CN115793149A - Starfish-shaped conical outer sleeve, multi-core optical fiber space division multiplexing/demultiplexing device and manufacturing method - Google Patents
Starfish-shaped conical outer sleeve, multi-core optical fiber space division multiplexing/demultiplexing device and manufacturing method Download PDFInfo
- Publication number
- CN115793149A CN115793149A CN202211098835.6A CN202211098835A CN115793149A CN 115793149 A CN115793149 A CN 115793149A CN 202211098835 A CN202211098835 A CN 202211098835A CN 115793149 A CN115793149 A CN 115793149A
- Authority
- CN
- China
- Prior art keywords
- core optical
- optical fiber
- core
- starfish
- outer sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 178
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 27
- 230000007797 corrosion Effects 0.000 claims description 20
- 238000005260 corrosion Methods 0.000 claims description 20
- 241000258957 Asteroidea Species 0.000 claims description 18
- 238000005253 cladding Methods 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 8
- 239000011247 coating layer Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000005387 chalcogenide glass Substances 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- XHGGEBRKUWZHEK-UHFFFAOYSA-L tellurate Chemical compound [O-][Te]([O-])(=O)=O XHGGEBRKUWZHEK-UHFFFAOYSA-L 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 9
- 238000004891 communication Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 239000010453 quartz Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- SITVSCPRJNYAGV-UHFFFAOYSA-L tellurite Chemical compound [O-][Te]([O-])=O SITVSCPRJNYAGV-UHFFFAOYSA-L 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
A sea star-shaped conical outer sleeve, a multi-core optical fiber space division multiplexer/demultiplexer and a manufacturing method belong to the technical field of multi-core optical fiber communication. The starfish-shaped conical outer sleeve comprises a conical cylinder, and a starfish-shaped through hole is formed in the conical cylinder. The preparation method comprises the following steps: and (3) punching by adopting regular hexagon arrangement, drawing wires, and pre-tapering one end to obtain the starfish-shaped conical outer sleeve. The multi-core optical fiber space division multiplexing/demultiplexing device adopts the steps of selecting multi-core optical fibers and single-core optical fibers, corroding one end of the single-core optical fibers, inserting the corroded one end of the single-core optical fibers into a starfish-shaped conical outer sleeve, carrying out secondary tapering and fixing, grinding the end part by using a ceramic head after bonding, and butting the end part with the multi-core optical fibers. The loss value can be reduced by preparing the multi-core optical fiber space division multiplexer/demultiplexer.
Description
Technical Field
The invention belongs to the technical field of multi-core optical fiber communication, and particularly relates to a starfish cone-shaped outer sleeve, a multi-core optical fiber space division multiplexer/demultiplexer and a manufacturing method thereof.
Background
The capacity of the traditional single-core single-mode optical fiber system rapidly increases in an optical communication network, and now reaches a bottleneck, the transmission of data puts higher requirements on the capacity of the system optical communication network, and the capacity of an optical transmission medium is further improved, so that urgent needs are met. On the basis, a series of technologies such as space division multiplexing, mode division multiplexing, wavelength division multiplexing and the like are provided to realize the optical signal transmission of a larger-capacity system. The space division multiplexing technology based on the multi-core optical fiber utilizes the space dimension to ensure that an optical fiber transmission system realizes the necessary conditions of super-large capacity, super-high speed and super-long distance transmission. The design scheme of the multi-core optical fiber becomes a research hotspot in recent years, the multi-core optical fiber communication system needs to be compatible with the existing single-mode optical fiber communication system, the signal sent by an optical transmitter is multiplexed into the multi-core optical fiber through the single-core optical fiber, the signal in the multi-core optical fiber is demultiplexed into the single-core optical fiber and is transmitted to a receiver, and thus a multi-core optical fiber space division multiplexer/demultiplexer which is connected with the multi-core optical fiber and a standard single-core optical fiber needs to be prepared to achieve the effect.
