and the second modulator are interferometric modulators, and the interferometric modulators include but are not limited to Mach-Zehnder modulators or micro-ring modulators, etc. The interferometric modulator can output a positive-phase signal and a negative-phase signal with the same power and opposite phases. For example, this one positive-phase signal is represented as 101010, and this one negative-phase signal is represented as 010101.

[0076] Optionally, the optical transceiver device can also dynamically adjust whether the two ODNs share reception resources according to actual needs. For example, when the number of ONUs connected to the ODN exceeds the target threshold, the two ODNs do not share reception resources, and when the number of ONUs connected to the ODN does not exceed the target threshold, the two ODNs share reception resources.

[0077] See Figure 6, the optical transceiver device further includes a second detector corresponding to a first wavelength and a second optical switch. The first wavelength belongs to the wavelengths of the optical signals detected by at least one first detector. The second detector is a single-wavelength detector, and the second optical switch is a 1*2 optical switch. Any wavelength corresponding to the second detector and the second optical switch is referred to as the first wavelength. The specific number of second detectors is set according to actual needs. For example, at least one first detector includes 3 first detectors, which are respectively used to detect optical signals of wavelength A, wavelength B, and wavelength C. Wavelength A, wavelength B, and wavelength C respectively correspond to second detectors, indicating that the receiving resources of each wavelength are shared by N ODNs. The receiving optical splitting component includes a first multiplexer / demultiplexer and a second multiplexer / demultiplexer. Figure 6 shows that the optical transceiver device receives optical signals of wavelength A and wavelength B.

[0078] For the first wavelength, the demultiplexing port of the first multiplexer / demultiplexer is connected to the first detector through a waveguide. The input port of the second optical switch is connected to the second multiplexer / demultiplexer through a waveguide. One output port is connected to the first detector through a waveguide, and the other output port is connected to the second detector through a waveguide.

[0079] The first multiplexer / demultiplexer receives a beam of first optical signals and inputs the optical signal of wavelength A in the beam of first optical signals to the first detector. The second multiplexer / demultiplexer receives a beam of first optical signals and inputs the optical signal of wavelength A in the beam of first optical signals to the second optical switch. When two ODNs share the receiving resources corresponding to wavelength A, the second optical switch inputs the received optical signal to the connected first detector. The first detector converts the received optical signal into an electrical signal. When two ODNs do not share the receiving resources corresponding to wavelength A, the second optical switch inputs the received optical signal to the second detector. The second detector converts the received optical signal into an electrical signal. The reception situation of the optical signal of wavelength B is similar to that of the optical signal of wavelength A, and will not be elaborated here.

[0080] It should be noted that the optical transceiver device further includes a controller, or is further connected to a controller. When dynamically adjusting whether two ODNs share receiving resources, the controller is used to control the second optical switch to implement the dynamic adjustment function.

[0081] Optionally, both the first detector and the second detector are waveguide detectors. One waveguide detector has at least two input ports, both of which can receive optical signals. The more input ports, the more ODNs can share the receiving resources without additional cost.

[0082] Optionally, multiple ports of the optical transceiver device are time-division multiplexed. See Figure 7, the optical transceiver device further includes a signal transmission component, which includes a light source, a third modulator, and a third optical switch. The light source is connected to the third modulator, the third modulator is connected to the third optical switch, and the third optical switch is respectively connected to N multiplexers / demultiplexers.

[0083] The light source inputs a second optical signal to the third modulator. The third modulator performs data modulation processing on the second optical signal to obtain an inverted signal or a non-inverted signal. The third modulator inputs a non-inverted signal to the third optical switch, and the third optical switch outputs the non-inverted signal to the target multiplexer / demultiplexer. The target multiplexer / demultiplexer outputs the received optical signal to the connected port. Alternatively, the third modulator inputs an inverted signal to the third optical switch, and the third optical switch outputs the inverted signal to the target multiplexer / demultiplexer, where the target multiplexer / demultiplexer is the multiplexer / demultiplexer connected to the port in the current usage time period. Among them, the target multiplexer / demultiplexer outputs the received optical signal to the connected port. The target multiplexer / demultiplexer inputs the received optical signal to the connected port, and each port outputs the received optical signal. In this way, through the switching of the third optical switch, the multiple ODNs connected to the optical receiving device can be time-division multiplexed.

[0084] Optionally, the third optical switch is a fast optical switch, which can achieve fast switching.

[0085] Optionally, the third modulator is the interference modulator described above.

[0086] It should be noted that the optical transceiver device further includes a controller, or is also connected to a controller, which is used to control the third optical switch to output the optical signal to the target multiplexer / demultiplexer.

[0087] In an optional manner, each light source in the optical transceiver device is a chip, and other parts are integrated on one chip.

[0088] In an optional manner, the optical transceiver device can be implemented using a spatial optical path. Assume that the optical transceiver device can receive optical signals of M wavelengths. At least one first detector includes M first detectors, and the receiving optical splitting component includes a filter mirror and M demultiplexing modules. N ports are located on the reflected input optical path of the filter mirror, and the M demultiplexing modules correspond to the M first detectors one by one. The M demultiplexing modules are arranged in sequence. The first demultiplexing module is located on the optical path between the filter mirror and the first first detector and on the reflected output optical path of the filter mirror. The i-th demultiplexing module is located on the optical path between the (i - 1)-th demultiplexing module and the i-th first detector, and the i-th demultiplexing module is adjacent to the (i + 1)-th demultiplexing module.

