CN102401933A - Totally doped photonic crystal fiber and preparation method thereof - Google Patents
Totally doped photonic crystal fiber and preparation method thereof Download PDFInfo
- Publication number
- CN102401933A CN102401933A CN2011103712894A CN201110371289A CN102401933A CN 102401933 A CN102401933 A CN 102401933A CN 2011103712894 A CN2011103712894 A CN 2011103712894A CN 201110371289 A CN201110371289 A CN 201110371289A CN 102401933 A CN102401933 A CN 102401933A
- Authority
- CN
- China
- Prior art keywords
- kapillary
- doped
- photonic crystal
- fiber
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Lasers (AREA)
Abstract
The invention relates to a totally doped photonic crystal fiber and a preparation method thereof. The totally doped photonic crystal fiber comprises solid capillary tubes arranged in turn from inside to outside, hollow capillary tube layers arranged uniformly around the solid capillary tubes and sleeve tubes disposed outside of the hollow capillary tube layers, wherein the solid and hollow capillary tubes are made from quartz materials doped with rare earth elements. The whole fiber section of the totally doped photonic crystal fiber contains rare earth elements, which can greatly increase area of active area and improve conversion efficiency; in combination with endlessly single mode characteristic of the photonic crystal fiber, active fiber with ultra-large mode field can be very easily realized; the photonic crystal fiber with large mode field area has extremely low non linear coefficient and very high pump light numerical aperture, prevents pulse breakup and meanwhile ensures single mode running of the fiber laser, so that average power and single pulse energy of the totally doped photonic crystal fiber are further increased.
Description
Technical field
The present invention relates to the optical communication material, be specifically related to a kind of full doped photon crystal optical fiber and preparation method thereof.
Background technology
Optical fiber is the information transmission carrier of optical communication; Be one of main means that realize the high-capacity and high-speed wide screen; The communication of backbone has at present realized Optical Fiber Transmission basically, but the employed optical fiber of backbone is processed by pure quartz material at present, and its cost is high, pliability is poor.
Though the design of photonic crystal fiber has very big degree of freedom; But the size and the geometric configuration of material chosen, structure type, fibre core or covering hollow pore, and the spacing of airport, density, arrangement mode etc. all can produce material impact to the characteristic of photonic crystal fiber.Some simple microstructure parameters change the performance that just can make photonic crystal fiber significant the change are taken place; Usually appropriate change part corresponding structure parameter as required; In order to regulate or the original characteristic of cutting photonic crystal fiber; Some characteristic of photonic crystal fiber is enhanced or reduces, be beneficial to the various uses of different occasions.Because the special construction of photonic crystal fiber, make photonic crystal fiber have many and diverse or unique, the potential performance of conventional fiber, can realize the function that many conventional fibers can't be realized and get more and more people's extensive concerning.From present research work; Can put it briefly; Photonic crystal fiber not only can be realized the performance of conventional fiber; Can realize that also conventional various optical fiber receives the limit of structural design, realize some some characteristics of in conventional fiber (comprising conventional special optical fiber) research, not found in addition.
The nothing of PCF is irrelevant by unimodular property and its absolute dimension, optical fiber amplification or dwindle in the same old way and can keep single transport, and this shows and can design the optical fiber mode fields area according to specific needs.Through selecting the optimal air bore dia, big mode field area is not combined with having by the single mode transport characteristic, not only can be used to transmit high-power energy, also may be used in fiber amplifier and the fiber laser.The researchist of Britain Bath university has developed and has been operated in 458nm, core diameter is the single mode PCF of 23 μ m, and this needs the precision of control refringence to reach 10 in traditional single-mode fiber
-7, be that chemical vapour deposition technique is beyond one's reach.The mode field area of this PCF is about 10 times of conventional single mode fiber, when being used to transmit high power light and need not worry to occur nonlinear effect, can also be applied to fiber amplifier and fiber laser simultaneously.Otherwise, when needs high non-linearity effect, can reduce the mode field area of optical fiber.Can regulate effective mode field area through changing the airport spacing, range of adjustment is about 1 ~ 800 μ m at 1.5 mum wavelength places
2If in airport, fill suitable nonlinear material, also can significantly improve the non-linear of PCF.The Bell laboratory finds to have only the 100fs light pulse of 1W to inject the single-mode optics that the long PCF of 75cm has produced ultra wide continuous spectrum by peak power, and bandwidth reaches 1000nm, from the purple light to the near infrared.The generation of ultra wide continuous spectrum relates to the non-linear process of a series of complicacies, and relevant with it factor possibly comprise extremely low effective mode field area, special dispersion characteristics and the low-loss of PCF.When the airport spacing changed in the scope of 1 ~ 20 μ m, the core diameter size can not influence the nothing of optical fiber by the single mode transport characteristic, and therefore when functional requirement was realized, its structural design provided very high degree of freedom on making.