The existing preparation method of the multi-core optical fiber space division multiplexing/demultiplexing has several modes: (1) Polymer waveguide method: the scheme based on the direct-writing optical waveguide is expected to prepare a space division multiplexing/demultiplexing device with small volume and low cost, but has the defects that the preparation precision is still required to be improved on one hand, and extra loss and crosstalk are caused by the mode field mismatch at the butt joint of the waveguide and the optical fiber on the other hand; (2) free space optics: the multi-core optical fiber and the single-core optical fiber are coupled by using the micro lens, and a plurality of lenses are required to be accurately aligned, so that the operation difficulty is high, the size is large, and the cost is high; (3) bundling tapering: the space division multiplexing/demultiplexing device has the advantages that a plurality of single-core optical fibers are tapered, the end faces of the tapered optical fibers are in accurate butt joint with the multi-core optical fibers, and optical field coupling from multiple cores to single cores is achieved.
At present, the multi-core optical fiber space division multiplexer/demultiplexer is integrated into a multi-layer arrangement structure such as a 7-core optical fiber space division multiplexer/demultiplexer and a 19-core optical fiber space division multiplexer/demultiplexer, the manufacturing process of the multi-layer arrangement structure is relatively easy, and the structure obtained after the manufacturing is stable and has little influence. However, the space division multiplexing/demultiplexing devices arranged in the fiber core of the 13-core optical fiber are rare, and especially, the outermost layer has only 6 cores and requires a fixed structure, so that the manufacturing difficulty of the space division multiplexing/demultiplexing devices is greatly increased, and the prior art provides some solutions for the space division multiplexing/demultiplexing devices with the special arrangement structure:
one of the solutions of the 13-core fiber space division multiplexer/demultiplexer is as follows: the 13-core punching method adopts a method of punching a prefabricated rod, and punching is carried out on the prefabricated rod by using a structure corresponding to the multi-core optical fiber. The single core optical fiber is inserted into a perforated preform to make a multiplexer/demultiplexer.
This method has a problem that the arrangement of the inner 7 cores is liable to be misaligned or disorganized in the case where the outermost 6 cores can be fixed (see fig. 7).
The second solution of the 13-core optical fiber space division multiplexer/demultiplexer is as follows: the space division multiplexer/demultiplexer in which the 19-core optical fiber is first fabricated uses 13 cores, and this method is prone to have a problem in that the arrangement of the outermost turn is easily misaligned with the arrangement of the inner 7 cores (see fig. 8).
In summary, the preparation process of various multi-core optical fiber space division multiplexing/demultiplexing devices is affected by the used optical fibers, and the multi-core optical fiber space division multiplexing/demultiplexing device is difficult to be applied to multi-core optical fibers with a large number of fiber cores and complex fiber core arrangement, particularly space division multiplexing/demultiplexing devices of 13-core optical fibers, and has high preparation difficulty.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a starfish cone-shaped outer sleeve, a multi-core optical fiber space division multiplexer/demultiplexer and a manufacturing method thereof, the starfish cone-shaped outer sleeve is based on a low-melting-point quartz rod punching technology and is obtained by drawing, and the invention provides a manufacturing method suitable for the multi-core optical fiber space division multiplexer/demultiplexer, which is more suitable for multi-core optical fibers with complicated fiber core arrangement, in particular suitable for 13-core optical fibers, and the prepared multi-core optical fiber space division multiplexer/demultiplexer can realize the multiplexing of signals in single-core optical fibers into the multi-core optical fibers and the demultiplexing of signals in the multi-core optical fibers into the single-core optical fibers, and can reduce the loss value compared with the prior art.
The invention solves the technical problem and adopts the following technical scheme:
the invention relates to a starfish-shaped conical outer sleeve which comprises a conical cylinder, wherein a starfish-shaped through hole is formed in the conical cylinder.
