CN113238321A - Wavelength division multiplexer for 5G forward transmission - Google Patents
Wavelength division multiplexer for 5G forward transmission Download PDFInfo
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- CN113238321A CN113238321A CN202110539539.4A CN202110539539A CN113238321A CN 113238321 A CN113238321 A CN 113238321A CN 202110539539 A CN202110539539 A CN 202110539539A CN 113238321 A CN113238321 A CN 113238321A
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- Prior art keywords
- wavelength division
- division multiplexing
- optical fiber
- division multiplexer
- capillary tube
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a wavelength division multiplexer for 5G forward transmission, which comprises a packaging tube, wherein at least one group of wavelength division multiplexing units are sleeved in the packaging tube, each wavelength division multiplexing unit comprises a capillary tube for inserting at least one incident optical fiber and at least two emergent optical fibers at the same side, one end surface of the capillary tube is attached with a self-focusing lens for focusing divergent light in the incident optical fiber into a Gaussian beam, the other end surface of the self-focusing lens is attached with a wavelength division multiplexing membrane for reflecting one part of light beams in the Gaussian beam to a position corresponding to one emergent optical fiber and allowing the other part of light beams to pass through, and the other side of the wavelength division multiplexing membrane is attached with a total reflection membrane for reflecting the light beams passing through the wavelength division multiplexing membrane to a position corresponding to the other emergent optical fiber. Compared with the prior art, the wavelength division multiplexer has the advantages of simplifying the structure, reducing the production cost, improving the production efficiency, effectively reducing the volume of the conventional wavelength division multiplexer, playing a characteristic in more application scenes with small volume and being beneficial to the 5G communication infrastructure.
Description
Technical Field
The invention relates to the field of communication, in particular to a wavelength division multiplexer for 5G forward transmission.
Background
At present, China is accelerating to promote the 5G network construction progress, and the number of 5G base stations in the whole country is expected to exceed 110 ten thousand by the end of 2021 year; meanwhile, large-scale 5G construction consumes a large amount of forward-transmission optical fiber basic resources, and brings network construction cost and energy consumption pressure to operators; operators decide to adopt passive wavelength division schemes (WDM) by analyzing and investigating various technologies, construction periods, and cost-effectiveness aspects. By adopting the WDM scheme, the construction cost can be greatly saved, the construction period is shortened, the power transformation investment of the original machine room is reduced, and the operation cost is reduced.
The conventional Wavelength Division Multiplexer (WDM) employs a three-port production method, BOM, which is costly, and as shown in fig. 1, a total of 11 parts are required to form a completed WDM device. The conventional WDM assembly procedure is as follows: 1) assembling 102 optical fiber a +103 single-core capillary into a single-fiber light beam; 2) a single-fiber light beam and 101 small glass tubes a + 104C-lens are debugged to form a single-fiber collimator; 3) the 110 optical fiber b +111 optical fiber c +108 double-core capillary is assembled into a double-fiber light beam; 4) a double-fiber light beam, a 109 glass tube b, a 107 self-focusing lens and a 106 WDM membrane are assembled into a reflecting end component by debugging optical parameters; 5) and the reflection end component, the single-fiber collimator and the 105 large glass tube are assembled into a WDM device by debugging optical parameters. The traditional WDM has 2 times of light beam assembly, 3 times of optical parameter debugging, at least 5 assembly processes, complex assembly, low production efficiency, more required parts and high production cost.
Disclosure of Invention
Aiming at the problems, the invention provides the wavelength division multiplexer for 5G forward transmission, which simplifies the structure, improves the production efficiency, reduces the production cost and is beneficial to 5G communication infrastructure.
The technical scheme adopted by the invention is as follows:
a wavelength division multiplexer for 5G forward transmission comprises a packaging tube and is characterized in that at least one group of wavelength division multiplexing units are sleeved in the packaging tube, each wavelength division multiplexing unit comprises a capillary tube used for inserting at least one incident optical fiber and at least two emergent optical fibers at the same side, a self-focusing lens used for focusing divergent light in the incident optical fiber into a Gaussian beam is attached to one end face of each capillary tube, a wavelength division multiplexing membrane used for reflecting a part of light beams in the Gaussian beam to a position corresponding to one emergent optical fiber and allowing the other part of light beams to pass through is attached to the other end face of each self-focusing lens, and a total reflection membrane used for reflecting the light beams passing through the wavelength division multiplexing membrane to a position corresponding to the other emergent optical fiber is attached to the other side of the wavelength division multiplexing membrane.
