TW202347978A - Optical transceiver system - Google Patents

Abstract

The disclosure provides an optical transceiver system, including a first optical transceiver, a first optical duplexer, a second optical transceiver and a second optical duplexer. The first optical duplexer is connected to the first optical transceiver. The second optical duplexer is connected to the second optical transceiver. A single optical transmission path exists between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer perform signal exchange through the single optical transmission path.

Description

Optical transceiver system

The present invention relates to an optical transceiver architecture, and in particular to an optical transceiver system.

Time synchronization is an indispensable technology in information and communication networks. In addition to directly obtaining the world standard time through the Global Navigation Satellite System (GNSS) receiver, it can also receive upstream signals through the Precision Time Protocol (PTP). The time signal transmitted by the device.

Generally speaking, most transmissions and receptions between devices adopt a dual-path method. However, this method may encounter different transmission and reception path lengths, resulting in time synchronization quality degradation and thus affecting network services.

In view of this, the present invention provides an optical transceiver system, which can be used to solve the above technical problems.

The invention provides an optical transceiver system, which includes a first optical transceiver, a first optical duplexer, a second optical transceiver and a second optical duplexer. The first optical duplexer is connected to the first optical transceiver. The second optical duplexer is connected to the second optical transceiver. There is a single optical transmission path between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer exchange signals through the single optical transmission path.

The invention provides an optical transceiver system, which includes a first optical transceiver, an optical connector, a first optical duplexer, a second optical transceiver and a second optical duplexer. The optical connector is connected to the first optical transceiver. The first optical duplexer is connected to the optical connector. The second optical duplexer is connected to the second optical transceiver. There is a single optical transmission path between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer exchange signals through the single optical transmission path.

Please refer to FIG. 1 , which is a schematic diagram of dual-path transmission according to an embodiment of the present invention. In FIG. 1 , the optical transceiver 110 may include a receiving port 112 and a transmitting port 114. The receiving port 112 may receive signals from other equipment/devices through a corresponding receiving path (such as an optical fiber), and the transmitting port 114 may receive signals through a transmitting path (such as an optical fiber). such as another optical fiber) to send signals to other equipment/devices.

Please refer to Figure 2, which is a schematic diagram of the optical transceiver system shown in Figure 1. In Figure 2, the optical transceiver system 20 includes signal processing devices 21 and 22, each of which includes an optical transceiver 110, and the optical transceiver 110 of the signal processing device 21 and the optical transceiver 110 of the signal processing device 22 are connected with one or A plurality of optical connectors 23, wherein the optical connectors 23 include a first port 231 and a second port 232.

In this embodiment, the transmitting port 114 of the signal processing device 21 can sequentially send the signal L1 to the receiving port 112 of the signal processing device 22 through the first port 231 of each optical connector 23 shown. In this case, there is an optical transmission path (such as an optical fiber) between the transmission port 114 of the visual signal processing device 21 and the receiving port 112 of the signal processing device 22 . In addition, the transmitting port 114 of the signal processing device 22 can sequentially send the signal L2 to the receiving port 112 of the signal processing device 21 through the second port 232 of each optical connector 23 shown. In this case, there is another optical transmission path (eg, another optical fiber) between the transmission port 114 of the visual signal processing device 22 and the receiving port 112 of the signal processing device 21 .

In one embodiment, the architecture of FIG. 2 can be used to transmit PTP synchronization signals between the signal processing devices 21 and 22 . Specifically, PTP can be used to distribute time signals and maintain time synchronization on different network nodes (such as signal processing devices 21 and 22). The goal of PTP is to calculate the minimum error in transmitting timestamps from one network node A to another node B to achieve time synchronization between the two nodes.

For example, on the premise that network nodes A and B have not previously reached time synchronization, a time data packet embedded in T1 is sent from node A's time T1 to node B. After transmission, Node B receives the packet at the time T2 it identifies. Then, the time data packet embedded in T3 is sent from node B to node A at time T3. After transmission, node A receives the packet at the time T4 it identifies. Afterwards, node A sends the time data packet embedded in T4 back to node B. After node B collects the packets corresponding to T1, T2, T3 and T4, it can use the formula of "(T2-T1-T4+T3)/2" to calculate the correction time.

