CN104297849A - Welding method for photonic crystal fibers - Google Patents
Welding method for photonic crystal fibers Download PDFInfo
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- CN104297849A CN104297849A CN201410621287.XA CN201410621287A CN104297849A CN 104297849 A CN104297849 A CN 104297849A CN 201410621287 A CN201410621287 A CN 201410621287A CN 104297849 A CN104297849 A CN 104297849A
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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
-
- 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
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
-
- 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
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a welding method for photonic crystal fibers. The method comprises the following steps: (1) preprocessing fiber end surfaces: wherein the welding ends of the two photonic crystal fibers to be welded are cleaned and cut; (2) fixing and aligning the fibers: wherein the welding ends of the two photonic crystal fibers to be welded are fixed on a fixture of a welding machine, and after the center lines of the fibers are adjusted to be aligned to a polarization axis, the distance between the end surfaces of the two welding ends is 5-15 [mu]m; (3) welding the fibers: wherein the welding machine is discharged for welding the welding ends of the two photonic crystal fibers, during welding, the end surfaces of the two welding ends move face to face, so that the overlapping degree is 8-20 [mu]m, and the surface temperature of the fibers is 1,400-1,600 DEG C and is kept for 50-80 ms. Through the adoption of the method disclosed by the invention, the photonic crystal fibers are mutually welded, high strength and low loss of the welding points of the photonic crystal fibers are ensured, and subsidence is avoided.
Description
Technical field
The present invention relates to fiber optic connection technology, specifically relate to a kind of welding process of photonic crystal fiber.
Background technology
Photonic crystal fiber is different from the conventional solid core fibres of prior art, and it is retrained light by the micro air-holes arranged vertically in covering, thus realizes the axis transmission of light.Unique waveguiding structure, makes photonic crystal fiber have many unrivaled characteristics compared with conventional fiber, as unlimited single mode, temperature-insensitive, bend-insensitive, radioresistance etc.The very big range of application must widening photonic crystal fiber of these characteristics, the sensor, optical device etc. of the increasing unique properties that utilized Design of Photonic Crystal Fiber to go out.Clearly, but the porous structure of himself also brings a lot of problem to application to the advantage of photonic crystal fiber.Picture is applied in the welding process of ordinary optic fibre, and it is impracticable for being directly applied in photonic crystal fiber, there is hole and collapses, and splice loss, splice attenuation is large, the problems such as intensity is low.
The Joshua M.Kvavle of Utah, USA Brigham Young University, Stephen M.Schultz, and Richard H.Selfridge have studied the experiment of variety classes fused fiber splice.By his research, surperficial different types of fused fiber splice process need could reduce splice loss, splice attenuation through a transition welding, and the average splice loss, splice attenuation of the 0.17dB finally achieving variety classes optical fiber.The method is just applicable to solid type optical fiber, and is not suitable for photonic crystal fiber.【Joshua?M.Kvavle,Stephen?M.Schultz,and?Richard?H.Selfridge，Low?loss?elliptical?core?D-fiber?to?PANDA?fiber?fusion?splicing，OPTICS?EXPRESS，Vol.16,No.18，2008，pp13552-13559】
The people such as the John P.Wooler of Southampton University of Southampton have studied the experiment of the mutual welding of a kind of Hollow-Core Photonic Crystal Fibers, and this experiment surface can realize the splice loss, splice attenuation of average about 0.2dB by controlling subsiding in fusion process.But this article does not provide concrete method introduction, and does not provide alignment methods.【John?P.Wooler,David?Gray,Francesco?Poletti,Marco?N.Petrovich,Natalie?V?Wheeler,Francesca?Parmigiani?and?David?J.Richardson，Robust?Low?Loss?Splicing?of?Hollow?Core?Photonic?Bandgap?Fiber?to?Itself，OFC?2013，OM3I.5】
China's application number is a kind of method that 201210359961.2 patent application publication describe welding polarization-maintaining photonic crystal fiber and panda protecting polarized light fiber, represents that the method can realize the average splice loss, splice attenuation of 0.95dB.The method by biasing technique, in the heating of solid core fibres end, achieves two kinds of different fused fiber splices, achieve axle and overcome collapsing of photonic crystal fiber, but splice loss, splice attenuation is up to 0.95dB.
