CN102854562A - High double-refraction photonic crystal fiber (PCF) - Google Patents
High double-refraction photonic crystal fiber (PCF) Download PDFInfo
- Publication number
- CN102854562A CN102854562A CN201210380219XA CN201210380219A CN102854562A CN 102854562 A CN102854562 A CN 102854562A CN 201210380219X A CN201210380219X A CN 201210380219XA CN 201210380219 A CN201210380219 A CN 201210380219A CN 102854562 A CN102854562 A CN 102854562A
- Authority
- CN
- China
- Prior art keywords
- airport
- optical fiber
- fibre core
- little
- circle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses a high double-refraction photonic crystal fiber (PCF) comprising a fiber core and a cladding. Two small air holes are removed from the central part of an optical fiber so that an ellipse-like fiber core is formed; meanwhile, the structural arrangement of the air holes of the cladding is changed, and four pairs of large air holes and a pair of elliptic air holes are introduced to the cladding and connected to the fiber core, so that the optical fiber with the structure has double rotation symmetry, a cross-polarization mode is not degenerated again, and very high double-refraction is shown. Through changing the structure of the fiber core and adjusting the diameters of the large air holes and the ellipticities of the elliptic air holes within a certain range, the PCF is two orders of magnitudes higher than a common optical fiber due to the adoption of the mode of double refraction, and meanwhile, the optical fiber has a high nonlinear coefficient. The PCF provided by the invention has the advantages of simple structure, high double-refraction and high nonlinearity. The PCF with the structure can be used for manufacturing a polarization-preserving optical fiber and relevant optical fiber devices with proper nonlinearity or polarization characteristics.
Description
Technical field
The invention belongs to the optical fiber technology field, particularly a kind of photonic crystal fiber.
Background technology
In the ideal case, two mutually orthogonal patterns of single-mode fiber transmission, they have identical propagation constant, and therefore degeneracy can regard single polarization electric vector as each other.Yet how much actual optical fiber has some imperfections, and inner refractive index distributes also and to cause the inhomogeneous of refractive index because of internal stress inhomogeneous.This just causes the variation of two fundamental mode propagation constants, thereby causes the disturbance of basic mode polarization state in the single-mode fiber, has destroyed the mutual degeneracy characteristic of basic mode, thereby has caused mode birefringence.Polarization maintaining optical fibre then is to introduce artificially geometrically anisotropic on the xsect of optical fiber, so that the coupling coefficient of two basic modes in the optical fiber reduces, and then causes pairwise orthogonal propagation constant β
xWith β
yPoor increase, that is: Δ β=β
x-β
yLarger, then the mode birefringence degree is higher.
Photonic crystal fiber (photonic crystal fiber is called for short PCF) is called again microstructured optical fibers or porous optical fiber.The specific arrangement structure of photonic crystal fiber covering hollow pore makes it present many characteristics of realizing of being difficult in traditional fiber, as the peculiar property such as can regulate and large die face is long-pending without single mode transport, high birefringence, high non-linearity, the dispersion of cut-off, become a focus of current research, and be widely used in the fields such as light sensing, optical communication and nonlinear optics.High birefringence optical fiber reaches aspect Application in Sensing linear polarization polarisation of light hold facility aspect is had a wide range of applications.In the tradition high birefringence optical fiber, fibre core is doped with GeO
2Its loss can increase in the nuclear radiation situation, and nuclear blast tolerance and temperature stabilization performance are low, and high double-refraction photon crystal fiber is to be formed by pure quartz material, and can design different architecture advances optical fiber properties, have the incomparable superiority of traditional high birefringence optical fiber.The structural design of high double-refraction photon crystal fiber is flexible, by introduce the shape of airport not of uniform size, change fibre core or covering airport in covering, can obtain the high double-refraction photon crystal fiber of excellent performance.