Optical fiber with doped rare earth element can be by directly pumping of laser diode (LD) as the mode-locked laser of gain media, and its efficient is high, structure is tight, cheap.But because the light beam of fs-laser system is closed in the fibre core fully, do not receive the influence of surrounding environment, femto-second laser is freed from ultra-clean, constant temperature and shockproof Advanced Concepts Laboratory.And optical fiber has very big surface area/volume ratio, has fabulous radiating effect, can utilize the direct pumping of high-power LD, realizes high-capacity optical fiber laser.But the locked mode running of traditional fiber laser instrument under high power receives the restriction of nonlinear fiber; The big mode field area photonic crystal fiber is through introducing the airport of periodic arrangement in fibre cladding; Can greatly improve the core diameter of optical fiber and keep single mode, thereby effectively reduce non-linear.
Summary of the invention
Technical matters to be solved by this invention provides a kind of full doped photon crystal optical fiber and preparation method thereof, and photonic crystal fiber of the present invention is processed through the quartz material that employing is doped with REE.
The present invention is in order to solve the problems of the technologies described above; A kind of full doped photon crystal optical fiber is provided; Comprise the solid kapillary that is provided with successively from inside to outside, the sleeve pipe that centers on the evenly distributed hollow capillary fringe of solid kapillary and be located at the hollow capillary fringe outside; Wherein, said solid kapillary and hollow kapillary adopt the quartz material that is doped with REE to process.
Further, said Doped Rare Earth element comprises one or more the combination in lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc) and the yttrium (Y).
The present invention also provides a kind of method for preparing said full doped photon crystal optical fiber, and said method comprises the steps:
Adopt the beneficial effect of the invention described above technical scheme to be: its whole optical fiber cross section of full doped photon crystal optical fiber provided by the invention all comprises REE, can increase the area of active region greatly, increases conversion efficiency; Nothing in conjunction with photonic crystal fiber is ended unimodular property, can realize the Active Optical Fiber of super large mould field easily; Its big mode field area photonic crystal fiber has extremely low nonlinear factor and very high pump light numerical aperture; Prevent the pulse division; Guarantee simultaneously the single mode running of fiber laser again, feasible average power and the single pulse energy that has further improved full doped photon crystal optical fiber.
Description of drawings
Fig. 1 is the cross section structure synoptic diagram of full doped photon crystal optical fiber in the embodiment of the invention;
Fig. 2 is the method flow diagram of the full doped photon crystal optical fiber of preparation in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and characteristic are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
Fig. 1 is the cross section structure synoptic diagram of full doped photon crystal optical fiber in the embodiment of the invention; As shown in Figure 1; Said full doped photon crystal optical fiber; Comprise the solid kapillary 3 that is provided with successively from inside to outside, around evenly distributed 2 layers in hollow kapillary of solid kapillary 3 and the sleeve pipe 3 that is located at 2 layers of outside of hollow kapillary, in embodiments of the present invention, said solid kapillary 1 adopts the quartz material that is doped with REE to process with hollow kapillary 2.
In the above-described embodiments, said Doped Rare Earth element comprises one or more the combination in lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb) and the lutetium (Lu).
In photonic crystal fiber, mix various REEs; Like ytterbium ion (Yb3+), erbium ion (Er3+) etc.; Can make the performance of photonic crystal fiber more rich and varied; Can control, regulate the light limitation capability in the photonic crystal fiber through structure type, solid kapillary or around the size and the geometric configuration of solid hollow capillary bore capillaceous; This is a kind of very novelty, uniqueness and useful method, can be widely used in the active optical component field, like high-capacity optical fiber laser, fiber amplifier, super continuum light spectrum light source etc.In a word, doped photon crystal optical fiber and correlation technique thereof have huge application potential and exploitation value entirely, and the popularization of going deep into and using along with research will produce important and far-reaching influence to fiber laser and association area thereof.