[0089] The filtering mirror receives N first optical signals and reflects the N first optical signals to the first demultiplexing module. The first demultiplexing module receives the N first optical signals. For the j-th demultiplexing module among the first to the (M - 1)-th demultiplexing modules, the optical signals belonging to the corresponding first detector among the N received optical signals are output to the corresponding first detector of the j-th demultiplexing module, and the other optical signals are output to the (j + 1)-th demultiplexing module. The M-th demultiplexing module reflects and outputs the N received optical signals to the corresponding first detector.

[0090] Optionally, the filtering mirror is a single filtering mirror, or the filtering mirror includes N sub-filtering mirrors. The N sub-filtering mirrors correspond one-to-one with N ports. Each port is located on the reflected input optical path of one sub-filtering mirror and on the transmitted output optical path of the one sub-filtering mirror. The following takes the filtering mirror including N sub-filtering mirrors as an example for illustration.

[0091] Optionally, referring to Figure 8 , the first demultiplexing module receives N first optical signals, transmits and outputs the optical signals belonging to the corresponding first detector among the N first optical signals to the corresponding first detector, and reflects and outputs the other optical signals to the second demultiplexing module. For each demultiplexing module from the second demultiplexing module to the (M - 1)-th demultiplexing module, this demultiplexing module reflects and outputs the optical signals belonging to the corresponding first detector among the N received optical signals to the corresponding first detector, and transmits and outputs the other optical signals to the next demultiplexing module. The M-th demultiplexing module reflects and outputs the N received optical signals to the corresponding first detector.

[0092] Or, referring to Figure 9 , the first demultiplexing module receives N first optical signals, reflects and outputs the optical signals belonging to the corresponding first detector among the N first optical signals to the corresponding first detector, and transmits and outputs the other optical signals to the second demultiplexing module. For each demultiplexing module from the second demultiplexing module to the (M - 1)-th demultiplexing module, this demultiplexing module reflects and outputs the optical signals belonging to the corresponding first detector among the N received optical signals to the corresponding first detector, and transmits and outputs the other optical signals to the next demultiplexing module. The M-th demultiplexing module reflects and outputs the N received optical signals to the corresponding first detector. In Figure 8 and Figure 9 , an example is given of transmitting optical signals of two wavelengths (wavelength 1 and wavelength 2) and receiving optical signals of two wavelengths (wavelength C and wavelength D).

[0093] Optionally, each demultiplexing module includes a demultiplexing mirror and a focusing lens. The M focusing lenses correspond one-to-one with the M first detectors, and the M focusing lenses are located on the optical paths between the M demultiplexing mirrors and the M first detectors. For each demultiplexing mirror in the 1st to the (M - 1)th demultiplexing modules, the optical signals belonging to the corresponding first detector among the received N optical signals are output to the corresponding focusing lens, and the other optical signals are output to the demultiplexing mirror of the next demultiplexing module. The demultiplexing mirror in the Mth demultiplexing module reflects and outputs the received N optical signals to the corresponding focusing lens. Each focusing lens focuses the input N optical signals and outputs them to the corresponding first detector.

[0094] Optionally, in order to enable the first detector to receive multiple optical signals, the first detector is a "surface incidence type" detector, and the optical signals of the same wavelength from different ports are incident on different position points of the first detector, but the distance is relatively close.

[0095] In an optional manner, when the last first detector and other detectors are not in the same row or the same column, the last demultiplexing module does not include a reflector, which is equivalent to the demultiplexing mirror in the penultimate demultiplexing module directly transmitting the optical signal to the last first detector.

[0096] In an optional manner, when the optical transceiver device is implemented using a spatial optical path, it also has the function of transmitting optical signals. The optical transceiver device further includes an optical providing component and a beam splitting mirror component. The beam splitting mirror component is located on the output optical path of the optical providing component, and the filtering mirror is located on the output optical path of the beam splitting mirror component. The optical providing component outputs multiple modulated optical signals, and each modulated optical signal is modulated with data, and the wavelengths of the multiple modulated optical signals are different. For example, the optical providing component includes multiple light sources and multiple modulators, each light source is a laser light source, and the modulator uses an electro absorption modulated lasers (EML) modulator, which is an electro absorption type modulator. The beam splitting mirror component combines the multiple modulated optical signals into a combined optical signal, divides the combined optical signal into N fourth optical signals according to power, the powers of the N fourth optical signals are the same, and outputs the N fourth optical signals to the filtering mirror. The filtering mirror receives the N fourth optical signals, and the filtering mirror transmits and outputs the N fourth optical signals to the corresponding ports. Each port outputs one fourth optical signal. In this way, using the spatial optical path enables multiple modulated optical signals to be sent to multiple ODNs simultaneously.

[0097] Optionally, the beam splitter assembly includes a multiplexer, N - 1 beam splitters, and a reflector. Here, it is assumed that there are two modulated optical signals among the multiple modulated optical signals, and N equals 3. The N - 1 beam splitters include a first beam splitter and a second beam splitter. The filter includes a first sub - filter, a second sub - filter, and a third sub - filter. The two modulated optical signals are combined by the multiplexer to obtain a combined optical signal, which is output to the first beam splitter. The first beam splitter divides the combined optical signal into two optical signals. One optical signal is a fourth optical signal, and the other optical signal is equal to the sum of the powers of the two fourth optical signals. The first beam splitter transmits the fourth optical signal to the first sub - filter and reflects the other optical signal to the second beam splitter. The first sub - filter transmits and outputs the fourth optical signal. The second beam splitter divides the other optical signal into two fourth optical signals, transmits one fourth optical signal to the second sub - filter, and reflects the other fourth optical signal to the reflector. The second sub - filter transmits and outputs the fourth optical signal. The reflector reflects the other fourth optical signal to the third sub - filter. The third sub - filter transmits and outputs the received fourth optical signal.