Summary of the invention
In order to overcome the low deficiency of prior art birefringence, the present invention proposes a kind of photonic crystals optical fiber structure with high birefringence characteristic of simple in structure and easy making, this structure itself has double rotational symmetry, can obtain than the higher birefringence of existing birefringence mode photonic crystal fiber, and nonlinear factor is higher.
High double-refraction photon crystal fiber provided by the invention comprises fibre core and covering, and described covering is arranged on the fibre core outer peripheral areas, and cladding index is lower than core segment.
Background material (2) at described optical fiber upward is furnished with one group of airport structure according to the regular grid node, wherein, middle three rows' circular little airport (3) is square structure to be arranged, and per three the adjacent little airports of the circular little airport (3) of all the other both sides are the equilateral triangle structural arrangement in the optical fiber cross section; The diameter of circular little airport (3) is d;
The fibre core of described optical fiber (1) is the high index of refraction core district that is formed by the disappearance that is centered close to two the little airports of circle (3) on the regular grid node;
The covering of described optical fiber is the equivalent region of low refractive index that is formed by the airport structure on the regular grid node of background material (2), is comprised of inner cladding and surrounding layer, be positioned at fibre core (1) around; Described inner cladding consists of (as shown in Figure 1) by the background material (2) of four pairs of large airports of circle (4) and a pair of oval airport (5) and periphery, oval airport (5) is formed by two little airports of circle (3) replacement that symmetry is positioned at fibre core (1) both sides, and four pairs of large airports of circle (4) are replaced by the four pairs of little airports of circle (3) that are positioned at fibre core (1) and oval airport (5) both sides and formed; The major diameter of described oval airport (5) is d, and the minor axis diameter is d/2; The diameter of the large airport of described circle (4) is D;
The diameter that described surrounding layer is arranged by rule in background material (2) is that the circular little airport (3) of d and the background material (2) of periphery consist of;
The center distance of all adjacent vacant pores is Λ, 2d〉Λ〉D〉d; The material of described fibre core (1) is identical with the background material (2) of covering.
The background material (2) of the material of described fibre core (1) and covering is pure quartz or polymeric material.
Advantage of the present invention and beneficial effect:
The present invention proposes a kind of photonic crystals optical fiber structure with high birefringence characteristic of simple in structure and easy making, this structure arranges by changing covering airport structure, introducing four pairs of large airports of circle, a pair of oval airports in covering links to each other with fibre core, therefore this structured optical fiber has double rotational symmetry, orthogonal polarization mode is degeneracy no longer, shows very high birefringence.The mode birefringence of this photonic crystal fiber reaches 10 than the high at least order of magnitude of ordinary optic fibre
-2Magnitude, simultaneously, the nonlinear factor of this structured optical fiber is very high.Therefore, the photonic crystal fiber of this structure can be used for making polarization maintaining optical fibre and the associated fiber device with non-linear or polarization characteristic, and because the birefringence of optical fiber is to realize by the physical dimension that changes airport, the impact of temperature is very little, good stability, thereby be more suitable for actual application.
The present invention is further described with implementing profit below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the high double-refraction photon crystal fiber cross sectional representation of one embodiment of the invention;
Among the figure, (1) fibre core, (2) background material, (3) diameter are that circular little airport, (4) diameter of d is that circular large airport, (5) major diameter of D is d, and the minor axis diameter is the oval airport of d/2, the spacing of Λ-adjacent vacant pore.
Fig. 2 is the mould field pattern of Fig. 1 embodiment 1 optical fiber, and wherein a is the distribution of amplitudes pattern of x polarization basic mode mould field, and b is the distribution of amplitudes pattern of y polarization basic mode mould field;
Fig. 3 is that pattern effective refractive index on two orthogonal directionss calculating of Fig. 1 embodiment 1 optical fiber is with the variation relation figure of wavelength;
Fig. 4 is that the pattern effective refractive index on two orthogonal directionss calculating of Fig. 1 embodiment 1 optical fiber is poor, and namely birefringence B is with the variation relation figure of wavelength;
Fig. 5 is that nonlinear factor γ on two orthogonal directionss calculating of Fig. 1 embodiment 1 optical fiber is with the variation relation figure of wavelength.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Embodiment
A kind of high double-refraction photon crystal fiber, cross-sectional structure comprise fibre core and covering as shown in Figure 1.
