CN210835348U - Single-fiber bidirectional transmission optical module - Google Patents
Single-fiber bidirectional transmission optical module Download PDFInfo
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- CN210835348U CN210835348U CN201921371832.9U CN201921371832U CN210835348U CN 210835348 U CN210835348 U CN 210835348U CN 201921371832 U CN201921371832 U CN 201921371832U CN 210835348 U CN210835348 U CN 210835348U
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Abstract
The utility model relates to the technical field of optical modules, and provides a single-fiber bidirectional transmission optical module, which comprises a shell, a light emitting component, a light receiving component and an optical circulator, wherein the light emitting component, the light receiving component and the optical circulator are all arranged in the shell, and the optical circulator is provided with a first port, a second port and a third port; the first port is a common port shared by light emitted by the light emitting module and light entering the light receiving module, the second port and the third port are respectively assembled with the light emitting module and the light receiving module, and at least one of the assembly between the second port and the light emitting module and the assembly between the third port and the light receiving module is a passive assembly. The utility model relates to a single fiber bidirectional transmission optical module saves transmission fiber resources, can realize the same wavelength or the transmission back and forth of the light signal of small wavelength interval in a single mode fiber; the optical packaging of the optical module is divided into a plurality of units, and then all the units are in direct-insert passive assembly, so that the quality and cost control of the optical packaging are facilitated.
Description
Technical Field
The utility model relates to an optical module technical field specifically is a single fiber bidirectional transmission optical module.
Background
The single-fiber bidirectional BiDi (bidirectional) means that optical signals in two transmitting and receiving directions can be transmitted in one optical fiber at the same time, like lanes in the front and back directions separated by an isolation zone on a road, and vehicles on two sides run on the respective lanes without interference. Conventional optical fiber transmission is single-fiber and unidirectional, so that two optical fibers are required for bidirectional communication. Compared with the prior art, the single-fiber bidirectional technology only uses one optical fiber to complete the work which can be completed by two optical fibers, and the transmission quantity of the existing optical fiber is doubled, thereby greatly saving the optical fiber resource.
In a typical single-fiber bidirectional technology, a core part is an optical device for realizing single-fiber bidirectional. The focus of the optical device is a WDM light splitting sheet in the central part, the light splitting sheet is an optical component made of glass, the WDM light splitting sheet can reflect the optical signal with the specific optical wavelength emitted by the local end, and the optical signal with the specific optical wavelength transmitted to the local end by the opposite end is reflected to perform light splitting treatment. The LD module and the PD module are both aligned with the optical port by optical coupling.
In the current single-fiber bidirectional technology, to realize simultaneous transmission of optical signals in two transmitting and receiving directions, different optical wavelengths need to be used in the transmitting and receiving directions, and the wavelengths need to have a certain interval under normal conditions, which generally needs to be greater than 40 nm. For example, the local terminal transmits 1310nm optical signals, and can simultaneously receive 1550nm optical signals transmitted from the opposite terminal to the local terminal. If the local terminal transmits 1310nm optical signals, and the opposite terminal transmits 1330nm optical signals to the local terminal, the optical wavelength signals transmitted in two directions cannot be separated under the current technical scheme.
In optical transmission networks, there is a Dense Wavelength Division Multiplexing (DWDM) technique, and the channel spacing in the transmission system is as narrow as 0.8 nm. How can be in the system
The method realizes single-fiber bidirectional transmission with small wavelength intervals, saves optical fiber resources in channels, and is the key point to be considered in the current networking.
Optical devices used in small wavelength spaced optical modules for single fiber bi-directional transmission typically use optical integration schemes. In other words, each optical package element needs to be aligned precisely within a limited package size required by a protocol, and the process is complex, which presents a high challenge to the packaging technology.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a single fiber bidirectional transmission optical module adopts the optical circulator to realize optical signal round trip transmission in a single mode fiber, then the passive equipment of rethread is favorable to the quality of optical packaging and the control of cost.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: a single-fiber bidirectional transmission optical module comprises a shell, and further comprises a light emitting assembly, a light receiving assembly and an optical circulator which are all arranged in the shell, wherein the optical circulator is provided with a first port, a second port and a third port; the first port is a common port shared by light emitted by the light emitting module and light entering the light receiving module, the second port and the third port are respectively assembled with the light emitting module and the light receiving module, and at least one of the assembly between the second port and the light emitting module and the assembly between the third port and the light receiving module is a passive assembly.
Further, the assembly between the second port and the light emitting assembly and the assembly between the third port and the light receiving assembly are passive assemblies.
Further, the passive assembly is an in-line assembly.
Further, the connecting end of the light emitting module, the connecting end of the light receiving module, the second port and the third port are all provided with ceramic ferrules, the connecting end of the light emitting module and the second port are communicated through the ceramic ferrules, and the connecting end of the light receiving module and the third port are also communicated through the ceramic ferrules.
Further, the second port and the third port are both located on the same side of the optical circulator, and the second port and the third port are both located on an opposite side of the optical circulator from the first port.
