CN109212669A - A kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network - Google Patents
A kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network Download PDFInfo
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- CN109212669A CN109212669A CN201811136861.7A CN201811136861A CN109212669A CN 109212669 A CN109212669 A CN 109212669A CN 201811136861 A CN201811136861 A CN 201811136861A CN 109212669 A CN109212669 A CN 109212669A
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- 239000000835 fiber Substances 0.000 claims abstract description 89
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- 238000001914 filtration Methods 0.000 claims abstract description 49
- 230000003287 optical effect Effects 0.000 claims description 90
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- 230000005540 biological transmission Effects 0.000 claims description 8
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- 239000010408 film Substances 0.000 description 51
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- 238000010295 mobile communication Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
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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
- G02B6/32—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
- G02B6/28—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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
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Abstract
The invention discloses a kind of ultra-compact multichannel wavelength division multiplexers for 5G optical-fiber network, include: one has the fiber array of n root optical fiber, and one has the fiber array of 2n root small-bend radius optical fiber, two condenser lenses, one sheet of film filter plate, three sections of glass tubes；Two condenser lenses are respectively the first condenser lens and the second condenser lens；Three sections of glass tubes, respectively the first glass tube, the second glass tube and third glass tube；One sheet of film filter plate is placed among first condenser lens and the second condenser lens, this three is fixed in the second glass tube；First condenser lens, the second glass tube, film filtering slice, the second condenser lens are referred to as intermediate module, the fiber array of 2n root small-bend radius is Nian Jie with intermediate member by the first glass tube, and the fiber array of n root optical fiber is Nian Jie with intermediate module by third glass tube.
Description
Technical field
The present invention relates to 5G mobile communication fields, more particularly to a kind of ultra-compact multichannel wavelength-division for 5G optical-fiber network
Multiplexer.
Background technique
5G network is the inevitable choice of the following mobile operator, and the characteristics of 5G network is exactly network more crypto set, with reality
The service of existing high-throughput, low latency.The densification for realizing network needs in entire wireless access network (RAN), Mei Geji
Hundred meters are just disposed a small-sized honeycomb base station, or are split existing macro base station sector and carried out hoist capacity.Either for small-sized
Base station or macro base station, C-RAN are the enabled frameworks for realizing RAN, are laid the foundation for 5G.Therefore, C-RAN is exactly current wireless
One main trend of industry.
WDM network system can ideally support the mobile application of rapid growth, such as distributing antenna system (DAS), small
Type cellular base station and Wi-Fi backhaul and/or C-RAN forward pass.To maximally utilise existing fiber assets, operator is showing
Have using wavelength-division multiplex (WDM) technology on optical fiber, 8,16, even 40 channels are obtained by single fiber.Single fiber
The channel of upper operation is more, and overall cost is lower.WDM, which refers to, to be used multiple wavelength (wavelength multiplexing) or is incited somebody to action in single fiber
The method that simple optical fiber containing multiple wavelength is separated into a plurality of optical fiber (demultiplexing) containing different wave length, the light of each wavelength
Carry different signals.Can be used in passive WDM, when multiplexing optical filter it is default allow by wave-length coverage；It demultiplexes
Used time allows the wavelength of another range to pass through by film filter technology.When thin film layer stack stacks, the table between them
Continuous reflection caused by face will form interference effect, so that it be made only specific wavelength to be allowed to pass through, and carry out to other wavelength
Reflection.
And it is used to establish the C-RAN system of 5G network, for WDM device in volume, performance, reliability, cost etc.
It is required that being obviously improved.For the optimization of whole system volume and cost, the volume and cost requirement especially to WDM device are harsh.
