CN106125197A - A kind of magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber - Google Patents
A kind of magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber Download PDFInfo
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- CN106125197A CN106125197A CN201610718815.2A CN201610718815A CN106125197A CN 106125197 A CN106125197 A CN 106125197A CN 201610718815 A CN201610718815 A CN 201610718815A CN 106125197 A CN106125197 A CN 106125197A
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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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/1225—Basic optical elements, e.g. light-guiding paths comprising photonic band-gap structures or photonic lattices
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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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/126—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind using polarisation effects
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Abstract
The invention discloses a kind of magnetic fluid and fill the tunable polarization beam apparatus of double-core photonic crystal fiber, belong to special optical fiber, fiber optic communication, signal processing field.This polarization beam apparatus is based on double-core photonic crystal fiber structure.Double-core photonic crystal fiber includes pure quartz substrate (1), two identical fuses (2) and the airport of periodic arrangement, and the airport (3) of the upper and lower both sides of fuse, the airport (4) of the fuse left and right sides and the radius away from the airport (5) of fuse are different.Wherein, in the airport (6) of fuse, it is filled with magnetic fluid at double-core photonic crystal fiber.This polarization beam apparatus uses single channel output.The refractive index of magnetic fluid is with external magnetic field Strength Changes, and when the external world is without magnetic field, a certain unidirectional polarized light is exported by the outfan of double-core photonic crystal fiber, and another polarized light does not exports.When the external world applies certain magnetic field, the change of magnetic fluid refractive index, cause the change of two polarized light coupling lengths, thus the energy of outfan polarized light diminishes, and the energy quantitative change of another polarized light is big.During a certain magnetic field intensity, the outfan polarization mode at double-core photonic crystal fiber changes, thus has reached the tunable of polarization mode.
Description
Technical field
The present invention relates to a kind of magnetic fluid and filled the tunable polarization beam apparatus of double-core photonic crystal fiber, belonged to extraordinary
Optical fiber, fiber optic communication, signal processing field.
Background technology
A branch of incident illumination can be split into two orthogonal polarisation state light beams by polarization beam apparatus, and transmits in different directions,
It it is a kind of important devices in optical-fiber network.Polarization beam apparatus is wide in field application such as fiber optic communication, Fibre Optical Sensor, Photoelectric Detection
General.
In recent years, the design of polarization beam apparatus is based primarily upon Evolution Modes, directional couple, multiple-mode interfence, Mach increasing Dare
The principles such as interference.Wherein, equipment based on Evolution Modes principle has that volume is little, extinction ratio advantages of higher, but this equipment is main
Making on silica-based, manufacture difficulty is of a relatively high.Therefore, polarization beam apparatus based on glass material and optical fiber structure is by greatly
Quantity research.But, owing to the birefringence of glass material is less so that device size is greatly increased.Photonic crystal fiber is by the cycle
Property arrangement airport and pure quartz substrate constitute, due to the high birefringence that it is natural, photonic crystal fiber is polarization beam apparatus
Provide good device basis.
At present photonic crystal fiber polarization beam apparatus be based primarily upon single photonic crystal fiber, double-core photonic crystal fiber and
The structures such as three core photonic crystal fibers.The main operational principle of polarization beam apparatus based on single photonic crystals optical fiber structure is,
At the inwall coating metal of the airport near fuse, and thus cause surface plasma resonance (SPR) effect.SPR effect
Cause two polarized light loss differences, higher polarized light is lost and is filtered.But at single photonic crystal fiber polarization beam apparatus
Outfan, can only obtain the polarization state of fixed-direction.Polarization beam apparatus based on twin-core and three core photonic crystal fibers is mainly adopted
By coupling mode equations, it is studied.When a fuse injects light from which, due to Mode Coupling effect, incident fuse
Optically coupling in another fuse, its energy is the distribution of cycle sinusoidal formula, when transmission range is equal to coupling length, and the energy in fuse
Amount reaches maximum.Due to birefringent existence, the polarized light coupling length of both direction is different, reaches certain in transmission range certain
During value, the polarized light in two directions is separated, it is achieved polarization beam splitting.Studied at present based on twin-core, three core photonic crystals
The polarization beam splitter structure of optical fiber uses the dual pathways to export mostly.Dual pathways output need to introduce fiber optic splitter, and employing connects entirely
Enter technology to access fiber optic splitter based on twin-core or the polarization beam apparatus of three core photonic crystal fibers.But connecing of fiber optic splitter
Enter process complicated, and loss is bigger.