The invention relates to a preparation method of a starfish cone-shaped outer sleeve, which comprises the following steps:
s1: punching a low-melting-point solid glass rod to prepare a punched prefabricated rod; the through holes of the perforating prefabricated rod are in a regular hexagon arrangement structure;
s2: drawing the perforated perform rod by a drawing tower to obtain a multi-core outer sleeve, and controlling the change of through holes in the perforated perform rod by adjusting the drawing parameters of the drawing tower to form a structure which takes six angles of a regular hexagon as vertexes and six lines are sunken, namely a starfish-shaped through hole, wherein the formed starfish-shaped through hole can enable an uncorroded single-core optical fiber bundle to be inserted into the multi-core outer sleeve;
s3: pre-tapering one end of the multi-core outer sleeve by adopting a drawing tower at the pre-tapering temperature of 1000-1050 ℃ to prepare a starfish-shaped conical outer sleeve with a conical pipe at one end; the end of the starfish-shaped conical outer sleeve which is a conical pipe is a conical through hole, and the transverse inner diameter of the conical through hole is matched with the transverse outer diameter of the corroded single-core optical fiber bundle.
Preferably, in S1, the glass material of the low-melting-point solid glass rod is selected from one of high borosilicate quartz glass, chalcogenide glass and tellurate glass.
Preferably, in the step S2, in order to ensure the quality and accuracy of the multi-core outer sleeve, the drawing length of the perforated preform is 15-20cm.
The invention relates to a preparation method of a multi-core optical fiber space division multiplexer/demultiplexer, which comprises the following steps:
the method comprises the following steps: selecting a multi-core optical fiber with N fiber cores, and selecting M single-core optical fibers according to the number of holes, wherein the diameter of the fiber core of the single-core optical fiber is matched with the diameter of a mode field and the multi-core optical fiber, N is a positive integer larger than 1, preferably 13, M is a positive integer larger than or equal to N;
step two: removing the organic coating layer from one end of the M selected single-core optical fibers, wherein the length of the part with the organic coating layer removed is 4-5 cm, immersing the part into HF solution with higher concentration to corrode the cladding until the diameter of the cladding is 1-2 mu M larger than that of the fiber core of the selected multi-core optical fiber, immersing the group of single-core optical fibers into HF solution with lower concentration to carry out secondary corrosion until the diameter of the cladding is the same as the distance between the cores of the multi-core optical fibers, and preparing a corroded single-core optical fiber bundle with a corroded section at the front end; the mass concentration of the HF solution with higher concentration is 45-50%; the mass concentration of the HF solution with lower concentration is 20-30%;
step three: inserting the corroded single-core optical fiber bundle into the end, which is not subjected to pre-tapering, of the starfish-shaped conical outer sleeve; then, carrying out low-temperature tapering on the starfish-shaped conical outer sleeve inserted with the single-core optical fiber bundle by adopting a drawing tower, wherein the low-temperature is 1000-1050 ℃, so that the pipe diameter of the starfish-shaped conical outer sleeve is contracted, and a plurality of corroded single-core optical fibers are fixed in the starfish-shaped conical outer sleeve;
step four: bonding each corroded single-core optical fiber with the starfish-shaped conical outer sleeve by using a low-viscosity adhesive to obtain a prefabricated conical tube;
and (3) penetrating a prefabricated taper pipe through the ceramic head, enabling one end of the prefabricated taper pipe, which is provided with the corrosion single-core optical fiber bundle, to be arranged on the same plane as the ceramic head, then bonding the ceramic head and one end of the prefabricated taper pipe, which is provided with the corrosion single-core optical fiber bundle, together by using a low-viscosity adhesive 353ND, grinding and polishing one end of the prefabricated taper pipe, which is provided with the corrosion single-core optical fiber bundle, and then butting the end of the prefabricated taper pipe and the multi-core optical fiber to prepare the space division multiplexing/demultiplexing device for the multi-core optical fiber, particularly the space division multiplexing/demultiplexing device for the 13-core optical fiber.