Background material (2) at described optical fiber upward is furnished with one group of airport structure according to the regular grid node, wherein, middle three rows' circular little airport (3) is square structure to be arranged, and per three the adjacent little airports of the circular little airport (3) of all the other both sides are the equilateral triangle structural arrangement in the optical fiber cross section; The diameter of circular little airport (3) is d.
The fibre core of described optical fiber (1) is to be the high index of refraction core district that the disappearance of the little airport (3) of d forms by being centered close to two diameters on the regular grid node;
The covering of described optical fiber is the equivalent region of low refractive index that is formed by the airport structure on the regular grid node of background material (2), is comprised of inner cladding and surrounding layer, be positioned at fibre core (1) around;
The diameter that described surrounding layer is arranged by rule in background material (2) is that the circular little airport (3) of d and the background material (2) of periphery consist of; Described inner cladding consists of (in dotted line frame among the figure) by the background material (2) of four pairs of large airports of circle (4) and a pair of oval airport (5) and periphery;
Described four pairs of large airports of circle (4) symmetry is positioned at fibre core (1) both sides; The diameter of the large airport of described circle (4) is D; Described a pair of oval airport (5) symmetry is positioned at fibre core (1) both sides; The major diameter of described oval airport (5) is d, and the minor axis diameter is d/2; The center distance of all adjacent vacant pores is Λ, 2d〉Λ〉D〉d; The material of described fibre core (1) is identical with the background material (2) of covering.
In this example, selecting background material (2) is pure quartz, the diameter d of the little airport of surrounding layer (3)=0.588 μ m, the diameter D=0.941 μ m of the large airport of inner cladding (4), the major diameter d=0.588 μ m of oval airport (5), minor axis diameter d/2=0.294 μ m, the spacing Λ of airport=1 μ m.Obtain the field distribution of basic mode mould, pattern effective refractive index, the poor B of pattern effective refractive index, nonlinear factor of photonic crystal fiber under this parameter respectively shown in Fig. 2 to 5.
Fig. 2 result shows, because this structure has double rotational symmetry, so two orthogonal polarisation state of optical fiber basic mode degeneracy no longer, be separated into two not patterns of degeneracy---x polarization basic mode and y polarization basic mode, and each basic mode exists x and y durection component.The x durection component amplitude of x polarization basic mode presents very strong x polarization characteristic much larger than y durection component amplitude; And y polarization basic mode x durection component amplitude presents very strong y polarization characteristic much smaller than y durection component amplitude.
Fig. 3 result shows,
Effective index greater than
Effective index, and effective refractive index reduces with the increase of wavelength.
Fig. 4 result shows, birefringence effect is linear the increase with the increase of wavelength, when wavelength X=1550nm, and birefringence B=1.53 * 10
-2, exceed two orders of magnitude than the birefringence of ordinary optic fibre.
Fig. 5 result shows, this double refraction photo crystal optical fiber has high nonlinear factor, at wavelength X=1550nm place,
Mould and
The nonlinear factor γ of mould is respectively 42W
-1Km
-1And 28W
-1Km
-1
A kind of high double-refraction photon crystal fiber structure, selecting background material (2) is polymeric material, the diameter d of the little airport of surrounding layer (3)=0.588 μ m, the diameter D=0.941 μ m of the large airport of inner cladding (4), the major diameter a=0.588 μ m of oval airport (5), minor axis diameter b=0.294 μ m, the spacing Λ of airport=1 μ m.
