CN205982709U - Gain photonic crystal optic fibre of zero nearly chromatic dispersion of high birefringence - Google Patents
Gain photonic crystal optic fibre of zero nearly chromatic dispersion of high birefringence Download PDFInfo
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- CN205982709U CN205982709U CN201620572653.1U CN201620572653U CN205982709U CN 205982709 U CN205982709 U CN 205982709U CN 201620572653 U CN201620572653 U CN 201620572653U CN 205982709 U CN205982709 U CN 205982709U
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Abstract
The utility model discloses a gain photonic crystal optic fibre of zero nearly chromatic dispersion of high birefringence, the optic fibre cross section divide into covering and fibre core, be equipped with big air hole in the covering, big air hole align to grid constitutes the regular hexagon array of hexagonal lattice, regular triangle is constituteed at the center in adjacent big three air hole, the fibre core is located the center by the regular hexagon of big air punch combination one -tenth, the fibre core is oval fibre core, the major axis of oval fibre core is parallel with a certain length of side of big empty pore forming's regular hexagon array, it is equipped with four little air holes to be close to between air hole and the fibre core of fibre core, four little air holes use the major axis of oval fibre core to distribute in the fibre core both sides as the symmetry axis, the shape in four little air holes is circular or oval. The utility model discloses a special construction (four little air holes) of the inlayer of special fiber core cross section and covering acquires zero nearly chromatic dispersion and higher birefringence, for pulsed laser's production and conveying gains the condition, obtains the interior single mode transmission's of fibre core high optical quality.
Description
Technical field
This utility model belongs to technical field of optical fiber and in particular to a kind of gain photonic crystal of the nearly zero dispersion of high birefringence
Optical fiber.
Background technology
Photonic crystal fiber is also called microstructured optical fibers or porous optical fiber, can be used for dispersion compensation and produces Gao Fei
Linearly, the active part or simultaneously as optical fiber laser.Regularly arranged the sky of micron dimension on the cross section of optical fiber
Pore, in axial direction extends.In the core of optical fiber be the base material of real core or refractive index is higher than base material
Other materials constitute fibre core.Cladding regions are to be dispersed with regularly arranged airport in base material.Light field primary limitation
In central area, commonly referred to as Internal Reflection Photonic Crystal Fiber.Changing it has related parameter can change its birefringence, non-thread
Property and dispersion etc..For can be used as gain section during optical fiber laser.
For being applied to pulse Yb doped fiber laser instrument, the generation of pulse and propagating depends on the dispersion of light path and two-fold
The parameter such as penetrate.Photonic crystal fiber is due to its flexible design characteristics it is convenient to pass through to change its air pore size distribution and sky
The shape and size of pore, to change the parameters such as its birefringence, non-linear and dispersion.After its fibre core mixes Yb ion, can
Using the gain section as optical fiber laser.But, in the specific implementation, there is also dispersion displaced from zero and affect pulse and pass
Defeated problem and birefringence are low and affect the problem that pulse keeps during Laser Transmission.
Utility model content
For problems of the prior art, this utility model provides a kind of gain photon of the nearly zero dispersion of high birefringence
Crystal optical fibre, solves the problems, such as existing to mix that dispersion absolute value in Yb gain photonic crystal fiber is larger and birefringence is relatively low.
For solving above-mentioned technical problem, this utility model employs the following technical solutions：
A kind of gain photonic crystal fiber of the nearly zero dispersion of high birefringence, cross section of optic fibre is divided into covering and fibre core, covering
Inside it is provided with big airport, the evenly distributed regular hexagon array constituting hexagonal lattice of big airport, adjacent three big airports
Center composition equilateral triangle, fibre core is located at the orthohexagonal center that is made up of big airport, and described fibre core is oval fine
Core, the major axis of oval fibre core is parallel with a certain length of side of the regular hexagon array that big airport is formed, near the air of fibre core
It is provided with four little airports, four little airports are distributed in fibre core with the major axis of oval fibre core for axis of symmetry between hole and fibre core
Both sides, four little airports generally circular in shape or oval.
Described fibre core is the fibre core made using ytterbium doping alumina silicate glass, removes its remaining part of big airport in covering
It is divided into quartz material.
The diameter of described big airport is less than 0.95 with the ratio in the distance between the two neighboring big airport center of circle.
When described little airport is circular, the diameter of little airport is not less than 400 nanometers, and the diameter of little airport is little
0.5 times of distance between the two neighboring big airport center of circle.