The solution of existing multichannel WDM is substantially the optical fiber based on multichannel, multichannel collimator, by free sky
Between propagate, the mode filtered step by step, patent CN201280004164.0, by light beam between multiple film filters multiple reflections
Mode, each wavelength is filtered out, then using isolated collimator reception.Film filter is bonded on one substrate, is contained
There is the signal light of multiple wavelength to enter common end, it, can be by the letter of specific wavelength by the filtering step by step of different film filters
Number light leaching comes out.Patent CN201510623851.6 and similar filtering mode, it is just with prism wedge that optical path is inclined
Turn, so that collimator, which seems, is parallel to box body, which is also to be filtered by multiple film filters, then quasi- with multiple separation
The received mode of straight device.The difference is that joined two prism wedges, so that incident parallel with outgoing collimator.Convenient for envelope
Dress.Patent CN201511023797.8 has used increasingly complex structure, it is only for keeps volume more compact, is divided and connects
It is identical as first and second kinds to receive principle, has only used some prisms, overall dimensions is compressed.
Above-mentioned cited three patent embodiments, feature is using multiple optical fiber, and each optical fiber filters out a wavelength, causes into
This increase；It can not accomplish using multiple collimator structures, in volume ultimate attainment；Structure is complicated, and producting process difficulty is big, and reliability is not
It is high.
Summary of the invention
Goal of the invention: the purpose of the present invention is intended to overcome that existing multichannel wavelength division multiplexer volume is larger, structure is complicated, cost
Height is unfavorable for the problems such as popularity of 5G network C-RAN technology.
The present invention provides a kind of ultra-compact multichannel wavelength division multiplexers for 5G optical-fiber network, comprising: one has n root light
Fine fiber array (1), one there is the fiber array (2), two condenser lenses, one sheet of film of 2n root small-bend radius optical fiber to filter
Wave plate (505) and three sections of glass tubes；N value is natural number.
Two condenser lenses are respectively the first condenser lens (503) and the second condenser lens (506)；
Three sections of glass tubes, respectively the first glass tube (501), the second glass tube (504) and third glass tube (508)；
Wherein, one sheet of film filter plate (505) are placed among the first condenser lens (503) and the second condenser lens (506),
This three is fixed in the second glass tube (504)；
First condenser lens (503), the second glass tube (504), film filtering slice (505), the second condenser lens (506) system
The fiber array (2) of referred to as intermediate module, 2n root small-bend radius is Nian Jie with intermediate member by the first glass tube (501), n root
The fiber array (1) of optical fiber is Nian Jie with intermediate module by third glass tube (508)；
Optical fiber in the fiber array (2) of the 2n root small-bend radius, which refers to, meets G.657.B3 (2009) standard,
The bending loss of one circle is less than or equal to the optical fiber of 0.45dB when bending radius is 5mm.
The fiber array (1) includes n root optical fiber such as (512,517,522,528 ...)；
The fiber array (1) is for the transmission after optical fiber demultiplexing
The fiber array (2) includes 2n root light such as (500,502,514,520,526,513,519,523,525 ...)
It is fine；
Signal during the fiber array (2) is used to demultiplex separates and transmission step by step.
Collimation of first condenser lens (503) for mixed light beam before separating step by step, the second condenser lens (506) are used
In the collimation of the light beam for the n wavelength isolated.
Remaining wavelength is mixed after the film filtering slice (505) is used for the separation step by step of the light beam of n wavelength and separates
The reflection of light combination beam.
First glass tube (501) is fixed to contain the position of the fiber array (2) of 2n root small-bend radius optical fiber
And the connection of fiber array (2) and the first condenser lens (503)；
Second glass tube (504) is for the first condenser lens (503), the second condenser lens (506) and film filtering
The position of piece (505) is fixed and the connection of the first condenser lens (503) and film filtering slice (505), film filtering slice (505)
With the connection of the second condenser lens (506)；
The third glass tube (508) is fixed to contain the position of the fiber array (1) of n root optical fiber and fiber array
(1) with the connection of the second condenser lens (506).
