CN1291254C - Double-refraction microstructure optical fiber and its mfg. method - Google Patents
Double-refraction microstructure optical fiber and its mfg. method Download PDFInfo
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- CN1291254C CN1291254C CN 200410030660 CN200410030660A CN1291254C CN 1291254 C CN1291254 C CN 1291254C CN 200410030660 CN200410030660 CN 200410030660 CN 200410030660 A CN200410030660 A CN 200410030660A CN 1291254 C CN1291254 C CN 1291254C
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- 239000010453 quartz Substances 0.000 claims abstract description 98
- 239000000835 fiber Substances 0.000 claims abstract description 52
- 238000005253 cladding Methods 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 35
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- 238000005491 wire drawing Methods 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
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- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 8
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Abstract
The present invention relates to a double-refraction microstructure optical fiber and a manufacture method thereof. The double-refraction microstructure optical fiber comprises an interior region using a fiber core region as a center, a micropore array buried along the axial direction of the optical fiber, an envelope region surrounding the interior region, and a coating layer region; large effective refractivity differences are formed in two directions mutually vertical in the optical fiber by changing the shape structure, the dimension, the number and the array shape of micropores; the double-refraction microstructure optical fiber with excellent performance is manufactured. The manufacture method of the double-refraction microstructure optical fiber comprises the steps that pure or doped quartz micro-sticks and pure quartz micropore pipes with certain wall thickness are manufactured; the quartz micro-sticks and the quartz micropore pipes are processed into special shapes; the quartz micro-sticks and the quartz micropore pipes are combined into scheduled arrays; the quartz micro-sticks and the quartz micropore pipes whose array shapes are arranged well are combined in a quartz sleeve pipe to be assembled into bundles which are drawn into wires to be formed into the optical fiber.
Description
Technical field
The present invention relates to microstructured optical fibers and manufacture method thereof, particularly have the microstructured optical fibers and the manufacture method thereof of birefringenct property.
Background technology
Microstructured optical fibers (MOF) be meant the covering of optical fiber and (or) optical fiber of distributing in the fibre core certain diameter and some micropores, this micropore is parallel to the fiber optic hub axis and runs through whole optical fiber.When regular micropore arranging on cross section of optic fibre has two-dimensional periodic structure, and remain unchanged substantially in third dimension direction (optical fiber axially), the cross section of optic fibre refractive index presents two-dimensional periodic structure, and the novel structure optical fiber with this specific character is also referred to as photonic crystal fiber (Photonic CrystalFiber).
Photonic crystal fiber can be divided into two kinds on total internal reflection (TIR) type and photon band gap (PBG) type according to the propagation principle of light in optical fiber.The full-internal reflection type photonic crystal fiber is different with traditional fiber be along fiber axis to the suprasil covering in burying the array micropore, fibre core still is that transparent quartz material is formed.Photon band gap is meant electromagnetic some frequency band or wavelength, and the electromagnetic wave of these frequency bands or wavelength does not allow in photonic crystal at least the transmission at both direction.We can say that also these do not allow the electromagnetic frequency band or the wavelength that transmit in photonic crystal, be exactly photon band gap.The concrete numerical value of photon band gap (forbid transmit frequency band or wavelength) is deferred to the Bragg reflection law of light in crystalline material, is determined by the ad hoc structure parameter of photonic crystal.But, be not in all photonic crystal photonic band gap effects to be arranged all, have only in the photonic crystal of particular design and just have photonic band gap effects.Photon band gap type photonic crystal fiber does not need the fiber core refractive index condition high than cladding index, but very strict to the accuracy requirement of periodic micro structure.The variations in refractive index cycle of periodic arrangement material is the order of magnitude of optical wavelength, there is media defect in the medium of periodic arrangement, owing to be subjected to the influence of PBG, wavelength to a certain wave band produces the band gap influence, therefore the light wave of this wave band can not be propagated in the medium of periodic arrangement, and is limited in propagating in the defective.Periodically fibre core appears in the center of covering, and fibre core has formed defective, thereby light is limited in propagating in the fibre core.Fibre core can be a vacuum, also can be that other low packing material of refractive index ratio cladding index (comprising gas, liquid, solid) is formed.
