CN211959226U - Low-cost 5G forward WDM module - Google Patents
Low-cost 5G forward WDM module Download PDFInfo
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- CN211959226U CN211959226U CN202020960158.4U CN202020960158U CN211959226U CN 211959226 U CN211959226 U CN 211959226U CN 202020960158 U CN202020960158 U CN 202020960158U CN 211959226 U CN211959226 U CN 211959226U
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Abstract
The utility model discloses a low-cost 5G fronthaul WDM module, include: the first wavelength division multiplexing/demultiplexing module is provided with a first multiplexing com end used for accessing the uplink optical signals and a first demultiplexing com end used for outputting the downlink optical signals; the optical signal input by the port a is output from the port b, the optical signal input by the port b is output from the port c, the port a of the first optical circulator is connected with the first multiplexing com end, the port c is connected with the first demultiplexing com end, and the port b is connected with the port of the second optical circulator; the second wavelength division multiplexing/demultiplexing module is provided with a second multiplexing com end used for accessing the uplink optical signals and a second demultiplexing com end used for outputting the downlink optical signals, the second multiplexing com end is connected with a port a of the second optical circulator, and the second demultiplexing com end is connected with a port c of the second optical circulator.
Description
Technical Field
The utility model belongs to the technical field of the optical communication technique and specifically relates to low-cost 5G fronthaul WDM module.
Background
The 5G forward transmission bearing scheme mainly includes an optical fiber direct drive scheme and a wavelength division equipment bearing scheme, where the optical fiber direct drive scheme is mainly used in a scenario where optical fiber resources are sufficient, and the wavelength division bearing scheme is required to be adopted for a scenario where optical fiber resources are in shortage. The passive WDM scheme has been widely used in scenarios where optical fiber saving is needed, such as 4G fronthaul and other scenarios where distribution cables and trunk cables are insufficient. The passive WDM scheme is classified into a coarse wavelength division and a dense wavelength division according to a wavelength interval. The cost of realizing a single optical path by the dense wavelength division system is several times that of the coarse wavelength division system, and the wavelength distribution complexity of the dense wavelength division scheme is greatly increased when the dense wavelength division system is used for forward transmission, so the coarse wavelength division scheme is adopted for 5G forward transmission. How to reduce the space occupation and the number of devices in the module for the 5G forward coarse wavelength division scheme becomes a subject of long-term research and study by practitioners in the field.
Disclosure of Invention
To the state of the art, the utility model aims to provide a compact structure, with low costs and reliable performance's low-cost 5G fronthaul WDM module.
In order to realize the technical purpose, the utility model adopts the technical scheme that:
a low cost 5G fronthaul WDM module comprising:
the first wavelength division multiplexing/demultiplexing module is used for multiplexing the uplink signals and demultiplexing the downlink signals and is provided with a first multiplexing com end used for accessing the uplink optical signals and a first demultiplexing com end used for outputting the downlink optical signals;
a first optical circulator having a first port a to which an optical signal input from the first port a is output and a first port b to which an optical signal input from the first port b is output, the first port a being connected to a first multiplexing com port and the first port c being connected to a first demultiplexing com port;
the second optical circulator is provided with a second port a, a second port b and a second port c, wherein the optical signal input by the second port a is output from the second port b, the optical signal input by the second port b is output from the second port c, and the second port b is in bidirectional transmission connection with the first port b of the first optical circulator;
the second wavelength division multiplexing/demultiplexing module is used for multiplexing uplink signals and demultiplexing downlink signals, and is provided with a second multiplexing com end for accessing the uplink optical signals and a second demultiplexing com end for outputting the downlink optical signals, wherein the second multiplexing com end is connected with a second port a of a second optical circulator, and the second demultiplexing com end is connected with a second port c of the second optical circulator.
As a possible implementation manner, further, the first wavelength division multiplexing/demultiplexing module and the second wavelength division multiplexing/demultiplexing module are each formed by cascading n wavelength division multiplexers, and the operating wavelength corresponding to the n wavelength division multiplexers is λ1、λ2、λ3……λn。
As a preferred alternative, it is preferred that the corresponding operating wavelength is λnThe wavelength division multiplexer is a six-port wavelength division multiplexer, wherein three ports of the wavelength division multiplexer form a path and are used for wavelength division multiplexing, and the other three ports of the wavelength division multiplexer form a path and are used for wavelength division demultiplexing.
