CN107272115A - A kind of pattern multiplexer/demultiplexer based on three core fibres - Google Patents
A kind of pattern multiplexer/demultiplexer based on three core fibres Download PDFInfo
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- CN107272115A CN107272115A CN201710690030.3A CN201710690030A CN107272115A CN 107272115 A CN107272115 A CN 107272115A CN 201710690030 A CN201710690030 A CN 201710690030A CN 107272115 A CN107272115 A CN 107272115A
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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
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- H—ELECTRICITY
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Abstract
The present invention relates to a kind of pattern multiplexer/demultiplexer based on three core fibres, multiplexer includes main body, single-mode fiber I, single-mode fiber II and less fundamental mode optical fibre, single-mode fiber I and single-mode fiber II are in one end of main body, the other end of the less fundamental mode optical fibre in main body, main body is with LPFG in three core fibres being made up of fibre core I, fibre core II, fibre core III and covering, fibre core III.Using the relative position relation of two fiber core with single-mold and few mould fibre core of write-in LPFG, fibre core I, the LP of fibre core II can be made01The LP of mould respectively with two degeneracys in fibre core III11Mould is coupled, then is inputted and exported by the single-mode fiber and less fundamental mode optical fibre of matching, so that by inputting LP to two single-mode fibers01Mould achieves that LP in less fundamental mode optical fibre11,aMould and LP11,bThe mode multiplexing of mould, can also realize and input LP to less fundamental mode optical fibre11,aMould and LP11,bMould resolves into the LP of two single-mode fibers01The pattern demultiplexing of mould, being applied in mode division multiplexing system has relatively low loss and crosstalk.
Description
Technical field
The present invention relates to a kind of pattern multiplexer/demultiplexer based on three core fibres, belong to the mould based on less fundamental mode optical fibre
Divide field of multiplex communication.
Background technology
Up to the present, optical fiber telecommunications system mainly maintains people using wavelength-division multiplex technique to network traffic demand
Sustained growth.However, single-mode fiber is limited by itself inherent nonlinearity effect, the utilization to its transmission capacity has tended to
The limit.Mode division multiplexing technology based on less fundamental mode optical fibre can be obviously improved the transmission capacity of system, be considered as optic communication of future generation
Technology.
Some pattern in mode division multiplexing technology based on less fundamental mode optical fibre, no longer single use less fundamental mode optical fibre is, it is necessary to few mould
Transmitted in optical fiber while multiple patterns, stably.Therefore, pattern multiplexer is needed by multiple Mode Couplings to few mould in transmitting terminal
In optical fiber, and pattern demultiplexer is needed also exist for by multiple Mode Decompositions in less fundamental mode optical fibre in receiving terminal.
Pattern multiplexer/demultiplexer is directly connected in less fundamental mode optical fibre as the Primary Component in mode multiplexing system
The quality of pattern transmission.Existing pattern multiplexer usually requires point three steps and carrys out work.
The first step, is that less fundamental mode optical fibre is directly fused with single-mode fiber, to excite the basic mode in less fundamental mode optical fibre, but both are straight
The junction loss for connecing welding is larger, and can also cause the crosstalk between pattern.
Second step, some high-order mode is converted to using multiple mode converters by the basic mode in less fundamental mode optical fibre respectively, but
It is that conversion efficiency reaches that 20 dB broadband mode conversion is more difficult, generally all there is remaining basic mode to the height after conversion
Rank is molded as the phenomenon of crosstalk.
3rd step, the Mode Coupling in many less fundamental mode optical fibres into a less fundamental mode optical fibre.Pattern demultiplexer is then anti-
Process works.
Therefore, all there is larger loss and crosstalk during existing pattern multiplexer/demultiplexer work, so as to influence letter
The transmission quality of breath.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of low-loss, the mould based on three core fibres of low crosstalk
Formula multiplexer, demultiplexer.
