CN105511088B - Large-power optical fiber output system with cladding light filtering function - Google Patents
Large-power optical fiber output system with cladding light filtering function Download PDFInfo
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- CN105511088B CN105511088B CN201610042386.1A CN201610042386A CN105511088B CN 105511088 B CN105511088 B CN 105511088B CN 201610042386 A CN201610042386 A CN 201610042386A CN 105511088 B CN105511088 B CN 105511088B
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- optical fiber
- end caps
- water
- cladding light
- filtering function
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Lasers (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a kind of large-power optical fiber output system with cladding light filtering function, including the output tail optical fiber of doubly clad optical fiber, end caps, encapsulation fixture and Water-cooling circulating component；Fibre core is attached with end caps by welding in the output tail optical fiber of doubly clad optical fiber, fibre core is being encapsulated in fixture with end caps by glue package, high refractive index material layer is provided with end caps, for absorbing the cladding light diffused in end caps and forming heat energy；Encapsulation fixture is connected with Water-cooling circulating component, and cooling operations are carried out to end caps by Water-cooling circulating component.The present invention have the advantages that it is simple in construction, simple for production, cladding light can be improved filter out ability, improve fibre core laser and export ability to bear.
Description
Technical field
Present invention relates generally to optical fiber laser and fiber amplifier field, and refering in particular to one kind has cladding light filtering function
Large-power optical fiber output system.
Background technology
In the last few years, optical fiber laser was due to high conversion efficiency, good beam quality, compact-sized, easy heat radiation, work
The advantages that stability is good, have been widely used for the numerous areas such as industrial processes, biological medicine and national defense and military.With double clad
The maturation of pumped fiber technology and the improvement of optic fibre manufacture process, the power output of optical fiber laser are also constantly lifted.
Will be double in the optical fiber laser and amplifier using doubly clad optical fiber pump technology, it is necessary to before optical fiber output
Pump light and laser in the inner cladding of cladded-fiber filter out, and improve the beam quality of output light.Existing technology is by double-contracting
One section of coat of layer optical fiber divests, and the inner cladding for exposing is dipped into high-index material so that original to be all-trans
The condition of penetrating is destroyed, and cladding light is filtered out so as to realize.But absorption of the high-index material for cladding light and it is converted into
Heat energy mainly still occurs in inner cladding and high-index material contact surface near zone, and this can cause the heat energy of conversion in very little
Volume in accumulate, temperature rises the too fast threshold value that can bear more than material, and bag can be filtered out so as to limit this method
The power of layer light.
On the other hand, optical fiber output end face light injury and heat load also cause high-power output to face big challenge.By
In laser transmitted in a diameter of tens microns of fiber core, this means that fibre core optical density is very under the conditions of high-power
Height, easily bring damage.Especially for optical fiber output end face, due to it is inevitable in post-processing the defects of, it is easy to damage
Bad end face, bring heavy damage.On the other hand, laser from optical fiber output travel in air when, due to the difference of the two refractive index
Different, light echo caused by reflection can bring deleterious effect, while the heat accumulation near output end face to the laser structure of front end
Load, further increase the destruction possibility of fiber-optic output.
The content of the invention
The technical problem to be solved in the present invention is that：For technical problem existing for prior art, the present invention provides one
It is kind simple in construction, simple for production, can improve cladding light filters out ability, improve fibre core laser output ability to bear there is covering
The large-power optical fiber output system of light filtering function.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of large-power optical fiber output system with cladding light filtering function, including the output tail optical fiber of doubly clad optical fiber,
End caps, encapsulation fixture and Water-cooling circulating component；Fibre core passes through with end caps in the output tail optical fiber of the doubly clad optical fiber
Welding is attached, and the fibre core is being encapsulated in fixture with end caps by glue package, is set in the end caps
There is high refractive index material layer, for absorbing the cladding light diffused in end caps and forming heat energy；The encapsulation fixture and water
SAPMAC method component is connected, and cooling operations are carried out to end caps by Water-cooling circulating component.
As a further improvement on the present invention：The Water-cooling circulating component include external jacket, water inlet, inner cycle channel,
Outside the circular channels and delivery port, the external jacket are connected with encapsulation fixture, and the inner cycle channel is inside encapsulation fixture, institute
Outside the circular channels are stated between encapsulation fixture and external jacket, pass through limbers between the inner cycle channel and outside the circular channels
Connection.
As a further improvement on the present invention：The cooling water of low temperature enters inner cycle channel from the water inlet, to height
Heat energy carries out water-cooled process formed in refractive index material, then enters outside the circular channels by limbers, finally from water outlet
Mouth discharge.
As a further improvement on the present invention：The external jacket of the encapsulation fixture and Water-cooling circulating component passes through screw thread and company
Contact is attached.
