CN105759358A - All-fiber high-brightness single-mode fiber beam combiner and making method - Google Patents
All-fiber high-brightness single-mode fiber beam combiner and making method Download PDFInfo
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- CN105759358A CN105759358A CN201610042379.1A CN201610042379A CN105759358A CN 105759358 A CN105759358 A CN 105759358A CN 201610042379 A CN201610042379 A CN 201610042379A CN 105759358 A CN105759358 A CN 105759358A
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- 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
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
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Abstract
The invention discloses an all-fiber high-brightness single-mode fiber beam combiner and a making method. The fiber beam combiner comprises a glass casing beam combination structure, a multi-core structure and a multi-mode fiber formed sequentially, wherein the glass casing beam combination structure comprises an original single-mode fiber, a glass casing with the same refractive index as a cladding and a glass casing with a low refractive index; the glass casing with the same refractive index as the cladding is located at the outer side of the original single-mode fiber, and the glass casing with the low refractive index is located at the outer side of the glass casing with the same refractive index as the cladding; the multi-core structure comprises a multi-core fiber and an outer cladding structure located at the outer side of the multi-core fiber; and the multi-mode fiber comprises a fiber core and a cladding located at the outer side of the fiber core. The method of the invention is used for making the above fiber beam combiner. Thus, the duty cycle of the fiber beam combiner can be effectively improved, and a high output laser beam quality can be obtained.
Description
Technical field
Present invention relates generally to optical fiber laser field, refer in particular to a kind of all-fiber high brightness single-mode fiber bundling device drawing cone method based on light sleeve pipe.
Background technology
Optical fiber laser has the advantages such as conversion efficiency height, good beam quality, compact conformation, easy heat radiation, good operating stability, has been widely used for industry and national defence.But, by the restriction of the mechanism such as fiber nonlinear effect and optical thermal damage, the output of simple optical fiber laser instrument can not infinitely promote.In order to obtain the output of bigger optical-fiber laser, carrying out closing bundle to the optical-fiber laser of multiple mid power is a kind of effective means, and wherein required Primary Component is exactly optical-fiber bundling device.Compared to the light beam synthetic schemes of space structure, the optical-fiber bundling device of all optical fibre structure have simple and compact for structure, use the advantages such as flexible, it is possible to avoiding space optical path to regulate, the lifting of its power is limited solely by optical-fiber bundling device itself.Application optical-fiber bundling device closes bundle and has become as effective selection scheme of large-power optical fiber laser output, but ordinary optic fibre bundling device cannot realize significantly high dutycycle due to optical fiber beam combination, and beam quality can be caused to degenerate thus reducing laser brightness.
The optical-fiber bundling device of all optical fibre structure is the optical fibre device of preparation on the basis of fused biconical taper fibre bundle (TaperFusedFiberBundle, TFB).It is that one section of optical fiber is peelled off coat, then arranged together in a certain way, and in high temperature, heating is so as to melt, simultaneously stretching optical fiber bundle round about, and optical fiber heating region is melted into melting cone fiber bundle.After cone waist cuts off, district's outfan and an output optical fibre welding will be bored, and then obtain the laser after closing bundle at outfan.
Specifically, tradition bundling device mainly includes the parts such as optical fiber beam combination, fused biconical taper, fusion point and output optical fibre.First many single-mode fibers are carried out beam combination, cross section obtains intended structure.Then pass through the close fiber optic after fused biconical taper makes beam combination to be fused together, the circular configuration of formation rule.Finally, fibre bundle is cut in molten homogeneous La Zhui district, carries out welding with output optical fibre.In actual demand, also total is packaged, complete the making of optical-fiber bundling device.
Traditional optical-fiber bundling device is all multimode fibre output, and this is to be determined by the dutycycle that optical fiber beam combination is relatively low, and the dutycycle of optical fiber beam combination is to be determined by the covering fibre core of original fiber ratio.Adopt multimode fibre as output optical fibre, it is simply that to utilize the feature that output optical fibre pattern is many, mode field diameter is big, realize the light field with optical fiber beam combination and mate.Although this bundling device can realize very low loss, but owing to being multimode fibre output, laser brightness sharply declines.
