CN116131954B - Optical module, optical communication device, and optical communication network - Google Patents
Optical module, optical communication device, and optical communication network Download PDFInfo
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- CN116131954B CN116131954B CN202310052689.1A CN202310052689A CN116131954B CN 116131954 B CN116131954 B CN 116131954B CN 202310052689 A CN202310052689 A CN 202310052689A CN 116131954 B CN116131954 B CN 116131954B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
- G02B6/4208—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The application relates to the field of optical communication, and aims to solve the problem that the communication safety and stability of a known double-fiber module are low, and provides an optical module, optical communication equipment and an optical communication network. The optical module comprises an optical emitting element, an optical receiving element, a main adapter, a secondary adapter and an optical transmission assembly. After passing through the optical transmission assembly, the signal light emitted by the optical emission element is partially transmitted to the main adapter and partially transmitted to the auxiliary adapter; the signal light incident from the main adapter and the signal light incident from the sub-adapter are transmitted to the light receiving element by the light transmitting member, respectively. The beneficial effects of this application are be convenient for realize double-circuit communication, communication safety is brand-new and stability is high, and optical power loss is less.
Description
Technical Field
The present application relates to the field of optical communications, and in particular, to an optical module, an optical communication device, and an optical communication network.
Background
The known optical communication module adopts a double-fiber module, two receiving and transmitting ends of the double-fiber module are respectively connected with two optical fibers for transmitting and receiving signals, the receiving and transmitting functions of the signals can be realized under the condition that the two optical fibers are normal, the problem that communication cannot be realized due to the fact that a single optical fiber is damaged exists, and the communication safety and stability are low.
Disclosure of Invention
The application aims to provide an optical module, optical communication equipment and an optical communication network so as to solve the problem that the communication safety and stability of the known double-fiber module are low.
Embodiments of the present application are implemented as follows:
the application provides an optical module, which comprises an optical transmitting element, an optical receiving element, a main adapter, a secondary adapter and an optical transmission assembly. After passing through the light transmission assembly, the signal light emitted by the light emitting element is partially transmitted to the main adapter and partially transmitted to the auxiliary adapter; the signal light incident from the main adapter and the signal light incident from the sub-adapter are transmitted to the light receiving element by the light transmitting member, respectively. Wherein the light transmission assembly comprises a first optical lens. The first optical lens is obliquely opposed to the light emitting element and the first optical lens is obliquely opposed to the light receiving element; the first optical lens is capable of dividing the signal light emitted from the light emitting element into a transmission portion transmitted through the first optical lens and a reflection portion reflected by the first optical lens, the transmission portion being for transmission to the main adapter, the reflection portion being for transmission to the sub-adapter, and the incident signal light from the main adapter being capable of being reflected to the light receiving element via the first optical lens, and the incident signal light from the sub-adapter being capable of being transmitted to the light receiving element via the first optical lens.
In one possible embodiment, the light transmission assembly further comprises a second optical lens;
the light emitting element, the first optical lens and the main adapter are sequentially arranged along a first direction; the light receiving element, the first optical lens and the second optical lens are sequentially arranged along a second direction; the first direction is perpendicular to the second direction, the first optical lens forms an included angle of 45 degrees with the first direction, and the second optical lens is parallel to the first optical lens;
the main adapter and the auxiliary adapter are arranged at intervals in parallel along a second direction, the auxiliary adapter corresponds to the second optical lens along a first direction, and the light transmission direction of the main adapter and the light transmission direction of the auxiliary adapter are parallel to the first direction.
In one possible embodiment, the optical module further includes an optical isolator provided between the light emitting element and the first optical lens, the optical isolator allowing the signal light emitted from the light emitting element to pass therethrough, and the optical isolator at least partially isolating the light incident from the main adapter or the sub-adapter from entering the light emitting element.
In one possible embodiment, the optical module further includes a focusing lens disposed between the first optical lens and the second optical lens for focusing the light reflected from the first optical lens.
