CN105445852B - Zero dispersion is displaced photonic crystal fiber - Google Patents
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- CN105445852B CN105445852B CN201610011288.1A CN201610011288A CN105445852B CN 105445852 B CN105445852 B CN 105445852B CN 201610011288 A CN201610011288 A CN 201610011288A CN 105445852 B CN105445852 B CN 105445852B
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- 239000006185 dispersion Substances 0.000 title claims abstract description 50
- 239000000835 fiber Substances 0.000 title claims abstract description 49
- 239000004038 photonic crystal Substances 0.000 title claims abstract description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000013307 optical fiber Substances 0.000 claims abstract description 39
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 9
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920001721 polyimide Polymers 0.000 claims description 6
- 239000009719 polyimide resin Substances 0.000 claims description 6
- 230000005405 multipole Effects 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 5
- 238000010183 spectrum analysis Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 235000008434 ginseng Nutrition 0.000 description 3
- 230000009022 nonlinear effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02214—Optical fibres with cladding with or without a coating tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened
- G02B6/02219—Characterised by the wavelength dispersion properties in the silica low loss window around 1550 nm, i.e. S, C, L and U bands from 1460-1675 nm
- G02B6/02228—Dispersion flattened fibres, i.e. having a low dispersion variation over an extended wavelength range
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
- G02B6/02366—Single ring of structures, e.g. "air clad"
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Lasers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses a kind of zero dispersions to be displaced photonic crystal fiber, is related to photonic crystal fiber field.The optical fiber includes silica core, the multi-layer air hole toroidal ring structure being looped around around silica core, the silica clad being coated on outside the toroidal ring structure of multi-layer air hole, and the diameter of silica core is 3.2~5.0 μm；Air hole number=ring number of plies * 6 in the toroidal ring structure of multi-layer air hole, the internal diameter of all airports is all the same, the internal diameter of each airport is 2.0~4.0 μm, and the spacing between adjacent airport is 0.5~1.5 μm, and the airport of every layer of ring is arranged in regular hexagon；The diameter of silica clad is 110~175 μm.The optical fiber can be used in developing parameter amplifier and parametric oscillator with high performance, realizes good 1 micron waveband Special Nonlinear application effect, obtains the non-traditional wave band high power laser light for bio-imaging and spectrum analysis.
Description
Technical field
The present invention relates to photonic crystal fiber fields, are specifically related to a kind of zero dispersion displacement photonic crystal fiber.
Background technique
Short wavelength optical fiber parameter amplifier and parametric oscillator based on 1064nm pumping can be used for biomedical imaging
And spectrum analysis, it is with important application prospects, however lack work in conventional laser in the light source of this wave band.Based on light
The parameter amplifier and parametric oscillator of photonic crystal fiber can use the nonlinear effect of optical fiber, will work in conventional laser
Laser energy in particular wavelength region is transformed into new wavelength region, to generate work in this new wavelength region
Laser.
Parametric oscillator can obtain tunable laser output at new wavelength, mainly utilize the parameter four in optical fiber
Wave mixing process provides gain, repeatedly feeds back to gain light with the new wavelength components that the structure of oscillation chamber generates gain
Fibre reaches balance and stability and forms oscillation output.The height of the energy conversion efficiency of parametric oscillator directly decides its application
The width of range, and can finally obtain the marketization.Early in 1975, R.H.Stolen was just proved and is arrived, using in optical fiber
Parametric process can efficiently convert strong optical pumping energy to the new wavelength of signal and ideler frequency for meeting phase matched in a fiber
Place.In order to improve the energy conversion efficiency of Fiber-optic parameter oscillator, the work of many explorations is had also been made in people.