By little glass bar and little glass tube are piled into predefined array pattern, its set is fixed together, become the optical fiber of predetermined diameter promptly can make photonic crystal fiber through suitable drawing process wire drawing then.
Because photonic crystal fiber is made up of many small unit, so its design and manufacturing just have higher flexibility and degree of freedom.In photonic crystal fiber design and manufacture process, can be by in fibre core, introducing multicore, thereby or introduce the fibre core generation geometric configuration birefringence of non-circle symmetry; By in covering, introducing difform structural unit, perhaps non-circular symmetrical structure unit, thereby generation structural birefringence; Thereby also can produce stress birefrin by in covering, mixing; Also can near the core district, mix polar material,, and optical fiber be applied transverse electric field to strengthen birefringence as nematic liquid crystalline material.In a word, adopt the assembling microstructures of photonic crystal fiber and manufacturing new technology and new technology can produce novel polarization-maintaining fiber.
Summary of the invention
The purpose of this invention is to provide the microstructured optical fibers with birefringenct property and the method for processing and manufacturing birefringence fiber.The covering of this optical fiber is axially being buried microwell array along fiber core, by adjusting the diameter (d) of micropore in the fibre cladding, the spacing between the micropore (Λ), and the ratio of micropore (d/ Λ), the effective refractive index (n of fibre cladding
Eff) take place to change accordingly.If the micropore of (X-axis and Y-axis) produces difference on two orthogonal directions of optical fiber at aspects such as shape, diameter or quantity, optical fiber will be inequality at the effective refractive index of X and Y direction so, form higher refractive index contrast, thereby produce higher structural birefringence, light will keep its original polarization state to propagate forward along optical fiber when transmitting in this kind optical fiber.Because the huge refringence contrast that shape difference has been caused in manufacture process is fixed in the microstructured optical fibers, therefore this structural birefringence microstructured optical fibers is especially little to the dependence of using the ambient temperature under the environment, has good temperature polarization stability.Traditional panda type and butterfly junction type polarization maintaining optical fibre belong to the stress type birefringence fiber, and the stress that the stress applying unit produces during variation of ambient temperature also changes around, thereby influence the temperature stability of optical fibre polarization-maintaining performance.And the photonic crystal polarization maintaining optical fibre belongs to structural birefringence, is by quartzy (SiO near two vertical direction the fibre core
2) dutycycle different of glass and air, cause two vertical polarization attitudes that different refractivity and propagation constant are arranged, this birefringent advantage is insensitive to temperature variation.
If in the small unit of combination, to have little glass bar of making of the different dopant material of thermal expansivity (or some polar material) and be placed in the ad-hoc location of optical fiber, will produce certain stress birefrin, thereby strengthen the birefringenct property of microstructured optical fibers.
First kind of birefringence microstructured optical fibers provided by the invention, the structure distribution in its optical fiber cross section is as follows:
Interior zone wherein comprises the silica core district;
The inner cladding zone is formed by quartz material, is positioned at the interior zone periphery, and comprising the internal layer micropore of sub-circular, the internal layer micropore presents the H font around interior zone and distributes, to produce structural birefringence;
The surrounding layer zone is formed by quartz material, is positioned at that inner cladding region is overseas to be enclosed, and comprising the outer micropore of sub-circular, the diameter of outer micropore is greater than the diameter of internal layer micropore;
The internal layer micro-pore diameter is less than or equal to 70% of outer microtube bore dia;
Coating area is made up of organic polymer, is looped around that outer cladding region is overseas to be enclosed.
Second kind of birefringence microstructured optical fibers provided by the invention, the structure distribution in its optical fiber cross section is as follows:
Interior zone wherein comprises the silica core district;
Cladding regions is formed by quartz material, is positioned at the interior zone periphery, and comprising the micropore of approximate ellipsoidal, oval major axis along continuous straight runs is arranged and minor axis is vertically arranged, to produce structural birefringence;
Coating area is made up of organic polymer, is looped around that outer cladding region is overseas to be enclosed.
