Dual-optical-port receiving and transmitting device

Abstract

The utility model discloses a dual-optical-port transceiver device, which comprises a laser TO-CAN, a detector TO-CAN, a metal shell, a combined mirror bracket, a filter and two paths of independent adapters. Compared with the prior art, the utility model has the positive effects that light is transmitted in two adapters of a device by using a filter reflection technology, so that modules can be connected in series, and data transmission between a BBU machine room and an RRU machine room is realized only through one long-distance transmission optical fiber. Existing terminal network equipment can be utilized in BBU and RRU machine rooms, maintenance interfaces and maintenance modes do not need to be changed, fault points are not increased, transmission bandwidth is not changed, fiber core cost is reduced, upgrading of a BBU centralized networking mode is achieved, and a very simple network is created.

Description

Technical Field

[0001] This utility model relates to a dual-port light receiving and transmitting device. Background Technology

[0002] Currently, wireless fronthaul has fully adopted a network construction model based on centralized BBU (CRAN). With the implementation of the "Simplified Network" initiative, BBU concentration will further increase, and the problem of high investment in access optical cables (base station access optical cables + access backbone optical cables) caused by BBU concentration will become more prominent. Multiple technical solutions coexist in the current wireless fronthaul network, leading to network complexity on the one hand, and each solution has certain problems on the other, failing to fundamentally solve the network requirements of wireless fronthaul.

[0003] Direct fiber optic connection offers the best operational experience, but the BiDi solution still consumes too many fiber cores, especially in the trunk, resulting in long network construction cycles, high difficulty, and high investment. Fronthaul wavelength division multiplexing involves climbing to high altitudes and makes it difficult to define maintenance interfaces, increasing equipment nodes, investment, and potential failure points. The reliability of RRU cascaded networks deteriorates, as upstream RRU failures can affect the normal operation of downstream RRUs, limiting the network's usability and future expansion. Utility Model Content

[0004] To overcome the above-mentioned shortcomings of the prior art, this utility model proposes a dual-port transceiver device, which aims to solve the transmission problem between the BBU and RRU rooms. This utility model uses two independent adapters to connect the optical modules together, and only one long-distance transmission optical fiber is needed to realize data transmission between the BBU and RRU rooms.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a dual-port light-receiving and receiving device, comprising a metal housing, an isolator base, a lens base, a 45° lens frame, a combined lens frame, a first metal adapter, and a second metal adapter. A 45° filter, a 13° filter, and a 32° total reflection filter are bonded to the combined lens frame. A 45° total reflection filter is bonded to the 45° lens frame. The combined lens frame and the 45° lens frame are pressed into the metal housing. An isolator and a third lens are bonded to the isolator base. The laser TO-CAN is coupled and welded to the isolator base. A first lens and a 0° filter are bonded to the lens base. The isolator base and the lens base are bonded to the metal housing. A second lens and a fourth lens are bonded to the first metal adapter and the second metal adapter, respectively. The first metal adapter and the second metal adapter are welded to the metal housing. The detector TO-CAN is coupled and solidified to the metal housing.

[0006] Compared with the prior art, the positive effects of this utility model are:

[0007] This invention utilizes filter reflection technology to transmit light through two adapters in the device, enabling modules to be connected in series and achieving data transmission between the BBU and RRU equipment rooms using only a single long-distance transmission optical fiber. This invention allows the use of existing terminal network equipment in the BBU and RRU equipment rooms without modifying the maintenance interface or methods, without adding fault points, maintaining the same transmission bandwidth, reducing fiber core costs, and upgrading the BBU centralized (CRAN) network deployment mode to create a minimalist network. Specific advantages are as follows:

[0008] 1. For example Figure 4 The existing technology shown consumes a lot of fiber core resources, especially the backbone optical cable fiber core consumption is very large. Direct fiber drive consumes 3 or 6 optical fibers per station, while this technology only consumes 1 optical fiber per station, saving 67% of the total fiber core in the network.

