CN112929123B - Optical transmission system, method and optical communication system - Google Patents
Optical transmission system, method and optical communication system Download PDFInfo
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- CN112929123B CN112929123B CN201911237766.0A CN201911237766A CN112929123B CN 112929123 B CN112929123 B CN 112929123B CN 201911237766 A CN201911237766 A CN 201911237766A CN 112929123 B CN112929123 B CN 112929123B
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- H04J14/02—Wavelength-division multiplex systems
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Abstract
The present disclosure relates to an optical transmission system, an optical transmission method, and an optical communication system, and relates to the technical field of optical communication. The system of the present disclosure includes: a plurality of single-fiber bidirectional optical modules and a wave-combining and wave-dividing device; each single-fiber bidirectional optical module is connected with the wave combining and dividing device through a single optical fiber; the wavelengths of the optical signals processed by the single-fiber bidirectional optical modules are different; each single-fiber bidirectional optical module is configured to transmit an optical signal to the multiplexer/demultiplexer through a single optical fiber connected with the multiplexer/demultiplexer, and receive the optical signal transmitted by the multiplexer/demultiplexer through the single optical fiber; the wave combining and dividing device is configured to couple the optical signals sent by each single-fiber bidirectional optical module into one-path coupling optical signals to be sent out, and decouple the received coupling optical signals into multiple paths of optical signals to be sent to the corresponding single-fiber bidirectional modules.
Description
Technical Field
The present disclosure relates to the field of optical communications technologies, and in particular, to an optical transmission system, an optical transmission method, and an optical communication system.
Background
The 5G frequency band is higher than 4G, and the number of base stations is large under the full coverage condition. For example, if a 5G forwarding device (such as a baseband processing unit) adopts a mode of directly driving optical fibers, a single device needs 3-core or 6-core optical fibers, which causes a large pressure on the existing base station optical cable network. The wavelength division scheme can converge the optical fibers at 1:N (N is up to 40 in maximum), and a large number of base station optical fibers are saved. Therefore, the method has good application prospect in 5G forwarding equipment.
In the existing wavelength division scheme, as shown in fig. 1, N optical modules are needed to be in butt joint with 2N tail fibers of a wave combining and dividing device in the system, each optical module is connected with the wave combining and dividing device through two optical fibers, and when the optical modules are connected, a receiving end and a transmitting end of the optical module are needed to be distinguished, otherwise, the optical modules cannot be used due to wiring errors.
Disclosure of Invention
The inventors found that: the existing wavelength division scheme leads to higher wiring complexity of the optical module and the wave combining and dividing device, leads to wiring errors easily, and reduces the opening efficiency of 5G front-end equipment.
One technical problem to be solved by the present disclosure is: how to reduce the wiring complexity of the optical module and the wave combining and dividing device and improve the opening efficiency of the 5G front-end equipment.
According to some embodiments of the present disclosure, there is provided an optical transmission system including: a plurality of single-fiber bidirectional optical modules and a wave-combining and wave-dividing device; each single-fiber bidirectional optical module is connected with the wave combining and dividing device through a single optical fiber; the wavelengths of the optical signals processed by the single-fiber bidirectional optical modules are different; each single-fiber bidirectional optical module is configured to transmit an optical signal to the multiplexer/demultiplexer through a single optical fiber connected with the multiplexer/demultiplexer, and receive the optical signal transmitted by the multiplexer/demultiplexer through the single optical fiber; the wave combining and dividing device is configured to couple the optical signals sent by each single-fiber bidirectional optical module into one-path coupling optical signals to be sent out, and decouple the received coupling optical signals into multiple paths of optical signals to be sent to the corresponding single-fiber bidirectional modules.
In some embodiments, the multiplexer-demultiplexer includes a plurality of dual wavelength filters; each dual-wavelength filter is connected with a corresponding single-fiber bidirectional optical module; the wavelength of the optical signal processed by each dual wavelength filter is different; the dual wavelength filter is configured to receive the optical signal sent by the corresponding single-fiber bidirectional optical module, and output the optical signal to the adjacent dual wavelength filter or to the sending interface of the wave combining and dividing device; and filtering the coupled optical signals received by the receiving interfaces of the adjacent dual-wavelength filters or the wave-combining and wave-dividing devices to obtain optical signals with corresponding wavelengths, and sending the optical signals to the corresponding single-fiber bidirectional optical modules.