In the cladding regions of this second kind of optical fiber, the approximate ellipsoidal micropore is distributed in whole cladding regions between interior zone and the coating area.
In the cladding regions of this second kind of optical fiber, the approximate ellipsoidal micropore is distributed in the cladding regions between interior zone and the coating area and is arranged as rectangular array, this rectangular array along the length of oval long axis direction greater than length along oval short-axis direction, micropore is higher than vertical direction along the quantity of rectangular horizontal direction, to strengthen structural birefringence.
The third birefringence microstructured optical fibers provided by the invention, the structure distribution in its optical fiber cross section is as follows:
Interior zone wherein comprises the silica core district;
Cladding regions, form by quartz material, be positioned at the interior zone periphery, micropore comprising sub-circular, the sub-circular micropore is distributed in the cladding regions between interior zone and the coating area and is arranged as rectangular array, the length of the along continuous straight runs of this rectangular array is greater than vertically length, and micropore is higher than vertical direction along the quantity of rectangular horizontal direction, to produce structural birefringence;
Coating area is made up of organic polymer, is looped around that outer cladding region is overseas to be enclosed.
In the interior zone of above-mentioned three kinds of optical fiber of the present invention, can doped germanium or rare earth element in the quartz material in formation silica core district.
In the interior zone of above-mentioned three kinds of optical fiber of the present invention, upper and lower both sides, silica core district can have the stressed zone, are doped with in the quartz material in this stressed zone and the quartz material materials having different thermal expansion coefficient, to produce stress birefrin; The material that the stressed zone mixed is diboron trioxide or other and quartz material materials having different thermal expansion coefficient.
Above-mentioned three kinds of microstructured optical fibers of the present invention have double rotation axes of symmetry at the most.
The invention provides a kind of birefringence microstructured optical fibers manufacture method, this method step:
Quartzy prefabricated rods pure or that mix is drawn into quartzy little rod;
Quartzy prefabricated rods pure or that mix is processed into the hole pipe with circle or oval endoporus, is drawn into the quartz micropores pipe then, formed quartz micropores pipe also has similar circle or similar oval-shaped endoporus;
Little rod of quartz and quartz micropores tube section outline are processed into circle or contour structures such as ellipse or quadrilateral or hexagon;
With the arrange array of shapes such as being combined into rectangle or hexagon polygon of the little rod of quartz and quartz micropores pipe;
Be strapped in the quartz socket tube to form boundling being arranged into quartzy little rod of array and quartz micropores pipe, the combination of perhaps adopting quartzy little rod of bonding agent or anchor clamps clamping and quartz micropores pipe is to form boundling;
The boundling wire drawing that the little rod of quartz and quartz micropores pipe are formed is to produce the microstructured optical fibers that has micropore in the fibre core surrounding layer, control graphite furnace body temperature in the drawing process process, the boundling that had both required little rod of described quartz and quartz micropores pipe to be combined into is melted and has viscosity so that described boundling can be out of shape and be drawn into microstructured optical fibers, require after the fusion viscosity of described boundling material enough big again, in order to avoid the micropore avalanche closure of quartz micropores pipe inside, to control the graphite stove body temperature be about 2150 ℃ for this reason and make the viscosity of described boundling remain on 10
5Handkerchief. second.
