Dual-optical-port receiving and transmitting device and use method thereof

Abstract

The invention discloses a dual-optical-port transceiver device and a use method thereof. The optical device 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 device has the positive effects that light is transmitted in two paths of adapters of the device by utilizing 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 the BBU and RRU machine rooms, a maintenance interface and a maintenance mode do not need to be changed, fault points are not increased, the transmission bandwidth is not changed, the fiber core cost is reduced, upgrading of a BBU centralized networking mode is achieved, and a very simple network is built.

Description

Technical Field

[0001] The invention relates to a dual-light-port light-receiving and light-emitting device and a use method thereof. Background Art

[0002] At present, wireless fronthaul has fully adopted the network construction mode based on BBU concentration (CRAN). With the launch of the special action of building a "simplified network", the BBU concentration will be further improved, and the problem of large investment in access optical cables (base station access optical cables + access trunk optical cables) caused by BBU concentration will become more prominent. There are multiple technical solutions for wireless fronthaul in the existing network, which makes the network complex on the one hand, and on the other hand, each solution has certain problems and fails to fundamentally solve the network needs of wireless fronthaul.

[0003] Fiber direct drive is the best way to provide operational experience, but the BiDi solution still occupies too many optical cable cores, especially the trunk optical cable core consumption is very large, the network construction period is long, the difficulty is high, and the investment is high; the use of fronthaul wavelength division multiplexing involves climbing and maintenance interfaces that are not suitable for division, which increases equipment nodes, increases investment, and relatively increases the number of failure points; the reliability of the RRU cascade network deteriorates, and the failure of the upstream RRU will affect the normal operation of the downstream RRU, limiting the scope of network use and future expansion. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present invention proposes a dual-port optical transmitting and receiving device and a method of using the same, aiming to solve the problem of transmission between the BBU room and the RRU room. The present invention connects the optical modules in series by two independent adapters and uses only one long-distance transmission optical fiber to realize data transmission between the BBU room and the RRU room.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a dual-light-port light-receiving and light-emitting device, comprising a metal shell, an isolator seat, a lens seat, a 45° mirror frame, a combined mirror frame, a first metal adapter and a second metal adapter, a 45° filter that passes the emission wavelength and stops other wavelengths, a 13° filter and a 32° total reflection filter are bonded to the combined mirror frame, a 45° total reflection filter is bonded to the 45° mirror frame, and the combined mirror frame and the 45° mirror frame are pressed into the metal shell; an isolator and a third lens are bonded to the isolator seat, a laser TO-CAN is coupled and welded to the isolator seat as a whole, a first lens and a 0° filter are bonded to the lens seat, and the isolator seat and the lens seat are bonded to the metal shell; a second lens and a fourth lens are bonded to the first metal adapter and the second metal adapter respectively, and the first metal adapter and the second metal adapter are respectively welded to the metal shell; a detector TO-CAN is coupled and solidified to the metal shell as a whole.

[0006] The present invention also provides a method for using a dual-light-port light-receiving and light-emitting device, comprising the following steps:

[0007] Step 1: In the BBU room, install the 1270Tx1290Rx dual-port light receiving and emitting device, the 1310Tx1330Rx dual-port light receiving and emitting device, and the 1350Tx1370Rx dual-port light receiving and emitting device in the optical module in sequence, and then connect the optical fiber ferrule of the first metal adapter of the 1270Tx1290Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1310Tx1330Rx dual-port light receiving and emitting device in series through short optical fibers, and connect the optical fiber ferrule of the first metal adapter of the 1310Tx1330Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1350Tx1370Rx dual-port light receiving and emitting device in series through short optical fibers;

[0008] Step 2: In the RRU room, install the 1290Tx1270Rx dual-port light receiving and emitting device, the 1330Tx1310Rx dual-port light receiving and emitting device, and the 1370Tx1350Rx dual-port light receiving and emitting device in the optical module in sequence, and then connect the optical fiber ferrule of the first metal adapter of the 1290Tx1270Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1330Tx1310Rx dual-port light receiving and emitting device in series through short optical fibers, and connect the optical fiber ferrule of the first metal adapter of the 1330Tx1310Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1370Tx1350Rx dual-port light receiving and emitting device in series through short optical fibers;

[0009] Step 3: Connect the optical fiber ferrule of the second metal adapter of the 1270Tx1290Rx dual-port light receiving and emitting device in the BBU room to the optical fiber ferrule of the second metal adapter of the 1290Tx1270Rx dual-port light receiving and emitting device in the RRU room through a long-distance transmission optical fiber.

