JP7438286B2 - Optical transceiver system - Google Patents

Description

TECHNICAL FIELD The present invention relates to an optical transmitting/receiving structure, and particularly to an optical transmitting/receiving system.

BACKGROUND ART Time synchronization is an essential technology in communication networks, and in addition to servers directly obtaining the world standard time using the Global Navigation Satellite System (GNSS), there is also a high-precision time protocol (Precision Time). It is possible to receive the time signal transmitted from the upstream equipment using the protocol (PTP).

Generally, most of the transmission and reception between facilities uses a variable optical path method, but this method has the problem that the length of the transmission and reception routes may differ, deteriorating the quality of time synchronization. may occur, thereby impacting network services.

SUMMARY OF THE INVENTION Technical Problem In view of this, the present invention provides an optical transmission/reception system that can be used to solve the technical problem that the quality of time synchronization deteriorates and affects network services. .

Technical Means for Solving the Problems The present invention provides an optical transmission and reception system, including a first optical transceiver, a first optical duplexer, a second optical transceiver and a second optical duplexer. A first optical duplexer is connected to a first optical transceiver. A second optical duplexer is connected to a second optical transceiver. A single optical transmission route exists between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer exchange signals via the single optical transmission route.

The present invention provides an optical transmission and reception system, including 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. A first optical duplexer is connected to an optical connector. A second optical duplexer is connected to a second optical transceiver. A single optical transmission route exists between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer exchange signals via the single optical transmission route.

Technical Effects Based on the above, the optical transmission and reception system provided by the embodiments of the present invention has at least the following features. (1) The optical duplexer used in the present invention is a passive optical element, does not require additional power supply, and does not affect the operation and maintenance method of the original network system. (2) It is possible to solve the problem of deterioration in the quality of time synchronization caused by variable optical paths having asymmetrical lengths. (3) Optical cables can be saved. (4) The optical transmission/reception system of the present invention can be used in a network system with a transmission speed of 100 Gbps or less and a transmission distance of 80 km or less.

FIG. 3 is a schematic diagram of variable optical path transmission according to an embodiment of the present invention. 2 is a schematic diagram of an optical transmitting and receiving system based on FIG. 1; FIG. 3 is a schematic diagram of an optical transceiver system with asymmetric transmission delay according to FIG. 2; FIG. 1 is a schematic diagram of an optical transceiver system based on an embodiment of the present invention. 5 is a schematic diagram of an optical transmission and reception system based on FIGS. 3 and 4. FIG. 6 is a schematic diagram of the optical transceiver system based on FIG. 5; FIG.

Embodiment Please refer to FIG. 1, which is a schematic diagram of variable optical path transmission according to an embodiment of the present invention. In FIG. 1, optical transceiver 110 may include a receive port 112 and a transmit port 114, where receive port 112 may receive signals from other equipment/devices via a corresponding receive route (e.g., optical fiber). Often, transmission port 114 may transmit signals to other equipment/devices via a transmission route (eg, another optical fiber).

Referring to FIG. 2, FIG. 2 is a schematic diagram of the optical transceiver system based on FIG. In FIG. 2, the optical transmission/reception system 20 includes signal processing devices 21 and 22, each including an optical transceiver 110, and one or more optical transceivers 110 and 110 between the signal processing device 21 and the signal processing device 22, respectively. A plurality of optical connectors 23 are connected, and the optical connector 23 includes a first port 231 and a second port 232.

In this embodiment, the transmission port 114 of the signal processing device 21 may transmit the signal L1 to the reception port 112 of the signal processing device 22 via the first port 231 of each optical connector 23 in turn. In this case, it is assumed that one optical transmission route (for example, one optical fiber) exists between the transmission port 114 of the signal processing device 21 and the reception port 112 of the signal processing device 22. Further, the transmission port 114 of the signal processing device 22 may transmit the signal L2 to the reception port 112 of the signal processing device 21 via the second port 232 of each optical connector 23 in turn. In this case, it is assumed that another optical transmission route (for example, another optical fiber) exists between the transmission port 114 of the signal processing device 22 and the reception port 112 of the signal processing device 21.

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

For example, under the premise that network nodes A and B have not previously reached time synchronization, a time data packet with embedded T1 is transmitted from node A's T1 time to node B. After transmission, Node B receives this packet at the authorized time T2. Thereafter, the time data packet with T3 embedded therein is retransmitted from node B to node A from time T3. After transmission, node A receives this packet at the authorized time T4. Node A then retransmits the time data packet with embedded T4 back to node B. Once the Node B collects the packets corresponding to T1, T2, T3 and T4, the correction time can be calculated using the formula "(T2-T1-T4+T3)/2".

