CN105572802A - Fiber welding point processing method - Google Patents
Fiber welding point processing method Download PDFInfo
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- CN105572802A CN105572802A CN201610121255.2A CN201610121255A CN105572802A CN 105572802 A CN105572802 A CN 105572802A CN 201610121255 A CN201610121255 A CN 201610121255A CN 105572802 A CN105572802 A CN 105572802A
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- optical fiber
- light transmission
- protective layer
- transmission protective
- light
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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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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention relates to a fiber welding point processing method. According to the method, a first light transmission protection layer and a second light transmission protection layer having different refractive indexes are made at a welding point and a nearby position of the welding point, a fiber with the two light transmission protection layers is placed in a packaging structure of a water cooling device, light irradiates, if the fiber work temperature is greater than 60 DEG C, the water cooling device is utilized for cooling the fiber. The method is suitable for double-cladding fibers and single-cladding fibers, through setting the light transmission protection layers having the different refractive indexes, light leaked at the welding point can be led to the light transmission protection layers to protect the welding point, the welding point can be prevented from being heated by leaked light through multi-time scattering, welding damage can be effectively prevented, and the light tolerance power level of the welding point can be improved.
Description
Technical field
The present invention relates to a kind of optical fiber fusion welding point disposal route, belong to photoelectron technical field.
Background technology
Fiber laser has compact conformation, perfect heat-dissipating, conversion efficiency is high, beam quality is excellent and steady performance has a wide range of applications demand in a lot of fields.So far, large scheme is placed by laser generation level, realize single fiber and export the multikilowatt full-optical-fiber laser with good beam quality, be widely used in each industrial processes industry such as automobile making, shipping industry, railway locomotive manufacture, military processing, metal material processing, and constantly expand to more wide application.
In the development process of fiber laser, fused fiber splice and fusion point treatment technology have material impact to fiber laser output power and conversion efficiency.High-capacity optical fiber laser welding comprises single covering multimode optical fiber welding between high power pump source and bundling device, and based on the welding between each optical fibre device and doubly clad optical fiber of doubly clad optical fiber.Document " Thermaleffectsinhighpowercwfiberlasers " (2008SPIEVol.7195pp7195U-1) points out that the scattered light of the fusion point of welding quality difference can cause recoat to cover and generate heat between the original coat of optical fiber, improves welding quality and can reduce this heating.But too high welding quality is difficult to reach on the one hand, welding mortality can be made to increase on the other hand, and for some welding occasion as different fibre core welding, even if welding quality is high more all cannot avoid the optical fiber leakage of fusion point place, thus cause fusion point to generate heat, reduce the resistance to optical power levels of fusion point.(2013 Chinese laser Vol.40pp0702001-1) analyzes optical fiber align to document " the nearly single mode full-optical-fiber laser of 1.5kW " affects double-cladding doped fiber and the welding of double clad passive fiber, the fusion point pointing out between double clad passive fiber and doped fiber is the maximum point of whole fiber laser thermal value, and optical fiber even can be caused to damage near fusion point place and fusion point.
Therefore, in order to ensure fiber laser output power and light light conversion efficiency, needing to study a kind of optical fiber fusion welding point disposal route, generating heat to reduce fusion point (recoat covers between the original coat of optical fiber), avoid optical fiber welding to cause damage, improve the resistance to optical power levels of fusion point.
Summary of the invention
The technical matters that the present invention solves is: overcome the deficiencies in the prior art, provide a kind of optical fiber fusion welding point disposal route, can effectively avoid fusion point to generate heat, and improves the resistance to optical power levels of fusion point.
Technical solution of the present invention is: a kind of optical fiber fusion welding point disposal route, and described optical fiber is doubly clad optical fiber, comprises the following steps:
Step one: remove the coat around two optical fiber fusion welding points and surrounding layer, makes the optical fiber inner cladding near fusion point and fusion point exposed, two optical fiber is carried out welding;
Step 2: the exposed inner cladding outside near fusion point and fusion point makes the first light transmission protective layer and the second light transmission protective layer successively, the wherein refractive index n of the first light transmission protective layer
1the refractive index n of < second light transmission protective layer
2, and n
1the refractive index n of < inner cladding
0;
Step 3: the optical fiber with two-layer light transmission protective layer after step 2 process is placed in the encapsulating structure with water cooling plant; logical light; judge whether described fiber work temperature is greater than 60 degree; if be not more than; then optical fiber fusion welding point process completes; otherwise utilize described water cooling plant to lower the temperature for optical fiber, optical fiber fusion welding point process completes.