[0098] Among them, when there are three or more modulated optical signals, there are multiple multiplexers. The first multiplexer combines two of the modulated optical signals to obtain a first combined optical signal. The second multiplexer combines the first combined optical signal with another modulated optical signal to obtain a second combined optical signal. In this way, until all the multiple modulated optical signals are combined into one combined optical signal.

[0099] It should be noted that when the optical transceiver device is implemented using a spatial optical path, since beam splitting is required when transmitting optical signals, there will be certain losses.

[0100] It should also be noted that when the optical supply component outputs an optical signal of one wavelength, the beam splitting component includes N - 1 beam splitters and a reflector.

[0101] In the previous text, the optical transceiver device includes multiple ports, and the multiple ports are connected to different ODNs. In another embodiment, the optical transceiver device is applied to an OLT. When the optical transceiver device includes two ports, the two ports are used to connect to the same ODN to provide a redundant backup function for the one ODN. The two ODNs include two input ports. One input port is connected to one port of the optical transceiver device, and the other input port is connected to the other port of the optical transceiver device. See Figure 10 .

[0102] In Figure 10In the optical transceiver device, there are two ports, a first multiplexer / demultiplexer, a second multiplexer / demultiplexer, P first optical switches, P detectors, and P signal transmitting components, where P is greater than or equal to 1. Among them, the two ports include a first port and a second port. The first port is connected to the first multiplexer / demultiplexer, and the second port is connected to the second multiplexer / demultiplexer. The first multiplexer / demultiplexer is connected to each detector, and a first optical switch is provided on the optical path between the second multiplexer / demultiplexer and each detector. The P detectors are all single-wavelength detectors. Different signal transmitting components are used to transmit optical signals of different wavelengths. For each signal transmitting component, the signal transmitting component includes a light source, a modulator, and a second optical switch. The light source is connected to the input port of the modulator. Among the two output ports of the modulator, one output port is connected to the first multiplexer / demultiplexer, and the other output port is connected to the second optical switch, and the second optical switch is connected to the second multiplexer / demultiplexer.

[0103] When the optical fiber link between the first port and the ODN is not disconnected, the first optical switch between the second multiplexer / demultiplexer and each detector is in the off state. The ODN sends a first optical signal to both the first port and the second port, and the first port inputs the first optical signal to the first multiplexer / demultiplexer. The first multiplexer / demultiplexer divides the first optical signal into optical signals of multiple wavelengths and outputs them to the corresponding detectors. The second port inputs the first optical signal to the second multiplexer / demultiplexer. However, since the first optical switch is in the off state, each detector will only receive the optical signal from the first multiplexer / demultiplexer. The second optical switch in each signal transmitting component is in the off state. For each signal transmitting component, the light source outputs a second optical signal, and the modulator modulates the data onto the second optical signal to obtain a beam of in-phase signal and a beam of anti-phase signal. The modulator inputs the beam of in-phase signal to the first multiplexer / demultiplexer and inputs the beam of anti-phase signal to the second optical switch. After multiplexing the received in-phase signal, the first multiplexer / demultiplexer outputs it to the first port, and the first port sends the received optical signal to the ODN for downlink transmission. Since the second optical switch is in the off state, the beam of anti-phase signal will not be sent down to the ODN.

[0104] When the optical fiber link between the first port and the ODN is disconnected, the first optical switch between the second optical splitter / combiner and each detector is in the closed state. The ODN sends the first optical signal to both the first port and the second port, and the first port cannot receive the first optical signal. The second port inputs the first optical signal to the second optical splitter / combiner, which divides the first optical signal into optical signals of multiple wavelengths and outputs them to the corresponding detectors through the first optical switch. The second optical switch in each signal transmitting component is in the closed state. For each signal transmitting component, the light source outputs the second optical signal, and the modulator modulates the data onto the second optical signal to obtain a beam of in-phase signal and a beam of anti-phase signal. The modulator inputs the beam of in-phase signal to the first optical splitter / combiner and inputs the beam of anti-phase signal to the second optical switch. The second optical switch inputs the beam of anti-phase signal to the second optical splitter / combiner. After the second optical splitter / combiner combines the received anti-phase signals, it outputs them to the second port, and the second port sends the received optical signal to the ODN for downstream transmission. Since the optical fiber link between the first port and the ODN is disconnected, the ODN will only receive the optical signal sent by the second port.

[0105] Here, the modulator can also input a beam of anti-phase signal to the first optical splitter / combiner and input a beam of in-phase signal to the second optical switch.

[0106] In this way, in an optical transceiver device, there are two ports connected to the same ODN, which can protect the backbone optical fiber link between the ports of the optical transceiver device and the ODN, without the need for an additional backup module, and can save the cost of the OLT.

[0107] Optionally, Figure 10 The shown optical transceiver device can also be applied to the ONU side, so that a single ONU includes two ports, realizing native protection switching, without the need for an additional backup module, and saving the cost of the ONU.

[0108] In Figure 10 the shown solution, only the backbone optical fiber between the ports of the optical transceiver device and the ODN can be protected. If multiple ports are also set in the ONU, all the optical fiber links between the ONU and the OLT can be protected. In one solution, the ONU adopts Figure 10 the shown optical transceiver device.