Parameter amplifying technique based on photonic crystal fiber can effectively improve the energy conversion efficiency of parametric oscillator, tool
There is good application prospect.The parameter of optical fiber amplifies the dispersion characteristics to optical fiber, and specifically zero-dispersion wavelength is especially sensitive.If
Optical wavelength into optical fiber is exactly near the zero-dispersion wavelength of optical fiber, and the optical fiber will have very strong four-wave mixing etc. at this time
Nonlinear effect, so that good parameter amplification can be realized.Therefore, with the photonic crystal fiber pair of suitable zero-dispersion wavelength
Developing has the parametric oscillator of superperformance very crucial.
Summary of the invention
The purpose of the invention is to overcome the shortcomings of above-mentioned background technique, a kind of zero dispersion displacement photonic crystal light is provided
Fibre, the optical fiber can be used in developing parameter amplifier and parametric oscillator with high performance, realize that good 1 micron waveband is special
Different nonlinear application effect, obtains the non-traditional wave band high power laser light for bio-imaging and spectrum analysis.
The present invention provides a kind of zero dispersion displacement photonic crystal fiber, including silica core, is looped around around silica core
Multi-layer air hole toroidal ring structure, the silica clad that is coated on outside the toroidal ring structure of multi-layer air hole, the diameter of the silica core
It is 3.2~5.0 μm；Air hole number=ring number of plies * 6 in the toroidal ring structure of the multi-layer air hole, all airports it is interior
Diameter is all the same, and the internal diameter of each airport is 2.0~4.0 μm, and the spacing between adjacent airport is 0.5~1.5 μm, every layer
The airport of ring is arranged in regular hexagon；The diameter of silica clad is 110~175 μm, and the decaying of the optical fiber is lower than 10dB/
km。
Based on the above technical solution, the ring number of plies is 7~9 layers.
Based on the above technical solution, the ring number of plies is 9 layers.
Based on the above technical solution, the diameter of the silica core be 3.2~5.0 μm, each airport it is interior
Diameter is 2.6~4.0 μm, and the spacing between adjacent airport is 0.9~1.5 μm, and the diameter of silica clad is 140~175 μm.
Based on the above technical solution, the diameter of the silica core is 4.7 μm, and the internal diameter of each airport is
3.2 μm, the spacing between adjacent airport is 1.3 μm, and the diameter of silica clad is 175 μm；When the ring number of plies is 9 layers,
The nonlinear factor of the optical fiber is 14.1W in 1064nm-1km-1；At 1064nm, the light is measured with the rear end process of chopping
Fine loss is 3.5dB/km.
Based on the above technical solution, it is also coated with outside the silica clad poly- for being protected to the optical fiber
Close object coating.
Based on the above technical solution, the polymer coating uses polyacrylic resin or polyimide resin system
At.
Based on the above technical solution, the optical fiber combines the gradual method for changing control parameter using multipole method
It optimizes.
Compared with prior art, advantages of the present invention is as follows:
(1) present invention passes through the optimization group of micropore and fibre core in conjunction with the feedback of actual test situation by theoretical fitting
It closes, it is attached that the zero-dispersion wavelength of photonic crystal fiber from the communications applications wave band such as 1550nm of traditional fiber is displaced to 1064nm
Closely, a kind of zero dispersion non-linear displacement photonic crystal fiber is obtained.The optical fiber has the airport number of plies and air of special ratios
Hole duty ratio, shows as zero dispersion near 1064nm, can when the laser of 1064nm wave band passes through the photonic crystal fiber
Realize the nonlinear effects such as splendid four-wave mixing, therefore, which can be used in developing parameter amplifier with high performance
And parametric oscillator, it realizes good 1 micron waveband Special Nonlinear application effect, obtains for bio-imaging and spectrum analysis
Non-traditional wave band high power laser light.
(2) extremely sensitive to the structural parameters of optical fiber for the zero-dispersion wavelength of microstructured optical fibers, the present invention is in design
In the process, the gradual method for changing control parameter is combined to obtain most gradually to optimize the structural parameters of optical fiber using multipole method
Excellent structure realizes that the zero dispersion with optimum parameter gain is displaced photonic crystal fiber.