A kind of optical fiber fusion welding point disposal route, described optical fiber is single cladded-fiber, comprises the following steps:
Step one: remove the coat around two optical fiber fusion welding points, make the fibre cladding near fusion point and fusion point exposed, two optical fiber are carried out welding;
Step 2: the exposed covering outside near fusion point and fusion point makes the first light transmission protective layer and the second light transmission protective layer successively, the wherein refractive index n of covering
3the refractive index n of < first light transmission protective layer
1the refractive index n of <=second light transmission protective layer
2.
Step 3: the optical fiber with two-layer light transmission protective layer after step 2 process is placed in the encapsulating structure with water cooling plant; logical light; judge whether described fiber work temperature is greater than 60 degree; if be not more than; then optical fiber fusion welding point process completes; otherwise utilize described water cooling plant to lower the temperature for optical fiber, optical fiber fusion welding point process completes.
Described first light transmission protective layer is attached most importance to coat or optical gel or light-transmitting wave guide structure; second light transmission protective layer is optical gel or light-transmitting wave guide structure, all fits tightly without air between two-layer light transmission protective layer, between the first light transmission protective layer and optical fiber.
In described step 3, encapsulating structure is the shape metallic leak-proof structure with cavity, and described cavity is for placing optical fiber; Water cooling plant comprises water inlet pipe and rising pipe, water inlet pipe and rising pipe and described cavity connects, reduces fiber work temperature by circulating of water.
Described two optical fiber are optical fiber of the same type or dissimilar optical fiber.
The present invention's advantage is compared with prior art:
(1) the present invention proposes fusion point disposal route for doubly clad optical fiber and single cladded-fiber respectively; by arranging two-layer light transmission protective layer; fusion point is protected; and further by two-layer light transmission protective layer refractive index design; fusion point can be revealed light to import in light transmission protective layer, prevent revealing light Multiple Scattering and cause fusion point to generate heat, under general welding quality; can effectively avoid welding to damage, improve the resistance to optical power levels of fusion point.
(2) the present invention first light transmission protective layer is attached most importance to coat or optical gel or light-transmitting wave guide structure; second light transmission protective layer is optical gel or light-transmitting wave guide structure; the index of refraction relationship of the first light transmission protective layer and the second light transmission protective layer is utilized to design; regulate the first light transmission protective layer interface optical transport behavior; to the light-output in ground floor light transmission protective layer be constrained in, can prevent light forward direction or reverse transfers in the first light transmission protective layer from causing optical fiber fusion welding point to damage.All fit tightly without air between two-layer light transmission protective layer, between the first light transmission protective layer and optical fiber, avoid because air enters generation light scattering, improve the resistance to optical power levels of fusion point.
(3) the present invention adopts the encapsulating structure with water cooling plant to cool for fusion point when fusion point temperature exceeds 60 degree, water cooling plant is made up of two water pipes, structure is simple, reliable operation, effectively can be flowed by the circulation of water and reduce optical fiber fusion welding point temperature, effectively improve the resistance to power level of fusion point.
(4) the present invention can be applicable to the fused fiber splice process between same fiber and variety classes, is the fusion point disposal route that a kind of adaptability is wider.
Accompanying drawing explanation
Fig. 1 is the doubly clad optical fiber fusion point light scattering diagram through heavy coating processing;
Fig. 2 is three kinds and causes fiber optic splicing loss mode schematic diagram;
Fig. 3 scattered light propagates schematic diagram in recoat coating and Air Interface, and wherein (a) is the direct scattering schematic diagram of light, and (b) is totally reflected schematic diagram at recoat coating and Air Interface for light;
Fig. 4 is the doubly clad optical fiber profile schematic diagram adopting the inventive method process;
Fig. 5 is the schematic diagram that optical fiber after welding is placed in encapsulating structure;
Fig. 6 is two-layer light transmission protective layer schematic diagram of the present invention, and wherein (a) is three-decker cross-sectional view, and (b) is column structure cross-sectional view, and (c) is three layers of cross-sectional view of distortion;
Fig. 7 is doubly clad optical fiber fusion point disposal route schematic diagram of the present invention.
Embodiment
Welding between traditional single cladded-fiber or the welding between doubly clad optical fiber are all by heavy coating processing to improve welding quality, the heating of reduction fusion point.For doubly clad optical fiber, through heavy coating processing doubly clad optical fiber fusion point as shown in Figure 1, comprise optical fiber 11,12, optical fiber 11 and optical fiber 12 include optical fiber coating and surrounding layer 21, optical fiber inner cladding 22, fiber core 23, optical fiber 11 there is optical fiber coating divest a little 313, optical fiber 12 has optical fiber coating divests a little 312, covering transmission pump light 308 and 310, fibre core signal transmission light 309, recoat coating 314, optical fiber fusion welding point 24.