[0109] See Figure 11 At the OLT side, the optical transceiver device is connected to Figure 10The difference between the optical transceiver device shown is that it does not include the first optical switch and the second optical switch. The optical transceiver device includes two ports, which are port A and port B. One of the two ports outputs a positive-phase signal, and the other port outputs a negative-phase signal. In the ONU, the optical transceiver device includes two ports, which are the first port (port A1) and the second port (port B1). There are a first ODN and a second ODN connected between the OLT and the ONU. The first ODN is respectively connected to port A1 and port A, and the second ODN is respectively connected to port B1 and port B.

[0110] See Figure 12 , in the ONU, the optical transceiver device includes two ports, a first multiplexer / demultiplexer, a second multiplexer / demultiplexer, a first optical switch, a detector, and a signal transmitting component. The signal transmitting component includes a light source, a modulator, and a second optical switch. Port A1 is connected to the first multiplexer / demultiplexer, and port B1 is connected to the second multiplexer / demultiplexer. The first multiplexer / demultiplexer is connected to the detector, the second multiplexer / demultiplexer is connected to the first optical switch, the first optical switch is connected to the detector, the light source is connected to the input port of the modulator. Among the two output ports of the modulator, one output port is connected to the first multiplexer / demultiplexer, and the other output port is connected to the second optical switch, and the second optical switch is connected to the second multiplexer / demultiplexer.

[0111] In the optical fiber link from the OLT to the ONU, the optical fiber link between port A and port A1 is not disconnected. The first optical switch and the second optical switch in the ONU are in the off state. Port A1 can perform transceiver operations, and the optical signal received by port B1 will not enter the detector. Both port A and port B on the OLT side output the first optical signal, but only the first optical signal sent by port A can be normally received. On the OLT side, port A receives the optical signal sent by the ONU. Specifically, the process of the ONU sending an optical signal to the OLT is as follows: The light source inputs the second optical signal to the modulator. The modulator modulates the data onto the second optical signal to obtain a beam of in-phase signal and a beam of anti-phase signal. It inputs a beam of in-phase signal to the first optical combiner / splitter and inputs a beam of anti-phase signal to the second optical switch. The first optical combiner / splitter inputs this beam of in-phase signal to port A1, and port A1 outputs this beam of in-phase signal. This beam of in-phase signal is transmitted through the first ODN to port A of the optical transceiver device in the OLT. The second optical switch is in the off state, and this beam of anti-phase signal will not be output from port B1. The process of the OLT sending an optical signal to the ONU is as follows: On the OLT side, both port A and port B of the optical transceiver device output the first optical signal. The two beams of the first optical signal pass through the first ODN and the second ODN respectively and enter port A1 and port B1. Port A1 inputs the first optical signal to the first optical combiner / splitter. The first optical combiner / splitter demultiplexes the first optical signal and outputs the optical signal required by the ONU to the detector. Port B1 inputs the first optical signal to the second optical combiner / splitter. The second optical combiner / splitter demultiplexes the first optical signal and outputs the optical signal required by the ONU to the first optical switch. The first optical switch is in the off state, and the optical signal received by port B1 will not enter the detector.

[0112] In the OLT-to-ONU optical fiber link, the optical fiber link between port A and port A1 is disconnected. The first optical switch and the second optical switch in the ONU are in the closed state, and port B1 can perform transceiver operations. Ports A and B on the OLT side both output the first optical signal, but only the first optical signal sent by port B can be normally received. On the OLT side, port B receives the optical signal sent by the ONU. Specifically, the process of the ONU sending an optical signal to the OLT is as follows: The light source inputs the second optical signal to the modulator. The modulator modulates the data onto the second optical signal to obtain a beam of in-phase signal and a beam of anti-phase signal. It inputs a beam of in-phase signal to the first optical splitter / combiner and inputs a beam of anti-phase signal to the second optical switch. The first optical splitter / combiner inputs this beam of in-phase signal to port A1. Since the optical fiber link from port A1 to port A is disconnected, the beam of in-phase signal output by port A1 cannot reach port A. The second optical switch is in the closed state. This beam of anti-phase signal passes through the second optical splitter / combiner and is output from port B1, and is transmitted through the second ODN to port B of the optical transceiver device in the OLT. The process of the OLT sending an optical signal to the ONU is as follows: On the OLT side, ports A and B of the optical transceiver device both output the first optical signal. Since the optical fiber link from port A1 to port A is disconnected, the first optical signal output by port A cannot reach port A1. The first optical signal output by port B passes through the second ODN and reaches port B1. Port B1 inputs the first optical signal to the second optical splitter / combiner. The second optical splitter / combiner demultiplexes the first optical signal and outputs the optical signal required by the ONU to the first optical switch. The first optical switch is in the closed state and outputs the received optical signal to the detector.

[0113] In Figure 11 and Figure 12 it is port A1 that transmits the in-phase signal and port B1 that transmits the anti-phase signal. In another way, port A1 transmits the anti-phase signal and port B1 transmits the in-phase signal.