Claims (2)
1. a high double-refraction photon crystal fiber comprises fibre core and covering, and described covering is arranged on the fibre core outer peripheral areas, and cladding index is lower than core segment, it is characterized in that:
Background material (2) at described optical fiber upward is furnished with one group of airport structure according to the regular grid node, wherein, middle three rows' circular little airport (3) is square structure to be arranged, and per three the adjacent little airports of the circular little airport (3) of all the other both sides are the equilateral triangle structural arrangement in the optical fiber cross section; The diameter of circular little airport (3) is d;
The fibre core of described optical fiber (1) is the high index of refraction core district that is formed by the disappearance that is centered close to two the little airports of circle (3) on the regular grid node;
The covering of described optical fiber is the equivalent region of low refractive index that is formed by the airport structure on the regular grid node of background material (2), is comprised of inner cladding and surrounding layer, be positioned at fibre core (1) around; Described inner cladding is made of the background material (2) of four pairs of large airports of circle (4) and a pair of oval airport (5) and periphery, oval airport (5) is formed by two little airports of circle (3) replacement that symmetry is positioned at fibre core (1) both sides, and four pairs of large airports of circle (4) are replaced by the four pairs of little airports of circle (3) that are positioned at fibre core (1) and oval airport (5) both sides and formed; The major diameter of described oval airport (5) is d, and the minor axis diameter is d/2; The diameter of the large airport of described circle (4) is D;
The diameter that described surrounding layer is arranged by rule in background material (2) is that the circular little airport (3) of d and the background material (2) of periphery consist of;
The center distance of all adjacent vacant pores is Λ, 2d〉Λ〉D〉d; The material of described fibre core (1) is identical with the background material (2) of covering.
2. high double-refraction photon crystal fiber according to claim 1, it is characterized in that: the background material (2) of the material of described fibre core (1) and covering is pure quartz or polymeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210380219.XA CN102854562B (en) | 2012-10-09 | 2012-10-09 | High double-refraction photonic crystal fiber (PCF) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210380219.XA CN102854562B (en) | 2012-10-09 | 2012-10-09 | High double-refraction photonic crystal fiber (PCF) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102854562A true CN102854562A (en) | 2013-01-02 |
| CN102854562B CN102854562B (en) | 2014-03-05 |
Family
ID=47401302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210380219.XA Expired - Fee Related CN102854562B (en) | 2012-10-09 | 2012-10-09 | High double-refraction photonic crystal fiber (PCF) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102854562B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197372A (en) * | 2013-04-12 | 2013-07-10 | 浙江工业大学 | Photon crystal optical fiber |
| CN103197371A (en) * | 2013-04-12 | 2013-07-10 | 浙江工业大学 | Birefringence photonic crystal fiber |
| CN103472527A (en) * | 2013-09-27 | 2013-12-25 | 天津理工大学 | High-birefringence low-confinement-loss photonic crystal fiber |
| CN103645535A (en) * | 2013-12-11 | 2014-03-19 | 江苏大学 | High double-refraction terahertz optical fiber |
| CN104808285A (en) * | 2015-04-15 | 2015-07-29 | 南京邮电大学 | High double-refraction chromatic dispersion adjustable pohotonic crystal fiber |
