CN107561635A - Gradual change absorption coefficient gain fibre and optical system - Google Patents
Gradual change absorption coefficient gain fibre and optical system Download PDFInfo
- Publication number
- CN107561635A CN107561635A CN201710952600.1A CN201710952600A CN107561635A CN 107561635 A CN107561635 A CN 107561635A CN 201710952600 A CN201710952600 A CN 201710952600A CN 107561635 A CN107561635 A CN 107561635A
- Authority
- CN
- China
- Prior art keywords
- covering
- absorption coefficient
- gradual change
- cross sectional
- sectional shape
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 122
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 77
- 230000008859 change Effects 0.000 title claims abstract description 53
- 230000003287 optical effect Effects 0.000 title claims abstract description 16
- 238000005086 pumping Methods 0.000 claims abstract description 61
- 238000002347 injection Methods 0.000 claims abstract description 42
- 239000007924 injection Substances 0.000 claims abstract description 42
- 239000013307 optical fiber Substances 0.000 claims abstract description 33
- 238000005498 polishing Methods 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 7
- 238000005253 cladding Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- 101100456571 Mus musculus Med12 gene Proteins 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Lasers (AREA)
Abstract
The invention provides a kind of gradual change absorption coefficient gain fibre and optical system, it is related to technical field of optical fiber.The gradual change absorption coefficient gain fibre includes covering, including covering, and the covering has the cross sectional shape gradually changed vertically so that the covering have vertically and the cross sectional shape gradually changed corresponding to the absorption coefficient that gradually changes.Wherein, the output end cross sectional shape matching of the pumping injection end cross sectional shape of the covering and the energy-transmission optic fibre for input pumping light.Relative to prior art, the present invention is by setting covering to have axially varying cross sectional shape, to adjust the absorption coefficient distribution of covering vertically, and then enable the gain fibre and the energy-transmission optic fibre matched well for input pumping light, and absorption coefficient is relatively low, introduced details are easy, can significantly reduce the risk that fusion point burns.
Description
Technical field
The present invention relates to technical field of optical fiber, in particular to a kind of gradual change absorption coefficient gain fibre and optical system
System.
Background technology
In high power optical fibre laser research, the performance of gain fibre has a significant impact to the laser activity of laser system,
Gain fibre be co-doped with element (such as Al, P, Ge, B, Ce, F element) and its distribution, index distribution, rare earth element (Yb, Er,
Tm, Ho etc.) doping and optical fiber preparation technology (such as MCVD, OVD, PCVD, gas phase doping method, solution doping technique) etc., determine
The waveguiding structure of gain fibre, absorption coefficient, loss characteristic, and then to the lasing efficiency, output spectrum, light beam of laser system
Quality, nonlinear characteristic etc. make a significant impact.It can be seen that the development of gain fibre is the important side of high power optical fibre laser research
Face.
However, current fiber laser system is widely used that based on main oscillations structure for amplifying (MOPA) and end pumping
Technology.Thousands of watts of pump light injects gain fibre from one end of gain fibre, and pump light absorbs rapidly simultaneously in optical fiber injection end
Laser is converted to, causes the uneven of laser gain；Due to Excited state, the heat distribution of optical fiber is also very uneven.It is this not
A series of negative effect is uniformly result in, causes the threshold value of nonlinear effect, pattern unstability etc. to reduce, development limits
The power ascension of laser.
In addition, welding and coating that powerful end pumping injects also can be to decanting point cause very big difficulty.In Gao Gong
In the experiment of rate optical-fiber laser, fusion point can often be led because of mismatch, the high-gain of circular energy-transmission optic fibre to octagonal gain fibre
Fusion point caused by the factors such as the high heat of cause is overheated and burnt.