Preferably, in the first step, the multicore fiber is a homogeneous multicore fiber or a heterogeneous multicore fiber.
Preferably, in the second step, the corrosion area is 5cm in the corrosion process, and the surface of the solution is covered with a layer of organic grease to prevent volatilization of HF.
Preferably, in the fourth step, the starfish-shaped cone-shaped outer sleeve is fixed with the corroded single-core optical fiber, then the ceramic head is inserted, the corroded single-core optical fiber is fixed by using low-viscosity glue, and then grinding and polishing are carried out to manufacture the multiplexer, and the multiplexer is in butt joint with the multi-core optical fiber which is inserted into the ceramic head after grinding and polishing.
The multi-core optical fiber space division multiplexer/demultiplexer is prepared by the preparation method, and the average value of the few-mode transmission loss of the multi-core optical fiber space division multiplexer/demultiplexer is 0.23dB.
Compared with the prior art, the starfish cone-shaped outer sleeve and the multi-core optical fiber space division multiplexer/demultiplexer and the manufacturing method thereof have the following advantages:
the multi-core optical fiber space division multiplexer/demultiplexer provided by the invention is suitable for optical fibers with complicated fiber core arrangement by utilizing the characteristic of flexibility when low-melting-point materials are drawn and stacked or punched.
The invention uses the starfish cone-shaped outer sleeve as the outer sleeve of the single-core optical fiber bundle, the arrangement structure of the 13 cores is more compact due to the recess of the outer edge in the process of manufacturing the 13-core optical fiber multiplexer/demultiplexer, and the redundant six cores are positioning cores due to the adoption of a 19-core punching arrangement mode, so that the peripheral six cores of the used 13 cores can be ensured not to be in wrong positions.
The invention uses the low-melting point quartz material as the starfish-shaped conical outer sleeve of the optical fiber bundle, and the internal optical fiber structure is not influenced when the starfish-shaped conical outer sleeve is expanded and contracted in size.
The ceramic head is used for butt joint, the rotation can be carried out between butt joint objects, and the butt joint position with the minimum butt joint loss power can be found.
Compared with the common lens coupling method and the polymer waveguide method, the preparation process of the invention has simpler operation and lower cost.
The multi-core optical fiber space division multiplexing/demultiplexing device manufactured by the invention has small volume, is flexible and durable, and can be produced in batch.
Drawings
FIG. 1 is a schematic diagram of the etching process of a single-core optical fiber according to the present invention;
FIG. 2 is a schematic diagram of the corrosion of 13 single-core optical fiber bundles and 6 positioning optical fibers in example 1 of the present invention;
fig. 3 is a schematic diagram of a starfish-shaped outer sleeve used in a space division multiplexer/demultiplexer for manufacturing a 13-core optical fiber by using a punching method according to embodiment 1 of the present invention; (a) Is a schematic diagram of a perforated preform, and (b) is a schematic diagram of a multi-core outer sleeve obtained after drawing the perforated preform.
FIG. 4 is a schematic end view of the starfish cone-type outer sleeve obtained after pre-tapering according to example 1 of the present invention.
Fig. 5 is a schematic front and rear end faces of a space division multiplexer/demultiplexer for manufacturing a 13-core optical fiber according to embodiment 1 of the present invention, which are tapered twice; (a) Is a schematic end face view of a starfish cone-shaped outer sleeve for inserting a corroded single-core optical fiber bundle; (b) Drawing rear end face schematic view
Fig. 6 is an end view of a finished space division multiplexer/demultiplexer of a 13-core optical fiber manufactured in example 1 of the present invention.
Fig. 7 is a schematic diagram of a space division multiplexer/demultiplexer of a 13-core optical fiber prepared by a 13-core drilling method.
Fig. 8 is a schematic diagram of a nineteen-core optical fiber space division multiplexer/demultiplexer.
Fig. 9 is a schematic view showing the position of the outermost layer structure of the 13-core structure.