| CN105116486A (en) * | 2015-09-29 | 2015-12-02 | 燕山大学 | Octagonal photonic crystal optical-fiber polarization beam splitter |
| CN104166179B (en) * | 2014-07-21 | 2016-09-07 | 南京邮电大学 | A kind of high double-refraction photon crystal fiber |
| CN109932777A (en) * | 2018-12-12 | 2019-06-25 | 西南科技大学 | A kind of high sensitivity pressure sensing photonic crystal fiber and its pressure sensor |
| CN113671620A (en) * | 2021-08-23 | 2021-11-19 | 燕山大学 | Single-core polarization-maintaining dispersion compensation microstructure optical fiber |
| CN114200573A (en) * | 2021-11-19 | 2022-03-18 | 淮阴工学院 | High-nonlinearity high-birefringence photonic crystal polarization maintaining fiber based on liquid filling |
| CN114994829A (en) * | 2022-06-15 | 2022-09-02 | 南京信息工程大学 | Novel high-birefringence low-dispersion photonic crystal fiber |
| CN115061234A (en) * | 2022-07-08 | 2022-09-16 | 北京航空航天大学 | Sound pressure high-sensitivity solid core photonic crystal fiber, preparation method and underwater acoustic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060024009A1 (en) * | 2002-12-11 | 2006-02-02 | Hirokazu Kubota | Single mode photonic crystal optical fiber |
| CN1837867A (en) * | 2006-04-29 | 2006-09-27 | 南开大学 | Broadband single-polarization single-mode dual-core photonic crystal fiber |
| CN2916656Y (en) * | 2006-05-12 | 2007-06-27 | 浙江工业大学 | Birefracting photon crystal optical fiber |
| CN101551490A (en) * | 2009-04-30 | 2009-10-07 | 天津理工大学 | Sagnac interferometer type comb filter with channel spacing unrelated with operating wavelength |
| CN201368927Y (en) * | 2009-01-14 | 2009-12-23 | 张亚妮 | High-polarization maintaining polymer photonic crystal fiber |
-
2012
- 2012-10-09 CN CN201210380219.XA patent/CN102854562B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060024009A1 (en) * | 2002-12-11 | 2006-02-02 | Hirokazu Kubota | Single mode photonic crystal optical fiber |
| CN1837867A (en) * | 2006-04-29 | 2006-09-27 | 南开大学 | Broadband single-polarization single-mode dual-core photonic crystal fiber |
| CN2916656Y (en) * | 2006-05-12 | 2007-06-27 | 浙江工业大学 | Birefracting photon crystal optical fiber |
| CN201368927Y (en) * | 2009-01-14 | 2009-12-23 | 张亚妮 | High-polarization maintaining polymer photonic crystal fiber |
| CN101551490A (en) * | 2009-04-30 | 2009-10-07 | 天津理工大学 | Sagnac interferometer type comb filter with channel spacing unrelated with operating wavelength |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197371A (en) * | 2013-04-12 | 2013-07-10 | 浙江工业大学 | Birefringence photonic crystal fiber |
| CN103197371B (en) * | 2013-04-12 | 2014-12-17 | 浙江工业大学 | Birefringence photonic crystal fiber |
| CN103197372A (en) * | 2013-04-12 | 2013-07-10 | 浙江工业大学 | Photon crystal optical fiber |
| CN103472527A (en) * | 2013-09-27 | 2013-12-25 | 天津理工大学 | High-birefringence low-confinement-loss photonic crystal fiber |
| CN103472527B (en) * | 2013-09-27 | 2015-08-05 | 天津理工大学 | A kind of High-birefringence low-confinement-lossphotonic photonic crystal fiber |
| CN103645535A (en) * | 2013-12-11 | 2014-03-19 | 江苏大学 | High double-refraction terahertz optical fiber |
| CN103645535B (en) * | 2013-12-11 | 2015-08-26 | 江苏大学 | A kind of high birefringence Hz optical fiber |
| CN104166179B (en) * | 2014-07-21 | 2016-09-07 | 南京邮电大学 | A kind of high double-refraction photon crystal fiber |
| CN104808285B (en) * | 2015-04-15 | 2017-08-01 | 南京邮电大学 | A kind of high birefringence dispersion-tunable photonic crystal fiber |
| CN104808285A (en) * | 2015-04-15 | 2015-07-29 | 南京邮电大学 | High double-refraction chromatic dispersion adjustable pohotonic crystal fiber |
| CN105116486A (en) * | 2015-09-29 | 2015-12-02 | 燕山大学 | Octagonal photonic crystal optical-fiber polarization beam splitter |
| CN109932777A (en) * | 2018-12-12 | 2019-06-25 | 西南科技大学 | A kind of high sensitivity pressure sensing photonic crystal fiber and its pressure sensor |
