CN114124222A - Optical processing unit, optical transmission system and optical transmission method - Google Patents
Optical processing unit, optical transmission system and optical transmission method Download PDFInfo
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- CN114124222A CN114124222A CN202010879689.5A CN202010879689A CN114124222A CN 114124222 A CN114124222 A CN 114124222A CN 202010879689 A CN202010879689 A CN 202010879689A CN 114124222 A CN114124222 A CN 114124222A
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Abstract
The invention discloses an optical processing unit, an optical transmission system and an optical transmission method. The optical processing unit comprises an optical splitting component and a plurality of first wavelength multiplexing and splitting components, wherein the first wavelength multiplexing and splitting components are used for multiplexing or splitting a first optical signal in a CWDM mode and a second optical signal in a DWDM mode, namely, the first wavelength multiplexing and splitting components are used for transmitting the optical signals in a mode of mixing the CWDM and the DWDM, so that single-fiber bidirectional transmission can be realized. Moreover, the optical fiber resources can be saved and the cost can be reduced by realizing the single optical fiber bidirectional transmission.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an optical processing unit, an optical transmission system, and an optical transmission method.
Background
The fifth generation mobile communication (5G) technology is about to advance into the commercialization process, and its new service characteristics and higher index requirements all present new challenges to access network architecture and each layer of technical solutions. As shown in fig. 1, in the 5G fronthaul, networking between an AAU (active antenna Unit) and a DU (Distribution Unit) is implemented by CWDM (Coarse Wavelength Division Multiplexing) dual-fiber bi-direction, and optical modules on the AAU side can only be distributed in one area (base station) under this networking architecture, which is low in flexibility.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention provides an optical processing unit, an optical transmission system and an optical transmission method, which can improve the flexibility of optical module distribution.
In a first aspect, an embodiment of the present invention provides an optical processing unit, including:
the optical splitting module is used for splitting a single-path optical signal into multiple-path optical signals according to a preset proportion or combining the multiple-path optical signals into a single-path optical signal, wherein each path of optical signal in the multiple-path optical signals comprises a first optical signal in a Coarse Wavelength Division Multiplexing (CWDM) mode and a second optical signal in a Dense Wavelength Division Multiplexing (DWDM) mode;
the first wavelength multiplexing and wavelength division components are used for multiplexing or dividing the first optical signals and the second optical signals, the first wavelength multiplexing and wavelength division components are respectively connected with the optical division components, and each first wavelength multiplexing and wavelength division component is connected with a plurality of first optical modules.
In a second aspect, an embodiment of the present invention further provides an optical transmission system:
comprising the light processing unit of the first aspect and a light distribution unit, wherein the light distribution unit comprises:
and the second wavelength multiplexing and wavelength splitting component is used for multiplexing or splitting the first optical signal and the second optical signal, is connected with a plurality of second optical modules, and is connected with the optical splitting component through a transmission optical fiber.
In a third aspect, an embodiment of the present invention further provides an optical transmission method, including:
dividing a single optical signal into multiple optical signals according to a preset proportion, wherein each optical signal in the multiple optical signals comprises a first optical signal in a CWDM mode and a second optical signal in a DWDM mode;
performing wavelength division on each optical signal in the multiple optical signals to obtain the first optical signal and/or the second optical signal;
transmitting the first optical signal and/or the second optical signal.
In a fourth aspect, an embodiment of the present invention further provides an optical transmission method, including:
multiplexing a first optical signal and/or a second optical signal in each optical signal of a plurality of paths of optical signals, wherein the first optical signal is in a CWDM mode, and the second optical signal is in a DWDM mode;
combining the multiple optical signals into a single optical signal;
and transmitting the single optical signal.
