CN105511088A - High-power optical fiber output system with cladding light filtering-out function - Google Patents
High-power optical fiber output system with cladding light filtering-out function Download PDFInfo
- Publication number
- CN105511088A CN105511088A CN201610042386.1A CN201610042386A CN105511088A CN 105511088 A CN105511088 A CN 105511088A CN 201610042386 A CN201610042386 A CN 201610042386A CN 105511088 A CN105511088 A CN 105511088A
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- Prior art keywords
- optical fiber
- end cap
- cladding light
- water
- fiber end
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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
Abstract
The invention discloses a high-power optical fiber output system with the cladding light filtering-out function. The system comprises an output tail fiber of a double-cladding optical fiber, an optical fiber end cap, a packaging clamp and a water cooling circulation assembly. A fiber core in the output tail fiber of the double-cladding optical fiber is connected with the optical fiber end cap in a fused mode, the fiber core and the optical fiber end cap are both packaged into the packaging clamp through glue, and a high-refractive-index material layer is arranged in the optical fiber end cap and used for absorbing cladding light diffused into the optical fiber end cap to form heat energy. The packaging clamp is connected with the water cooling circulation assembly, and the optical fiber end cap is cooled through the water cooling circulation assembly. The system has the advantages of being simple in structure, easy and convenient to manufacture, capable of improving cladding light filtering-out capacity and fiber core laser output bearing capacity and the like.
Description
Technical field
The present invention is mainly concerned with fiber laser and fiber amplifier field, refers in particular to a kind of large-power optical fiber output system with cladding light filtering function.
Background technology
In the last few years, fiber laser is the advantage such as conversion efficiency is high, good beam quality, compact conformation, easy heat radiation, good operating stability owing to having, and had been widely used in the numerous areas such as industrial processes, biological medicine and national defense and military.Along with the maturation of doubly clad optical fiber pump technology and the improvement of optic fibre manufacture process, the output power of fiber laser also constantly promotes.
In the fiber laser adopting doubly clad optical fiber pump technology and amplifier, need, by the pump light in the inner cladding of doubly clad optical fiber and laser filtering before optical fiber exports, to improve the beam quality exporting light.Existing technology is divested by one of doubly clad optical fiber section of coat, is dipped in high-index material, original total reflection condition is destroyed by exposed inner cladding out, thus realize the filtering to cladding light.But high-index material for cladding light absorption and be converted into heat energy and mainly still occur in inner cladding and high-index material surface of contact near zone, this can make the heat energy transformed accumulate in very little volume, temperature rises the too fast threshold value exceeding material and can bear, thus limits the power of this method institute energy filtering cladding light.
On the other hand, the optical damage in fiber-optic output face and heat load also make high-power output face big challenge.Because laser transmits in the fiber core that diameter is tens microns, this just means that core light density is very high under high-power condition, easily brings damage.Especially for fiber-optic output face, due to defect inevitable in post-processed, be easy to damage end face, bring havoc.On the other hand, when laser propagates into air from optical fiber output, due to the difference of the two refractive index, reflecting the light echo caused can bring bad impact to the laser structure of front end, heat accumulation load near output end face simultaneously, strengthens the destruction possibility of fiber-optic output further.
Summary of the invention
The technical problem to be solved in the present invention is just: the technical matters existed for prior art, the invention provides the large-power optical fiber output system with cladding light filtering function that a kind of structure is simple, simple for production, can improve cladding light filtering ability, improve fibre core Laser output ability to bear.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
There is a large-power optical fiber output system for cladding light filtering function, comprise the output tail optical fiber of doubly clad optical fiber, optical fiber end cap, encapsulation fixture and Water-cooling circulating assembly; In the output tail optical fiber of described doubly clad optical fiber, fibre core is connected by welding with optical fiber end cap, described fibre core and optical fiber end cap all by glue package encapsulating in fixture, be provided with high refractive index material layer in described optical fiber end cap, be used for absorbing the cladding light that diffuses in optical fiber end cap and form heat energy; Described encapsulation fixture is connected with Water-cooling circulating assembly, carries out cooling operations by Water-cooling circulating assembly to optical fiber end cap.
As a further improvement on the present invention: described Water-cooling circulating assembly comprises external jacket, water inlet, inner cycle channel, outer circulation passage and water delivering orifice, described external jacket is connected with encapsulation fixture, it is inner that described inner cycle channel is positioned at encapsulation fixture, described outer circulation passage, between packaging clip tool and external jacket, is communicated with by limbers between described inner cycle channel and outer circulation passage.
As a further improvement on the present invention: the chilled water of low temperature enters inner cycle channel from described water inlet, in high refractive index material layer form heat energy and carry out water-cooled process, then enter outer circulation passage by limbers, finally discharge from water delivering orifice.