Preferably, at least three ferrule holes for inserting optical fibers are formed in the capillary tube, and an inclined surface is formed at one end surface of the capillary tube.
More preferably, one end surface of the capillary tube forms an inclined surface having an included angle of 8 °.
Preferably, the capillary tube is further sleeved with an outer sleeve, the capillary tube penetrates through the outer sleeve to be in butt joint with the end face of the self-focusing lens, and the outer sleeve is inserted into one end of the packaging tube.
More preferably, the outer sleeve and the packaging tube are fixed by gluing.
Preferably, the two wavelength division multiplexing units are sleeved in the packaging tube and are respectively positioned in the two end parts of the packaging tube.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a wavelength division multiplexer for 5G forward transmission, which is characterized in that an incident optical fiber and an emergent optical fiber are arranged in a capillary in the same direction, and an optical signal transmitted by the incident optical fiber is reflected into the two emergent optical fibers by adopting a self-focusing lens, a wavelength division multiplexing membrane and a total reflection membrane, so that the structure is simplified, the working principle and the working index of the wavelength division multiplexer are not changed, the production cost of the wavelength division multiplexer is reduced, the production efficiency is improved, the volume of the conventional wavelength division multiplexer is effectively reduced, the characteristics can be played in more small-volume application scenes, and the 5G communication infrastructure is facilitated.
Drawings
Fig. 1 is a schematic diagram of a conventional wavelength division multiplexer;
fig. 2 is a schematic diagram of a wavelength division multiplexer for 5G forward transmission according to the present invention;
fig. 3 is a schematic diagram of a wavelength division multiplexing unit in the wavelength division multiplexer for 5G forward transmission according to the present invention;
FIG. 4 is a schematic diagram of a capillary in a wavelength division multiplexer for 5G forward transmission according to the present invention;
fig. 5 is a schematic diagram of a self-focusing lens and a wavelength division multiplexing chip in a wavelength division multiplexer for 5G forward transmission according to the present invention;
fig. 6 is a schematic optical path diagram of a wavelength division multiplexing chip and a total reflection diaphragm in the wavelength division multiplexer for 5G fronthaul provided by the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 2 to 6 show a preferred embodiment of a wavelength division multiplexer for 5G forward transmission according to the present invention. As shown in fig. 2 to 6, the wavelength division multiplexer for 5G forward transmission includes a packaging tube 10, at least one set of wavelength division multiplexing units 20 is sleeved in the packaging tube, each wavelength division multiplexing unit 20 includes a capillary 21 for inserting at least one incident optical fiber 101 and at least two emergent optical fibers 102 and 103 at the same side, a self-focusing lens 22 for focusing the divergent light in the incident optical fiber 101 into a gaussian light beam is attached to one end surface of the capillary, a wavelength division multiplexing diaphragm 23 for reflecting a part of the gaussian light beam to a corresponding emergent optical fiber 102 and passing another part of the gaussian light beam is attached to the other end surface of the self-focusing lens, a total reflection diaphragm 24 for reflecting the light beam passing through the wavelength division multiplexing diaphragm to a corresponding another emergent optical fiber 103 is attached to the other side of the wavelength division multiplexing diaphragm 23, so that the incident optical fiber and the emergent optical fiber are both located at the same side of the capillary 21, divergent light entering from an incident optical fiber is focused through a self-focusing lens 22 to form a Gaussian beam, one part of the Gaussian beam is reflected through a wavelength division multiplexing membrane 23 to form reflected light, the reflected light is reflected to correspond to one emergent optical fiber and enters the emergent optical fiber, the other part of the Gaussian beam passes through the wavelength division multiplexing membrane 23 and is totally reflected through a total reflection membrane 24 to form transmitted light, the transmitted light corresponds to the other emergent optical fiber and enters the other emergent optical fiber; the working principle and working index of the wavelength division multiplexer are not changed, the production cost of the wavelength division multiplexer can be effectively reduced, the production efficiency of the wavelength division multiplexer can be effectively improved, the size of the conventional wavelength division multiplexer is effectively reduced, and the wavelength division multiplexer can play a characteristic role in more application scenes with small size.