Mainly polished at present using high power laser light gain fibre using octagon, to avoid the generation of vortex light and increasing
Big covering absorption coefficient, and the biography energy fibre of transmission signal light and output laser is circle, the optical-fiber laser system of all optical fibre structure
System needs the gain fibre by the energy-transmission optic fibre of circle and octagon to be welded together, and this welding inevitably causes
The mismatch of covering, difficulty is caused to welding and coating.In addition, the absorption coefficient of gain fibre can be retouched with formula below
State：
Wherein, α is absorption coefficient, PinTo inject pump light, PoutTo export pump light.For now widely used business
With Nufern 20/400LMA YDF optical fiber, its absorption coefficient is usually 0.4dB/m@976nm, and linear absorption coefficient means pump
Pu light is exponential damping in gain fibre, i.e. Pumping light absorption is very uneven.
Therefore, researcher, which wishes to obtain always, absorbs more uniform gain fibre, caused by suppressing gain inequality
Many problems, but to realize that grade doping is extremely difficult in gain fibre, it will also result in a lot of other problems.
The content of the invention
It is an object of the invention to provide a kind of gradual change absorption coefficient gain fibre and optical system, and it can be effectively improved
Above mentioned problem.
What embodiments of the invention were realized in：
In a first aspect, the embodiments of the invention provide a kind of gradual change absorption coefficient gain fibre, it includes covering, the bag
Layer has the cross sectional shape gradually changed vertically, and the covering has corresponding with the cross sectional shape gradually changed vertically
The absorption coefficient gradually changed, wherein, the pumping injection end cross sectional shape of the covering and the biography energy for input pumping light
The output end cross sectional shape matching of fibre cladding.
In preferred embodiments of the present invention, the pumping injection end section of the covering is circle, and output end section is just
Octagon.
In preferred embodiments of the present invention, the covering is divided into multistage vertically, adjacent two in the multistage of the covering
The cross sectional shape of section is different.
In preferred embodiments of the present invention, the length of the multistage of the covering vertically is not all the same.
In preferred embodiments of the present invention, the covering is divided into four sections vertically, the covering from pumping injection end to
Four sections of output end successively by not polishing, twin polishing, four mirror polish and octahedral polishing.
In preferred embodiments of the present invention, the twin polishing is relative polishing both surfaces, relative two burnishing surfaces
Between be two relative cambered surfaces.
In preferred embodiments of the present invention, the four sides is finished to two pairs of mutually perpendicular mirror polish of the line of centres, leans on
It is unpolished arc surface between two near burnishing surfaces.
In preferred embodiments of the present invention, absorption coefficient of the covering from pumping injection end to output end gradually increases
Greatly.
In preferred embodiments of the present invention, the gradual change absorption coefficient gain fibre also includes fibre core and coat, institute
State fibre core to be arranged in the covering, the coat is coated on the outer surface of the covering.
Second aspect, the embodiment of the present invention additionally provide a kind of optical system, and it includes gradual change as described above and absorbs system
Number gain fibre, laser and energy-transmission optic fibre, the laser connect with the energy-transmission optic fibre, the output end of the energy-transmission optic fibre
With the pumping injection end welding of the gradual change absorption coefficient gain fibre, the output end cross sectional shape of the energy-transmitting optical fibers at cladding and
The pumping injection end cross sectional shape of the gradual change absorption coefficient gain fibre covering is identical.
Gradual change absorption coefficient gain fibre provided in an embodiment of the present invention and optical system, by setting covering to have along axle
To the cross sectional shape gradually changed so that the covering have vertically and the cross sectional shape gradually changed corresponding to gradually
The absorption coefficient of change.The gain fibre with constant cross-section is compared in the axial direction of optical fiber in the prior art, and the present invention is logical
Cross and improve covering cross sectional shape vertically to regulate and control the absorption coefficient of covering, can make covering in fiber length not
Become to be more uniformly distributed with absorption of the position to pumping laser；In addition, by by gain fibre covering in the section of pumping input
It is shaped to identical with the output end cross sectional shape of energy-transmitting optical fibers at cladding, makes gain fibre and energy-transmission optic fibre matched well, can
Pumping injection end optical fiber overheat caused by significantly reduce because energy-transmission optic fibre and gain fibre matching are bad causes fusion point to burn
The risk ruined, improves the stability of system, and makes introduced details more convenient.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is the structural representation for the gradual change absorption coefficient gain fibre that first embodiment of the invention provides；
Fig. 2 is the signal that the gradual change absorption coefficient gain fibre that first embodiment of the invention provides coordinates with energy-transmission optic fibre
Figure；
Fig. 3 is the structural representation for four sections of coverings that first embodiment of the invention provides；
Fig. 4 is the schematic diagram for four sections of each cross sectional shapes of covering that first embodiment of the invention provides；
Fig. 5 is the structural representation for the optical system that second embodiment of the invention provides.