The object of the present invention is achieved like this：
A kind of pattern multiplexer/demultiplexer based on three core fibres, multiplexer includes main body, single-mode fiber I, single-mode fiber II
And less fundamental mode optical fibre, the single-mode fiber I and single-mode fiber II in one end of main body, less fundamental mode optical fibre main body the other end, it is described
Main body is with LPFG in three core fibres being made up of fibre core I, fibre core II, fibre core III and covering, fibre core III.
The fibre core I, the center of fibre core II are respectively the distance between with the center of fibre core IIIIt is equal, fibre core I, the center of fibre core II
The line with the center of fibre core III is mutually perpendicular to respectively.
The length of the main body is more than the length of LPFG.
The single-mode fiber I and single-mode fiber II are identical, fibre core and fibre core I and the fibre of single-mode fiber I and single-mode fiber II
The diameter of core II is all identical, is connected respectively with fibre core I and fibre core II, the fibre core of the less fundamental mode optical fibre and the diameter phase of fibre core III
Together, it is connected with fibre core III.
The cladding diameter of one end of the single-mode fiber I and single-mode fiber II and less fundamental mode optical fibre and main body connection is all than another
The cladding diameter at end is small, there is one section of transition region.
The fiber core refractive index of the single-mode fiber I and single-mode fiber II is identical with the refractive index of fibre core I, fibre core II, described
The fiber core refractive index of less fundamental mode optical fibre is identical with the refractive index of fibre core III, the single-mode fiber I and single-mode fiber II and less fundamental mode optical fibre
Cladding index it is identical with the refractive index of covering.
The fibre core I and fibre core II are identical fiber core with single-mold, i.e. fibre core I, the normalized frequency of fibre core II is respectivelyWith, meet, fibre core III is few mould fibre core, i.e. fibre core III（1.3）Normalized frequencyMeet。
The cycle of the LPFG meets, whereinFor the centre wavelength of grating,WithRespectively LP in fibre core I01LP in mould and fibre core III11The effective refractive index of mould；The LPFG
LengthIt is taken as LP in fibre core I01LP in mould and fibre core III11The coupling length of mould.
The single-mode fiber I and single-mode fiber II are connected one end cladding diameter with main body and are all, meet, it is few
Mode fiber is connected one end cladding diameter with main bodyMeet, whereinFor fibre core I and the diameter of fibre core II,For fibre
The diameter of core III.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention can be made using the relative position relation of two fiber core with single-mold and few mould fibre core of write-in LPFG
The LP of fibre core I, fibre core II01The LP of mould respectively with two degeneracys in fibre core III11Mould（LP11,aMould and LP11,bMould）Couple, then
Inputted and exported by the single-mode fiber and less fundamental mode optical fibre of matching, so that by inputting LP to two single-mode fibers01Mould is just
LP in less fundamental mode optical fibre can be achieved11,aMould and LP11,bThe mode multiplexing of mould, can also realize and input LP to less fundamental mode optical fibre11,aMould and
LP11,bMould resolves into the LP of two single-mode fibers01The pattern demultiplexing of mould.Present invention can apply to the mould based on less fundamental mode optical fibre
In division multiplexing system, with relatively low loss and crosstalk.
Brief description of the drawings
Fig. 1 is a kind of structural representation of pattern multiplexer/demultiplexer based on three core fibres of the present invention.
Fig. 2 isμm when, under no LPFG in main body the energy of three fibre core internal schemas with propagation distance
Graph of a relation.
Fig. 3 inputs LP for the present invention from fibre core I01Mould, in LPFG area the energy coupling of pattern with propagate away from
From graph of a relation.
Fig. 4 inputs LP for the present invention from fibre core II01Mould, in LPFG area the energy coupling of pattern with propagate away from
From graph of a relation.
Fig. 5 inputs LP for the present invention from fibre core I01Mould, the pattern point in LPFG area during different propagation distance
Butut,（a）Z=0,（b）Z=L/3,（c）Z=2L/3, and（d）Z=L.
Fig. 6 inputs LP for the present invention from fibre core II01Mould, the pattern point in LPFG area during different propagation distance
Butut,（a）Z=0,（b）Z=L/3,（c）Z=2L/3, and（d）Z=L.