The embodiment of the invention comprises the following steps: the optical fiber coupling device comprises an optical splitting component and a plurality of first wavelength multiplexing and splitting components, wherein the first wavelength multiplexing and splitting components are used for multiplexing or splitting a first optical signal in a CWDM mode and a second optical signal in a DWDM mode, namely, the first optical signal and the second optical signal are transmitted in a mixed mode of the CWDM and the DWDM, so that single-fiber bidirectional transmission can be realized. Moreover, the optical fiber resources can be saved and the cost can be reduced by realizing the single optical fiber bidirectional transmission.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a prior art architecture diagram of a CWDM optical transmission system;
FIG. 2 is an architectural diagram of a light delivery system provided by an embodiment of the present invention;
FIG. 3 is a block diagram of an optical transmission system according to an example embodiment of the present invention;
FIG. 4 is a graph of optical signal wavelength distribution in a first example provided by embodiments of the present invention;
FIG. 5 is a block diagram of an optical transmission system according to a second embodiment of the present invention;
fig. 6 is a graph of the wavelength distribution of an optical signal in a third example provided by the embodiment of the present invention;
FIG. 7 is an architectural diagram of an optical delivery system in a third example provided by embodiments of the present invention;
fig. 8 is a flow chart of a method of optical transmission provided by an embodiment of the invention;
fig. 9 is a flowchart of a light transmission method according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be understood that in the description of the embodiments of the present invention, a plurality (or a plurality) means two or more, more than, less than, more than, etc. are understood as excluding the number, and more than, less than, etc. are understood as including the number. If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.
At present, in the existing CWDM transmission mode, when a C wave band (1530nm-1565nm) and an L wave band (1565nm-1625nm) are adopted for baud rate of 25Gb and above, the problem of large dispersion exists, the medium/long distance transmission is difficult to carry out, and the cost is relatively high. Therefore, the embodiment of the invention adopts the O wave band for transmission, and the wavelength range is 1260nm to 1360nm, thereby avoiding the problem of large dispersion and reducing the cost.
On the basis of the CWDM optical transmission system architecture diagram shown in fig. 1, if a single channel realizes 25Gb transmission, then four channels can realize 100Gb transmission, however, in the O band, there are only 5 sets of coarse waves (20nm interval) in total for uplink and downlink wavelengths, and the transmit and receive need to be paired, and in the case of one transmission light, only two-channel transmission can be realized. Based on this, in the embodiment of the present invention, the optical signal is transmitted in a mixed manner of CWDM and DWDM (Dense Wavelength Division Multiplexing), so that the optical signal is transmitted on the basis of one transmission fiber, thereby effectively saving fiber resources and reducing cost. In addition, compared with the scheme of only using DWDM mode transmission, the power consumption can be effectively reduced, and the temperature control requirement can be reduced.
Referring to fig. 2, for an architecture diagram of an optical transmission system provided in an embodiment of the present invention, exemplarily, an optical processing unit is an AAU side in a 5G network, an optical distribution unit is a DU side in the 5G network, the optical processing unit includes an optical splitting component 201 for splitting a single optical signal into multiple optical signals according to a preset ratio or combining the multiple optical signals into a single optical signal, and a plurality of first wavelength multiplexing and demultiplexing components 202, the plurality of first wavelength multiplexing and demultiplexing components 202 are respectively connected to the optical splitting component 201, and each first wavelength multiplexing and demultiplexing component 202 is connected to a plurality of first optical modules 203; the light distribution unit includes a second wavelength division multiplexing component 204, the second wavelength division multiplexing component 204 is connected with a plurality of second optical modules 205, the second wavelength division multiplexing component 204 is connected with the light splitting component 201 through transmission optical fibers, wherein the number of the transmission optical fibers is one, and the first optical signals in the CWDM mode and the second optical signals in the DWDM mode are transmitted simultaneously.
The first multiplexer/demultiplexer component 202 is configured to multiplex or demultiplex the first optical signal and the second optical signal. Similarly, the second multiplexer/demultiplexer component 204 is used for multiplexing or demultiplexing the first optical signal and the second optical signal. By arranging the optical splitting assembly 201, a single optical signal can be split into multiple optical signals according to a preset proportion or the multiple optical signals can be combined into a single optical signal, so that the coverage area of the trunk optical fiber can be enlarged, the first optical modules 203 can be distributed in different areas, and the distribution flexibility of the first optical modules 203 is improved.