| CN113671620A (en) * | 2021-08-23 | 2021-11-19 | 燕山大学 | Single-core polarization-maintaining dispersion compensation microstructure optical fiber |
| CN113671620B (en) * | 2021-08-23 | 2022-05-24 | 燕山大学 | Single-core polarization-maintaining dispersion compensation microstructure optical fiber |
| CN114200573A (en) * | 2021-11-19 | 2022-03-18 | 淮阴工学院 | High-nonlinearity high-birefringence photonic crystal polarization maintaining fiber based on liquid filling |
| CN114200573B (en) * | 2021-11-19 | 2023-01-20 | 淮阴工学院 | High-nonlinearity high-birefringence photonic crystal polarization maintaining fiber based on liquid filling |
| CN114994829A (en) * | 2022-06-15 | 2022-09-02 | 南京信息工程大学 | Novel high-birefringence low-dispersion photonic crystal fiber |
| CN114994829B (en) * | 2022-06-15 | 2023-05-09 | 南京信息工程大学 | Novel high-birefringence low-dispersion photonic crystal fiber |
| CN115061234A (en) * | 2022-07-08 | 2022-09-16 | 北京航空航天大学 | Sound pressure high-sensitivity solid core photonic crystal fiber, preparation method and underwater acoustic device |
| CN115061234B (en) * | 2022-07-08 | 2024-04-02 | 北京航空航天大学 | Sound pressure high-sensitivity solid-core photonic crystal fiber, preparation method and underwater acoustic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102854562B (en) | 2014-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102854562B (en) | High double-refraction photonic crystal fiber (PCF) | |
| CN107238890B (en) | A kind of photonic crystal fiber transmitting 22 photon angular momentum moulds | |
| CN103472527B (en) | A kind of High-birefringence low-confinement-lossphotonic photonic crystal fiber | |
| CN102866456A (en) | High-birefringence photonic crystal optical fiber low in limit loss | |
| CN100585438C (en) | A kind of high non-linear single polarization single-mould photonic crystal fiber | |
| CN101464538A (en) | Photonic crystal fiber with ultra-high double refraction and ultra-low limitation loss | |
| CN103454720A (en) | Photonic crystal fiber with high birefringence characteristic | |
| CN101201432B (en) | Panda type high double-refraction photon crystal fiber | |
| CN104991305A (en) | Oval high-birefringence soft glass photonic crystal fiber | |
| CN102540324A (en) | Dual-band orthogonal single polarization single mode photonic crystal fiber | |
| CN103913801A (en) | Novel pohotonic crystal fiber | |
| CN104237999A (en) | Broadband terahertz wave polarization-maintaining transmission optical fiber | |
| CN106707405A (en) | High birefringence large-core porous core photonic crystal optical fiber | |
| CN102279439A (en) | Hybrid light-guiding type single-polarization single-mode optical fiber | |
| CN2916656Y (en) | Birefracting photon crystal optical fiber | |
| CN103323909A (en) | Small diameter polarization maintaining photonic crystal fiber | |
| CN108732678A (en) | A kind of photonic crystal fiber | |
| CN103197371B (en) | Birefringence photonic crystal fiber | |
| CN104020521A (en) | Square structured all-solid-state band gap fiber | |
| CN104678485A (en) | Photonic crystal fiber with high birefringence, high nonlinearity and low confinement loss | |
| CN219245801U (en) | High-birefringence low-loss large negative dispersion photonic crystal fiber | |
| CN102819062B (en) | Air hole square array fiber core annular doping four-core photonic crystal fiber | |
| CN104808285A (en) | High double-refraction chromatic dispersion adjustable pohotonic crystal fiber | |
| CN104597558A (en) | Novel high birefringence high non-linearirty photonic crystal fiber | |
| CN203658616U (en) | Soft glass photonic crystal fiber polarization beam splitter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20141009 |
|
| EXPY | Termination of patent right or utility model |