Summary of the invention
Problem to be solved by this invention is, overcome current single photonic crystal fiber single polarization output and twin-core,
Three core photonic crystal fiber dual pathways export structures connect complicated and loss this problem big.A kind of magnetic fluid is provided to fill twin-core
The tunable polarization beam apparatus of photonic crystal fiber.
Technical scheme:
A kind of magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber, and this beam splitter is based on twin-core photon
Crystal optical fibre structure.Double-core photonic crystal fiber includes pure quartz substrate, two identical fuses and the airport of periodic arrangement,
And the airport of the upper and lower both sides of fuse, the airport of the fuse left and right sides and each not phase of radius away from the airport of fuse
With.Wherein, in the airport of fuse, magnetic fluid it is filled with at double-core photonic crystal fiber.
When filling the adjustable magnetic fluid of refractive index in the airport of fibre core, by adjusting magnetic field intensity, reach inclined
Polarization state tunable.Initially without the state in magnetic field, double-core photonic crystal fiber exports the single polarization of a certain polarization direction.When
When applying magnetic field, the external world, the change of magnetic fluid refractive index causes the effective refractive index of polarization mode to change, causes two
The coupling length of polarization direction changes, thus the single polarization energy exported reduces, and another polarized light energy increases.At certain
Under one specific magnetic field intensity, the polarized light energy of original state output is preferably minimized, and the polarized light energy of other direction reaches
To maximum, now achieve the conversion of polarization mode at outfan.
Beneficial effects of the present invention is specific as follows:
This structure is based primarily upon the character of double-core photonic crystal fiber and magnetic fluid, and the outfan at polarization beam apparatus realizes
The conversion of polarization mode is tunable.This polarization beam splitter structure is simple, flexible design, junction loss are little and are prone to and optic communication
The system integration.
Accompanying drawing explanation
Fig. 1 is the cross sectional representation that magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber.
When Fig. 2 is initially without magnetic field, outfan two polarized light energy is with the variation diagram of transmission range.
Fig. 3 is the two polarized light coupling distances change schematic diagrams with applied field strengths.
When Fig. 4 is polarization beam apparatus a length of 3.035mm, outfan two polarized light energy is with the change of applied field strengths
Schematic diagram.
When Fig. 5 is polarization beam apparatus a length of 8.430mm, outfan two polarized light energy is with the change of applied field strengths
Schematic diagram.
Detailed description of the invention
1 to the 5 tunable polarization beam apparatus work to a kind of magnetic fluid filling double-core photonic crystal fiber below in conjunction with the accompanying drawings
Further describe.
Embodiment one
A kind of magnetic fluid fills the cross section of the tunable polarization beam apparatus of double-core photonic crystal fiber as it is shown in figure 1, be somebody's turn to do
Beam splitter is based on double-core photonic crystal fiber structure.Double-core photonic crystal fiber includes 1, two identical fuses of pure quartz substrate
2 and the airport of periodic arrangement, and the airport 3 of the upper and lower both sides of fuse, the airport 4 of the fuse left and right sides and away from fuse
The radius of airport 5 different.Wherein, in the airport 6 of fuse, it is filled with magnetic current at double-core photonic crystal fiber
Body.
In the present embodiment, magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber, initial without magnetic field
Time, outfan two polarized light energy with transmission range variation diagram as shown in Figure 2.It is 3.035mm, 8.430mm in transmission range
Time, at outfan, X polarized light energy 7 reaches maximum, and Y polarized light energy 8 minimizes, it is achieved that single polarization output.
Embodiment two
A kind of magnetic fluid fills the cross section of the tunable polarization beam apparatus of double-core photonic crystal fiber as it is shown in figure 1, be somebody's turn to do
Beam splitter is based on double-core photonic crystal fiber structure.Double-core photonic crystal fiber includes 1, two identical fuses of pure quartz substrate
2 and the airport of periodic arrangement, and the airport 3 of the upper and lower both sides of fuse, the airport 4 of the fuse left and right sides and away from fuse
The radius of airport 5 different.Wherein, in the airport 6 of fuse, it is filled with magnetic current at double-core photonic crystal fiber
Body.