It should be added that the optical processing unit in the embodiment of the present invention includes an optical splitting component 201 and a first wavelength division multiplexing component 202, where the first wavelength division multiplexing component 202 is connected to a plurality of first optical modules 203, and does not represent that the optical splitting component 201, the first wavelength division multiplexing component 202, and the first optical modules 203 are physically located in the same device, and in practical applications, the optical splitting component 201, the first wavelength division multiplexing component 202, and the first optical modules 203 may be integrated in the same device, or at least one of them may be located in different devices as a discrete component, which is not limited in the embodiment of the present invention. The same applies to the light distribution unit, which is not described in detail herein.
In an embodiment, the light splitting component 201 may adopt an even splitter or a non-even splitter, and the preset ratio of light splitting may be 1:2, 1:3, and the like, which may be selected according to actual needs, and the embodiment of the present invention is not limited.
In an embodiment, the first wavelength division multiplexing component 202 includes a first wavelength division multiplexing component 2021, a first coarse wavelength division multiplexing demultiplexer 2022, and a first dense wavelength division multiplexing demultiplexer 2023, the first coarse wavelength division multiplexing demultiplexer 2022 and the first dense wavelength division multiplexing demultiplexer 2023 are respectively connected to the first wavelength division multiplexing component 2021, and the first coarse wavelength division multiplexing demultiplexer 2022 and the first dense wavelength division multiplexing demultiplexer 2023 are respectively connected to a plurality of first optical modules 203. Because the optical path is reversible, the first wavelength multiplexing/demultiplexing module 2021 may demultiplex each optical signal of the optical demultiplexing module 201 to obtain a first optical signal and a second optical signal, or multiplex the first optical signal and the second optical signal; the first coarse wavelength division multiplexing demultiplexer 2022 may multiplex or demultiplex the first optical signal to implement wavelength combination or separation of the first optical signal, and the first dense wavelength division multiplexing demultiplexer 2023 may multiplex or demultiplex the second optical signal to implement wavelength combination or separation of the second optical signal.
In an embodiment, the second wavelength division multiplexing component 204 includes a second wavelength division multiplexing component 2041, a second coarse wavelength division multiplexing demultiplexer 2042, and a second dense wavelength division multiplexing demultiplexer 2043, the second coarse wavelength division multiplexing demultiplexer 2042 and the second dense wavelength division multiplexing demultiplexer 2043 are respectively connected to the second wavelength division multiplexing component 2041, and the second coarse wavelength division multiplexing demultiplexer 2042 and the second dense wavelength division multiplexing demultiplexer 2043 are respectively connected to a plurality of second optical modules 205. The second multiplexer/demultiplexer 204 is similar to the first multiplexer/demultiplexer 202 in structure and principle, and is not described herein again.
It should be added that the first wavelength division multiplexing component 202 in the embodiment of the present invention includes the first wavelength division multiplexing component 2021, the first coarse wavelength division multiplexing demultiplexer 2022, and the first dense wavelength division multiplexing demultiplexer 2023, and does not represent that the first wavelength division multiplexing component 2021, the first coarse wavelength division multiplexing demultiplexer 2022, and the first dense wavelength division multiplexing demultiplexer 2023 are physically located in the same device, and in practical applications, the optical splitting component 201, the first wavelength division multiplexing component 202, and the first optical module 203 may be integrated in the same device, or at least one of them may be located in different devices as a discrete component, which is not limited in the embodiment of the present invention. The same applies to the second multiplexer/demultiplexer 204, and will not be described herein again.