[0009] 2. Existing technology networks have long construction cycles, high difficulty, and high investment. Construction is relatively easy when there are fiber core resources, but difficult when there are no fiber core resources. This technology is always relatively easy to construct.

[0010] 3. Existing RRU cascaded networks have poor scalability and reduced total bandwidth; this technology has better network scalability and can theoretically be expanded indefinitely.

[0011] 4. Existing technologies require higher investment in optical fiber cables for fronthaul wavelength division multiplexing (WDM) network construction; this technology requires lower investment in optical fiber cables for network construction.

[0012] 5. Existing network security technologies have a large number of fault points in fronthaul wavelength division multiplexing and RRU cascading, and a single device failure can cause the entire station to fail; this technology has fewer fault points, and an upstream failure will not affect the normal operation of the downstream.

[0013] 6. Existing network maintenance technologies involve transmission professionals climbing to high places, making it difficult to define maintenance interfaces, resulting in poor maintainability and difficulty in locating faults in fronthaul wavelength division multiplexing and RRU cascading. This technology does not involve transmission professionals climbing to high places, does not change the maintenance interface, has better maintainability, and makes it easier to locate faults.

[0014] 7. This utility model combines the advantages of various solutions and is the optimal solution among all current solutions, reducing costs and increasing efficiency while greatly simplifying network complexity. Attached Figure Description

[0015] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram illustrating the working principle of this utility model;

[0018] Figure 3 This is a schematic diagram of the computer room connection of this utility model;

[0019] Figure 4 This is a schematic diagram of the existing data center connection scheme;

[0020] The reference numerals in the figure include: laser TO-CAN 1, first transition ring 2, isolator mount 3, lens mount 4, first lens 5, 1290nm pass-through-other-wavelengths-stop-0° filter 6, detector TO-CAN 7, metal housing 8, 45° lens frame 9, 45° total reflection filter 10, second lens 11, second transition ring 12, first metal adapter 13, third lens 14, isolator 15, combined lens frame 16, 1270nm pass-through-other-wavelengths-stop-45° filter 17, 1270nm and 1290nm pass-through-1310~1370nm-stop-13° filter 18, 32° total reflection filter 19, fourth lens 20, third transition ring 21, second metal adapter 22, first to fourth fiber optic ferrules 23-1 to 23-4, 1270nm pass-through-other-wavelengths-stop-0° filter 24, 1290nm pass-through-other-wavelengths-stop-45° filter 25. Detailed Implementation

[0021] A dual-port light-receiving and light-receiving device, such as Figure 1 As shown, it includes: a laser TO-CAN 1, a first transition ring 2, an isolator mount 3, a lens mount 4, a first lens 5, a 1290nm pass-through filter for other wavelengths but 0° stop 6, a detector TO-CAN 7, a metal housing 8, a 45° lens frame 9, a 45° total reflection filter 10, a second lens 11, a second transition ring 12, a first metal adapter 13, a third lens 14, an isolator 15, a combined lens frame 16, a 1270nm pass-through filter for other wavelengths but 45° stop 17, a 1270nm and 1290nm pass-through filter for 1310~1370nm but 13° stop 18, a 32° total reflection filter 19, a fourth lens 20, a third transition ring 21, and a second metal adapter 22.

[0022] The packaging process of the dual-port light-receiving device of this utility model includes the following steps:

[0023] Step 1: Adhere the 1270nm pass-through-other-wavelength-stop-45° filter 17, the 1270nm and 1290nm pass-through-1310~1370nm-stop-13° filter 18 and the 32° total reflection filter 19 to the combined lens frame 16 using a baking adhesive process.