Fig. 10 is a schematic view showing the error position easily occurring in the outermost layer structure of the 13-core structure.
Fig. 11 is a schematic view of the overall arrangement of the 13-core structure.
Fig. 12 is a schematic view of a 13-core structure in a staggered arrangement.
Detailed Description
The present invention will be described in further detail with reference to examples.
For better clarity of the objects, technical solutions and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. The examples herein are merely illustrative and not intended to limit the present invention. In addition, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The standard 125 μm single-core optical fiber was etched to a desired cladding diameter by chemical etching using the method shown in fig. 1, and the space division multiplexer/demultiplexer of example 1, which is a 13-core homogeneous optical fiber, was prepared such that the core pitch of the 13-core multi-core optical fiber was 42 μm, and then 19 single-core optical fibers were first etched to a cladding diameter of 42 μm. The HF coating is covered with an organic grease to prevent HF from volatilizing. Fig. 2 is a comparison diagram of 13 homogeneous single-core optical fiber bundles and 6 positioning optical fiber bundles before and after corrosion in example 1, the fiber cores are unchanged in size, the cladding diameter is reduced to a target size, the cladding diameter of the corroded optical fiber is equal to the core space of the multi-core optical fiber to be matched, the 13 optical fibers and the 6 positioning optical fibers are bundled into the optical fiber bundle shown in fig. 2, the diameter of a single optical fiber before corrosion is α '=125 μm, and the diameter of the single optical fiber after corrosion is β' =42 μm.
The method comprises the steps of preparing a low-melting-point solid glass rod, perforating by adopting a water jet cutter, and manufacturing a perforated prefabricated rod, wherein the low-melting-point solid glass rod is made of high borosilicate quartz glass, chalcogenide glass and tellurate glass, and the high borosilicate quartz glass material is selected in the embodiment. The perforated preform produced by the perforation method is shown in fig. 3. The outer diameter of the perforated preform is D ', the outer diameter distance of the center line holes is B', and the inner diameter B 'of the center line hole of the outer sleeve after drawing is slightly larger than the diameter 3 beta' of the center line of the 13-core optical fiber bundle. And cutting the drawn multi-core outer sleeve into small sections of 10cm by selecting a proper size.
Pre-tapering one end of a multi-core outer sleeve by using a drawing tower to prepare a starfish cone-shaped outer sleeve with a tapered pipe at one end, wherein a real end drawing of the starfish cone-shaped outer sleeve is shown in figure 4, the tapered drawing uses the tapering function of a FSM-100P + fusion splicer, the inner diameter of a central line hole of the multi-core outer sleeve after tapering is slightly larger than the diameter of a central line 3 beta ' after the corrosion of a 13-core optical fiber bundle, the inner diameter of the rear end of the multi-core outer sleeve keeps b ' unchanged, mu = b ' -3 alpha is regarded as the fault tolerance of the tapered pipe, and the fault tolerance mu is generally 3-6 mu m in order to ensure that the optical fiber can be smoothly inserted into the starfish cone-shaped outer sleeve after corrosion and keep hexagonal arrangement.
The corroded single-core optical fiber bundle is inserted into the starfish-shaped conical outer sleeve by using the adjusting frame, and then the starfish-shaped conical outer sleeve is subjected to secondary tapering, so that the internal optical fiber is tightly bound by the starfish-shaped conical outer sleeve, and the internal quartz optical fiber is not influenced by controlling the temperature during tapering due to the lower melting point of the starfish-shaped conical outer sleeve, as shown in fig. 5. And (4) packaging the position where the distance between the intercepting holes is equal to the diameter of the multi-core optical fiber in the ceramic head at the cone waist, cutting and grinding the end face, and then butting the end face with the multi-core optical fiber.
The 6 cores are positioned to ensure that the remaining 13 cores remain in the desired 13-core arrangement, while the starfish-shaped recessed configuration makes the 13-core arrangement more compact.