In an embodiment, the wavelengths of the first optical signals received and transmitted by the first optical modules 203 under different first wavelength division multiplexing assemblies 202 are different, and the wavelengths of the second optical signals received and transmitted by the first optical modules 203 under different first wavelength division multiplexing assemblies 202 are different. For example, the wavelength of the first optical signal has λD1、λD2、λD3And λD4When one of the first multiplexer/demultiplexer elements 202 uses the wavelength λD1And λD2Then the other first multiplexer/demultiplexer component 202 does not use the wavelength λD1And λD2Using only the wavelength λD3And λD4. Therefore, on one hand, the interference phenomenon between different first wavelength multiplexing and demultiplexing components 202 can be avoided, and the working stability is improved; on the other hand, the wavelength that is not used by one of the first wavelength/division multiplexing components 202 may be used in the other first wavelength/division multiplexing component 202, that is, the wavelength that is not used in one area may be used in another area, which improves the utilization rate of the wavelength and increases the scalability. It is understood that the wavelength distribution principle of the second optical signal is similar to that of the first optical signal, and is not described in detail herein. The wavelength distribution principle of the first optical signal and the second optical signal under the second multiplexer/demultiplexer 204 is similar to that of the first multiplexer/demultiplexer 202, and is not described herein again.
In an embodiment, at the AAU side, the uplink transmission channel may use the wavelength of the first optical signal, and the downlink reception channel may use the wavelength of the second optical signal, that is, the wavelength of the first optical signal only includes the uplink wavelength, and the wavelength of the second optical signal only includes the downlink wavelength; of course, the wavelengths of the uplink and downlink may be switched, i.e. the wavelength of the first optical signal only includes the downlink wavelength and the wavelength of the second optical signal only includes the uplink wavelength.
In an embodiment, the wavelength of the first optical signal may also include an upstream wavelength and a downstream wavelength, and similarly, the wavelength of the second optical signal also includes an upstream wavelength and a downstream wavelength. The method has the advantages that the power consumption of the CWDM mode and the DWDM mode can be shared equally, so that the whole power consumption distribution of the network architecture is more reasonable, and the networking is more flexible.
The principle of the optical transmission system of the embodiment of the present invention is explained below in several practical examples.
Example one
Referring to fig. 3, when the AAU side transmits, CWDM optical signals (each having a wavelength λ) transmitted by the optical module 1 and the optical module 2C1And λC2) Demultiplexing by coarse wavelength division multiplexingMultiplexing by using a device C1, and multiplexing to an optical splitter by using a wavelength multiplexing and splitting device M1; CWDM optical signals (each having a wavelength λ) emitted from the optical modules 3 and 4C3And λC4) Multiplexing is carried out through a coarse wavelength division multiplexing demultiplexer C2, then wave multiplexing is carried out on the optical splitter through a wave multiplexing wave separator M2, and the optical splitter combines CWDM optical signals of a wave multiplexing wave separator M1 and a wave multiplexing wave separator M2 and sends the combined CWDM optical signals to a transmission optical fiber.
When the DU side receives the signal, the wavelength is separated from the transmission optical fiber by the wave-combining wave-splitting filter M3C1、λC2、λC3And λC4The CWDM optical signal is demultiplexed by the coarse wavelength division multiplexer C3, and sent to the corresponding optical module 5, optical module 6, optical module 7, and optical module 8.
The flow directions of the DWDM wavelength optical signals are similar, and when the DU side transmits, the DWDM optical signals (each having a wavelength λ) emitted by the optical modules 5, 6, 7 and 8 are transmittedD1、λD2、λD3And λD4) The optical fiber is multiplexed by a dense wavelength division multiplexer demultiplexer D3 and then is multiplexed by a wavelength multiplexing/demultiplexing device M3 to a transmission optical fiber.
