CN108152879A - A kind of controllable multi-core optical fiber of crosstalk - Google Patents
A kind of controllable multi-core optical fiber of crosstalk Download PDFInfo
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- CN108152879A CN108152879A CN201711326198.2A CN201711326198A CN108152879A CN 108152879 A CN108152879 A CN 108152879A CN 201711326198 A CN201711326198 A CN 201711326198A CN 108152879 A CN108152879 A CN 108152879A
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02042—Multicore optical fibres
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Abstract
The invention discloses a kind of controllable multi-core optical fibers of crosstalk, including multiple fiber core parts, share cladding part and coating portion, which is characterized in that the fiber core part includes pump light fibre core and Transmission Fibers core；The diameter of the pump light fibre core is more than the diameter of the Transmission Fibers core；The position distribution of the pump light fibre core and the Transmission Fibers core is asymmetric；The Transmission Fibers core includes at least two Transmission Fibers cores；The crosstalk of the multi-core optical fiber can linear regulation.The multi-core optical fiber of the present invention is by controlling the incident optical power in pump light fibre core, tunable light wave coupling is generated between fibre core, so that the multi-core optical fiber has the controllable characteristic of crosstalk, the coupling between fiber core can be varied and controlled, significantly reduce the limitation apart from allowable error between the core diameter of fiber cores and adjacent fibre core.The multi-core optical fiber of the present invention is suitable for preparing the novel optical fiber sensor national defence, industrial production and civil field.
Description
Technical field
The present invention relates to optical sensing technology field, a kind of particularly controllable multi-core optical fiber of crosstalk.
Background technology
The concept of multi-core mono-mode fiber is to be proposed by France Telecom in 1994, and France Telecom sets with Alcatel
Count and develop four core single mode optical fibers.2010 on ECOC Eeuropean Conference on Optical Communications, based on multi-core optical fiber and less fundamental mode optical fibre
Space division multiplexing technology (SDM) obtains the approval of Liao Zhong mechanisms scientific research scholar, quilt as the key technology for promoting optical fiber telecommunications system
It is regarded as the second technical revolution of the optical fiber transmission technique after wavelength-division multiplex technique.According to retrieval, in the time of a few years
In carried out multiple batches of low-loss, the design of low crosstalk multi-core optical fiber, drawing and test in the world, made a variety of low-losses
The multiplexing demultiplexing device of low crosstalk, and repeatedly in U.S.'s optical-fibre communications exhibition and seminar (OFC), ECOC Eeuropean Conference on Optical Communications
(ECOC) etc. corresponding transmission experiment is reported in international conferences.
According to the degree close to each other of fibre core multigroup in multi-core optical fiber, there are two kinds of functions in multi-core optical fiber development.
Multigroup core interval is larger, and core centre distance is more than 30.0 μm, i.e., does not generate the structure of optical coupling effect.This is more
Core fibre can significantly improve the integration density of the unit area of transmission line.Such as to fly optical fiber cable share limited for the length in China
Company, by with Central China University of Science and Technology's optic communication and optical-fiber network engineering research team unity, take the lead in having drawn homogeneity type at home
Seven core single mode optical fiber of weak coupling.By being composed to optical fiber attenuation, cutoff wavelength, bending loss, crosstalk, dispersion, polarization mode dispersion etc.
Technique is continued to optimize in the test of performance parameter, finally realizes low crosstalk, low-loss seven core fibre.This multi-core optical fiber exists
1550nm is attenuation 0.20dB/km or so, and crosstalk is less than -40dB/100km, has filled up the country in the special optical fiber field
Technological gap approaches in properties of product with numerous optical fiber manufacturers such as OFS leading in the world, healthy and free from worry, Teng Cang.
Multigroup core interval is smaller, and core centre distance is less than 30.0 μm, that is, generates the structure of optical coupling effect.Utilize this
Principle industry is developing the sensor of double-fiber core or light circuit device.But in existing multi-core optical fiber designing scheme, once it sets
It counts into, the coupling between fiber core will be unable to change and control.This greatly limits the novel light using multi-core optical fiber
Fiber sensor system, especially those needs introduce controllable crosstalk on different light transmission paths, including variations such as amplitude, phases
Systematic difference, such as optical-electronic oscillator, microwave photon filter, optical delay line.Current existing multi-core optical fiber design side
Case, the integration density of most of unit areas for being dedicated to improving transmission line, different designing schemes have corresponded to optical fiber attenuation
The optimization of the parameters such as spectrum, cutoff wavelength, bending loss, crosstalk, dispersion, polarization mode dispersion, and it is even more less in numerous schemes
It is related to the multi-core optical fiber design of crosstalk controllability.Therefore, it is necessary to propose a kind of controllable multi-core optical fiber of new crosstalk.