However, this formula assumes that the transmission delay caused by the link routing between nodes A and B is symmetrical, that is, the target is that the link routing delay from node A to node B needs to be equal to the link routing delay from node B to node A. Routing delays are the same. It can be seen that PTP will be affected by link routing delay asymmetry.

In the architecture of Figure 2, since the two optical transmission paths shown may use different optical fibers due to network design or other considerations, the two optical transmission paths may have different lengths and thus may have different transmission delays/ Link routing delay. In this case, the signal processing devices 21 and 22 cannot achieve good synchronization through the PTP mechanism.

Please refer to FIG. 3 , which is a schematic diagram of an optical transceiver system with asymmetric propagation delay shown in FIG. 2 . In FIG. 3 , it is assumed that the transmission port 114 of the signal processing device 21 sends the signal L1 (for example, one of the time-embedded data packets used in the above-mentioned PTP mechanism) through the optical transmission path P1 , where the optical transmission path P1 includes between The sub-optical transmission path P11 between the transmission port 114 of the signal processing device 21 and the first port 231 of the optical connector 23, and between the first port 231 of the optical connector 23 and the receiving port 112 of the signal processing device 22 sub-optical transmission path P12. Assume that the lengths of the sub-optical transmission paths P11 and P12 are y1 kilometers and z2 kilometers respectively, then the length of the optical transmission path P1 is, for example, y1+z2 kilometers.

In addition, it is assumed that the transmission port 114 of the signal processing device 22 sends the signal L2 (for example, another time-embedded data packet used in the above-mentioned PTP mechanism) through the optical transmission path P2, where the optical transmission path P2 includes an interface between the signal processing device The sub-optical transmission path P22 between the transmission port 114 of the optical connector 23 and the second port 232 of the optical connector 23, and the sub-optical transmission path P22 between the second port 232 of the optical connector 23 and the receiving port 112 of the signal processing device 21 Transmission path P21. Assuming that the lengths of the sub-optical transmission paths P21 and P22 are z1 kilometers and x1 kilometers respectively, the length of the optical transmission path P2 is, for example, x1+z1 kilometers.

It can be seen from Figure 3 that there is a path length difference of | x–y | between the optical transmission paths P1 and P2. Generally speaking, the delay per kilometer of standard optical fiber is about 5000ns, and this path length difference can cause a time error of about 2500ns per kilometer, which may affect the accuracy of the PTP mechanism.

Furthermore, in the actual construction of optical fiber networks, the entire bundle of optical fibers is generally configured in a ring (such as a bundle of optical fibers surrounding the entire city), and different cores in the same bundle of optical fibers may be affected by different The application is connected to different equipment/devices located in different areas (such as various base stations and/or communication equipment rooms). In some cases, there are only a few core wires left between the receiving port 212 of the signal processing device 21 and the second port 232 of the optical connector, and between the transmitting port 214 of the signal processing device 21 and the first port 231 of the optical connector. When available for selection, it is easy to select core wire segments with different lengths as sub-optical transmission paths P11 and P21, which leads to the problem shown in Figure 3.

In view of this, the present invention provides a technical solution for improving time synchronization quality by combining an optical duplexer, which can convert dual optical transmission paths between two devices into a single optical transmission path. This can prevent the time synchronization quality from being affected by excessive differences in path lengths of the two optical transmission paths.

Please refer to FIG. 4 , which is a schematic diagram of an optical transceiver system according to an embodiment of the present invention. In FIG. 4 , the optical transceiver system 40 includes a first optical transceiver 410 , a first optical duplexer D1 , a second optical transceiver 420 and a second optical duplexer D2 . The first optical duplexer D1 is connected to the first optical transceiver 410 . The second optical duplexer D2 is connected to the second optical transceiver 420 . There is a single optical transmission path 499 between the first optical duplexer D1 and the second optical duplexer D2, and the first optical duplexer D1 and the second optical duplexer D2 exchange signals through the single optical transmission path 499.