However, in this formula, if the transmission delay occurring on the link route between nodes A and B is symmetric, the goals are the delay from node A to node B's link route and the link route from node B to node A. This means that it is necessary to equalize the delays for both. As can be seen from this, PTP can be affected by asymmetric link route delays.

In the structure of FIG. 2, the two optical transmission routes may choose different optical fibers taking into account network design or other considerations, and the two optical transmission routes have different lengths, thereby causing different Possible transmission delay/link route delay. In this case, good synchronization cannot be achieved between the signal processing devices 21 and 22 through the PTP mechanism.

Referring to FIG. 3, FIG. 3 is a schematic diagram of an optical transceiver system with asymmetric transmission delay based on FIG. In FIG. 3, if the transmission port 114 of the signal processing device 21 transmits the signal L1 (for example, a data packet embedded with one time used in the above-mentioned PTP mechanism) via the optical transmission route P1, the optical The transmission route P1 is a sub optical transmission route P11 between the transmission port 114 of the signal processing device 21 and the first port 231 of the optical connector 23, and the first port 231 of the optical connector 23 and the reception port 112 of the signal processing device 22. A sub-optical transmission route P12 is provided between the two. Assuming that the lengths of the sub-optical transmission routes P11 and P12 are y1 kilometers and z2 kilometers, respectively, the length of the optical transmission route P1 is, for example, y1+z2 kilometers.

Furthermore, if the transmission port 114 of the signal processing device 22 transmits the signal L2 (for example, a data packet embedded with another time used in the above-mentioned PTP mechanism) via the optical transmission route P2, the optical transmission The route P2 is a sub-optical transmission route P22 between the transmission port 114 of the signal processing device 22 and the second port 232 of the optical connector 23, and a sub-optical transmission route P22 between the second port 232 of the optical connector 23 and the reception port 112 of the signal processing device 21. A sub-optical transmission route P21 is provided between the two. Assuming that the lengths of the sub-optical transmission routes P21 and P22 are z1 kilometers and x1 kilometers, respectively, the length of the optical transmission route P2 is, for example, x1+z1 kilometers.

As can be seen from FIG. 3, there is a difference in route length of |xy| between the optical transmission routes P1 and P2. Typically, the delay per kilometer of standard optical fiber is about 5000 ns, and this route length difference can result in a time error of about 2500 ns per kilometer, thereby affecting the accuracy of the PTP mechanism. There is a possibility that

Furthermore, in the construction of actual optical fiber networks, optical fibers bundled in a ring (for example, one optical fiber surrounding an entire city) are generally arranged, and different wires of the same optical fiber are connected to different facilities/equipments in different areas. There are various possibilities for use/connection to equipment (eg each relay station and/or communication machine room). In these cases, the remaining small amount of wire between the reception port 212 of the signal processing device 21 and the second port 232 of the optical connector and between the transmission port 214 of the signal processing device 21 and the first port 231 of the optical connector is removed. In the case of only selecting and using wire segments, a situation is likely to occur in which wire segments of different lengths are selected as sub-optical transmission routes P11 and P21, which leads to the problem shown in FIG. 3.

In view of this, the present invention provides a technical solution to improve the quality of time synchronization by combining optical duplexers, and replaces the transmission of a variable optical transmission route pair between two devices with the transmission of a single optical transmission route pair. Convert to This can prevent the difference in route length of variable optical transmission routes from being too large and affecting the quality of time synchronization.

Please refer to FIG. 4, which is a schematic diagram of an optical transceiver system based on 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. A single optical transmission route 499 exists between the first optical duplexer D1 and the second optical duplexer D2, and the first optical duplexer D1 and the second optical duplexer transmit signals via the single optical transmission route 499. exchange.

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 D1 through a single optical transmission route. D2, 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 the 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 receives the first The optical signal S1 is transferred to the second port D12 of the first optical duplexer D1, and the second port D12 of the first optical duplexer D1 transfers the first optical signal S1 to the second optical duplexer via a single optical transmission route 499. Send to 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 route 499; transfers the second optical signal S2 to the third port D13 of the first optical duplexer D1, and the third port D13 of the first optical duplexer D1 transfers the second optical signal S2 to the first receiving port 412 of the first optical transceiver 410. Send to.