The multiplexer is filtered step by step using film filtering slice (505), and the difference according to each incident angle Θ is step by step
The light beam of n wavelength is filtered out, steps are as follows:
Step 1, the signal comprising n wavelength enters optical fiber (500), and the optical fiber (500) is that fiber array (2) includes
An optical fiber in 2n root optical fiber, signal light enter the first condenser lens (503), and collimated light is incident to film with angle Θ 1 and filters
Wave plate (505), wavelength X 1 is transmitted through optical path (511), and coupled into optical fibres (512), realizes the separation of first wavelength X 1, institute
Stating optical fiber (512) is an optical fiber in n root optical fiber that fiber array (1) includes；
Step 2, wavelength X 2, λ 3, λ 4 ... λ n is reflected through optical path (510), and coupled into optical fibres, then passes through small bending half
Diameter optical fiber (513) enters optical fiber (514), and the light that optical fiber (514) issues passes through the first condenser lens (503), with the angle of Θ 2
It is incident on film filtering slice (505), wavelength X 2 is transmitted through optical path (516), and coupled into optical fibres (517), realizes wavelength X 2
Separation, the optical fiber (513) is an optical fiber in the 2n root optical fiber that fiber array (2) includes, and optical fiber (514) is optical fiber array
The optical fiber in 2n root optical fiber that column (2) include, optical fiber (517) is a light in the n root optical fiber that fiber array (1) includes
It is fine；
Step 3, wavelength X 3, λ 4 ... λ n is reflected through optical path (515), and coupled into optical fibres, then passes through small-bend radius
Optical fiber (519) enters optical fiber (520), and the light that optical fiber (520) issues passes through the first condenser lens (503), is entered with the angle of Θ 3
It is mapped on film filtering slice (505), wavelength X 3 is transmitted through optical path (521), and coupled into optical fibres (522), realizes wavelength X 3
Separation, the optical fiber (519) is an optical fiber in the 2n root optical fiber that fiber array (2) includes, and optical fiber (520) is fiber array
(2) optical fiber in 2n root optical fiber for including, optical fiber (522) are a light in the n root optical fiber that fiber array (1) includes
It is fine；
Step 4, λ n in wavelength X 4 ... is reflected through optical path (518), and coupled into optical fibres, then passes through small-bend radius optical fiber
(525) it enters optical fiber (526), the light that optical fiber (526) issues passes through the first condenser lens (503), is incident on the angle of Θ 4
On optical fiber (505), wavelength X 4 is transmitted through optical path (527), and coupled into optical fibres (528), realizes the separation of wavelength X 4, optical fiber
It (525) is an optical fiber in 2n root optical fiber that fiber array (2) includes, optical fiber (526) is the 2n root that fiber array (2) includes
An optical fiber in optical fiber, optical fiber (528) are an optical fiber in the n root optical fiber that fiber array (1) includes；
Step 5, other wavelength are reflected through optical path (523), and coupled into optical fibres (523), repeat step 1~step 4, until
The signal of n wavelength separates finish step by step, and optical fiber (523) is an optical fiber in the 2n root optical fiber that fiber array (2) includes.
The present invention can satisfy the requirement of the following 5G communication system sun adjuster part, greatly reduce networking in terms of optical device
Cost, improve the reliability of system, structure is extremely compact, at low cost, simple process is realized, conducive to the general of 5G mobile communication
And application and networking cost reduce.
The utility model has the advantages that the present invention has the following advantages and effects with respect to the prior art:
(1) the present invention provides a kind of wavelength division multiplexer of ultra-compact, small in size, at low cost, realization simply, is suitable for
5G application of net is conducive to the popularization and application of C-RAN system；
(2) present invention uses the characteristic that using small-bend radius and optical fiber different incidence angles are carried out with wavelength selection, into
Row filters step by step, to achieve the purpose that wavelength-division；
(3) integral device of the present invention is connected by glass tube, and structure is simple, and volume can be contracted to the 1/5 of conventional method,
Space is greatly saved；
(4) present invention has achieved the purpose that demultiplexing by multiple utilize to optical fiber, and the present invention also can be reversed use,
It can achieve the purpose of multiplexing.
Detailed description of the invention
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, it is of the invention above-mentioned or
Otherwise advantage will become apparent.
Fig. 1 is the filtering schematic diagram of film filter.
Fig. 2 is optical path and structural schematic diagram of the invention.