In some embodiments, the multiplexer/demultiplexer includes: a plurality of single wavelength filters and a plurality of wavelength division multiplexing modules; the wavelength division multiplexing module is connected with the corresponding single-fiber bidirectional optical module; the wavelength of the optical signal processed by each single wavelength filter is different; the single wavelength filter is configured to filter the coupled optical signals received by the receiving interfaces of the adjacent single wavelength filters or the wave combining and dividing devices to obtain optical signals with corresponding wavelengths, and input the optical signals into the corresponding wave division multiplexing modules; receiving optical signals sent by the corresponding wavelength division multiplexing modules, and outputting the optical signals to adjacent single-wavelength filters or to a sending interface of a wave combining and dividing device; the wavelength division multiplexing module is configured to receive two optical signals with different wavelengths input by the corresponding single-wavelength filter and send the optical signals to the corresponding single-fiber bidirectional optical module; and receiving the optical signals sent by the corresponding single-fiber bidirectional optical modules and sending the optical signals to the corresponding single-wavelength filters.
In some embodiments, a single fiber bi-directional optical module includes: a transmitter, a receiver and a wavelength division multiplexing module; the transmitter and the receiver are respectively connected with the wavelength division multiplexing module; the wavelength division multiplexing module is connected with the wave combining and dividing device through a single optical fiber; the wavelength of the optical signals processed by the transmitter and the receiver are different; the transmitter is configured to receive the electrical signal and convert the electrical signal into an optical signal for transmission to the wavelength division multiplexing module; the receiver is configured to receive the optical signal sent by the wavelength division multiplexing module, and convert the optical signal into an electrical signal to be sent out; the wavelength division multiplexing module is configured to receive the optical signals sent by the transmitter and send the optical signals to the wave combining and dividing device through a single optical fiber; the optical signals sent by the wave combining and dividing device through a single optical fiber are received and sent to a receiver.
In some embodiments, the wavelength division multiplexing module comprises: wavelength division multiplexer or circulator.
According to further embodiments of the present disclosure, there is provided an optical communication system including: the two optical transmission systems of any one of claims 1-5; the two optical transmission systems are respectively used as a first optical transmission system and a second optical transmission system; the wave combining and dividing device of the first optical transmission system is connected with the wave combining and dividing device of the second optical transmission system through a single optical fiber.
According to still further embodiments of the present disclosure, there is provided an optical transmission method including: each single-fiber bidirectional optical module transmits optical signals to the wave-combining and wave-dividing device through a single optical fiber connected with the wave-combining and wave-dividing device; the wave combining and dividing device couples the optical signals sent by each single-fiber bidirectional optical module into one path of coupled optical signals to be sent out; the wave combining and dividing device decouples the received coupling optical signals into a plurality of paths of optical signals and sends the optical signals to the corresponding single-fiber bidirectional module; each single-fiber bidirectional optical module receives an optical signal sent by the wave combining and dividing device through a single optical fiber connected with the wave combining and dividing device; wherein, the wavelength of the optical signals processed by each single-fiber bidirectional optical module is different.
In some embodiments, the multiplexer-demultiplexer includes a plurality of dual wavelength filters; each dual-wavelength filter is connected with a corresponding single-fiber bidirectional optical module; the wavelength of the optical signal processed by each dual wavelength filter is different; the wave combining and dividing device couples the optical signals sent by the single-fiber bidirectional optical modules into one path of coupled optical signals to be sent out, and the wave combining and dividing device comprises: each dual-wavelength filter receives the optical signals sent by the corresponding single-fiber bidirectional optical module, and outputs the optical signals to the adjacent dual-wavelength filter or to the sending interface of the wave combining and dividing device; the wave combining and dividing device decouples the received coupled optical signals into a plurality of paths of optical signals and sends the optical signals to the corresponding single-fiber bidirectional mode, and the wave combining and dividing device comprises: each dual-wavelength filter filters the coupled optical signals received by the receiving interfaces of the adjacent dual-wavelength filters or the wave combining and dividing devices to obtain optical signals with corresponding wavelengths, and sends the optical signals to the corresponding single-fiber bidirectional optical modules.