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 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 via the single optical transmission route 499, and the second port D22 of the second optical duplexer D2 is connected to the second port D12 of the first optical duplexer D1 via the single optical transmission route 499. For example, the first optical signal S1 and the second optical signal S2) are exchanged.

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 receives the second optical signal S2 from the second transmission port 424 of the second optical transceiver 420. The optical signal S2 is transferred to the second port D22 of the second optical duplexer D2, and the second port D22 of the second optical duplexer D2 transfers the second optical signal S2 to the first optical duplexer D1 through a single optical transmission route. (second port 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 a single optical transmission route, and the second port D22 of the second optical duplexer D2 receives The first optical signal S1 is transferred to the third port D23 of the second optical duplexer D2, and the third port D23 of the second optical duplexer D2 transfers the first optical signal S1 to the second receiving port 422 of the second optical transceiver 420. Send.

In one embodiment, the first optical duplexer D1 and the second optical duplexer D2 exchange PTP synchronization signals via a single optical transmission route 499. In one embodiment, the first optical signal S1 may be a PTP synchronization signal embedded in the time used when performing the PTP mechanism, and the second optical signal S2 may be a time-embedded PTP synchronization signal used when performing the PTP mechanism. The PTP synchronization signal may be a PTP synchronization signal that embeds another time used for, but is not limited to this.

In this case, optical transceivers 410 and 420 can exchange PTP synchronization signals via a single optical transmission route 499, thus creating the problem of asymmetric transmission delay/link route delay as shown in FIG. do not have. This can improve the synchronization characteristics of the PTP mechanism.

In the embodiment of the present invention, both the first optical duplexer D1 and the second optical duplexer D2 are passive devices. In other words, both the first optical duplexer D1 and the second optical duplexer D2 can be used without the need for power supply or plugging into an outlet, and can be used by being connected to an optical transceiver, an optical connector, an optical cable, or the like.

Referring to FIG. 5, FIG. 5 is a schematic diagram of an optical transmission/reception system based on FIGS. 3 and 4. In FIG. 5, the first optical transceiver 410 may be installed, for example, within the signal processing device 51, and the second optical transceiver 420 may be installed, for example, within the signal processing device 52. In this embodiment, the first optical transceiver 410 may be connected to the first optical duplexer D1 in the manner shown in FIG. 4, and the second optical transceiver 420 may be connected to the second optical duplexer D2 in the manner shown in FIG. may also be used, so details will not be described here.

In an embodiment of the present invention, the structure of FIG. 5 can be understood by applying the structure of FIG. 4 to the structure of FIG. 3. In FIG. 5, the optical transmission/reception system 50 may further include an optical connector 53 installed on a single optical transmission route P3, where the first optical duplexer D1 is connected to the second optical duplexer D2 via the optical connector 53. Connected. In one embodiment, the optical connector 53 may include a first port 531 and a second port 532, such that the second port D12 of the first optical duplexer D1 is connected to the second port D12 of the second optical duplexer D2 via the second port 532. It may be connected to port D22.

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

In one embodiment, the sub-optical transmission route P32 may be, for example, one wire of an optical cable 599, and this optical cable 599 includes, for example, several tens/hundred wires and extends in a circular manner to a specific area (for example, a certain area). It may be located in a city/region) and may be several kilometers long, but is not limited to this.

In FIG. 5, 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; The signal S1 is transferred to the second port D12 of the first optical duplexer D1, and the second port D12 of the first optical duplexer D1 transfers the first optical signal S1 to the second port of the optical connector 53 via the sub-optical transmission route P31. 532. After that, the second port 532 of the optical connector 53 transmits the first optical signal S1 to the second port D22 of the second optical duplexer D2 via the sub-optical transmission route P32, and the second port D22 of the second optical duplexer D2 The first optical signal S1 is transferred to the third port D23 of the second optical duplexer D2, and the third port D23 transmits the first optical signal S1 to the second receiving port 422 of the optical transceiver 420.

Further, 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 receives the second optical signal S2. is transferred to the second port D22 of the second optical duplexer D2, and the second port D22 of the second optical duplexer D2 transfers the second optical signal S2 to the second port 532 of the optical connector 53 via the sub-optical transmission route P32. Send. After that, the second port 532 of the optical connector 53 transmits the second optical signal S2 to the second port D12 of the first optical duplexer D1 via the sub-optical transmission route P31, and the second port D12 of the first optical duplexer D1 The second optical signal S2 is transferred to the third port D13 of the first optical duplexer D1, and the second optical signal S2 is transmitted by the third port D13 to the second receiving port 412 of the optical transceiver 410.