In order to improve the optical-fiber bundling device dutycycle when beam combination, a kind of conventional method is to utilize chemistry acid corrosion method covering to carry out corrosion to reduce cladding size, and then reduces the distance of core diameter during beam combination, increases the dutycycle of bundling device.But there are two defects in this method: one is the optical fiber quality variation that chemistry acid corrosion is later, is not easy to later stage process；Two be fibre core light field distribution character determine cladding size cannot unrestrictedly reduce.How to increase the dutycycle of optical-fiber bundling device original fiber covering not being corroded, and then realize high brightness while obtaining high power laser output, expand its range of application further, be key issue urgently to be resolved hurrily.
Summary of the invention
The technical problem to be solved in the present invention is that the present invention provides a kind of can be effectively improved the dutycycle of optical-fiber bundling device, all-fiber high brightness single-mode fiber bundling device obtaining higher quality for outputting laser beam and manufacture method for the technical problem that prior art exists.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of all-fiber high brightness single-mode fiber bundling device, including the glass bushing beam combination structure, multicore structure and the multimode fibre that sequentially form, described glass bushing beam combination structure include original single-mode fiber, etc. cladding index glass bushing and light sleeve pipe, the cladding index glass bushing such as described is positioned at the outside of original single-mode fiber, and described light sleeve pipe such as is then positioned at the outside of cladding index glass bushing；Described multicore structure includes multi-core fiber and is positioned at the surrounding layer structure outside multi-core fiber, and described multimode fibre includes fibre core and is positioned at the covering outside fibre core.
The present invention further provides a kind of method for making above-mentioned optical-fiber bundling device, the steps include:
S1: utilize the glass bushing equal with cladding index that original single-mode fiber is carried out beam combination and collapse, what obtain circular covering uniformly bores district；
S2: utilize light sleeve pipe that the uniformly cone district obtained in step S1 is carried out secondary beam combination and collapse, obtain the multi-core fiber structure of cross section rule；
S3: the multi-core fiber structure that step S2 is obtained carries out thermal insulation and draws cone, cuts as bundling device output optical fibre in uniformly cone district.
Further improvement as the inventive method: when carrying out fused biconical taper, glass bushing beam combination structure is fixed on stretching mobile platform, utilize duration and degree of heating to advance and regulate and fix position, by controlling the first optical fiber mobile platform and the translational speed of the second optical fiber mobile platform, it is achieved reservation shape draw cone.
Compared with prior art, it is an advantage of the current invention that:
1, a kind of all-fiber high brightness single-mode fiber bundling device of the present invention and manufacture method, be effectively increased the dutycycle of optical-fiber bundling device, obtain higher quality for outputting laser beam；Avoid the corrosion treatmentCorrosion Science to original fiber covering, add the intensity of bundling device.
2, a kind of all-fiber high brightness single-mode fiber bundling device of the present invention and manufacture method, whole bundling device does not have fusion point, it is to avoid fusing operation；
3, a kind of all-fiber high brightness single-mode fiber bundling device of the present invention and manufacture method, whole to draw cone region be all that cone is drawn in thermal insulation, and energy dissipation is less, reduces the difficulty of radiating treatment.
Accompanying drawing explanation
Fig. 1 is the population structure schematic diagram of the present invention.
Fig. 2 is glass sock tube method fibre bundle fused biconical taper schematic diagram of the present invention.
Fig. 3 is that two-step method of the present invention eliminates covering Flos Mume valve structure schematic flow sheet.
Fig. 4 is the fibre bundle cross sectional representation before and after glass bushing airport is collapsed.
Fig. 5 is the eigen mode schematic diagram that bundling device is corresponding when difference draws cone ratio.
Fig. 6 is the bundling device light field evolution schematic diagram when low step mode incidence.
When Fig. 7 is low step mode incidence, bundling device draws the beam quality factor at cone ratio place in difference.
Marginal data:
1, glass bushing beam combination structure；2, multicore structure；3, multimode fibre；11, original single-mode fiber；12, the cladding index glass bushing such as；13, light sleeve pipe；21, multi-core fiber；22, surrounding layer structure；31, fibre core；32, covering.4, mobile platform is stretched；41, the first optical fiber mobile platform；42, the second optical fiber mobile platform；5, duration and degree of heating.