Fusion point splice loss, splice attenuation mainly contains three kinds, and as shown in Figure 2, fiber axis tilts, fiber axis departs from and model field unbalance.When fusion point welding quality is poor, covering can be caused to transmit pump light 308,310 for fusion point loss and flashlight 309 is revealed from fusion point.Owing to being air outside recoat coating, refractive index is less than recoat cladding refractive index n
l, therefore, when scattered light has two kinds of situations at recoat coating and Air Interface propagation:
1 when incident light beam strikes angle is less than critical angle
light can scatter out, as shown in (a) in Fig. 3 by diameter.
2 when incident light beam strikes angle is greater than critical angle
time, light can be totally reflected at recoat coating and Air Interface, as shown in (b) in Fig. 3, after multiple reflections, the final optical fiber coating that arrives divests a little 312,313 places, be point of discontinuity because optical fiber coating divests a little 312,313 places by the coat divested, so light is gathered in and also scattering occurs at this after this reflections many, cause temperature to raise, even cause optical fiber to damage herein.
Therefore, fusion point heating can not effectively be reduced by heavy coating processing.Welding between single cladded-fiber has same problem.
Solve fusion point place scattered light after multiple total reflection, to be gathered in recoat to cover point of discontinuity and cause optical fiber damage problem, need process fusion point, ultimate principle destroys the total reflection condition of light at recoat coating and Air Interface place.
For solving the heating of fusion point place, particularly weigh burnout problems because scattered light easily causes optical fiber recoat to cover with optical fiber coating after fusion point, the present invention proposes a kind of optical fiber fusion welding point disposal route, when optical fiber is doubly clad optical fiber, flow process as shown in Figure 7, comprises the following steps:
Step one: remove the coat around two optical fiber 11,12 fusion points and surrounding layer 21, makes the optical fiber inner cladding 22 near fusion point 24 and fusion point exposed, two optical fiber is carried out welding;
Step 2: the exposed inner cladding segment near fusion point and fusion point makes two-layer light transmission protective layer; make near fusion point and fusion point, to be respectively inner cladding 22, first light transmission protective layer 25 from inside to outside; second light transmission protective layer 26, refractive index is respectively n from inside to outside
0, n
1, n
2.First light transmission protective layer 25 is generally optical gel or optical gel or light-transmitting wave guide structure, and the second light transmission protective layer 26 can be optical gel or light-transmitting wave guide structure; All fit tightly without air between two light transmission protective layers and between light transmission protective layer and optical fiber; Between two-layer light transmission protective layer and inner cladding, index of refraction relationship meets: n
1<n
2, n
1<n
0.As shown in Figure 4.
Step 3: optical fiber and two light transmission protective layers are placed in the encapsulating structure with water cooling plant; under the state that water cooling plant does not work; logical light; judge whether described fiber work temperature is greater than 60 degree; if be not more than, then optical fiber fusion welding point process completes, otherwise; utilize described water cooling plant to lower the temperature for optical fiber, optical fiber fusion welding point process completes.After optical fiber fusion welding point process completes, can with other equipment or Fiber connection, formed fiber laser, if fiber work temperature is greater than 60 degree, then water cooling plant in light laser works process always for optical fiber lower the temperature.
As shown in Figure 5, encapsulating structure is the shape metallic leak-proof structure 13 with cavity, and described cavity is for placing optical fiber; Water cooling plant comprises water inlet pipe 14 and rising pipe 15, and water inlet pipe 14 and rising pipe 15 and described cavity connects, reduce fiber work temperature by circulating of water.
When optical fiber is single cladded-fiber, comprise the following steps:
Step one: remove the coat around two optical fiber fusion welding points, make the fibre cladding near fusion point and fusion point exposed, two optical fiber are carried out welding;
Step 2: the exposed clad section near fusion point and fusion point makes two-layer light transmission protective layer, make to be respectively covering, the first light transmission protective layer 25, second light transmission protective layer 26 near fusion point and fusion point from inside to outside, refractive index is respectively n from inside to outside
3, n
1, n
2.First light transmission protective layer 25 is generally optical gel or optical gel or light-transmitting wave guide structure, and the second light transmission protective layer 26 can be optical gel or light-transmitting wave guide structure; All fit tightly without air between two light transmission protective layers and between light transmission protective layer and optical fiber; Between two-layer light transmission protective layer and covering, index of refraction relationship meets: n
3<n
1<=n
2.