In some embodiments, the multiplexer/demultiplexer includes: a plurality of single wavelength filters and a plurality of wavelength division multiplexing modules; the wavelength division multiplexing module is connected with the corresponding single-fiber bidirectional optical module; the wavelength of the optical signal processed by each single wavelength filter is different; the wave combining and dividing device couples the optical signals sent by the single-fiber bidirectional optical modules into one path of coupled optical signals to be sent out, and the wave combining and dividing device comprises: the wavelength division multiplexing module receives the optical signals sent by the corresponding single-fiber bidirectional optical module and sends the optical signals to the corresponding single-wavelength filter; the single wavelength filter receives the optical signal sent by the corresponding wavelength division multiplexing module and outputs the optical signal to the adjacent single wavelength filter or to the sending interface of the wave combining and dividing device; the wave combining and dividing device decouples the received coupled optical signals into a plurality of paths of optical signals and sends the optical signals to the corresponding single-fiber bidirectional mode, and the wave combining and dividing device comprises: the single wavelength filter filters the coupled optical signals received by the receiving interfaces of the adjacent single wavelength filters or the wave combining and dividing devices to obtain optical signals with corresponding wavelengths, and the optical signals are input into the corresponding wave division multiplexing modules; the wavelength division multiplexing module receives two optical signals with different wavelengths input by the corresponding single-wavelength filter and sends the optical signals to the corresponding single-fiber bidirectional optical module.
In some embodiments, a single fiber bi-directional optical module includes: a transmitter, a receiver and a wavelength division multiplexing module; the transmitter and the receiver are respectively connected with the wavelength division multiplexing module; the wavelength division multiplexing module is connected with the wave combining and dividing device through a single optical fiber; the wavelength of the optical signals processed by the transmitter and the receiver are different; each single-fiber bidirectional optical module transmits an optical signal to the multiplexer/demultiplexer through a single optical fiber connected with the multiplexer/demultiplexer, and comprises: the transmitter receives the electric signal, converts the electric signal into an optical signal and sends the optical signal to the wavelength division multiplexing module; the wavelength division multiplexing module receives the optical signals sent by the transmitter and sends the optical signals to the wave combining and dividing device through a single optical fiber; each single-fiber bidirectional optical module receives an optical signal sent by a wave combining and dividing device through a single optical fiber connected with the wave combining and dividing device, and the optical signal comprises: the wavelength division multiplexing module receives the optical signals sent by the wave combining and dividing device through a single optical fiber and sends the optical signals to the receiver; the receiver receives the optical signal sent by the wavelength division multiplexing module and converts the optical signal into an electrical signal to be sent out.
In the method, the single-fiber bidirectional optical module can be connected with the wave combining and dividing device through a single optical fiber, and the wave combining and dividing device can process bidirectional optical signals transmitted on the single optical fiber, so that 50% of wiring between the optical module and the wave combining and dividing device is reduced, and resources are saved. And adopt single-fiber two-way optical module, under the condition of being connected through single optic fibre, optical module only has an interface to no longer need distinguish receiving end and transmitting end, can not lead to the wiring error, has reduced the wiring complexity of optical module and wave combining and dividing ware, has improved the opening efficiency of 5G preceding transmission equipment.
Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 shows a schematic diagram of a prior art wavelength division scheme.
Fig. 2 illustrates a schematic structural diagram of an optical transmission system of some embodiments of the present disclosure.
Fig. 3 illustrates a schematic structure of a single fiber bi-directional optical module in accordance with some embodiments of the present disclosure.
Fig. 4A illustrates a schematic structure of a wave combiner-divider of some embodiments of the present disclosure.
Fig. 4B shows a schematic structural diagram of a multiplexer-demultiplexer according to other embodiments of the present disclosure.
Fig. 4C illustrates a schematic structure of a multiplexer-demultiplexer according to further embodiments of the present disclosure.
Fig. 4D illustrates a schematic structure of a multiplexer-demultiplexer in accordance with further embodiments of the present disclosure.
Fig. 5 illustrates a schematic structural diagram of an optical communication system of some embodiments of the present disclosure.
Fig. 6 illustrates a flow diagram of an optical transmission method of some embodiments of the present disclosure.
Detailed Description
The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.
The present disclosure provides an optical transmission system, described below in conjunction with fig. 2.
Fig. 2 is a block diagram of some embodiments of an optical transmission system of the present disclosure. As shown in fig. 2, the system 20 of this embodiment includes: a plurality of single fiber bi-directional optical modules 210; a multiplexer/demultiplexer 220.
