CN103336333B - For the manufacture method of the pump optical fiber combiner of high power fiber laser - Google Patents
For the manufacture method of the pump optical fiber combiner of high power fiber laser Download PDFInfo
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- CN103336333B CN103336333B CN201310215596.2A CN201310215596A CN103336333B CN 103336333 B CN103336333 B CN 103336333B CN 201310215596 A CN201310215596 A CN 201310215596A CN 103336333 B CN103336333 B CN 103336333B
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Abstract
For the manufacture method of the pump optical fiber combiner of high power fiber laser, comprise the following steps: 1) choose quartz capillary; 2) quartz capillary is processed; 3) tubulature; 4) welding; 5) encapsulate.The present invention, eliminates fused biconical taper process, and optical fiber can not deform, and greatly reduces insertion loss, improves pumping efficiency.
Description
Technical field
The invention belongs to technical field of optical fiber, relate to a kind of manufacture method of the pump optical fiber combiner for high power fiber laser.
Background technology
In high power fiber laser, pump light bundling device, also known as power beam combiner, it is a Primary Component, the pump light that multiple semiconductor laser (LD) sends enters the inner cladding of active double clad fiber by bundling device, then progressively absorbed by fibre core, cause flashlight to be excited to amplify.
Traditional pump light bundling device, because of the difference of structure, has N × 1 type and two kinds, (N+1) × 1 type.Below for (the N+1) × 1 type pump combiner shown in Fig. 1, its manufacturing process and principle of work are introduced as follows: first, by fixture, N root pumping optical fiber is arranged in around a signal optical fibre closely, form fibre bundle; Then fibre bundle is placed in oxyhydrogen flame, reverses an edge axis to two side stretchings, finally form bicone structure in heating zone; Afterwards, two cones are obtained from centre incision; Finally cone and doubly clad optical fiber be welded together and encapsulate, obtaining two (N+1) × 1 type power beam combiner.Pump light is transferred through the inner cladding that La Zhui district is coupled into signal optical fibre in the fibre core of pumping optical fiber, and the flashlight of signal optical fibre is coupled to the fibre core of doubly clad optical fiber again.
This bundling device is a kind of end pumping device in essence, there is following shortcoming: 1, in fused biconical taper process, and pumping optical fiber and signal optical fibre, because being subject to the effect of twisting resistance, deformation occurs, and flashlight loss is comparatively large, and usual insertion loss is 0.5dB; In multikilowatt laser instrument, this is equivalent to the power attenuation of 100W, causes bundling device temperature rise higher, has a strong impact on beam quality, even damages optical fiber and device.2, due to pumping optical fiber and signal optical fibre twisted together, there is no the waveguide of pump light, so the absorptivity of pump light is lower, only have about 90%.3, because be end-pumping bundling device, so the flashlight reflected by optical fiber laser output end is easy to enter pump diode, thus to causing semiconductor diode to damage.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of manufacture method of the pump optical fiber combiner for high power fiber laser, pump light incident and transfer to conical position from quartzy tube wall, covering and the fibre core of doubly clad optical fiber is entered by total internal reflection, greatly can reduce the insertion loss of pump combiner, pumping efficiency can reach more than 95%.In addition; the bundling device of the method manufacture is profile pump; the flashlight reflected by optical fiber laser output end is difficult to enter pump diode by the bundling device of profile pump, reflected signal light is limited in inner cladding waveguide, thus protects pump diode.
In order to reach foregoing invention object, the technical solution used in the present invention is: for the manufacture method of the pump optical fiber combiner of high power fiber laser, comprise the following steps: 1) choose quartz capillary; 2) quartz capillary is processed; 3) tubulature; 4) welding; 5) encapsulate; It is characterized in that:
1), quartz capillary is chosen: choose one section of its internal diameter of quartz capillary and equal the inner cladding external diameter of doubly clad optical fiber (as 25/250 optical fiber, bore is 250 μm; As 20/400 optical fiber, bore is 400 μm), the external diameter of kapillary depends on required pumping optical fiber quantity;
2), processing quartz capillary: be coniform by one end of above-mentioned quartz capillary, control coning angle is 2 θ, and the other end is plane;
Described step 2) in, coniform quartz capillary adopts grinding and polishing method, hydrofluorite etch or draws cone method processing acquisition to be coniform by one end of quartz capillary.