Fig. 3 is software emulation figure of the invention, can show true light propagation path.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
The invention discloses a kind of ultra-compact multichannel wavelength division multiplexers for 5G optical-fiber network, comprising: one has n root light
Fine fiber array 1, one has fiber array 2, two condenser lenses, one sheet of film filter plates of 2n root small-bend radius optical fiber
505 and three sections of glass tubes；
Two condenser lenses are respectively the first condenser lens 503 and the second condenser lens 506, and three sections of glass tubes are respectively
One glass tube 501, the second glass tube 504 and third glass tube 508；
Wherein, one sheet of film filter plate 505, this three are placed among the first condenser lens 503 and the second condenser lens 506
It is fixed in the second glass tube 504；
First condenser lens 503, the second glass tube 504, film filtering slice 505, the second condenser lens 506 are referred to as centre
The fiber array 2 of component, 2n root small-bend radius is Nian Jie with intermediate member by the first glass tube 501, the optical fiber array of n root optical fiber
Column 1 are Nian Jie with intermediate module by third glass tube 508；
Optical fiber in the fiber array 2 of the 2n root small-bend radius, which refers to, meets G.657.B3 (2009) standard, curved
The bending loss of one circle is less than or equal to the optical fiber of 0.45dB when bilge radius is 5mm.
As shown in Fig. 2, the fiber array 1 waits n root optical fiber comprising 512,517,522,528 ...；
The fiber array 1 is for the transmission after optical fiber demultiplexing.
The fiber array 2 waits 2n root optical fiber comprising 500,502,514,520,526,513,519,523,525 ...；
Signal during the fiber array 2 is used to demultiplex separates and transmission step by step.
Collimation of first condenser lens 503 for mixed light beam before separating step by step, the second condenser lens 506 is for dividing
The collimation of the light beam of the n wavelength separated out.
Mixing of the film filtering slice 505 for remaining wavelength after the separation step by step and separation of the light beam of n wavelength
The reflection of light beam.
Position of first glass tube 501 for fiber array 2 is fixed and fiber array 2 and the first condenser lens
503 connection；
Second glass tube 504 is for the first condenser lens 503, the second condenser lens 506 and film filtering slice 505
Position is fixed and connection, film filtering slice 505 and the second condenser lens of the first condenser lens 503 and film filtering slice 505
506 connection；
Position of the third glass tube 508 for fiber array 1 is fixed and fiber array 1 and the second condenser lens
506 connection.
It is filtered step by step using film filtering slice 505, the difference according to each incident angle Θ filters out n wave step by step
Long light beam, steps are as follows:
Step 1, the signal comprising n wavelength enters optical fiber 500, and the optical fiber 500 is the 2n root light that fiber array 2 includes
An optical fiber in fibre, signal light enter the first condenser lens 503, and collimated light is incident to film filtering slice 505 with angle Θ 1,
Wavelength X 1 is transmitted through optical path 511, and coupled into optical fibres 512, realizes the separation of first wavelength X 1, the optical fiber 512 is light
The optical fiber in n root optical fiber that fibre array 1 includes；
Step 2, wavelength X 2, λ 3, λ 4 ... λ n is reflected through optical path 510, and coupled into optical fibres, then passes through small-bend radius
Optical fiber (513) enters optical fiber 514, and the light that optical fiber 514 issues is passed through the first condenser lens 503, is incident on the angle of Θ 2 thin
On membrane filtration wave plate 505, wavelength X 2 is transmitted through optical path 516, and coupled into optical fibres 517, realizes the separation of wavelength X 2, the optical fiber
513 be an optical fiber in the 2n root optical fiber that fiber array 2 includes, and optical fiber 514 is in the 2n root optical fiber that fiber array 2 includes
A piece optical fiber, optical fiber 517 are an optical fiber in the n root optical fiber that fiber array 1 includes；
Step 3, wavelength X 3, λ 4 ... λ n is reflected through optical path 515, and coupled into optical fibres, then passes through small-bend radius light