Fig. 7 inputs LP for the present invention from fibre core I01Mould, in LPFG area, normalized output energy is with wavelength
Graph of a relation.
Fig. 8 inputs LP for the present invention from fibre core II01Mould, in LPFG area, normalized output energy is with wavelength
Graph of a relation.
Fig. 9 LP in LPFG area fibre core III for the present invention01Mould, LP21Mould and LP02The normalized output of mould
Energy with wavelength graph of a relation.
Wherein：Main body 1, fibre core I 1.1, fibre core II 1.2, fibre core III 1.3, covering 1.4, LPFG 1.5, list
Mode fiber I 2, single-mode fiber II 3, less fundamental mode optical fibre 4.
Embodiment
Referring to Fig. 1, a kind of pattern multiplexer/demultiplexer based on three core fibres of the present invention, the main body 1 of the multiplexer is
Three core fibres being made up of fibre core I 1.1, fibre core II 1.2, fibre core III 1.3 and covering 1.4, fibre core I 1.1, fibre core II 1.2 are two
Individual identical fiber core with single-mold, fibre core III 1.3 is few mould fibre core, fibre core I 1.1, the center of fibre core II 1.2 respectively with the center of fibre core III 1.3
Line be mutually perpendicular to, fibre core spacing（Fibre core I 1.1, the distance of the center of fibre core II 1.2 respectively with the center of fibre core III 1.3）Phase
Deng.One section long period optical fiber grating 1.5 is write in fibre core III 1.3, makes fibre core I 1.1, the LP of fibre core II 1.201Mould and fibre core III
LP in 1.311Mould meets LPFG phase-matching condition, and the cycle of LPFG 1.5 meets, whereinFor the centre wavelength of grating,WithRespectively LP in fibre core I 1.101Mould and fibre
LP in core III 1.311The effective refractive index of mould.Due to fibre core I 1.1 and the relative position relation of fibre core II 1.2 and fibre core III 1.3,
The LP of fibre core I 1.1, fibre core II 1.201Mould can be with two degeneracys in fibre core III 1.3 LP11Mould（LP11,aMould and LP11,bMould）Hair
Raw coupling, single-mode fiber I 2 and single-mode fiber II 3 that the connection of the one end of main body 1 is matched with fibre core I 1.1 and fibre core II 1.2, the other end
Connect the less fundamental mode optical fibre 4 matched with fibre core III 1.3.LP is inputted respectively from single-mode fiber I 2 and single-mode fiber II 301Mould is achieved that
LP is exported from less fundamental mode optical fibre 411,aMould and LP11,b, this is pattern multiplexer, and LP is inputted from less fundamental mode optical fibre 411,aMould and LP11,bMould can
Realization exports LP respectively from single-mode fiber I 2 and single-mode fiber II 301Mould, this is pattern demultiplexer.Pattern demultiplexer is mould
The reverse operation of formula multiplexer, coupling performance is identical, and the present invention is only illustrated to pattern multiplexer.
The fibre core spacing of main body 1Must be moderate, it is ensured that in the case where fibre core III 1.3 does not write LPFG,
Energy coupling will not occur between fibre core.Referring to Fig. 2, fibre core spacingμm when, the coupling energy of four patterns in fibre core III 1.3
Amount is in cyclically-varying, wherein LP all with transmission range21、LP02The coupling energy of mould is larger, but maximum coupling energy be smaller than-
20dB；The LP of fibre core II 1.201The coupling energy of mould has certain rising with transmission range, but in limited distance（50mm）
Couple energy still very weak（<-40dB）.Illustrate fibre core spacingμm, it disclosure satisfy that requirement.But nor fibre core spacingMore
It is big better, because fibre core spacingCrossing conference causes the coupling efficiency of pattern between fibre core to diminish, and the performance of device is influenceed, so that really
Determine fibre core spacingμm。
Referring to Fig. 3 ~ 4, respectively from fibre core I 1.1, the input of fibre core II 1.2 LP01Mould, in LPFG area（Fibre core III
That section of main body 1 of 1.3 write-in LPFGs 1.5）LP in fibre core I 1.1, fibre core II 1.201The energy of mould is reduced, fibre core
LP in III 1.311LP in fibre core I 1.1, fibre core II 1.2 after the energy increase of mould, transmission 50mm01Most energy of mould turn
The LP moved on in fibre core III 1.311The length of LPFG 1.5, i.e., be taken as by mouldmm.And for fibre core I
1.1st, fibre core II 1.2, therefrom fibre core input LP01There is no LP in mould, another fibre core01Mould is generated.This just illustrates from fibre
The LP that core I 1.1 is inputted01Mould is converted into the LP in fibre core III 1.311After mould, the LP in fibre core II 1.2 will not be converted into01Mould, from
Fibre core II 1.2 inputs LP01Mould equally will not also be converted into the LP in fibre core I 1.101Mould.So as to ensure that fibre core I 1.1, fibre core
Mode Coupling between II 1.2 and fibre core III 1.3 is separate, can be carried out simultaneously.