[0114] In another solution, Figure 3 In the solution shown, the optical transceiver device is applied to the ONU and includes a first port and a second port. The number of signal transmission components is 1. At least one first detector includes one detector. The receiving optical splitting component includes two optical splitters / combiners. The first port is connected to the first ODN, and the second port is connected to the second ODN. On the OLT side, the first optical transceiver device is connected to the first ODN, and the second optical transceiver device is connected to the second ODN. In this way, when the optical fiber link between the first optical transceiver device and the ONU is fault-free, the first optical transceiver device communicates with the ONU, and the second optical transceiver device is in the off state. When the optical fiber link between the first optical transceiver device and the ONU fails, the second optical transceiver device communicates with the ONU. The first optical transceiver device and the second optical transceiver device can adopt the structure in the present disclosure or can also adopt the structure of one port. Or, on the OLT side, the optical transceiver device also adopts Figure 3In the structure shown, the optical transceiver device provides two ports. One port is connected to the first port of the ONU, and the other port is connected to the second port of the ONU. In this way, it is equivalent to having two optical fiber links between the ONU and the OLT side. When there is no fault in the optical fiber link between the ONU and the OLT side, two identical optical signals are continuously transmitted between the OLT side and the ONU, but only one of the optical signals is processed. When one of the optical fiber links between the ONU and the OLT side fails, the other optical fiber link can still be used for optical signal transmission and reception.

[0115] In this way, by adopting the above two solutions and setting two ports in the ONU, all optical fiber links between the ONU and the OLT can be protected.

[0116] It should be noted that the above is described by taking an ONU that receives and transmits optical signals of one wavelength as an example. If the ONU can process optical signals of multiple wavelengths, then the optical transceiver device includes a first port and a second port, there are multiple signal transmission components, at least one first detector includes detectors of multiple wavelengths, the receiving optical splitting component includes two optical multiplexers / demultiplexers, the first port is connected to the first ODN, and the second port is connected to the second ODN. The specific optical signal transmission process is the same as that of receiving and transmitting optical signals of one wavelength, and will not be elaborated here.

[0117] In an embodiment of the present disclosure, a service board is further provided. This service board belongs to the OLT. In this service board, the optical transceiver device is a pluggable module with the same side for optical and electrical components, that is, both the optical interface and the electrical interface of the optical transceiver device face the inside of the single board of the service board, and are routed to the optical fiber connector through the optical fiber inside the single board. Specifically, this service board includes a single board and any one of the optical transceiver devices mentioned above. Refer to Figure 13 , for each optical transceiver device, the single board includes multiple optical fiber connectors and a first slot. The number of multiple optical fiber connectors is equal to the number of ports in one optical transceiver device. Each optical fiber connector is used to connect to an ODN, and different optical fiber connectors can be connected to different ODNs. The first slot is connected to multiple optical fiber connectors, and the first slot is also connected to the electrical signal processing part of the single board. Figure 13 Four optical transceiver devices are shown in

[0118] In the process of upstream communication, the multiple optical fiber connectors receive multiple first upstream optical signals from multiple ODNs, and input the multiple first upstream optical signals to the optical transceiver device through the first slot. The optical transceiver device converts the multiple first upstream optical signals into electrical signals and sends them to the electrical signal processing part of the single board for processing.

[0119] In the process of downstream communication, the optical transceiver device inputs multiple first downstream optical signals to the multiple optical fiber connectors through the first slot. The optical fiber connectors output multiple first downstream optical signals to multiple ODNs, and each first downstream optical signal is sent to one ODN.

[0120] In an alternative manner, in order to dynamically adjust whether the ODN shares the resources of an optical transceiver device, the service board further includes an optical switch, a second slot, and a backup optical transceiver device. Refer to Figure 14 . Two input ports of the optical switch are respectively connected to the second slot and the first slot, the output port is connected to the first optical fiber connector among a plurality of optical fiber connectors, and the backup optical transceiver device is plugged into the second slot. Assume that the first optical fiber connector is connected to the target ODN. When the target ODN does not independently use the resources of an optical transceiver device, during the upstream communication process, the first optical fiber connector inputs an upstream optical signal to the optical switch, and the optical switch inputs the upstream optical signal to the optical transceiver device through the first slot. The optical transceiver device converts the upstream optical signal into an electrical signal and sends it to the electrical signal processing part of the single board for processing. During the downstream communication process, the optical transceiver device inputs a downstream optical signal to the optical switch through the first slot, the optical switch inputs the downstream optical signal to the first optical fiber connector, and the first optical fiber connector sends the downstream optical signal to the target ODN.

[0121] When the target ODN independently uses the resources of the backup optical transceiver device, during the upstream communication process, the first optical fiber connector inputs an upstream optical signal to the optical switch, and the optical switch inputs the upstream optical signal to the backup optical transceiver device through the second slot. The backup optical transceiver device converts the upstream optical signal into an electrical signal and sends it to the electrical signal processing part of the single board for processing. During the downstream communication process, the backup optical transceiver device inputs a downstream optical signal to the optical switch through the second slot, the optical switch inputs the downstream optical signal to the first optical fiber connector, and the first optical fiber connector sends the downstream optical signal to the target ODN.

[0122] In this way, it is possible to dynamically adjust whether the target ODN shares the resources of the optical transceiver device with other ODNs.

[0123] In addition, in the case where the optical transceiver device includes two ports, the two ports are connected to the first ODN and the second ODN, and the Figure 14 scheme shown can be adopted, and both the first ODN and the second ODN can independently use the resources of an optical transceiver device or share the resources of an optical transceiver device.

[0124] In the embodiments of the present disclosure, another service board is further provided. The service board includes a single board and a plurality of optical transceiver devices. The single board includes a third slot and an optical fiber connector, and the third slot plugs in a plurality of optical transceiver devices. For example, 4 optical transceiver devices are plugged into the third slot, and each optical transceiver device includes two ports. Refer to Figure 15 .

[0125] In an embodiment of the present disclosure, a service board is further provided. The service board includes a single board and an optical transceiver device. The single board includes a fourth slot, and the optical transceiver device is plugged into the fourth slot. A plurality of ports of the optical transceiver device are connected to external optical fibers, and the external optical fibers are used to connect to an ODN.