Invention content
To solve the above-mentioned problems, the present invention propose a kind of controllable multi-core optical fiber of crosstalk, including multiple fiber core parts,
Share cladding part and coating portion, the fiber core part includes pump light fibre core and Transmission Fibers core, the pump light fibre core it is straight
Diameter is more than the diameter of the Transmission Fibers core；The position distribution of the pump light fibre core and the Transmission Fibers core is asymmetric；Institute
It states Transmission Fibers core and includes at least two Transmission Fibers cores；The crosstalk of the multi-core optical fiber can linear regulation.
Preferably, the diameter of the pump light fibre core is in the range of 20.0~25.0 μm.
Preferably, the Transmission Fibers core includes the first Transmission Fibers core and the second Transmission Fibers core, first transmission
Fiber cores and the centre distance of the pump light fibre core are less than the center of the second Transmission Fibers core and the pump light fibre core
Distance.
Preferably, the diameter of the Transmission Fibers core is in the range of 8.0~10.0 μm.
Preferably, model of the centre distance of the first Transmission Fibers core and the pump light fibre core at 38.0~65.0 μm
In enclosing.
Preferably, range of the centre distance of the second Transmission Fibers core and the pump light fibre core at 68.0~95 μm
It is interior.
Preferably, the centre distance of the first Transmission Fibers core and the second Transmission Fibers core is at 68.0~95 μm
In the range of.
Preferably, the incident power of the pump light fibre core and the crossfire value of the first Transmission Fibers core meet as offline
Sexual intercourse formula：
C=a × P-b,
Wherein, C represents the crossfire value of the first Transmission Fibers core, unit dBm；P represents the incident power of pump light fibre core,
Unit is dBm；A is that 0.69~0.79, b is 35~40.
Preferably, the pump light fibre core is used for transmission high power pumping light energy, and the Transmission Fibers core is used for transmission
Optic communication signal.
Preferably, the pump light fibre core and the Transmission Fibers core include fibre core and covering.
Beneficial effects of the present invention：
The present invention proposes a kind of incident optical power of the controllable multi-core optical fiber of crosstalk by controlling in pump light fibre core, can
The light wave coupling generated between fibre core is varied and controlled so that the multi-core optical fiber has the controllable characteristic of crosstalk；Greatly
Reduce the limitation apart from allowable error between the core diameter of fiber cores and adjacent fibre core.
Description of the drawings
Fig. 1 is the schematic cross-section of the controllable multi-core optical fiber of the crosstalk of the present invention.
Fig. 2 is the diameter dimension mark figure of various fiber cores in the controllable multi-core optical fiber of the crosstalk of the present invention, wherein, multicore
Fibre diameter D1, pumping optical fiber core diameter D2, Transmission Fibers core diameter D3.
Fig. 3 is the centre distance mark figure between various fiber cores in the controllable multi-core optical fiber of real crosstalk of the invention,
In, distance is L1 between pump light fibre core and the first Transmission Fibers core；Distance is L2 between pump light fibre core and the second Transmission Fibers core；
Centre distance between two Transmission Fibers cores of first Transmission Fibers core and the second Transmission Fibers core is L3.
Fig. 4 is the correspondence figure of crosstalk in incident optical power and Transmission Fibers core in the pump light fibre core of the present invention,
Wherein " triangle " represents the crosstalk in the first Transmission Fibers core nearer apart from pump light fibre core, and solid line represents that its fitting is bent
Line；" circle " represents the crosstalk in pump light fibre core the second Transmission Fibers core farther out, and dotted line represents its matched curve.
Specific embodiment
The present invention is described in further detail below by specific embodiment combination attached drawing.The application can be with a variety of
Different forms is realized, however it is not limited to the present embodiment described embodiment.The purpose of detailed description below is provided
It is easy for becoming apparent from present disclosure thorough explanation, the words of the wherein indicating positions such as upper and lower, left and right is only directed to
Shown structure is in respective figure for position.
Embodiment 1
Referring to figs. 1 to Fig. 4, the present invention proposes a kind of controllable multi-core optical fiber of crosstalk, which includes multiple fibres
Core shares cladding part 1 and coating portion, wherein, fiber core part includes the different pump light fibre core 2 of size and Transmission Fibers core,
Pump light fibre core 2 is used for transmission high power pumping light energy, and Transmission Fibers core is used for transmission optic communication signal；Pump light fibre core 2
Include fibre core and covering, and extend each along the central axis of multi-core optical fiber with Transmission Fibers core；In pump light fibre core 2 and pass
It loses fibre core to be spaced in the state of separation, shares cladding part and fiber core part is integrally held within portion.