Further, the light emitting component and the light receiving component are both positioned on the same side of the light circulator and are arranged side by side.
Further, still include first FPC board and second FPC board, first FPC board with the optical transmission subassembly electricity is connected, the second FPC board with the optical reception subassembly electricity is connected.
Further, the first FPC board is located on one side, away from the optical circulator, of the light emitting assembly, and the second FPC board is located on one side, away from the optical circulator, of the light receiving assembly.
Further, still include the PCBA board, first FPC board with the second FPC board all with the PCBA board electricity is connected.
Further, the PCBA board is located the first FPC board with the second FPC board is kept away from one side of optical circulator.
Compared with the prior art, the beneficial effects of the utility model are that: a single-fiber bidirectional transmission optical module saves transmission optical fiber resources and can realize the back-and-forth transmission of optical signals with the same wavelength or small wavelength interval in a single mode optical fiber; the optical packaging of the optical module is divided into a plurality of units, and then the units are passively assembled in a direct-insert mode, so that the quality and cost control of the optical packaging are facilitated, and further a single-fiber bidirectional transmission optical module packaging solution with the same wavelength or small wavelength interval is provided.
Drawings
Fig. 1 is a schematic diagram of a single-fiber bidirectional transmission optical module according to an embodiment of the present invention;
fig. 2 is an exploded view of a single-fiber bidirectional transmission optical module according to an embodiment of the present invention;
fig. 3 is a partial schematic view of a single-fiber bidirectional transmission optical module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of optical signal transmission of a single-fiber bidirectional transmission optical module according to an embodiment of the present invention;
in the reference symbols: 1-a shell; 2-an optical circulator; 3-a light emitting assembly; 4-a light receiving component; 5-a first FPC; 6-a second FPC; 7-PCBA; 9-ceramic ferrule.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-4, an embodiment of the present invention provides a single-fiber bidirectional transmission optical module, which includes a housing 1, and in addition, includes a light emitting module 3, a light receiving module 4 and an optical circulator 2 all disposed in the housing 1, where the optical circulator 2 has a first port, a second port and a third port; the first port is a common port shared by the light emitted by the light emitting element 3 and the light entering the light receiving element 4, the second port and the third port are respectively assembled with the light emitting element 3 and the light receiving element 4, and at least one of the assembly between the second port and the light emitting element 3 and the assembly between the third port and the light receiving element 4 is a passive assembly. In this embodiment, the light emitting module 3 and the light receiving module 4 are respectively communicated with the second port and the third port of the optical circulator 2, and then transmitted to the communication optical fiber from the first port of the optical circulator 2 to implement light signal emission and complete electro-optical conversion, so that transmission optical fiber resources can be saved, and the back-and-forth transmission of light signals at the same wavelength or at a small wavelength interval in a single mode optical fiber can be implemented; the method divides parts of the optical module into several units, and then adopts direct-insert passive assembly of each unit, thereby being beneficial to the quality and cost control of optical packaging and further providing a single-fiber bidirectional transmission optical module packaging solution with the same wavelength or small wavelength interval. As shown in fig. 4, the optical signal of λ is an optical signal emitted from the optical transmitter module 3, and the optical signal of λ + Δ λ is an optical signal incident on the optical receiver module 4, and both share the first port, thereby realizing single-fiber bidirectional transmission. For example, a 72-wave DWDM system with ITU Grid C wave band, channel spacing of 100GHZ and wavelength spacing of 0.8nm selects 1559.79nm channels, 1558.98nm channels and 2 optical fiber channels to carry out point-to-point transmission to form a 20G 40km transmission system, thereby realizing single-fiber bidirectional transmission. Meanwhile, any other channel optical module can also carry out point-to-point arbitrary networking.
The following are specific examples:
in order to optimize the above solution, please refer to fig. 1 to 3, the assembly between the second port and the light emitting module 3 and the assembly between the third port and the light receiving module 4 are passive assemblies. Preferably, the passive assembly is a direct-insert assembly, specifically, the connection end of the light emitting module 3, the connection end of the light receiving module 4, the second port and the third port all have a ferrule 9, the connection end of the light emitting module 3 and the second port are communicated through the ferrule 9, and the connection end of the light receiving module 4 and the third port are also communicated through the ferrule 9. In this embodiment, the ferrule 9 is used in the passive assembly of the optical circulator 2, the optical transmitter module 3 and the optical receiver module 4, so that the single-fiber bidirectional transmission optical module with the same wavelength or small wavelength interval can be easily implemented, and the fiber resources in the channel can be saved.