Fibre 519 enters optical fiber 520, optical fiber 52) light that issues by the first condenser lens 503, is incident on film filter with the angle of Θ 3
On wave plate 505, wavelength X 3 is transmitted through optical path 521, and coupled into optical fibres 522, realizes the separation of wavelength X 3, the optical fiber 519
It is an optical fiber in 2n root optical fiber that fiber array 2 includes, optical fiber 520 is one in the 2n root optical fiber that fiber array 2 includes
Root optical fiber, optical fiber 522 are an optical fiber in the n root optical fiber that fiber array 1 includes；
Step 4, λ n in wavelength X 4 ... is reflected through optical path 518, and coupled into optical fibres, then passes through small-bend radius optical fiber
525 enter optical fiber 526, and the light that optical fiber 526 issues passes through the first condenser lens 503, is incident on optical fiber 505 with the angle of Θ 4
On, wavelength X 4 is transmitted through optical path 527, and coupled into optical fibres 528, realizes the separation of wavelength X 4, optical fiber 525 is fiber array 2
The optical fiber in 2n root optical fiber for including, optical fiber 526 are an optical fiber in the 2n root optical fiber that fiber array 2 includes, optical fiber
528 be an optical fiber in the n root optical fiber that fiber array 1 includes；
Step 5, other wavelength are reflected through optical path 523, and coupled into optical fibres 523, repeat step 1~step 4, until n
The signal of wavelength separates finish step by step, and optical fiber 523 is an optical fiber in the 2n root optical fiber that fiber array 2 includes.
Embodiment
The present invention comprising one as shown in Fig. 2, mainly have the fiber array 1 of n (n=1,2,3,4) root optical fiber, one has 2n
The fiber array 2 of root small-bend radius optical fiber, two condenser lenses (503, the 506 of Fig. 2), one sheet of film filter plate be (Fig. 2's
505), three sections of glass tubes (501,504, the 508 of Fig. 2).
The fiber array 1 includes n (n=1,2,3,4) root optical fiber, the transmission after being mainly used for optical fiber demultiplexing；
The fiber array 2 includes 2n root small-bend radius optical fiber, is mainly used for the signal during demultiplexing and divides step by step
From with transmission；
The collimation of mixed light beam before the condenser lens 503 is mainly used for separating step by step, condenser lens 506 are mainly used for point
The collimation of the light beam of 4 wavelength (λ 1, λ 2, λ 3, λ 4) separated out.
After the film filtering slice is mainly used for the separation step by step and separation of the light beam of 4 wavelength (λ 1, λ 2, λ 3, λ 4)
The reflection of the mixed light beam of remaining wavelength.
The glass tube 501 is fixed to contain the position of the fiber array 2 of 2n root small-bend radius optical fiber and optical fiber
The connection of array 2 and collimation lens 503.
The glass tube 504 for collimation lens 503, collimation lens 506 and film filtering slice 505 position fix and
Collimation lens 503 and the connection of film filtering slice 505, the connection of film filtering slice 505 and collimation lens 506.
The glass tube 508 is fixed to contain the position of the fiber array 1 of n (n=1,2,3,4) root optical fiber and optical fiber
The connection of array 1 and collimation lens 506.
It is filtered step by step using the same film filtering slice 505, the difference according to each incident angle Θ filters out 4 step by step
The light beam of a wavelength (λ 1, λ 2, λ 3, λ 4).Steps are as follows:
(1) signal comprising multiple wavelength enters optical fiber 500, and by taking 4 wavelength as an example, actual use is not limited to the present embodiment
4 wavelength can be fewer or greater than 4 wavelength.Signal light enters collimation lens 503, and optical signal is collimated as shown in Figure 3.
Collimated light is incident to film filtering slice 505 with angle Θ 1, and wavelength X 1 is transmitted through optical path 511, and coupled into optical fibres 512, realizes
The separation of wavelength X 1.
(2) wavelength X 2, λ 3, λ 4 is reflected through optical path 510, and coupled into optical fibres, then by small-bend radius optical fiber 513 into
Enter the light issued to optical fiber 514,514 by collimation lens 503, is incident on film filtering slice 505 with the angle of Θ 2, wavelength X
2 transmit through optical path 516, and coupled into optical fibres 517, realize the separation of wavelength X 2.