Example 1
Space division multiplexer/demultiplexer of 13-core optical fiber
In the embodiment of the invention, a 13-core homogeneous optical fiber with a fiber core arranged in a landmine shape is selected, the core spacing is 42 mu m, the cladding diameter is 240 mu m, and the coating layer is removed and cleaned.
Taking 19 single-core optical fibers with the fiber core diameter matched with the multi-core optical fiber, wherein 13 optical fibers are used by a 13-core multiplexer/demultiplexer, 6 optical fibers are used as positioning fiber cores in the manufacturing process, the diameter of a mode field of the single-core optical fiber is the same as that of the multi-core optical fiber, removing an organic coating layer at one end, and taking a dust-free paper towel to dip alcohol to wipe surface debris and dust.
The target single core fiber cladding diameter was etched to 42 μm. HF is selected for corrosion of the quartz cladding, one end of each of 13 single-core optical fibers, from which the coating is removed, is put into HF acid with the mass concentration of 45% for rapid corrosion, the corrosion height is 5cm, and a layer of grease is covered on the surface of the HF to prevent the HF from volatilizing. After 35 minutes of etching, the single core optical fiber was taken out and washed with deionized water, and the diameter of the cladding of the single core optical fiber was 50 μm. And then, putting the cleaned single-core optical fiber into an HF solution with the mass concentration of 25% for slow corrosion, wherein after the single-core optical fiber is corroded for 30 minutes, the diameter of the quartz cladding is 45 micrometers, and when the single-core optical fiber is close to a target value and is corroded to 42 micrometers accurately, the optical fiber needs to be taken out every 5 minutes to observe the diameter until the target value is reached.
Selecting a low-melting-point solid glass rod, wherein the material of the low-melting-point solid glass rod can be high borosilicate glass, tellurite glass and chalcogenide glass. In this example, boron-doped quartz glass with a diameter of 20mm and a length of 15cm is selected, and holes are punched according to fig. 3 (a) to form regular hexagonal through holes, so as to obtain a punched preform.
And (3) drawing the perforated preform rod at the drawing temperature of 1000 ℃, controlling the rod feeding speed and the traction speed of a drawing tower, and controlling the variation range of the outer diameter within 625-635 mu m to form a structure which takes six corners of a regular hexagon as vertexes and six lines are sunken, namely a starfish-shaped through hole, and cutting the multi-core outer sleeve after drawing into small sections of 10 cm. Pre-tapering the cut multi-core outer sleeve, and using the tapering function of the FSM-100P + fusion splicer, wherein the inner diameter of the central line of the front-end hole is about 3 multiplied by 42 mu m to 3 multiplied by 43 mu m after tapering, and the outer diameter of the rear end is kept unchanged.
And inserting the corroded single-core optical fiber bundle with the cladding diameter of 42 mu m into the small hole from the outer diameter of the large hole by using an adjusting frame, and performing secondary tapering on the starfish-shaped conical outer sleeve after the single-core optical fiber bundle is inserted, wherein the tapering temperature is 1000 ℃, and is far lower than the softening temperature of the internal quartz optical fiber, so that the starfish-shaped conical outer sleeve can tightly attach the optical fiber bundle without damaging the internal optical fiber structure.
Cutting off the front end outer sleeve, solidifying the front end outer sleeve into the ceramic head, grinding the front end outer sleeve, fixing the rear end outer sleeve by using a low-viscosity adhesive, and butting the front end ceramic head with the multi-core optical fiber.
The end face of the space division multiplexer/demultiplexer of the finished 13-core optical fiber is shown in fig. 6, wherein the six fiber cores marked in black are positioning fiber cores and only play a positioning role and do not participate in the use of the 13-core space division multiplexer/demultiplexer.
Compared with the space division multiplexer/demultiplexer adopting 19-core optical fiber and using 13 cores therein, the space division multiplexer/demultiplexer adopting the starfish-shaped conical outer sleeve with the starfish-shaped through hole can ensure the normal arrangement of 7 cores inside and improve and solve the dislocation problem in the scheme.