In one embodiment, the first optical transceiver 410 includes a first receiving port 412 and a first transmitting port 414, and the first optical duplexer D1 includes a first port D11, a second port D12, and a third port D13. The first port D11 of the first optical duplexer D1 is connected to the first transmission port 414 of the first optical transceiver 410, and the second port D12 of the first optical duplexer D1 is connected to the second optical duplexer D2 through a single optical transmission path. , and the third port D13 of the first optical duplexer D1 is connected to the first receiving port 412 of the first optical transceiver 410 .

In one embodiment, the first port D11 of the first optical duplexer D1 receives a first optical signal S1 from the first transmission port 414 of the first optical transceiver 410, and the first port D11 of the first optical duplexer D1 transmits The first optical signal S1 is transmitted to the second port D12 of the first optical duplexer D1, and the second port D12 of the first optical duplexer D1 sends the first optical signal S1 to the second optical duplexer through the single optical transmission path 499. D2.

In one embodiment, the second port D12 of the first optical duplexer D1 receives the second optical signal S2 from the second optical duplexer D2 from the single optical transmission path 499, and the second port D12 of the first optical duplexer D1 transmits the second optical signal S2. The second optical signal S2 is transmitted to the third port D13 of the first optical duplexer D1, and the third port D13 of the first optical duplexer D1 sends the second optical signal S2 to the first receiving port of the first optical transceiver 410. 412.

In one embodiment, the second optical transceiver 420 includes a second receiving port 422 and a second transmitting port 424, and the second optical duplexer D2 includes a first port D21, a second port D22, and a third port D23. The first port D21 of the second optical duplexer D2 is connected to the second transmission port 424 of the second optical transceiver 420, and the second port D22 of the second optical duplexer D2 is connected to the first optical duplexer through a single optical transmission path 499. D1, the third port D23 of the second optical duplexer D2 is connected to the second receiving port 422 of the second optical transceiver 420.

In other words, the second port D22 of the second optical duplexer D2 is connected to the second port D12 of the first optical duplexer D1 through the single optical transmission path 499 to exchange signals (such as the first optical signal S1 through the single optical transmission path 499 and the second optical signal S2).

In one embodiment, the first port D21 of the second optical duplexer D2 receives the second optical signal S2 from the second transmission port 424 of the second optical transceiver 420, and the first port D21 of the second optical duplexer D2 forwards it. The second optical signal S2 is sent to the second port D22 of the second optical duplexer D2, and the second port D22 of the second optical duplexer D2 sends the second optical signal S2 to the first optical duplexer D1 through a single optical transmission path ( The second port D12).

In one embodiment, the second port D22 of the second optical duplexer D2 receives a first optical signal S1 from the first optical duplexer D1 from a single optical transmission path, and the second port D22 of the second optical duplexer D2 transmits The first optical signal S1 is transmitted to the third port D23 of the second optical duplexer D2, and the third port D23 of the second optical duplexer D2 sends the first optical signal S1 to the second receiving port of the second optical transceiver 420 422.

In one embodiment, the first optical duplexer D1 and the second optical duplexer D2 exchange PTP synchronization signals through a single optical transmission path 499. In one embodiment, the first optical signal S1 can be one of the time-embedded PTP synchronization signals used when implementing the PTP mechanism, and the second optical signal S2 can be another time-embedded time used when implementing the PTP mechanism. PTP synchronization signal, but may not be limited to this.

In this case, since the optical transceivers 410 and 420 can exchange PTP synchronization signals through a single optical transmission path 499, the problem of asymmetric transmission delay/link routing delay as shown in FIG. 3 will not occur. In this way, the synchronization performance of the PTP mechanism can be improved.