The optical fiber end face is a very fragile part, and in an optical communication device, the flatness and the smoothness of the optical fiber end face need to be ensured to meet the transmission requirement of high transmittance of an optical device. A capillary 21 is required to secure the fiber outside the fiber. At least three ferrule holes 211 for inserting optical fibers are formed in the capillary tube 21, the ferrule holes 211 are through holes, and an inclined surface 212 is formed at one end surface of the capillary tube. In a preferred embodiment, one end surface of the capillary tube is formed with an inclined surface having an angle of 8 °, and correspondingly, one end of the self-focusing lens 22 is formed with an inclined surface which is bonded to the inclined surface of the capillary tube. The capillary 21 is made of glass material, and the optical fiber is inserted into the core inserting hole 211 and fixed by glue.
When light transmission in the optical fiber passes through a component with an optical function (such as a WDM wavelength division multiplexing function), the state of a light beam coming out of the optical fiber is a divergent structure, which is not beneficial to transmission and coupling of an optical path; adopting a self-focusing lens to shape the divergent light into a Gaussian beam through a light path; when the light beam is transmitted in the air and meets different media in the receiving process, the transmission direction of the light beam can be changed due to the fact that the refractive indexes of the media are different, the refractive index distribution of the self-focusing lens material is gradually reduced along the radial direction, light transmitted along the axial direction can be continuously refracted, and therefore the emergent light rays can be smoothly and continuously converged into the optical fiber.
The capillary tube 21 is also sleeved with an outer sleeve 25, the capillary tube penetrates through the outer sleeve 25 to be in butt joint with the end face of the self-focusing lens 22, and the outer sleeve 25 is inserted into one end of the packaging tube 10. The outer sleeve 25 and the packaging tube 10 are bonded and fixed by glue.
As a better usage, two wavelength division multiplexing units 20 are sleeved in the packaging tube, the two wavelength division multiplexing units are respectively located in two end portions of the packaging tube, and outer sleeves 25 of the two wavelength division multiplexing units 20 are respectively inserted into two ends of the packaging tube 10.
The wavelength division multiplexer comprises the following assembly steps: 1) at least three optical fibers 101, 02 and 103 are inserted into the ferrule hole 211 in the capillary 21 to assemble a three-core optical fiber bundle; 2) the three-core optical fiber bundle is inserted into the outer sleeve 25, then the self-focusing lens 22 and the wavelength division multiplexing diaphragm 23 are assembled in sequence, and the reflection end component is assembled by debugging optical parameters; 3) the reflecting end component is attached to the total reflection membrane, and then optical parameters are debugged to assemble a wavelength division multiplexing unit; 4) two wavelength division multiplexing units with the same wavelength (or different wavelengths) are respectively inserted into two ends of the packaging tube to assemble a sealed combined device.
In summary, the technical solutions of the present invention can fully and effectively achieve the above objects, and the structural and functional principles of the present invention have been fully verified in the embodiments, so as to achieve the expected efficacy and objects, and various changes or modifications can be made to the embodiments of the present invention without departing from the principles and spirit of the present invention. Accordingly, this invention includes all modifications encompassed within the scope of the claims appended hereto, and any equivalents thereof which fall within the scope of the claims appended hereto.
Claims (6)
1. A wavelength division multiplexer for 5G forward transmission comprises a packaging tube and is characterized in that at least one group of wavelength division multiplexing units are sleeved in the packaging tube, each wavelength division multiplexing unit comprises a capillary tube for inserting at least one incident optical fiber and at least two emergent optical fibers at the same side, one end face of each capillary tube is attached with a self-focusing lens for focusing divergent light in the incident optical fiber into a Gaussian beam, the other end face of each self-focusing lens is attached with a wavelength division multiplexing membrane for reflecting one part of beams in the Gaussian beam to a position corresponding to one emergent optical fiber and allowing the other part of beams to pass through, and the other side of each wavelength division multiplexing membrane is attached with a total reflection membrane for reflecting the beams passing through the wavelength division multiplexing membrane to a position corresponding to the other emergent optical fiber.