Icon：100- coverings；200- fibre cores；300- coats；400- energy-transmission optic fibres；500- lasers；1000- gradual changes are inhaled
Receive coefficient gain optical fiber；2000- optical systems.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.The present invention implementation being generally described and illustrated herein in the accompanying drawings
The component of example can be configured to arrange and design with a variety of.
Therefore, below the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
In the description of the invention, it is necessary to explanation, term " in ", " on ", " under ", "left", "right", " interior ", " outer "
Orientation or position relationship Deng instruction are based on orientation shown in the drawings or position relationship, or are used to during the invention product use
The orientation or position relationship often put, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply and be signified
Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the present invention
Limitation.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint phase
To importance.
In addition, the term such as term " level ", " vertical ", " pendency " is not offered as requiring part abswolute level or pendency, and
It is to be slightly tilted.Such as " level " only refers to that its direction is more horizontal with respect to for " vertical ", is not to represent the structure
Must be fully horizontal, but can be slightly tilted.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ",
" installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one
Connect body；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirect by intermediary
It is connected, can is the connection of two element internals.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
In addition, the term such as " input ", " output ", " feedback ", " formation " is understood as describing a kind of optics, electricity change
Or optics, electricity processing.As " is formationed " only refer to optical signal or electric signal by the element, instrument or device afterwards there occurs
Change optically or electrically so that the optical signal or the electric signal are processed, and then are obtained and implemented technical scheme
Or the signal required for solution technical problem.
In the specific embodiment accompanying drawing of the present invention, for more preferable, clearer description gradual change absorption coefficient gain light
The operation principle of each element in fine and optical system, the annexation of each several part in described device is showed, it is simply obvious to distinguish
Relative position relation between each element, it can not form to the optical path direction in element or structure, the order of connection and each several part
The restriction of structure size, size, shape.
First embodiment
Fig. 1 is refer to, present embodiments provides a kind of gradual change absorption coefficient gain fibre 1000, it includes covering 100, fibre
Core 200 and coat 300, the fibre core 200 are arranged in the covering 100, and the coat 300 is coated on the covering
100 outer surface.The covering 100 has the cross sectional shape gradually changed vertically, so that the covering 100 has vertically
With the cross sectional shape gradually changed corresponding to the absorption coefficient that gradually changes.Wherein, Fig. 2 is refer to, the covering 100
Pumping injection end cross sectional shape and for input pumping light the covering 100 of energy-transmission optic fibre 400 output end cross sectional shape matching.
The pumping injection end cross sectional shape of above-mentioned covering 100 and energy-transmission optic fibre 400 covering 100 for input pumping light
Output end cross sectional shape matches, and refers to the cutting in its pumping injection end of covering 100 of gradual change absorption coefficient gain fibre 1000
The cross sectional shape of face shape and energy-transmission optic fibre 400 in the one end connected with gradual change absorption coefficient gain fibre 1000 is roughly the same.
It is understood that the shape and size of the two coupling end faces are roughly the same, so as to exported from the output end of energy-transmission optic fibre 400
Pump light can smoothly be coupled into the gradual change absorption coefficient through the pumping injection end of gradual change absorption coefficient gain fibre 1000
In gain fibre 1000, so as to avoid producing pumping injection end because cross sectional shape is different and absorb the problem of too strong.
In the present embodiment, the axial direction refers to the central axial direction of optical fiber or covering 100, it can be understood as optical fiber or
The length direction of covering 100 or the transmission direction of laser.
In the present embodiment, as a preferred embodiment, the pumping injection end section of the covering 100 is circle,
Output end section is octagon.