The birefringence microstructured optical fibers that the inventive method produces has high birefringenct property, and the representative value of conventional polarization maintaining optical fibre birefringence degree is 4 * 10
-4, and the mode birefringence degree of birefringence microstructured optical fibers of the present invention can reach 10
-2The order of magnitude; Birefringence microstructured optical fibers of the present invention has mainly utilized structural birefringence, therefore has good polarization temperature stability; In addition,, make the effective refractive index of covering present wavelength dependency, make optical fiber of the present invention can in a big way, realize basic mode work because microstructured optical fibers has special cladding structure; Birefringence microstructured optical fibers of the present invention by micro-pore diameter in the suitable increase covering, can make the zero dispersion point move to the shortwave direction, changes micropore packing ratio and position in the covering, can design and control the polarization maintaining optical fibre dispersion characteristics; Owing to utilize quartzy little rod becomes different shape, structure with the flexible permutation and combination of quartz micropores pipe boundling drawing optical fiber again, microstructured optical fibers design freedom height of the present invention, manufacturing process simple and flexible; Microstructured optical fibers manufacture method of the present invention has small investment, instant effect, cost is low, properties of product are good characteristics.
Description of drawings
Fig. 1 represents that the present invention has the birefringence microstructured optical fibers cross sectional representation of similar H font;
Fig. 2 represents to have in the covering of the present invention the birefringence microstructured optical fibers cross sectional representation of oval micropore;
Fig. 3 represents that oval micropore in the covering of the present invention is arranged in the birefringence microstructured optical fibers cross sectional representation of rectangular array;
Fig. 4 represents that circular micropore in the covering of the present invention is arranged in the birefringence microstructured optical fibers cross sectional representation of rectangular array;
The interior zone cross sectional representation that includes fibre core in Fig. 5 presentation graphs 1 to 4 in the birefringence microstructured optical fibers of the present invention.
Embodiment
Explain birefringence microstructured optical fibers structure of the present invention and machining manufacture in detail below in conjunction with accompanying drawing.
Fig. 1 is for having the microstructured optical fibers cross sectional representation of " class H font ", this optical fiber is by the interior zone 1 round fibre core, the less micropore of diameter is formed the cladding regions 2 of " class H font " structure, circular micropore is arranged in the cladding regions 3 of hexagonal array structure, and fibre coating zone 4 compositions of organic polymer composition, it is circular that the micropore 8 in the covering is approximately.Micro-pore diameter in the cladding regions 2 is littler than the micro-pore diameter in the cladding regions 3, and along optical fiber orthogonal axially go up to distribute present " class H font " and distribute, therefore effective refractive index produces bigger difference on the orthogonal direction of optical fiber, thereby forms structural birefringence.
Cladding regions 2 among Fig. 1 is the inner cladding zone, and the cladding regions 3 among the figure is the surrounding layer zone.The micropore in inner cladding zone is called the internal layer micropore, and the micropore in surrounding layer zone is called outer micropore, and the internal layer micro-pore diameter is less than or equal to 70% of outer microtube bore dia.
Fig. 2 is for having the microstructured optical fibers cross sectional representation of oval micropore in the covering, this optical fiber is by the interior zone 1 round fibre core, the cladding regions 3 that oval microwell array is formed, and the fibre coating of being made up of organic polymer zone 4 is formed, it is oval that micropore 8 in the covering is approximately, oval minor axis is parallel to the line direction (being referred to as Y-axis) at fibre core 5 centers and little excellent 6 centers, and long axis of ellipse is along X-direction (perpendicular to Y-axis), and oval microwell array is covered with whole covering.
Fig. 3 is arranged in the microstructured optical fibers cross sectional representation of rectangular array for the oval micropore in the covering, this optical fiber is by the interior zone 1 round fibre core, the cladding regions 3 that oval microwell array is formed, pure quartz glass cladding regions 9, and the fibre coating zone 4 that organic polymer is formed is formed, it is oval that micropore 8 in the covering is approximately, oval minor axis is parallel to the line direction (being referred to as Y-axis) at fibre core 5 centers and little excellent 6 centers, long axis of ellipse is along X-direction (perpendicular to Y-axis), and it is the rectangular array of symcenter that oval micropore is distributed as with the fibre core.
Fig. 4 is arranged in the microstructured optical fibers cross sectional representation of rectangular array for the circular micropore in the covering, the fibre core 5 that this optical fiber is made up of transparent silica glass material, the cladding regions 3 that circular microwell array is formed, pure quartz glass cladding regions 9, and the fibre coating zone 4 that organic polymer is formed is formed, it is circular that micropore 8 is approximately, circular micropore in cladding regions 3 to be distributed as with the fibre core be the rectangular array of symcenter.