(3) zero dispersion of the invention displacement photonic crystal fiber has lower decaying and preferable gain efficiency, decaying
It is below 10dB/km, minimum attenuation reaches within 5dB/km；Wherein, most preferred embodiment is guaranteeing good 1064nm wave band
While zero dispersion control ability, it is that the photonic crystal fiber of core diameter within 5 microns can reach that decaying, which reaches within 4dB/km,
Optimized attenuation, so as to for develop have wideband adjustable parametric oscillator and parameter amplifier lay the foundation, thus grind
The parametric oscillator of system has good four-wave mixing gain spectral.
Detailed description of the invention
Fig. 1 is the toroidal ring structure schematic diagram of zero dispersion displacement photonic crystal fiber in the embodiment of the present invention；
Fig. 2 is the end face structure figure of zero dispersion displacement photonic crystal fiber in the embodiment of the present invention；
Fig. 3 is the zero dispersion point curve graph of zero dispersion displacement photonic crystal fiber in the embodiment of the present invention 21；
Fig. 4 is by the gain spectral curve graph of zero dispersion displacement photonic crystal fiber acquisition in the embodiment of the present invention 21.
Appended drawing reference: 1-silica core, 2-first layer airport rings, 3-second layer airport rings, 4-thirds
Layer airport ring, 5-the four layer of airport ring, 6-layer 5 airport rings, 7-layer 6 airport rings, 8-
Layer 7 airport ring, 9-the eight layer of airport ring, 10-the nine layer of airport ring, 11-silica clads.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in further detail.
Referring to shown in Fig. 1, Fig. 2, the embodiment of the present invention provides a kind of zero dispersion displacement photonic crystal fiber, including quartz fibre
Core 1, the multi-layer air hole toroidal ring structure being looped around around silica core 1, the quartz being coated on outside the toroidal ring structure of multi-layer air hole
Covering 11, the diameter of silica core 1 are 3.2~5.0 μm；Air hole number=ring layer in the toroidal ring structure of multi-layer air hole
Number * 6, the internal diameter of all airports is all the same, and the internal diameter of each airport is 2.0~4.0 μm, between adjacent airport between
Away from being 0.5~1.5 μm, the airport of every layer of ring is arranged in regular hexagon；The diameter of silica clad 11 is 110~175 μm.
The polymer coating for being protected to the optical fiber, the polymer coating can also be coated with outside silica clad 11
It can be made of polyacrylic resin or polyimide resin.
Specifically, closely the air hole number N1=1*6=6 of the first layer airport ring 2 of silica core 1 is a, second
The air hole number of layer airport ring 3 N2=2*6=12, and so on, the air hole number Nx of xth layer airport ring
=x*6；For example, when ring quantity is 9 layers, the air hole number of first layer airport ring 2 N1=6, second layer airport
The air hole number of ring 3 is N2=12, and the air hole number of third layer airport ring 4 is a for N3=3*6=18, the 4th
The air hole number of layer airport ring 5 is N4=4*6=24, and the air hole number of layer 5 airport ring 6 is N5=
5*6=30, the air hole number of layer 6 airport ring 7 is N6=6*6=36, the sky of layer 7 airport ring 8
Stomata quantity is N7=7*6=42, and the air hole number of the 8th layer of airport ring 9 is N8=8*6=48, the 9th layer of sky
The air hole number of stomata ring 10 is N9=9*6=54.
The ring number of plies of multi-layer air hole toroidal ring structure is generally 7~9 layers, in practical application, and the ring number of plies is 9 layers.
When needing the parametric oscillator of higher power to work, it is sub- that polyacrylic resin or polyamides resistant to high temperature can be used
Polyimide resin makes polymer coating, is coated in outside silica clad 11.The optical fiber can keep good under conditions of more than 100 degree
Good working condition.Wherein, when using polyacrylic resin as coating material, the maximum temperature to work long hours is up to 150
Degree；When using polyimide resin as coating material, the maximum temperature to work long hours is up to 300 degree.