During receiving, AAU side first splits two optical signals via splitter, and wave-combining and wave-splitting devices M1 and M2 separate DWDM wavelength lambdaD1、λD2、λD3And λD4The DWDM optical signal is demultiplexed by a dense wavelength division multiplexing demultiplexer D1 and a dense wavelength division multiplexing demultiplexer D2 respectively, and the wavelength separated by the dense wavelength division multiplexing demultiplexer D1 is lambdaD1、λD2The DWDM optical signals are respectively received by the optical module 1 and the optical module 2, and the wavelength separated by the dense wavelength division multiplexing demultiplexer D2 is lambdaD3、λD4The DWDM optical signals of (1) are received by the optical module 3 and the optical module 4, respectively.
Referring to fig. 4, the uplink optical signal is a CWDM optical signal having a center wavelength of λC1＝1270nm、λC2＝1290nm、λC31310nm and λC41330nm, the downlink optical signal is DWDM optical signal with center wavelength of λD1＝1344nm、λD2＝1348nm、λD31352nm and λD4＝1356nm。
The lasers of the optical module 1, the optical module 2, the optical module 3 and the optical module 4 can adopt DFB lasers so as to reduce cost and power consumption; the lasers of the optical modules 5, 6, 7 and 8 can adopt WML lasers, and the line width performance of the lasers is improved on the basis of not increasing excessive power consumption.
In addition, in order to ensure normal transmission even in a long distance and reduce the dispersion effect of the transmission fiber, the number of wavelengths of the CWDM optical signal may be reduced to 3, and correspondingly, the number of wavelengths of the DWDM optical signal is also reduced to 3, for example, the wavelength range of the CWDM optical signal is 1260nm to 1310nm, and the wavelength range of the DWDM optical signal is 1310nm to 1340 nm.
In this way, the optical module 1 and the optical module 2 can operate in one area, and the optical module 3 and the optical module 4 can operate in the other area. It can be understood that the wavelength distributions of the optical modules 1, 2, 3 and 4 can be adjusted according to actual conditions, for example, the optical modules 1, 2 and 3 operate in the same area, and the optical module 4 operates in another area.
Example two
Referring to fig. 5, the networking architecture is similar to that of the first example, and the difference is that the optical module 5, the optical module 6, the optical module 7, and the optical module 8 on the DU side are combined into one optical module, and the wavelength multiplexer/demultiplexer M3, the coarse wavelength division multiplexer/demultiplexer C3, and the dense wavelength division multiplexer/demultiplexer D3 are all embedded inside the optical module, so that the optical module can be directly connected to a transmission optical fiber, the number of hop fibers is saved, and the maintenance difficulty is reduced.
And at the AAU side, the device is in a discrete form, so that flexible installation of devices in different areas is facilitated.
Example III
Referring to fig. 6 to 7, the networking architecture in this example is the same as that in the first example, except that the wavelengths are divided, in the first example, the upstream wavelengths are all the wavelengths of the CWDM optical signal, and the downstream wavelengths are all the wavelengths of the DWDM optical signal, and in the present example, the upstream wavelengths are the wavelengths λ of the CWDM optical signalC3And λC4Also for DWDM optical signalsWavelength lambdaD1And λD2(ii) a Wavelength lambda of existing CWDM optical signal with downlink wavelengthC1And λC2Also having the wavelength λ of DWDM optical signalsD3And λD4。
Because the optical path is reversible, the wavelength distribution mode does not need to change the networking architecture, and only needs the matching of the receiving and transmitting ports of the optical module. The wavelength distribution mode has the advantages that the effect of power consumption sharing can be achieved due to the fact that power consumption of the CWDM mode and the DWDM mode are different, power consumption of the DU side can be shared when the AAU side is not very sensitive to the power consumption, and networking flexibility can be improved.
Referring to fig. 8, an embodiment of the present invention further provides a light transmission method, which is exemplarily applied to the light transmission system in the foregoing embodiment, and specifically includes, but is not limited to, the following steps 801 to 803:
step 801: dividing the single optical signal into multiple optical signals according to a preset proportion;
step 802: performing wave division on each path of optical signal to obtain a first optical signal and/or a second optical signal;
step 803: the first optical signal and/or the second optical signal is transmitted.