Fig. 5 represents that wherein 5 is core region, is made up of transparent silica glass material around the xsect enlarged diagram of the interior zone 1 of fibre core, and the core region material can be pure quartz glass, also can be the quartz material that mixes, and for example mixes germanium or rare earth element; 6 for to be doped with for example boron trioxide material stressed zone different with the quartz glass thermal expansivity, and two stressed zones lay respectively at the core region both sides, to produce additional stress birefrin; Do not needing to produce under the extra-stress birefringence situation, zone 6 also can be pure silica glass material manufacturing; 7 is pure silica glass material.
For manufacturing has the birefringence microstructured optical fibers of the present invention of cross section structure as shown in Figure 1, adopt purity quartz glass pipe for high on wire-drawer-tower, to be drawn into circular quartz micropores pipe and quartzy little rod of different size.With diameter is that 1 stuffed quartz plug of 1.30mm or the stuffed quartz plug of doped germanium or rare earth element, 2 diameters are the B that mixes of 1.10mm
2O
3To be the solid pure quartz glass bar of 1.1mm be combined into zone 1 in Fig. 2 microstructured optical fibers cross sectional representation according to the mode of Fig. 6 for glass bar, 4 diameters.With wall thickness is that 0.50mm and external diameter are the circular quartz micropores pipe of 3.50mm, with external diameter be the circular quartz micropores pipe of 1.10mm for the 3.50mm wall thickness, pack becomes array structure shown in Figure 2, be that the covering micropore forms hexagonal array, cladding regions 2 forms " class H font " structure with core region 1, the array number of plies is 19 layers, bottom is 10 microporous pipe, the middle layer is that 18 microporous pipe are formed with zone 1, with its arrangement and to be fixed on external diameter be in the pure quartz ampoule of 3.00mm for the 73.00mm wall thickness, form the microstructured optical fibers prefabricated rods that possesses double rotation axes of symmetry.Carry out wire drawing on wire-drawing equipment, adjust the graphite stove body temperature in about 2150 ℃, wire drawing becomes the birefringence microstructured optical fibers of predetermined outer diameter.
For manufacturing has the birefringence microstructured optical fibers of the present invention of cross section structure as shown in Figure 2, be that 1 stuffed quartz plug of 2.10mm or the stuffed quartz plug of doped germanium or rare earth element, 2 diameters are the B that mixes of 1.90mm with diameter
2O
3To be the solid pure quartz glass bar of 1.90mm be combined into zone 1 in Fig. 3 microstructured optical fibers cross sectional representation according to the mode of Fig. 6 for glass bar, 4 diameters.With external diameter is the circular quartz micropores pipe of 6.00mm, its endoporus is oval, the major axis of elliptical aperture is 4mm, the minor axis of elliptical aperture is 2.5mm, pack becomes array structure shown in Figure 3, promptly Tuo Yuan minor axis is parallel to the line direction at fibre core 5 centers and little excellent 6 centers, be referred to as Y-axis, long axis of ellipse is along the X-direction perpendicular to Y-axis, oval micropore to be distributed as with the fibre core be the approximate hexagonal array of symcenter, the array number of plies is 11 layers, bottom is 6 microporous pipe, the middle layer is that 10 microporous pipe and interior zone 1 formed, and with its arrangement and to be fixed on external diameter be in the pure quartz ampoule of 3.00mm for the 73.00mm wall thickness, forms the microstructured optical fibers prefabricated rods that possesses double rotation axes of symmetry.Carry out wire drawing on wire-drawing equipment, adjust the graphite stove body temperature in about 2150 ℃, wire drawing becomes the microstructured optical fibers of predetermined outer diameter.