As a further improvement on the present invention: described encapsulation fixture is connected with tie point by screw thread with the external jacket of Water-cooling circulating assembly.
As a further improvement on the present invention: described optical fiber end cap is fiber glass end cap.
Compared with prior art, the invention has the advantages that:
1, the large-power optical fiber output system with cladding light filtering function of the present invention, using the optical fiber end cap with anti-reflection film as output, improves the ability to bear of fibre core Laser output.
2, the large-power optical fiber output system with cladding light filtering function of the present invention, fiber-optic output cap is integrated with cladding light filtering function, can be directly used in high power fiber laser and the amplifier of band cladding light.
3, the large-power optical fiber output system with cladding light filtering function of the present invention, utilizes fiber glass end cap side surface to carry out cladding light filtering, improves the power level of cladding light filtering.
4, the large-power optical fiber output system with cladding light filtering function of the present invention, adds water-cooling circulating system to cladding light filtering, improves cladding light filtering ability further.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention.
Fig. 2 is the principle schematic of the present invention's cladding light filtering in embody rule example.
Fig. 3 is the present invention's water-cooling circulating system structural representation in embody rule example.
Marginal data:
11, fibre core; 14, laser; 16, cladding light; 21, optical fiber end cap; 22, output face; 23, high refractive index material layer; 24, fixture is encapsulated; 25, limbers; 31, external jacket; 32, screw thread; 33, tie point; 34, water inlet; 35, water delivering orifice; 37, inner cycle channel; 38, outer circulation passage.
Embodiment
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
As shown in Figure 1, the large-power optical fiber output system with cladding light filtering function of the present invention, comprises the output tail optical fiber of doubly clad optical fiber, optical fiber end cap 21, encapsulation fixture 24 and Water-cooling circulating assembly; Doubly clad optical fiber prime does not need to do special processing, can directly be connected with the output tail optical fiber of doubly clad optical fiber.In the output tail optical fiber of doubly clad optical fiber, fibre core 11 is connected by welding with optical fiber end cap 21, fibre core 11 and optical fiber end cap 21 all by glue package encapsulating in fixture 24, be provided with high refractive index material layer 23 in optical fiber end cap 21, be used for absorbing the cladding light 16 that diffuses in optical fiber end cap 21 and form heat energy; Encapsulation fixture 24 is connected with Water-cooling circulating assembly, carries out cooling operations by Water-cooling circulating assembly to optical fiber end cap 21.
See Fig. 2, be the principle schematic of cladding light filtering of the present invention, give the flashlight of laser 14(fibre core 11 in doubly clad optical fiber) and cladding light 16(clad pumping optical) travel path.Owing to not processing the output tail optical fiber of doubly clad optical fiber, the laser 14 in fibre core 11 and cladding light 16 will together with enter optical fiber end cap 21(fiber glass end cap) in.After two kinds of light enter into optical fiber end cap 21 from doubly clad optical fiber, because the two original waveguiding structure all destroys, disperse in optical fiber end cap 21 by respective numerical aperture.In fibre core 11, the numerical aperture of laser 14 is generally NA=0.06, and corresponding space divergence angle is θ ≈ 0.06, the direct output face 22 from optical fiber end cap 21 is exported.The numerical aperture of cladding light 16 is generally NA=0.46, and corresponding space divergence angle is θ ≈ 0.46, will diffuse to the side surface of optical fiber end cap 21 gradually in communication process, and then propagates in high refractive index material layer 23 and form heat energy.
See Fig. 3, in embody rule example, Water-cooling circulating assembly comprises external jacket 31, water inlet 34, inner cycle channel 37, outer circulation passage 38 and water delivering orifice 35, external jacket 31 is connected with encapsulation fixture 24, it is inner that inner cycle channel 37 is positioned at encapsulation fixture 24, outer circulation passage 38, between encapsulation fixture 24 and external jacket 31, is communicated with by limbers 25 between inner cycle channel 37 and outer circulation passage 38.During work, the chilled water of low temperature enters inner cycle channel 37 from water inlet 34, directly in high refractive index material layer 23 form heat energy and carry out water-cooled process, then enter outer circulation passage 38 by limbers 25, finally discharge from water delivering orifice 35.
In the present embodiment, encapsulation fixture 24 is connected with tie point 33 by screw thread 32 with the external jacket 31 of Water-cooling circulating assembly.