Below by 21 specific embodiments, the invention will be further described:
The structural parameters for the zero dispersion displacement photonic crystal fiber that Examples 1 to 7 provides are as shown in table 1:
The structural parameters of the zero dispersion displacement photonic crystal fiber of 1,7 layer of airport ring of table
Ginseng is shown in Table 1, and in Examples 1 to 7, airport ring is 7 layers, and zero-dispersion wavelength is 980~1088nm, and with
The increase of silica clad diameter and increase；Optical fiber attenuation range decays larger within 9.0dB/km；The polymer of optical fiber applies
Layer is made of polyimide resin, and the maximum temperature to work long hours is up to 300 degree.
The structural parameters for the zero dispersion displacement photonic crystal fiber that embodiment 8~14 provides are as shown in table 2:
The structural parameters of the zero dispersion displacement photonic crystal fiber of 2,8 layers of airport ring of table
Ginseng is shown in Table 2, and in embodiment 8~14, airport ring is 8 layers, and zero-dispersion wavelength is 992~1078nm, and
Reduce with the increase of silica clad diameter；Optical fiber attenuation range is within 7.0dB/km；The polymer coating of optical fiber uses
Polyacrylic resin is made, and the maximum temperature to work long hours is up to 150 degree.
The structural parameters for the zero dispersion displacement photonic crystal fiber that embodiment 15~21 provides are as shown in table 3:
The structural parameters of the zero dispersion displacement photonic crystal fiber of 3,9 layers of airport ring of table
Ginseng is shown in Table 3, and in embodiment 15~21, airport ring is 9 layers, and zero-dispersion wavelength is in 1040~1069nm；
Optical fiber attenuation range decays smaller, minimum attenuation is up to 3.5dB/km within 6.0dB/km；The polymer coating of optical fiber uses
Polyacrylic resin is made.
Wherein, embodiment 21 is most preferred embodiment.In the embodiment ring number of plies of optical fiber be 9 layers, silica core it is straight
Diameter is 4.7 μm, and the internal diameter of each airport is 3.2 μm, and the spacing between adjacent airport is 1.3 μm, silica clad it is straight
Diameter is 175 μm.Parametric four-wave mixing gain spectral producible in the optical fiber is tested, according to effective core area, is calculated
Its nonlinear factor is 14.1W in 1064nm out-1km-1；At 1064nm, measuring its loss with the rear end process of chopping is
3.5dB/km。
It is pumped using the stable ytterbium mode locked fiber laser of mixing of cheap, performance, is realized in photonic crystal fiber
The light source of super wideband and tunable has carried out parameter amplification research to each embodiment.It is shown in Figure 3, the zero of the offer of embodiment 21
The zero-dispersion wavelength of dispersion shift photonic crystal fiber is located at 1060nm, and flat dispersion curve is obtained near 1060nm.
The parametric four-wave mixing gain spectral of wideband adjustable can also be obtained by zero dispersion displacement photonic crystal fiber of the invention.Referring to
Shown in Fig. 4, when pumping wavelength is tuned to 1062nm from 1060nm, the signal wavelength of oscillation is moved to 1107nm from 1138nm.
Thus can design all-optical fibre structure oscillation chamber, intracavitary all space optics are removed, are all replaced with optical fiber, thus
Chamber damage is significantly reduced, its energy transfer efficiency is made to realize the raising of matter, is shaken using the Fiber-optic parameter of the optical fiber development
The energy conversion efficiency for swinging device is increased to 36%, reaches current international highest energy transfer efficiency.The work progress is by state
The concern of border academia, it is believed that the non-traditional wave band high power laser light for bio-imaging and spectrum analysis has been filled up in this work
Blank.