[0024] Step 2: The 45° total reflection filter 10 is bonded to the 45° frame 9 using a baking adhesive process;

[0025] Step 3: Adhere isolator 15 and third lens 14 to isolator base 3 using a baking adhesive process;

[0026] Step 4: The first lens 5 and the 1290nm pass-through filter 6 are bonded to the lens mount 4 using a baking adhesive process;

[0027] Step 5: Adhere the second lens 11 and the fourth lens 20 to the first metal adapter 13 and the second metal adapter 22 respectively using a baking adhesive process;

[0028] Step 6: Press the combined frame 16 into the metal housing 8 using a tight-fitting pressing method;

[0029] Step 7: Press the 45° frame 9 into the metal housing 8 using a tight-fitting pressing method;

[0030] Step 8: Adhere the isolator seat 3 to the metal housing 8 using a baking adhesive process;

[0031] Step 9: Adhere the lens mount 4 to the metal housing 8 using a baking adhesive process;

[0032] Step 10: Couple the laser TO-CAN 1 to the isolator seat 3, and weld them together using laser welding process through the first transition ring 2 as the adjustment ring;

[0033] Step 11: Laser weld the second metal adapter 22 to the metal housing 8, and use the third transition ring 21 as an adjustment ring to weld them together as one piece using laser welding technology;

[0034] Step 12: Laser weld the first metal adapter 13 to the metal housing 8, and weld them together as one piece using the second transition ring 12 as an adjustment ring;

[0035] Step 13: Couple the detector TO-CAN 7 to the metal housing 8, pre-cure with UV glue, and then cure with epoxy resin at high temperature, controlling the temperature at 85℃±10℃ for 80~100 minutes.

[0036] Step 14: Cycle the assembled active optical device between -40℃ and 85℃. The constant temperature holding time at -40℃ and 85℃ shall be at least 30 minutes for one cycle, and each cycle shall be no less than 40 cycles.

[0037] The working principle of the dual-port light-receiving and light-emitting device of this utility model is as follows: Figure 2As shown, it includes: a 1290nm pass-through filter with a 0° stop angle to other wavelengths (6), a 45° total reflection filter (10), a 1270nm pass-through filter with a 45° stop angle to other wavelengths (17), a 1270nm and 1290nm pass-through filter with a 13° stop angle to 1310-1370nm (18), a 32° total reflection filter (19), first to fourth fiber ferrules (23-1 to 23-4), a 1270nm pass-through filter with a 0° stop angle to other wavelengths (24), and a 1290nm pass-through filter with a 45° stop angle to other wavelengths (25), etc., among which: 1270Tx1290Rx dual-port transceiver devices and 1310Tx1330Rx dual-port transceiver devices in the BBU equipment room and The 1350Tx1370Rx dual-port transceivers are installed in optical modules, which are connected in series via short optical fibers. Similarly, the 1290Tx1270Rx, 1330Tx1310Rx, and 1370Tx1350Rx dual-port transceivers in the RRU room are also connected in series via short optical fibers. The BBU room and the RRU room are connected by a long-distance transmission optical fiber. The wavelength of the dual-port transceivers can be expanded to include 1370Tx1390Rx, 1390Tx1410Rx, etc., theoretically allowing for unlimited expansion.

[0038] (I) The 1270Tx1290Rx dual-port optical transceiver transmits 1270nm light through a 1270nm pass-through-other-wavelength-stop-45° filter 17 to the first fiber ferrule 23-1, and then through a long-distance transmission fiber to the 1290Tx1270Rx dual-port optical transceiver transmits 1270nm light, which is then reflected by a 1290nm pass-through-other-wavelength-stop-45° filter 25 to the 1270nm receiver. Similarly, 1290nm light is also transmitted through a 1290nm pass-through-other-wavelength-stop-45° filter 25 to the third fiber ferrule 23-3, and then through a long-distance transmission fiber to the 1270Tx1290Rx dual-port optical transceiver transmits 1270nm light, which is then reflected by a 1270nm pass-through-other-wavelength-stop-45° filter 17 to the 1290nm receiver, thus enabling the transmission of 1270nm and 1290nm light between the BBU and RRU rooms.