[0010] Compared with the prior art, the present invention has the following positive effects:

[0011] The present invention uses filter reflection technology to transmit light in the two-way adapter of the device, so that the modules can be connected in series, and data transmission between the BBU room and the RRU room is realized through only one long-distance transmission optical fiber. The present invention can use existing terminal network equipment in the BBU and RRU rooms, without changing the maintenance interface and maintenance method, without adding failure points, the transmission bandwidth remains unchanged, and the fiber core cost is reduced, and the BBU centralized (CRAN) network construction mode upgrade is realized to create a minimalist network. The specific advantages are as follows:

[0012] 1. If Figure 4 The existing technology shown occupies more fiber core resources, especially the trunk optical cable fiber core consumption is very large, the fiber direct drive station consumes 3 or 6 optical fibers, while the present technology consumes only 1 optical fiber per station, and the total fiber core saving in the total network is 67%.

[0013] 2. The existing technology network construction period is long, difficult, and requires high investment. It is easier to build when there are fiber core resources, but difficult to build when there are no fiber core resources. This technology is always easier to build.

[0014] 3. The existing RRU cascade network has poor scalability and reduced total bandwidth; the network scalability of this technology is better and can be expanded infinitely in theory.

[0015] 4. The investment in optical cables for the construction of the existing fronthaul wavelength division multiplexing network is relatively high; the investment in optical cables for the construction of the network using this technology is relatively low.

[0016] 5. In the network security of the existing technology, there are many failure points in the fronthaul wavelength division multiplexing and RRU cascading, and there is a problem that a single device failure may cause a whole station failure. The number of failure points of this technology is small, and the upstream failure does not affect the normal operation of the downstream.

[0017] 6. The network maintenance of the prior art involves the need for transmission professionals to climb high in fronthaul wavelength division multiplexing and RRU cascading, the maintenance interface is not easy to divide, the maintainability is poor, and the fault location is difficult to determine; this technology does not involve the need for transmission professionals to climb high, does not change the maintenance interface, has better maintainability, and the fault location is easy to determine.

[0018] 7. The present invention combines the advantages of various solutions and is the best solution among all the current solutions. It reduces costs, increases benefits, and greatly simplifies network complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the working principle of the present invention;

[0022] Figure 3 It is a schematic diagram of the connection of the computer room of the present invention;

[0023] Figure 4 This is a schematic diagram of the computer room connection of the existing solution;

[0024] The reference numerals in the figure include: laser TO-CAN 1, first transition ring 2, isolator seat 3, lens seat 4, first lens 5, 0° filter 6 for passing other wavelengths at 1290nm, detector TO-CAN 7, metal shell 8, 45° mirror frame 9, 45° total reflection filter 10, second lens 11, second transition ring 12, first metal adapter 13, third lens 14, isolator 15, combined mirror frame 16, 45° filter 17 for passing other wavelengths at 1270nm, 13° filter 18 for passing 1310-1370nm at 1270nm and 1290nm, 32° total reflection filter 19, fourth lens 20, third transition ring 21, second metal adapter 22, first to fourth optical fiber ferrules 23-1 to 23-4, 0° filter 24 for passing other wavelengths at 1270nm, and 45° filter 25 for passing other wavelengths at 1290nm. DETAILED DESCRIPTION

[0025] A dual-port light receiving and emitting device, such as Figure 1 As shown, it includes: laser TO-CAN 1, a first transition ring 2, an isolator seat 3, a lens seat 4, a first lens 5, a 0° filter 6 that passes other wavelengths at 1290nm, a detector TO-CAN 7, a metal shell 8, a 45° mirror holder 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 mirror holder 16, a 45° filter 17 that passes other wavelengths at 1270nm, a 13° filter 18 that passes 1310-1370nm at 1270nm and 1290nm, a 32° total reflection filter 19, a fourth lens 20, a third transition ring 21, and a second metal adapter 22.