Described grinding and polishing method: be that to become one end with vertical direction or the grinding and polishing of horizontal direction quartz capillary be coniform; Described hydrofluorite etch: be that cylindric quartz capillary is vertically put into hydrofluorite (HF) solution, slow lifting, making quartz capillary outside surface be etched into taper shape, in order to prevent capillary tube inner wall Bei Fu Tong, needing antiseptic on Bi Tu Nei Mao Xi Guan in advance; Described draws cone method: being first insert in quartz capillary with stainless steel wire, then drawing cone machine pull-up to bore, making outside surface coning; because of the protective effect of the stainless steel wire of insertion; capillary inner diameter can not change, and then from the most carefully cutting, obtains two conical kapillaries.
3), tubulature: in the metal that many pumping optical fibers are loaded a porous or ceramic pipes, with step 2) in the flush end welding of quartz capillary, then remove metal or ceramic pipe;
4), welding: center pit doubly clad optical fiber being penetrated the good quartz capillary of firm welding, and with heat sealing machine heated quartz kapillary, make quartz capillary inwall molten with doubly clad optical fiber inner cladding outer wall together with;
In described step (4), heat sealing machine adopts heat sealing machine with ring fire by the flush end welding of many pumping optical fibers and quartz capillary.
5), encapsulation after, the pump optical fiber combiner for high power fiber laser can be obtained.
The present invention compared with prior art has following advantages: 1, signal light path is without any distortion and strain, so signal insertion loss is minimum, is less than 0.01dB.2, peripheral solid position is directed causes conical position at quartz capillary for pump light.Entered covering and the fibre core of doubly clad optical fiber by total internal reflection, therefore pumping efficiency is high, can be greater than 95%.3, because be profile pump, therefore any position of fiber laser light path can be placed on and distributed pumping can be realized.4, antireflection ability increases Strong; what adopt manufacture of the present invention is profile pump bundling device; the flashlight reflected by optical fiber laser output end is difficult to enter pump diode by the bundling device of profile pump; this is because inner cladding has high index; and the quartz capillary of periphery has lower refractive index; reflected signal light is limited in inner cladding waveguide, thus protects pump diode.
Accompanying drawing explanation
Fig. 1 is known optical-fiber bundling device schematic diagram of fabrication technology;
Fig. 2 is bundling device structural representation of the present invention;
Fig. 3 is the vertical polishing schematic diagram of capillary quartz ampoule;
Fig. 4 is fibre bundle and quartz capillary welding schematic diagram;
Fig. 5 is that doubly clad optical fiber penetrates quartz capillary schematic diagram;
Fig. 6 is the horizontal polishing schematic diagram of capillary quartz ampoule;
Fig. 7 is hydrofluorite etch processing capillary quartz ampoule schematic diagram;
Fig. 8 draws cone method to process capillary quartz ampoule schematic diagram;
In figure: the capillary quartz ampoule after 201 polishings, more than 202 pumping optical fiber, 203 doubly clad optical fibers, 204 ceramic fixtures, 301 capillary quartz ampoules.
Embodiment
Being known by Fig. 1, is known (N+1) × 1 type pump combiner, by its manufacturing process and principle of work: first, by fixture, N root pumping optical fiber is arranged in a around a signal optical fibre closely, forms fibre bundle; Then fibre bundle is placed in oxyhydrogen flame, reverses an edge axis to two side stretchings, finally form bicone structure b in heating zone; Afterwards, two cone c are obtained from centre incision; Finally cone and doubly clad optical fiber be welded together and encapsulate, obtaining two (N+1) × 1 type power beam combiner.
Being known by Fig. 2, is bundling device structural representation of the present invention; Pump light is incident and transfer to conical position from quartzy tube wall; covering and the fibre core of doubly clad optical fiber is entered by total internal reflection; this bundling device is profile pump; the flashlight reflected by optical fiber laser output end is difficult to enter pump diode by the bundling device of profile pump; and the kapillary of periphery has lower refractive index; reflected signal light is made to be limited in, in inner cladding waveguide, protecting pump diode.
Embodiment 1:
Known by Fig. 3, for the manufacture method of the pump optical fiber combiner of high power fiber laser, comprise the following steps: 1, known by Fig. 3 a, choose one section of quartz capillary 301, its internal diameter φ
1just in time equal the inner cladding external diameter of doubly clad optical fiber, the external diameter φ of quartz capillary
2depend on that (as 25/250 optical fiber, bore is 250 μm to required pumping optical fiber quantity; As 20/400 optical fiber, bore is 400 μm).