2. The wavelength division multiplexer for 5G fronthaul according to claim 1, wherein: at least three inserting core holes for inserting optical fibers are formed in the capillary tube, and an inclined plane is formed at one end face of the capillary tube.
3. The wavelength division multiplexer for 5G fronthaul according to claim 2, wherein: one end face of the capillary tube forms an inclined plane with an included angle of 8 degrees.
4. The wavelength division multiplexer for 5G fronthaul according to claim 1, wherein: the capillary tube is also sleeved with an outer sleeve, the capillary tube penetrates through the outer sleeve to be in butt joint with the end face of the self-focusing lens, and the outer sleeve is inserted into one end of the packaging tube.
5. The wavelength division multiplexer for 5G fronthaul according to claim 1, wherein: the outer sleeve and the packaging tube are bonded and fixed by glue.
6. A wavelength division multiplexer for 5G forward transmission according to any one of claims 1 to 5, wherein: the two wavelength division multiplexing units are respectively arranged in the two end parts of the packaging tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110539539.4A CN113238321A (en) | 2021-05-18 | 2021-05-18 | Wavelength division multiplexer for 5G forward transmission |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110539539.4A CN113238321A (en) | 2021-05-18 | 2021-05-18 | Wavelength division multiplexer for 5G forward transmission |
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| CN113238321A true CN113238321A (en) | 2021-08-10 |
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| CN202110539539.4A Pending CN113238321A (en) | 2021-05-18 | 2021-05-18 | Wavelength division multiplexer for 5G forward transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116263523A (en) * | 2021-12-14 | 2023-06-16 | 华为技术有限公司 | Multi-core optical fiber connecting device |
Citations (7)
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|---|---|---|---|---|
| CN1327163A (en) * | 2000-05-23 | 2001-12-19 | 安联光纤产品有限公司 | Three core port optic fiber back reflective laser |
| CN206178193U (en) * | 2016-11-17 | 2017-05-17 | 北极光电(深圳)有限公司 | Double -diaphragm wavelength division multiplexer |
| CN206400143U (en) * | 2016-12-26 | 2017-08-11 | 上海中科光纤通讯器件有限公司 | 3 x 1 wavelength division multiplexer |
| CN206892395U (en) * | 2016-12-20 | 2018-01-16 | 上海中科光纤通讯器件有限公司 | 3 x 0 wave division multiplexer |
| CN209148906U (en) * | 2018-12-28 | 2019-07-23 | 长春市华信科瑞光电技术有限公司 | Reflective wavelength division multiplexer |
| CN212808694U (en) * | 2020-08-11 | 2021-03-26 | 上海中科光纤通讯器件有限公司 | Compact type online three-port optical fiber wavelength division multiplexer with high coaxiality |
| CN214954210U (en) * | 2021-05-18 | 2021-11-30 | 北极光电(深圳)有限公司 | Wavelength division multiplexer for 5G forward transmission |
-
2021
- 2021-05-18 CN CN202110539539.4A patent/CN113238321A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327163A (en) * | 2000-05-23 | 2001-12-19 | 安联光纤产品有限公司 | Three core port optic fiber back reflective laser |
| CN206178193U (en) * | 2016-11-17 | 2017-05-17 | 北极光电(深圳)有限公司 | Double -diaphragm wavelength division multiplexer |
| CN206892395U (en) * | 2016-12-20 | 2018-01-16 | 上海中科光纤通讯器件有限公司 | 3 x 0 wave division multiplexer |
| CN206400143U (en) * | 2016-12-26 | 2017-08-11 | 上海中科光纤通讯器件有限公司 | 3 x 1 wavelength division multiplexer |
| CN209148906U (en) * | 2018-12-28 | 2019-07-23 | 长春市华信科瑞光电技术有限公司 | Reflective wavelength division multiplexer |
| CN212808694U (en) * | 2020-08-11 | 2021-03-26 | 上海中科光纤通讯器件有限公司 | Compact type online three-port optical fiber wavelength division multiplexer with high coaxiality |
| CN214954210U (en) * | 2021-05-18 | 2021-11-30 | 北极光电(深圳)有限公司 | Wavelength division multiplexer for 5G forward transmission |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116263523A (en) * | 2021-12-14 | 2023-06-16 | 华为技术有限公司 | Multi-core optical fiber connecting device |
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Application publication date: 20210810 |
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