Each single-fiber bi-directional optical module 210 is connected to a multiplexer/demultiplexer 220 by a single optical fiber 230. The wavelengths of the optical signals processed by the individual single fiber bi-directional optical modules 210 are different. Each single fiber bi-directional optical module 210 can process optical signals at two wavelengths. In some embodiments, as shown in fig. 3, each single fiber bi-directional optical module 210 includes: a transmitter 212, a receiver 214, and a wavelength division multiplexing module 216. The wavelength of the optical signals that may be emitted by the emitters 212 in each single fiber bi-directional optical module 210 is different, as is the wavelength of the optical signals that may be received by the receivers 214 in each single fiber bi-directional optical module 210. The wavelength of the optical signals processed by the transmitter 212 and the receiver 214 of each single fiber bi-directional optical module 210 is also different. For example, a single fiber bi-directional optical module 210 of 1271 may enable transmission of optical signals having a wavelength of 1271nm and reception of optical signals having a wavelength of 1291 nm.
As shown in fig. 3, the transmitter 212 and the receiver 214 are respectively connected to a wavelength division multiplexing module. The transmitter 212 is configured to receive an externally input electrical signal and convert the electrical signal into an optical signal to be transmitted to the wavelength division multiplexing module 216. The receiver 214 is configured to receive the optical signal sent by the wavelength division multiplexing module 216, and convert the optical signal into an electrical signal to be sent out to the outside of the single-fiber bidirectional optical module 210. The wavelength division multiplexing module 216 is configured to receive the optical signal sent by the transmitter 212 and send the optical signal to the multiplexer/demultiplexer 220 through a single optical fiber; the optical signal transmitted by the multiplexer/demultiplexer 220 through a single optical fiber is received and transmitted to the receiver 214.
The wavelength division multiplexing module 216 can provide optical paths for optical signals with different wavelengths by adopting a wavelength division multiplexing technology, and can transmit optical signals with two different wavelengths transmitted by the transmitter 212 and the receiver 214 through one optical fiber and the multiplexer/demultiplexer 220. In some embodiments, the wavelength division multiplexing module 216 includes: wavelength Division Multiplexer (WDM) or circulator, not limited to the illustrated example.
In some embodiments, as shown in fig. 4A, the multiplexer-demultiplexer 220 includes a plurality of dual wavelength filters 222; each dual wavelength filter 222 is connected to a corresponding single fiber bi-directional optical module 210, and may specifically be connected to a wavelength division multiplexing module 216 in the corresponding single fiber bi-directional optical module 210. Each dual wavelength filter 222 processes a different wavelength of the optical signal. The dual wavelength filter 222 may provide an optical path for two different wavelength optical signals. A dual wavelength filter 222 capable of processing optical signals of the same wavelength corresponds to the single-fiber bi-directional optical module 210.
In some embodiments, the dual wavelength filter 222 is configured to receive the optical signal transmitted by the corresponding single fiber bi-directional optical module 210, output to an adjacent dual wavelength filter 222 or output to a transmission interface of the multiplexer-demultiplexer 220; the coupled optical signals received by the receiving interfaces of the adjacent dual wavelength filters 222 or the multiplexer/demultiplexer 220 are filtered to obtain optical signals with corresponding wavelengths, and are transmitted to the corresponding single-fiber bidirectional optical modules 210. The respective dual wavelength filters 222 may be arranged in series.
As shown in fig. 4B, assuming that the wavelengths of the optical signals transmitted in the system are six of 1271nm,1291nm,1311nm,1331nm,1351nm,1371nm, two dual wavelength filters, 1271 to 1291 filters and 1311 to 1331 filters may be provided in the multiplexer-demultiplexer 220. The optical signals with six wavelengths ranging from 1271nm to 1371nm transmitted by the transmitting interface and the receiving interface of the wave combining and dividing device 220 can provide optical paths for 1271nm and 1291nm through the 1271-1291 filter, so that optical signal interaction is carried out with the single-fiber bidirectional optical modules 210 corresponding to 1271nm and 1291 nm. The two wavelength optical signals remaining after passing through the 1271-1291 filters and the 1311-1331 filters can directly interact with the corresponding single-fiber bi-directional optical module 210 through a single optical fiber.