Inventor passes through market survey, finds the light of transmission signal light used in the market and output high-power laser
Fibre on whole length direction is circular cross-section, by by the covering 100 in the present embodiment pumping injection end section shape
Shape is provided in round, and can enable gradual change absorption coefficient gain fibre 1000 and energy-transmission optic fibre 400 in good of pumping injection end
Match somebody with somebody, mismatched with solving circular energy-transmission optic fibre 400 in the prior art to octagon gain fibre, high heat caused by high-gain
The problem of burning fusion point etc. factor.
It is understood that corresponding to the energy-transmission optic fibre 400 of different output end cross sectional shapes, the gradual change absorption coefficient
The cross sectional shape of the covering 100 of gain fibre 1000 can be it is different, even if the pumping injection end cross sectional shape of covering 100 and
Output end cross sectional shape matching for the covering 100 of energy-transmission optic fibre 400 of input pumping light.
In the present embodiment, the pumping of the covering 100 injection end section is circle, and it is octagon to export end section, should
Structure can make pumping laser transmitted in the gradual change absorption coefficient gain fibre 1000 and gain during, covering 100
Uniform are kept to the gain profiles of light energy, and avoids the generation of vortex light simultaneously.
From formula of the prior art (1), the commercial Nufern 20/400LMA in existing fixed octagon section
YDF optical fiber, its absorption coefficient are usually 0.4dB/m@976nm, and linear absorption coefficient means pump light in above-mentioned gain fibre
In be exponential damping, i.e., above-mentioned optical fiber is uneven to the gain profiles of pumping laser, so as to cause optical-fiber laser gain not
Uniformly, the problems such as zlasing mode exported by gain is unstable is eventually resulted in.
In the present embodiment, on the one hand, the pumping injection end section of covering 100 and the output end interface of energy-transmission optic fibre 400
Match somebody with somebody, it is possible to reduce the gradual change absorption coefficient gain fibre 1000 is in absorption of the pumping injection end to pumping laser, reduction laser
Energy while avoids high fuel factor caused by excessive absorption, makes pumping injection end in the absorption loss of pumping injection end
Fused fiber splice, coating are more simple；On the other hand, the output end section of covering 100 is arranged to octagon, can make covering
100 gradually increase in the absorption coefficient of back segment, to avoid pumping laser in the exponential damping of gain back segment, make pumping laser from
The pumping injection end of gradual change absorption coefficient gain fibre 1000 to during the entire process of output end by uniform power gain, together
When avoid vortex light from producing, reach stable luminous power output.
In the present embodiment, the covering 100 is divided into multistage vertically, and adjacent two sections are cut in the multistage of the covering 100
Face shape is different.It is understood that to make the gain profiles of covering 100 uniform, its respective section of multistage vertically
Face shape can be change, i.e., each section different from another section adjacent of cross sectional shape.Wherein, multistage cross sectional shape
Combination can be diversified, and it can absorb the demand of distribution to design according to user to covering 100.
In embodiment, particularly, the length of the multistage of the covering 100 vertically is not all the same.In design covering 100
During the length of the multistage of middle different cross section shape, can by calculate under different cross section each section of respective absorption coefficient of covering 100,
To obtain length corresponding to each section of required different cross section.It is understood that in the feelings of specific cross sectional shape combination
Under condition, the length of the multistage of the covering 100 vertically can also be identical.
Fig. 3 is refer to, as a kind of preferred embodiment, the covering 100 is divided into four sections vertically, the covering
100 four sections from pumping injection end to output end successively by not polishing, twin polishing, four mirror polish and octahedral polishing.
It is understood that above-mentioned covering 100 four sections from pumping injection end to output end is not successively by polishing, being two-sided
Polishing, four mirror polish and octahedral polishing, it is believed that be four section of section of the covering 100 from pumping injection end to output end
Shape is followed successively by circular, two straight flanges of addition on the basis of first paragraph circle figure, added on the basis of first paragraph circle
Enter figure, the octagon of four straight flanges.
In the present embodiment, it is preferred that as shown in figure 4, the twin polishing is relative polishing both surfaces, i.e. this section of covering
It is two relative cambered surfaces between two relative burnishing surfaces in 100；It is orthogonal that the four sides is finished to two pairs of lines of centres
Mirror polish, i.e. be unpolished arc surface between two close burnishing surfaces of this section of covering 100.