For manufacturing has the birefringence microstructured optical fibers of the present invention of cross section structure as shown in Figure 3, be that 1 stuffed quartz plug of 2.10mm or the stuffed quartz plug of doped germanium or rare earth element, 2 diameters are the B that mixes of 1.90mm with diameter
2O
3To be the solid pure quartz glass bar of 1.90mm be combined into zone 1 in Fig. 4 microstructured optical fibers cross sectional representation according to the mode of Fig. 6 for glass bar, 4 diameters.With external diameter is the circular quartz micropores pipe of 6.00mm, its endoporus is oval, the major axis of elliptical aperture is 4mm, the minor axis of elliptical aperture is 2.5mm, pack becomes array structure shown in Figure 3, promptly Tuo Yuan minor axis is parallel to the line direction at fibre core 5 centers and little excellent 6 centers, be referred to as Y-axis, long axis of ellipse is along the X-direction perpendicular to Y-axis, oval micropore to be distributed as with the fibre core be the rectangular array of symcenter, the array number of plies is 7 layers, the middle layer is that 8 microporous pipe and interior zone 1 are formed, all the other 6 layers are 9 microporous pipe, with its arrangement and to be fixed on external diameter be in the pure quartz ampoule of 3.00mm for the 73.00mm wall thickness, suitably fill the little rod of stuffed quartz between rectangular array and the quartz ampoule to form pure silica cladding 9.Carry out wire drawing on wire-drawing equipment, adjust the graphite stove body temperature in about 2150 ℃, wire drawing becomes the microstructured optical fibers of predetermined outer diameter.
For manufacturing has the birefringence microstructured optical fibers of the present invention of cross section structure as shown in Figure 4, be that 1 stuffed quartz plug of 2.10mm or the stuffed quartz plug of doped germanium or rare earth element, 2 diameters are the B that mixes of 1.90mm with diameter
2O
3To be the solid pure quartz glass bar of 1.90mm be combined into zone 1 in Fig. 4 microstructured optical fibers cross sectional representation according to the mode of Fig. 6 for glass bar, 4 diameters.With external diameter is the circular quartz micropores pipe of 6.00mm, its endoporus is circular, Circularhole diameter is 3mm, pack becomes rectangular array structure shown in Figure 4, circular micropore to be distributed as with the fibre core be the rectangular array of symcenter, the array number of plies is 7 layers, the middle layer is that 8 microporous pipe and interior zone 1 are formed, all the other 6 layers are 9 microporous pipe, with its arrangement and to be fixed on external diameter be in the pure quartz ampoule of 3.00mm for the 73.00mm wall thickness, suitably fill the little rod of stuffed quartz between rectangular array and the quartz ampoule to form pure silica cladding 9, form the microstructured optical fibers prefabricated rods that possesses double rotation axes of symmetry.Carry out wire drawing on wire-drawing equipment, adjust the graphite stove body temperature in about 2150 ℃, wire drawing becomes the microstructured optical fibers of predetermined outer diameter.Do not have the structure that has among Fig. 4, and interior zone 1 in fact embodiment illustrated in fig. 4 has concrete structure same as shown in Figure 5 as the detailed drafting interior zone 1 of Fig. 1 to 3.
For convenience little rod of quartz and quartz micropores pipe array shape are as required arranged, the outline of little rod of above-mentioned quartz and quartz micropores tube section can also be processed into shapes such as ellipse, rectangle, quadrilateral, hexagon and other polygon except circle.
Above-mentioned accompanying drawing only is an explanatory view, protection scope of the present invention is not formed restriction.
Claims (7)
1. birefringence microstructured optical fibers, the structure distribution in its optical fiber cross section is as follows:
Interior zone wherein comprises the silica core district;
The inner cladding zone is formed by quartz material, is positioned at the interior zone periphery, and comprising the internal layer micropore of circle, the internal layer micropore presents the H font around interior zone and distributes, to produce structural birefringence;
The surrounding layer zone is formed by quartz material, is positioned at that inner cladding region is overseas to be enclosed, comprising the outer micropore of circle;
The internal layer micro-pore diameter is less than or equal to 70% of outer microtube bore dia;
Coating area is made up of organic polymer, is looped around that outer cladding region is overseas to be enclosed.