The wave combining and dividing device is changed into a double-wavelength filter from a single-wavelength filter, the number of the filters is reduced by about half, the structure is simpler, and the resources are saved.
In some embodiments, as shown in fig. 4C, the multiplexer-demultiplexer 220 includes: a plurality of single wavelength filters 224 and a plurality of wavelength division multiplexing modules 226. The wavelength division multiplexing module 226 is connected with the corresponding single-fiber bidirectional optical module 210; the wavelength of the optical signal processed by each single wavelength filter 224 is different. The wavelength division multiplexing module 226 capable of processing the same wavelength optical signal corresponds to the single fiber bi-directional optical module 210. The individual single wavelength filters 224 may be arranged in series. The wavelength division multiplexing module 226 may be connected to one or two single wavelength filters 224, and in the case that the single wavelength filter is the last filter, two different wavelengths may be obtained, and thus the wavelength division multiplexing module 226 may be connected to one single wavelength filter 224.
The function of the single wavelength filter 224 and the wavelength division multiplexing module 226 is the same as the function of the dual wavelength filter, belonging to different hardware implementations. In some embodiments, the single wavelength filter 224 is configured to filter the coupled optical signals received by the receiving interfaces of the adjacent single wavelength filter 224 or the multiplexer-demultiplexer 220 to obtain optical signals with corresponding wavelengths, and input the optical signals to the corresponding wavelength division multiplexing module 226; receiving the optical signal sent by the corresponding wavelength division multiplexing module 226, and outputting the optical signal to the adjacent single wavelength filter 224 or to the sending interface of the multiplexer/demultiplexer 220; the wavelength division multiplexing module 226 is configured to receive the two optical signals with different wavelengths input by the corresponding single wavelength filter 224 and send the signals to the corresponding single-fiber bidirectional optical module 210; the optical signal sent by the corresponding single-fiber bi-directional optical module 210 is received and sent to the corresponding single-wavelength filter 224.
As shown in fig. 4D, assuming that the wavelengths of the optical signals transmitted in the system are six of 1271nm,1291nm,1311nm,1331nm,1351nm,1371nm, five single-wavelength filters, 1271 filters, 1291 filters, 1331 filters, 1351 filters, and 1371 filters may be provided in the multiplexer-demultiplexer 220. The optical signals with six wavelengths ranging from 1271nm to 1371nm and transmitted by the transmitting interface and the receiving interface of the multiplexer/demultiplexer 220 can respectively provide optical paths for 1271nm and 1331nm through a 1271 filter and a 1331 filter, and can provide optical paths for 1271nm and 1331nm through a single optical fiber together with the corresponding single-fiber bidirectional optical module after passing through the wavelength division multiplexing module. The optical signals with the wavelength of 1311nm remained through the five filters can be interacted with the corresponding single-fiber bidirectional optical module through a single optical fiber after passing through a wavelength division multiplexing module.
In the embodiment, the single-fiber bidirectional optical module is adopted to replace the original optical module and can be connected with the wave-combining and wave-dividing device through a single optical fiber, and the wave-combining and wave-dividing device can process the bidirectional optical signals transmitted on the single optical fiber through the dual-wavelength filter or the wave-dividing and wave-dividing multiplexing module, so that 50% of wiring between the optical module and the wave-combining and wave-dividing device is reduced, and resources are saved. And adopt single-fiber two-way optical module, under the condition of being connected through single optic fibre, optical module only has an interface to no longer need distinguish receiving end and transmitting end, can not lead to the wiring error, has reduced the wiring complexity of optical module and wave combining and dividing ware, has improved the opening efficiency of 5G preceding transmission equipment.
Some embodiments of the optical communication system of the present disclosure are described below in conjunction with fig. 5.
Fig. 5 is a block diagram of some embodiments of an optical communication system of the present disclosure. As shown in fig. 5, the system 5 of this embodiment includes: the two optical transmission systems 20 of any of the previous embodiments. The two optical transmission systems are respectively a first optical transmission system and a second optical transmission system. The first optical transmission system and the second optical transmission system are designed in pairs, and the number of the single-fiber bidirectional optical modules is the same.
The multiplexer/demultiplexer 220 of the first optical transmission system is connected to the multiplexer/demultiplexer 220 of the second optical transmission system through a single optical fiber. The optical signals with multiple wavelengths are coupled in one path and transmitted between the two wave combining and dividing devices 220.