In a possible embodiment, the light module further comprises a mount;
the seat piece is provided with a first pore canal, a second pore canal and a third pore canal, the first pore canal and the second pore canal extend along a first direction respectively and are parallel to each other at intervals, the third pore canal extends along a second direction, the third pore canal and the first pore canal intersect at a first communication port, and the third pore canal and the second pore canal intersect at a second communication port;
the light emitting element and the main adapter are respectively connected to two ends of the first pore canal, and the first optical lens is arranged at the first communication port;
the light receiving element and the second optical lens are respectively connected to two ends of the third pore canal, the auxiliary adapter is connected to the port of the same side of the second pore canal as the main adapter, and the second optical lens is positioned at the second communication port and obliquely corresponds to the auxiliary adapter.
In one possible implementation manner, the optical module further includes a 0-degree optical filter, where the 0-degree optical filter is disposed between the first optical lens and the light receiving element, and is used to isolate light with wavelengths other than the light signal received by the light receiving element.
The application also provides an optical communication device, which comprises a first wavelength division multiplexer, a second wavelength division multiplexer and a plurality of optical modules;
the main adapters of the optical modules are respectively and optically connected to the first wavelength division multiplexer, and the auxiliary adapters of the optical modules are respectively and optically connected to the second wavelength division multiplexer so as to form a main optical path channel and an auxiliary optical path channel;
wherein, the main light path channel is including: a part of the optical signal emitted by the optical emission element passes through the optical transmission assembly and the main adapter to a main light-out path of a first wavelength division multiplexer, and enters a main receiving light path of the optical receiving element through the main adapter and the optical transmission assembly by incidence of the first wavelength division multiplexer;
the secondary light path channel comprises: the other part of the optical signal emitted by the optical emission element passes through the optical transmission assembly and the auxiliary adapter to the auxiliary light-emitting path of the second wavelength division multiplexer, and enters the auxiliary receiving path of the optical receiving element through the auxiliary adapter and the optical transmission assembly by the incidence of the second wavelength division multiplexer.
In one possible embodiment, the primary adapter and the first wavelength division multiplexer, and the secondary adapter and the second wavelength division multiplexer are connected by optical fibers respectively.
In one possible implementation manner, the number of the optical modules is 6, so as to realize the transceiving of optical signals with 6 different wavelengths; the first wavelength division multiplexer and the second wavelength division multiplexer are 6-channel coarse wavelength division multiplexers.
The present application also provides an optical communications network comprising:
two of the aforementioned optical communication devices;
the main channel optical fiber is in communication connection between the first wavelength division multiplexers of the two optical communication devices;
and the secondary channel optical fiber is in communication connection between the second wavelength division multiplexers of the two optical communication devices.
In one possible embodiment, an optical switch is provided on the secondary channel fiber, and the optical switch is used for switching on or off the secondary channel fiber.
In one possible embodiment, one of the optical communication devices is an AAU and the other of the optical communication devices is a BBU.
The optical module can realize the receiving and transmitting of optical signals through the main adapter and can also realize the receiving and transmitting of optical signals through the auxiliary adapter, so that the stability of communication can be improved. For example, the system provided with the optical module can receive a light signal through the optical path of the main adapter in normal use; if the optical path of the main adapter fails, the optical path of the auxiliary adapter can be used for receiving the light signal, so that redundancy is provided for the stability and reliability of the communication system on the basis of not increasing the number of the optical modules. And the optical module for realizing the main and auxiliary dual-path receiving and transmitting has the effect of obviously reducing the optical power loss compared with the optical module which is additionally provided with an optical divider and other devices.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly describe the drawings in the embodiments, it being understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a three-dimensional view of an optical module in an embodiment of the present application;
FIG. 2 is an expanded view of the light module of FIG. 1;
FIG. 3 is a cross-sectional view of the optical module of FIG. 1;
FIG. 4 is a cross-sectional view of a mount of the light module of FIG. 3;
fig. 5 is a block diagram of an optical communication network in an embodiment of the present application;
fig. 6 is a block diagram of a comparative example.