Summary of the invention
The technical problem to be solved in the present invention is exactly overcome two with the difficult problem in photon crystal optical fiber fusion splicing process, as collapsed, to axle, the problem such as splice loss, splice attenuation is large, intensity is not high, propose a kind of method of photonic crystal fiber and the mutual welding of photonic crystal fiber, loss is little, and intensity is high.
Technical matters of the present invention is achieved through the following technical solutions.
A welding process for photonic crystal fiber, comprises the following steps: step (1), fiber end face pre-service: will treat that the welding end of two photonic crystal fibers of welding is clean, cutting; Step (2), optical fiber is fixed, aim at: be fixed on the fixture of heat sealing machine by the welding end of two photonic crystal fibers treating welding, and adjustment fiber optic hub line and polarization axle are aimed at, after aligning, two welding end end distances 5 ~ 15 μm.Step (3), fused fiber splice: the welding end welding of heat sealing machine electric discharge to two photonic crystal fibers, during welding, two welding end end faces are passed in opposite directions and made degree of overlapping be 8 ~ 20 μm, and fiber surface temperature is 1400 ~ 1600 DEG C, keep 50 ~ 80ms.
In described step (3), the width of heating of two photon crystal optical fiber fusion splicing ends is respectively 200 ~ 1000 μm.
Described heat sealing machine adopts the tungsten lamp heat welded of arc discharge heat welded or band blanket gas or adopts CO
2laser instrument heat welded.
In described step (2), one follow the non-welding end of photonic crystal fiber to connect a light source wherein, connect a light power meter at the non-welding end of another root crystal optical fibre.
Described photonic crystal fiber to be overall diameter the be photonic crystal fiber of 125 μm.
The present invention is compared with the prior art had beneficial effect: the mutual welding that inventors have investigated polarization-maintaining photonic crystal fiber or photonic crystal fiber, under selected splicing parameter, the mutual welding of photonic crystal fiber can be realized, and ensure that the fusion point high strength of photonic crystal fiber and low splice loss, splice attenuation simultaneously, avoid generation of subsiding.Meanwhile, adopt the welding process carrying out monitoring with light source and light power meter in this method can reduce splice loss, splice attenuation better, minimum splice loss, splice attenuation can reach about 0.1dB.The technology of the present invention may be used for the welding carrying out polarization-maintaining photonic crystal fiber and polarization-maintaining photonic crystal fiber, or carry out the welding of photonic crystal fiber and photonic crystal fiber, making photonic crystal fiber comprise the polarization-maintaining photonic crystal fiber use that directly continues becomes possibility.
Embodiment
In present embodiment, following process is comprised to the welding process of polarization-maintaining photonic crystal fiber:
1) pre-service is carried out in the end for the treatment of two optical fiber of welding, and described pre-service comprises successively removes coat, cleaning, end face fixed length cutting.
2) on fixture optical fiber being fixed on heat sealing machine, the adjustment of optical fiber center line and off-axis angle, realizes the aligning that two are treated welding optic fibre.
3) polarization shaft alignement, refers to by rotating, the fast and slow axis of two polarization-maintaining photonic crystal fibers be rotated to same position under end face monitoring.
4) adopt light source to assist alignment function, be connected to by light source on the photonic crystal fiber of side, test output power, is connected on opposite side photonic crystal fiber by light power meter, test output power, preresearch estimates coupling loss; Regulate aligning under utilizing light power meter to monitor, the standard of adjustment is that the luminous power of testing is maximum.
5) welding is carried out.As adopted 100P+ electric arc type heat sealing machine, then comprise successively preheat, heating and the step such as circulating-heating again.Long-time heating step is then comprised as adopted Vytran company ffs2000 tungsten filament filament heating.As adopted CO2 laser welding machine, then heat under setting power.Ensure that optical fiber width of heating is respectively 200 ~ 1000 μm, 5 ~ 15 μm, fiber end face interval, welding degree of overlapping is 8 ~ 20 μm, and fiber surface temperature is 1400 ~ 1600 DEG C, keeps 50 ~ 80ms.