In step 801, each optical signal in the multiple optical signals includes a first optical signal in a coarse wavelength division multiplexing CWDM scheme and a second optical signal in a dense wavelength division multiplexing DWDM scheme;
in step 802, each optical signal is demultiplexed to obtain a first optical signal and/or a second optical signal, which may be the first optical signal obtained by demultiplexing each optical signal, for example, in the networking architecture in the first example, the downlink optical signal is a CWDM signal; for example, in the first example, the processing method may be a processing method when the downlink optical signal is a DWDM signal in the networking architecture; for example, in the networking architecture in the third example, the downlink optical signal may include both the CWDM signal and the DWDM signal.
The optical signals are transmitted in a mixed mode of CWDM and DWDM, single-optical-fiber bidirectional transmission can be achieved, on the basis, the single-path optical signals are divided into multiple paths of optical signals according to a preset proportion or the multiple paths of optical signals are combined into the single-path optical signals, so that the coverage range of the trunk optical fiber can be enlarged, the first optical modules can be distributed in different areas, and the distribution flexibility of the first optical modules is improved. Moreover, the optical fiber resources can be saved and the cost can be reduced by realizing the single optical fiber bidirectional transmission.
In an embodiment, in step 802, the wave division is performed on each optical signal to obtain the first optical signal and/or the second optical signal, and specifically, the wave division is performed on each optical signal, and then the demultiplexing is performed to obtain a plurality of first optical signals and/or a plurality of second optical signals, so as to implement multi-channel transmission. The above embodiments have been described in detail for implementing the specific demultiplexing and demultiplexing, and are not described herein again.
Referring to fig. 9, an embodiment of the present invention further provides a light transmission method, which is exemplarily applied to the light transmission system in the foregoing embodiment, and specifically includes, but is not limited to, the following steps 901 to 903:
step 901: multiplexing a first optical signal and/or a second optical signal in each optical signal of the plurality of optical signals;
step 902: combining the multiple optical signals into a single optical signal;
step 903: transmitting a single optical signal.
In step 901, the first optical signal is in a CWDM mode, and the second optical signal is in a DWDM mode;
the above steps 901 to 903 are the reverse processes of steps 801 to 803, and the principles thereof are similar, so that the first optical modules can be distributed in different areas, and the flexibility of the distribution of the first optical modules is improved. Moreover, the optical fiber resources can be saved and the cost can be reduced by realizing the single optical fiber bidirectional transmission.
In an embodiment, in the step 901, the first optical signal and/or the second optical signal in each optical signal of the multiple optical signals are multiplexed, specifically, a plurality of first optical signals and/or a plurality of second optical signals in each optical signal of the multiple optical signals are multiplexed and then multiplexed, so as to implement multi-channel transmission. The above embodiments have been described for the specific implementation of multiplexing and multiplexing, and are not described herein again.
It should also be appreciated that the various implementations provided by the embodiments of the present invention can be combined arbitrarily to achieve different technical effects.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (12)
1. A light processing unit, comprising:
the optical splitting module is used for splitting a single-path optical signal into multiple-path optical signals according to a preset proportion or combining the multiple-path optical signals into a single-path optical signal, wherein each path of optical signal in the multiple-path optical signals comprises a first optical signal in a Coarse Wavelength Division Multiplexing (CWDM) mode and a second optical signal in a Dense Wavelength Division Multiplexing (DWDM) mode;
the first wavelength multiplexing and wavelength division components are used for multiplexing or dividing the first optical signals and the second optical signals, the first wavelength multiplexing and wavelength division components are respectively connected with the optical division components, and each first wavelength multiplexing and wavelength division component is connected with a plurality of first optical modules.
2. The light processing unit of claim 1, wherein:
the wavelengths of the first optical signals received and transmitted by the first optical modules under different first wavelength division multiplexing components are different, and the wavelengths of the second optical signals received and transmitted by the first optical modules under different first wavelength division multiplexing components are different.