Description of main reference numerals: the optical module 10, the mount 11, the light emitting element 12, the light receiving element 13, the main adapter 14, the sub-adapter 15, the light transmission module 16, the first optical lens 17, the second optical lens 18, the optical isolator 19, the 0-degree optical filter 20, the focusing lens 21, the sealing tube 22, the adjusting ring 23, the first duct K1, the second duct K2, the third duct K3, the first communication port D1, the second communication port D2, the side face P1, the top face P2, the first direction Y1, the second direction Y2, the optical communication network 300, the optical communication device 100, the main channel optical fiber 41, the sub-channel optical fiber 42, the first wavelength division multiplexer 43, the second wavelength division multiplexer 44, the optical switch 45, the optical fibers 46a,46b, the single-pass light receiving and emitting module 60, the 12-pass MWDM wavelength division multiplexer 61, the 1-division 2 optical splitter 62, the main channel optical fiber 63, the sub-channel optical fiber 64, the 2:1 optical switch 65, 66a,66b.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.
Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.
Examples
Referring to fig. 1 to 4, the present embodiment proposes an optical module 10 including a mount 11, a light emitting element 12, a light receiving element 13, a main adapter 14, a sub-adapter 15, and an optical transmission assembly 16. The seat member 11 is used as a mounting base of the light emitting element 12, the light receiving element 13, the main adapter 14, the auxiliary adapter 15 and the light transmission assembly 16, so that the light module 10 forms a whole member, and is convenient to assemble and use. The seat member 11 may be of one unitary construction. In other embodiments, the seat member 11 may be formed of multiple parts as required, and other components of the optical module 10 may be distributed on different parts, which is not limited herein.
After passing through the optical transmission assembly 16, the signal light emitted by the optical emission element 12 is partially transmitted to the main adapter 14 and partially transmitted to the sub-adapter 15; the signal light incident from the main adapter 14 and the signal light incident from the sub-adapter 15 are transmitted to the light receiving element 13 by the light transmitting member 16, respectively.
The optical module 10 in this embodiment can implement the transmission and reception of optical signals through the main adapter 14, and can also implement the transmission and reception of optical signals through the sub-adapter 15, so that the stability of communication can be improved. For example, the system of the present optical module 10 can receive and transmit optical signals through the optical path of the main adapter 14 during normal use; if the optical path of the main adapter 14 fails, the optical path of the sub adapter 15 can be used to receive the light signal, so that redundancy is provided for the stability and reliability of the communication system without increasing the number of the optical modules 10. The optical module 10 for realizing the main/sub two-way transmission/reception has an effect of significantly reducing optical power loss, as compared with an optical splitter or the like, which will be described in detail below.
The light transmission assembly 16 includes a first optical lens 17. The first optical lens 17 is obliquely opposed to the light emitting element 12 and the first optical lens 17 is obliquely opposed to the light receiving element 13, and the inclination angle may be 45 °. The first optical lens 17 can divide the signal light emitted from the light emitting element 12 into a transmission portion transmitted through the first optical lens 17 for transmission to the main adapter 14 and a reflection portion reflected by the first optical lens 17 for transmission to the sub-adapter 15, and the incident signal light from the main adapter 14 can be reflected to the light receiving element 13 via the first optical lens 17 and the incident signal light from the sub-adapter 15 can be transmitted to the light receiving element 13 via the first optical lens 17.
In this embodiment, the first optical lens 17 may alternatively be a semi-transmissive and semi-reflective filter (e.g., a 50% light transmissive, 50% light reflective filter).
In this embodiment, the light transmission assembly 16 further includes a second optical lens 18. The light emitting element 12, the first optical lens 17, and the main adaptor 14 are disposed in this order along the first direction Y1; the light receiving element 13, the first optical lens 17, and the second optical lens 18 are disposed in this order along the second direction Y2; the first direction Y1 and the second direction Y2 are perpendicular, the first optical lens 17 forms an included angle of 45 ° with the first direction Y1, and the second optical lens 18 and the first optical lens 17 are parallel. The main adapter 14 and the sub-adapter 15 are arranged at a parallel interval along the second direction Y2, and the sub-adapter 15 corresponds to the second optical lens 18 along the first direction Y1, and the light transmission direction of the main adapter 14 and the light transmission direction of the sub-adapter 15 are both parallel to the first direction Y1. By providing the second optical lens 18, the light transmission directions of the sub-adapter 15 and the main adapter 14 can be spaced in parallel, so as to facilitate the arrangement of the optical module 10 and the optical path arrangement of the optical path system.
