CN114879314A - Optical fiber and connection method - Google Patents
Optical fiber and connection method Download PDFInfo
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- CN114879314A CN114879314A CN202210536944.5A CN202210536944A CN114879314A CN 114879314 A CN114879314 A CN 114879314A CN 202210536944 A CN202210536944 A CN 202210536944A CN 114879314 A CN114879314 A CN 114879314A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 158
- 230000000149 penetrating effect Effects 0.000 claims abstract description 29
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 238000003672 processing method Methods 0.000 claims description 15
- 210000001503 joint Anatomy 0.000 claims description 7
- 239000003550 marker Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000003786 synthesis reaction Methods 0.000 claims description 6
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- 238000000227 grinding Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000003292 glue Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
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- 230000013011 mating Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000000576 coating method Methods 0.000 description 1
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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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
- G02B6/3885—Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type
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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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
The invention provides an optical fiber and a connecting method, comprising a first ferrule, a second ferrule, an optical fiber fixing part, a sleeve, a multi-core optical fiber and a matching bridge optical fiber; a space for penetrating the multi-core optical fiber is arranged in the first ferrule, a space for accommodating the optical fiber fixing device is arranged in the second ferrule, a plurality of pore channels for penetrating the matching bridge optical fiber are arranged in the optical fiber fixing device, and the first ferrule and the second ferrule are coaxially inserted into two ends of the sleeve respectively; the number of the matching bridge fibers penetrating into the optical fiber fixing device is the same as and corresponds to the number of the multi-core optical fiber cores penetrating into the first inserting core, and any pair of matching bridge fibers and the multi-core optical fiber cores are butted at one end, opposite to the first inserting core and the second inserting core. The spatial arrangement of the pore passage of the optical fiber fixing device is the same as that of the multi-core optical fiber core, and the first inserting core and the second inserting core are coaxially connected through the sleeve, so that the multi-core optical fiber and a plurality of matching bridge fibers are in contact connection, the processing is convenient, the size is small, the performance is good, and the industrial production can be realized.
Description
Technical Field
The invention relates to the field of optical communication sensing, in particular to an optical fiber and a connection method.
Background
The rapid development of modern communication systems poses significant challenges to the information transfer capacity. The multi-core optical fiber has a plurality of fiber cores which can be used as channels for information transmission, and has the advantages of high integration level, large transmission capacity and the like, and can be widely applied to the fields of data centers, temperature and pressure sensing and the like.
When the optical fiber loop is applied to the sensing field, the multi-core optical fiber can form a loop by connecting the cores, so that the length of the single-core optical fiber and the laying difficulty of the optical fiber loop are greatly reduced. In practical applications, the fan-in and fan-out devices of the multi-core optical fiber must not be few, that is, the fan-in device and the fan-out device are included. But at present, the mass production of the device is not mature enough, and the volume of the device at the fan-in end and the fan-out end is slightly larger.
The existing Chinese patent with publication number CN104678496B discloses a method for manufacturing a multi-core optical fiber fan-out connector based on a self-assembly principle; the method reduces the diameter of the single-mode optical fiber with the same number as the fiber core of the multi-core optical fiber by adopting a mechanical processing or hydrofluoric acid optical fiber corrosion treatment mode, the single-mode optical fiber with the reduced diameter passes through a thin tube with an inner cone angle, the lower end of the thin tube is immersed in low-viscosity ultraviolet glue, and self-assembly is carried out by utilizing the capillary phenomenon to form the most compact honeycomb structure. The method uses hydrofluoric acid to carry out corrosion treatment on the optical fiber, has high requirements on production equipment, and the crosstalk of the prepared device is large.