2, adopt vertical polishing processes to process quartz capillary, see Fig. 3 b.Use circular cone buffing machine, one end of polishing quartz capillary, controlling coning angle is 2 θ, and obtain the quartz capillary 201 shown in Fig. 3 b, one end is coniform, and one end is plane.
3, in the metal many pumping optical fibers 202 being penetrated a porous or ceramic fixture 204, see Fig. 4 a, with the heat sealing machine with ring fire by good for the flush end welding of the quartz ampoule 201 prepared in itself and step 2, then remove metal or ceramic pipe 204, see Fig. 4 b.
4, doubly clad optical fiber 203 is penetrated the center pit of the good quartz capillary of firm welding, see Fig. 5.With heat sealing machine heated quartz kapillary, make capillary tube inner wall and doubly clad optical fiber inner cladding outer wall molten together with.
5, after encapsulation, the pump optical fiber combiner for high power fiber laser can be obtained.
Embodiment 2:
Known by Fig. 6, for the manufacture method of the pump optical fiber combiner of high power fiber laser, the horizontal rubbing down of employing throws method processing quartz capillary makes its one end be coniform, and all the other steps are with embodiment 1.
Embodiment 3:
Known by Fig. 7, for the manufacture method of the pump optical fiber combiner of high power fiber laser, adopt hydrofluorite etch that cylindric quartz capillary is vertically put into hydrofluorite (HF) solution, slow lifting, quartz capillary outside surface is made to be etched into taper shape, after processing, one end of quartz capillary be coniform, and in order to prevent capillary tube inner wall Bei Fu Tong, need are antiseptic on Bi Tu Nei Mao Xi Guan in advance; All the other steps are with embodiment 1.
Embodiment 4:
Known by Fig. 8, for the manufacture method of the pump optical fiber combiner of high power fiber laser, adopt and draw cone method to process quartz capillary, first insert in kapillary with stainless steel wire, see Fig. 8 a, protect its internal diameter to change, then drawing cone machine pull-up to bore, making outside surface coning, seeing Fig. 8 a; Then from the most carefully cutting, obtaining two conical kapillaries, seeing Fig. 8 b.Controlling coning angle is 2 θ, and obtain the quartz capillary 201 shown in Fig. 3 b, one end is coniform, and one end is cylindric.All the other steps are with embodiment 1.
Claims (5)
1. for the manufacture method of the pump optical fiber combiner of high power fiber laser, comprise the following steps: 1) choose quartz capillary; 2) quartz capillary is processed; 3) tubulature; 4) welding; 5) encapsulate; It is characterized in that:
1), quartz capillary is chosen: choose the inner cladding external diameter that one section of its internal diameter of quartz capillary equals doubly clad optical fiber: 25/250 optical fiber, bore are 250 μm or 20/400 optical fiber, bore is 400 μm, and the external diameter of kapillary depends on required pumping optical fiber quantity;
2), processing quartz capillary: be coniform by one end of above-mentioned quartz capillary, control coning angle is 2 θ, and the other end is plane;
3), tubulature: in the metal that many pumping optical fibers are loaded a porous or ceramic pipes, with step 2) in the flush end welding of ready quartz capillary, then remove metal or ceramic pipe;
4), welding: center pit doubly clad optical fiber being penetrated the good quartz capillary of firm welding, and with heat sealing machine heated quartz kapillary, make quartz capillary inwall molten with doubly clad optical fiber inner cladding outer wall together with;
5), encapsulation after, the pump optical fiber combiner for high power fiber laser can be obtained.
2. the manufacture method of the pump optical fiber combiner for high power fiber laser according to claim 1, it is characterized in that: described step 2) in, coniform quartz capillary adopts grinding and polishing method, hydrofluorite etch or draws cone method processing acquisition to be coniform by one end of quartz capillary.
3. the manufacture method of the pump optical fiber combiner for high power fiber laser according to claim 2, it is characterized in that: described hydrofluorite etch is that cylindric quartz capillary is vertically put into HF solution, slow lifting, quartz capillary outside surface is made to be etched into taper shape, in order to prevent capillary tube inner wall to be corroded, need to coat antiseptic at capillary tube inner wall in advance.