[0026] The packaging process of the dual-light-port light-receiving and light-emitting device of the present invention comprises the following steps:

[0027] Step 1: Glue the 45° filter 17 that passes other wavelengths at 1270nm, the 13° filter 18 that passes 1310-1370nm at 1270nm and 1290nm, and the 32° total reflection filter 19 to the combined mirror frame 16 by using a baking glue process;

[0028] Step 2: Adhere the 45° total reflection filter 10 to the 45° mirror frame 9 by using a baking glue process;

[0029] Step 3: Adhere the isolator 15 and the third lens 14 to the isolator seat 3 by using a baking glue process;

[0030] Step 4: Adhere the first lens 5 and the 1290nm pass and other wavelength stop 0° filter 6 to the lens holder 4 by using a baking glue process;

[0031] 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 by using a baking process;

[0032] Step 6: Press the combined lens frame 16 into the metal housing 8 by tight-fitting crimping;

[0033] Step 7: Press the 45° lens frame 9 into the metal housing 8 by tight-fitting crimping;

[0034] Step 8: Adhere the isolator seat 3 to the metal shell 8 by using a baking glue process;

[0035] Step nine, bonding the lens holder 4 to the metal housing 8 by using a baking glue process;

[0036] Step 10: Couple the laser TO-CAN 1 with the isolator seat 3, and weld them into one piece by using the laser welding process through the first transition ring 2 as an adjustment ring;

[0037] Step 11: Laser weld the second metal adapter 22 and the metal shell 8 together, and use the third transition ring 21 as an adjustment ring to weld them into one piece by laser welding;

[0038] Step 12: Laser weld the first metal adapter 13 and the metal shell 8 together, and use the second transition ring 12 as an adjustment ring to weld them into one body by laser welding;

[0039] Step 13: couple the detector TO-CAN 7 with the metal housing 8, pre-cure with UV glue, and use epoxy resin glue for high temperature curing, with the temperature controlled at 85°C ± 10°C for 80 to 100 minutes;

[0040] Step 14: subject the assembled active optical device to a temperature cycle between -40°C and 85°C, wherein the constant temperature of -40°C and 85°C is maintained for at least 30 minutes as one cycle, and each cycle is no less than 40 cycles.

[0041] The working principle of the dual-light-port light-receiving and light-emitting device of the present invention is as follows: Figure 2As shown, it includes: a 0° filter 6 for passing other wavelengths at 1290nm, a 45° fully reflective filter 10, a 45° filter 17 for passing other wavelengths at 1270nm, a 13° filter 18 for passing 1310-1370nm at 1270nm and 1290nm, a 32° fully reflective filter 19, the first to fourth optical fiber ferrules 23-1 to 23-4, a 0° filter 24 for passing other wavelengths at 1270nm, a 45° filter 25 for passing other wavelengths at 1290nm, etc., wherein: 1270Tx1290Rx dual-port light-receiving and light-emitting devices, 1310Tx1330Rx dual-port light-receiving and light-emitting devices and The 1350Tx1370Rx dual-port light-receiving and light-emitting devices are installed in optical modules respectively, and the modules are connected in series through short optical fibers. Similarly, the 1290Tx1270Rx dual-port light-receiving and light-emitting devices, 1330Tx1310Rx dual-port light-receiving and light-emitting devices and 1370Tx1350Rx dual-port light-receiving and light-emitting devices in the RRU room are also connected in series through short optical fibers. The BBU room and the RRU room are connected through a long-distance transmission optical fiber. The wavelength of the dual-port light-receiving and light-emitting devices can be extended to 1370Tx1390Rx dual-port light-receiving and light-emitting devices, 1390Tx1410Rx dual-port light-receiving and light-emitting devices, etc., and theoretically can be infinitely expanded.

[0042] (i) The 1270Tx1290Rx dual-port receiving and emitting device transmits 1270nm light to the first optical fiber ferrule 23-1 through the 1270nm other wavelengths stop filter 17 at 45°, and then transmits it to the 1290Tx1270Rx dual-port receiving and emitting device through the long-distance transmission optical fiber, and is reflected to the 1270nm receiver through the 1290nm other wavelengths stop filter 25; similarly, the 1290nm light is also transmitted to the third optical fiber ferrule 23-3 through the 1290nm other wavelengths stop filter 25, and then transmitted to the 1270Tx1290Rx dual-port receiving and emitting device through the long-distance transmission optical fiber, and is reflected to the 1290nm receiver through the 1270nm other wavelengths stop filter 17 at 45°, thereby realizing the transmission of 1270nm and 1290nm light between the BBU room and the RRU room;