Specifically, multi-core optical fiber of the invention includes pump light fibre core 2 and Transmission Fibers core, wherein, two kinds of fiber cores
Core diameter is different, and the position arranged distribution of two kinds of fiber cores is asymmetric, roughly triangular；The diameter of pump light fibre core 2
D2 is in the range of 20.0~25.0 μm, and the diameter D3 of Transmission Fibers core is in the range of 8.0~10.0 μm；Transmission Fibers core packet
Include at least two.
Transmission Fibers core includes the first Transmission Fibers core 3 and the second Transmission Fibers core 4, the first Transmission Fibers core 3 to the second
Transmission Fibers core 4 is close to pump light fibre core 2, further, the centre distance L1 of the first Transmission Fibers core 3 and pump light fibre core 2
In 38.0~65.0 μ ms；The centre distance L2 of second Transmission Fibers core 4 and pump light fibre core 2 is at 68.0~95.0 μm
In the range of；The centre distance L3 of first Transmission Fibers core 3 and the second Transmission Fibers core 4 is in 68.0~95.0 μ ms.
In the present embodiment, the diameter D1 of the multi-core optical fiber is preferably 125.0 μm, wherein, the diameter of pump light fibre core 2
It is 20.0 μm；The diameter of first Transmission Fibers core 3 and the second Transmission Fibers core 4 is equal and is 8.0 μm；It is pumped in the multi-core optical fiber
The distance between centers L1 of 2 and first Transmission Fibers core 3 of fiber cores is 38.0 μm；2 and second Transmission Fibers core 4 of pump light fibre core
Center spacing L2 is 78.0 μm；The centre distance L3 of first Transmission Fibers core 3 and the second Transmission Fibers core 4 is 78.0 μm.
For the incident optical power being verified in control pump light fibre core, multi-core optical fiber of the invention can generate adjustable
Humorous light wave coupling and the characteristic for having crosstalk controllable, have carried out following experiment.
Prepare multi-core optical fiber A, multi-core optical fiber B, multi-core optical fiber C, multi-core optical fiber D, multi-core optical fiber E, multi-core optical fiber F, multicore
Optical fiber G (specific size such as following table, wherein, the diameter D1 of multi-core optical fiber is 125.0 μm), it is exported by adjusting pump laser
Power is stepped up incident optical power in pump light fibre core by 0 to 35dBm, measures the crosstalk numerical value of each Transmission Fibers core.
It is obtained through measuring, range -40dB/ has been obtained in the first Transmission Fibers core nearer apart from pump light fibre core
The crosstalk of 100km~-12dB/100km, and approximation changes linearly, and in the second transmission light apart from pump light fibre core farther out
In fibre core, crosstalk maintains -40dB/100km or so without significant change.Referring specifically to Fig. 4.
It is obtained according to measured value, the incident power of pump light fibre core and the crossfire value satisfaction of the first Transmission Fibers core are as follows
Linear relation：
C=a × P-b,
Wherein, C represents the crossfire value of the first Transmission Fibers core, unit dBm；P represents the incident power of pump light fibre core,
Unit is dBm；A is that 0.69~0.79, b is 35~40.
It follows that the crosstalk difference of the first Transmission Fibers core and the second Transmission Fibers core can be by changing pumping optical fiber
Incident optical power in core carries out Linear Tuning.Therefore, multi-core optical fiber of the invention can generate tunable light wave coupling and make
With and with the controllable characteristic of crosstalk.
It should be noted that the multi-core optical fiber of the present invention is suitable for preparing national defence, industrial production and civil field
Novel optical fiber sensor, especially those needs introduce controllable crosstalk on different light transmission paths, including changes such as amplitude, phases
The systematic difference of change, such as optical-electronic oscillator, microwave photon filter, optical delay line.
The above, the preferable specific embodiment of patent only of the present invention, but the protection domain of patent of the present invention is not
This is confined to, any one skilled in the art can readily occur in the technical scope of patent diselosesll of the present invention
Change or replacement, should all cover within the protection domain of patent of the present invention.
Claims (10)
1. a kind of multi-core optical fiber including multiple fiber core parts, shares cladding part and coating portion, which is characterized in that the fibre core
Portion includes pump light fibre core and Transmission Fibers core, and the diameter of the pump light fibre core is more than the diameter of the Transmission Fibers core；Institute
It states pump light fibre core and the position distribution of the Transmission Fibers core is asymmetric；The Transmission Fibers core includes at least two transmission light
Fibre core；The crosstalk of the multi-core optical fiber can linear regulation.