The optical fiber that doped with rare-earth elements is processed in quartz can become laser medium, and rare earth or title lanthanide series have 15 altogether, in the periodic table of elements, occupy the position of row second from the bottom, and all REEs have identical exoelectron structure 5s
25p
66s
2, i.e. filled shell.The ionization of REE takes place with the form that forms three valence states usually, for example Nd
3+, Yb
3+, Er
3+Deng, they overflow 2 6s and 1 4f electronics.Because remaining 4f electronics receives shielding action, so their fluorescence and absorbing wavelength are not subject to the influence in outfield.For the optical fiber that is doped with REE, on the corresponding wavelength of its absorption band, necessary pumping is provided, the condition that forms gain and vibration is provided on the corresponding wavelength of its fluorescence, it just can produce laser.Be doped with the chief component of REE optical fiber as optical resonator, its dopant ion classification and concentration play great role for the running of fiber laser.Rare earth ion as gain media is to be doped in SiO with certain concentration and distribution
2In the fibre core for Main Ingredients and Appearance.These rare earth ions have from ultraviolet to infrared very wide fluorescence spectrum scope, and this just makes the emission wavelength of fiber laser cover wideer wave band.
Another embodiment of the present invention provides a kind of method for preparing above-mentioned full doped photon crystal optical fiber; In the manufacturing of photonic crystal fiber; Method the most commonly used is that kapillary is piled up drawing process; Hollow kapillary and solid kapillary are piled up and the fusion shaping according to the periodic structure of desired design, prepared photonic crystal fiber through wire drawing then, the concrete parameter of technological process need be confirmed according to concrete photonic crystals optical fiber structure.Fast-developing in recent years photonic crystal fiber manufacturing process has made that the photonic crystal fiber of making low-loss, labyrinth becomes possibility.The manufacturing process of photonic crystal fiber also can be applied to other host materials, and like multicomponent glass, polymeric material etc., the fusing point of these new materials are far below quartz material, and their application has also promoted the development of photonic crystal fiber technology simultaneously.
The manufacturing process that full doped photon crystal optical fiber adopts is the conventional method kapillary accumulation drawing process that photonic crystal fiber is made the field; This method flexible design, easy to operate, realize the microstructured optical fibers of various labyrinths easily, its typical manufacture process comprises the steps:
Below specify principle of the present invention through a concrete embodiment; Concrete preparation process of the present invention be be doped with REE hollow quartz capillary and stuffed quartz rod pile up according to the periodic structure of desired design and fusion is shaped; Utilize the drawing process of ordinary optic fibre more being drawn into the photonic crystal fiber that meets dimensional requirement under precise dose and the speed control; In drawing process; Speed through inner inert gas pressure of adjustment prefabricated rods and wire drawing keeps the size of optical fiber hollow pore, thereby obtains the photonic crystal fiber of a series of different structures, and the concrete parameter of its technological process need be confirmed according to the PCF design.
In order to guarantee the cleaning of capillary surface, in manufacturing process, to pay special attention to dust removal process.The high purity quartz pipe of at first choosing prior design is as sleeve pipe; Use the identical full doping kapillary of thickness to pile up and put into sleeve pipe around the stuffed quartz rod; Row in the whole sleeve pipe is full, the difficulty that so not only can reduce to arrange, and also the prefabricated rods of processing is more even; Help evenly stressed and expansion in pulling process, so just accomplished the making of prefabricated rods.
The drawing of full doped photon crystal optical fiber is the key component in the whole technological process; In drawing process; Full doped photon crystal optical fiber prefabricated rods upper end is added an inert gas flow; Use air pump that it is bled in its lower end, make the prefabricated rods internal gas pressure keep constant and more approaching, can better keep the structure of full doped photon crystal optical fiber like this with external atmosphere pressure.But the air pressure of inert gas flow will keep appropriateness, when intraductal atmospheric pressure is bigger than the atmospheric pressure of outside, the quartz ampoule sheath is outwards expanded, and causes full doped hollow kapillary to separate with sleeve pipe with the stuffed quartz rod.In this process, especially to note the variation of air pressure, make air pressure be in steady state (SS) as far as possible, otherwise can influence the homogeneity of full doped photon crystal optical fiber.