Chinese prior publication No. CN111965757A discloses a fan-in fan-out beam splitter based on collimated light beam direct alignment coupling of multi-core optical fibers. The optical fiber consists of a multi-core optical fiber, a multi-core optical fiber thermal diffusion section, a graded-index large-core-diameter multi-core optical fiber with ground fiber ends, a self-focusing lens and a single-mode optical fiber. The method is characterized in that a micro lens is used, the micro distance between different cores of the multi-core optical fiber is amplified to a space to obtain a larger distance, and then light beams are coupled into the single-mode optical fiber through the lens. The method has high precision requirement on the process, and is difficult to realize when the number of fiber cores of the multi-core optical fiber is increased.
The inventor thinks that a small-sized multi-core optical fiber with good performance, which can replace a fan-in end or a fan-out end connecting device and can realize industrialization is urgently needed in the market at present.
Disclosure of Invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide an optical fiber and a method of connection.
The optical fiber provided by the invention comprises a first ferrule, a second ferrule, an optical fiber fixing part, a sleeve, a multi-core optical fiber and a matching bridge fiber; a space for penetrating a multi-core optical fiber is arranged in the first ferrule, a space for accommodating an optical fiber fixing device is arranged in the second ferrule, a plurality of pore channels for penetrating a matching bridge fiber are arranged in the optical fiber fixing device, and the first ferrule and the second ferrule are coaxially inserted into two ends of the sleeve respectively; the number of the matching bridge fibers penetrating into the optical fiber fixing device is the same as that of the multi-core optical fiber cores penetrating into the first inserting core, the matching bridge fibers and the multi-core optical fiber cores are in one-to-one correspondence, and any pair of the matching bridge fibers and the multi-core optical fiber cores are in butt joint at one end, opposite to the first inserting core and the second inserting core.
Preferably, the outer surface of the first ferrule is provided with a first mark zone, and the position of the first mark zone corresponds to the position of one fiber core of the multi-core optical fiber; the outer surface of the second ferrule is provided with a second mark area, and the position of the second mark area corresponds to the position of a matched bridge fiber; the first and second flag regions are aligned collinearly after both the first and second ferrules are mounted in place within the sleeve.
Preferably, the optical fiber fixing device is coaxially arranged at one end of the second ferrule far away from the first ferrule, a duct in the optical fiber fixing device allows a matching bridge fiber to penetrate through, and the spatial layout of the duct in the optical fiber fixing device corresponds to the spatial layout of the cores of the multicore optical fiber.
Preferably, the multicore fibers coaxially penetrate into the first ferrule, the matching bridge fibers coaxially penetrate into the second ferrule and the fiber fixing device, and the first ferrule and the second ferrule are both coaxially inserted into the sleeve.
Preferably, the first ferrule and the second ferrule both comprise a ferrule of ceramic or metal, the first ferrule has an outer diameter dimension equal to that of the second ferrule, and the sleeve has inner diameter dimensions at both ends.
Preferably, the length of the sleeve is less than the sum of the lengths of the first ferrule and the second ferrule, and the sleeve is provided with an opening parallel to the central axis of the sleeve.
According to the connecting method of the optical fiber provided by the invention, the connecting method comprises a multi-core optical fiber processing method, a matching bridge fiber processing method and a synthesis processing method; the multi-core optical fiber processing method comprises the following steps: s1.1, penetrating the multi-core optical fiber into a first ferrule, and fixedly connecting the multi-core optical fiber with the first ferrule; the matching bridge fiber processing method comprises the following steps: s2.1, tapering two ends of the plurality of matched bridge fibers respectively; s2.2, respectively penetrating two ends of the tapered matching bridge fibers into an optical fiber fixing device of a second ferrule, and fixedly connecting the tapered ends of the matching bridge fibers with the second ferrule; the synthesis treatment method comprises the following steps: and S3.1, coaxially inserting the first inserting core and the second inserting core into two ends of the sleeve respectively, and rotating the first inserting core and/or the second inserting core to enable the fiber cores of the multi-core optical fiber to be in one-to-one butt joint with the tapered ends of the multiple matched bridge fibers.
Preferably, in step S1.1, the multicore fiber coaxially penetrates into and out of the first ferrule, and the multicore fiber is rotated under a microscope so that the first mark region is aligned with one of the cores of the multicore fiber, and then one end of the multicore fiber penetrating out of the first ferrule is cut along the end face of the first ferrule, and then ground and polished.