As a preferred optional embodiment, preferably, the wavelength division multiplexer includes four optical fiber collimators, a WDM diaphragm, and two optical fiber collimators, which are sequentially arranged, wherein two optical fibers of the four optical fiber collimators and one optical fiber of the two optical fiber collimators form a path and are used for wavelength division multiplexing, the other two optical fibers of the four optical fiber collimators and the other optical fiber of the two optical fiber collimators form a path and are used for wavelength division demultiplexing, and in addition, the WDM diaphragm is used for transmitting an optical signal with a working wavelength consistent with the WDM diaphragm and reflecting an optical signal with a working wavelength inconsistent with the WDM diaphragm, so that the WDM diaphragm is matched with the four optical fiber collimators and the two optical fiber collimators to realize the wavelength division demultiplexing effect by inputting the optical signal from different directions.
Adopt foretell technical scheme, compared with the prior art, the utility model, its beneficial effect who has is: the scheme realizes the functions of wavelength division multiplexing and wavelength division demultiplexing through the scheme of wavelength division multiplexer cascade, and the specific scheme includes: the 2-in-1 six-port wavelength division multiplexer is respectively used for wavelength division multiplexing and wavelength division demultiplexing, half of the number of devices is saved, and meanwhile, the optical fiber resources are further saved by utilizing the characteristic of single-fiber bidirectional transmission of the circulator, so that the scheme not only has a more compact structure, but also has the advantage of obviously reducing the cost, and is suitable for market popularization.
Drawings
The scheme of the invention is further explained by combining the attached drawings and the detailed embodiment:
FIG. 1 is a schematic structural diagram of the embodiment of the present invention;
fig. 2 is a schematic structural diagram of the wavelength division multiplexer according to the present invention.
Detailed Description
As shown in fig. 1 or fig. 2, the utility model discloses low-cost 5G fronthaul WDM module, it includes:
a first wavelength division multiplexing/demultiplexing module 1 for multiplexing of uplink signals and demultiplexing of downlink signals, having a first multiplexing com end for uplink optical signal access and a first demultiplexing com end for downlink optical signal output;
a first optical circulator 2 having a first port a 21, a first port b 22, and a first port c 23, wherein an optical signal input from the first port a 21 is output from the first port b 22, an optical signal input from the first port b 22 is output from the first port c 23, the first port a 21 is connected to a first multiplexing com port, and the first port c 23 is connected to a first demultiplexing com port;
a second optical circulator 3 having a second port a 31, a second port b 32, and a second port c 33, wherein the optical signal input from the second port a 31 is output from the second port b 32, the optical signal input from the second port b 32 is output from the second port c 33, and the second port b 32 is bidirectionally connected to the first port b 22 of the first optical circulator 2;
the second wavelength division multiplexing/demultiplexing module 4 is used for multiplexing the uplink signals and demultiplexing the downlink signals, and has a second multiplexing com end for accessing the uplink optical signals and a second demultiplexing com end for outputting the downlink optical signals, the second multiplexing com end is connected with the second port a 31 of the second optical circulator 3, and the second demultiplexing com end is connected with the second port c 33 of the second optical circulator.
As a possible implementation manner, further, the first wavelength division multiplexing/demultiplexing module 1 and the second wavelength division multiplexing/demultiplexing module 4 are respectively formed by cascading n wavelength division multiplexers, and the working wavelength corresponding to the n wavelength division multiplexers is λ1、λ2、λ3……λn(ii) a As a preferred alternative, it is preferred that the corresponding operating wavelength is λnThe wavelength division multiplexer is a six-port wavelength division multiplexer, wherein three ports of the wavelength division multiplexer form a path and are used for wavelength division multiplexing, and the other three ports of the wavelength division multiplexer form a path and are used for wavelength division demultiplexing.
In addition, referring to fig. 2 for emphasis, as a preferred alternative embodiment, it is preferable that the wavelength division multiplexer includes four optical fiber collimators 11, a WDM diaphragm 12, and a dual optical fiber collimator 13, which are sequentially arranged, wherein two optical fibers of the four optical fiber collimators and one optical fiber of the dual optical fiber collimator form a path and are used for wavelength division multiplexing, the other two optical fibers of the four optical fiber collimators and the other optical fiber of the dual optical fiber collimator form a path and are used for wavelength division demultiplexing, and the WDM diaphragm is used for transmitting an optical signal having a same operating wavelength as the optical signal and reflecting an optical signal having a different operating wavelength from the optical signal, so that the WDM diaphragm 12 is matched with the four optical fiber collimators 11 and the dual optical fiber collimator 13 to realize that the optical signal is input from different directions to achieve a wavelength division multiplexing effect.
Based on fig. 1, and with reference to the specific optical path shown in fig. 2, the multiplexing com end and the demultiplexing com end of the first wavelength division multiplexing/demultiplexing module 1 and the second wavelength division multiplexing/demultiplexing module 4 are both one of four optical fibers of the four optical fiber collimator 11 located in the wavelength division multiplexer.
