CN1296735C - Dispersed flat photon crystal fiber - Google Patents
Dispersed flat photon crystal fiber Download PDFInfo
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- CN1296735C CN1296735C CNB2004100920005A CN200410092000A CN1296735C CN 1296735 C CN1296735 C CN 1296735C CN B2004100920005 A CNB2004100920005 A CN B2004100920005A CN 200410092000 A CN200410092000 A CN 200410092000A CN 1296735 C CN1296735 C CN 1296735C
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- airports
- airport
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- fiber core
- photon crystal
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- 239000000835 fiber Substances 0.000 title claims abstract description 38
- 239000013078 crystal Substances 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims abstract description 16
- 238000005253 cladding Methods 0.000 claims abstract description 7
- 239000011521 glass Substances 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 abstract description 18
- 230000009022 nonlinear effect Effects 0.000 abstract description 4
- 241000533950 Leucojum Species 0.000 abstract 1
- 239000004038 photonic crystal Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The present invention relates to a chromatic dispersion flat photon crystal optical fiber, which comprises a fiber core and a cladding layer. Airports, which are uniformly distributed and arranged in a structure of a regular triangle, are arranged on background materials of the optical fiber. The present invention is characterized in that the airports of which the fiber core is composed are arranged in a shape of a snowflake in the background materials; the diameters of the airports of which a fiber core region is composed are shorter than the diameters of the airports of which a cladding layer region is formed; the duty ratio of the airports in the fiber core region is smaller than the duty ratio of the cladding layer region; the fiber core is composed of thirteen airports. Under the condition of determinate intervals of the airports, the present invention can realize positive, zero and negative chromatic dispersion flat type fibers in a wide band range just by changing the sizes of the airports in the fiber core region, with large mode field areas and small nonlinear effects of the fiber.
Description
(1) technical field
The present invention relates to a kind of photonic crystal fiber, the photonic crystal fiber that particularly a kind of broadband scope internal dispersion is smooth, mode field area is bigger.
(2) background technology
Photonic crystal fiber is called porous optical fiber or microstructured optical fibers again.On fiber end face, regularly arranged many air apertures are elongation vertically in background material, at air aperture of the center of optical fiber disappearance, forms the fibre core of leaded light, and the evenly distributed formation covering of peripheral air hole in background material.Fiber core refractive index is greater than covering, and this class photonic crystal fiber is to carry out leaded light by the principle of total internal reflection, and the optical mode field is limited to the central defect position substantially.By changing covering hollow pore opening and pitch of holes size, can the various dispersion characteristics of flexible design, wherein dispersed flat photon crystal fiber is used very extensive in wavelength-division multiplex system.Adopt the double clad technology, promptly suitably reduce to be close to a circle in the covering of fibre core or a few airport sizes and can realize dispersion flattene in the broad wavelength band, but the size of the airport in the interior surrounding layer influences dispersion characteristics jointly, design dispersed flat photon crystal fiber, need to regulate two parameters, therefore be necessary to inquire into more easy design.
(3) summary of the invention
The objective of the invention is the photonic crystal fiber of realizing that broadband scope internal dispersion is smooth, mode field area is bigger.
For this reason, the present invention takes following technical scheme:
A kind of photonic crystal fiber, comprise fibre core and covering, on the background material of optical fiber, be provided with the airport that is the uniform arrangement of equilateral triangle structure, the airport that it is characterized in that constituting fibre core is centered around and is flakes in the background material and arranges, the airport diameter that constitutes core region is littler than the airport diameter that constitutes cladding regions, and the airport dutycycle of core region is less than the dutycycle of cladding regions.
Further, the airport of formation fibre core is 13.
Further, the optical fiber background material is the silex glass material; Perhaps: the optical fiber background material is a polymeric material.
Advantage of the present invention is: under the condition that the airport spacing is determined, only need to change the airport size of core region, just can in broadband scope very, just realize, zero and negative dispersion flattened fiber, and mode field area is bigger, the nonlinear effect of optical fiber is less.
Optical fiber provided by the invention can be applicable to the transmission system of wavelength-division multiplex, makes the dispersion parameters of each interchannel basic identical, and bigger mode field area has also suitably reduced the nonlinear effect in the transmission course simultaneously.
(4) description of drawings
Fig. 1 is the cross sectional representation of one embodiment of the invention;
Fig. 2 is the mould field pattern of Fig. 1 example;
Fig. 3 is five kinds of dispersion curve values that the core region airport obtains when getting five eigenwerts.
