CN104297849B - Welding method for photonic crystal fibers - Google Patents
Welding method for photonic crystal fibers Download PDFInfo
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- CN104297849B CN104297849B CN201410621287.XA CN201410621287A CN104297849B CN 104297849 B CN104297849 B CN 104297849B CN 201410621287 A CN201410621287 A CN 201410621287A CN 104297849 B CN104297849 B CN 104297849B
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- welding
- photonic crystal
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- crystal fiber
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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)
- Mechanical Coupling Of Light Guides (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (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, is specifically related to a kind of welding process of photonic crystal fiber.
Background technology
Photonic crystal fiber is different from the solid core fibres that prior art is commonly used, and it is by axially aligned small in covering
Airport enters row constraint to light, so as to realize the axial direction transmission of light.Unique waveguiding structure so that photonic crystal fiber and routine
Optical fiber is compared with many unrivaled characteristics, such as unlimited single mode, temperature-insensitive, bend-insensitive, radioprotective.This
The very big range of application that must have widened photonic crystal fiber of a little characteristics, using Design of Photonic Crystal Fiber increasing property has been gone out
Sensor, optical device that can be unique etc..The advantage of photonic crystal fiber is it is obvious that but the loose structure of its own is also applied band
Many problems are carried out.As applying the welding process in ordinary optic fibre, it is impracticable to be directly applied to photonic crystal fiber, is existed
Hole is collapsed, and splice loss, splice attenuation is big, the problems such as low intensity.
The Joshua M.Kvavle, Stephen of Utah, USA Brigham Young University
M.Schultz, and Richard H.Selfridge have studied the experiment of variety classes fused fiber splice.By his research, table
The different types of fused fiber splice process in face needs that through a transition welding splice loss, splice attenuation could be reduced, and finally realizes difference
Plant the average splice loss, splice attenuations of 0.17dB of type optical fiber.The method is simply adapted 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】
John P.Wooler of Southampton University of Southampton et al. have studied a kind of mutual welding of Hollow-Core Photonic Crystal Fibers
Experiment, the experiment surface can by controlling fusion process in subside realizing the splice loss, splice attenuation of average 0.2dB or so.But
It is that this article does not provide specific 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】
The patent application publication of Chinese Application No. 201210359961.2 describes a kind of welding and protects inclined photonic crystal
Optical fiber and the method for panda protecting polarized light fiber, represent that the method can realize the average splice loss, splice attenuation of 0.95dB.The method is by inclined
Technology is put, in the heating of solid core fibres end, two kinds of different fused fiber splices is realized, is realized countershaft and is overcome photonic crystal light
Fine collapses, but splice loss, splice attenuation is up to 0.95dB.
The content of the invention
The technical problem to be solved in the present invention is exactly to overcome two with the difficult problem during photon crystal optical fiber fusion splicing, is such as collapsed
The problems such as contracting, countershaft, splice loss, splice attenuation are greatly, intensity is not high, proposes a kind of photonic crystal fiber and the mutual welding of photonic crystal fiber
Method, be lost little, intensity is high.
The technical problem of the present invention is achieved through the following technical solutions.
A kind of welding process of photonic crystal fiber, comprises the following steps：Step (1), fiber end face pretreatment：Will be fusion
The welding end cleaning of two photonic crystal fibers for connecing, cutting；Step (2), optical fiber is fixed, is aligned：Two light of welding will be treated
The welding end of photonic crystal fiber is fixed on the fixture of heat sealing machine, and adjustment fiber optic hub line and polarization axle are aligned, after alignment, two
5～15 μm of welding end end distance.Step (3), fused fiber splice：Heat sealing machine electric discharge is melted to the welding end of two photonic crystal fibers
Connect, during welding, two welding end end faces elapse cause degree of overlapping to be 8～20 μm in opposite directions, and fiber surface temperature is 1400～1600
DEG C, keep 50～80ms.
In the step (3), the width of heating at two photon crystal optical fiber fusion splicing ends is respectively 200～1000 μm.
The heat sealing machine is using arc discharge heat welded or the tengsten lamp heat welded with protective gas or adopts CO2
Laser instrument heat welded.
In the step (2), wherein one with photonic crystal fiber non-welding end connect a light source, in another crystal
The non-welding end of optical fiber connects a light power meter.
The photonic crystal fiber is photonic crystal fiber that overall diameter is 125 μm.
The present invention is compared with the prior art and is had an advantageous effect in that：Inventor have studied polarization-maintaining photonic crystal fiber or
The mutual welding of person's photonic crystal fiber, under selected splicing parameter, it is possible to achieve the mutual welding of photonic crystal fiber, and
The fusion point high intensity and low splice loss, splice attenuation of photonic crystal fiber is ensure that simultaneously, it is to avoid generation of subsiding.Meanwhile, using this method
Middle preferably to reduce splice loss, splice attenuation with the welding process that light source and light power meter are monitored, minimum splice loss, splice attenuation can reach
Arrive 0.1dB or so.The technology of the present invention can be used for carrying out the welding of polarization-maintaining photonic crystal fiber and polarization-maintaining photonic crystal fiber, or
Carry out the welding of photonic crystal fiber and photonic crystal fiber so that photonic crystal fiber includes that polarization-maintaining photonic crystal fiber is direct
Continue using being possibly realized.
Specific embodiment
Procedure below is included to the welding process of polarization-maintaining photonic crystal fiber in present embodiment：
1) treating the end of two optical fiber of welding carries out pretreatment, and the pretreatment includes removing successively coat, clear
Wash, end face fixed length cutting.
2) optical fiber is fixed on the adjustment of optical fiber centrage and off-axis angle on the fixture of heat sealing machine, realizes that two are treated welding
The alignment of optical fiber.
3) shaft alignement is polarized, refers to and revolved the fast and slow axis of two polarization-maintaining photonic crystal fibers by rotation under end face monitoring
Go to same position.
4) using light source alignment function, light source is connected on the photonic crystal fiber of side, tests output, will
Light power meter is connected on opposite side photonic crystal fiber, tests output, preresearch estimates coupling loss；Using light power meter
Monitoring is lower to adjust alignment, and the standard of regulation is the maximum optical power of test.
5) welding is carried out.100P+ electric arc type heat sealing machines are such as adopted, then includes successively preheating, reheating and circulating-heating
Etc. step.Long-time heating step is included if using Vytran companies ffs2000 tungsten filament filament heatings.Such as adopt CO2 laser
Heat sealing machine, then heat under setting power.Ensure that optical fiber width of heating is respectively 200～1000 μm, fiber end face is spaced 5～15 μ
M, welding degree of overlapping is 8～20 μm, and fiber surface temperature is 1400～1600 DEG C, keeps 50～80ms.
Embodiment 1
Using 100P+ weldings, it would be desirable to which the overall diameter of welding is that 80 μm of polarization-maintaining photonic crystal fiber instrument peels painting off
Layer material is simultaneously cleaned；An intact end face is obtained with the cutting of optical fiber specific purpose tool；Start setting up heat sealing machine parameter：A) cutting angle
2 ° are defined to, cutting profile mistake is standard, fiber angle is set as 1 °, and loss limits 0.2dB, and discharge centers are limited closes.b)
Main discharge power setting is -40bit, main discharge time 60ms, is overlapped as 12um, fiber end face interval 13um.Will
1310nm light sources are connected on the photonic crystal fiber of side, and test output is 0.48mW；Guarantor's polarisation of end face will be carried out
Crystal optical fibre is fixed on clamp of welding machine and is aligned；Light power meter is connected on opposite side photonic crystal fiber, is tested
Output 0.45mW；Preresearch estimates coupling loss 0.28dB, polarization-maintaining photonic crystal fiber end face imaging carries out countershaft；Discharge into
Row welding.It is 0.457mW that output is read from the light power meter of connection, and estimation splice loss, splice attenuation is 0.21dB.Welding is complete
Optical fiber dedicated testing platform on Vytran companies ffs2000 series machines is fixed, and setting tension force is 8N, through test, fusion point
Do not rupture, show fused fiber splice intensity 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 meansigma methodss of optical fiber are 0.21dB；Optical fiber Jing after welding
The tension test performance for crossing 8N is good.
Embodiment 2
Using Vytran companies ffs2000 heat sealing machines, it would be desirable to which the overall diameter of welding is 125 μm of the inclined photonic crystal light of guarantor
Fibre instrument is peeled coating material off and is cleaned；An intact end face is obtained with the cutting of optical fiber specific purpose tool；Start setting up 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, weld time is arranged to 1.5 seconds, and 13um is overlapped into after heating.1310nm light sources are connected to into side photonic crystal
On optical fiber, test output is 0.47mW；The polarization-maintaining photonic crystal fiber for carrying out end face is fixed on into clamp of welding machine enterprising
Row alignment；Light power meter is connected on opposite side photonic crystal fiber, output 0.44mW is tested；Preresearch estimates coupling is damaged
Consumption 0.286dB, polarization-maintaining photonic crystal fiber end face imaging carries out countershaft；Electric discharge carries out welding.Read from the light power meter of connection
It is 0.454mW to go out output, and estimation splice loss, splice attenuation is 0.15dB.The complete optical fiber of welding is serial in Vytran companies ffs2000
Dedicated testing platform is fixed on machine, and setting tension force is 9N, and through test, fusion point does not rupture, and shows that fused fiber splice intensity exceedes
9N.Without further test optical fiber in the tensile strength more than 9N.
The complete optical fiber of welding shows through test：The splice loss, splice attenuation meansigma methodss of optical fiber are 0.15dB；Optical fiber Jing after welding
Cross the tension test performance of 9N well, and the external diameter of optical fiber observes no contraction or deformation under the visual field amplified.
Embodiment 3
Using CO2 laser fiber heat sealing machine weldings, it would be desirable to which the overall diameter of welding is 125 μm of polarization-maintaining photonic crystal fiber
Coating material is peeled off with instrument and clean；An intact end face is obtained with the cutting of optical fiber specific purpose tool；Start setting up heat sealing machine ginseng
Number：A) cutting angle is defined to 2 °, and cutting profile mistake is standard, and fiber angle is set as 1 °, and loss limits 0.2dB, electric discharge
Center limits closes.B) laser power of welding is set to 8W, continuous action time 1s, overlaps as 12um, between fiber end face
Every 13um.1310nm light sources are connected on the photonic crystal fiber of side, test output is 0.4mW；End face will be carried out
Polarization-maintaining photonic crystal fiber is fixed on clamp of welding machine and is aligned；Light power meter is connected to into opposite side photonic crystal fiber
On, test output 0.39mW；Preresearch estimates coupling loss 0.11dB, it is right that the imaging of polarization-maintaining photonic crystal fiber end face is carried out
Axle；Electric discharge carries out welding.It is 0.39mW that output is read from the light power meter of connection, and estimation splice loss, splice attenuation is 0.11dB.
Welding complete optical fiber dedicated testing platform on ffs2000 is fixed, and setting tension force is 9N, and through test, fusion point does not rupture, table
Mingguang City's fibre heat seal strength is more than 9N.
Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert this
It is bright to be embodied as being confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the protection of the present invention
Scope.
Claims (4)
1. a kind of welding process of photonic crystal fiber, it is characterised in that comprise the following steps：
Step (1), fiber end face pretreatment：The welding end for treating two photonic crystal fibers of welding is cleaned, cut；
Step (2), optical fiber is fixed, is aligned：The welding end for treating two photonic crystal fibers of welding is fixed on into the folder of heat sealing machine
On tool, adjustment fiber optic hub line and polarization axle are aligned, after alignment, two 5～15 μm of welding end end distances.
Step (3), fused fiber splice：The welding end welding that heat sealing machine discharges to two photonic crystal fibers, during welding, two photons
The width of heating at crystal optical fibre welding end is respectively 200～1000 μm, two welding end end faces in opposite directions passage cause degree of overlapping be 8～
20 μm, fiber surface temperature is 1400～1600 DEG C, keeps 50～80ms.
2. the welding process of photonic crystal fiber as claimed in claim 1, it is characterised in that：The heat sealing machine is put using electric arc
Electrical heating welding or the tengsten lamp heat welded with protective gas adopt CO2Laser instrument heat welded.
3. the welding process of photonic crystal fiber as claimed in claim 1, it is characterised in that：In the step (2), wherein
One connects a light source with the non-welding end of photonic crystal fiber, and at the non-welding end of another crystal optical fibre a luminous power is connected
Meter.
4. the welding process of the photonic crystal fiber as described in claim 1,2 or 3, it is characterised in that：The photonic crystal light
It is fine for photonic crystal fiber that overall diameter is 125 μm.
Priority Applications (1)
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| CN201410621287.XA CN104297849B (en) | 2014-11-06 | 2014-11-06 | Welding method for photonic crystal fibers |
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|---|---|---|---|
| CN201410621287.XA CN104297849B (en) | 2014-11-06 | 2014-11-06 | Welding method for photonic crystal fibers |
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| CN104297849A CN104297849A (en) | 2015-01-21 |
| CN104297849B true CN104297849B (en) | 2017-04-19 |
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| CN106443885B (en) * | 2016-07-05 | 2019-02-15 | 中国航空工业集团公司西安飞行自动控制研究所 | A method of realizing photonic crystal fiber and solid core fibres low loss welding |
| 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 |
| CN107759063B (en) * | 2017-11-03 | 2019-09-27 | 中国科学院西安光学精密机械研究所 | Transparent material welding device and method thereof |
| 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 |
| 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 |
| 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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