In the structure shown in Fig. 4, cross sectional shape of the covering 100 from pumping injection end to output end obtain it is gentle and
Change symmetrically, its absorption coefficient gradually increase from pumping injection end to output end.
Inventor has found that in the preparation process of conventional gain optical fiber, the octagon polishing of prefabricated rods is one
Important step, the purpose is to avoid vortex light, increase the absorption coefficient of covering 100.Octagon polishing requires each face symmetrically,
Polished more or very few, opposite side is not parallel all to cause difficulty to the alignment of fibre core 200 in fusion process, influence beam quality and
Lasing efficiency.
And the gradual change absorption coefficient gain fibre 1000 in for the present embodiment, it is polished can be by being segmented polishing
Method.First, the absorption coefficient of covering 100 under the different interfaces shown in Fig. 4 is calculated, each section of optical fiber needed for preresearch estimates is corresponding
Length on preform；Segmentation polishing is carried out again, is selected in region used in preform according to previous calculating structure
Area carries out twin polishing, and now, except first paragraph does not polish, rear three sections of wholes of whole prefabricated rods have carried out twin polishing；Complete
Four mirror polish are carried out into twin polishing and then successively from pumping injection end to output end and octahedral polishes in the same way,
The absorption coefficient of each of which section all can ensure to absorb completely by accurate calculating；After polishing is completed, prefabricated rods are carried out
Fibre-optical drawing, it is final to obtain required gradual change absorption coefficient gain fibre 1000.
The gradual change absorption coefficient gain fibre 1000 that the present embodiment provides, absorb system mainly for octagon gain fibre
The problem of number is uneven is researched and developed.In fiber preparation, length is used by accurately calculating optical fiber, skill is polished using segmentation
Art, preform is subjected to segmentation polishing, then carries out wire drawing into fibre so that the section of optical fiber is progressively transitioned into positive eight from circle
Side shape, so as to obtain uniform gain profiles, it is too strong to avoid octagon gain fibre pumping injection end gain, and laser is defeated
The problem of going out to hold gain deficiency, while also solve the problems, such as octagon to round fiber welding, coating.
Second embodiment
Fig. 5 is refer to, the present embodiment additionally provides a kind of optical system 2000, and it includes laser 500, energy-transmission optic fibre
400 and above-mentioned first embodiment in the gradual change absorption coefficient gain fibre 1000 that provides.The laser 500 and the biography energy light
Fibre 400 connects, and the pumping injection end of the output end of the energy-transmission optic fibre 400 and the gradual change absorption coefficient gain fibre 1000 melts
Connect, the output end cross sectional shape of the covering 100 of energy-transmission optic fibre 400 and the covering of gradual change absorption coefficient gain fibre 1000
100 pumping injection end cross sectional shape is identical.
The pumping laser exported by laser 500 reaches the output end of the energy-transmission optic fibre 400, absorbs system by the gradual change
The pumping injection end of number gain fibre 1000 enters in gain fibre.
In the present embodiment, the pumping injection end of gradual change absorption coefficient gain fibre 1000 and the energy-transmission optic fibre 400 it is defeated
It is circle to go out end section, and gain fibre can be with the matched well of energy-transmission optic fibre 400, and absorption coefficient is relatively low, makes gain fibre
Welding, coating processing with energy-transmission optic fibre 400 is more easy, can significantly reduce the risk that fusion point burns, improve optics
The stability of system 2000.
In summary, gradual change absorption coefficient gain fibre provided in an embodiment of the present invention and optical system, wrapped by setting
Layer has the cross sectional shape gradually changed vertically, so that the covering has vertically and the cross sectional shape gradually changed
The corresponding absorption coefficient gradually changed.There is the gain fibre phase of constant cross-section in the axial direction of optical fiber in the prior art
Than the present invention regulates and controls the absorption coefficient of covering by improving the cross sectional shape of covering vertically, and covering can be made to be grown in optical fiber
Absorption of the diverse location to pumping laser on degree direction becomes to be more uniformly distributed；In addition, by by gain fibre covering in pumping
The cross sectional shape of input is arranged to identical with the output end cross sectional shape of energy-transmitting optical fibers at cladding, makes gain fibre and energy-transmission optic fibre
Matched well, pumping injection end optical fiber caused by because energy-transmission optic fibre and gain fibre matching are bad can be significantly reduced and cross thermal conductivity
The risk for causing fusion point to burn, improves the stability of system, and make introduced details more convenient.It the foregoing is only the present invention
Preferred embodiment, be not intended to limit the invention, for those skilled in the art, the present invention can have various
Change and change.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., all should include
Within protection scope of the present invention.