Each single-fiber bidirectional optical module 210 in the first optical transmission system corresponds to each single-fiber bidirectional optical module 210 in the second optical transmission system one by one, the transmitter 212 in the single-fiber bidirectional optical module 210 in the first optical transmission system is the same as the wavelength of the optical signal processed by the receiver 214 in the corresponding single-fiber bidirectional optical module 210 in the second optical transmission system, and the receiver 214 in the single-fiber bidirectional optical module 210 in the first optical transmission system is the same as the wavelength of the optical signal processed by the transmitter 212 in the single-fiber bidirectional optical module 210 in the corresponding second optical transmission system. For example, the transmitter 212 of the single fiber bi-directional optical module 210 in the first optical transmission system transmits an optical signal having a wavelength of 1271nm, and the receiver 214 of one single fiber bi-directional optical module 210 in the second optical transmission system receives an optical signal having a wavelength of 1271nm.
The workflow of the aforementioned optical transmission system is described below in conjunction with fig. 6.
Fig. 6 is a flow chart of some embodiments of the disclosed optical transmission method. As shown in fig. 6, the method of this embodiment includes: steps S602 to S608. Steps S602 to S604 are executed in parallel with steps S606 to S608.
In step S602, each single-fiber bidirectional optical module 210 transmits an optical signal to the multiplexer/demultiplexer 220 through a single optical fiber connected to the multiplexer/demultiplexer 220.
In some embodiments, the single fiber bi-directional optical module 210 includes: a transmitter 212, a receiver 214, and a wavelength division multiplexing module 216; the transmitter 212 and the receiver 214 are respectively connected with a wavelength division multiplexing module 216; the wavelength division multiplexing module 216 is connected with the wave combining and dividing device 220 through a single optical fiber; the wavelength of the optical signals processed by the transmitter 212 and the receiver 214 are different. The transmitter 212 receives the electrical signal and converts the electrical signal to an optical signal for transmission to the wavelength division multiplexing module 216; the wavelength division multiplexing module 216 receives the optical signal sent by the transmitter 212 and sends the optical signal to the multiplexer/demultiplexer 220 through a single optical fiber.
In step S604, the multiplexer/demultiplexer 220 couples the optical signals sent by the single-fiber bidirectional optical modules 210 into one path of coupled optical signals for sending out.
In some embodiments, the multiplexer-demultiplexer 220 includes a plurality of dual wavelength filters 222; each dual wavelength filter 222 is connected to a corresponding single fiber bi-directional optical module 210; each dual wavelength filter 222 processes a different wavelength of the optical signal. Each of the dual wavelength filters 222 receives an optical signal transmitted from the corresponding single-fiber bi-directional optical module 210, and outputs the optical signal to an adjacent dual wavelength filter 222 or to a transmission interface of the multiplexer/demultiplexer 210.
In some embodiments, the multiplexer/demultiplexer 220 includes: a plurality of single wavelength filters 224 and a plurality of wavelength division multiplexing modules 226; the wavelength division multiplexing module 226 is connected with a corresponding single-fiber bidirectional optical module; the wavelength of the optical signal processed by each single wavelength filter 224 is different; the wavelength division multiplexing module 226 receives the optical signal sent by the corresponding single-fiber bidirectional optical module 210 and sends the optical signal to the corresponding single-wavelength filter 224; the single wavelength filter 224 receives the optical signal sent by the corresponding wavelength division multiplexing module 226, and outputs the optical signal to the adjacent single wavelength filter 224 or to the transmission interface of the multiplexer/demultiplexer 220.
In some embodiments, the multiplexer/demultiplexer 220 transmits the coupled optical signal to another multiplexer/demultiplexer 220 through a single optical fiber, and the other multiplexer/demultiplexer may perform the processing according to the methods of steps S606 to 608.
In step S606, the multiplexer/demultiplexer 220 decouples the received coupled optical signals into multiple optical signals, and sends the multiple optical signals to the corresponding single-fiber bidirectional module 210.
In some embodiments, the multiplexer/demultiplexer 220 may receive the coupled optical signal transmitted by another multiplexer/demultiplexer 220 through a single optical fiber, and the other multiplexer/demultiplexer may perform the processing according to the methods of steps S602 to 604.