As a further improvement on the present invention：The end caps are fiber glass end cap.
Compared with prior art, the advantage of the invention is that：
1st, the large-power optical fiber output system with cladding light filtering function of the invention, with the end caps with anti-reflection film
As output, the ability to bear that fibre core laser exports is improved.
2nd, the large-power optical fiber output system with cladding light filtering function of the invention, fiber-optic output cap are integrated with bag
Layer light filtering function, is used directly for high power fiber laser and amplifier with cladding light.
3rd, the large-power optical fiber output system with cladding light filtering function of the invention, utilizes fiber glass end cap side table
Face carries out cladding light and filtered out, and improves the power level that cladding light filters out.
4th, the large-power optical fiber output system with cladding light filtering function of the invention, filters out to cladding light and adds water
SAPMAC method system, further improve cladding light and filter out ability.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the present invention.
Fig. 2 is the present invention principle schematic that cladding light filters out in concrete application example.
Fig. 3 is present invention Water-cooling circulating system structure diagram in concrete application example.
Marginal data：
11st, fibre core；14th, laser；16th, cladding light；21st, end caps；22nd, output face；23rd, high refractive index material layer；24、
Encapsulate fixture；25th, limbers；31st, external jacket；32nd, screw thread；33rd, tie point；34th, water inlet；35th, delivery port；37th, interior circulation
Passage；38th, outside the circular channels.
Embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.
As shown in figure 1, the large-power optical fiber output system with cladding light filtering function of the present invention, including double clad light
Fine output tail optical fiber, end caps 21, encapsulation fixture 24 and Water-cooling circulating component；Doubly clad optical fiber prime need not do special place
Reason, directly can be connected with the output tail optical fiber of doubly clad optical fiber.Fibre core 11 and end caps in the output tail optical fiber of doubly clad optical fiber
21 are attached by welding, and fibre core 11 is being encapsulated in fixture 24 with end caps 21 by glue package, end caps 21
High refractive index material layer 23 is inside provided with, for absorbing the cladding light 16 diffused in end caps 21 and forming heat energy；Encapsulation
Fixture 24 is connected with Water-cooling circulating component, and cooling operations are carried out to end caps 21 by Water-cooling circulating component.
Referring to Fig. 2, the principle schematic filtered out for cladding light of the present invention, laser 14 in doubly clad optical fiber are given（Fibre core
11 flashlight）With cladding light 16（Clad pumping optical）Propagation path.Because the output tail optical fiber not to doubly clad optical fiber enters
Row is handled, and the laser 14 and cladding light 16 in fibre core 11 will enter end caps 21 together（Fiber glass end cap）In.When two kinds
Light, will be in light because the two original waveguiding structure has all destroyed after doubly clad optical fiber is entered in end caps 21
Dissipated in fine end cap 21 by respective numerical aperture.The numerical aperture of laser 14 is generally NA=0.06, corresponding space in fibre core 11
The angle of divergence is θ ≈ 0.06, directly will be exported from the output face 22 of end caps 21.The numerical aperture of cladding light 16 be generally NA=
0.46, corresponding space divergence angle is θ ≈ 0.46, and the side surface of end caps 21 will be gradually diffused in communication process, and then
Travel in high refractive index material layer 23 and form heat energy.
Referring to Fig. 3, in concrete application example, Water-cooling circulating component includes external jacket 31, water inlet 34, inner cycle channel
37th, outside the circular channels 38 and delivery port 35, external jacket 31 are connected with encapsulation fixture 24, and inner cycle channel 37 is positioned at encapsulation fixture 24
Inside, outside the circular channels 38 are between encapsulation fixture 24 and external jacket 31, between inner cycle channel 37 and outside the circular channels 38
Connected by limbers 25.During work, the cooling water of low temperature enters inner cycle channel 37 from water inlet 34, and directly height is reflected
Heat energy carries out water-cooled process formed in rate material layer 23, then enters outside the circular channels 38 by limbers 25, finally from going out
Discharge at the mouth of a river 35.
In the present embodiment, the external jacket 31 for encapsulating fixture 24 and Water-cooling circulating component is carried out by screw thread 32 and tie point 33
Connection.