When described little airport is oval, the minor axis length of little airport is not less than 400 nanometers,
The long axis length of little airport is not more than 0.5 times of distance between the two neighboring big airport center of circle.
When described little airport is oval, the major axis of little airport and the longer axis parallel of fibre core.
The semi-major axis of oval fibre core is not less than 0.5 μm, and semi-minor axis is not less than 0.3 μm.
The center of described little airport is centrally located at consistent lattice position with big airport.
The little airport of four circles of covering inner region or oval little airport, its diameter or ellipticity, size
It is optionally combined within the specific limits, obtain different birefringences and mode field area；The semi-major axis of oval fibre core, semi-minor axis, ellipse
The arbitrarily adjustment combination within the specific limits of circle rate, to obtain different birefringences and mode field area；Core region is interior with covering
Portion region is optionally combined within the specific limits, to obtain different birefringences and mode field area.
The beneficial effects of the utility model：The present invention passes through to change the spacing of airport, the dutycycle of covering, and covering is interior
The shape and size of four aperture of layer, introduce high birefringence makes photonic crystal fiber have nearly zero dispersion simultaneously.This practicality is new
Type employs the structure of ellipse in core region, and cladding regions have selected the hexagonal structure of defect in innermost layer（Compare six
Corner structure has lacked two little airports）, have four little airports, cross section is oval or circular, by special fibre core
Cross section, and the special construction of covering innermost layer（Four little airports are with ellipse）, obtain nearly zero dispersion and higher two-fold
Penetrate, be that generation and the transmission of pulse laser achieves condition, to reach the mesh obtaining the high light beam quality of single mode transport in fibre core
's.
Brief description
Fig. 1 is the structural representation of this utility model embodiment 1.
Fig. 2 is the structural representation of this utility model embodiment 2.
Fig. 3 is photonic crystal fiber shown in Fig. 2 in the interval dispersion curve of 700nm 1680nm.
Fig. 4 is birefringence curve at 700nm 1680nm interval for the photonic crystal fiber shown in Fig. 2.
Specific embodiment
With reference to specific embodiment, this utility model is described further.It should be understood that following examples are only used for
, not for limiting scope of the present utility model, the person skilled in the art in this field can be according to above-mentioned practicality for bright this utility model
New content is made some nonessential improvement and is adjusted.
Embodiment 1
As shown in figure 1, a kind of gain photonic crystal fiber of the nearly zero dispersion of high birefringence, cross section of optic fibre be divided into covering and
Fibre core 3, is provided with big airport 1 in covering, the evenly distributed regular hexagon array constituting hexagonal lattice of big airport, and adjacent three
The center composition equilateral triangle of individual big airport, fibre core is located at the orthohexagonal center being made up of big airport, big airport
The ratio in the distance between diameter and the two neighboring big airport center of circle be less than 0.95, described fibre core is oval fibre core, ellipse
The semi-major axis of circular core is not less than 0.5 μm, and semi-minor axis is not less than 0.3 μm.
The major axis of oval fibre core is parallel with a certain length of side of the regular hexagon array that big airport is formed, near fibre core
It is provided with four little airports, four little airports are distributed in the major axis of oval fibre core for axis of symmetry between airport and fibre core
Fibre core both sides, the center of little airport is centrally located at consistent lattice position, the shape of four little airports with big airport
For ellipse, the major axis of little airport and the longer axis parallel of fibre core, the minor axis length of little airport is not less than 400 nanometers, little sky
The long axis length of pore is not more than 0.5 times of distance between the two neighboring big airport center of circle.
Described fibre core is the fibre core made using ytterbium doping alumina silicate glass, removes its remaining part of big airport in covering
4 are divided to be quartz material.
Embodiment 2
The little airport 2 of the present embodiment is circle, and the diameter of little airport is not less than 400 nanometers, and little airport is straight
Footpath is not more than 0.5 times of distance between the two neighboring big airport center of circle, and other embodiment is with embodiment 1.