Referring to Fig. 5 ~ 6, respectively from fibre core I 1.1, the input of fibre core II 1.2 LP01Mould, in LPFG area, fibre core I
1.1st, the LP of fibre core II 1.201Mould is slowly shifted into fibre core III 1.3, is ultimately converted to the LP in fibre core III 1.311Mould.Can be with
See, the LP being finally converted into Fig. 7 and Fig. 811Mould differs 90 °, the LP of as two degeneracys11Mould, LP11,aAnd LP11,b.When point
Do not inputted from fibre core I 1.1, fibre core II 1.2The LP of polarization01Mould, fibre core I 1.1 is in the horizontal direction of fibre core III 1.3, fibre core II
1.2 are in the vertical direction of fibre core III 1.3, and the LP in fibre core III 1.3 is just excited respectively11,aMould and LP11,bMould.
Define LP in fibre core III 1.311The normalized output energy of mould is more than the work of -1dB wave-length coverage for the present invention
Bandwidth.Referring to Fig. 7 ~ 8, respectively from fibre core I 1.1, the input of fibre core II 1.2 LP01Mould, changes into LP in fibre core III 1.311,aMould and
LP11,bThe operating wavelength range of mould is respectively 1538 ~ 1563nm and 1540 ~ 1565nm, then operating wavelength range of the invention is
1540 ~ 1563nm, bandwidth of operation is 23nm.
Referring to Fig. 9, in operating wavelength range, LP in fibre core III 1.301、LP21And LP02The output energy difference of mould is small
In -34.8, -22.3 and -23.4dB, compared to LP in fibre core III 1.311,aMould, all to when young -21dB.So that it is guaranteed that fibre core III
LP in 1.311,aMould is not by the crosstalk of other patterns.It can so say, LP in fibre core III 1.311,aMould and LP11,bMould can be realized low
Crosstalk transfer, is output in less fundamental mode optical fibre 4 and can be achieved to LP11,aMould and LP11,bMould high-quality is multiplexed.
Below in conjunction with brief description of the drawings the preferred embodiments of the present invention.
Embodiment one：
It is fibre core I 1.1, fibre core II 1.2, the refractive index of fibre core III 1.3 and single-mode fiber I 2 and single-mode fiber II 3, few referring to Fig. 1
The fiber core refractive index of mode fiber 4 is all 1.455, refractive index and single-mode fiber I 2 and single-mode fiber II 3, the less fundamental mode optical fibre 4 of covering 4
Cladding index all be 1.45；The fibre core of fibre core I 1.1, the diameter of fibre core II 1.2 and single-mode fiber I 2 and single-mode fiber II 3
Diameter is all 8.2 μm, and the diameter of fibre core III 1.3 and the core diameter of less fundamental mode optical fibre 4 are all 20 μm, single-mode fiber I 2 and single-mode optics
The cladding diameter that fibre II 3 is connected one end with fibre core I 1.1, fibre core II 1.2 is 20 μm, and less fundamental mode optical fibre 4 is connected one with fibre core III 1.3
The cladding diameter at end is 35 μm；The distance at the center of fibre core I 1.1, the center of fibre core II 1.2 and fibre core III 1.3 is all 24 μm；It is long
The cycle of period optical fiber grating 1.5 is 1760 μm, and modulation depth is 0.002, and length is 50mm.The single-mode optics of slave pattern multiplexer
Fibre I 2 and single-mode fiber II 3 input LP simultaneously01Mould, the output of less fundamental mode optical fibre 4 LP of slave pattern multiplexer11,aMould and LP11,bMould, returns
One, which changes output energy, is more than -1dB wave-length coverage for 1540 ~ 1563nm, and the bandwidth of operation of pattern multiplexer is 23nm, fibre core III
The pattern of other in 1.3 all compares LP11Mould is to when young -21dB.