As from the foregoing, the present invention adopts glass optical fiber end cap to reduce the power density of high power fiber laser and amplifier output doubly clad optical fiber, numerical aperture difference according to cladding light 16 and laser 14 carries out filtering to cladding light 16, is derived by the laser 14 in fibre core 11 by anti-reflection film from the output face of glass optical fiber end cap simultaneously.Taken away by the chilled water flowed after the cladding light 16 of filtering is converted into heat energy, the power that further raising system can bear.Namely the present invention is directed to the limitation of existing cladding light 16 filtering method, in conjunction with the feature of glass optical fiber end cap, propose to utilize glass optical fiber end cap side to carry out the method for cladding light 16 filtering.Because laser 14 and cladding light 16 also exist obvious numerical aperture difference, can be separated gradually in communication process, thus the difference of the two angle of divergence can be utilized to distinguish, laser 14 is directly exported by the output face of glass optical fiber end cap, and cladding light 16 is exported by the side of glass optical fiber end cap and carry out filtering.For this reason, the present invention can improve the output power upper limit that whole light laser and amplifier output system can bear.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.
Claims (5)
1. there is a large-power optical fiber output system for cladding light filtering function, it is characterized in that, comprise the output tail optical fiber of doubly clad optical fiber, optical fiber end cap (21), encapsulation fixture (24) and Water-cooling circulating assembly; In the output tail optical fiber of described doubly clad optical fiber, fibre core (11) is connected by welding with optical fiber end cap (21), described fibre core (11) and optical fiber end cap (21) all by glue package encapsulating in fixture (24), be provided with high refractive index material layer (23) in described optical fiber end cap (21), being used for absorption diffuses to the cladding light (16) in optical fiber end cap (21) and forms heat energy; Described encapsulation fixture (24) is connected with Water-cooling circulating assembly, carries out cooling operations by Water-cooling circulating assembly to optical fiber end cap (21).
2. the large-power optical fiber output system with cladding light filtering function according to claim 1, it is characterized in that, described Water-cooling circulating assembly comprises external jacket (31), water inlet (34), inner cycle channel (37), outer circulation passage (38) and water delivering orifice (35), described external jacket (31) is connected with encapsulation fixture (24), it is inner that described inner cycle channel (37) is positioned at encapsulation fixture (24), described outer circulation passage (38) is positioned between encapsulation fixture (24) and external jacket (31), be communicated with by limbers (25) between described inner cycle channel (37) and outer circulation passage (38).
3. the large-power optical fiber output system with cladding light filtering function according to claim 2, it is characterized in that, the chilled water of low temperature enters inner cycle channel (37) from described water inlet (34), to in high refractive index material layer (23) form heat energy and carry out water-cooled process, then enter outer circulation passage (38) by limbers (25), finally discharge from water delivering orifice (35).
4. the large-power optical fiber output system with cladding light filtering function according to claim 2, is characterized in that, described encapsulation fixture (24) is connected with tie point (33) by screw thread (32) with the external jacket (31) of Water-cooling circulating assembly.
5. the large-power optical fiber output system with cladding light filtering function according to claim 1 or 2 or 3 or 4, is characterized in that, described optical fiber end cap (21) is 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN105511088A true CN105511088A (en) | 2016-04-20 |
| CN105511088B CN105511088B (en) | 2018-01-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772787A (en) * | 2017-02-08 | 2017-05-31 | 中科先为激光科技（北京）有限公司 | For filtering the optical fiber of cladding light and applying 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 |
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| CN102902030A (en) * | 2011-07-29 | 2013-01-30 | 山西飞虹激光科技有限公司 | Energy transfer optical cable for high-power laser transmission |
| WO2013083275A1 (en) * | 2011-12-07 | 2013-06-13 | Jenoptik Laser Gmbh | Light guide comprising an optical fiber and a mode stripper |
| 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 |
| CN103676051A (en) * | 2013-11-29 | 2014-03-26 | 深圳市创鑫激光技术有限公司 | Myriawatt-level high-power optical fiber end cap |
| CN203519869U (en) * | 2013-10-09 | 2014-04-02 | 深圳朗光科技有限公司 | Fiber packaging structure |
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2016
- 2016-01-22 CN CN201610042386.1A patent/CN105511088B/en active Active
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| CN102902030A (en) * | 2011-07-29 | 2013-01-30 | 山西飞虹激光科技有限公司 | Energy transfer optical cable for high-power laser transmission |
| WO2013083275A1 (en) * | 2011-12-07 | 2013-06-13 | Jenoptik Laser Gmbh | Light guide comprising 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772787A (en) * | 2017-02-08 | 2017-05-31 | 中科先为激光科技（北京）有限公司 | For filtering the optical fiber of cladding light and applying its cladding light stripper |
| 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 |
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| CN105511088B (en) | 2018-01-30 |
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