In some embodiments, each dual wavelength filter 222 filters the coupled optical signals received by the receiving interface of the adjacent dual wavelength filter 222 or the multiplexer/demultiplexer 220 to obtain optical signals with corresponding wavelengths, and sends the optical signals to the corresponding single-fiber bidirectional optical module 210.
In some embodiments, the single wavelength filter 224 filters the coupled optical signals received by the adjacent single wavelength filter 224 or the receiving interface of the multiplexer/demultiplexer 220 to obtain optical signals with corresponding wavelengths, and inputs the optical signals to the corresponding wavelength division multiplexing module 226; the wavelength division multiplexing module 226 receives the two optical signals with different wavelengths input by the corresponding single wavelength filter 224 and sends the optical signals to the corresponding single-fiber bidirectional optical module 210.
In step S608, each single-fiber bidirectional optical module 210 receives the optical signal transmitted by the multiplexer/demultiplexer 220 through a single optical fiber connected to the multiplexer/demultiplexer 220.
In some embodiments, the wavelength division multiplexing module 216 receives the optical signal transmitted by the multiplexer-demultiplexer 220 over a single optical fiber and transmits it to the receiver 214; the receiver 214 receives the optical signal sent by the wavelength division multiplexing module 216, and converts the optical signal into an electrical signal to send out.
It will be appreciated by those skilled in the art that embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flowchart and/or block of the flowchart illustrations and/or block diagrams, and combinations of flowcharts and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing description of the preferred embodiments of the present disclosure is not intended to limit the disclosure, but rather to enable any modification, equivalent replacement, improvement or the like, which fall within the spirit and principles of the present disclosure.
Claims (6)
1. An optical transmission system, comprising: a plurality of single-fiber bidirectional optical modules and a wave-combining and wave-dividing device; each single-fiber bidirectional optical module is connected with the wave combining and dividing device through a single optical fiber; the wavelengths of the optical signals processed by the single-fiber bidirectional optical modules are different;
each single-fiber bidirectional optical module is configured to transmit an optical signal to the multiplexer/demultiplexer through a single optical fiber connected with the multiplexer/demultiplexer, and receive the optical signal transmitted by the multiplexer/demultiplexer through the single optical fiber;
the wave combining and dividing device is configured to couple the optical signals sent by each single-fiber bidirectional optical module into one-path coupled optical signal to be sent out, and decouple the received coupled optical signals into multiple paths of optical signals to be sent to the corresponding single-fiber bidirectional modules;
wherein, the wave combining and dividing device comprises: a plurality of single wavelength filters and a plurality of wavelength division multiplexing modules; the wavelength division multiplexing module is connected with the corresponding single-fiber bidirectional optical module; the wavelength of the optical signal processed by each single wavelength filter is different;
the single wavelength filter is configured to filter the coupled optical signals received by the adjacent single wavelength filter or the receiving interface of the multiplexer-demultiplexer to obtain optical signals with corresponding wavelengths, and input the optical signals into the corresponding wavelength division multiplexing module; receiving optical signals sent by the corresponding wavelength division multiplexing modules, and outputting the optical signals to adjacent single-wavelength filters or to a sending interface of the wave combining and dividing device;
the wavelength division multiplexing module is configured to receive two optical signals with different wavelengths input by the corresponding single-wavelength filter and send the optical signals to the corresponding single-fiber bidirectional optical module; and receiving the optical signals sent by the corresponding single-fiber bidirectional optical modules and sending the optical signals to the corresponding single-wavelength filters.
2. The optical transmission system of claim 1, wherein,
the single-fiber bidirectional optical module comprises: a transmitter, a receiver and a wavelength division multiplexing module; the transmitter and the receiver are respectively connected with the wavelength division multiplexing module; the wavelength division multiplexing module is connected with the wave combining and dividing device through a single optical fiber; the wavelength of the optical signals processed by the transmitter and the receiver are different;
the transmitter is configured to receive an electrical signal, convert the electrical signal into an optical signal, and send the optical signal to the wavelength division multiplexing module;
the receiver is configured to receive the optical signal sent by the wavelength division multiplexing module, and convert the optical signal into an electrical signal to send out;
the wavelength division multiplexing module is configured to receive the optical signal sent by the transmitter and send the optical signal to the wave combining and dividing device through a single optical fiber; and receiving the optical signals sent by the wave combining and dividing device through the single optical fiber and sending the optical signals to the receiver.