In this embodiment, the second optical lens 18 may be a filter or a mirror that is totally reflective. The second optical lens 18 may be obtained by mirror-finishing the surface of the holder 11.
In this embodiment, the optical module 10 further includes an optical isolator 19, the optical isolator 19 being provided between the light emitting element 12 and the first optical lens 17, the optical isolator 19 allowing the signal light emitted from the light emitting element 12 to pass therethrough, and the optical isolator 19 at least partially isolating the light incident from the main adapter 14 or the sub-adapter 15 from entering the light emitting element 12. In this way, the signal light incident through the main adapter 14 will be isolated by the optical isolator 19 after passing through the first optical lens 17, so as to reduce the influence of this on the light output of the light emitting element 12; similarly, the light of the signal light incident through the sub-adapter 15 after being reflected by the second optical lens 18 and reflected by the first optical lens 17 will be isolated by the optical isolator 19 to reduce the influence of this on the light emitting element 12.
In this embodiment, the optical module 10 further includes a 0-degree filter 20, where the 0-degree filter 20 is disposed between the first optical lens 17 and the light receiving element 13, and is used to isolate light of wavelengths other than the light signal received by the light receiving element 13, so as to reduce the influence of nearby interference light on the light receiving element 13.
In this embodiment, the optical module 10 further includes a focusing lens 21, and the focusing lens 21 is disposed between the first optical lens 17 and the second optical lens 18, for focusing the light reflected by the first optical lens 17. The focusing lens 21 in the present embodiment may be a convex lens or a lens having a convex surface. The inventor found that the light beam reflected by the first optical lens 17 is directly reflected by the second optical lens 18 to enter the sub-adapter 15, which easily causes that the signal light emitted from the light emitting element 12 cannot reach the sub-adapter 15 due to the focal length, whereas the focusing lens 21 is provided at this position in the present embodiment, which allows the light beam to be refocused, thereby smoothly reaching the sub-adapter 15 and being transmitted backward.
In this embodiment, alternatively, the seat member 11 has a substantially block structure and is provided with a first channel K1, a second channel K2 and a third channel K3, the first channel K1 and the second channel K2 extend along the first direction Y1 and are parallel to each other at intervals, the third channel K3 extends along the second direction Y2, the third channel K3 and the first channel K1 intersect at the first communication port D1, and the third channel K3 and the second channel K2 intersect at the second communication port D2. Wherein the first duct K1 is a through hole, which penetrates a set of opposite sides P1 of the seat 11; the second hole K2 is a blind hole, and penetrates into the seat member 11 from one side surface P1 of the seat member 11; the third duct K3 is a blind hole penetrating from the top surface P2 of the seat 11 through the middle of the first duct K1 and connected to the bottom of the second duct K2.
The light emitting element 12 and the main adaptor 14 are respectively connected to both ends of the first duct K1, and the first optical lens 17 is disposed at the first communication port D1. The light receiving element 13 and the second optical lens 18 are respectively connected at both ends of the third duct K3, the sub-adaptor 15 is connected to the port of the second duct K2 on the same side as the main adaptor 14, and the second optical lens 18 is located at the second communication port D2 and is inclined to correspond to the sub-adaptor 15.
Alternatively, the mount 11 is connected with the seal-welded tube 22 at a port where the first duct K1 connects the light emitting element 12, and the light emitting element 12 is mounted to the seal-welded tube 22. The sealing tube body 22 is a generally tubular structure having a stepped hole, which can improve the light sealing degree of the light emitting element 12 from the outside.
Optionally, the seat member 11 is connected with an adjusting ring 23 where the first duct K1 or the second duct K2 is connected with the main adapter 14 or the adapter, and the main adapter 14 and the sub-adapter 15 are respectively connected with the adjusting ring 23 to adjust the positions of the main adapter 14 and the sub-adapter 15.