Embodiment 1
Adopting 100P+ welding, is that the polarization-maintaining photonic crystal fiber instrument of 80 μm peels coating material off and clean by needing the overall diameter of welding; An intact end face is obtained with the cutting of optical fiber specific purpose tool; Start to arrange heat sealing machine parameter: a) cutting angle is defined as 2 °, cutting profile mistake is standard, and fiber angle is set as 1 °, and loss limits 0.2dB, and discharge centers limits closes.B) main discharge power setting is-40bit, and main discharge time 60ms overlaps as 12um, fiber end face interval 13um.Be connected to by 1310nm light source on the photonic crystal fiber of side, test output power is 0.48mW; The polarization-maintaining photonic crystal fiber carrying out end face is fixed on clamp of welding machine and aims at; Light power meter is connected on opposite side photonic crystal fiber, test output power 0.45mW; Preresearch estimates coupling loss 0.28dB, the imaging of polarization-maintaining photonic crystal fiber end face is carried out axle; Welding is carried out in electric discharge.Reading output power from the light power meter connected is 0.457mW, and estimation splice loss, splice attenuation is 0.21dB.The complete optical fiber dedicated testing platform on Vytran company ffs2000 family machine of welding is fixed, and arranging tension force is 8N, and through test, fusion point does not rupture, and shows that fused fiber splice intensity is more than 8N.When testing under the tension force of 9N, fibercuts.
The complete optical fiber of welding shows through test: the splice loss, splice attenuation mean value of optical fiber is 0.21dB; Optical fiber after welding is good through the tension test performance of 8N.
Embodiment 2
Adopting Vytran company ffs2000 heat sealing machine, is that the polarization-maintaining photonic crystal fiber instrument of 125 μm peels coating material off and clean by needing the overall diameter of welding; An intact end face is obtained with the cutting of optical fiber specific purpose tool; Start to arrange heat sealing machine parameter: protection argon flow amount is arranged to 0.65 liter/min, and optical fiber initial gap is set to 11um, and tungsten filament filament wattage is 14.7W, and weld time is arranged to 1.5 seconds, overlaps into 13um after heating.Be connected to by 1310nm light source on the photonic crystal fiber of side, test output power is 0.47mW; The polarization-maintaining photonic crystal fiber carrying out end face is fixed on clamp of welding machine and aims at; Light power meter is connected on opposite side photonic crystal fiber, test output power 0.44mW; Preresearch estimates coupling loss 0.286dB, the imaging of polarization-maintaining photonic crystal fiber end face is carried out axle; Welding is carried out in electric discharge.Reading output power from the light power meter connected is 0.454mW, and estimation splice loss, splice attenuation is 0.15dB.The complete optical fiber dedicated testing platform on Vytran company ffs2000 family machine of welding is fixed, and arranging tension force is 9N, and through test, fusion point does not rupture, and shows that fused fiber splice intensity is more than 9N.Further measuring fiber is not had to be greater than the pulling strengrth of 9N.
The complete optical fiber of welding shows through test: the splice loss, splice attenuation mean value of optical fiber is 0.15dB; Optical fiber after welding is good through the tension test performance of 9N, and the observation under the visual field of amplifying of the external diameter of optical fiber is not shunk or distortion.
Embodiment 3
Adopting the welding of CO2 laser fiber heat sealing machine, is that the polarization-maintaining photonic crystal fiber instrument of 125 μm peels coating material off and clean by needing the overall diameter of welding; An intact end face is obtained with the cutting of optical fiber specific purpose tool; Start to arrange heat sealing machine parameter: a) cutting angle is defined as 2 °, cutting profile mistake is standard, and fiber angle is set as 1 °, and loss limits 0.2dB, and discharge centers limits closes.B) laser power of welding is set to 8W, continuous action time 1s, overlaps as 12um, fiber end face interval 13um.Be connected to by 1310nm light source on the photonic crystal fiber of side, test output power is 0.4mW; The polarization-maintaining photonic crystal fiber carrying out end face is fixed on clamp of welding machine and aims at; Light power meter is connected on opposite side photonic crystal fiber, test output power 0.39mW; Preresearch estimates coupling loss 0.11dB, the imaging of polarization-maintaining photonic crystal fiber end face is carried out axle; Welding is carried out in electric discharge.Reading output power from the light power meter connected is 0.39mW, and estimation splice loss, splice attenuation is 0.11dB.The complete optical fiber dedicated testing platform on ffs2000 of welding is fixed, and arranging tension force is 9N, and through test, fusion point does not rupture, and shows that fused fiber splice intensity is more than 9N.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. a welding process for photonic crystal fiber, is characterized in that, comprises the following steps:
Step (1), fiber end face pre-service: will treat that the welding end of two photonic crystal fibers of welding is clean, cutting;
Step (2), optical fiber is fixed, aim at: be fixed on the fixture of heat sealing machine by the welding end of two photonic crystal fibers treating welding, and adjustment fiber optic hub line and polarization axle are aimed at, after aligning, two welding end end distances 5 ~ 15 μm.