Detailed description of the invention
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
As shown in Figure 1, the all-fiber high brightness single-mode fiber bundling device of the present invention, for drawing all-fiber high brightness single-mode fiber bundling device of cone method based on light sleeve pipe, it includes the glass bushing beam combination structure 1, multicore structure 2 and the multimode fibre 3 that sequentially form, wherein glass bushing beam combination structure 1 include original single-mode fiber 11, etc. cladding index glass bushing 12 and light sleeve pipe 13, be positioned at the outside of original single-mode fiber 11 etc. cladding index glass bushing 12, light sleeve pipe 13 such as is then positioned at the outside of cladding index glass bushing 12；Multicore structure 2 includes multi-core fiber 21 and is positioned at the surrounding layer structure 22 outside multi-core fiber 21, and multimode fibre 3 includes fibre core 31 and is positioned at the covering 32 outside fibre core 31.
The present invention draws cone by fused biconical taper fibre bundle is carried out thermal insulation so that keeping low step mode in the whole process of optical-fiber bundling device, along with drawing cone degree to increase, the distance between fibre core 31 is gradually reduced, and bundling device dutycycle improves, and multicore super model excites.When fibre core 31 size reduces further, multicore super model ends and excites low order cladding mode, thus realizing the optical-fiber bundling device output of high brightness.
For this, the present invention further provides the manufacture method of a kind of above-mentioned optical-fiber bundling device, concretely comprise the following steps:
S1: utilize the glass bushing equal with covering 32 refractive index that original single-mode fiber is carried out beam combination and collapse, what obtain circular covering uniformly bores district.
S2: utilize light sleeve pipe 13 that the uniformly cone district obtained in step S1 is carried out secondary beam combination and collapse, obtain multi-core fiber 21 structure of cross section rule.
S3: multi-core fiber 21 structure that step S2 is obtained carries out thermal insulation and draws cone, cuts as bundling device output optical fibre in uniformly cone district.
As in figure 2 it is shown, be the glass sock tube method fibre bundle fused biconical taper schematic diagram of the present invention.Glass bushing beam combination structure 1 is fixed on stretching mobile platform 4 on, duration and degree of heating 5 advances and regulates and fixes position, by controlling the translational speed of the first optical fiber mobile platform 41 and the second optical fiber mobile platform 42, it is achieved reservation shape draw cone.
As it is shown on figure 3, be that the present invention adopts two-step method to eliminate the schematic flow sheet of covering Flos Mume valve structure in concrete application example.The first step with etc. cladding index glass bushing 12 original single-mode fiber carried out beam combination, obtained the circular configuration of rule by the fused biconical taper method shown in Fig. 2；Second step plus light sleeve pipe 13, obtains predetermined multimode fibre 3 by the fused biconical taper method shown in Fig. 2 on the basis of the first step.
As shown in Figure 4, for present invention glass bushing airport in concrete application example collapse before and after fibre bundle cross sectional representation.Wherein Fig. 4 (a) collapse for glass bushing airport before optical fiber beam combination cross sectional representation；Fig. 4 (b) collapse for glass bushing airport after multi-core fiber feature cross-section schematic diagram.Wherein, original single-mode fiber cladding radius is r, and glass bushing thickness is d, and the multi-core fiber structure cladding radius obtained is R.
As it is shown in figure 5, be the eigen mode schematic diagram that bundling device of the present invention is corresponding when difference draws cone ratio.Wherein Fig. 5 (a) is LP01 mould；The LP11 mould of Fig. 5 (b) and Fig. 6 respectively two kinds of forms.Cone ratio is wherein drawn to be defined as: TR=Rt/ R(RtFor the cladding radius of corresponding position, R is airport cladding diameter when collapsing completely but do not carry out drawing cone).
As shown in Figure 6, for the bundling device of the present invention light field evolution schematic diagram when low step mode incidence.The wherein first behavior LP01 mould of Fig. 6；The LP11 mould of second row of Fig. 6 and the third line of Fig. 6 respectively two kinds of forms.