Preferably, in step S2.2, two tapered ends of the multiple matching bridge fibers are inserted into the duct of the optical fiber fixing device, the multiple matching bridge fibers are cut along the end face of the second ferrule after penetrating out of the tapered ends of the second ferrule, and then the two tapered ends are ground and polished.
Preferably, for step 3.1, the first ferrule and the second ferrule are coaxially inserted into two ends of the sleeve respectively, and the end face of the multi-core fiber is contacted with the end faces of the multiple matching bridge fibers, and then the first ferrule and/or the second ferrule are rotated, so that the first marker zone and the second marker zone are aligned collinearly.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the multi-core optical fiber is coaxially inserted into the first insertion core, the tapered ends of the multiple matching bridge fibers are coaxially inserted into the pore channel of the optical fiber fixing device in the second insertion core, the spatial arrangement of the pore channel of the optical fiber fixing device is the same as the spatial arrangement of the fiber core of the multi-core optical fiber, and the first insertion core and the second insertion core are coaxially connected through the sleeve, so that the contact connection of the multi-core optical fiber and the multiple matching bridge fibers is realized, the processing is convenient, the volume is small, the performance is good, and the industrial production can be realized.
2. According to the invention, the first mark area on the outer surface of the first ferrule is matched with the second mark area on the outer surface of the second ferrule, so that the convenience of aligning the fiber core of the multi-core optical fiber with the tapered ends of a plurality of matching bridge fibers is improved.
3. According to the invention, the spatial layout of the multi-core fiber and the plurality of matching bridge fibers is set to be the same, and the multi-core fiber and the plurality of matching bridge fibers can be butted one by one in at least one direction by relatively rotating the first inserting core and the second inserting core, so that the convenience in installation of the multi-core fiber and the plurality of matching bridge fibers is improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of the overall structure of an optical fiber embodying the present invention;
FIG. 2 is a schematic cross-sectional view of a multi-core optical fiber connection structure according to the present invention;
FIG. 3 is a schematic view of a first ferrule structure with a multi-core fiber inserted therein according to the present invention;
FIG. 4 is a schematic structural view of a matched bridge fiber after tapering in accordance with the present invention;
FIG. 5 is a schematic view of a fiber holding device according to the present invention;
FIG. 6 is a schematic side view of a fiber fixing device for inserting a matching bridge fiber according to the present invention;
FIG. 7 is a schematic diagram of a side structure of a second ferrule through which a matching bridge fiber penetrates according to the present invention;
fig. 8 is a structural view of an end face of a matching bridge fiber array corresponding to a seven-core optical fiber according to the main embodiment of the present invention;
fig. 9 is a structural view of an end face of a matching bridge fiber array corresponding to a four-core optical fiber in the main embodiment of the present invention;
fig. 10 is a structural view of an end face of a matched bridge fiber array corresponding to an eight-core optical fiber according to a variation of the present invention 2.
Shown in the figure:
the first ferrule 1 matches the bridge fiber 5
First marking zone 7 of sleeve 3
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
As shown in fig. 1, an optical fiber according to the present invention includes a first ferrule 1, a second ferrule 2, an optical fiber fixing device 6, and a sleeve 3.
As shown in fig. 2, a space for penetrating the multi-core fiber 4 is integrally formed in the first ferrule 1, a space for accommodating the fiber fixing device 6 is integrally formed in the second ferrule 2, and a plurality of holes for penetrating the tapered end of the matching bridge fiber 5 are integrally formed in the fiber fixing device 6. The multi-core fiber 4 coaxially penetrates into the first ferrule 1, and the first ferrule 1 tightly binds the multi-core fiber 4. A plurality of matching bridge fibers 5 coaxially penetrate into a pore channel of the optical fiber fixing device 6 after fusion tapering, and the second inserting core 2 tightly restrains the tapering part of the matching bridge fibers 5.