(3) wavelength X 3, λ 4 is reflected through optical path 515, and coupled into optical fibres, is then entered by small-bend radius optical fiber 519
The light issued to optical fiber 520,520 passes through collimation lens 503, is incident on film filtering slice 505 with the angle of Θ 3, wavelength X 3
It is transmitted through optical path 521, and coupled into optical fibres 522, realizes the separation of wavelength X 3.
(4) wavelength X 4 is reflected through optical path 518, and coupled into optical fibres, then enters light by small-bend radius optical fiber 525
The light that fibre 526,526 issues passes through collimation lens 503, is incident on film filtering slice 505 with the angle of Θ 4, wavelength X 4 is through light
Road 527 transmits, and coupled into optical fibres 528, realizes the separation of wavelength X 4.
(5) other wavelength are reflected through optical path 523, and coupled into optical fibres 523.
Signal into optical fiber 500 may include n wavelength, and n is not limited to 4 wavelength, can be fewer or greater than 4 waves
It is long.
This multichannel wavelength division multiplexer can be reversed use, achieve the purpose that multiplexing.
The characteristic that using small-bend radius and optical fiber different incidence angles are carried out with wavelength selection in 2n root optical fiber end, is carried out
It filters step by step, to achieve the purpose that wavelength-division.
For one sheet of film filter plate, different incidence angles can penetrate different wavelength, as shown in Figure 1, wherein
401 be incident mixed light beam (λ 1, λ 2, λ 3, λ 4)；400 be film filtering slice, the separation for mixed light beam；402 is through films
The wavelength that filter plate is isolated is the light beam of λ 3；403 be the incidence angle Θ 3 of mixed light beam 401；404 be anti-through film filtering slice
Mixed light beam (λ 1, λ 2, λ 4) after penetrating；405 be the normal of film filtering slice；
As shown in Figure 1, multiple signal wavelengths are incident on film filter, there is the signal light projection an of wavelength, remaining
It is reflected, specifically includes light beam being incident on film filtering slice 400 with Θ 3 of 4 wavelength (λ 1, λ 2, λ 3, λ 4), through excessively thin
The filtering of membrane filtration wave plate, λ 3 can then penetrate film filtering slice, and λ 1, λ 2, λ 4 can then reflect, and the optical path along 403 is advanced.This principle is
Basis of the invention.
As shown in Figure 2: the signal comprising multiple wavelength enters optical fiber 500, and the present embodiment actually makes by taking 4 wavelength as an example
With 4 wavelength are not limited to, 4 wavelength can be fewer or greater than.Signal light enters collimation lens 503, and optical signal is collimated such as
Shown in Fig. 3.Collimated light is incident to film filtering slice 505 with angle Θ 1, and wavelength X 1 is transmitted through optical path 511, and coupled into optical fibres
512.Wavelength X 2, λ 3, λ 4 is reflected through optical path 510, and coupled into optical fibres, then enters light by small-bend radius optical fiber 513
The light that fibre 514,514 issues passes through collimation lens 503, is incident on film filtering slice 505 with the angle of Θ 2, wavelength X 2 is through light
Road 516 transmits, and coupled into optical fibres 517.
Similarly, wavelength X 3, λ 4 is filtered out respectively and coupled into optical fibres 522 and 528.
Integral device is connected by glass tube 501,504 and 508.Structure is simple, and volume can be contracted to conventional method
1/5, space is greatly saved.
It, can be with from there through to optical fiber multiple, using demultiplexing has been achieved the purpose that, the present invention also can be reversed use
Achieve the purpose that multiplexing.
The signal demultiplexing of 4 wavelength:
(1) signal comprising 4 wavelength enters optical fiber 500, and then signal light enters collimation lens 503, and optical signal is quasi-
It is straight as shown in Figure 3.Collimated light is incident to film filtering slice 505 with angle Θ 1, and wavelength X 1 is transmitted through optical path 511, and is coupled into
Optical fiber 512 realizes the separation of wavelength X 1.