2. birefringence microstructured optical fibers, the structure distribution in its optical fiber cross section is as follows:
Interior zone wherein comprises the silica core district;
Cladding regions is formed by quartz material, is positioned at the interior zone periphery, and comprising oval-shaped micropore, oval major axis along continuous straight runs is arranged and minor axis is vertically arranged;
It is characterized in that:
Oval micropore is distributed in the cladding regions between interior zone and the coating area and is arranged as rectangular array, this rectangular array along the length of oval long axis direction greater than length along oval short-axis direction, micropore along the quantity of rectangular horizontal direction more than vertical direction, to produce structural birefringence;
Coating area is made up of organic polymer, is looped around the cladding regions periphery;
Oval micropore is distributed in whole cladding regions between interior zone and the coating area, and the minor axis length of oval micropore is less than or equal to 62.5% of long axis length.
3. birefringence microstructured optical fibers, the structure distribution in its optical fiber cross section is as follows:
Interior zone wherein comprises the silica core district;
Cladding regions, form by quartz material, be positioned at the interior zone periphery, micropore comprising circle, circular micropore is distributed in the cladding regions between interior zone and the coating area and is arranged as rectangular array, the length of the along continuous straight runs of this rectangular array is greater than vertically length, micropore along the quantity of rectangular horizontal direction more than vertical direction, to produce structural birefringence;
Coating area is made up of organic polymer, is looped around the cladding regions periphery.
4. according to claim 1,2, one of 3 birefringence microstructured optical fibers, it is characterized in that in the interior zone of this described optical fiber, but form doped germanium or rare earth element in the quartz material in silica core district.
5. according to claim 1,2, one of 3 birefringence microstructured optical fibers, it is characterized in that in the interior zone of this described optical fiber, upper and lower both sides, silica core district have the stressed zone, be doped with in the quartz material in this stressed zone and the quartz material materials having different thermal expansion coefficient, to produce stress birefrin.
6. method that is used to make the described birefringence microstructured optical fibers of one of claim 1 to 4, the method comprising the steps of:
Quartzy prefabricated rods pure or that mix is drawn into quartzy little rod;
Pure quartzy prefabricated rods is processed into the hole pipe with circle or oval endoporus, is drawn into the quartz micropores pipe then, formed quartz micropores pipe also has circular or oval-shaped endoporus;
The little rod of quartz and quartz micropores pipe be processed into have circle or ellipse or quadrilateral or hexagonal cross-section;
With the arrange array of shapes such as being combined into rectangle or hexagon of the little rod of quartz and quartz micropores pipe;
Be strapped in the quartz socket tube to form boundling being arranged into quartzy little rod of array and quartz micropores pipe, the combination of perhaps adopting quartzy little rod of bonding agent or anchor clamps clamping and quartz micropores pipe is to form boundling;
The boundling wire drawing that the little rod of quartz and quartz micropores pipe are formed is to produce the microstructured optical fibers that has micropore in the fibre core covering, control graphite furnace body temperature in the drawing process process, the boundling that had both required little rod of described quartz and quartz micropores pipe to be combined into is melted and has viscosity so that described boundling can be out of shape and be drawn into microstructured optical fibers, require after the fusion viscosity of described boundling material enough big again, in order to avoid the micropore avalanche closure of quartz micropores pipe inside, to control the graphite stove body temperature be 2150 ℃ for this reason and make the viscosity of described boundling remain on 10
5Handkerchief second.