Step (3), fused fiber splice: the welding end welding of heat sealing machine electric discharge to two photonic crystal fibers, during welding, two welding end end faces are passed in opposite directions and made degree of overlapping be 8 ~ 20 μm, and fiber surface temperature is 1400 ~ 1600 DEG C, keep 50 ~ 80ms.
2. the welding process of photonic crystal fiber as claimed in claim 1, it is characterized in that: in described step (3), the width of heating of two photon crystal optical fiber fusion splicing ends is respectively 200 ~ 1000 μm.
3. the welding process of photonic crystal fiber as claimed in claim 2, is characterized in that: described heat sealing machine adopts the tungsten lamp heat welded of arc discharge heat welded or band blanket gas or adopts CO
2laser instrument heat welded.
4. the welding process of photonic crystal fiber as claimed in claim 2, it is characterized in that: in described step (2), one follow the non-welding end of photonic crystal fiber to connect a light source wherein, connect a light power meter at the non-welding end of another root crystal optical fibre.
5. the welding process of the photonic crystal fiber as described in claim 1,2,3 or 4, is characterized in that: described photonic crystal fiber to be overall diameter the be photonic crystal fiber of 125 μm.
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| CN201410621287.XA CN104297849B (en) | 2014-11-06 | 2014-11-06 | Welding method for photonic crystal fibers |
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| CN104297849B CN104297849B (en) | 2017-04-19 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106443885A (en) * | 2016-07-05 | 2017-02-22 | 中国航空工业集团公司西安飞行自动控制研究所 | Method of realizing low-loss welding of pohotonic crystal fiber and solid fiber |
| CN106908902A (en) * | 2017-04-14 | 2017-06-30 | 上海康阔光传感技术股份有限公司 | Optical fiber splicer and optical fiber splicing method |
| CN107703585A (en) * | 2017-09-27 | 2018-02-16 | 杨沁玥 | A kind of high efficiency fusion joining process |
| CN107759063A (en) * | 2017-11-03 | 2018-03-06 | 中国科学院西安光学精密机械研究所 | A kind of transparent material welder and its method |
| CN111076715A (en) * | 2019-12-05 | 2020-04-28 | 河北汉光重工有限责任公司 | 60um optical fiber-based fiber-optic gyroscope system and optical fiber fusion splicing method |
| CN111352188A (en) * | 2020-01-09 | 2020-06-30 | 陕西华燕航空仪表有限公司 | Optical fiber fusion splicing method |
| CN111855145A (en) * | 2020-07-30 | 2020-10-30 | 成都中住光纤有限公司 | Use method of optical fiber macrobend testing device |
| CN117724209A (en) * | 2024-02-08 | 2024-03-19 | 苏州英谷激光有限公司 | Butt joint method suitable for large-mode-field polarization-maintaining photonic crystal fiber |
| CN117724209B (en) * | 2024-02-08 | 2024-06-04 | 苏州英谷激光科技股份有限公司 | Butt joint method suitable for large-mode-field polarization-maintaining photonic crystal fiber |
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| CN111076715A (en) * | 2019-12-05 | 2020-04-28 | 河北汉光重工有限责任公司 | 60um optical fiber-based fiber-optic gyroscope system and optical fiber fusion splicing method |
| CN111076715B (en) * | 2019-12-05 | 2022-11-25 | 河北汉光重工有限责任公司 | 60um optical fiber-based fiber-optic gyroscope system and optical fiber fusion splicing method |
| CN111352188A (en) * | 2020-01-09 | 2020-06-30 | 陕西华燕航空仪表有限公司 | Optical fiber fusion splicing method |
| CN111352188B (en) * | 2020-01-09 | 2022-05-24 | 陕西华燕航空仪表有限公司 | Optical fiber welding method |
| CN111855145A (en) * | 2020-07-30 | 2020-10-30 | 成都中住光纤有限公司 | Use method of optical fiber macrobend testing device |
| CN117724209A (en) * | 2024-02-08 | 2024-03-19 | 苏州英谷激光有限公司 | Butt joint method suitable for large-mode-field polarization-maintaining photonic crystal fiber |
| CN117724209B (en) * | 2024-02-08 | 2024-06-04 | 苏州英谷激光科技股份有限公司 | Butt joint method suitable for large-mode-field polarization-maintaining photonic crystal fiber |
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