From the above, the first optical signal S1 and the second optical signal S2 (each, for example, a PTP synchronization signal) pass through the same optical transmission route P3, and therefore the first optical signal S1 and the second optical signal S2 are transmitted/ It can be seen that there is no transmission delay/link route delay caused by asymmetric routes in the receiving process. In this case, the signal processing devices 51 and 52 can mutually achieve good PTP synchronization based on the first optical signal S1 and the second optical signal S2.

Also, since the signal processing devices 51 and 52 are only connected to each other via one optical cable/wire, the number of optical cables used can be correspondingly reduced.

In these embodiments, the optical transceiver of the invention may comprise certain active modules/components, which convert the electrical signals of the corresponding signal processing device into optical signals (e.g. the first optical signal S1 and/or the second optical signal S2). ), whereby the optical signal obtained by the conversion enters the optical transmission route and is transmitted.

In these embodiments, the optical connector of the present invention may be equipped with specific passive modules/elements, and connect different optical transmission routes (e.g. sub-optical transmission routes P31, P32) to the same optical transmission route (e.g. optical transmission route P3). ) can be used to connect to

In these embodiments, the optical duplexer (e.g. optical duplexer D1) of the present invention may include certain passive modules/components used to guide the transmitted light in the opposite direction (e.g. the second optical signal S2). It is possible to spatially separate it from the forward transmission light (for example, the first optical signal S1), and to output the variable transmission light from different ports (for example, the second port D12 and the third port D13). Can be used.

In these embodiments, the optical duplexer of the present invention can be implemented with the optical duplexer described in Taiwan Patent Application No. M599511, but is not limited thereto.

Referring to FIG. 6, FIG. 6 is a schematic diagram of the optical transmission and reception system based on FIG. In FIG. 6, the optical transmission/reception 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. Optical connector 53 is connected to 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. A single optical transmission route P4 exists between the first optical duplexer D1 and the second optical duplexer D2, and the first optical duplexer D1 and the second optical duplexer D2 are connected via the single optical transmission route P4. Exchanging signals.

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

In one embodiment, the first optical transceiver 410 includes a first receive port 412 and a first transmit 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 includes a The second port 532 of the optical connector 53 is connected to the first transmit 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 may be connected via, for example, an optical transmission route P52, and the second port 532 of the optical connector 53 and the The transceiver 410 may be connected to the first transmission port 414 via, for example, an optical transmission route P51, where the optical transmission routes P51 and P52 may have, for example, equal route lengths.

In one embodiment, the optical connector 53 and the optical transceiver 410 may be connected via, for example, one optical cable, and the optical transmission routes P51 and P52 are formed by selecting, for example, wires with equal lengths from the optical cable. It can be realized with. In other words, the optical transmission routes P51 and P52 may have equal route lengths.

In one 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. A second port D12 of D1 is connected to a second optical duplexer D2.

In FIG. 6, it can be seen that the first port D11 of the first optical duplexer D1 is connected to the first transmission port 414 of the optical transceiver 410 via the second port 532 of the optical connector 53. It can also be understood that the third port D13 of the first optical duplexer D1 is connected to the first receiving port 412 of the optical transceiver 410 via 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 via the second port 532 of the optical connector 53; The first port D11 of the optical duplexer D1 transfers 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 transfers the first optical signal S1 to the second port D12 of the first optical duplexer D1 through a single optical transmission route P4. and transmits the first optical signal S1 to the second optical duplexer D2.

In one embodiment, the optical transmission route P4 may be, for example, one wire of one optical cable 699, and this optical cable 699 is formed of, for example, several tens/hundred wires arranged in a circular manner in a specific area (for example, each city/ It may be located in an administrative district) or may extend over several kilometers, 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 route P4, and the second port D12 of the first optical duplexer D1 transfers the second optical signal S2 to the third port D13 of the first optical duplexer D1, and the third port D13 of the first optical duplexer D1 transfers the second optical signal S2 through the first port 531 of the optical connector 53. to a first receive port 412 of a first 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 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 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 receives the second optical signal S2 from the second transmission port 424 of the second optical transceiver 420. The optical signal S2 is transferred to the second port D22 of the second optical duplexer D2, and the second port D22 of the second optical duplexer D2 transfers the second optical signal S2 to the first optical duplexer via a single optical transmission route P4. D1 (second port 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 a single optical transmission route P4, and the second port D22 of the second optical duplexer D2 transfers the first optical signal S1 to the third port D23 of the second optical duplexer D2, and the third port D23 of the second optical duplexer D2 transfers the first optical signal S1 to the second receiving port 422 of the second optical transceiver 420. Send to.