By the method of the invention, 6 positioning fiber cores in 13 cores can ensure that the outermost fiber cores can be positioned in the middle of every two inner circles, as shown in FIG. 9, but not in the corners as shown in FIG. 10, and the structure can be ensured not to have problems.
Secondly, the dislocation problem is caused, because the starfish cone-shaped outer sleeve introduces the concave structure, the outermost cores have a significant binding force in the inward direction, and the cores do not have small dislocation or misalignment and slight deviation (see fig. 11 and 12).
Comparative example 1
And (3) adopting a 13-core punching method and a punching prefabricated rod method, and punching on the prefabricated rod by using a structure corresponding to the multi-core optical fiber, namely, punching in a landmine shape. A single-core optical fiber is inserted into a perforated preform to fabricate a multiplexer/demultiplexer.
Comparative example 2
The prefabricated rod of the 19-core optical fiber is punched, the hole is also in a regular hexagon shape during drawing, and the 13 cores of the prefabricated rod are used as the space division multiplexer/demultiplexer of the 13-core optical fiber to form the space division multiplexer/demultiplexer of the 19-core optical fiber.
Test example
The space division multiplexer/demultiplexer of the 13-core optical fiber prepared in example 1 and the space division multiplexer/demultiplexer of the 13-core optical fiber prepared in comparative examples 1 to 2 were butted to the 13-core optical fiber, and the butting loss was measured, and the loss value of comparative example 1 was as follows:
analysis of the results in the table shows that the core insertion loss of comparative example 1, 2, and 3 is too large because the central 7 cores are arranged disorderly.
The loss values of comparative example 2 are as follows:
as a result of the table, the cores 12 and 13 in comparative example 2 were the outermost cores, and the cause of the large insertion loss was the displacement problem of the outermost cores.
The loss values of the space division multiplexer/demultiplexer of the 13-core optical fiber of the present invention are as follows:
the space division multiplexer/demultiplexer of the 13-core optical fiber prepared by the method of the present invention is illustrated, which has the smallest loss value.
Claims (9)
1. A starfish cone-shaped outer sleeve is characterized by comprising a cone-shaped cylinder, wherein a starfish through hole is formed in the cone-shaped cylinder.
2. The method of making a starfish cone-type outer sleeve of claim 1, comprising the steps of:
s1: punching a low-melting-point solid glass rod to prepare a punched prefabricated rod; the through holes of the perforating prefabricated rod are in a regular hexagon arrangement structure;
s2: drawing the perforated perform rod by a drawing tower to obtain a multi-core outer sleeve, and controlling the change of through holes in the perforated perform rod by adjusting the drawing parameters of the drawing tower to form a structure which takes six angles of a regular hexagon as vertexes and six lines are sunken, namely a starfish-shaped through hole, wherein the formed starfish-shaped through hole can enable an uncorroded single-core optical fiber bundle to be inserted into the multi-core outer sleeve;
s3: pre-tapering one end of the multi-core outer sleeve by adopting a drawing tower at the pre-tapering temperature of 1000-1050 ℃ to prepare a starfish-shaped conical outer sleeve with a conical pipe at one end; the end of the starfish-shaped conical outer sleeve which is a conical pipe is a conical through hole, and the transverse inner diameter of the conical through hole is matched with the transverse outer diameter of the corroded single-core optical fiber bundle.
3. The method for preparing a starfish-shaped cone-shaped outer sleeve according to claim 2, wherein in S1, the low-melting-point solid glass rod is made of one of high borosilicate quartz glass, chalcogenide glass and tellurate glass.
4. The method of claim 2, wherein in step S2, the draw length of the perforated preform is 15-20cm to ensure the quality and accuracy of the multi-core outer jacket tube.