4. the manufacture method of the pump optical fiber combiner for high power fiber laser according to claim 2, it is characterized in that: described cone method of drawing first inserts in quartz capillary with stainless steel wire, then cone machine pull-up is being drawn to bore, make outside surface coning, capillary inner diameter can not change, then from the most carefully cutting, two conical kapillaries are obtained.
5. the manufacture method of the pump optical fiber combiner for high power fiber laser according to claim 1, it is characterized in that: in described step 4), heat sealing machine adopts heat sealing machine with ring fire by the flush end welding of many pumping optical fibers and quartz capillary.
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| CN105891951A (en) * | 2014-09-30 | 2016-08-24 | 中国兵器装备研究院 | Modularized manufacturing method of multi-core beam combiner |
| CN105712621B (en) * | 2016-01-18 | 2018-10-02 | 中国科学院上海光学精密机械研究所 | The preparation method of quartz glass covering multicomponent glass composite fiber |
| CN106997074A (en) * | 2016-01-22 | 2017-08-01 | 深圳朗光科技有限公司 | A kind of high-power optical-fiber bundling device and laser |
| CN105938221B (en) * | 2016-06-20 | 2019-06-21 | 大族激光科技产业集团股份有限公司 | Optical fiber welding point coats packaging tool and optical fiber welding point coats packaging method |
| CN106772803B (en) * | 2016-12-28 | 2019-11-08 | 台州瑜瑞科技有限公司 | Multimode fibre beam splitter and preparation method thereof |
| CN107132619A (en) * | 2017-06-23 | 2017-09-05 | 深圳市阿集比光电科技有限公司 | Laser closes beam system and the compound conjunction beam system of laser |
| CN108761809A (en) * | 2018-03-28 | 2018-11-06 | 中国科学院上海光学精密机械研究所 | Multifiber beam penetrates the device of quartz capillary and penetrates method |
| CN109188610A (en) * | 2018-10-19 | 2019-01-11 | 北京工业大学 | A kind of optical-fiber bundling device with encapsulating structure |
| CN110749957A (en) * | 2019-09-25 | 2020-02-04 | 深圳联品激光技术有限公司 | Input optical fiber and manufacturing method thereof, optical fiber combiner and manufacturing method thereof |
| CN111061011A (en) * | 2019-11-20 | 2020-04-24 | 桂林电子科技大学 | Improved single-mode fiber and multi-core fiber coupler and preparation method thereof |
| CN111025477A (en) * | 2019-11-20 | 2020-04-17 | 桂林电子科技大学 | Single-mode fiber and capillary fiber coupler and preparation method thereof |
| CN112363277A (en) * | 2021-01-13 | 2021-02-12 | 深圳市星汉激光科技股份有限公司 | Optical fiber beam combining structure and manufacturing method thereof |
| CN114280803B (en) * | 2021-11-04 | 2023-12-29 | 光惠（上海）激光科技有限公司 | Manufacturing method of optical fiber laser beam combiner |
| CN114265149A (en) * | 2021-12-22 | 2022-04-01 | 长飞（武汉）光系统股份有限公司 | Method for manufacturing beam combiner |
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| JP2008277582A (en) * | 2007-04-27 | 2008-11-13 | Fujikura Ltd | Multicore fiber for optical pumping device, manufacturing method therefor, optical pumping device, fiber laser, and fiber amplifier |
| US8472765B2 (en) * | 2009-04-14 | 2013-06-25 | Ofs Fitel, Llc | Fiber based laser combiners |
| CN102237631A (en) * | 2010-04-22 | 2011-11-09 | 中国科学院西安光学精密机械研究所 | Single-mode pumping beam combiner |
| CN102841408A (en) * | 2011-06-23 | 2012-12-26 | 中国科学院西安光学精密机械研究所 | Production technology of optical fiber combiner based on capillary tube |
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Effective date of registration: 20210317 Address after: No.7-20, Zhongshan Road, Danyang City, Zhenjiang City, Jiangsu Province, 212300 Patentee after: DANYANG JUCHEN PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Address before: 212300 No.8, high tech industrial concentration zone, Danyang City, Zhenjiang City, Jiangsu Province Patentee before: JIANGSU SKYERALASER TECHNOLOGY Co.,Ltd. Patentee before: DANYANG JUCHEN PHOTOELECTRIC TECHNOLOGY Co.,Ltd. |
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