2. multi-core optical fiber according to claim 1, which is characterized in that the diameter of the pump light fibre core is 20.0~25.0
In the range of μm.
3. multi-core optical fiber according to claim 1, which is characterized in that the Transmission Fibers core includes the first Transmission Fibers core
With the second Transmission Fibers core, the centre distance of the first Transmission Fibers core and the pump light fibre core is less than the described second transmission
Fiber cores and the centre distance of the pump light fibre core.
4. multi-core optical fiber according to claim 2, which is characterized in that the diameter of the Transmission Fibers core is in 8.0~10.0 μ
In the range of m.
5. multi-core optical fiber according to claim 2, which is characterized in that the first Transmission Fibers core and the pumping optical fiber
The centre distance of core is in the range of 38.0~65.0 μm.
6. multi-core optical fiber according to claim 2, which is characterized in that the second Transmission Fibers core and the pumping optical fiber
The centre distance of core is in the range of 68.0~95 μm.
7. multi-core optical fiber according to claim 2, which is characterized in that the first Transmission Fibers core and the described second transmission
The centre distance of fiber cores is in the range of 68.0~95 μm.
8. multi-core optical fiber according to claim 2, which is characterized in that the incident power of the pump light fibre core and described the
The crossfire value of one Transmission Fibers core meets following linear relation：
C=a × P-b,
Wherein, C represents the crossfire value of the first Transmission Fibers core, unit dBm；P represents the incident power of pump light fibre core, unit
For dBm；A is that 0.69~0.79, b is 35~40.
9. multi-core optical fiber according to claim 1, which is characterized in that the pump light fibre core is used for transmission high power pumping
Light energy, the Transmission Fibers core are used for transmission optic communication signal.
10. multi-core optical fiber according to claim 1, which is characterized in that the pump light fibre core and the Transmission Fibers core
Include fibre core and covering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711326198.2A CN108152879B (en) | 2017-12-12 | 2017-12-12 | kinds of multicore optical fiber with controllable crosstalk |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711326198.2A CN108152879B (en) | 2017-12-12 | 2017-12-12 | kinds of multicore optical fiber with controllable crosstalk |
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| CN108152879B CN108152879B (en) | 2020-01-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108957626A (en) * | 2018-06-19 | 2018-12-07 | 全球能源互联网研究院有限公司 | A kind of reaction type energy-transmission optic fibre and optical fiber energy transfer system, device |
| CN113660039A (en) * | 2021-08-17 | 2021-11-16 | 广东工业大学 | Programmable controlled multi-dimensional multiplexing microwave photon filter and filtering method thereof |
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| CN202693840U (en) * | 2011-07-11 | 2013-01-23 | 日立电线株式会社 | Multi-core optical fiber |
| US20140178018A1 (en) * | 2012-12-25 | 2014-06-26 | Fujikura Ltd. | Multicore fiber |
| US8811787B2 (en) * | 2011-11-30 | 2014-08-19 | At&T Intellectual Property I, L.P. | Multicore optical fiber with reduced inter-core crosstalk |
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| CN102484536A (en) * | 2009-06-26 | 2012-05-30 | 阿尔卡特朗讯 | Transverse-mode Multiplexing For Optical Communication Systems |
| CN101876774A (en) * | 2009-11-27 | 2010-11-03 | 北京交通大学 | Large-power multiband multi-core optical fiber amplifier |
| CN202693840U (en) * | 2011-07-11 | 2013-01-23 | 日立电线株式会社 | Multi-core optical fiber |
| US8811787B2 (en) * | 2011-11-30 | 2014-08-19 | At&T Intellectual Property I, L.P. | Multicore optical fiber with reduced inter-core crosstalk |
| US20140178018A1 (en) * | 2012-12-25 | 2014-06-26 | Fujikura Ltd. | Multicore fiber |
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| CN108957626A (en) * | 2018-06-19 | 2018-12-07 | 全球能源互联网研究院有限公司 | A kind of reaction type energy-transmission optic fibre and optical fiber energy transfer system, device |
| CN108957626B (en) * | 2018-06-19 | 2020-09-08 | 全球能源互联网研究院有限公司 | Feedback energy transmission optical fiber and optical fiber energy transmission system and device |
| CN113660039A (en) * | 2021-08-17 | 2021-11-16 | 广东工业大学 | Programmable controlled multi-dimensional multiplexing microwave photon filter and filtering method thereof |
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