In embodiment magnetic fluid fill double-core photonic crystal fiber tunable polarization beam apparatus, the refractive index of magnetic fluid with
The extraneous intensity applying magnetic field changes.When external magnetic field changes, the change of magnetic fluid refractive index causes polarization mode effectively to roll over
Penetrate the change of rate, thus two polarized light coupling distances change with applied field strengths.Two polarized light coupling distances are with externally-applied magnetic field
The change schematic diagram of intensity is as it is shown on figure 3, the coupling distance of X polarized light 9 and Y polarized light 10 all reduces with magnetic field intensity.
Embodiment three
A kind of magnetic fluid fills the cross section of the tunable polarization beam apparatus of double-core photonic crystal fiber as it is shown in figure 1, be somebody's turn to do
Beam splitter is based on double-core photonic crystal fiber structure.Double-core photonic crystal fiber includes 1, two identical fuses of pure quartz substrate
2 and the airport of periodic arrangement, and the airport 3 of the upper and lower both sides of fuse, the airport 4 of the fuse left and right sides and away from fuse
The radius of airport 5 different.Wherein, in the airport 6 of fuse, it is filled with magnetic current at double-core photonic crystal fiber
Body.
In embodiment, magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber, two polarized light coupling distances
Change cause the change of outfan two polarized light energy.During a length of 3.035mm of polarization beam apparatus, outfan two polarizes luminous energy
Measure the change schematic diagram with applied field strengths as shown in Figure 4.In the range of magnetic field intensity is 0-350Oe, outfan X polarized light
The energy 12 of energy 11 and Y polarized light change less, it is impossible to realize the conversion of polarization mode.
Embodiment four
A kind of magnetic fluid fills the cross section of the tunable polarization beam apparatus of double-core photonic crystal fiber as it is shown in figure 1, be somebody's turn to do
Beam splitter is based on double-core photonic crystal fiber structure.Double-core photonic crystal fiber includes 1, two identical fuses of pure quartz substrate
2 and the airport of periodic arrangement, and the airport 3 of the upper and lower both sides of fuse, the airport 4 of the fuse left and right sides and away from fuse
The radius of airport 5 different.Wherein, in the airport 6 of fuse, it is filled with magnetic current at double-core photonic crystal fiber
Body.
In embodiment, magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber, two polarized light coupling distances
Change cause the change of outfan two polarized light energy.During a length of 8.430mm of polarization beam apparatus, outfan two polarizes luminous energy
Measure the change schematic diagram with applied field strengths as shown in Figure 5.When magnetic field intensity is 230Oe, the energy of outfan X polarized light
13 minimize, and the energy 14 of Y polarized light reaches maximum simultaneously, can realize the conversion of polarization mode.
Claims (4)
1. the tunable polarization beam apparatus of a magnetic fluid filling double-core photonic crystal fiber, it is characterised in that: this polarization beam splitting
Device is based on double-core photonic crystal fiber structure.Double-core photonic crystal fiber includes pure quartz substrate (1), two identical fuses
And the airport of periodic arrangement, and the airport (3) of the upper and lower both sides of fuse, the airport (4) of the fuse left and right sides and remote (2)
The radius of the airport (5) of off-chip is different.Wherein, at double-core photonic crystal fiber in the airport (6) of fuse
It is filled with magnetic fluid.
A kind of magnetic fluid the most according to claim 1 fills the tunable polarization beam apparatus of double-core photonic crystal fiber, its
It is characterised by: in the airport (6) of fuse, fill magnetic fluid at double-core photonic crystal fiber.The refractive index of magnetic fluid is with outward
The intensity in applying magnetic field, boundary changes.The change of magnetic fluid refractive index causes two polarization modes in double-core photonic crystal fiber
The change of effective refractive index, and then the coupling length of two polarization modes changes, thus, the energy of two polarization modes exists
Outfan changes.
A kind of magnetic fluid the most according to claim 1 fills the tunable polarization beam apparatus of double-core photonic crystal fiber, its
Being characterised by: when the external world does not applies magnetic field, polarization beam apparatus only exports X polarized light, and does not export Y polarized light.When in outside
When applying magnetic field, by regulating the intensity in magnetic field, at the outfan of polarization beam apparatus, the energy of X polarized light reduces.Meanwhile, Y is inclined
Shake light energy increase.At a certain fixed magnetic field intensity, at the outfan of polarization beam apparatus, X polarized light energy minimizes,
And Y polarized light energy is maximum, thus polarization mode changes, it is achieved that polarization state tunable.