[0126] In an embodiment of the present disclosure, a communication device is further provided. The communication device includes the service board described above.

[0127] In an embodiment of the present disclosure, a communication system is further provided. The communication system includes the communication device described above, a plurality of ODNs, and a plurality of ONUs, or the communication device described above, a plurality of ODNs, and a plurality of ONTs, or the communication device described above, a plurality of ODNs, a plurality of ONUs, and a plurality of ONTs.

[0128] In the present disclosure, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions. It should be understood that there is no logical or temporal dependency between "first" and "second", nor are the quantity and execution order limited. It should also be understood that although the following description uses terms such as "first" and "second" to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of various examples, the first optical signal can be referred to as the second optical signal, and similarly, the second optical signal can be referred to as the first optical signal. The first optical signal and the second optical signal can both be optical signals, and in some cases, they can be separate and different optical signals.

[0129] In the present disclosure, the meaning of the term "at least one" refers to one or more, and the meaning of the term "a plurality" refers to two or more.

[0130] The above description is only an exemplary embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. An optical transceiver device, characterized in that, It includes N ports, a receiving optical splitting component, and at least one first detector. The N ports are used to be connected to N optical distribution networks (ODNs) one by one. The at least one first detector is a single-wavelength detector, and N is greater than 1. The N ports are used to receive N first optical signals from the N ODNs and input the N first optical signals to the receiving optical splitting component. The N first optical signals come from different ODNs. The receiving optical splitting component is used to demultiplex each of the N first optical signals and output it to the first detector corresponding to the wavelength. The optical signals with the same wavelength in at least two first optical signals are sent to the same first detector. The at least one first detector is used to convert the received optical signal into an electrical signal.

2. The optical transceiver device according to claim 1, characterized in that The receiving optical splitting component includes N optical multiplexers / demultiplexers. Each optical multiplexer / demultiplexer is connected to one of the N ports and is also connected to the at least one first detector. Different optical multiplexers / demultiplexers are connected to different ports. The N ports are used to input the N first optical signals to the N optical multiplexers / demultiplexers. Each optical multiplexer / demultiplexer is used to receive one first optical signal, demultiplex the one first optical signal, and output it to the first detector corresponding to the wavelength.

3. The optical transceiver device according to claim 1 or 2, characterized in that, The optical transceiver device further includes at least one signal sending component. The signal sending component includes a light source and a modulation and optical splitting module. The wavelengths of the optical signals output by different signal sending components are different. The light source is connected to the modulation and optical splitting module, and the modulation and optical splitting module is connected to the receiving optical splitting component. The light source is used to output a second optical signal. The modulation and optical splitting module is used to receive the second optical signal, perform data modulation and optical splitting processing on the second optical signal to obtain N third optical signals, and output them to the receiving optical splitting component. The N third optical signals include at least one positive-phase signal and / or at least one anti-phase signal. The receiving optical splitting component is further used to multiplex the third optical signals from the at least one signal sending component to obtain N optical signals and output them to the N ports. The N ports are further used to output the N optical signals.

4. The optical transceiver device according to claim 3, wherein The modulation and optical splitting module includes a first modulator. The receiving optical splitting component includes a first optical multiplexer / demultiplexer and a second optical multiplexer / demultiplexer, and N is equal to 2. The first modulator is respectively connected to the first optical multiplexer / demultiplexer and the second optical multiplexer / demultiplexer. Among the two ports, one port is connected to the first optical multiplexer / demultiplexer, and the other port is connected to the second optical multiplexer / demultiplexer. The first modulator is used to receive the second optical signal, perform data modulation processing on the second optical signal to obtain two third optical signals, and output them to the first optical multiplexer / demultiplexer and the second optical multiplexer / demultiplexer respectively. The two third optical signals include a positive-phase signal and an anti-phase signal. The first optical multiplexer / demultiplexer is used to multiplex the third optical signals from the at least one signal sending component to obtain one optical signal and output it to the connected port. The second optical multiplexer / demultiplexer is used to multiplex the third optical signals from the at least one signal sending component to obtain one optical signal and output it to the connected port.

5. The optical transceiver device according to claim 4, characterized in that In the at least one signal transmitting component, the first signal transmitting component further includes a variable optical splitter, a second modulator, and a first optical switch; the variable optical splitter is located between the light source and the first modulator and the second modulator, and the first optical switch is located between the second optical combiner / splitter and the first modulator and the second modulator; When the N ODNs share modulation resources, the variable optical splitter inputs the second optical signal to the first modulator, and the first modulator performs data modulation processing on the second optical signal to obtain two beams of third optical signals, which are respectively output to the first optical combiner / splitter and the first optical switch; When the N ODNs do not share the modulation resources, the variable optical splitter divides the second optical signal into two beams of optical signals, which are respectively output to the first modulator and the second modulator. The first modulator performs data modulation processing on the received beam of optical signal to obtain a beam of third optical signal and outputs it to the first optical combiner / splitter, and the second modulator performs data modulation processing on the received beam of optical signal to obtain a beam of third optical signal and outputs it to the first optical switch; The first optical switch is configured to input the received third optical signal to the second optical combiner / splitter.