In the embodiment of the present invention, both the first optical duplexer D1 and the second optical duplexer D2 are passive components. In other words, the first optical duplexer D1 and the second optical duplexer D2 do not require power supply and are plug-and-play, so they can be connected and used with optical transceivers, optical connectors or optical cables.

Please refer to FIG. 5 , which is a schematic diagram of the optical transceiver system shown in FIGS. 3 and 4 . In FIG. 5 , the first optical transceiver 410 may be disposed in the signal processing device 51 , and the second optical transceiver 420 may be disposed in the signal processing device 52 , for example. In this embodiment, the first optical transceiver 410 can be connected to the first optical bidirectional device D1 in the manner shown in FIG. 4 , and the second optical transceiver 420 can be connected to the second optical bidirectional device D1 in the manner shown in FIG. 4 Device D2, so its details will not be described here.

In the embodiment of the present invention, the architecture of FIG. 5 can be understood as applying the architecture of FIG. 4 to the architecture of FIG. 3 . In FIG. 5 , the optical transceiver system 50 may further include an optical connector 53 disposed on a single optical transmission path P3, wherein the first optical duplexer D1 is connected to the second optical duplexer D2 through the optical connector 53 . In one embodiment, the optical connector 53 may include a first port 531 and a second port 532, and the second port D12 of the first optical duplexer D1 may be connected to the second port D2 of the second optical duplexer D2 through the second port 532. The second port is D22.

In an embodiment, the single optical transmission path P3 may include, for example, a sub-optical transmission path P31 between the second port D12 of the first optical duplexer D1 and the second port 532 of the optical connector 53, and between the optical The sub-optical transmission path P32 between the second port 532 of the connector 53 and the second port D22 of the second optical duplexer D2.

In one embodiment, the sub-optical transmission path P32 is, for example, one of the core wires in a bundle of optical cables 599, and the bundle of optical cables 599 may include, for example, tens/hundreds of core wires and may be arranged around a specific area (such as a certain city/administrative region). way, and can be several kilometers long, but is not limited to this.

In FIG. 5 , the first port D11 of the first optical duplexer D1 receives a first optical signal S1 from the first transmission port 414 of the first optical transceiver 410 , and the first port D11 of the first optical duplexer D1 forwards it. The first optical signal S1 is sent to the second port D12 of the first optical duplexer D1, and the second port D12 of the first optical duplexer D1 sends the first optical signal S1 to the second port of the optical connector 53 through the sub-optical transmission path P31. Erbu 532. After that, the second port 532 of the optical connector 53 sends the first optical signal S1 to the second port D22 of the second optical duplexer D2 through the sub-optical transmission path P32, and the second port D22 of the second optical duplexer D2 will The first optical signal S1 is forwarded to the third port D23 of the second optical duplexer D2, and the third port D23 sends the first optical signal S1 to the second receiving port 422 of the optical transceiver 420.

In addition, the first port D21 of the second optical duplexer D2 receives the second optical signal S2 from the second transmission port 424 of the second optical transceiver 420, and the first port D21 of the second optical duplexer D2 forwards the second optical signal. S2 to the second port D22 of the second optical duplexer D2, and the second port D22 of the second optical duplexer D2 sends the second optical signal S2 to the second port 532 of the optical connector 53 through the sub-optical transmission path P32. After that, the second port 532 of the optical connector 53 sends the second optical signal S2 to the second port D12 of the first optical duplexer D1 through the sub-optical transmission path P31, and the second port D12 of the first optical duplexer D1 will The second optical signal S2 is forwarded to the third port D13 of the first optical duplexer D1, and the third port D13 sends the second optical signal S2 to the second receiving port 412 of the optical transceiver 410.

It can be seen from the above that the first optical signal S1 and the second optical signal S2 (which are, for example, PTP synchronization signals respectively) pass through the same optical transmission path P3. Therefore, the transmission/reception of the first optical signal S1 and the second optical signal S2 There is no delivery delay/link routing delay due to asymmetric paths. In this case, the signal processing devices 51 and 52 can achieve good PTP synchronization with each other based on the first optical signal S1 and the second optical signal S2.