In one embodiment, the first optical duplexer D1 and the second optical duplexer D2 exchange PTP synchronization signals via a single optical transmission route P4. In one embodiment, the first optical signal S1 may be a PTP synchronization signal embedded in the time used when performing the PTP mechanism, and the second optical signal S2 may be a time-embedded PTP synchronization signal used when performing the PTP mechanism. The PTP synchronization signal may be a PTP synchronization signal that embeds another time used for, but is not limited to this.

In this case, the optical transceivers 410 and 420 can exchange PTP synchronization signals via a single optical transmission route P4, thus causing the problem of asymmetric transmission delay/link route delay as shown in FIG. do not have. This can improve the synchronization characteristics of the PTP mechanism.

In the embodiment of the present invention, both the first optical duplexer D1 and the second optical duplexer D2 are passive devices. In other words, both the first optical duplexer D1 and the second optical duplexer D2 can be used without the need for power supply or plugging in an outlet, and can be used by being connected to an optical transceiver, an optical connector, an optical cable, or the like.

In FIG. 6, it can be understood that the optical transceiver 410 transmits the first optical signal S1 to the optical transceiver 420 via the optical transmission routes P51 and P4, and the optical transceiver 420 sends the first optical signal S1 to the optical transceiver 420 via the optical transmission routes P4 and P52. It can be understood as transmitting optical signal S2 to optical transceiver 420. In one embodiment, when the optical transmission routes P51 and P52 have equal route lengths by selecting wires with equal lengths, the optical transmission routes through which the first optical signal S1 and the second optical signal S2 pass have equal lengths. will be prepared. In this case, the problem of asymmetric transmission delay/link route delay as shown in FIG. 3 also does not occur. This can improve the synchronization characteristics of the PTP mechanism.

As explained above, the optical transceiver system provided by the embodiments of the present invention has at least the following features: (1) The optical duplexer used in the present invention is a passive optical element and requires an additional power supply. without affecting the operation and maintenance method of the original network system. (2) It is possible to solve the problem of deterioration in the quality of time synchronization caused by a variable optical path having an asymmetric length. (3) Optical cables can be saved. (4) The optical transmission/reception system of the present invention can be used in a network system with a transmission speed of 100 Gbps or less and a transmission distance of 80 km or less.

Although the present invention has been clarified as described above through the examples, it is not intended to limit the present invention, and changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention will fall within the protection scope of the present invention. as defined in the claims.

Industrial Applicability The optical transceiver system of the present invention can be used in optical fiber networks and is used to improve the quality of time synchronization.

Explanation of symbols 110 Optical transceiver 112 Reception port 114 Transmission port 20, 30, 40, 50, 60 Optical transmission/reception system 21, 22, 51, 52 Signal processing device 23, 53 Optical connector 231, 531 First port 232, 532 Second Port 410 First optical transceiver 412 First receiving port 414 First transmitting port 420 Second optical transceiver 422 Second receiving port 424 Second transmitting port 599, 699 Optical cable D1 First optical duplexer D11, D21 First port D12, D22 Two ports D13, D23 Third port D2 Second optical duplexer S1 First optical signal S2 Second optical signal L1, L2 Signal P1, P2, 499, P3, P4, P51, P52 Optical transmission route P11, P12, P21, P22 , P31, P32 Sub optical transmission route

Claims (18)