The photonic crystal fiber for preparing in the embodiment of the invention has increased fibre core area, big mode field area greatly, has overcome nonlinear interaction, has increased the stored energy of fibre core; Reduced the relative index of refraction of fibre core and inner cladding simultaneously, keeping the approximate single mode transport of radiation laser, thereby the laser of in optical fiber, realizing high impulse energy and high light beam quality is exported.If this type optical fiber adopts full doped photon crystal optical fiber technology, with the laser instrument that very is fit to development high power, high light beam quality, because big mould field helps the absorption to pump light, single transverse mode has guaranteed the output quality of laser.Pump light all is the fibre core in the middle of the pumping core from multimode is coupled to, thereby has prolonged pumping length so that pump light is fully absorbed.This simply, coupling scheme efficiently, make the pump light of the multimode state that high-power semiconductor laser produces, be converted into high brightness laser effectively with fine beam quality.Same principle, the design of the structural parameters in only needing to change in the surrounding layer.Big and close like what the airport in the surrounding layer was done, it is little and thin that the airport in the inner cladding is done, and the refringence of surrounding layer is very big in can making, thereby make numerical aperture can accomplish very big (> 0.7), this also is convenient to the coupling of pump light.The full doped photon crystal optical fiber in this big mould field makes the average power and the single pulse energy that further improve fiber laser become possibility for the fiber laser of development high power, high light beam quality provides a kind of new approach.
The full doped photon crystal optical fiber in this big mould field has following advantage:
1) single is high through gain, has best pump light-laser-conversion efficiency, and pump light is fully absorbed, thereby makes that total light-light conversion efficiency is improved under the continuous light running;
2) can obtain the beam quality of diffraction limit;
3) optical fiber has big surface area/volume ratio, and good heat dissipation effect makes laser instrument can produce the laser of high brightness and very high peak power, simultaneously can continuous working under the state that does not improve refrigeration intensity;
4) realize single mode, single-frequency operation easily; Can control transverse mode through the control core size, if optical fiber is only supported a transverse mode, it will keep this state always; Even also be so under very high pump power, this design brings great convenience for the fiber laser of high-power operation.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. full doped photon crystal optical fiber; Comprise the solid kapillary that is provided with successively from inside to outside, the sleeve pipe that centers on the evenly distributed hollow capillary fringe of solid kapillary and be located at the hollow capillary fringe outside; It is characterized in that said solid kapillary and hollow kapillary adopt the quartz material that is doped with REE to process.
2. photonic crystal fiber according to claim 1; It is characterized in that said Doped Rare Earth element comprises one or more the combination in lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc) and the yttrium (Y).
3. a method for preparing claim 1 or 2 described full doped photon crystal optical fibers is characterized in that said method comprises the steps:
Step 1 adopts the quartz material that is doped with REE to make the solid kapillary and the hollow kapillary of optical fiber respectively;
Step 2 is evenly arranged in the solid kapillary that is doped with REE for preparing and hollow kapillary in the sleeve pipe by periodic structure and fuses moulding;
Step 3 is carried out wire drawing with the one-piece construction that includes solid kapillary, hollow kapillary and sleeve pipe of fusion moulding and is handled, and accomplishes the preparation of full doped photon crystal optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103712894A CN102401933A (en) | 2011-11-21 | 2011-11-21 | Totally doped photonic crystal fiber and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103712894A CN102401933A (en) | 2011-11-21 | 2011-11-21 | Totally doped photonic crystal fiber and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102401933A true CN102401933A (en) | 2012-04-04 |