Claims (10)
1. a kind of gradual change absorption coefficient gain fibre, it is characterised in that including covering, the covering has vertically to be gradually changed
Cross sectional shape, the covering have vertically and the cross sectional shape gradually changed corresponding to the absorption system that gradually changes
Number,
Wherein, the pumping injection end cross sectional shape of the covering and the output end for the energy-transmitting optical fibers at cladding of input pumping light are cut
Face form fit.
2. gradual change absorption coefficient gain fibre according to claim 1, it is characterised in that the pumping injection end of the covering
Section is circle, and output end section is octagon.
3. gradual change absorption coefficient gain fibre according to claim 2, it is characterised in that the covering is divided into more vertically
Section, adjacent two sections of cross sectional shape is different in the multistage of the covering.
4. gradual change absorption coefficient gain fibre according to claim 3, it is characterised in that the multistage of the covering is vertically
Length it is not all the same.
5. gradual change absorption coefficient gain fibre according to claim 3, it is characterised in that the covering is divided into four vertically
Section, the covering four sections from pumping injection end to output end successively by not polishing, twin polishing, four mirror polish and octahedral throw
Light processing.
6. gradual change absorption coefficient gain fibre according to claim 5, it is characterised in that the twin polishing is relative
Polishing both surfaces, it is two relative cambered surfaces between relative two burnishing surfaces.
7. gradual change absorption coefficient gain fibre according to claim 5, it is characterised in that the four sides is finished to two centerings
The mutually perpendicular mirror polish of heart line, it is unpolished arc surface between close two burnishing surfaces.
8. gradual change absorption coefficient gain fibre according to claim 5, it is characterised in that the covering is from pumping injection end
Absorption coefficient to output end gradually increases.
9. gradual change absorption coefficient gain fibre according to claim 1, it is characterised in that the gradual change absorption coefficient gain
Optical fiber also includes fibre core and coat, and the fibre core is arranged in the covering, and the coat is outer coated on the covering
Surface.
10. a kind of optical system, it is characterised in that including the gradual change absorption coefficient gain as described in any one of claim 1 to 9
Optical fiber, laser and energy-transmission optic fibre, the laser connect with the energy-transmission optic fibre, the output end of the energy-transmission optic fibre and described
The pumping injection end welding of gradual change absorption coefficient gain fibre, the output end cross sectional shape of the energy-transmitting optical fibers at cladding and it is described gradually
The pumping injection end cross sectional shape for becoming absorption coefficient gain fibre covering is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952600.1A CN107561635A (en) | 2017-10-13 | 2017-10-13 | Gradual change absorption coefficient gain fibre and optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952600.1A CN107561635A (en) | 2017-10-13 | 2017-10-13 | Gradual change absorption coefficient gain fibre and optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107561635A true CN107561635A (en) | 2018-01-09 |
Family