Example of the present utility model is a kind of Internal Reflection Photonic Crystal Fiber.As shown in Figure 3 and Figure 4, using limited
First method have studied its dispersion, birefringence.Research shows that different structural parameters have degree different to the performance of photonic crystal fiber
Impact, at 1060nm, birefringence can reach 10-4, this is the rank of special polarization maintaining optical fibre, dispersion can reach-
0.00083ps•nm-1•km-1.Zero dispersion point occurs near 1070nm.The photonic crystal fiber that this utility model is related to can
To obtain important application in terms of optical fiber laser.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have been shown and described above.This
The technical staff of industry, it should be appreciated that this utility model is not restricted to the described embodiments, retouches in above-described embodiment and description
That states simply illustrates principle of the present utility model, on the premise of without departing from this utility model spirit and scope, this utility model
Also have various changes and modifications, these changes and improvements both fall within the range of claimed this utility model.This practicality is new
Type claims scope by appending claims and its equivalent thereof.
Claims (6)
1. the gain photonic crystal fiber of the nearly zero dispersion of a kind of high birefringence, cross section of optic fibre is divided into covering and fibre core, in covering
It is provided with big airport, the evenly distributed regular hexagon array constituting hexagonal lattice of big airport, adjacent three big airports
Center forms equilateral triangle, fibre core be located at the orthohexagonal center that is made up of big airport it is characterised in that：Described fibre core is
Oval fibre core, the major axis of oval fibre core is parallel with a certain length of side of the regular hexagon array that big airport is formed, near fine
It is provided with four little airports, four little airports are divided with the major axis of oval fibre core for axis of symmetry between the airport of core and fibre core
Cloth in fibre core both sides, four little airports generally circular in shape or oval, described fibre core is to be adulterated aluminosilicate using ytterbium
The fibre core that glass is made, the remainder removing big airport in covering is quartz material, and the semi-major axis of oval fibre core is not little
In 0.5 μm, semi-minor axis is not less than 0.3 μm.
2. the nearly zero dispersion of high birefringence according to claim 1 gain photonic crystal fiber it is characterised in that：Described big
The diameter of airport is less than 0.95 with the ratio in the distance between the two neighboring big airport center of circle.
3. the nearly zero dispersion of high birefringence according to claim 1 gain photonic crystal fiber it is characterised in that：Described little
When airport is circular, the diameter of little airport is not less than 400 nanometers, and the diameter of little airport is not more than two neighboring big sky
0.5 times of distance between the pore center of circle.
4. the nearly zero dispersion of high birefringence according to claim 1 gain photonic crystal fiber it is characterised in that：Described little
When airport is oval, the minor axis length of little airport is not less than 400 nanometers, and the long axis length of little airport is no more than adjacent
0.5 times of distance between two big airport centers of circle.
5. the nearly zero dispersion of high birefringence according to claim 1 gain photonic crystal fiber it is characterised in that：Described little
When airport is oval, the major axis of little airport and the longer axis parallel of fibre core.
6. the nearly zero dispersion of high birefringence according to claim 1 gain photonic crystal fiber it is characterised in that：Described little
The center of airport is centrally located at consistent lattice position with big airport.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620572653.1U CN205982709U (en) | 2016-06-15 | 2016-06-15 | Gain photonic crystal optic fibre of zero nearly chromatic dispersion of high birefringence |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620572653.1U CN205982709U (en) | 2016-06-15 | 2016-06-15 | Gain photonic crystal optic fibre of zero nearly chromatic dispersion of high birefringence |
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| CN205982709U true CN205982709U (en) | 2017-02-22 |
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| CN201620572653.1U Expired - Fee Related CN205982709U (en) | 2016-06-15 | 2016-06-15 | Gain photonic crystal optic fibre of zero nearly chromatic dispersion of high birefringence |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398781A (en) * | 2018-03-12 | 2018-08-14 | 北京理工大学 | A kind of method of analog optical fiber laser free space optics coherence tomography Energy distribution |
| CN108593598A (en) * | 2018-05-04 | 2018-09-28 | 华北水利水电大学 | A kind of double-core photonic crystal fiber sensor of detection high refractive index liquid |
| 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 |
-
2016
- 2016-06-15 CN CN201620572653.1U patent/CN205982709U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398781A (en) * | 2018-03-12 | 2018-08-14 | 北京理工大学 | A kind of method of analog optical fiber laser free space optics coherence tomography Energy distribution |
| CN108593598A (en) * | 2018-05-04 | 2018-09-28 | 华北水利水电大学 | A kind of double-core photonic crystal fiber sensor of detection high refractive index liquid |
| CN108593598B (en) * | 2018-05-04 | 2020-11-06 | 华北水利水电大学 | Double-core photonic crystal optical fiber sensor for detecting high-refractive-index liquid |
| 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 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20180615 |