(5) embodiment
Embodiment one:
With reference to accompanying drawing 1-3, a kind of photonic crystal fiber comprises fibre core and covering, selecting quartz is background material 2, on the whole end face of optical fiber, and a kind of periodic arrangement that adopts the present technique field to generally acknowledge, promptly as shown in Figure 1, equilateral triangle of every three adjacent airports, 1 continuous formation.13 airports that are the flakes distribution in the end face central area are less than other airports, thereby there are less airport dutycycle and bigger refractive index in this zone, constitutes fibre core, is the leaded light zone of optical fiber, be subjected to the influence of core shape, mould field shape also is the flakes distribution as shown in Figure 2.In addition, fibre core is to center on the zone that forms by 13 less airports, and area is bigger, and the mode field area of qualification is also relatively large, can reduce the nonlinear effect of optical fiber.Outer peripheral areas is made of the uniform arrangement of bigger airport in background material, because of the airport dutycycle greater than core region, refractive index is slightly less than core region, forms covering.
When airport spacing Λ=2.3 microns (whole fiber end face), the diameter of 13 airports of core region is d
2In the time of=0.4 micron, as shown in Figure 3, in 1.4～1.7 microns 300 nanometer wavelength range, dispersion parameters is from-9.4～-11 ps/nm/kilometers; The airport spacing is constant, and core region airport diameter is changed into d
2In the time of=0.29 micron, as shown in Figure 3, in 1.4～1.7 microns 300 nanometer wavelength range, dispersion parameters is from-0.650.15 ps/nm/kilometer; d
2In the time of=0.28 micron, as shown in Figure 3, dispersion parameters is from 0.2～0.7 ps/nm/kilometer; If it is d that 13 airports of core region lack fully
2In the time of=0 micron, as shown in Figure 3, dispersion parameters is from 13.8～12.9 ps/nm/kilometers.In the present embodiment, when the airport spacing is determined, only need change the airport size of the core region that is the flakes arrangement, realize smooth negative dispersion, smooth nearly zero little negative dispersion, smooth nearly zero little positive dispersion and smooth positive dispersion.
Embodiment two:
Background material 2 is a polymeric material, and other condition is with embodiment one.
Claims (4)
1. dispersed flat photon crystal fiber, comprise fibre core and covering, on the background material of optical fiber, be provided with the airport that is the uniform arrangement of equilateral triangle structure, the airport that it is characterized in that constituting fibre core is centered around and is flakes in the background material and arranges, the airport diameter that constitutes core region is littler than the airport diameter that constitutes cladding regions, and the airport dutycycle of core region is less than the dutycycle of cladding regions.
2. dispersed flat photon crystal fiber as claimed in claim 1, the airport that it is characterized in that constituting fibre core is 13.
3. dispersed flat photon crystal fiber as claimed in claim 1 or 2 is characterized in that the optical fiber background material is the silex glass material.
4. dispersed flat photon crystal fiber as claimed in claim 1 or 2 is characterized in that the optical fiber background material is a polymeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100920005A CN1296735C (en) | 2004-12-29 | 2004-12-29 | Dispersed flat photon crystal fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100920005A CN1296735C (en) | 2004-12-29 | 2004-12-29 | Dispersed flat photon crystal fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632631A CN1632631A (en) | 2005-06-29 |
| CN1296735C true CN1296735C (en) | 2007-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100920005A Expired - Fee Related CN1296735C (en) | 2004-12-29 | 2004-12-29 | Dispersed flat photon crystal fiber |
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| CN (1) | CN1296735C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345588B (en) * | 2008-08-26 | 2011-05-04 | 中国科学院上海微系统与信息技术研究所 | Method for implementing optical bullet propagation without time-space stretching by using photon crystal |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490820B (en) * | 2017-10-13 | 2020-02-25 | 燕山大学 | All-solid-state large-mode-area near-zero dispersion flat microstructure optical fiber |
| CN109596573B (en) * | 2018-12-18 | 2021-02-26 | 华北水利水电大学 | Novel D-type structure photonic crystal fiber sensor based on surface plasma resonance |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002084350A1 (en) * | 2001-04-11 | 2002-10-24 | Crystal Fibre A/S | Dual core photonic crystal fibers (pcf) with special dispersion properties |
| CN1396467A (en) * | 2002-05-18 | 2003-02-12 | 哈尔滨工程大学 | Hollow optical fibre of photon coystal plastics and its preparing process |
| CN1588141A (en) * | 2004-08-06 | 2005-03-02 | 上海大学 | Photon crystal optical fiber |
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2004
- 2004-12-29 CN CNB2004100920005A patent/CN1296735C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002084350A1 (en) * | 2001-04-11 | 2002-10-24 | Crystal Fibre A/S | Dual core photonic crystal fibers (pcf) with special dispersion properties |
| CN1396467A (en) * | 2002-05-18 | 2003-02-12 | 哈尔滨工程大学 | Hollow optical fibre of photon coystal plastics and its preparing process |
| CN1588141A (en) * | 2004-08-06 | 2005-03-02 | 上海大学 | Photon crystal optical fiber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345588B (en) * | 2008-08-26 | 2011-05-04 | 中国科学院上海微系统与信息技术研究所 | Method for implementing optical bullet propagation without time-space stretching by using photon crystal |
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| CN1632631A (en) | 2005-06-29 |
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