Moreover, since the signal processing devices 51 and 52 only need to be connected to each other through one optical cable/core wire, the number of optical cables used can be reduced accordingly.

In some embodiments, the optical transceiver of the present invention can have specific active modules/components, which can be used to convert the electrical signals of the corresponding signal processing devices into optical signals (such as the first optical signal S1 and/or the second optical signal S1 ). Optical signal S2), so that the converted optical signal enters the optical transmission path for transmission.

In some embodiments, the optical connector of the present invention can have specific passive modules/components, which can be used to connect different optical transmission paths (such as sub-optical transmission paths P31, P32) into the same optical transmission path (such as optical transmission paths). Path P3).

In some embodiments, the optical duplexer of the present invention (such as the optical duplexer D1) may include specific passive modules/components, which may be used to guide the reversely transmitted light (such as the second optical signal S2) to It is spatially separated from the forward transmission light (for example, the first optical signal S1), and the bidirectional transmission light is output from different ports (for example, the second port D12 and the third port D13).

In some embodiments, the optical duplexer of the present invention can be implemented as the optical duplexer recorded in Taiwan Patent Application No. M599511, but it is not limited thereto.

Please refer to FIG. 6 , which is a schematic diagram of the optical transceiver system shown in FIG. 5 . In FIG. 6 , the optical transceiver system 60 includes a first optical transceiver 410 , an optical connector 53 , a first optical duplexer D1 , a second optical transceiver 420 and a second optical duplexer D2 . The optical connector 53 is connected to the first optical transceiver 410 . The first optical duplexer D1 is connected to the optical connector 53 . The second optical duplexer D2 is connected to the second optical transceiver 420 . There is a single optical transmission path P4 between the first optical duplexer D1 and the second optical duplexer D2, and the first optical duplexer D1 and the second optical duplexer D2 exchange signals through the single optical transmission path P4.

In FIG. 6 , the first optical transceiver 410 may be disposed in the signal processing device 51 , and the second optical transceiver 420 may be disposed in the signal processing device 52 , for example.

In one embodiment, the first optical transceiver 410 includes a first receiving port 412 and a first transmitting port 414, the optical connector 53 includes a first port 531 and a second port 532, and the first port 531 of the optical connector 53 is connected to At the first receiving port 412 of the first optical transceiver 410 , the second port 532 of the optical connector 53 is connected to the first transmitting port 414 of the first optical transceiver 410 .

In FIG. 6 , the first port 531 of the optical connector 53 and the first receiving port 412 of the optical transceiver 410 can be connected, for example, through the optical transmission path P52 , and the second port 532 of the optical connector 53 is connected to the optical transceiver 410 . The first transmission ports 414 of 410 may be connected through an optical transmission path P51, for example, where the optical transmission paths P51 and P52 may have the same path length, for example.

In one embodiment, the optical connector 53 and the optical transceiver 410 may be connected through a bundle of optical cables, for example, and the optical transmission paths P51 and P52 may be implemented by using core wires of the same length in the bundle of optical cables. In other words, the optical transmission paths P51 and P52 may have the same path length.

In an embodiment, the first optical duplexer D1 includes a first port D11, a second port D12 and a third port D13. The third port D13 of the first optical duplexer D1 is connected to the first port D11 of the optical connector 53 , and the first port D11 of the first optical duplexer D1 is connected to the second port 532 of the optical connector 53 . The second port D12 of the device D1 is connected to the second optical duplexer D2.

In FIG. 6 , the first port D11 of the first optical duplexer D1 can be understood as being connected to the first transmission port 414 of the optical transceiver 410 through the second port 532 of the optical connector 53 . In addition, the third port D13 of the first optical duplexer D1 can be understood as being connected to the first receiving port 412 of the optical transceiver 410 through the first port 531 of the optical connector 53 .