ID=60985591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710952600.1A Pending CN107561635A (en) | 2017-10-13 | 2017-10-13 | Gradual change absorption coefficient gain fibre and optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107561635A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398802A (en) * | 2019-08-01 | 2019-11-01 | 中国工程物理研究院激光聚变研究中心 | A kind of fiber fabrication methods |
| CN112142319A (en) * | 2020-11-26 | 2020-12-29 | 武汉光谷航天三江激光产业技术研究院有限公司 | Axial absorption gradient optical fiber, preparation method thereof and optical fiber laser |
| CN114268010A (en) * | 2022-03-02 | 2022-04-01 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber amplifier |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410788A (en) * | 2002-12-27 | 2003-04-16 | 燕山大学 | Double cladded plastic amplifier optical fibre |
| US20040252946A1 (en) * | 2003-06-13 | 2004-12-16 | Digiovanni David J. | Cladding pumped optical fiber gain devices |
| CN1564033A (en) * | 2004-03-29 | 2005-01-12 | 烽火通信科技股份有限公司 | Double cladding rare-earth doped optical fiber and its mfg. method |
| JP2007165822A (en) * | 2005-08-03 | 2007-06-28 | Fujikura Ltd | Optical pumping device, optical amplifier, fiber laser, and multi-core fiber for optical pumping device |
| CN101398511A (en) * | 2008-09-28 | 2009-04-01 | 中国电子科技集团公司第四十六研究所 | Double clad optical fiber for laser unit |
| CN101884146A (en) * | 2007-10-03 | 2010-11-10 | 坦佩雷科技大学光电子研究中心 | The manufacture method of Active Optical Fiber and Active Optical Fiber |
| CN201937160U (en) * | 2011-01-28 | 2011-08-17 | 杭州华威药业有限公司 | Low-power optical fiber laser device |
| CN202068084U (en) * | 2010-11-05 | 2011-12-07 | 山西飞虹激光科技有限公司 | Fiber transverse plane coupler |
| CN102992613A (en) * | 2012-12-25 | 2013-03-27 | 长飞光纤光缆有限公司 | Rare-earth uniformly-doped fiber perform core rod and preparation method thereof |
| CN103091779A (en) * | 2011-11-08 | 2013-05-08 | 福州高意通讯有限公司 | High-power optical fiber coupler and manufacture method thereof |
| CN103777271A (en) * | 2013-11-27 | 2014-05-07 | 清华大学 | Fiber, fiber oscillator and fiber amplifier |
| CN106396360A (en) * | 2016-08-30 | 2017-02-15 | 武汉睿芯特种光纤有限责任公司 | Method for preparing gain fiber through online fusion shrinking and drawing |
| CN106405728A (en) * | 2016-10-12 | 2017-02-15 | 长飞光纤光缆股份有限公司 | Rare-earth-doped double-clad fiber and preparation method thereof |
| CN207366781U (en) * | 2017-10-13 | 2018-05-15 | 中国工程物理研究院激光聚变研究中心 | Gradual change absorption coefficient gain fibre and optical system |
-
2017
- 2017-10-13 CN CN201710952600.1A patent/CN107561635A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410788A (en) * | 2002-12-27 | 2003-04-16 | 燕山大学 | Double cladded plastic amplifier optical fibre |
| US20040252946A1 (en) * | 2003-06-13 | 2004-12-16 | Digiovanni David J. | Cladding pumped optical fiber gain devices |
| CN1564033A (en) * | 2004-03-29 | 2005-01-12 | 烽火通信科技股份有限公司 | Double cladding rare-earth doped optical fiber and its mfg. method |
| JP2007165822A (en) * | 2005-08-03 | 2007-06-28 | Fujikura Ltd | Optical pumping device, optical amplifier, fiber laser, and multi-core fiber for optical pumping device |
| CN101884146A (en) * | 2007-10-03 | 2010-11-10 | 坦佩雷科技大学光电子研究中心 | The manufacture method of Active Optical Fiber and Active Optical Fiber |
| CN101398511A (en) * | 2008-09-28 | 2009-04-01 | 中国电子科技集团公司第四十六研究所 | Double clad optical fiber for laser unit |
| CN202068084U (en) * | 2010-11-05 | 2011-12-07 | 山西飞虹激光科技有限公司 | Fiber transverse plane coupler |
| CN201937160U (en) * | 2011-01-28 | 2011-08-17 | 杭州华威药业有限公司 | Low-power optical fiber laser device |
| CN103091779A (en) * | 2011-11-08 | 2013-05-08 | 福州高意通讯有限公司 | High-power optical fiber coupler and manufacture method thereof |
| CN102992613A (en) * | 2012-12-25 | 2013-03-27 | 长飞光纤光缆有限公司 | Rare-earth uniformly-doped fiber perform core rod and preparation method thereof |
| CN103777271A (en) * | 2013-11-27 | 2014-05-07 | 清华大学 | Fiber, fiber oscillator and fiber amplifier |