Referring to fig. 5, the embodiment of the present application further provides an optical communication network 300, including two optical communication devices 100, a main channel optical fiber 41 and a sub-channel optical fiber 42. The main channel optical fiber 41 and the sub channel optical fiber 42 are respectively connected between the two optical communication devices 100 for communication of the two optical communication devices 100, thereby realizing redundancy.
The optical communication device 100 may be a common communication device, such as an AAU, BBU, or the like. The optical communication network 300 shown in fig. 5 is a network that enables communication between an AAU and a BBU, i.e., one of the optical communication devices 100 is an AAU and the other optical communication device 100 is a BBU.
The optical communication device 100 in this embodiment includes a first wavelength division multiplexer 43, a second wavelength division multiplexer 44, and a plurality of optical modules 10. It should be noted that the optical module 10 in fig. 5 is shown in a simple and illustrated manner, and details thereof are not shown, and specific structures thereof can be seen in fig. 1 to 4. Wherein the first wavelength division multiplexer 43, the second wavelength division multiplexer 44 may be a coarse wavelength division multiplexer (Coarse Wavelength Division Multiplexer, CWDM). Taking the number of the optical modules 10 as six as an example, the six optical modules 10 respectively realize the transmission and the reception of optical signals with different wavelengths, and the corresponding first wavelength division multiplexer 43 and the second wavelength division multiplexer 44 are 6-channel coarse wavelength division multiplexers.
The primary adapters 14 of each optical module 10 are respectively optically communicatively coupled (e.g., via optical fibers 46 a) to a first wavelength division multiplexer 43, and the secondary adapters 15 of each optical module 10 are respectively optically communicatively coupled (e.g., via optical fibers 46 b) to a second wavelength division multiplexer 44 to form a primary optical path channel and a secondary optical path channel.
The main light path channel includes: a part of the optical signal emitted from the optical transmitting element 12 passes through the optical transmission component 16 and the main adapter 14 to the main output optical path of the first wavelength division multiplexer 43, and enters the main receiving optical path of the optical receiving element 13 through the main adapter 14 and the optical transmission component 16 by being incident on the first wavelength division multiplexer 43;
the minor light path channel comprises: another part of the optical signal emitted from the optical emitting element 12 is incident on the second wavelength division multiplexer 44 via the optical transmission unit 16 and the sub-adapter 15 to the sub-output optical path of the second wavelength division multiplexer 44, and is incident on the sub-receiving optical path of the optical receiving element 13 via the sub-adapter 15 and the optical transmission unit 16.
The transmission of optical signals in the optical transmission assembly 16 in the main optical path and the auxiliary optical path is described in the Wen Duiguang module 10.
The main channel fiber 41 is communicatively coupled between the first wavelength division multiplexers 43 of two optical communication devices 100 (illustrated as AAU and BBU). The sub-channel optical fiber 42 is communicatively coupled between the second wavelength division multiplexers 44 of the two optical communication devices 100. Optionally, an optical switch 45 is provided on the sub-channel fiber 42, and the optical switch 45 is used to switch on or off the sub-channel fiber 42.
Thus, in the normal operation state, the optical switch 45 on the sub-channel optical fiber 42 is kept in the off state, and the two optical communication devices 100 communicate with each other through the main channel optical fiber 41; the optical path at this time is: the optical signal emitted by the optical transmitting element 12 of each optical module 10 of the first optical communication device 100 (e.g., AAU) is transmitted (e.g., transmitted through the optical fiber 46 a) to the first wavelength division multiplexer 43 via the main channel optical fiber 41, and then transmitted to the first wavelength division multiplexer 43 of another optical communication device 100 (e.g., BBU) and further transmitted to the main adapter 14 of each optical module 10 of the other optical communication device 100 (e.g., BBU), so as to be transmitted to the corresponding optical receiving element 13; the optical path from another optical communication device 100 (e.g., BBU) to the first optical communication device 100 (e.g., AAU) is opposite to the above-described transmission direction, and is not described herein.