[0043] (ii) The 1310nm and 1350nm lights are transmitted to the 45° total reflection filter 10 through the second optical fiber ferrule 23-2, and then all reflected to the 32° total reflection filter 19, and then reflected from the 32° total reflection filter 19 to the 13° filter 18 that stops at 1310-1370nm and 1270nm, and then transmitted to the third optical fiber ferrule 23-3 through the first optical fiber ferrule 23-1 and the long-distance transmission optical fiber, and then transmitted from the third optical fiber ferrule 23-3 to the 13° filter 18 that stops at 1310-1370nm and 1290nm, and then 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, and finally transmitted out through the fourth optical fiber ferrule 23-4; similarly, the 1330nm and 1370nm lights are also transmitted through the fourth optical fiber ferrule The optical fiber core 23-4 is transmitted to the 45° total reflection filter 10, and then all reflected to the 32° total reflection filter 19, and then reflected from the 32° total reflection filter 19 to the 13° filter 18 that stops 1270nm and 1290nm and passes 1310-1370nm, and then transmitted to the first optical fiber core 23-1 through the third optical fiber ferrule 23-3 and the long-distance transmission optical fiber, and then transmitted from the first optical fiber core 23-1 to the 13° filter 18 that stops 1270nm and 1290nm and passes 1310-1370nm, and then 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, and finally transmitted through the second optical fiber core 23-2, so as to realize the transmission of 1310nm and 1350nm light and 1330nm and 1370nm light between the BBU room and the RRU room.

[0044] (iii) Multiple dual-port optical receiving and transmitting devices are connected in the BBU room and the RRU room. The BBU room and the RRU room are connected by only one long-distance transmission optical fiber to realize data transmission between the BBU room and the RRU room, such as Figure 3 The computer room connection diagram is shown below.

Claims

1. A dual-port light receiving and emitting device, characterized in that: It comprises a metal shell, an isolator seat, a lens seat, a 45° mirror frame, a combined mirror 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 mirror frame, a 45° total reflection filter is bonded to the 45° mirror frame, and the combined mirror frame and the 45° mirror frame are pressed into the metal shell; an isolator and a third lens are bonded to the isolator seat, a laser TO-CAN is coupled and welded to the isolator seat as a whole, a first lens and a 0° filter are bonded to the lens seat, and the isolator seat and the lens seat are bonded to the metal shell; a second lens and a fourth lens are bonded to the first metal adapter and the second metal adapter respectively, and the first metal adapter and the second metal adapter are welded to the metal shell respectively; The detector TO-CAN is coupled and solidified with the metal shell as one.

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

3. A dual-port light-receiving and light-emitting device according to claim 1, characterized in that: The 45° filter, 13° filter and 32° total reflection filter that pass the transmitting wavelength and stop other wavelengths are all glued to the combined mirror frame using a baking glue process.

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

5. The dual-port light-receiving and light-emitting device according to claim 1, characterized in that: The isolator seat and the lens seat are both bonded to the metal shell by using a baking glue process.

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

7. The dual-port light-receiving and light-emitting device according to claim 1, characterized in that: The first metal adapter and the second metal adapter are both welded to the metal shell as a whole through a transition ring as an adjustment ring.

8. A method for using the dual-port light-receiving and light-emitting device according to claim 1, characterized in that: The steps include: Step 1: In the BBU room, install the 1270Tx1290Rx dual-port light receiving and emitting device, the 1310Tx1330Rx dual-port light receiving and emitting device, and the 1350Tx1370Rx dual-port light receiving and emitting device in the optical module in sequence, and then connect the optical fiber ferrule of the first metal adapter of the 1270Tx1290Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1310Tx1330Rx dual-port light receiving and emitting device in series through short optical fibers, and connect the optical fiber ferrule of the first metal adapter of the 1310Tx1330Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1350Tx1370Rx dual-port light receiving and emitting device in series through short optical fibers; Step 2: In the RRU room, install the 1290Tx1270Rx dual-port light receiving and emitting device, the 1330Tx1310Rx dual-port light receiving and emitting device, and the 1370Tx1350Rx dual-port light receiving and emitting device in the optical module in sequence, and then connect the optical fiber ferrule of the first metal adapter of the 1290Tx1270Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1330Tx1310Rx dual-port light receiving and emitting device in series through short optical fibers, and connect the optical fiber ferrule of the first metal adapter of the 1330Tx1310Rx dual-port light receiving and emitting device and the optical fiber ferrule of the second metal adapter of the 1370Tx1350Rx dual-port light receiving and emitting device in series through short optical fibers; Step 3: Connect the optical fiber ferrule of the second metal adapter of the 1270Tx1290Rx dual-port light receiving and emitting device in the BBU room to the optical fiber ferrule of the second metal adapter of the 1290Tx1270Rx dual-port light receiving and emitting device in the RRU room through a long-distance transmission optical fiber.