For wavelength division multiplexing, the wavelength of λ n input by the dual optical fiber collimator 13 is input to the multiplexing transmission end of the four optical fiber collimator 11 after passing through the WDM diaphragm 12, the wavelength of λ 1, λ 2 … … λ n-1 and λ n +1 … … are input to the multiplexing reflection end of the four optical fiber collimator 11, and the wavelength of λ n is input to the multiplexing transmission end of the four optical fiber collimator 11 after being reflected by the WDM diaphragm 12, so that the composite wave of λ 1, λ 2 … … λ n-1, λ n and λ n +1 … … is realized.
For wavelength division demultiplexing, the transmission end of the four-fiber collimator 11 is input with λ 1, λ 2 … … λ n-1, λ n, λ n +1 … …, the input light is injected into the WDM film, wherein λ 1, λ 2 … … λ n-1, λ n +1 … … wavelengths are reflected to the reflection end of the four-fiber collimator 11, and the λ n wavelengths are transmitted to the dual-fiber collimator 13 for output after passing through the WDM film 12, thereby realizing demultiplexing.
The above is the embodiment of the present invention, and to the ordinary skilled in the art, according to the teaching of the present invention, the equal changes, modifications, replacements and variations of the claims should all belong to the scope of the present invention without departing from the principle and spirit of the present invention.
Claims (4)
1. The low-cost 5G fronthaul WDM module is characterized in that: it includes:
the first wavelength division multiplexing/demultiplexing module is used for multiplexing the uplink signals and demultiplexing the downlink signals and is provided with a first multiplexing com end used for accessing the uplink optical signals and a first demultiplexing com end used for outputting the downlink optical signals;
a first optical circulator having a first port a to which an optical signal input from the first port a is output and a first port b to which an optical signal input from the first port b is output, the first port a being connected to a first multiplexing com port and the first port c being connected to a first demultiplexing com port;
the second optical circulator is provided with a second port a, a second port b and a second port c, wherein the optical signal input by the second port a is output from the second port b, the optical signal input by the second port b is output from the second port c, and the second port b is in bidirectional transmission connection with the first port b of the first optical circulator;
the second wavelength division multiplexing/demultiplexing module is used for multiplexing uplink signals and demultiplexing downlink signals, and is provided with a second multiplexing com end for accessing the uplink optical signals and a second demultiplexing com end for outputting the downlink optical signals, wherein the second multiplexing com end is connected with a second port a of a second optical circulator, and the second demultiplexing com end is connected with a second port c of the second optical circulator.
2. A low-cost 5G fronthaul WDM module according to claim 1, wherein: the first wavelength division multiplexing/demultiplexing module and the second wavelength division multiplexing/demultiplexing module are respectively formed by cascading n wavelength division multiplexers, and the working wavelength corresponding to the n wavelength division multiplexers is lambda1、λ2、λ3……λn。
3. A low-cost 5G fronthaul WDM module according to claim 2, wherein: corresponding to an operating wavelength of λnThe wavelength division multiplexer is a six-port wavelength division multiplexer, wherein three ports of the wavelength division multiplexer form a path and are used for wavelength division multiplexing, and the other three ports of the wavelength division multiplexer form a path and are used for wavelength division demultiplexing.
4. A low-cost 5G forwarding WDM module according to claim 2 or 3, wherein: the wavelength division multiplexer comprises four optical fiber collimators, a WDM membrane and two optical fiber collimators which are sequentially arranged, wherein two optical fibers of the four optical fiber collimators and one optical fiber of the two optical fiber collimators form one path and are used for wavelength division multiplexing, and the other two optical fibers of the four optical fiber collimators and the other optical fiber of the two optical fiber collimators form one path and are used for wavelength division demultiplexing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020960158.4U CN211959226U (en) | 2020-05-29 | 2020-05-29 | Low-cost 5G forward WDM module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020960158.4U CN211959226U (en) | 2020-05-29 | 2020-05-29 | Low-cost 5G forward WDM module |
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| CN211959226U true CN211959226U (en) | 2020-11-17 |
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| CN202020960158.4U Active CN211959226U (en) | 2020-05-29 | 2020-05-29 | Low-cost 5G forward WDM module |
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Address after: 350100 floor 5, building 19, phase II, innovation park, No. 7, middle wulongjiang Avenue, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee after: Fujian Haichuang Photoelectric Technology Co.,Ltd. Address before: 350005, 27th floor, Pioneer Building, Haixi hi tech Industrial Park, high tech Zone, Fuzhou City, Fujian Province Patentee before: FUJIAN HAICHUANG PHOTOELECTRIC CO.,LTD. |
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