7. method that is used to make the described birefringence microstructured optical fibers of claim 5, the method comprising the steps of:
Quartzy prefabricated rods pure or that mix is drawn into quartzy little rod;
Pure quartzy prefabricated rods is processed into the hole pipe with circle or oval endoporus, is drawn into the quartz micropores pipe then, formed quartz micropores pipe also has circular or oval-shaped endoporus;
The little rod of quartz and quartz micropores pipe be processed into have circle or ellipse or quadrilateral or hexagonal cross-section;
With the arrange array of shapes such as being combined into rectangle or hexagon of the little rod of quartz and quartz micropores pipe;
Be strapped in the quartz socket tube to form boundling being arranged into quartzy little rod of array and quartz micropores pipe, the combination of perhaps adopting quartzy little rod of bonding agent or anchor clamps clamping and quartz micropores pipe is to form boundling;
The boundling wire drawing that the little rod of quartz and quartz micropores pipe are formed is to produce the microstructured optical fibers that has micropore in the fibre core covering, control graphite furnace body temperature in the drawing process process, the boundling that had both required little rod of described quartz and quartz micropores pipe to be combined into is melted and has viscosity so that described boundling can be out of shape and be drawn into microstructured optical fibers, require after the fusion viscosity of described boundling material enough big again, in order to avoid the micropore avalanche closure of quartz micropores pipe inside, to control the graphite stove body temperature be 2150 ℃ for this reason and make the viscosity of described boundling remain on 10
5Handkerchief second;
It is characterized in that: doped germanium or rare earth element in the quartzy prefabricated rods of formation core region, diboron trioxide mixes in the quartzy prefabricated rods of formation stressed zone, be drawn into then and be the little rod of quartz, when being combined to form quartzy little rod and quartz micropores pipe boundling, a quartzy little rod that forms the doping diboron trioxide of stressed zone is respectively arranged in the germanium or the little excellent both sides of rare earth doped quartz that form core region.
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| CN 200410030660 CN1291254C (en) | 2004-04-02 | 2004-04-02 | Double-refraction microstructure optical fiber and its mfg. method |
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| CN 200410030660 CN1291254C (en) | 2004-04-02 | 2004-04-02 | Double-refraction microstructure optical fiber and its mfg. method |
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| CN1291254C true CN1291254C (en) | 2006-12-20 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322344C (en) * | 2005-01-26 | 2007-06-20 | 浙江工业大学 | Double refraction photo crystal optical fiber |
| CN101881853B (en) * | 2009-05-06 | 2014-09-24 | 北京中视中科光电技术有限公司 | Optical fiber used for eliminating laser coherence |
| CN102096145B (en) * | 2010-12-31 | 2012-11-07 | 北京交通大学 | Multi-core polarization maintaining fiber and manufacturing method thereof |
| CN102555108B (en) * | 2012-01-31 | 2015-10-28 | 南京春辉科技实业有限公司 | A kind of making mould of special-shape micro-fine optical fiber bundle and preparation method |
| CN102866456A (en) * | 2012-10-09 | 2013-01-09 | 天津理工大学 | High-birefringence photonic crystal optical fiber low in limit loss |
| CN104678488B (en) * | 2015-01-30 | 2017-08-29 | 燕山大学 | A kind of double-ring fibre core photonic crystal fiber for being used to produce bottle beams |
| GB201700936D0 (en) | 2017-01-19 | 2017-03-08 | Univ Bath | Optical fibre apparatus and method |
| CN109669233A (en) * | 2019-02-25 | 2019-04-23 | 宝鸡文理学院 | Fill the rectangular lattice photonic crystal fiber wavelength multiplexer/demultiplexer of benzene |
| CN111431022A (en) * | 2020-03-04 | 2020-07-17 | 深圳市欧凌镭射科技有限公司 | Optical fiber amplifier and laser generator |
| CN111977959B (en) * | 2020-08-25 | 2021-10-22 | 东北大学 | V-shaped high birefringent microstructure optical fiber with air hole size controlled by air pressure and manufacturing method thereof |
| CN111977958B (en) * | 2020-08-25 | 2021-10-22 | 东北大学 | Panda-shaped micro-structure optical fiber with oval core filled with silver wires and preparation method thereof |
| CN113376735B (en) * | 2021-06-29 | 2022-07-01 | 西安邮电大学 | Chinese knot-like porous fiber core ultrahigh birefringence terahertz optical fiber |
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