[0039] (II) The 1310nm and 1350nm light is transmitted through the second fiber ferrule 23-2 to the 45° total reflection filter 10, and then completely reflected to the 32° total reflection filter 19. From the 32° total reflection filter 19, it is reflected to the 1270nm and 1290nm light (passing through 1310-1370nm, stopping at 13°) filter 18. Then, it is transmitted through the first fiber ferrule 23-1 and the long-distance transmission fiber to the third fiber ferrule 23-3, and from the third fiber ferrule 23-3 to the 1270nm and 1290nm light (passing through 1310-1370nm, stopping at 13°) filter 18. It is then reflected to the 32° total reflection filter 19, and from the 32° total reflection filter 19 to the 45° total reflection filter 10, finally exiting through the fourth fiber ferrule 23-4. Similarly, the 1330nm and 1370nm light also pass through the fourth fiber ferrule 23-4. The light from fiber ferrule 23-4 is transmitted to the 45° total reflection filter 10, then completely reflected to the 32° total reflection filter 19, and then reflected from the 32° total reflection filter 19 to the 1270nm and 1290nm pass-through 1310~1370nm stop-through 13° filter 18. Then it is transmitted through the third fiber ferrule 23-3 and the long-distance transmission fiber to the first fiber ferrule 23-1, and then from the first fiber ferrule 23-1 to the 1270nm and 1290nm pass-through 1310~1370nm stop-through 13° filter 18. Then it is reflected to the 32° total reflection filter 19, and then reflected from the 32° total reflection filter 19 to the 45° total reflection filter 10. Finally, it is transmitted out through the second fiber ferrule 23-2, realizing the transmission of 1310nm and 1350nm light and 1330nm and 1370nm light between the BBU and RRU rooms.

[0040] (III) Multiple dual-port transceiver devices are connected in the BBU and RRU rooms, which are connected by only one long-distance transmission fiber to achieve data transmission between the BBU and RRU rooms. Figure 3 The diagram shows the connection diagram for the computer room.

Claims

1. A dual-port light-receiving and light-receiving device, characterized in that: The system includes a metal housing, an isolator mount, a lens mount, a 45° lens frame, a combined lens frame, a first metal adapter, and a second metal adapter. A 45° filter, a 13° filter, and a 32° total reflection filter are bonded to the combined lens frame. A 45° total reflection filter is bonded to the 45° lens frame. The combined lens frame and the 45° lens frame are pressed into the metal housing. An isolator and a third lens are bonded to the isolator mount. The laser TO-CAN is coupled and welded to the isolator mount. A first lens and a 0° filter are bonded to the lens mount. The isolator mount and the lens mount are bonded to the metal housing. A second lens and a fourth lens are bonded to the first metal adapter and the second metal adapter, respectively. The first metal adapter and the second metal adapter are welded to the metal housing. The TO-CAN detector is coupled and solidified into a single unit with the metal housing.

2. The dual-port light-receiving and receiving device according to claim 1, characterized in that: Both the combined frame and the 45° frame are pressed into the metal housing using a tight-fitting press-fit method.

3. The dual-port light-receiving and receiving device according to claim 1, characterized in that: The 45° filter, 13° filter, and 32° total reflection filter, which allow the transmitted wavelength to pass through other wavelengths, are all bonded to the combined frame using a baking adhesive process.

4. The dual-port light-receiving and receiving device according to claim 1, characterized in that: The 45° total reflection filter is bonded to the 45° frame using a baking adhesive process.

5. A dual-port light-receiving and receiving device according to claim 1, characterized in that: Both the isolator mount and the lens mount are bonded to the metal housing using a baking adhesive process.

6. A dual-port light-receiving and receiving device according to claim 1, characterized in that: The TO-CAN laser is welded to the isolator base as a whole via a transition ring as an adjustment ring.

7. A dual-port light-receiving and receiving device according to claim 1, characterized in that: Both the first and second metal adapters are welded to the metal housing as a single unit via transition rings as adjustment rings.

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