As an optimization scheme of the embodiment of the present invention, please refer to fig. 1-3, the second port and the third port are both located on the same side of the optical circulator 2, and the second port and the third port are both located on an opposite side of the optical circulator 2 from the first port. In the present embodiment, by arranging the optical circulator 2 into two ports and one port, the positions of the light emitting module 3 and the light receiving module 4 can be located, facilitating the layout of the devices in the housing 1.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1-3, the light emitting module 3 and the light receiving module 4 are both located at the same side of the light circulator 2 and are arranged side by side. In the present embodiment, the proper arrangement of the light emitting module 3 and the light receiving module 4 can ensure the proper layout of the light receiving module 4 and the light emitting module 3 in the housing 1.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1-3, the optical module further includes a first FPC5 board and a second FPC6 board, the first FPC5 board is electrically connected to the light emitting module 3, and the second FPC6 board is electrically connected to the light receiving module 4. In this embodiment, the FPC board is a flexible circuit board on which some necessary devices can be mounted and connected to their corresponding components. Preferably, the first FPC5 board is located on the side of the light emitting assembly 3 away from the light circulator 2, and the second FPC6 board is located on the side of the light receiving assembly 4 away from the light circulator 2, that is, two FPC boards are arranged according to the positions of the light emitting assembly 3 and the light receiving assembly 4, so as to save space in the housing 1.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1-3, the optical module further includes a PCBA7 board, and the first FPC5 board and the second FPC6 board are electrically connected to the PCBA7 board. In this embodiment, a PCBA7 board is further provided as a circuit board for electrically connecting the first FPC5 board and the second FPC6 board. Similarly, in the layout of the positions, the PCBA7 board is positioned on one side of the first FPC5 board and the second FPC6 board far away from the optical circulator 2. A straight layout of these devices within the housing 1 is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A single fiber bidirectional transmission optical module comprises a shell, and is characterized in that: the light source module comprises a shell, a light emitting component, a light receiving component and an optical circulator, wherein the shell is internally provided with a first port, a second port and a third port; the first port is a common port shared by light emitted by the light emitting module and light entering the light receiving module, the second port and the third port are respectively assembled with the light emitting module and the light receiving module, and at least one of the assembly between the second port and the light emitting module and the assembly between the third port and the light receiving module is a passive assembly.
2. The optical module for single-fiber bidirectional transmission according to claim 1, wherein: and the assembly between the second port and the light emitting assembly and the assembly between the third port and the light receiving assembly are passive assemblies.
3. The optical module for single fiber bidirectional transmission according to claim 2, wherein: the passive assembly is a direct insertion assembly.
4. A single fiber bi-directional transmission optical module as claimed in claim 3, wherein: the connecting end of the light emitting assembly, the connecting end of the light receiving assembly, the second port and the third port are all provided with ceramic ferrules, the connecting end of the light emitting assembly and the second port are communicated through the ceramic ferrules, and the connecting end of the light receiving assembly and the third port are also communicated through the ceramic ferrules.
5. The optical module for single-fiber bidirectional transmission according to claim 1, wherein: the second port and the third port are both located on the same side of the optical circulator, and the second port and the third port are both located on the opposite side of the optical circulator from the first port.
6. The optical module for single-fiber bidirectional transmission according to claim 1, wherein: the light emitting component and the light receiving component are both positioned on the same side of the light circulator and are arranged side by side.
7. The optical module for single-fiber bidirectional transmission according to claim 1, wherein: still include first FPC board and second FPC board, first FPC board with the optical transmission subassembly electricity is connected, the second FPC board with the optical reception subassembly electricity is connected.
8. The optical module for single fiber bidirectional transmission according to claim 7, wherein: the first FPC board is located on one side, away from the optical circulator, of the light emitting assembly, and the second FPC board is located on one side, away from the optical circulator, of the light receiving assembly.
9. The optical module for single fiber bidirectional transmission according to claim 7, wherein: still include the PCBA board, first FPC board with the second FPC board all with the PCBA board electricity is connected.
10. The optical module for single fiber bidirectional transmission according to claim 9, wherein: the PCBA board is located the first FPC board with one side that the second FPC board kept away from the optical circulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921371832.9U CN210835348U (en) | 2019-08-22 | 2019-08-22 | Single-fiber bidirectional transmission optical module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921371832.9U CN210835348U (en) | 2019-08-22 | 2019-08-22 | Single-fiber bidirectional transmission optical module |
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| Publication Number | Publication Date |
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| CN210835348U true CN210835348U (en) | 2020-06-23 |
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| CN201921371832.9U Active CN210835348U (en) | 2019-08-22 | 2019-08-22 | Single-fiber bidirectional transmission optical module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299900A (en) * | 2023-02-27 | 2023-06-23 | 希烽光电科技(南京)有限公司 | Single-fiber bidirectional optical module and optical fiber winding method |
-
2019
- 2019-08-22 CN CN201921371832.9U patent/CN210835348U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116299900A (en) * | 2023-02-27 | 2023-06-23 | 希烽光电科技(南京)有限公司 | Single-fiber bidirectional optical module and optical fiber winding method |
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Address after: 430000 building 12, Block E, 52 Liufang Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee after: Wuhan Liante Technology Co.,Ltd. Address before: 430000 building 12, Block E, 52 Liufang Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee before: Linktel Technologies Co.,Ltd. |