As it is shown in fig. 7, be in concrete application example, when low step mode incidence, bundling device draws the M at cone ratio place in difference2The factor.
Below being only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment, and 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 those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be regarded as protection scope of the present invention.
Claims (3)
1. an all-fiber high brightness single-mode fiber bundling device, it is characterized in that, including glass bushing beam combination structure (1) sequentially formed, multicore structure (2) and multimode fibre (3), described glass bushing beam combination structure (1) include original single-mode fiber (11), etc. cladding index glass bushing (12) and light sleeve pipe (13), the cladding index glass bushing (12) such as described is positioned at the outside of original single-mode fiber (11), and described light sleeve pipe (13) such as is then positioned at the outside of cladding index glass bushing (12)；Described multicore structure (2) includes multi-core fiber (21) and is positioned at the surrounding layer structure (22) in multi-core fiber (21) outside, and described multimode fibre (3) includes fibre core (31) and is positioned at the covering (32) in fibre core (31) outside.
2. the method being used for making above-mentioned optical-fiber bundling device, it is characterised in that step is:
S1: utilize the glass bushing equal with covering (32) refractive index that original single-mode fiber is carried out beam combination and collapse, what obtain circular covering uniformly bores district；
S2: utilize light sleeve pipe (13) that the uniformly cone district obtained in step S1 is carried out secondary beam combination and collapse, obtain multi-core fiber (21) structure of cross section rule；
S3: multi-core fiber (21) structure that step S2 is obtained carries out thermal insulation and draws cone, cuts as bundling device output optical fibre in uniformly cone district.
3. the method being used for making above-mentioned optical-fiber bundling device according to claim 2, it is characterized in that, when carrying out fused biconical taper, glass bushing beam combination structure (1) is fixed in stretching mobile platform (4), utilize duration and degree of heating (5) to advance and regulate and fix position, by controlling the first optical fiber mobile platform (41) and the translational speed of the second optical fiber mobile platform (42), it is achieved reservation shape draw cone.
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| CN201610042379.1A CN105759358B (en) | 2016-01-22 | 2016-01-22 | A kind of all -fiber high brightness single mode optical fiber bundling device and production method |
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| CN201610042379.1A CN105759358B (en) | 2016-01-22 | 2016-01-22 | A kind of all -fiber high brightness single mode optical fiber bundling device and production method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111045153A (en) * | 2019-11-20 | 2020-04-21 | 桂林电子科技大学 | Low-loss single-mode fiber and annular core fiber coupler and preparation 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 |
| CN111093468A (en) * | 2017-07-17 | 2020-05-01 | Z思快尔有限公司 | Enhanced imaging through multicore fiber optic endoscope |
| CN111552034A (en) * | 2020-04-10 | 2020-08-18 | 桂林电子科技大学 | Multi-core optical fiber MXN type multi-path beam splitter |
| CN112290371A (en) * | 2021-01-04 | 2021-01-29 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining system based on square optical fiber beam combiner |
| CN113149422A (en) * | 2021-01-14 | 2021-07-23 | 艾菲博(宁波)光电科技有限责任公司 | Method and device for preparing high-duty-ratio multi-core microstructure communication optical fiber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111093468A (en) * | 2017-07-17 | 2020-05-01 | Z思快尔有限公司 | Enhanced imaging through multicore fiber optic endoscope |
| CN111045153A (en) * | 2019-11-20 | 2020-04-21 | 桂林电子科技大学 | Low-loss single-mode fiber and annular core fiber coupler and preparation method thereof |
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| CN111552034A (en) * | 2020-04-10 | 2020-08-18 | 桂林电子科技大学 | Multi-core optical fiber MXN type multi-path beam splitter |
| CN112290371A (en) * | 2021-01-04 | 2021-01-29 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining system based on square optical fiber beam combiner |
| CN112290371B (en) * | 2021-01-04 | 2021-03-19 | 中国工程物理研究院激光聚变研究中心 | Laser beam combining system based on square optical fiber beam combiner |
| CN113149422A (en) * | 2021-01-14 | 2021-07-23 | 艾菲博(宁波)光电科技有限责任公司 | Method and device for preparing high-duty-ratio multi-core microstructure communication optical fiber |
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