The principle of the embodiment of the present invention is described below:
The present invention devises the non-linear photon crystal light that a kind of zero-dispersion wavelength is located near 1064nm using multipole method
Fibre draw for the ease of more accurate, and the airport in cross section is designed as to the distribution of triangle steady type, and according to
Model, which calculates, transmits effective refractive index corresponding to basic mode at each wavelength, then the pass according to refractive index and dispersion parameters
System, calculates the dispersion characteristics of photonic crystal fiber, and carried out the measurement of dispersion characteristics to the optical fiber actually developed, will design
Analysis comparison is carried out between value and actual measured value, so that the zero dispersion that meets for having advanced optimized photonic crystal fiber is displaced
It is required that air pore structure, successfully develop photonic crystal fiber of the zero-dispersion wavelength near 1064nm.
Those skilled in the art can carry out various modifications to the embodiment of the present invention and modification, if these modifications and change
For type within the scope of the claims in the present invention and its equivalent technologies, then these modifications and variations are also in protection scope of the present invention
Within.
The prior art that the content being not described in detail in specification is known to the skilled person.
Claims (7)
1. a kind of zero dispersion is displaced photonic crystal fiber, which includes silica core (1), is looped around around silica core (1)
Multi-layer air hole toroidal ring structure, the silica clad (11) that is coated on outside the toroidal ring structure of multi-layer air hole, it is characterised in that: it is described
The diameter of silica core (1) is 3.2~5.0 μm；Air hole number=ring number of plies * in the toroidal ring structure of the multi-layer air hole
6, the internal diameter of all airports is all the same, and the internal diameter of each airport is 2.0~4.0 μm, the spacing between adjacent airport
It is 0.5~1.5 μm, the airport of every layer of ring is arranged in regular hexagon；The diameter of silica clad (11) is 110~175 μm, should
The decaying of optical fiber is lower than 10dB/km, is implemented around zero dispersion in 1064nm, the ring number of plies is 7~9 layers.
2. zero dispersion as described in claim 1 is displaced photonic crystal fiber, it is characterised in that: the ring number of plies is 9 layers.
3. the zero dispersion as described in any one of claims 1 to 2 is displaced photonic crystal fiber, it is characterised in that: the quartz
The diameter of fibre core (1) is 3.2~5.0 μm, and the internal diameter of each airport is 2.6~4.0 μm, the spacing between adjacent airport
It is 0.9~1.5 μm, the diameter of silica clad (11) is 140~175 μm.
4. zero dispersion as claimed in claim 3 is displaced photonic crystal fiber, it is characterised in that: the silica core (1) it is straight
Diameter is 4.7 μm, and the internal diameter of each airport is 3.2 μm, and the spacing between adjacent airport is 1.3 μm, silica clad (11)
Diameter be 175 μm；When the ring number of plies is 9 layers, the nonlinear factor of the optical fiber is 14.1W- in 1064nm1km-1；?
It is 3.5dB/km with the loss that the rear end process of chopping measures the optical fiber at 1064nm.
5. zero dispersion as described in claim 1 is displaced photonic crystal fiber, it is characterised in that: the silica clad (11) is gone back outside
Coated with the polymer coating for being protected to the optical fiber.
6. zero dispersion as claimed in claim 5 is displaced photonic crystal fiber, it is characterised in that: the polymer coating is using poly-
Acrylic resin or polyimide resin are made.
7. zero dispersion as described in claim 1 is displaced photonic crystal fiber, it is characterised in that: the optical fiber uses multipole method knot
The gradual method for changing control parameter is closed to optimize.
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| CN105807365A (en) * | 2016-05-31 | 2016-07-27 | 中国工程物理研究院激光聚变研究中心 | Photonic crystal fiber |
| CN108957626B (en) * | 2018-06-19 | 2020-09-08 | 全球能源互联网研究院有限公司 | A feedback energy transmission optical fiber and optical fiber energy transmission system and device |
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