As shown in fig. 3, 4, 5 and 6, further, the optical fiber fixing device 6 is coaxially and tightly installed at an end of the second ferrule 2 far away from the first ferrule 1, and a hole in the optical fiber fixing device 6 can allow a tapered end of a matching bridge fiber 5 to penetrate. The number of the matching bridge fibers 5 penetrating into the optical fiber fixing device 6 is the same as the number of the cores of the multi-core optical fiber 4 penetrating into the first ferrule 1, and the spatial layout of the channels in the optical fiber fixing device 6 corresponds to the spatial layout of the cores of the multi-core optical fiber 4. Any pair of matching bridge fiber 5 and multi-core fiber 4 fiber cores can be butted at one end opposite to the first ferrule 1 and the second ferrule 2.
As shown in fig. 1 and 2, specifically, the first ferrule 1 and the second ferrule 2 are coaxially inserted into both ends of the sleeve 3, respectively, and opposite ends of the first ferrule 1 and the second ferrule 2 each have an opening for butting the multicore fiber 4 and the plurality of matching bridge fibers 5. When the multi-core optical fiber is installed, the first ferrule 1 and the second ferrule 2 can rotate three hundred and sixty degrees relatively in the sleeve 3, and at least under one direction, the fiber cores of the multi-core optical fiber 4 and the plurality of matching bridge fibers 5 are in butt joint one by one.
Further, both the first ferrule 1 and the second ferrule 2 are ceramic ferrules, and the outer diameter dimension of the first ferrule 1 is equal to the outer diameter dimension of the second ferrule 2. An opening parallel to the central axis of the sleeve 3 is formed in the sleeve 3, and the inner diameters of two ends of the sleeve 3 are the same. When the fiber cores of the multi-core optical fiber 4 are in one-to-one butt joint with the plurality of matching bridge fibers 5, the end parts of the first ferrule 1 and the second ferrule 2 which are close to each other are abutted, and at the moment, the length of the sleeve 3 is smaller than the sum of the lengths of the first ferrule 1 and the second ferrule 2.
As shown in fig. 1 and 7, the outer surface of the first ferrule 1 is provided with a first marker 7, and the position of the first marker 7 corresponds to the position of one core of the multicore fiber 4. The outer surface of the second ferrule 2 is provided with a second mark zone 8, and the position of the second mark zone 8 corresponds to the position of a pore passage through which the bridge fiber 5 penetrates. After both the first ferrule 1 and the second ferrule 2 are mounted in place within the sleeve 3, the first index zone 7 and the second index zone 8 are aligned collinearly.
After the fiber cores of the multi-core optical fiber 4 and the plurality of matching bridge fibers 5 are butted one by one, the first ferrule 1 and the second ferrule 2 are respectively connected with the sleeve 3 by using glue dispensing, and the fiber cores of the multi-core optical fiber 4 and the plurality of matching bridge fibers 5 are fastened and connected.
The fixed connection of both the first 1 and the second ferrule 2 to the sleeve 3 can also be by means of mechanical fasteners.
Example two
As shown in fig. 1, based on embodiment 1, the connection method of the optical fiber provided by the present invention includes a multi-core optical fiber 4 processing method, a matching bridge fiber 5 processing method, and a synthesis processing method;
the multi-core optical fiber 4 processing method comprises the following steps:
s1.1, penetrating the multi-core fiber 4 into the first ferrule 1, and tightly connecting the multi-core fiber 4 with the first ferrule 1.
Specifically, in step S1.1, the multi-core fiber 4 coaxially penetrates into and out of the first ferrule 1, and the multi-core fiber 4 is rotated under a microscope to align the first mark region 7 with one of the cores of the multi-core fiber 4, and then one end of the multi-core fiber 4 penetrating out of the first ferrule 1 is cut along the end face of the first ferrule 1, and then ground and polished.
Further, the multi-core fiber 4 is fixedly connected with the first ferrule 1 through dispensing.