(2) wavelength X 2, λ 3, λ 4 is reflected through optical path 510, and coupled into optical fibres, then by small-bend radius optical fiber 513 into
Enter the light issued to optical fiber 514,514 by collimation lens 503, is incident on film filtering slice 505 with the angle of Θ 2, wavelength X
2 transmit through optical path 516, and coupled into optical fibres 517, realize the separation of wavelength X 2.
(3) wavelength X 3, λ 4 is reflected through optical path 515, and coupled into optical fibres, is then entered by small-bend radius optical fiber 519
The light issued to optical fiber 520,520 passes through collimation lens 503, is incident on film filtering slice 505 with the angle of Θ 3, wavelength X 3
It is transmitted through optical path 521, and coupled into optical fibres 522, realizes the separation of wavelength X 3.
(4) wavelength X 4 is reflected through optical path 518, and coupled into optical fibres, then enters light by small-bend radius optical fiber 525
The light that fibre 526,526 issues passes through collimation lens 503, is incident on film filtering slice 505 with the angle of Θ 4, wavelength X 4 is through light
Road 527 transmits, and coupled into optical fibres 528, realizes the separation of wavelength X 4.
(5) other wavelength are reflected through optical path 523, and coupled into optical fibres 523.
The present invention provides a kind of ultra-compact multichannel wavelength division multiplexers for 5G optical-fiber network, implement the technical side
There are many method and approach of case, the above is only a preferred embodiment of the present invention, it is noted that for the art
For those of ordinary skill, various improvements and modifications may be made without departing from the principle of the present invention, these improvement
It also should be regarded as protection scope of the present invention with retouching.The available prior art of each component part being not known in the present embodiment is subject to
It realizes.
Claims (8)
1. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network characterized by comprising one has n root optical fiber
Fiber array (1), a fiber array (2), two condenser lenses, one sheet of film for having 2n root small-bend radius optical fiber filters
Piece (505) and three sections of glass tubes；
Two condenser lenses are respectively the first condenser lens (503) and the second condenser lens (506)；
Three sections of glass tubes, respectively the first glass tube (501), the second glass tube (504) and third glass tube (508)；
Wherein, one sheet of film filter plate (505) are placed among the first condenser lens (503) and the second condenser lens (506), this three
Person is fixed in the second glass tube (504)；
First condenser lens (503), the second glass tube (504), film filtering slice (505), the second condenser lens (506) are referred to as
The fiber array (2) of intermediate module, 2n root small-bend radius is Nian Jie with intermediate member by the first glass tube (501), n root optical fiber
Fiber array (1) by third glass tube (508) it is Nian Jie with intermediate module.
2. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network according to claim 1, which is characterized in that
Optical fiber in the fiber array (2) of the 2n root small-bend radius, which refers to, meets G.657.B3 (2009) standard, bending radius
The bending loss of one circle is less than or equal to the optical fiber of 0.45dB when for 5mm.
3. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network according to claim 2, which is characterized in that
The fiber array (1) is for the transmission after optical fiber demultiplexing.
4. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network according to claim 3, which is characterized in that
Signal during the fiber array (2) is used to demultiplex separates and transmission step by step.
5. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network according to claim 4, which is characterized in that
Collimation of first condenser lens (503) for mixed light beam before separating step by step, the second condenser lens (506) is for isolating
N wavelength light beam collimation.
6. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network according to claim 5, which is characterized in that
The film filtering slice (505) is for the mixed light beam of remaining wavelength after the separation step by step and separation of the light beam of n wavelength
Reflection.
7. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network according to claim 6, which is characterized in that
First glass tube (501) is fixed to contain the position of the fiber array (2) of 2n root small-bend radius optical fiber and optical fiber
The connection of array (2) and the first condenser lens (503)；
Second glass tube (504) is for the first condenser lens (503), the second condenser lens (506) and film filtering slice
(505) position is fixed and the connection of the first condenser lens (503) and film filtering slice (505), film filtering slice (505) with
The connection of second condenser lens (506)；
Position of the third glass tube (508) for fiber array (1) is fixed and fiber array (1) and the second condenser lens
(506) connection.