9. The method for using the dual-port light receiving and emitting device according to claim 8, characterized in that: (i) The 1270Tx1290Rx dual-port light receiving and emitting device transmits 1270nm light to the optical fiber ferrule of the second metal adapter through the 1270nm pass-through and 45° filter to stop other wavelengths, and then transmits it to the 1290Tx1270Rx dual-port light receiving and emitting device through the long-distance transmission optical fiber, and is reflected to the 1270nm receiver through the 1290nm pass-through and 45° filter; similarly, the 1290Tx1270Rx dual-port light receiving and emitting device transmits 1290nm light to the optical fiber ferrule of the second metal adapter through the 1290nm pass-through and 45° filter 25, and then transmits it to the 1270Tx1290Rx dual-port light receiving and emitting device through the long-distance transmission optical fiber, and is reflected to the 1290nm receiver through the 1270nm pass-through and 45° filter to stop other wavelengths, thereby realizing the transmission of 1270nm and 1290nm light between the BBU room and the RRU room; (ii) 1310nm and 1350nm light is transmitted to the 45° total reflection filter through the optical fiber ferrule of the first metal adapter of the 1270Tx1290Rx dual-port receiving and emitting device, and then completely reflected to the 32° total reflection filter, and then reflected from the 32° total reflection filter to the 13° filter that stops 1270nm and 1290nm from 1310 to 1370nm, and then transmitted to the 1290Tx1270Rx dual-port receiving and emitting device through the optical fiber ferrule of the second metal adapter and the long-distance transmission optical fiber. The light is then transmitted to the optical fiber ferrule of the second metal adapter, and then to the 1270nm and 1290nm pass 1310-1370nm 13° filter of the 1290Tx1270Rx dual-port light receiving and emitting device, and then reflected to the 32° total reflection filter, and then reflected from the 32° total reflection filter to the 45° total reflection filter, and finally transmitted through the optical fiber ferrule of the first metal adapter of the 1290Tx1270Rx dual-port light receiving and emitting device; similarly, the 1330nm and 1370nm lights are also transmitted through the 1290T The optical fiber ferrule of the first metal adapter of the x1270Rx dual-port receiving and emitting device is transmitted to the 45° total reflection filter, and then all reflected to the 32° total reflection filter, and then reflected from the 32° total reflection filter to the 13° filter that stops 1270nm and 1290nm and passes 1310-1370nm, and then transmitted to the second metal adapter of the 1290Tx1270Rx dual-port receiving and emitting device through the optical fiber ferrule and the long-distance transmission optical fiber to the second metal adapter of the 1270Tx1290Rx dual-port receiving and emitting device. The light is transmitted from the optical fiber ferrule of the metal adapter to the 13° filter that stops the 1310-1370nm transmission at 1270nm and 1290nm, and then reflected to the 32° total reflection filter, and then reflected from the 32° total reflection filter to the 45° total reflection filter, and finally transmitted through the optical fiber ferrule of the first metal adapter of the 1270Tx1290Rx dual-port receiving and emitting device, thereby realizing the transmission of 1310nm and 1350nm light as well as 1330nm and 1370nm light between the BBU room and the RRU room.

10. The method for using the dual-port light-receiving and light-emitting device according to claim 8, characterized in that: In the BBU room, the fiber optic ferrule of the first metal adapter of the last-stage 1350Tx1370Rx dual-port light receiving and emitting device is extended, and connected in series with the fiber optic ferrule of the second metal adapter of the 1390Tx1410Rx dual-port light receiving and emitting device through a short optical fiber; in the RRU room, the fiber optic ferrule of the first metal adapter of the last-stage 1370Tx1350Rx dual-port light receiving and emitting device is extended, and connected in series with the fiber optic ferrule of the second metal adapter of the 1410Tx1390Rx dual-port light receiving and emitting device through a short optical fiber.

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