When the main channel optical fiber 41 cannot normally communicate due to damage, the optical switch 45 on the sub channel optical fiber 42 is closed (e.g. manually closed or controlled to automatically close when the main channel optical fiber 41 is detected to be unable to communicate), the optical signal of each optical module 10 can still be transmitted through the second wavelength division multiplexer 44, so as to ensure that the communication continues normally.
Comparative example
Fig. 6 shows a network architecture known to the inventors for implementing AAU and BBU communication. Referring to fig. 6, in the network architecture, the structures of the AAU and the BBU are: six single-channel light receiving and emitting modules 60 are respectively connected to a 12-channel MWDM wavelength division multiplexer 61 through two optical fibers 66a and 66b (optical fiber 66a is used for transmitting optical signals and optical fiber 66b is used for receiving optical signals), the 12-channel MWDM wavelength division multiplexer 61 of the AAU is connected to a main channel optical fiber 63 and a secondary channel optical fiber 64 in two through a 1-to-2 optical splitter 62, and at the BBU end, the main channel optical fiber 63 and the secondary channel optical fiber 64 are connected to the 12-channel MWDM wavelength division multiplexer 61 of the BBU through a 2:1 optical switch 65 combination, so that two-channel communication of the main channel and the secondary channel is realized.
By comparative analysis, the 12-way MWDM wavelength division multiplexer 61 used in the transmission scheme of the comparative example shown in fig. 6 has an optical power loss of about 3dB and a high equipment economic cost. Meanwhile, at the position of the 2:1 optical switch 65, the optical power loss of about 1.5dB is also achieved, and the optical power loss of the two positions reaches about 4.5dB, so that higher requirements are also put on the output optical power of the optical module, the material cost of related light emitting components is higher, and the process difficulty is also higher.
With the optical communication network 300 (as shown in the embodiment of fig. 5) of the embodiment of the present application, the optical power loss of the optical switch 45 added to the 6-way CWDM wavelength division multiplexer (the aforementioned first wavelength division multiplexer 43/the second wavelength division multiplexer 44) is about 1.5dB, which is about 3dB less than the optical power loss of the aforementioned 12-way MWDM wavelength division multiplexer 61 added to the 2:1 optical switch 65, which provides a space for the output optical power of the optical module, and also provides a sufficient residual amount of the output optical power for the optical device used in the embodiment, so that the related design scheme is truly feasible.
As can be seen from the above description, by adopting the technical solution in the embodiment of the present application, the optical module 10 can implement the scheme of combining the main/auxiliary dual-adapter with the main/auxiliary optical path communication by only one optical transmitting element 12 and one optical receiving element 13, so that the redundant design of communication can be implemented with a lower cost and a more compact structure, the safety and stability of communication are improved, and the optical power loss is significantly reduced (as compared with the comparative example, the optical power loss is reduced from 4.5dB to 1.5dB, the reduction ratio reaches 2/3), the communication energy consumption is saved, the use cost is reduced, and the application value is very high.
The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.