Step 3: optical fiber and two light transmission protective layers are placed in the encapsulating structure with water cooling plant; under the state that water cooling plant does not work; logical light; judge whether described fiber work temperature is greater than 60 degree; if be not more than, then optical fiber fusion welding point process completes, otherwise; utilize described water cooling plant to lower the temperature for optical fiber, optical fiber fusion welding point process completes.After optical fiber fusion welding point process completes, can with other equipment or Fiber connection, formed fiber laser, if fiber work temperature is greater than 60 degree, then water cooling plant in light laser works process always for optical fiber lower the temperature.
Two optical fiber carrying out introduced details in the present invention are optical fiber of the same type or dissimilar optical fiber, as two passive doubly clad optical fibers, a passive doubly clad optical fiber and an active double clad fiber, a single-mode fiber and photonic crystal fiber, two photonic crystal fibers or two root multimode fibers etc.
As shown in Figure 6, two-layer light transmission protective layer of the present invention can be various structure, as shown in (a) in Fig. 6, it is typical three-decker cross-sectional view, two-layer is up and down the second light transmission protective layer 26, and middle layer is the first light transmission protective layer 25, and optical fiber is placed in the first light transmission protective layer 25; As shown in (b) in Fig. 6, be column structure cross-sectional view, skin is the second light transmission protective layer 26 of cylindrical hollow, and middle layer (hollow parts) is the first light transmission protective layer 25, and optical fiber is placed in the middle of the first light transmission protective layer 25; As shown in (c) in Fig. 6, be three layers of cross-sectional view of distortion, outer top is semi-cylindrical second light transmission protective layer 26, and bottom is with the second hollow light transmission protective layer 26, hollow parts is the first light transmission protective layer 25, and optical fiber is placed in the middle of the first light transmission protective layer 25; In fact, the structure of two-layer light transmission protective layer can be various forms, as long as ensure to fit tightly without air between the first light transmission protective layer 25, first light transmission protective layer 25 and covering 22.
The present invention processes fusion point and protects, and can effectively avoid fusion point to generate heat, and improves the resistance to optical power levels of fusion point.
Be more than the embodiment of this patent, but be not limited in this kind of embodiment.
The content be not described in detail in instructions of the present invention belongs to the known technology of those skilled in the art.
Claims (5)
1. an optical fiber fusion welding point disposal route, described optical fiber is doubly clad optical fiber, it is characterized in that comprising the following steps:
Step one: remove the coat around two optical fiber fusion welding points and surrounding layer, makes the optical fiber inner cladding near fusion point and fusion point exposed, two optical fiber is carried out welding;
Step 2: the exposed inner cladding outside near fusion point and fusion point makes the first light transmission protective layer and the second light transmission protective layer successively, the wherein refractive index n of the first light transmission protective layer
1the refractive index n of < second light transmission protective layer
2, and n
1the refractive index n of < inner cladding
0;
Step 3: the optical fiber with two-layer light transmission protective layer after step 2 process is placed in the encapsulating structure with water cooling plant; logical light; judge whether described fiber work temperature is greater than 60 degree; if be not more than; then optical fiber fusion welding point process completes; otherwise utilize described water cooling plant to lower the temperature for optical fiber, optical fiber fusion welding point process completes.
2. an optical fiber fusion welding point disposal route, described optical fiber is single cladded-fiber, it is characterized in that comprising the following steps:
Step one: remove the coat around two optical fiber fusion welding points, make the fibre cladding near fusion point and fusion point exposed, two optical fiber are carried out welding;
Step 2: the exposed covering outside near fusion point and fusion point makes the first light transmission protective layer and the second light transmission protective layer successively, the wherein refractive index n of covering
3the refractive index n of < first light transmission protective layer
1the refractive index n of <=second light transmission protective layer
2.
Step 3: the optical fiber with two-layer light transmission protective layer after step 2 process is placed in the encapsulating structure with water cooling plant; logical light; judge whether described fiber work temperature is greater than 60 degree; if be not more than; then optical fiber fusion welding point process completes; otherwise utilize described water cooling plant to lower the temperature for optical fiber, optical fiber fusion welding point process completes.
3. a kind of optical fiber fusion welding point disposal route according to claim 1 and 2; it is characterized in that: described first light transmission protective layer is attached most importance to coat or optical gel or light-transmitting wave guide structure; second light transmission protective layer is optical gel or light-transmitting wave guide structure, all fits tightly without air between two-layer light transmission protective layer, between the first light transmission protective layer and optical fiber.