The processing method of the matching bridge fiber 5 comprises the following steps:
s2.1, tapering two ends of the plurality of matching bridge fibers 5 respectively.
S2.2, respectively penetrating two ends of the tapered matching bridge fibers 5 into the optical fiber fixing device 6 of the second ferrule 2, and tightly connecting the tapered ends of the matching bridge fibers 5 with the second ferrule 2.
Specifically, in step S2.2, two tapered ends of the multiple matching bridge fibers 5 are inserted into the hole channel of the optical fiber fixing device 6, the multiple matching bridge fibers 5 are cut along the end face of the second ferrule 2 after penetrating out of the tapered ends of the second ferrule 2, and then the two tapered ends are ground and polished.
Further, the matching bridge fibers 5 are fixedly connected with the second ferrule 2 through glue dispensing.
The synthesis treatment method comprises the following steps:
and S3.1, coaxially inserting the first ferrule 1 and the second ferrule 2 into two ends of the sleeve 3 respectively, and rotating the first ferrule 1 and/or the second ferrule 2 to enable fiber cores of the multi-core optical fiber 4 to be in one-to-one butt joint with the tapered ends of the multiple matching bridge fibers 5.
Specifically, the first ferrule 1 and the second ferrule 2 are coaxially inserted into both ends of the sleeve 3, respectively, and the end faces of the multicore fibers 4 and the end faces of the plurality of matching bridge fibers 5 are brought into contact, after which the first ferrule 1 and/or the second ferrule 2 are rotated so that the first index regions 7 and the second index regions 8 are aligned collinearly.
Example 3
According to the embodiment 1 and the embodiment 2, the multi-core fiber is taken as an example for explanation:
as shown in fig. 1, 2 and 3, the seven-core optical fiber has a core pitch of 41.5 μm, and the core is a standard single-mode optical fiber. For the treatment of the seven-core optical fiber, a section of the seven-core optical fiber with proper length is selected, a coating layer at one end of the seven-core optical fiber is stripped, and the seven-core optical fiber is wiped clean by alcohol. It is threaded into the first ferrule 1, against which the first ferrule 1 can be securely bound. And cutting the redundant penetrating part along the end surface of the first ferrule 1, and grinding and polishing the redundant penetrating part. Then, under a microscope, the fiber core needed by the seven-core optical fiber is rotated to the position consistent with the first mark area 7 on the outer surface of the first ferrule 1, and the glue is dispensed and fixed after the adjustment.
As shown in fig. 4, 5, 6, 7, and 8, the matching bridge fiber 5 has a multi-clad structure, the outermost cladding has a diameter of 125 μm, and the tapered inner cladding forms a core, which can effectively suppress crosstalk. Selecting a plurality of matching bridge fibers 5 with proper lengths, respectively stripping coating layers at positions close to two ends of the matching bridge fibers 5, wherein the length is about 2cm, and cleaning the matching bridge fibers with alcohol. One end of the optical fiber is placed on a tapering machine, a heating source of the tapering machine is aligned with the part for stripping the coating, and proper tapering parameters are selected, wherein the tapering speed is about 0.2mm/s, the power is about 515bits, and the rotating speed is about 60deg/s (the specific parameters are different according to factors such as the size material of the optical fiber). The outermost cladding of the tapered matched bridge fiber 5 was about 41.5 μm, and the tapered portion was cut near the midpoint using a cutting blade, and the same procedure was performed for the other end of the matched bridge fiber 5.
The outer surface of the second ferrule 2 is provided with a second mark zone 8, the inner diameter of the second ferrule 2 is 125 μm matched with the matching bridge fiber 5, and one end of the second ferrule 2 far away from the first ferrule 1 is provided with an optical fiber fixing device 6 with seven channels, the spatial arrangement of the seven channels of the device corresponds to the spatial arrangement of the fiber core at the end face of the seven-core optical fiber, and the channels can tightly bind the tapered end of the matching bridge fiber 5.