In one embodiment, the first port D11 of the first optical duplexer D1 receives the first optical signal S1 from the first transmission port 414 of the first optical transceiver 410 through the second port 532 of the optical connector 53. The first port D11 of the duplexer D1 forwards the first optical signal S1 to the second port D12 of the first optical duplexer D1, and the second port D12 of the first optical duplexer D1 transmits the first optical signal S1 through the single optical transmission path P4. Signal S1 is sent to the second optical duplexer D2.

In one embodiment, the optical transmission path P4 is, for example, one of the core wires in a bundle of optical cables 699 , and the bundle of optical cables 699 may include, for example, tens/hundreds of core wires and may be arranged around a specific area (such as various cities/administrative regions). way, and can be several kilometers long, but is not limited to this.

In one embodiment, the second port D12 of the first optical duplexer D1 receives the second optical signal S2 from the second optical duplexer D2 from the single optical transmission path P4, and the second port D12 of the first optical duplexer D1 transmits The second optical signal S2 is transmitted to the third port D13 of the first optical duplexer D1, and the third port D13 of the first optical duplexer D1 sends the second optical signal S2 to the third port through the first port 531 of the optical connector 53. A first receiving port 412 of an optical transceiver 410.

In one embodiment, the second optical transceiver 420 includes a second receiving port 422 and a second transmitting port 424, and the second optical duplexer D2 includes a first port D21, a second port D22, and a third port D23. The first port D21 of the second optical duplexer D2 is connected to the second transmission port 424 of the second optical transceiver 420, and the second port D22 of the second optical duplexer D2 is connected to the first optical duplexer through a single optical transmission path P4. D1 (the second port D12 ), the third port D23 of the second optical duplexer D2 are connected to the second receiving port 422 of the second optical transceiver 420 .

In one embodiment, the first port D21 of the second optical duplexer D2 receives the second optical signal S2 from the second transmission port 424 of the second optical transceiver 420, and the first port D21 of the second optical duplexer D2 forwards it. The second optical signal S2 is sent to the second port D22 of the second optical duplexer D2, and the second port D22 of the second optical duplexer D2 sends the second optical signal S2 to the first optical duplexer D1 through the single optical transmission path P4. (The second port is D12).

In one embodiment, the second port D22 of the second optical duplexer D2 receives the first optical signal S1 from the first optical duplexer D1 from the single optical transmission path P4, and the second port D22 of the second optical duplexer D2 transmits The first optical signal S1 is transmitted to the third port D23 of the second optical duplexer D2, and the third port D23 of the second optical duplexer D2 sends the first optical signal S1 to the second receiving port of the second optical transceiver 420 422.

In one embodiment, the first optical duplexer D1 and the second optical duplexer D2 exchange PTP synchronization signals through a single optical transmission path P4. In one embodiment, the first optical signal S1 can be one of the time-embedded PTP synchronization signals used when implementing the PTP mechanism, and the second optical signal S2 can be another time-embedded time used when implementing the PTP mechanism. PTP synchronization signal, but may not be limited to this.

In this case, since the optical transceivers 410 and 420 can exchange PTP synchronization signals through a single optical transmission path P4, the problem of asymmetric transmission delay/link routing delay as shown in FIG. 3 will not occur. In this way, the synchronization performance of the PTP mechanism can be improved.

In the embodiment of the present invention, both the first optical duplexer D1 and the second optical duplexer D2 are passive components. In other words, the first optical duplexer D1 and the second optical duplexer D2 do not require power supply and are plug-and-play, so they can be connected and used with optical transceivers, optical connectors or optical cables.

In FIG. 6 , the optical transceiver 410 can be understood as sending the first optical signal S1 to the optical transceiver 420 through the optical transmission paths P51 and P4, and the optical transceiver 420 can be understood as transmitting the second optical signal S1 through the optical transmission paths P4 and P52. The optical signal S2 is sent to the optical transceiver 420. In an embodiment, if the optical transmission paths P51 and P52 are selected to have the same path length by using core wires of the same length, then the optical transmission paths passed by the first optical signal S1 and the second optical signal S2 will have the same length. . In this case, the problem of asymmetric delivery delay/link routing delay as shown in Figure 3 will not occur. In this way, the synchronization performance of the PTP mechanism can be improved.