A kind of magnetic fluid the most according to claim 1 fills the tunable polarization beam apparatus of double-core photonic crystal fiber, its
It is characterised by: these polarization beam apparatus two ends are connected with general single mode fiber respectively, uses single channel input, output.This polarization divides
Bundle device, under different magnetic field strength condition, respectively obtains the light of two polarization modes, and overcoming single photonic crystal fiber can only
Export the deficiency of one direction polarization state and eliminate the dependence utilizing fiber optic splitter entirely to access double-core photonic crystal fiber.This
Structure fabrication is simple, be lost little and be prone to integrated with single mode fiber system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610718815.2A CN106125197A (en) | 2016-08-24 | 2016-08-24 | A kind of magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber |
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| CN201610718815.2A CN106125197A (en) | 2016-08-24 | 2016-08-24 | A kind of magnetic fluid fills the tunable polarization beam apparatus of double-core photonic crystal fiber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990474A (en) * | 2017-03-03 | 2017-07-28 | 北京交通大学 | A kind of mono- polarization wavelength splitters of tunable single core photonic crystal fiber SPR |
| CN109633808A (en) * | 2019-01-10 | 2019-04-16 | 北京信息科技大学 | A kind of counter-bending super large mode area pcf |
| CN109975923A (en) * | 2019-05-06 | 2019-07-05 | 燕山大学 | A kind of magnetic fluid twin-core microstructured optical fibers for magnetic field sensing |
| CN109990845A (en) * | 2019-05-05 | 2019-07-09 | 中国计量大学 | Three core fibre magnetic fields and the temperature sensing structure of covering are removed in a kind of magnetic fluid and side |
| CN111897044A (en) * | 2020-08-18 | 2020-11-06 | 北京邮电大学 | Liquid crystal filled single-polarization output double-core photonic crystal fiber wavelength beam splitter |
| CN112230333A (en) * | 2020-10-29 | 2021-01-15 | 北京邮电大学 | V-shaped dual-core photonic crystal fiber polarization beam splitter with air hole plated with gold film |
| CN113296183A (en) * | 2021-05-25 | 2021-08-24 | 北京科技大学 | Double-core photonic crystal fiber polarization beam splitter based on liquid crystal filling |
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| CN104101944A (en) * | 2014-07-11 | 2014-10-15 | 天津理工大学 | Lead silicate glass double core photonic crystal fiber polarization beam splitter |
| CN105137540A (en) * | 2015-09-17 | 2015-12-09 | 合肥工业大学 | Short length polarization beam splitter based on liquid crystal filling pohotonic crystal fiber |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990474A (en) * | 2017-03-03 | 2017-07-28 | 北京交通大学 | A kind of mono- polarization wavelength splitters of tunable single core photonic crystal fiber SPR |
| CN106990474B (en) * | 2017-03-03 | 2019-10-22 | 北京交通大学 | A kind of mono- polarization wavelength splitter of tunable single core photonic crystal fiber SPR |
| CN109633808A (en) * | 2019-01-10 | 2019-04-16 | 北京信息科技大学 | A kind of counter-bending super large mode area pcf |
| CN109633808B (en) * | 2019-01-10 | 2021-11-02 | 北京信息科技大学 | Bending-resistant oversized mode field photonic crystal fiber |
| CN109990845A (en) * | 2019-05-05 | 2019-07-09 | 中国计量大学 | Three core fibre magnetic fields and the temperature sensing structure of covering are removed in a kind of magnetic fluid and side |
| CN109975923A (en) * | 2019-05-06 | 2019-07-05 | 燕山大学 | A kind of magnetic fluid twin-core microstructured optical fibers for magnetic field sensing |
| CN109975923B (en) * | 2019-05-06 | 2020-06-30 | 燕山大学 | Magnetic fluid dual-core microstructure optical fiber for magnetic field sensing |
| CN111897044A (en) * | 2020-08-18 | 2020-11-06 | 北京邮电大学 | Liquid crystal filled single-polarization output double-core photonic crystal fiber wavelength beam splitter |
| CN112230333A (en) * | 2020-10-29 | 2021-01-15 | 北京邮电大学 | V-shaped dual-core photonic crystal fiber polarization beam splitter with air hole plated with gold film |
| CN113296183A (en) * | 2021-05-25 | 2021-08-24 | 北京科技大学 | Double-core photonic crystal fiber polarization beam splitter based on liquid crystal filling |
| CN113296183B (en) * | 2021-05-25 | 2022-03-29 | 北京科技大学 | Double-core photonic crystal fiber polarization beam splitter based on liquid crystal filling |
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Application publication date: 20161116 |