As shown in fig. 1, both ends of the mating bridge fiber 5 after tapering are passed along two other holes except for the middle hole of the optical fiber fixture 6, and the tapered end of the mating bridge fiber 5 is passed out of the optical fiber fixture 6. A plurality of mating bridge fibers 5 are passed through the fixture and through the second ferrule 2. The part which exceeds the second ferrule 2 is cut along the end face of the second ferrule 2 and is ground and polished, and the second mark zone 8 on the outer surface of the second ferrule 2 corresponds to a pore channel of the optical fiber fixing device 6, so that the optical fiber fixing device is conveniently butted with the first ferrule 1.
The first ferrule 1 and the second ferrule 2 adopted by the application are both ceramic ferrules and are connected and aligned through the sleeve 3. The outer diameter of the first ferrule 1 is the same as the outer diameter of the second ferrule 2, and the outer diameter of the first ferrule 1 is the same as the inner diameter of the sleeve 3. The first ferrule 1 and the second ferrule 2 coaxially penetrate into the sleeve 3, the end faces of the first ferrule 1 and the second ferrule 2 are contacted, the first ferrule 1 and the second ferrule 2 are rotated, the first mark region 7 and the second mark region 8 are aligned in a collinear mode, the alignment can be considered to be already achieved, and then glue dispensing fixing is conducted at the opening of the sleeve 3.
Modification example 1
According to embodiments 1, 2 and 3, the spatial layout of the tapered ends of the plurality of matching bridge fibers 5 and the spatial layout of the cores of the multi-core fiber 4 may be distributed in a matrix form.
As shown in fig. 9, the multi-core fiber 4 may also be a four-core fiber, in which case the fiber fixing device 6 has four holes corresponding to the spatial arrangement of the cores of the end face of the four-core fiber. This application is tapered to two matching bridge fiber 5's both ends to penetrate second lock pin 2 and optic fibre fixing device 6 in, later with first lock pin 1 and the butt joint of second lock pin 2 again, can obtain four core optical fibers.
According to the embodiments 1, 2 and 3, the spatial arrangement of the tapered ends of the plurality of matching bridge fibers 5 and the spatial arrangement of the cores of the multi-core fiber 4 can be uniformly distributed.
As shown in fig. 10, the multi-core optical fiber 4 may also be an eight-core optical fiber, where the optical fiber fixing device 6 has nine holes, the arrangement of the holes of the optical fiber fixing device 6 is a hole with a larger diameter at the center, the optical fiber penetrating through the hole plays a role of supporting, and the eight holes around the hole correspond to the spatial arrangement of the cores of the eight-core optical fiber.
Since eight cores are not stable structures, one fiber support is needed in the middle.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. An optical fiber is characterized by comprising a first ferrule (1), a second ferrule (2), an optical fiber fixing device (6), a sleeve (3), a multi-core optical fiber (4) and a matching bridge fiber (5);
a space for penetrating a multi-core optical fiber (4) is arranged in the first ferrule (1), a space for accommodating an optical fiber fixing device (6) is arranged in the second ferrule (2), a plurality of pore channels for penetrating a matching bridge fiber (5) are arranged in the optical fiber fixing device (6), and the first ferrule (1) and the second ferrule (2) are coaxially inserted into two ends of the sleeve (3) respectively;
the number of the matching bridge fibers (5) penetrating into the optical fiber fixing device (6) is the same as that of the fiber cores of the multi-core fibers (4) penetrating into the first ferrule (1) and corresponds to the fiber cores one by one, and any pair of the matching bridge fibers (5) and the fiber cores of the multi-core fibers (4) are butted at one ends, opposite to the first ferrule (1) and the second ferrule (2).
2. The optical fiber according to claim 1, wherein the outer surface of the first ferrule (1) is provided with a first marker zone (7), the position of the first marker zone (7) corresponding to the position of one core of the multicore fiber (4);
the outer surface of the second ferrule (2) is provided with a second mark area (8), and the position of the second mark area (8) corresponds to the position of a hole passage through which the bridge fiber (5) penetrates;
after the first ferrule (1) and the second ferrule (2) are installed in place in the sleeve (3), the first marking area (7) and the second marking area (8) are aligned collinearly.