6. The optical transceiver device according to any one of claims 1 to 5, characterized in that, The optical transceiver device further includes a second detector corresponding to the first wavelength and a second optical switch. The first wavelength belongs to the wavelengths of the optical signals detected by the at least one first detector, and the receiving optical splitting component includes a first optical combiner / splitter and a second optical combiner / splitter; The first optical combiner / splitter is connected to the first detector corresponding to the first wavelength, and the second optical switch is located between the second optical combiner / splitter and the first detector corresponding to the first wavelength and the second detector; The first optical combiner / splitter is configured to input the optical signal of the first wavelength in the received first optical signal to the first detector corresponding to the first wavelength; The second optical combiner / splitter is configured to input the optical signal of the first wavelength in the received first optical signal to the second optical switch; The second optical switch is configured to input the received optical signal to the first detector corresponding to the first wavelength when the N ODNs share receiving resources; and input the received optical signal to the second detector corresponding to the first wavelength when the N ODNs do not share the receiving resources; The second detector is configured to convert the received optical signal into an electrical signal.

7. The optical transceiver device according to claim 2, characterized in that, The optical transceiver device further includes a light source, a third modulator, and a third optical switch. The light source is connected to the third modulator, the third modulator is connected to the third optical switch, and the third optical switch is respectively connected to the N optical combiner / splitters; The light source is configured to output a second optical signal; The third modulator is configured to receive the second optical signal, perform data modulation processing on the second optical signal to obtain a beam of in-phase signal or a beam of anti-phase signal, and output it to the third optical switch; The third optical switch is configured to output the received optical signal to the target optical multiplexer / demultiplexer according to the usage time period of the N ODNs. The target optical multiplexer / demultiplexer is the optical multiplexer / demultiplexer connected to the target port, and the target port is the port connected to the ODN that is currently in the usage time period; Each optical multiplexer / demultiplexer is further configured to input the received optical signal to the connected port; Each port is further configured to output the received optical signal.

8. The optical transceiver device according to claim 1, wherein The receiving optical splitting component includes a filtering mirror and M demultiplexing modules. The at least one first detector includes M first detectors. The N ports are located on the reflected input optical path of the filtering mirror. The M demultiplexing modules correspond to the M first detectors one by one; The M demultiplexing modules are arranged in sequence. The first demultiplexing module is located on the optical path between the filtering mirror and the first first detector. The i-th demultiplexing module is located on the optical path between the (i - 1)-th demultiplexing module and the i-th first detector; The filtering mirror is configured to receive the N first optical signals and reflect the N first optical signals to the first demultiplexing module; Each of the first to (M - 1)-th demultiplexing modules is configured to output the optical signals belonging to the corresponding first detector among the received N optical signals to the corresponding first detector, and output the other optical signals to the next demultiplexing module; The M-th demultiplexing module is configured to reflect and output the received N optical signals to the corresponding first detector.

9. The optical transceiver device according to claim 8, characterized in that Each demultiplexing module includes a demultiplexing mirror and a focusing lens; The M focusing lenses correspond to the M first detectors one by one. The M focusing lenses are located on the optical path between the M demultiplexing mirrors and the M first detectors; Each of the first to (M - 1)-th demultiplexing mirrors is configured to output the optical signals belonging to the corresponding first detector among the received N optical signals to the corresponding focusing lens, and output the other optical signals to the demultiplexing mirror of the next demultiplexing module; The demultiplexing mirror in the M-th demultiplexing module is configured to reflect and output the received N optical signals to the corresponding focusing lens; Each focusing lens is configured to focus the input N optical signals and output them to the corresponding first detector.

10. The optical transceiver device according to claim 8 or 9, characterized in that, The first demultiplexing module is configured to transmit and output the optical signals belonging to the corresponding first detector among the N first optical signals to the corresponding first detector, and reflect and output the other optical signals to the second demultiplexing module, or reflect and output the optical signals belonging to the corresponding first detector among the N first optical signals to the corresponding first detector, and transmit and output the other optical signals to the second demultiplexing module; Each of the second to (M - 1)-th demultiplexing modules is configured to reflect and output the optical signals belonging to the corresponding first detector among the received N optical signals to the corresponding first detector, and transmit and output the other optical signals to the next demultiplexing module.

11. The optical transceiver device according to any one of claims 8 to 10, characterized in that, The optical transceiver device further includes an optical providing component and a beam splitting mirror component. The N ports are also located on the transmitted output optical path of the filtering mirror; The optical providing component is configured to output multiple modulated optical signals; The beam splitter assembly is configured to combine the multiple modulated optical signals into a combined optical signal, divide the combined optical signal into N fourth optical signals according to power, and input the N fourth optical signals to the filter mirror; The filter mirror is further configured to transmit the N fourth optical signals to the N ports; The N ports are further configured to output the N fourth optical signals.

12. The optical transceiver device according to any one of claims 1 to 11, characterized in that, The N first optical signals include one or two optical signals of 50 Gigabit Passive Optical Network (50G PON), 10 Gigabit Passive Optical Network (XG PON), 10 Gigabit Symmetric Passive Optical Network (XGS PON), or Gigabit Passive Optical Network (GPON).

13. An optical transceiver device, characterized in that, It includes at least one signal transmitting component, a receiving beam splitting component, and N ports, where N is greater than 1. The signal transmitting component includes a light source and a modulation beam splitting module; The light source is connected to the modulation beam splitting module, the modulation beam splitting module is connected to the receiving beam splitting component, and the receiving beam splitting component is connected to each port; The light source is configured to output a second optical signal; The modulation beam splitting module is configured to receive the second optical signal, perform data modulation processing on the second optical signal to obtain N third optical signals, and input the N third optical signals to the receiving beam splitting component. The N third optical signals include at least one in-phase signal and / or at least one anti-phase signal; The receiving beam splitting component is configured to multiplex the third optical signals from the at least one signal transmitting component to obtain N optical signals and output them to the N ports; The N ports are configured to output the N optical signals.