Family
ID=45884330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103712894A Pending CN102401933A (en) | 2011-11-21 | 2011-11-21 | Totally doped photonic crystal fiber and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102401933A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698841A (en) * | 2013-12-18 | 2014-04-02 | 江苏大学 | Microstructure fiber device |
| CN105467509A (en) * | 2015-12-09 | 2016-04-06 | 燕山大学 | A photonic crystal optical fiber based on graphene |
| CN113093326A (en) * | 2021-04-16 | 2021-07-09 | 北京工业大学 | Large-mode-area photonic crystal fiber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040062499A1 (en) * | 2002-08-22 | 2004-04-01 | Alcatel | Method of fabricating an optical fiber with microstructures |
| CN1605894A (en) * | 2004-11-18 | 2005-04-13 | 上海大学 | Magneto-optic effect photon crystal fiber and manufacturing method thereof |
| CN1673138A (en) * | 2005-03-25 | 2005-09-28 | 中国科学院上海光学精密机械研究所 | Preparation method of photonic crystal optical fiber preform |
| CN1767281A (en) * | 2004-10-28 | 2006-05-03 | 日立电线株式会社 | Optical fiber for fiber laser, fiber laser, and laser oscillation method |
-
2011
- 2011-11-21 CN CN2011103712894A patent/CN102401933A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040062499A1 (en) * | 2002-08-22 | 2004-04-01 | Alcatel | Method of fabricating an optical fiber with microstructures |
| CN1767281A (en) * | 2004-10-28 | 2006-05-03 | 日立电线株式会社 | Optical fiber for fiber laser, fiber laser, and laser oscillation method |
| CN1605894A (en) * | 2004-11-18 | 2005-04-13 | 上海大学 | Magneto-optic effect photon crystal fiber and manufacturing method thereof |
| CN1673138A (en) * | 2005-03-25 | 2005-09-28 | 中国科学院上海光学精密机械研究所 | Preparation method of photonic crystal optical fiber preform |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698841A (en) * | 2013-12-18 | 2014-04-02 | 江苏大学 | Microstructure fiber device |
| CN103698841B (en) * | 2013-12-18 | 2017-04-05 | 江苏大学 | A kind of microstructure fiber device |
| CN105467509A (en) * | 2015-12-09 | 2016-04-06 | 燕山大学 | A photonic crystal optical fiber based on graphene |
| CN105467509B (en) * | 2015-12-09 | 2018-05-25 | 燕山大学 | A kind of photonic crystal fiber based on graphene |
| CN113093326A (en) * | 2021-04-16 | 2021-07-09 | 北京工业大学 | Large-mode-area photonic crystal fiber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102087378B (en) | A rare-earth-doped optical fiber having small numerical aperture | |
| US9499922B2 (en) | Manufacturing method of double cladding crystal fiber | |
| CA2672007C (en) | Method for fabricating a preform, a preform, an optical fiber and an amplifier | |
| CN110247291B (en) | PbS annular core optical fiber for amplifying OAM light beam and preparation method thereof | |
| CN110651209A (en) | Multi-clad optical fiber | |
| JP2007523035A (en) | Double clad optical fiber with glass core doped with rare earth metal | |
| WO2008094234A2 (en) | High numerical aperture fiber | |
| JP5612654B2 (en) | Rare earth doped optical fibers for fiber lasers and fiber amplifiers | |
| CN103257399A (en) | Device used for fiber laser and capable of filtering out cladding light | |
| JP2013147421A (en) | Rare earth doped optical fiber | |
| CN100587528C (en) | Gain photon crystal fiber waveguide and its device | |
| CN107621670A (en) | All solid state antiresonance optical fiber | |
| CN1243259C (en) | Rare-earth doped photon crystal optical fiber | |
| JP5819266B2 (en) | Manufacturing method of single mode fiber | |
| Sen et al. | High power laser fiber fabricated through vapor phase doping of Ytterbium | |
| CN102401933A (en) | Totally doped photonic crystal fiber and preparation method thereof | |
| CN109494554A (en) | A kind of middle infrared band profile pump optical fiber pumping signal bundling device | |
| Dianov et al. | Lasers and fiber optics | |
| JPS63184386A (en) | Optical fiber and optical fiber type light emitting material | |
| US20090180174A1 (en) | Rare-earth-doped optical fiber, optical fiber amplifier, and method of manufacturing a preform for such fiber | |
| CN100357204C (en) | Semiconductor film inner packing layer enlarging optical fiber and its premade rod manufacturing method | |
| CN1257429C (en) | Semiconductive thin film inner cladding amplifying optical fiber and manufacturing method thereof | |
| JP2007149766A (en) | Photonic band gap fiber | |
| Mrazek et al. | Active optical fibers doped with ceramic nanocrystals | |
| Wang et al. | Nd3+-doped soft glass double-clad fibers with a hexagonal inner cladding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120404 |