In addition：It should be noted that above-mentioned embodiment is only a prioritization scheme of this patent, the skill of this area
Any change or improvement that art personnel are done according to above-mentioned design, within the protection domain of this patent.
Claims (9)
1. a kind of pattern multiplexer/demultiplexer based on three core fibres, it is characterised in that：Multiplexer includes main body（1）, single mode
Optical fiber I（2）, single-mode fiber II（3）And less fundamental mode optical fibre（4）, the single-mode fiber I（2）With single-mode fiber II（3）In main body（1）
One end, less fundamental mode optical fibre（4）In main body（1）The other end, the main body（1）It is by fibre core I（1.1）, fibre core II（1.2）, it is fine
Core III（1.3）And covering（1.4）Three core fibres constituted, fibre core III（1.3）In with LPFG（1.5）.
2. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The fibre
Core I（1.1）, fibre core II（1.2）Center respectively with fibre core III（1.3）The distance between centerIt is equal, fibre core I（1.1）, fibre core
Ⅱ（1.2）Center respectively with fibre core III（1.3）The line at center is mutually perpendicular to.
3. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The master
Body（1）Length be more than LPFG（1.5）Length.
4. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The list
Mode fiber I（2）With single-mode fiber II（3）It is identical, single-mode fiber I（2）With single-mode fiber II（3）Fibre core and fibre core I（1.1）With
Fibre core II（1.2）Diameter it is all identical, respectively with fibre core I（1.1）With fibre core II（1.2）Connection, the less fundamental mode optical fibre（4）Fibre
Core and fibre core III（1.3）Diameter it is identical, with fibre core III（1.3）Connection.
5. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The list
Mode fiber I（2）With single-mode fiber II（3）And less fundamental mode optical fibre（4）With main body（1）The covering of one end of connection（1.4）Diameter all compares
The covering of the other end（1.4）Diameter is small, there is one section of transition region.
6. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The list
Mode fiber I（2）With single-mode fiber II（3）Fiber core refractive index and fibre core I（1.1）, fibre core II（1.2）Refractive index it is identical, institute
State less fundamental mode optical fibre（4）Fiber core refractive index and fibre core III（1.3）Refractive index it is identical, the single-mode fiber I（2）And single-mode fiber
Ⅱ（3）And less fundamental mode optical fibre（4）Cladding index and covering（1.4）Refractive index it is identical.
7. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The fibre
Core I（1.1）With fibre core II（1.2）For identical fiber core with single-mold, i.e. fibre core I（1.1）, fibre core II（1.2）Normalized frequency point
It is notWith, meet, fibre core III（1.3）For few mould fibre core, i.e. fibre core III（1.3）Normalization frequency
RateMeet。
8. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The length
Period optical fiber grating（1.5）Cycle meet, whereinFor the centre wavelength of grating,WithRespectively fibre core I（1.1）Middle LP01Mould and fibre core III（1.3）Middle LP11The effective refractive index of mould；The long week
Phase fiber grating（1.5）LengthIt is taken as fibre core I（1.1）Middle LP01Mould and fibre core III（1.3）Middle LP11The coupling length of mould.