14. An optical transceiver device, characterized in that, It includes a first multiplexer / demultiplexer, a second multiplexer / demultiplexer, a first port, a second port, at least one detector, and at least one first optical switch; The first multiplexer / demultiplexer is located between the first port and each detector, the second multiplexer / demultiplexer is located between the second port and each detector, and a first optical switch is provided between the second multiplexer / demultiplexer and each detector; When the optical fiber link between the first port and the transmitting end is not faulty, the first multiplexer / demultiplexer is configured to receive the first optical signal input from the first port, demultiplex the first optical signal, and output it to the detector corresponding to the wavelength; The second multiplexer / demultiplexer is configured to receive the first optical signal input from the second port, demultiplex the first optical signal, and output it to the first optical switch connected to the detector corresponding to the wavelength; The at least one first optical switch is configured to input the received optical signal to the connected detector when the optical fiber link between the first port and the transmitting end is faulty, and disconnect when the optical fiber link between the first port and the transmitting end is not faulty; The detector is configured to convert the received optical signal into an electrical signal.

15. The optical transceiver device according to claim 14, wherein The optical transceiver device further includes at least one signal transmitting component; the signal transmitting component includes a light source, a modulation beam splitting module, and a second optical switch. The modulation beam splitting module is connected to the first multiplexer / demultiplexer, and the second optical switch is located between the modulation beam splitting module and the second multiplexer / demultiplexer; the wavelengths of the optical signals output by different signal transmitting components are different; The light source is connected to the modulation and splitting module, the modulation and splitting module is respectively connected to the second optical switch and the first multiplexer / demultiplexer, and the second optical switch is connected to the second multiplexer / demultiplexer; The light source is configured to output a second optical signal; The modulation and splitting module is configured to receive the second optical signal, perform data modulation and splitting processing on the second optical signal to obtain two optical signals, and output them to the first multiplexer / demultiplexer and the second optical switch respectively, where the two optical signals include a positive-phase signal and a negative-phase signal; The first multiplexer / demultiplexer is further configured to multiplex the optical signals from the at least one signal transmitting component and output them to the first port; The first port is further configured to output the received optical signal; When a fiber optic link fails between the first port and the receiving end, the second optical switch inputs the received optical signal to the second multiplexer / demultiplexer. The second multiplexer / demultiplexer multiplexes the optical signals from the at least one signal transmitting component and outputs them to the second port, and the second port outputs the received optical signal. When the fiber optic link between the first port and the receiving end is not faulty, the second optical switch is disconnected.

16. The optical transceiver device according to claim 14 or 15, characterized in that When the optical transceiver device is applied to an optical network terminal, the first port and the second port are used to connect different optical distribution networks (ODNs); When the optical transceiver device is applied to an optical line terminal, the first port and the second port are used to connect the same ODN.

17. A service board, characterized in that, It includes a single board and the optical transceiver device according to any one of claims 1 to 12; The single board includes a plurality of fiber optic connectors and a first slot; the optical transceiver device is plugged into the first slot, the first slot is connected to the plurality of fiber optic connectors, and the fiber optic connectors are used to connect to an optical distribution network (ODN); The plurality of fiber optic connectors are configured to receive multiple upstream optical signals from multiple ODNs and input the multiple upstream optical signals to the optical transceiver device through the first slot; The optical transceiver device is configured to convert the multiple upstream optical signals into electrical signals; The optical transceiver device is further configured to input multiple downstream optical signals to the plurality of fiber optic connectors through the first slot; The plurality of fiber optic connectors are further configured to output the multiple downstream optical signals to the multiple ODNs.

18. The optical transceiver device according to claim 17, wherein The service board further includes an optical switch, a second slot, and a backup optical transceiver device; Two input ports of the optical switch are respectively connected to the first slot and the second slot, and the output port is connected to the first fiber optic connector among the plurality of fiber optic connectors; the backup optical transceiver device is plugged into the second slot; The first fiber optic connector is configured to input a received upstream optical signal to the optical switch; When the ODN connected to the first fiber optic connector shares resources with the ODNs connected to other fiber optic connectors, the optical switch inputs the upstream optical signal to the optical transceiver device through the first slot; When the ODN connected to the first optical fiber connector does not share resources with the ODNs connected to other optical fiber connectors, the optical switch inputs the beam of upstream optical signals to the backup optical transceiver device through the second slot, and the backup optical transceiver device converts the beam of upstream optical signals into electrical signals.

19. The optical transceiver device according to claim 17 or 18, characterized in that, When the ODN connected to the first optical fiber connector shares resources with the ODNs connected to other optical fiber connectors, the optical transceiver device inputs one of the multiple beams of downstream optical signals to the optical switch through the first slot; When the ODN connected to the first optical fiber connector does not share resources with the ODNs connected to other optical fiber connectors, the backup optical transceiver device inputs the beam of downstream optical signals to the optical switch through the second slot; The optical switch is further configured to input the beam of downstream optical signals to the first optical fiber connector.

20. A communication device, characterized in that, It includes a service board according to any one of claims 17 to 19.

21. A communication system, characterized in that, It includes the communication device according to claim 20, multiple optical distribution networks ODNs and multiple optical network units ONUs, or includes the communication device according to claim 20, multiple ODNs and multiple optical network terminals ONTs, or includes the communication device according to claim 20, multiple ODNs, multiple ONUs and multiple ONUs.

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