3. The optical transmission system of claim 1, wherein,
the wavelength division multiplexing module includes: wavelength division multiplexer or circulator.
4. An optical communication system, comprising: two optical transmission systems according to any of claims 1-3 as a first optical transmission system and a second optical transmission system, respectively;
the wave combining and dividing device of the first optical transmission system is connected with the wave combining and dividing device of the second optical transmission system through a single optical fiber.
5. An optical transmission method, comprising:
each single-fiber bidirectional optical module transmits an optical signal to the wave-combining and wave-dividing device through a single optical fiber connected with the wave-combining and wave-dividing device;
the wave combining and dividing device couples the optical signals sent by each single-fiber bidirectional optical module into one path of coupled optical signals to be sent out;
the wave combining and dividing device decouples the received coupled optical signals into a plurality of paths of optical signals and sends the optical signals to the corresponding single-fiber bidirectional module;
each single-fiber bidirectional optical module receives an optical signal sent by the wave-combining and wave-dividing device through a single optical fiber connected with the wave-combining and wave-dividing device;
wherein, the wavelength of the optical signals processed by each single-fiber bidirectional optical module is different;
wherein, the wave combining and dividing device comprises: a plurality of single wavelength filters and a plurality of wavelength division multiplexing modules; the wavelength division multiplexing module is connected with the corresponding single-fiber bidirectional optical module; the wavelength of the optical signal processed by each single wavelength filter is different;
the coupling of the optical signals sent by each single-fiber bidirectional optical module into one path of coupled optical signals by the wave combining and dividing device comprises the following steps:
the wavelength division multiplexing module receives the optical signals sent by the corresponding single-fiber bidirectional optical module and sends the optical signals to the corresponding single-wavelength filter;
the single wavelength filter receives the optical signals sent by the corresponding wavelength division multiplexing module and outputs the optical signals to the adjacent single wavelength filter or to the sending interface of the wave combining and dividing device;
the wave combining and dividing device decouples the received coupled optical signals into a plurality of paths of optical signals and sends the optical signals to the corresponding single-fiber bidirectional mode, and the wave combining and dividing device comprises:
the single wavelength filter filters the coupled optical signals received by the adjacent single wavelength filter or the receiving interface of the wave combining and dividing device to obtain optical signals with corresponding wavelengths, and inputs the optical signals into the corresponding wave division multiplexing module;
the wavelength division multiplexing module receives two optical signals with different wavelengths input by the corresponding single-wavelength filter and sends the optical signals to the corresponding single-fiber bidirectional optical module.
6. The light transmission method according to claim 5, wherein,
the single-fiber bidirectional optical module comprises: a transmitter, a receiver and a wavelength division multiplexing module; the transmitter and the receiver are respectively connected with the wavelength division multiplexing module; the wavelength division multiplexing module is connected with the wave combining and dividing device through a single optical fiber; the wavelength of the optical signals processed by the transmitter and the receiver are different;
each single-fiber bidirectional optical module transmits an optical signal to the wave-combining and wave-dividing device through a single optical fiber connected with the wave-combining and wave-dividing device, and the wave-combining and wave-dividing device comprises:
the transmitter receives an electric signal, converts the electric signal into an optical signal and sends the optical signal to the wavelength division multiplexing module;
the wavelength division multiplexing module receives the optical signals sent by the transmitter and sends the optical signals to the wave combining and dividing device through a single optical fiber;
each single-fiber bidirectional optical module receives an optical signal sent by the wave-combining and wave-dividing device through a single optical fiber connected with the wave-combining and wave-dividing device, and the optical signal comprises:
the wavelength division multiplexing module receives the optical signals sent by the multiplexer/demultiplexer through the single optical fiber and sends the optical signals to the receiver;
the receiver receives the optical signal sent by the wavelength division multiplexing module, and converts the optical signal into an electrical signal to be sent out.
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| CN114553313B (en) * | 2021-12-31 | 2023-11-17 | 华为技术有限公司 | Optical signal transmission device and optical transmission system |
| CN114401046B (en) * | 2022-01-26 | 2023-12-05 | 武汉光迅科技股份有限公司 | Optical signal processing system and optical signal processing method |
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