As from the foregoing, it is double to reduce high power fiber laser and amplifier output using glass optical fiber end cap by the present invention
The power density of cladded-fiber, cladding light 16 is filtered out according to the numerical aperture difference of cladding light 16 and laser 14, together
When by the laser 14 in fibre core 11 by anti-reflection film from the cap output face of glass optical fiber end export.The cladding light 16 filtered out is converted into heat
The cooling water flowed after energy is taken away, the power that further raising system can bear.I.e. the present invention is directed to existing cladding light 16
The limitation of filtering method, with reference to the characteristics of the cap of glass optical fiber end, propose to carry out cladding light using glass optical fiber end cap side
16 methods filtered out., can be gradual in communication process because laser 14 and cladding light 16 are there is obvious numerical aperture difference
Separation, thus the difference of the two angle of divergence can be utilized to make a distinction so that laser 14 is straight by the cap output face of glass optical fiber end
Output is connect, and cladding light 16 is exported to be filtered out by the side of glass optical fiber end cap.Therefore, the present invention can improve entirely
The power output upper limit that light laser and amplifier output system can bear.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
For those of ordinary skill, some improvements and modifications without departing from the principles of the present invention, the protection of the present invention should be regarded as
Scope.
Claims (5)
1. a kind of large-power optical fiber output system with cladding light filtering function, it is characterised in that including doubly clad optical fiber
Export tail optical fiber, end caps（21）, encapsulation fixture（24）And Water-cooling circulating component；It is fine in the output tail optical fiber of the doubly clad optical fiber
Core（11）With end caps（21）It is attached by welding, the fibre core（11）With end caps（21）Pass through glue package
In encapsulation fixture（24）It is interior, the end caps（21）Inside it is provided with high refractive index material layer（23）, light is diffused to for absorbing
Fine end cap（21）In cladding light（16）And form heat energy；The encapsulation fixture（24）It is connected with Water-cooling circulating component, passes through water
SAPMAC method component is to end caps（21）Carry out cooling operations.
2. the large-power optical fiber output system according to claim 1 with cladding light filtering function, it is characterised in that institute
Stating Water-cooling circulating component includes external jacket（31）, water inlet（34）, inner cycle channel（37）, outside the circular channels（38）And delivery port
（35）, the external jacket（31）With encapsulating fixture（24）Connection, the inner cycle channel（37）Positioned at encapsulation fixture（24）Inside,
The outside the circular channels（38）Positioned at encapsulation fixture（24）With external jacket（31）Between, the inner cycle channel（37）And outer circulation
Passage（38）Between pass through limbers（25）Connection.
3. the large-power optical fiber output system according to claim 2 with cladding light filtering function, it is characterised in that low
The cooling water of temperature is from the water inlet（34）Into inner cycle channel（37）, to high refractive index material layer（23）Formed in heat
Water-cooled process can be carried out, then passes through limbers（25）Into outside the circular channels（38）, finally from delivery port（35）Discharge.
4. the large-power optical fiber output system according to claim 2 with cladding light filtering function, it is characterised in that institute
State encapsulation fixture（24）With the external jacket of Water-cooling circulating component（31）Pass through screw thread（32）And tie point（33）It is attached.
5. the large-power optical fiber output system with cladding light filtering function according to claim 1 or 2 or 3 or 4, it is special
Sign is, the end caps（21）For fiber glass end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042386.1A CN105511088B (en) | 2016-01-22 | 2016-01-22 | Large-power optical fiber output system with cladding light filtering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042386.1A CN105511088B (en) | 2016-01-22 | 2016-01-22 | Large-power optical fiber output system with cladding light filtering function |
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| Publication Number | Publication Date |
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| CN105511088A CN105511088A (en) | 2016-04-20 |
| CN105511088B true CN105511088B (en) | 2018-01-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772787B (en) * | 2017-02-08 | 2019-04-05 | 中科先为激光科技（北京）有限公司 | For filtering out the optical fiber of cladding light and using its cladding light stripper |
| CN107591667A (en) * | 2017-08-11 | 2018-01-16 | 西南技术物理研究所 | A kind of novel efficient radiating high power optical fibre laser export head |
| CN113050225A (en) * | 2021-06-02 | 2021-06-29 | 北京凯普林光电科技股份有限公司 | Optical fiber connector structure with anti-reflection function |
| CN115275746A (en) * | 2022-07-21 | 2022-11-01 | 中国人民解放军国防科技大学 | Integrated high-power optical fiber laser output system based on gas refrigeration |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102902030B (en) * | 2011-07-29 | 2013-12-25 | 山西飞虹激光科技有限公司 | Energy transfer optical cable for high-power laser transmission |
| DE102011087854B4 (en) * | 2011-12-07 | 2022-07-21 | Jenoptik Optical Systems Gmbh | Light guide with an optical fiber and a mode stripper |
| CN203519869U (en) * | 2013-10-09 | 2014-04-02 | 深圳朗光科技有限公司 | Fiber packaging structure |
| CN103490273A (en) * | 2013-10-10 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical fiber transmission system |
| CN103676051B (en) * | 2013-11-29 | 2015-09-30 | 深圳市创鑫激光股份有限公司 | Myriawatt-level high-power optical fiber end cap |
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