9. a kind of pattern multiplexer/demultiplexer based on three core fibres as claimed in claim 1, it is characterised in that：The list
Mode fiber I（2）With single-mode fiber II（3）With main body（1）Connecting one end cladding diameter is all, meet, it is few
Mode fiber（4）With main body（1）Connect one end cladding diameterMeet, whereinFor fibre core I（1.1）And fibre
Core II（1.2）Diameter,For fibre core III（1.3）Diameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710690030.3A CN107272115B (en) | 2017-08-14 | 2017-08-14 | Mode multiplexer/demultiplexer based on three-core optical fiber |
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|---|---|---|---|
| CN201710690030.3A CN107272115B (en) | 2017-08-14 | 2017-08-14 | Mode multiplexer/demultiplexer based on three-core optical fiber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942443A (en) * | 2018-01-03 | 2018-04-20 | 聊城大学 | A kind of three pattern mode division multiplexing device of low-loss low crosstalk graded--index planar waveguides |
| CN108363142A (en) * | 2017-08-03 | 2018-08-03 | 江苏大学 | A kind of Rectangle Waveguide Mode switching device |
| CN108627921A (en) * | 2018-05-07 | 2018-10-09 | 北京大学 | A kind of less fundamental mode optical fibre degenerate mode group demultiplexer and preparation method thereof based on fused biconical taper |
| CN110596817A (en) * | 2019-09-07 | 2019-12-20 | 聊城大学 | Three-mode division multiplexer with high extinction ratio |
| CN111796359A (en) * | 2020-07-31 | 2020-10-20 | 燕山大学 | Double-core optical fiber mode converter |
| CN112612083A (en) * | 2020-12-31 | 2021-04-06 | 武汉邮电科学研究院有限公司 | Optical fiber mode multiplexing and demultiplexing device and method |
| CN114303327A (en) * | 2019-06-28 | 2022-04-08 | 信息技术有限公司 | Optical fiber measurement system, method for adapting a communication optical fiber into a measurement system, and optical fiber measurement and communication system |
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| CN207148361U (en) * | 2017-08-14 | 2018-03-27 | 江苏法尔胜光电科技有限公司 | A kind of pattern multiplexer/demultiplexer based on three core fibres |
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| JP2000171663A (en) * | 1998-10-22 | 2000-06-23 | Thomas & Betts Corp <T&B> | Clad mode coupler, add/drop filter formed by bragg fiber grating and multiplexer |
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| CN207148361U (en) * | 2017-08-14 | 2018-03-27 | 江苏法尔胜光电科技有限公司 | A kind of pattern multiplexer/demultiplexer based on three core fibres |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363142A (en) * | 2017-08-03 | 2018-08-03 | 江苏大学 | A kind of Rectangle Waveguide Mode switching device |
| CN108363142B (en) * | 2017-08-03 | 2020-09-25 | 江苏大学 | Rectangular waveguide mode conversion device |
| CN107942443A (en) * | 2018-01-03 | 2018-04-20 | 聊城大学 | A kind of three pattern mode division multiplexing device of low-loss low crosstalk graded--index planar waveguides |
| CN108627921A (en) * | 2018-05-07 | 2018-10-09 | 北京大学 | A kind of less fundamental mode optical fibre degenerate mode group demultiplexer and preparation method thereof based on fused biconical taper |
| CN114303327A (en) * | 2019-06-28 | 2022-04-08 | 信息技术有限公司 | Optical fiber measurement system, method for adapting a communication optical fiber into a measurement system, and optical fiber measurement and communication system |
| CN110596817A (en) * | 2019-09-07 | 2019-12-20 | 聊城大学 | Three-mode division multiplexer with high extinction ratio |
| CN110596817B (en) * | 2019-09-07 | 2022-07-15 | 聊城大学 | Three-mode division multiplexer with high extinction ratio |
| CN111796359A (en) * | 2020-07-31 | 2020-10-20 | 燕山大学 | Double-core optical fiber mode converter |
| CN112612083A (en) * | 2020-12-31 | 2021-04-06 | 武汉邮电科学研究院有限公司 | Optical fiber mode multiplexing and demultiplexing device and method |
| CN112612083B (en) * | 2020-12-31 | 2022-07-01 | 武汉邮电科学研究院有限公司 | Optical fiber mode multiplexing and demultiplexing device and method |
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