Claims (6)
1. An optical communications network, characterized by:
the device comprises a main channel optical fiber, a secondary channel optical fiber and two optical communication devices;
the optical communication equipment comprises a first wavelength division multiplexer, a second wavelength division multiplexer and a plurality of optical modules;
the optical module comprises an optical emission element, an optical receiving element, a main adapter, a secondary adapter and an optical transmission assembly; after the signal light emitted by the light emitting element passes through the light transmission component, part of the signal light is transmitted to the main adapter and part of the signal light is transmitted to the auxiliary adapter, one of the part of the signal light transmitted to the main adapter and the part of the signal light transmitted to the auxiliary adapter is used as the signal light for optical communication, and the other optical path is disconnected; one of the signal light incident by the main adapter and the signal light incident by the sub-adapter is transmitted to the light receiving element by the light transmitting member, serving as signal light for optical communication; the light transmission assembly includes a first optical lens obliquely opposed to the light emitting element and obliquely opposed to the light receiving element; the first optical lens is capable of dividing the signal light emitted from the light emitting element into a transmission portion transmitted through the first optical lens and a reflection portion reflected by the first optical lens, the transmission portion being for transmission to the main adapter, the reflection portion being for transmission to the sub-adapter, and the signal light incident by the main adapter being reflected to the light receiving element via the first optical lens, the signal light incident by the sub-adapter being transmitted to the light receiving element via the first optical lens;
the main adapters of the optical modules are respectively and optically connected to the first wavelength division multiplexer, and the auxiliary adapters of the optical modules are respectively and optically connected to the second wavelength division multiplexer so as to form a main optical path channel and an auxiliary optical path channel;
wherein, the main light path channel is including: a part of the optical signal emitted by the optical emission element passes through the optical transmission assembly and the main adapter to a main light-out path of a first wavelength division multiplexer, and enters a main receiving light path of the optical receiving element through the main adapter and the optical transmission assembly by incidence of the first wavelength division multiplexer;
the secondary light path channel comprises: another part of the optical signal emitted by the optical emission element passes through the optical transmission assembly and the auxiliary adapter to an auxiliary light-emitting path of a second wavelength division multiplexer, and enters an auxiliary receiving path of the optical receiving element through the auxiliary adapter and the optical transmission assembly by incidence of the second wavelength division multiplexer;
the main adapter and the first wavelength division multiplexer and the auxiliary adapter and the second wavelength division multiplexer are respectively connected through optical fibers;
the main channel optical fiber is in communication connection between the first wavelength division multiplexers of the two optical communication devices;
the secondary channel optical fiber is in communication connection between the second wavelength division multiplexers of the two optical communication devices;
the optical switch is arranged on the auxiliary channel optical fiber and is used for switching on or switching off the auxiliary channel optical fiber.
2. An optical communication network according to claim 1, characterized in that:
the light transmission assembly further includes a second optical lens;
the light emitting element, the first optical lens and the main adapter are sequentially arranged along a first direction; the light receiving element, the first optical lens and the second optical lens are sequentially arranged along a second direction; the first direction is perpendicular to the second direction, the first optical lens forms an included angle of 45 degrees with the first direction, and the second optical lens is parallel to the first optical lens;
the main adapter and the auxiliary adapter are arranged at intervals in parallel along a second direction, the auxiliary adapter corresponds to the second optical lens along a first direction, and the light transmission direction of the main adapter and the light transmission direction of the auxiliary adapter are parallel to the first direction.
3. An optical communication network according to claim 2, characterized in that:
the optical module further includes an optical isolator provided between the light emitting element and the first optical lens, the optical isolator allowing the signal light emitted from the light emitting element to pass therethrough, and the optical isolator at least partially isolating light incident from the main adapter or the sub-adapter from entering the light emitting element.
4. An optical communication network according to claim 2, characterized in that:
the optical module further includes a focusing lens disposed between the first optical lens and the second optical lens for focusing light of the reflection portion reflected by the first optical lens.
5. An optical communication network according to claim 2, characterized in that:
the optical module further comprises a seat member;
the seat piece is provided with a first pore canal, a second pore canal and a third pore canal, the first pore canal and the second pore canal extend along a first direction respectively and are parallel to each other at intervals, the third pore canal extends along a second direction, the third pore canal and the first pore canal intersect at a first communication port, and the third pore canal and the second pore canal intersect at a second communication port;
the light emitting element and the main adapter are respectively connected to two ends of the first pore canal, and the first optical lens is arranged at the first communication port;
the light receiving element and the second optical lens are respectively connected to two ends of the third pore canal, the auxiliary adapter is connected to the port of the same side of the second pore canal as the main adapter, and the second optical lens is positioned at the second communication port and obliquely corresponds to the auxiliary adapter.
6. An optical communication network according to claim 1, characterized in that:
the number of the optical modules is 6, and the optical modules are used for realizing the receiving and transmitting of optical signals with 6 different wavelengths;
the first wavelength division multiplexer and the second wavelength division multiplexer are 6-channel coarse wavelength division multiplexers.
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