3. Optical fiber according to claim 1, characterized in that the fiber fixation means (6) is arranged coaxially at the end of the second ferrule (2) remote from the first ferrule (1), that a passage in the fiber fixation means (6) allows a matching bridge fiber (5) to pass through, and that the spatial arrangement of the passages in the fiber fixation means (6) corresponds to the spatial arrangement of the cores of the multicore fiber (4).
4. The optical fiber according to claim 1, wherein the multicore fiber (4) is coaxially threaded into a first ferrule (1), a plurality of the matching bridge fibers (5) are coaxially threaded into a second ferrule (2) and a fiber fixture (6), and both the first ferrule (1) and the second ferrule (2) are coaxially inserted into a sleeve (3).
5. The optical fiber according to claim 1, wherein both the first ferrule (1) and the second ferrule (2) comprise a ceramic ferrule or a metal ferrule, the outer diameter dimension of the first ferrule (1) is equal to the outer diameter dimension of the second ferrule (2), and the inner diameter dimensions of both ends of the sleeve (3) are equal.
6. Optical fiber according to claim 1, wherein the length of the sleeve (3) is smaller than the sum of the lengths of the first (1) and second (2) ferrules, and wherein the sleeve (3) is provided with an opening parallel to the central axis of the sleeve (3).
7. A method for connecting optical fibers, characterized in that the optical fibers of any one of claims 1 to 6 are used, and the connecting method comprises a multi-core optical fiber (4) processing method, a matching bridge fiber (5) processing method and a synthesis processing method;
the processing method of the multi-core optical fiber (4) comprises the following steps:
s1.1, penetrating the multi-core optical fiber (4) into a first ferrule (1), and fixedly connecting the multi-core optical fiber (4) with the first ferrule (1);
the processing method of the matching bridge fiber (5) comprises the following steps:
s2.1, tapering two ends of the plurality of matched bridge fibers (5) respectively;
s2.2, respectively penetrating two ends of the tapered matching bridge fibers (5) into an optical fiber fixing device (6) of the second ferrule (2), and fixedly connecting tapered ends of the matching bridge fibers (5) with the second ferrule (2);
the synthesis treatment method comprises the following steps:
and S3.1, coaxially inserting the first ferrule (1) and the second ferrule (2) into two ends of the sleeve (3) respectively, and rotating the first ferrule (1) and/or the second ferrule (2) to enable fiber cores of the multi-core optical fiber (4) to be in one-to-one butt joint with the tapered ends of the multiple matching bridge fibers (5).
8. The method according to claim 7, wherein for step S1.1, the multicore fiber (4) is coaxially inserted into and pulled out of the first ferrule (1), and the multicore fiber (4) is rotated under a microscope such that the first marker region (7) is aligned with one core of the multicore fiber (4), and then one end of the multicore fiber (4) pulled out of the first ferrule (1) is cut along the end face of the first ferrule (1), followed by grinding and polishing.
9. The method according to claim 7, wherein for step S2.2, two tapered ends of the plurality of matching bridge fibers (5) are inserted into the hole of the optical fiber fixing device (6), the plurality of matching bridge fibers (5) are inserted out of the tapered ends of the second ferrule (2) and cut along the end face of the second ferrule (2), and then the steps are ground and polished.
10. The optical fiber and connection method according to claim 7, characterized in that for step 3.1, the first ferrule (1) and the second ferrule (2) are coaxially inserted into both ends of the sleeve (3), respectively, and the end face of the multi-core fiber (4) and the end faces of the plurality of matching bridge fibers (5) are brought into contact, after which the first ferrule (1) and/or the second ferrule (2) are rotated so that the first index zone (7) and the second index zone (8) are aligned collinearly.
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