To sum up, the optical transceiver system proposed in the embodiment of the present invention has at least the following characteristics: (1) The optical bidirectional device used in the present invention is a passive optical element, which requires no additional power supply and does not affect the operation and maintenance of the original network system; (2) It can solve the problem of time synchronization quality degradation caused by asymmetric length dual paths; (3) It can save optical cables; (4) The optical transceiver system of the present invention can be applied to networks with a transmission rate of less than 100Gbps and a transmission distance of less than 80km. system.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the appended patent application scope.

110: Optical transceiver 112:Receive port 114:Transport port 20,30,40,50,60: Optical transceiver system 21,22,51,52:Signal processing device 23,53: Optical connector 231,531: first port 232,532: Second port 410:The first optical transceiver 412: First receiving port 414: First transmission port 420: Second optical transceiver 422: Second receiving port 424: Second transmission port 599,699: Optical cable D1: The first optical duplexer D11,D21: first port D12,D22: Second port D13,D23: The third port D2: Second optical duplexer S1: first light signal S2: Second light signal L1, L2: signal P1, P2, 499, P3, P4, P51, P52: Optical transmission path P11, P12, P21, P22, P31, P32: Sub-optical transmission path

FIG. 1 is a schematic diagram of dual-path transmission according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the optical transceiver system shown in FIG. 1 . FIG. 3 is a schematic diagram of an optical transceiver system with asymmetric propagation delay shown in FIG. 2 . FIG. 4 is a schematic diagram of an optical transceiver system according to an embodiment of the present invention. FIG. 5 is a schematic diagram of the optical transceiver system shown in FIGS. 3 and 4 . FIG. 6 is a schematic diagram of the optical transceiver system shown in FIG. 5 .

40: Optical transceiver system

410:The first optical transceiver

412: First receiving port

414: First transmission port

420: Second optical transceiver

422: Second receiving port

424: Second transmission port

D1: The first optical duplexer

D11,D21: first port

D12,D22: Second port

D13,D23: The third port

D2: Second optical duplexer

S1: first light signal

S2: Second light signal

499:Light transmission path

Claims (20)

