CN106646747A - Method for manufacturing photonic crystal fiber integrated end caps - Google Patents
Method for manufacturing photonic crystal fiber integrated end caps Download PDFInfo
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- CN106646747A CN106646747A CN201710000718.4A CN201710000718A CN106646747A CN 106646747 A CN106646747 A CN 106646747A CN 201710000718 A CN201710000718 A CN 201710000718A CN 106646747 A CN106646747 A CN 106646747A
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- Prior art keywords
- optical fiber
- photonic crystal
- fiber
- microns
- collapsing
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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
- G02B6/25—Preparing the ends of light guides for coupling, e.g. cutting
Abstract
The invention discloses a method for manufacturing photonic crystal fiber integrated end caps. The method has the advantages that photonic crystal fibers with air holes are rotationally heated by the aid of carbon dioxide laser devices according to certain rotation speeds and heating power, the air holes can be uniformly synchronously collapsed and solidified, the photonic crystal fibers are further cut by fiber cutters, accordingly, the end caps with different end surface angles can be obtained, and application requirements on the large-mode-area photonic crystal fibers in the aspects of all-fiber laser devices and high-power laser can be met; the problem of insufficient weld strength due to uneven fiber cut sections when external quartz glass end caps and existing photonic crystal fibers are welded with one another can be solved, the seamlessly connected end caps can be obtained on the original photonic crystal fibers by means of direct collapsing, accordingly, follow-up treatment application can be facilitated, and the method is free of influence on the laser performance of the fibers.
Description
Technical field
The present invention relates to optical fiber, particularly a kind of preparation method of quartz glass photonic crystal fiber end cap.
Background technology
Photonic crystal fiber (Photonic crystal fiber, PCF), because it has endless single mode transmission, mould field
The characteristics such as area is controllable, high non-linearity, excellent birefringence effect and high-NA, thus in optic communication, high power transmission, light
The aspects such as fibre laser, super continuous spectrums have wide application.Its distinctive air pore structure so that it can not be as conventional quartz
Optical fiber is cut like that, welding.So must be processed PCF end faces using special process, such as welding end cap, a side
Face is improving the pollution caused because temperature rises of high power conditions lower surface and facet damage；On the other hand PCF ends are improved
The antibody Monoclonal threshold value in face, also lays the first stone for PCF all -fiber applications.Because PCF makes the particularity with structure, handling process is difficult
Degree is big, spends high, and in the world several companies such as only NKT can be with the high-quality welding for completing to hold cap.The country is in photon
The preparation of crystal optical fibre and the end face processing aspect of optical fiber also have larger gap with international most advanced level.
Traditional end caps are obtained using the cold worked technology of optics, then will be processed using optical fiber splicer
Cylindrical end cap carries out welding with optical fiber.This technology is relatively easy in all solid state end caps of welding double clad, but for sky
For the photonic crystal fiber of air hole structure, because the presence of air pore structure causes fiber cut and grinds all extremely difficult process,
Therefore carry out holding cap welding aspect to there is larger difficulty always.In the world NKT companies release band edge cap photonic crystal fiber,
Its technology of preparing is, based on special fusion techniques, using carbon dioxide laser cap will to be held to complete in 45° angle welding with optical fiber, its
Remain the air pore structure inside photonic crystal fiber.
Have not yet to see directly carries out melting to photonic crystal fiber and collapses the integrated end of preparation using carbon dioxide laser
The technology of preparing of cap.
The content of the invention
It is an object of the invention to provide a kind of preparation method of photonic crystal fiber integration end cap：Using carbon dioxide
Laser instrument, rotary heating is carried out by large mode field airport photonic crystal fiber according to certain rotating speed and heating power, is realized empty
The uniform synchronization of pore is collapsed solidification, further with optical fiber cutter cutting, obtains the end cap of different end plane angles；The method
The handling process of large mode field airport structure photonic crystal fiber end face is significantly improved, photonic crystal fiber integration is obtained
End cap, has greatly expanded the application potential of photonic crystal fiber.It is simple and practical with method of operating, low excellent of preparation cost
Point.
To reach above-mentioned purpose, the following technical scheme that we provide：
A kind of preparation method of photonic crystal fiber integration end cap, its feature is that the method comprises the following steps：
1) photonic crystal fiber that an external diameter is 400-600 microns is taken, first optical fiber surface is processed with analysis absolute alcohol, then will
Described optical fiber is placed in standard fiber fixture, and the distance of the position that optical fiber is clamped to fiber end face is 10cm；
2) described standard fiber fixture is placed in the fixture draw-in groove of optical fiber splicer, described optical fiber is placed in optical fiber welding
In two V-grooves for picking, the distance between two V-grooves are set to 4cm；It is recessed along V-groove by homemade M shapes V-groove cover plate
Sunken direction depresses, the flat presser feet of the centre of described M shape V-groove cover plates by described optical fiber be limited in flat presser feet with
In the range of the triangle of V-groove composition；
3) heat sealing machine parameter is set：Laser is 10.6 microns of carbon dioxide laser, and LASER HEATING power is 10W-20W；
Fiber spinning speed is 0.05-0.15 °/ms；Heat time is 9000-20000ms；
4) start heat sealing machine, launch laser, start timing, heating, rotation start simultaneously；Observation welding display screen, observation
Whether optical fiber rotates smoothly；If optical fiber is shaken, stop heating, cleaning V-groove and balance presser feet after repeat above step after
Continuous experiment；
5) the heating setpoint time is reached, optical fiber is taken out and is placed in basis of microscopic observation measurement, areas transparent of collapsing, region of collapsing
Length is 500-1000 microns；The length difference of adjacent two airport of region end face of collapsing is less than 10 microns；
6) region of collapsing of successful optical fiber of collapsing is placed under large-diameter fibre-optical cutter, on demand by fiber cut angle
Degree is set to 0-8 °, and reservation is collapsed, and to hold the length of cap be 40-300 microns for the length in region, is then cut.
Described photonic crystal fiber is rear-earth-doped quartzy active photonic crystal optical fibre, or the pure quartzy passive light of undoped
Photonic crystal fiber.
The present invention has advantages below：
1st, collapsed using carbon dioxide laser heating, the wavelength of carbon dioxide laser is 10.6 microns, is quartz glass
Absorption bands, can play good heat effect；More conventional oxyhydrogen flame and electric arc heated are compared, laser is used as a kind of cleaning
The energy and laser facula is controllable, it is to avoid the optical fiber surface that oxyhydrogen flame or the mode of other electrode discharges heating are brought is damaged and gold
Category impurity sputtering pollution；
2nd, collapsed using the heating of carbon dioxide laser Rotating with Uniform, can quickly and uniformly realize that inside and outside different size is empty
The uniform synchronization of pore is collapsed, so as to obtain smooth face of collapsing；Compare when electric arc heated is collapsed, because of large mode field PCF sky
The presence of air hole structure, causes the change of thermal conductivity, it may appear that inner air and outer air hole is collapsed nonsynchronous situation, LASER HEATING mode
Use, greatly improve such case；
3rd, M shape V-groove cover plates are designed and make, the flat presser feet of the centre of the M shape V-groove cover plates can be by described optical fiber
It is limited in the range of the triangle that flat presser feet is constituted with V-groove, it is to avoid shake occurs in rotary heating in optical fiber, causes air
Hole is collapsed uneven, and adapts to optical fiber various sizes of in external diameter.
4th, acquisition solid-state end cap of collapsing directly is carried out on photonic crystal fiber, using conventional optical fiber cutter and optical fiber
Abrasive disk can be completed to cut and processed, and can carry out angle cutting and polishing；
5th, method of operating is simple and practical, short preparation period, preparation cost are low.
Description of the drawings
Fig. 1 makes M shape V-groove cover plates and V-groove schematic diagram by oneself
1 be M shape V-groove cover plates, 2 be cover plate in the middle of flat presser feet, 3 be optical fiber, 4 be V-groove；
The schematic cross-section of Fig. 2 photonic crystal fibers；
The photonic crystal fiber of Fig. 3 basis of microscopic observation changes side view before and after collapsing；
A left side for before collapsing, it is right for after collapsing
The schematic diagram of optical fiber integration end cap in Fig. 4 embodiments 3.
Specific embodiment
With reference to example and accompanying drawing, the invention will be further described, but should not limit protection model of the invention with this
Enclose.
Embodiment 1：
(1) it is 40 microns, surrounding layer airport a diameter of 12 to take an external diameter for 400 microns, 200 microns of inner cladding, fibre core
Micron, the photonic crystal fiber of a diameter of 2 microns of inner cladding airport, first process optical fiber surface with analysis absolute alcohol, then by institute
The optical fiber stated is placed in standard fiber fixture, and the distance of the position that optical fiber is clamped to fiber end face is 10cm；
(2) described standard fiber fixture is placed in the fixture draw-in groove of optical fiber splicer, described optical fiber is placed in optical fiber
In two V-grooves of heat sealing machine, the distance between two V-grooves are set to 4cm；By homemade M shapes V-groove cover plate (such as Fig. 1 institutes
Show), depress along V-groove depression direction, the flat presser feet (such as 2 in Fig. 1) of the centre of described M shape V-groove cover plates will
Described optical fiber is limited in the range of the triangle that flat presser feet is constituted with V-groove；
(3) heat sealing machine parameter is set：Laser is 10.6 microns of carbon dioxide laser, and LASER HEATING power is 10W；Optical fiber
Rotary speed is 0.05 °/ms；Heat time is 9000ms；
(4) start heat sealing machine, launch laser, start timing, heating, rotation start simultaneously；Observation welding display screen, observation
Whether optical fiber rotates smoothly；If optical fiber is shaken, stop heating, cleaning V-groove and balance presser feet after repeat above step after
Continuous experiment；
(5) the heating setpoint time is reached, optical fiber is taken out and is placed in basis of microscopic observation measurement, areas transparent of collapsing is measured：
Zone length of collapsing is 500 microns；The length difference of adjacent two airport of region end face of collapsing is less than 10 microns；
(6) region of collapsing of successful optical fiber of collapsing is placed under large-diameter fibre-optical cutter, on demand by fiber cut
Angle is set to 0 °, and reservation is collapsed, and to hold the length of cap be 300 microns for the length in region, is then cut.
Embodiment 2：
(1) it is 40 microns, surrounding layer airport a diameter of 12 to take an external diameter for 400 microns, 200 microns of inner cladding, fibre core
Micron, the photonic crystal fiber of a diameter of 2 microns of inner cladding airport, first process optical fiber surface with analysis absolute alcohol, then by institute
The optical fiber stated is placed in standard fiber fixture, and the distance of the position that optical fiber is clamped to fiber end face is 10cm；
(2) described standard fiber fixture is placed in the fixture draw-in groove of optical fiber splicer, described optical fiber is placed in optical fiber
In two V-grooves of heat sealing machine, the distance between two V-grooves are set to 4cm；By homemade M shapes V-groove cover plate (such as Fig. 1 institutes
Show), depress along V-groove depression direction, the flat presser feet (such as 2 in Fig. 1) of the centre of described M shape V-groove cover plates will
Described optical fiber is limited in the range of the triangle that flat presser feet is constituted with V-groove；
(3) heat sealing machine parameter is set：Laser is 10.6 microns of carbon dioxide laser, and LASER HEATING power is 15W；Optical fiber
Rotary speed is 0.15 °/ms；Heat time is 20000ms；
(4) start heat sealing machine, launch laser, start timing, heating, rotation start simultaneously；Observation welding display screen, observation
Whether optical fiber rotates smoothly；If optical fiber is shaken, stop heating, cleaning V-groove and balance presser feet after repeat above step after
Continuous experiment；
(5) the heating setpoint time is reached, optical fiber is taken out and is placed in basis of microscopic observation measurement, areas transparent of collapsing is measured：
Zone length of collapsing is 1000 microns；The length difference of adjacent two airport of region end face of collapsing is less than 10 microns；
(6) 6) region of collapsing of successful optical fiber of collapsing is placed under large-diameter fibre-optical cutter, on demand cuts optical fiber
Chamfer degree is set to 8 °, and reservation is collapsed, and to hold the length of cap be 40 microns for the length in region, is then cut.
Embodiment 3：
(1) it is 110 microns, surrounding layer airport a diameter of 15 to take an external diameter for 570 microns, 430 microns of inner cladding, fibre core
Micron, the photonic crystal fiber of a diameter of 3 microns of inner cladding airport, first process optical fiber surface with analysis absolute alcohol, then by institute
The optical fiber stated is placed in standard fiber fixture, and the distance of the position that optical fiber is clamped to fiber end face is 10cm；
(2) described standard fiber fixture is placed in the fixture draw-in groove of optical fiber splicer, described optical fiber is placed in optical fiber
In two V-grooves of heat sealing machine, the distance between two V-grooves are set to 4cm；By homemade M shapes V-groove cover plate (such as Fig. 1 institutes
Show), depress along V-groove depression direction, the flat presser feet (such as 2 in Fig. 1) of the centre of described M shape V-groove cover plates will
Described optical fiber is limited in the range of the triangle that flat presser feet is constituted with V-groove；
(3) heat sealing machine parameter is set：Laser is 10.6 microns of carbon dioxide laser, and LASER HEATING power is 20W；Optical fiber
Rotary speed is 0.1 °/ms；Heat time is 10000ms；
(4) start heat sealing machine, launch laser, start timing, heating, rotation start simultaneously；Observation welding display screen, observation
Whether optical fiber rotates smoothly；If optical fiber is shaken, stop heating, cleaning V-groove and balance presser feet after repeat above step after
Continuous experiment；
(5) the heating setpoint time is reached, optical fiber is taken out and is placed in basis of microscopic observation measurement, areas transparent of collapsing is measured：
Zone length of collapsing is 800 microns；The length difference of adjacent two airport of region end face of collapsing is less than 10 microns；
(6) region of collapsing of successful optical fiber of collapsing is placed under large-diameter fibre-optical cutter, on demand by fiber cut
Angle is set to 0 °, and reservation is collapsed, and to hold the length of cap be 100 microns for the length in region, is then cut.
As a result it is as shown in Figure 4.
Embodiment 4：
(1) it is 120 microns, surrounding layer airport a diameter of 16 to take an external diameter for 600 microns, 450 microns of inner cladding, fibre core
Micron, the photonic crystal fiber of a diameter of 3 microns of inner cladding airport, first process optical fiber surface with analysis absolute alcohol, then by institute
The optical fiber stated is placed in standard fiber fixture, and the distance of the position that optical fiber is clamped to fiber end face is 10cm；
(2) described standard fiber fixture is placed in the fixture draw-in groove of optical fiber splicer, described optical fiber is placed in optical fiber
In two V-grooves of heat sealing machine, the distance between two V-grooves are set to 4cm；By homemade M shapes V-groove cover plate (such as Fig. 1 institutes
Show), depress along V-groove depression direction, the flat presser feet (such as 2 in Fig. 1) of the centre of described M shape V-groove cover plates will
Described optical fiber is limited in the range of the triangle that flat presser feet is constituted with V-groove；
(3) heat sealing machine parameter is set：Laser is 10.6 microns of carbon dioxide laser, and LASER HEATING power is 20W；Optical fiber
Rotary speed is 0.1 °/ms；Heat time is 15000ms；
(4) start heat sealing machine, launch laser, start timing, heating, rotation start simultaneously；Observation welding display screen, observation
Whether optical fiber rotates smoothly；If optical fiber is shaken, stop heating, cleaning V-groove and balance presser feet after repeat above step after
Continuous experiment；
(5) the heating setpoint time is reached, optical fiber is taken out and is placed in basis of microscopic observation measurement, areas transparent of collapsing is measured：
Zone length of collapsing is 900 microns；The length difference of adjacent two airport of region end face of collapsing is less than 10 microns；
(6) region of collapsing of successful optical fiber of collapsing is placed under large-diameter fibre-optical cutter, on demand by fiber cut
Angle is set to 0 °, and reservation is collapsed, and to hold the length of cap be 200 microns for the length in region, is then cut.
Experiment shows that the optical fiber faced when present invention, avoiding external quartz glass end cap with photon crystal optical fiber fusion splicing is cut
The face out-of-flatness of cutting off causes the not enough problem of heat seal strength, can directly collapse on original photonic crystal fiber and obtain seamless company
The end cap for connecing, is easy to subsequent treatment application, while not affecting the laser activity of optical fiber.
Claims (2)
1. the preparation method of a kind of photonic crystal fiber integration end cap, it is characterised in that the method comprises the following steps：
1) photonic crystal fiber that an external diameter is 400-600 microns is taken, first optical fiber surface is processed with analysis absolute alcohol, then will be described
Optical fiber be placed in standard fiber fixture, optical fiber clamping position to fiber end face distance be 10cm；
2) described standard fiber fixture is placed in the fixture draw-in groove of optical fiber splicer, described optical fiber is placed in optical fiber splicer
Two V-grooves in, the distance between two V-grooves are set to 4cm；By homemade M shapes V-groove cover plate, along V-groove depression side
To depressing, described optical fiber is limited in flat presser feet and V-type by the flat presser feet of the centre of described M shape V-groove cover plates
In the range of the little triangle of groove composition；
3) heat sealing machine parameter is set：Laser is 10.6 microns of carbon dioxide laser, and LASER HEATING power is 10W-20W；Optical fiber
Rotary speed is 0.05-0.15 °/ms；Heat time is 9000-20000ms；
4) start heat sealing machine, launch laser, start timing, heating, rotation start simultaneously；Observation welding display screen, observes optical fiber
Whether rotate smoothly；If optical fiber is shaken, stop heating, after cleaning V-groove and balance presser feet, repeat above step and continue real
Test；
5) the heating setpoint time is reached, optical fiber is taken out and is placed in basis of microscopic observation measurement, areas transparent of collapsing, zone length of collapsing
For 500-1000 microns；The length difference of adjacent two airport of region end face of collapsing is less than 10 microns；
6) region of collapsing of successful optical fiber of collapsing is placed under large-diameter fibre-optical cutter, on demand sets fiber cut angle
It is set to 0-8 °, reservation is collapsed, and to hold the length of cap be 40-300 microns for the length in region, is then cut.
2. the preparation method of photonic crystal integration end cap according to claim 1, is characterized in that described photonic crystal
Optical fiber is rear-earth-doped quartzy active photonic crystal optical fibre, or the pure quartzy passive photonic crystal optical fiber of undoped.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020197014A1 (en) * | 2001-06-22 | 2002-12-26 | Micro Photonix Integration Corporation | Manufacture of polarization maintaining optical fiber coupler |
| CN103487901A (en) * | 2013-09-27 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | Optical fiber laser bundle combining device |
| CN103490273A (en) * | 2013-10-10 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical fiber transmission system |
| CN104808288A (en) * | 2015-04-14 | 2015-07-29 | 中国科学院上海光学精密机械研究所 | Efficient cooling large-mode-area mid-infrared photonic crystal optical fiber and laser device thereof |
| US20160109656A1 (en) * | 2014-10-17 | 2016-04-21 | Lumentum Operations Llc | High power misalignment-tolerant fiber assembly |
| CN105929482A (en) * | 2016-06-24 | 2016-09-07 | 中国工程物理研究院激光聚变研究中心 | Fiber end cap and manufacturing method thereof |
-
2017
- 2017-01-03 CN CN201710000718.4A patent/CN106646747B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020197014A1 (en) * | 2001-06-22 | 2002-12-26 | Micro Photonix Integration Corporation | Manufacture of polarization maintaining optical fiber coupler |
| CN103487901A (en) * | 2013-09-27 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | Optical fiber laser bundle combining device |
| CN103490273A (en) * | 2013-10-10 | 2014-01-01 | 武汉锐科光纤激光器技术有限责任公司 | High-power optical fiber transmission system |
| US20160109656A1 (en) * | 2014-10-17 | 2016-04-21 | Lumentum Operations Llc | High power misalignment-tolerant fiber assembly |
| CN104808288A (en) * | 2015-04-14 | 2015-07-29 | 中国科学院上海光学精密机械研究所 | Efficient cooling large-mode-area mid-infrared photonic crystal optical fiber and laser device thereof |
| CN105929482A (en) * | 2016-06-24 | 2016-09-07 | 中国工程物理研究院激光聚变研究中心 | Fiber end cap and manufacturing method thereof |
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