8. a kind of ultra-compact multichannel wavelength division multiplexer for 5G optical-fiber network according to claim 7, which is characterized in that
The multiplexer is filtered step by step using film filtering slice (505), and the difference according to each incident angle Θ filters out n step by step
The light beam of wavelength, steps are as follows:
Step 1, the signal comprising n wavelength enters optical fiber (500), and the optical fiber (500) is the 2n root that fiber array (2) includes
An optical fiber in optical fiber, signal light enter the first condenser lens (503), and collimated light is incident to film filtering slice with angle Θ 1
(505), wavelength X 1 is transmitted through optical path (511), and coupled into optical fibres (512), realizes the separation of first wavelength X 1, the light
Fine (512) are an optical fiber in the n root optical fiber that fiber array (1) includes；
Step 2, wavelength X 2, λ 3, λ 4 ... λ n is reflected through optical path (510), and coupled into optical fibres, then passes through small-bend radius light
Fine (513) enter optical fiber (514), and the light that optical fiber (514) issues passes through the first condenser lens (503), incident with the angle of Θ 2
To on film filtering slice (505), wavelength X 2 is transmitted through optical path (516), and coupled into optical fibres (517), realizes point of wavelength X 2
From the optical fiber (513) is an optical fiber in the 2n root optical fiber that fiber array (2) includes, and optical fiber (514) is fiber array
(2) optical fiber in 2n root optical fiber for including, optical fiber (517) are a light in the n root optical fiber that fiber array (1) includes
It is fine；
Step 3, wavelength X 3, λ 4 ... λ n is reflected through optical path (515), and coupled into optical fibres, then passes through small-bend radius optical fiber
(519) it enters optical fiber (520), the light that optical fiber (520) issues passes through the first condenser lens (503), is incident on the angle of Θ 3
On film filtering slice (505), wavelength X 3 is transmitted through optical path (521), and coupled into optical fibres (522), realizes the separation of wavelength X 3,
The optical fiber (519) is an optical fiber in the 2n root optical fiber that fiber array (2) includes, and optical fiber (520) is fiber array (2) packet
The optical fiber in 2n root optical fiber contained, optical fiber (522) are an optical fiber in the n root optical fiber that fiber array (1) includes；
Step 4, λ n in wavelength X 4 ... is reflected through optical path (518), and coupled into optical fibres, then passes through small-bend radius optical fiber
(525) it enters optical fiber (526), the light that optical fiber (526) issues passes through the first condenser lens (503), is incident on the angle of Θ 4
On optical fiber (505), wavelength X 4 is transmitted through optical path (527), and is coupled into order optical fiber (528), realizes the separation of wavelength X 4, light
Fine (525) are an optical fiber in the 2n root optical fiber that fiber array (2) includes, and optical fiber (526) is the 2n that fiber array (2) includes
An optical fiber in root optical fiber, optical fiber (528) are an optical fiber in the n root optical fiber that fiber array (1) includes；
Step 5, other wavelength are reflected through optical path (523), and coupled into optical fibres (523), repeat step 1~step 4, until n
The signal of wavelength separates finish step by step, and optical fiber (523) is an optical fiber in the 2n root optical fiber that fiber array (2) includes.
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| CN112882159A (en) * | 2021-03-03 | 2021-06-01 | 南京华脉科技股份有限公司 | Integrated wavelength division multiplexer |
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| CN109212669B (en) | 2020-05-19 |
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Application publication date: 20190115 Assignee: Zhongtongfu Smart City Engineering Construction Co.,Ltd. Assignor: CHINA INFORMATION CONSULTING & DESIGNING INSTITUTE Co.,Ltd. Contract record no.: X2024980003828 Denomination of invention: A Super Compact Multi wavelength Division Multiplexer for 5G Optical Networks Granted publication date: 20200519 License type: Common License Record date: 20240402 |