3. The light processing unit of claim 1, wherein:
the first wavelength multiplexing and demultiplexing component comprises a first wavelength multiplexing and demultiplexing device, a first coarse wavelength multiplexing and demultiplexing device and a first dense wavelength multiplexing and demultiplexing device, the first coarse wavelength multiplexing and demultiplexing device and the first dense wavelength multiplexing and demultiplexing device are respectively connected with the first wavelength multiplexing and demultiplexing device, and the first coarse wavelength multiplexing and demultiplexing device and the first dense wavelength multiplexing and demultiplexing device are respectively connected with the plurality of first optical modules.
4. The light processing unit of claim 1, wherein:
the wavelength interval of the first optical signal is 20nm, and the wavelength interval of the second optical signal is 4 nm.
5. The light processing unit of claim 1, wherein:
the wavelength range of the first optical signal is 1260nm to 1340nm, and the wavelength range of the second optical signal is 1340nm to 1360 nm;
alternatively, the first optical signal has a wavelength ranging from 1260nm to 1310nm, and the second optical signal has a wavelength ranging from 1310nm to 1340 nm.
6. The light processing unit of claim 1, wherein:
the wavelength of the first optical signal only comprises an uplink wavelength, and the wavelength of the second optical signal only comprises a downlink wavelength;
or, the wavelength of the first optical signal only includes a downlink wavelength, and the wavelength of the second optical signal only includes an uplink wavelength;
or, the wavelength of the first optical signal includes an uplink wavelength and a downlink wavelength, and the wavelength of the second optical signal also includes an uplink wavelength and a downlink wavelength.
7. An optical transmission system, characterized by:
comprising a light processing unit according to any one of claims 1 to 6, and a light distribution unit, wherein the light distribution unit comprises:
and the second wavelength multiplexing and wavelength splitting component is used for multiplexing or splitting the first optical signal and the second optical signal, is connected with a plurality of second optical modules, and is connected with the optical splitting component through a transmission optical fiber.
8. The optical transmission system of claim 7, wherein:
the second wavelength division multiplexing component comprises a second wavelength division multiplexing device, a second coarse wavelength division multiplexing demultiplexer and a second dense wavelength division multiplexing demultiplexer, the second coarse wavelength division multiplexing demultiplexer and the second dense wavelength division multiplexing demultiplexer are respectively connected with the second wavelength division multiplexing demultiplexer, and the second coarse wavelength division multiplexing demultiplexer and the second dense wavelength division multiplexing demultiplexer are respectively connected with the plurality of second optical modules.
9. An optical transmission method comprising:
dividing a single optical signal into multiple optical signals according to a preset proportion, wherein each optical signal in the multiple optical signals comprises a first optical signal in a CWDM mode and a second optical signal in a DWDM mode;
performing wavelength division on each optical signal in the multiple optical signals to obtain the first optical signal and/or the second optical signal;
transmitting the first optical signal and/or the second optical signal.
10. The optical transmission method according to claim 9, wherein the wavelength division of each optical signal to obtain the first optical signal and/or the second optical signal specifically includes:
and demultiplexing the optical signals of each path after the optical signals of each path are subjected to wavelength division to obtain a plurality of first optical signals and/or a plurality of second optical signals.
11. An optical transmission method comprising:
multiplexing a first optical signal and/or a second optical signal in each optical signal of a plurality of paths of optical signals, wherein the first optical signal is in a CWDM mode, and the second optical signal is in a DWDM mode;
combining the multiple optical signals into a single optical signal;
and transmitting the single optical signal.
12. The optical transmission method according to claim 11, wherein the multiplexing the first optical signal and/or the second optical signal in each of the plurality of optical signals specifically includes:
multiplexing and multiplexing a plurality of first optical signals and/or a plurality of second optical signals in each optical signal of the multi-path optical signals.
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| CN117768056A (en) * | 2023-12-18 | 2024-03-26 | 耀芯电子(浙江)有限公司 | Optical fiber communication method and device based on wavelength division multiplexing |
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