Daiichi 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;
A single optical transmission route exists between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer transmit signals via the single optical transmission route. exchange ,
The first optical duplexer and the second optical duplexer exchange highly accurate time protocol synchronization signals through the single optical transmission route. the first optical transceiver includes a first receiving port and a first transmitting port; 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 port of the first optical transceiver via the single optical transmission route. The optical transceiver system of claim 1, connected to an optical duplexer, wherein the third port of the first optical duplexer is connected to the first receive port of the first optical transceiver. The first port of the first optical duplexer receives a first optical signal from the first transmit port of the first optical transceiver, and the first port of the first optical duplexer receives the first optical signal from the first transmit port of the first optical transceiver. and the second port of the first optical duplexer transmits the first optical signal to the second optical duplexer via the single optical transmission route. The optical transmission/reception system according to item 2. The second port of the first optical duplexer receives a second optical signal from the second optical duplexer from the single optical transmission route, and the second port of the first optical duplexer receives the second optical signal from the single optical transmission route. to the third port of the first optical duplexer, and the third port of the first optical duplexer transmits the second optical signal to the first receiving port of the first optical transceiver. 2. The optical transmission/reception system described in 2. the second optical transceiver includes a second receiving port and a second transmitting port; 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 port via the single optical transmission route. The optical transceiver system of claim 1, connected to an optical duplexer, wherein the third port of the second optical duplexer is connected to the second receive port of the second optical transceiver. The first port of the second optical duplexer receives a second optical signal from the second transmit port of the second optical transceiver, and the first port of the second optical duplexer receives the second optical signal from the second transmit port of the second optical transceiver. the second optical signal to the second port of the second optical duplexer, and the second port of the second optical duplexer transmits the second optical signal to the first optical duplexer via the single optical transmission route. The optical transmission/reception system according to item 5. The second port of the second optical duplexer receives the first optical signal from the first optical duplexer from the single optical transmission route, and the second port of the second optical duplexer receives the first optical signal from the single optical transmission route. to the third port of the second optical duplexer, and the third port of the second optical duplexer transmits the first optical signal to the second receiving port of the second optical transceiver. 5. The optical transmission/reception system according to 5. The optical transceiver system according to claim 1, further comprising an optical connector installed on the single optical transmission route, wherein the first optical duplexer is connected to the second optical duplexer via the optical connector. The optical transmission/reception system according to claim 1, wherein both the first optical duplexer and the second optical duplexer are passive elements. Daiichi 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;
A single optical transmission route exists between the first optical duplexer and the second optical duplexer, and the first optical duplexer and the second optical duplexer transmit signals via the single optical transmission route. exchange ,
The first optical duplexer and the second optical duplexer exchange highly accurate time protocol synchronization signals through the single optical transmission route. 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 first port of the optical connector is connected to the first port of the first optical transceiver. 11. The optical transceiver system of claim 10 , wherein the second port of the optical connector is connected to a receive port, and the second port of the optical connector is connected to the first transmit port of the first optical transceiver. 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 12. The optical transceiver system of claim 11 , wherein the second port of a duplexer is connected to the second optical duplexer. The first port of the first optical duplexer receives a first optical signal from the first transmission port of the first optical transceiver via the second port of the optical connector; one port transfers the first optical signal to the second port of the first optical duplexer, and the second port of the first optical duplexer transfers the first optical signal via the single optical transmission route. The optical transceiver system according to claim 12 , wherein the optical transceiver system transmits the signal to the second optical duplexer. The second port of the first optical duplexer receives a second optical signal from the second optical duplexer from the single optical transmission route, and the second port of the first optical duplexer receives the second optical signal from the single optical transmission route. to the third port of the first optical duplexer, and the third port of the first optical duplexer transfers the second optical signal to the first optical transceiver via the first port of the optical connector. The optical transceiver system according to claim 12 , transmitting to the first receiving port. the second optical transceiver includes a second receiving port and a second transmitting port; 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 port via the single optical transmission route. 11. The optical transceiver system of claim 10 , connected to an optical duplexer, wherein the third port of the second optical duplexer is connected to the second receive port of the second optical transceiver. The first port of the second optical duplexer receives a second optical signal from the second transmit port of the second optical transceiver, and the first port of the second optical duplexer receives the second optical signal from the second transmit port of the second optical transceiver. the second optical signal to the second port of the second optical duplexer, and the second port of the second optical duplexer transmits the second optical signal to the first optical duplexer via the single optical transmission route. 16. The optical transmission/reception system according to item 15 . The second port of the second optical duplexer receives the first optical signal from the first optical duplexer from the single optical transmission route, and the second port of the second optical duplexer receives the first optical signal from the single optical transmission route. to the third port of the second optical duplexer, and the third port of the second optical duplexer transmits the first optical signal to the second receiving port of the second optical transceiver. 16. The optical transmission/reception system according to 15 . The optical transmission/reception system according to claim 10 , wherein both the first optical duplexer and the second optical duplexer are passive elements.

Images