4. a kind of optical fiber fusion welding point disposal route according to claim 1 and 2, is characterized in that: in described step 3, encapsulating structure is the shape metallic leak-proof structure (13) with cavity, and described cavity is for placing optical fiber; Water cooling plant comprises water inlet pipe (14) and rising pipe (15), water inlet pipe (14) and rising pipe (15) and described cavity connects, reduces fiber work temperature by circulating of water.
5. a kind of optical fiber fusion welding point disposal route according to claim 1 and 2, is characterized in that: described two optical fiber are optical fiber of the same type or dissimilar optical fiber.
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|---|---|---|---|
| CN201610121255.2A CN105572802A (en) | 2016-03-03 | 2016-03-03 | Fiber welding point processing method |
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|---|---|---|---|
| CN201610121255.2A CN105572802A (en) | 2016-03-03 | 2016-03-03 | Fiber welding point processing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094111A (en) * | 2016-08-30 | 2016-11-09 | 中国工程物理研究院激光聚变研究中心 | A kind of processing method of welding optic fibre |
| CN106226866A (en) * | 2016-08-31 | 2016-12-14 | 长沙湘计海盾科技有限公司 | A kind of guard method of fused fiber splice |
| CN106405743A (en) * | 2016-12-19 | 2017-02-15 | 中国工程物理研究院激光聚变研究中心 | Cooling device and manufacture method thereof |
| CN107976741A (en) * | 2017-11-27 | 2018-05-01 | 天津艾洛克通讯设备科技有限公司 | A kind of cool fine disk of novel optical fiber heat sealing machine |
| CN109407214A (en) * | 2017-08-17 | 2019-03-01 | 广东安捷康光通科技有限公司 | To the device and method of different core diameter band fibre weldings |
| CN114063214A (en) * | 2021-10-25 | 2022-02-18 | 广东利元亨智能装备股份有限公司 | High-power optical fiber fusion point processing method and device |
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| CN204116642U (en) * | 2014-09-19 | 2015-01-21 | 深圳朗光科技有限公司 | A kind of fibre cladding residual light energy stripper and optical-fiber bundling device |
| CN204631286U (en) * | 2015-04-28 | 2015-09-09 | 大族激光科技产业集团股份有限公司 | Cladding light stripper and cladding light stripper cooling system |
| CN204758864U (en) * | 2015-05-28 | 2015-11-11 | 北京航天控制仪器研究所 | High power fiber cladding power strips and scattered light suppression device dorsad |
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| CN102207591A (en) * | 2010-03-30 | 2011-10-05 | 株式会社藤仓 | Light-emitting module |
| CN204116642U (en) * | 2014-09-19 | 2015-01-21 | 深圳朗光科技有限公司 | A kind of fibre cladding residual light energy stripper and optical-fiber bundling device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094111A (en) * | 2016-08-30 | 2016-11-09 | 中国工程物理研究院激光聚变研究中心 | A kind of processing method of welding optic fibre |
| CN106094111B (en) * | 2016-08-30 | 2019-04-19 | 中国工程物理研究院激光聚变研究中心 | A kind of processing method of welding optic fibre |
| CN106226866A (en) * | 2016-08-31 | 2016-12-14 | 长沙湘计海盾科技有限公司 | A kind of guard method of fused fiber splice |
| CN106226866B (en) * | 2016-08-31 | 2018-12-04 | 长沙湘计海盾科技有限公司 | A kind of guard method of fused fiber splice |
| CN106405743A (en) * | 2016-12-19 | 2017-02-15 | 中国工程物理研究院激光聚变研究中心 | Cooling device and manufacture method thereof |
| CN106405743B (en) * | 2016-12-19 | 2019-04-26 | 中国工程物理研究院激光聚变研究中心 | Cooling device and its manufacturing method |
| CN109407214A (en) * | 2017-08-17 | 2019-03-01 | 广东安捷康光通科技有限公司 | To the device and method of different core diameter band fibre weldings |
| CN107976741A (en) * | 2017-11-27 | 2018-05-01 | 天津艾洛克通讯设备科技有限公司 | A kind of cool fine disk of novel optical fiber heat sealing machine |
| CN114063214A (en) * | 2021-10-25 | 2022-02-18 | 广东利元亨智能装备股份有限公司 | High-power optical fiber fusion point processing method and device |
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Application publication date: 20160511 |