An optical transceiver system, including: a first optical transceiver; a first optical duplexer connected to the first optical transceiver; a second optical transceiver; a second optical duplexer connected to the second optical transceiver; There is a single optical transmission path between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer exchange signals through the single optical transmission path. The optical transceiver system of claim 1, wherein the first optical transceiver includes a first receiving port and a first transmitting port, and the first optical duplexer includes a first port, a second port and a third port; The first port of the first optical duplexer is connected to the first transmission port of the first optical transceiver, and the second port of the first optical duplexer is connected to the second optical duplexer through the single optical transmission path. The third port of the first optical duplexer is connected to the first receiving port of the first optical transceiver. The optical transceiver system of claim 2, wherein the first port of the first optical duplexer receives a first optical signal from the first transmission port of the first optical transceiver, and the first optical duplexer The first port forwards the first optical signal to the second port of the first optical duplexer, and the second port of the first optical duplexer sends the first optical signal to the second optical duplexer. The optical transceiver system of claim 2, wherein the second port of the first optical duplexer receives a second optical signal from the second optical duplexer from the single optical transmission path, and the first optical duplexer The second port forwards the second optical signal to the third port of the first optical duplexer, and the third port of the first optical duplexer sends the second optical signal to the first optical transceiver The first receiving port of the device. The optical transceiver system of claim 1, wherein the second optical transceiver includes a second receiving port and a second transmitting port, and the second optical duplexer includes a first port, a second port and a third port; The first port of the second optical duplexer is connected to the second transmission port of the second optical transceiver, and the second port of the second optical duplexer is connected to the first optical duplexer through the single optical transmission path. The third port of the second optical duplexer is connected to the second receiving port of the second optical transceiver. The optical transceiver system of claim 5, wherein the first port of the second optical duplexer receives a second optical signal from the second transmission port of the second optical transceiver, and the second optical duplexer The first port forwards the second optical signal to the second port of the second optical duplexer, and the second port of the second optical duplexer sends the second optical signal to The first optical duplexer. The optical transceiver system of claim 5, wherein the second port of the second optical duplexer receives a first optical signal from the first optical duplexer from the single optical transmission path, and the second optical duplexer The second port forwards the first optical signal to the third port of the second optical duplexer, and the third port of the second optical duplexer sends the first optical signal to the second optical transceiver The second receiving port of the device. The optical transceiver system of claim 1 further includes an optical connector disposed on the single optical transmission path, wherein the first optical duplexer is connected to the second optical duplexer through the optical connector. The optical transceiver system of claim 1, wherein the first optical duplexer and the second optical duplexer exchange a high-precision time agreement synchronization signal through the single optical transmission path. The optical transceiver system as claimed in claim 1, wherein both the first optical duplexer and the second optical duplexer are passive components. An optical transceiver system, including: a first optical transceiver; An optical connector connected to the first optical transceiver; a first optical duplexer connected to the optical connector; a second optical transceiver; a second optical duplexer connected to the second optical transceiver; There is a single optical transmission path between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer exchange signals through the single optical transmission path. The optical transceiver system of claim 11, wherein the first optical transceiver includes a first receiving port and a first transmitting port, the optical connector includes a first port and a second port, and the optical connector The first port is connected to the first receiving port of the first optical transceiver, and the second port of the optical connector is connected to the first transmitting port of the first optical transceiver. The optical transceiver system of claim 12, wherein the first optical duplexer includes a first port, a second port and a third port; The third port of the first optical duplexer is connected to the first port of the optical connector, the first port of the first optical duplexer is connected to the second port of the optical connector, and the first optical duplexer is connected to the second port of the optical connector. The second port of the duplexer is connected to the second optical duplexer. The optical transceiver system of claim 13, wherein the first port of the first optical duplexer receives a first signal from the first transmission port of the first optical transceiver through the second port of the optical connector. Optical signal, the first port of the first optical duplexer forwards the first optical signal to the second port of the first optical duplexer, and the second port of the first optical duplexer transmits the single optical signal The transmission path sends the first optical signal to the second optical duplexer. The optical transceiver system of claim 13, wherein the second port of the first optical duplexer receives a second optical signal from the second optical duplexer from the single optical transmission path, and the first optical duplexer The second port forwards the second optical signal to the third port of the first optical duplexer, and the third port of the first optical duplexer transmits the third port through the first port of the optical connector. The two optical signals are sent to the first receiving port of the first optical transceiver. The optical transceiver system of claim 11, wherein the second optical transceiver includes a second receiving port and a second transmitting port, and the second optical duplexer includes a first port, a second port and a third port; The first port of the second optical duplexer is connected to the second transmission port of the second optical transceiver, and the second port of the second optical duplexer is connected to the first optical duplexer through the single optical transmission path. The third port of the second optical duplexer is connected to the second receiving port of the second optical transceiver. The optical transceiver system of claim 16, wherein the first port of the second optical duplexer receives a second optical signal from the second transmission port of the second optical transceiver, and the second optical duplexer The first port forwards the second optical signal to the second port of the second optical duplexer, and the second port of the second optical duplexer sends the second optical signal to The first optical duplexer. The optical transceiver system of claim 16, wherein the second port of the second optical duplexer receives a first optical signal from the first optical duplexer from the single optical transmission path, and the second optical duplexer The second port forwards the first optical signal to the third port of the second optical duplexer, and the third port of the second optical duplexer sends the first optical signal to the second optical transceiver The second receiving port of the device. The optical transceiver system of claim 11, wherein the first optical duplexer and the second optical duplexer exchange a high-precision time agreement synchronization signal through the single optical transmission path. The optical transceiver system as claimed in claim 11, wherein both the first optical duplexer and the second optical duplexer are passive components.

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