| CN106396360A (en) * | 2016-08-30 | 2017-02-15 | 武汉睿芯特种光纤有限责任公司 | Method for preparing gain fiber through online fusion shrinking and drawing |
| CN106405728A (en) * | 2016-10-12 | 2017-02-15 | 长飞光纤光缆股份有限公司 | Rare-earth-doped double-clad fiber and preparation method thereof |
| CN207366781U (en) * | 2017-10-13 | 2018-05-15 | 中国工程物理研究院激光聚变研究中心 | Gradual change absorption coefficient gain fibre and optical system |
Non-Patent Citations (1)
| Title |
|---|
| 郑晶晶;宁提纲;王圻;: "双包层光纤内包层形状对吸收效率的影响分析", 光子技术, no. 04, 30 December 2005 (2005-12-30) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110398802A (en) * | 2019-08-01 | 2019-11-01 | 中国工程物理研究院激光聚变研究中心 | A kind of fiber fabrication methods |
| CN112142319A (en) * | 2020-11-26 | 2020-12-29 | 武汉光谷航天三江激光产业技术研究院有限公司 | Axial absorption gradient optical fiber, preparation method thereof and optical fiber laser |
| CN112142319B (en) * | 2020-11-26 | 2021-03-16 | 武汉光谷航天三江激光产业技术研究院有限公司 | Axial absorption gradient optical fiber, preparation method thereof and optical fiber laser |
| CN114268010A (en) * | 2022-03-02 | 2022-04-01 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber amplifier |
| CN114268010B (en) * | 2022-03-02 | 2022-06-14 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber amplifier |
| WO2023165109A1 (en) * | 2022-03-02 | 2023-09-07 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100427979C (en) | Laser power integrated device and its implement method | |
| EP0469792B1 (en) | Optical communication system comprising a fiber amplifier | |
| US5864644A (en) | Tapered fiber bundles for coupling light into and out of cladding-pumped fiber devices | |
| CN204256211U (en) | A kind of low loss fiber mould field adaptation with the all-fiber peeling off function | |
| CN107561635A (en) | Gradual change absorption coefficient gain fibre and optical system | |
| CN105633778A (en) | High-order-mode filtering optical fiber end surface pumping coupler and manufacture method thereof | |
| CN109154699A (en) | Optical fiber and optical fibre device | |
| CN102866462A (en) | Optical fiber mode field adapter capable of realizing low-loss conversion of diameter of LP01 mode field | |
| US10879665B2 (en) | Optical amplifying systems and methods | |
| CN103412369A (en) | Optical fiber beam combiner and preparation method thereof | |
| CN102967981A (en) | Super-continuous spectrum light source based on multicore photonic crystal fiber | |
| CN207366781U (en) | Gradual change absorption coefficient gain fibre and optical system | |
| CN202995205U (en) | Multicore photonic crystal fiber based supercontinuum source | |
| US11245241B2 (en) | Optical fiber for a fiber laser, fiber laser, and production method for optical fiber for a fiber laser | |
| CN205427234U (en) | Mould field adapter and fiber laser | |
| CN106253038A (en) | A kind of middle-infrared band optical fiber pumping/signal bundling device | |
| CN104330848A (en) | Optical fiber power beam combiner with high mode field duty ratio | |
| Lin et al. | Fabrication and laser performance of cladding uniform core tapered fiber | |
| CN105281185A (en) | Multi-core fiber laser and preparation method of the same | |
| CN109244809A (en) | Zone coating end cap group with unstable inhibition mode and application thereof | |
| CN111039559B (en) | Multi-optical-fiber high-speed rotary wiredrawing side fusion beam combining device and method | |
| CN113359229A (en) | Laser fiber with gradually-changed radial doping concentration and preparation method thereof | |
| CN112713490A (en) | Intermediate infrared band continuous all-fiber oscillator | |
| CN109387904A (en) | A kind of fiber laser combiner and its manufacturing method | |
| CN107500524B (en) | Rare earth doped optical fiber preform and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |