CN1588141A - Photon crystal optical fiber - Google Patents
Photon crystal optical fiber Download PDFInfo
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- CN1588141A CN1588141A CNA2004100535417A CN200410053541A CN1588141A CN 1588141 A CN1588141 A CN 1588141A CN A2004100535417 A CNA2004100535417 A CN A2004100535417A CN 200410053541 A CN200410053541 A CN 200410053541A CN 1588141 A CN1588141 A CN 1588141A
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Abstract
The invention relates to a photon crystal optical fiber, containing a fiber core and a coat, and its characteristic: the fiber core is a central solid region of optical-fiber background material; the coat is a region around the fiber core and has uniformly distributed air holes at the periphery, the air holes are periodically arranged in the optical-fiber background material, i.e. every three adjacent air holes compose a regular triangle; several circles of air holes in the coat, near to the fiber core, compose an inner coat in a band-shaped region arranged of regular hexagons in the optical-fiber background material, and the rest compose an outer coat in an annular region arranged periodically in the optical-fiber background material; the air holes in the inner coat are smaller than those in the outer coat. The optical fiber provided by the invention can realize relatively flat dispersivity in a very broad wavelength range. It is applied to make various optical devices and can act as a transmission optical fiber for use.
Description
Technical field:
The present invention relates to a kind of photonic crystal fiber, particularly a kind of at the smooth photonic crystal fiber of very wide wavelength coverage internal dispersion.
Technical background:
Over past ten years, photonic crystal fiber has the fervent concern that many excellent characteristic are subjected to whole world scientists because of it.Photonic crystal fiber is called porous optical fiber or microstructured optical fibers again, the refractive index that is characterized in covering is subjected to wavelength magnitude and periodically modulates, this modulation generally realizes that by the airport of introducing elongation vertically in silex glass fiber cores has been destroyed the periodic defective of index modulation by one and constituted.With respect to the effective refractive index of covering, if fibre core is made of low-index material (as air), this optical fiber is by band gap principle leaded light, and it requires strict arrangement of airport in the covering.The fiber core refractive index of another kind of photonic crystal fiber is higher, therefore just can realize the conduction of light by total internal reflection, and this type optical fiber is not very accurate to the periodic arrangement requirement of airport in the covering, therefore makes than being easier to.
Photonic crystal fiber has many good characteristics that are different from traditional fiber, as: can realize single mode transport (single mode ceaselessly) at any wavelength, control CHROMATIC DISPERSION IN FIBER OPTICS and mode field area flexibly by changing airport and the big I of pitch of holes, can realize very weak or very strong nonlinear effect.In addition, the asymmetry of arranging by airport can realize very high birefringent characteristic.But change airport and pitch of holes size, can only in narrower and small wavelength coverage, make chromatic dispersion-wavelength curve more smooth.
These good characteristics of photonic crystal fiber make it send out very big effect at optical communication field, utilize the high-dispersive photonic crystal fiber can carry out dispersion compensation, utilize strong nonlinearity or strong double refraction photo crystal optical fiber can make various optical devices, especially the raising of manufacturing technology has reduced fibre loss gradually, it might be used as Transmission Fibers, therefore be necessary very much to develop the photonic crystal fiber of wide wavelength coverage dispersion flattene for the requirement in the adaptation wdm system.
Summary of the invention:
The object of the present invention is to provide a kind of photonic crystal fiber that can in very wide wavelength coverage, realize dispersion flattene.
For achieving the above object, the present invention adopts following technical proposals:
A kind of photonic crystal fiber comprises fibre core and covering, it is characterized in that fibre core is the center solid area of optical fiber background material; Covering is the zone of the peripheral uniform airport of encirclement fibre core, and airport is periodic arrangement in the optical fiber background material, and promptly every three adjacent airports constitute an equilateral triangle; Arrange the belt-like zone that surrounds near the regular hexagon of some circle airports in the optical fiber background material of fibre core in the covering and constitute inner cladding, all the other constitute surrounding layer apart from the annular region that the fibre core periodic arrangement of airport in the optical fiber background material far away surrounds; Airport in the inner cladding is less than the airport of surrounding layer.
The number of turns that the airport of above-mentioned inner cladding is arranged is the 1-4 circle.
Above-mentioned inner cladding airport diameter (d
1) and surrounding layer airport diameter (d
2) ratio (d
1/ d
2) be 0.1-0.9.
Above-mentioned inner cladding airport diameter (d
1) and surrounding layer airport diameter (d
2) ratio (d
1/ d
2) be 0.2-0.5.
Above-mentioned optical fiber background material is silex glass material or polymeric material.
The present invention compares with present technology has conspicuous substantive distinguishing features and advantage: the inner cladding airport among the present invention is littler than surrounding layer airport, can realize the smooth chromatic dispersion in the very wide wavelength coverage.Optical fiber provided by the invention is applicable to the various optical devices of making and uses as Transmission Fibers.
Description of drawings:
Fig. 1 is that the cross-sectional view core of one embodiment of the present of invention is the structural representation in calculation window district.
Fig. 2 is the mould field pattern of Fig. 1 example.
Fig. 3 is the dispersion curve figure of Fig. 1 example.
Embodiment:
A preferred embodiment of the present invention is: referring to Fig. 1, Fig. 2 and Fig. 3, fiber core has an airport disappearance (silicon dioxide is solid) to form the leaded light zone, its periphery surrounds inner cladding by six less airports 1 in background silicon glass 3, the periodic arrangement of other bigger airport 2 in background silicon glass 3 forms surrounding layer.A kind of periodic arrangement that adopts the present technique field to generally acknowledge, promptly as shown in Figure 1, every adjacent three airports 1 or 2 constitute an equilateral triangle, and the distribution of mould field is as shown in Figure 2.Surrounding layer hollow hole diameter d
2Be 1.035 microns, airport spacing Λ is 2.3 microns, when inner cladding airport diameter d
1Identical with surrounding layer promptly 1.035 microns the time, in 1.0 microns～2.0 microns wavelength coverage, CHROMATIC DISPERSION IN FIBER OPTICS changes in the scope of 40～-30 about 70 ps/nm/kilometers, inner cladding airport diameter d
1When reducing gradually, can cause the high-end decline of dispersion curve, low side rises, when inner cladding airport diameter d
1When narrowing down to 0.3 micron, in the bandwidth of 1000 nanometers, dispersion curve is a horizontal line that almost maintains 10 ps/nm/kilometers, has really realized the dispersion flattene in the wide wavelength coverage.But d
1When continuing to narrow down to 0.2 micron, dispersion curve is the rising variation tendency on the contrary in the wavelength coverage of 1.0-2.0 micron.(best d in this example when as seen, reducing inner cladding airport size to an optimum value
1Be 0.3 micron) can realize the broadband dispersion flattene.
Claims (5)
1. a photonic crystal fiber comprises fibre core and covering, it is characterized in that fibre core is the center solid area of optical fiber background material; Covering is the zone of the peripheral uniform airport (1,2) of encirclement fibre core, and airport (1,2) is periodic arrangement in optical fiber background material (3), and promptly every adjacent three airports (1,2) constitute an equilateral triangle; Arrange the belt-like zone that surrounds near the regular hexagon of some circle airports (1) in optical fiber background material (3) of fibre core in the covering and constitute inner cladding, all the other constitute surrounding layer apart from the annular region that the periodic arrangement of fibre core airport far away (2) in optical fiber background material (3) surrounds; Airport in the inner cladding (1) is less than the airport (2) of surrounding layer.
2. photonic crystal fiber according to claim 1, the number of turns that it is characterized in that airport (1) arrangement of inner cladding is the 1-4 circle.
3. photonic crystal fiber according to claim 1 and 2 is characterized in that inner cladding airport (1) diameter (d
1) and surrounding layer airport (2) diameter (d
2) ratio (d
1/ d
2) be 0.1-0.9.
4. photonic crystal fiber according to claim 3 is characterized in that inner cladding airport (1) diameter (d
1) and surrounding layer airport (2) diameter (d
2) ratio (d
1/ d
2) be 0.2-0.5.
5. photonic crystal fiber according to claim 1 is characterized in that optical fiber background material (3) is silex glass material or polymeric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100535417A CN1588141A (en) | 2004-08-06 | 2004-08-06 | Photon crystal optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100535417A CN1588141A (en) | 2004-08-06 | 2004-08-06 | Photon crystal optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1588141A true CN1588141A (en) | 2005-03-02 |
Family
ID=34602909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100535417A Pending CN1588141A (en) | 2004-08-06 | 2004-08-06 | Photon crystal optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1588141A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294431C (en) * | 2004-12-03 | 2007-01-10 | 浙江工业大学 | Photon crystal fiber |
| CN1296735C (en) * | 2004-12-29 | 2007-01-24 | 浙江工业大学 | Dispersed flat photon crystal fiber |
| CN1299137C (en) * | 2005-04-15 | 2007-02-07 | 清华大学 | Large chromatic dispersion Bragg type photonic crystal fiber |
| CN1304860C (en) * | 2005-04-15 | 2007-03-14 | 清华大学 | Large mode field area large chromatic dispersion photonic crystal fiber |
| CN107632337A (en) * | 2017-10-25 | 2018-01-26 | 中国地质大学（武汉） | A kind of tellurate Group-velocity Matching photonic crystal fiber |
| CN108333670A (en) * | 2018-05-04 | 2018-07-27 | 中国电子科技集团公司第四十六研究所 | A kind of active microstructured optical fibers of aperiodicity coarse pitch single mode |
| CN109343171A (en) * | 2018-11-29 | 2019-02-15 | 中国地质大学（武汉） | A kind of ZBLAN fluoride ultraflattened dispersion compensation photonic crystal fiber |
| CN112363269A (en) * | 2020-12-11 | 2021-02-12 | 东北石油大学 | High-birefringence low-limiting-loss photonic quasicrystal optical fiber |
| CN114035264A (en) * | 2021-11-18 | 2022-02-11 | 燕山大学 | Dispersion compensation microstructure optical fiber |
-
2004
- 2004-08-06 CN CNA2004100535417A patent/CN1588141A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294431C (en) * | 2004-12-03 | 2007-01-10 | 浙江工业大学 | Photon crystal fiber |
| CN1296735C (en) * | 2004-12-29 | 2007-01-24 | 浙江工业大学 | Dispersed flat photon crystal fiber |
| CN1299137C (en) * | 2005-04-15 | 2007-02-07 | 清华大学 | Large chromatic dispersion Bragg type photonic crystal fiber |
| CN1304860C (en) * | 2005-04-15 | 2007-03-14 | 清华大学 | Large mode field area large chromatic dispersion photonic crystal fiber |
| CN107632337A (en) * | 2017-10-25 | 2018-01-26 | 中国地质大学（武汉） | A kind of tellurate Group-velocity Matching photonic crystal fiber |
| CN108333670A (en) * | 2018-05-04 | 2018-07-27 | 中国电子科技集团公司第四十六研究所 | A kind of active microstructured optical fibers of aperiodicity coarse pitch single mode |
| CN109343171A (en) * | 2018-11-29 | 2019-02-15 | 中国地质大学（武汉） | A kind of ZBLAN fluoride ultraflattened dispersion compensation photonic crystal fiber |
| CN112363269A (en) * | 2020-12-11 | 2021-02-12 | 东北石油大学 | High-birefringence low-limiting-loss photonic quasicrystal optical fiber |
| CN114035264A (en) * | 2021-11-18 | 2022-02-11 | 燕山大学 | Dispersion compensation microstructure optical fiber |
| CN114035264B (en) * | 2021-11-18 | 2022-06-17 | 燕山大学 | Dispersion compensation microstructure optical fiber |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |