CN112612081A - Optical fiber fusion splicing method - Google Patents
Optical fiber fusion splicing method Download PDFInfo
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- CN112612081A CN112612081A CN202011559405.0A CN202011559405A CN112612081A CN 112612081 A CN112612081 A CN 112612081A CN 202011559405 A CN202011559405 A CN 202011559405A CN 112612081 A CN112612081 A CN 112612081A
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- fiber
- fusion splicing
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 234
- 238000007526 fusion splicing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000003466 welding Methods 0.000 claims abstract description 46
- 230000003287 optical effect Effects 0.000 claims abstract description 33
- 239000011247 coating layer Substances 0.000 claims description 17
- 238000005253 cladding Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 abstract description 34
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 208000028659 discharge Diseases 0.000 description 30
- 238000010891 electric arc Methods 0.000 description 7
- 230000004927 fusion Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007499 fusion processing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- 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
Abstract
The invention provides an optical fiber fusion splicing method, which comprises the following steps: aligning a first optical fiber and a second optical fiber, and welding an end face of the first optical fiber and an end face of the second optical fiber through arc first discharge; and moving the second optical fiber, and changing the optical channel and the core diameter of the first optical fiber through arc second discharge so as to enable the optical channel of the first optical fiber to be matched with the optical channel of the second optical fiber, wherein the core diameter of the first optical fiber is matched with the core diameter of the second optical fiber. The optical fiber welding method provided by the invention adds the follow-up discharge, namely after the welding is finished, the optical fiber welding system discharges a section of optical fiber with a smaller fiber core again, the core diameter of the fiber core is properly enlarged, and the optical channel of the pump light is widened, so that the optical channel can be better matched with the fiber core with a larger welding size, thereby achieving the effect of reducing the welding error and reducing the problem of high optical temperature of a leaky coating caused by welding deviation.
Description
Technical Field
The invention relates to the technical field of optical fiber cables, in particular to an optical fiber fusion splicing method.
Background
During the production of conventional pulsed fiber lasers, 20/250 passive fiber and 30/250 doped active fiber are often fused. Because the sizes of the fiber cores of the two optical fibers are different and the doping concentration media of the fiber cores of the two optical fibers are different, if a conventional common welding mode is adopted, namely the two optical fibers are directly welded together, the loss of a welding point is inevitably large; and the welding point is easy to leak light to the cladding, so that the temperature of the glue dispensing surface of the cladding is high, the time is long, the heat is accumulated on the glue layer, the glue layer is easy to burn out, and the welding quality of the pulse optical fiber laser is reduced.
Disclosure of Invention
The invention provides an optical fiber fusion splicing method which is used for solving the problem of poor fusion splicing quality between optical fibers with different core diameters and/or different geometric structures in the prior art.
The invention provides an optical fiber fusion splicing method, which comprises the following steps:
aligning a first optical fiber and a second optical fiber, and welding an end face of the first optical fiber and an end face of the second optical fiber through arc first discharge;
and moving the second optical fiber, and changing the optical channel and the core diameter of the first optical fiber through arc second discharge so as to enable the optical channel of the first optical fiber to be matched with the optical channel of the second optical fiber, wherein the core diameter of the first optical fiber is matched with the core diameter of the second optical fiber.
According to the optical fiber fusion splicing method provided by the invention, before the aligning the first optical fiber and the second optical fiber, the method further comprises the following steps:
and stripping the coating layer of the first optical fiber and the coating layer of the second optical fiber.
According to the optical fiber fusion splicing method provided by the invention, after the peeling off the coating layer of the first optical fiber and the coating layer of the second optical fiber, before the aligning the first optical fiber and the second optical fiber, the method further comprises the following steps:
cutting the part of the first optical fiber, from which the coating layer is removed, so that the end face of the first optical fiber is flat; and cutting the part of the second optical fiber, from which the coating layer is removed, so that the end face of the second optical fiber is flat.
According to the optical fiber fusion splicing method provided by the invention, the aligning of the first optical fiber and the second optical fiber is specifically as follows:
an end face of a core of the first optical fiber is aligned with an end face of a core of the second optical fiber, and an end face of a cladding of the first optical fiber is aligned with an end face of a cladding of the second optical fiber.
According to an optical fiber fusion splicing method provided by the present invention, fusion splicing the end face of the first optical fiber and the end face of the second optical fiber by arc first discharge includes:
the fusion-splicing speed of the end face of the first optical fiber and the end face of the second optical fiber is 0.75 mm/ms.
According to the optical fiber fusion splicing method provided by the invention, the fusion splicing length of the end face of the first optical fiber and the end face of the second optical fiber is 10 um.
According to the optical fiber fusion splicing method provided by the invention, the first discharge time of the electric arc is 0-1000 ms.
According to the optical fiber fusion splicing method provided by the invention, the moving of the second optical fiber specifically comprises:
the second optical fiber moves in a direction away from the first optical fiber under the driving of a second motor, and a first motor corresponding to the first optical fiber is in a stop state.
According to the optical fiber fusion splicing method provided by the invention, the intensity of the second discharge of the electric arc is 14000-16000 units.
According to the optical fiber fusion splicing method provided by the invention, the first optical fiber is 20/250 passive optical fiber, and the second optical fiber is 30/250 doped active optical fiber.
According to the optical fiber fusion splicing method provided by the invention, after the end face of the first optical fiber and the end face of the second optical fiber are fused through the first discharge of the electric arc, the optical channel and the core diameter of the first optical fiber are changed through the second discharge of the electric arc. After the conventional welding is finished, a step is added to enable the optical fiber to continuously discharge at one end of the fiber core with the smaller size, the optical channel is expanded to enable the optical channel to be more attached to the optical channel of the fiber core with the larger size, so that the signal laser passing through the fiber core has less loss at the welding point, the temperature of the welding point can be reduced, and the maximum signal transmission and the optimal light beam quality are realized. The optical fiber welding method provided by the invention adds the follow-up discharge, namely after the welding is finished, the optical fiber welding system discharges a section of optical fiber with a smaller fiber core again, the core diameter of the fiber core is properly enlarged, and the optical channel of the pump light is widened, so that the optical channel can be better matched with the fiber core with a larger welding size, thereby achieving the effect of reducing the welding error and reducing the problem of high optical temperature of a leaky coating caused by welding deviation.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method of fusion splicing optical fibers according to the present invention;
FIG. 2 is a schematic diagram of a fiber fusion splicing system according to the present invention;
reference numerals:
101: a first optical fiber; 102: a second optical fiber; 103: a first motor;
104: a second motor; 105: a first V-shaped groove; 106: a second V-shaped groove;
107: a first electrode rod; 108: a second electrode rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The optical fiber fusion splicing method of the present invention will be described below with reference to fig. 1 to 2.
An optical fiber fusion splicing system used in the optical fiber fusion splicing method according to an embodiment of the present invention is described below, and as shown in fig. 2, the optical fiber fusion splicing system includes two first electrode rods 107 and a second electrode rod 108 which are symmetrically arranged, and an arc may be formed between the first electrode rods 107 and the second electrode rod 108. In the optical fiber fusion, two glass optical fibers are sintered together by high temperature generated by arc discharge (the fiber core end surfaces of the two are precisely butted).
The fiber fusion splicing system further comprises a first motor 103 for driving the first fiber 101 in motion and a second motor 104 for driving the second fiber 102 in motion, the first fiber 101 and the second fiber 102 being movable towards each other. The first optical fiber 101 is placed in the first V-groove 105, and the first optical fiber 101 is limited by the first V-groove 105; the second optical fiber 102 is placed in a second V-groove 106, and the second optical fiber 102 is retained by the second V-groove 106. The V-shaped groove is used for limiting the optical fiber along the length direction of the optical fiber.
Environmental requirements of the fusion process: first, the welding must be performed in a very clean environment to avoid dust or any other contaminants from affecting the welding process; second, the required ambient temperature for fusion bonding is 15 ℃ to 28 ℃.
As shown in fig. 1, the optical fiber fusion splicing method according to the embodiment of the present invention includes:
s10, aligning the first optical fiber 101 and the second optical fiber 102, and fusion-splicing the end face of the first optical fiber 101 and the end face of the second optical fiber 102 by arc first discharge;
wherein, before aligning the first optical fiber 101 and the second optical fiber 102, the method further comprises:
the coating of the first optical fiber 101 and the coating of the second optical fiber 102 are stripped.
Each fiber must be thoroughly cleaned prior to stripping and the coating removed to expose the appropriate length of bare fiber before the fiber is placed in the V-groove and finally cleaned with an appropriate wipe.
Further, after peeling off the coating layer of the first optical fiber 101 and the coating layer of the second optical fiber 102, before aligning the first optical fiber 101 and the second optical fiber 102, the method further includes:
cutting the part of the first optical fiber 101, from which the coating layer is removed, so that the end face of the first optical fiber 101 is flat; the portion of the second optical fiber 102 that has been stripped of coating is cut to flatten the end face of the second optical fiber 102.
In which a bare fiber is cut using a suitable cutter and cutting method so that the end surfaces of the first and second optical fibers 101 and 102 are completely attached.
S20, moving the second optical fiber 102, changing the optical path and the core diameter of the first optical fiber 101 by arc second discharge so that the optical path of the first optical fiber 101 is matched with the optical path of the second optical fiber 102, and the core diameter of the first optical fiber 101 is matched with the core diameter of the second optical fiber 102.
It should be noted that the optical fiber fusion splicing method is used for fusion splicing between optical fibers with different core diameters and/or different geometric structures. In the embodiment of the present invention, the first optical fiber 101 is 20/250 passive optical fiber, and the second optical fiber 102 is 30/250 doped active optical fiber.
In the embodiment of the present invention, after the fusion-splicing of the end face of the first optical fiber 101 and the end face of the second optical fiber 102 by the arc first discharge is completed, the optical path and the core diameter of the first optical fiber 101 are changed again by the arc second discharge. After the conventional welding is finished, a step is added to enable the optical fiber to continuously discharge at one end of the fiber core with the smaller size, the optical channel is expanded to enable the optical channel to be more attached to the optical channel of the fiber core with the larger size, so that the signal laser passing through the fiber core has less loss at the welding point, the temperature of the welding point can be reduced, and the maximum signal transmission and the optimal light beam quality are realized. The optical fiber welding method provided by the embodiment of the invention adds the follow-up discharge, namely after the welding is finished, the optical fiber welding system discharges a section of optical fiber with a smaller fiber core again, the core diameter of the fiber core is properly enlarged, and the optical channel of the pump light is widened, so that the optical channel can be better matched with the fiber core with a larger welding size, thereby achieving the effect of reducing the welding error and reducing the problem of high optical temperature of a leaky package layer caused by welding offset.
On the basis of the above embodiment, the alignment of the first optical fiber 101 and the second optical fiber 102 specifically includes:
the end face of the core of the first optical fiber 101 is aligned with the end face of the core of the second optical fiber 102, and the end face of the cladding of the first optical fiber 101 is aligned with the end face of the cladding of the second optical fiber 102.
The first optical fiber 101 is driven by the first motor 103 to move toward the second optical fiber 102, and the second optical fiber 102 is driven by the second motor 104 to move toward the first optical fiber 101. Wherein, the first optical fiber 101 and the second optical fiber 102 can move in two directions, so that the first optical fiber 101 and the second optical fiber 102 are precisely butted.
On the basis of the above-described embodiment, fusion-splicing the end face of the first optical fiber 101 and the end face of the second optical fiber 102 by arc primary discharge includes:
the fusion-splicing speed of the end face of the first optical fiber 101 and the end face of the second optical fiber 102 was set to 0.75 mm/ms.
The fusion-spliced length between the end surface of the first optical fiber 101 and the end surface of the second optical fiber 102 is 10 um. The primary main discharge power of the electric arc is 341bit, and the primary discharge time of the electric arc is 0-1000 ms. For example, the initial discharge time is 0ms, and the end discharge time is 1000 ms; the intensity of the second discharge of the arc ranges from 14000 unit to 16000unit, and the intensity of the second discharge of the arc can be 15000 unit.
On the basis of the above embodiment, the moving the second optical fiber 102 specifically includes:
the second optical fiber 102 is driven by the second motor 104 to move in a direction away from the first optical fiber 101, and the first motor 103 corresponding to the first optical fiber 101 is in a stopped state.
It should be noted that after the end face of the fiber core of the first optical fiber 101 and the end face of the fiber core of the second optical fiber 102 are welded together, the second motor 104 drives the second optical fiber 102 to move along the direction away from the first optical fiber 101, at this time, the welding point of the first optical fiber 101 and the second optical fiber 102 moves to the right, after the welding point moves to the right for a certain distance, the positions of the two electrode rods are fixed, at this time, the optical channel and the core diameter of the first optical fiber 101 are changed by the second discharge of the arc, so that the optical channel of the first optical fiber 101 is matched with the optical channel of the second optical fiber 102, and the core diameter of the first optical fiber 101 is matched with the core diameter of the second optical fiber 102.
The optical fiber fusion splicing method according to the embodiment of the present invention is explained below:
20/250 passive optical fibers are peeled off the coating layer and cut and then placed on the left side of the optical fiber fusion system, 30/250 doped active optical fibers are peeled off the coating layer and cut and then placed on the left side of the optical fiber fusion system;
firstly, adopting a conventional welding mode to perform discharge welding; wherein the cladding is aligned and the core is aligned;
after the welding is finished, the right motor shifts to the right, the electrode rod continues to discharge according to the accompanying discharge parameters, at the moment, one end of the 20/250 passive optical fiber on the left side is obviously discharged and expanded, and the core diameter and the optical channel of the fiber core are expanded to be matched with the right 30/250 doped active optical fiber;
after the following discharge welding is completed, resetting the optical fiber welding system for imaging;
and continuously testing the welding loss, and judging whether welding is qualified.
The optical fiber welding method provided by the embodiment of the invention can be used on a small optical fiber welding system which is used conventionally, and can solve the welding error and loss caused by the geometric dimension and structure of the optical fiber by starting a self-contained follow-up discharge welding mode.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of fusion splicing optical fibers, comprising:
aligning a first optical fiber and a second optical fiber, and welding an end face of the first optical fiber and an end face of the second optical fiber through arc first discharge;
and moving the second optical fiber, and changing the optical channel and the core diameter of the first optical fiber through arc second discharge so as to enable the optical channel of the first optical fiber to be matched with the optical channel of the second optical fiber, wherein the core diameter of the first optical fiber is matched with the core diameter of the second optical fiber.
2. The method for fusion splicing optical fibers according to claim 1, further comprising, before said aligning the first optical fiber and the second optical fiber:
and stripping the coating layer of the first optical fiber and the coating layer of the second optical fiber.
3. The method for fusion splicing optical fibers according to claim 2, further comprising, after the peeling off the coating layer of the first optical fiber and the coating layer of the second optical fiber, before the aligning the first optical fiber and the second optical fiber:
cutting the part of the first optical fiber, from which the coating layer is removed, so that the end face of the first optical fiber is flat; and cutting the part of the second optical fiber, from which the coating layer is removed, so that the end face of the second optical fiber is flat.
4. The method for fusion splicing optical fibers according to any one of claims 1 to 3, wherein the aligning the first optical fiber and the second optical fiber is performed by:
an end face of a core of the first optical fiber is aligned with an end face of a core of the second optical fiber, and an end face of a cladding of the first optical fiber is aligned with an end face of a cladding of the second optical fiber.
5. The optical fiber fusion splicing method according to any one of claims 1 to 3, wherein the fusion splicing of the end face of the first optical fiber and the end face of the second optical fiber by arc first discharge includes:
the fusion-splicing speed of the end face of the first optical fiber and the end face of the second optical fiber is 0.75 mm/ms.
6. The optical fiber fusion splicing method according to claim 5, wherein the fusion splicing length of the end face of the first optical fiber and the end face of the second optical fiber is 10 μm.
7. The method for fusion splicing optical fibers according to claim 6, wherein the time for the first discharge of the arc is 0 to 1000 ms.
8. The method for fusion splicing optical fibers according to any one of claims 1 to 3, wherein said moving said second optical fiber is in particular:
the second optical fiber moves in a direction away from the first optical fiber under the driving of a second motor, and a first motor corresponding to the first optical fiber is in a stop state.
9. The method for fusion splicing optical fibers according to any one of claims 1 to 3, wherein the intensity of the second discharge of the arc is 14000 to 16000 units.
10. The method for fusion splicing optical fibers according to any one of claims 1 to 3, wherein the first optical fiber is 20/250 passive optical fiber and the second optical fiber is 30/250 doped active optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011559405.0A CN112612081A (en) | 2020-12-25 | 2020-12-25 | Optical fiber fusion splicing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011559405.0A CN112612081A (en) | 2020-12-25 | 2020-12-25 | Optical fiber fusion splicing method |
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| CN112612081A true CN112612081A (en) | 2021-04-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05215931A (en) * | 1992-01-31 | 1993-08-27 | Furukawa Electric Co Ltd:The | Fusion splicing method for optical fiber |
| CN1399150A (en) * | 2001-06-06 | 2003-02-26 | 株式会社藤倉 | Optical fiber welding machine and welding method |
| CN106324756A (en) * | 2016-11-18 | 2017-01-11 | 中国联合网络通信集团有限公司 | Optical fiber splicing method and device |
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2020
- 2020-12-25 CN CN202011559405.0A patent/CN112612081A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05215931A (en) * | 1992-01-31 | 1993-08-27 | Furukawa Electric Co Ltd:The | Fusion splicing method for optical fiber |
| CN1399150A (en) * | 2001-06-06 | 2003-02-26 | 株式会社藤倉 | Optical fiber welding machine and welding method |
| CN106324756A (en) * | 2016-11-18 | 2017-01-11 | 中国联合网络通信集团有限公司 | Optical fiber splicing method and device |
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Application publication date: 20210406 |