5. A method for preparing a multi-core optical fiber space division multiplexer/demultiplexer, wherein the starfish cone-shaped outer sleeve of claim 1 is adopted, and the method comprises the following steps:
the method comprises the following steps: selecting a multi-core optical fiber with N fiber cores, and selecting M single-core optical fibers according to the number of the holes, wherein the diameter of the fiber core of the single-core optical fiber is matched with the diameter of a mode field and the multi-core optical fiber, N is a positive integer larger than 1, and M is a positive integer larger than or equal to N;
step two: removing the organic coating layer from one end of the M single-core optical fibers, corroding the end, from which the organic coating layer is removed, by using an HF solution, and arranging the corroded ends into a corroded single-core optical fiber bundle according to the holes;
step three: inserting the corroded single-core optical fiber bundle into the starfish-shaped conical outer sleeve from the end without pre-tapering; then, carrying out low-temperature tapering on the starfish-shaped conical outer sleeve inserted with the single-core optical fiber bundle by adopting a drawing tower, wherein the low-temperature is 1000-1050 ℃, so that the pipe diameter of the starfish-shaped conical outer sleeve is shrunk, and a plurality of corroded single-core optical fibers are fixed in the starfish-shaped conical outer sleeve;
step four: bonding each corroded single-core optical fiber with the starfish cone-shaped outer sleeve by using a low-viscosity adhesive to obtain a prefabricated taper pipe;
and (3) penetrating the prefabricated taper pipe through the ceramic head, enabling one end of the prefabricated taper pipe, which is provided with the corrosion single-core optical fiber bundle, to be arranged on the same plane as the ceramic head, bonding the ceramic head and one end of the prefabricated taper pipe, which is provided with the corrosion single-core optical fiber bundle, together, grinding and polishing one end of the prefabricated taper pipe, which is provided with the corrosion single-core optical fiber bundle, and then butting the end of the prefabricated taper pipe with the multi-core optical fiber to prepare the space division multiplexing/demultiplexing device for the multi-core optical fiber.
6. The method for preparing the multi-core fiber space division multiplexing/demultiplexing device according to claim 5, wherein in the first step, the multi-core fiber is a homogeneous multi-core fiber or a heterogeneous multi-core fiber.
7. The method for preparing the multi-core optical fiber space division multiplexing/demultiplexing device according to claim 5, wherein in the second step, the length of the part of the removed organic coating layer is 4-5 cm, the part is immersed into the HF solution with higher concentration to corrode the cladding until the diameter of the cladding is 1-2 μm larger than that of the core of the selected multi-core optical fiber, and then the group of single-core optical fibers are immersed into the HF solution with lower concentration to carry out secondary corrosion until the diameter of the cladding is the same as the distance between the cores of the multi-core optical fibers, so as to prepare a corroded single-core optical fiber bundle with a corroded section at the front end; the mass concentration of the HF solution with higher concentration is 45-50%; the mass concentration of the HF solution with lower concentration is 20-30%.
8. The method for preparing the multi-core optical fiber space division multiplexing/demultiplexing device according to claim 5, wherein the adhesive used for bonding the ceramic tip and the one end of the pre-fabricated taper tube arranged etched single-core optical fiber bundle together is a low-viscosity adhesive 353ND.
9. A multi-core fiber space division multiplexer/demultiplexer, characterized in that it is manufactured by the manufacturing method of any one of claims 5-8, and its average value of few-mode transmission loss is 0.23dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211098835.6A CN115793149A (en) | 2022-09-07 | 2022-09-07 | Starfish-shaped conical outer sleeve, multi-core optical fiber space division multiplexing/demultiplexing device and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211098835.6A CN115793149A (en) | 2022-09-07 | 2022-09-07 | Starfish-shaped conical outer sleeve, multi-core optical fiber space division multiplexing/demultiplexing device and manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115793149A true CN115793149A (en) | 2023-03-14 |
Family
ID=85431858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211098835.6A Pending CN115793149A (en) | 2022-09-07 | 2022-09-07 | Starfish-shaped conical outer sleeve, multi-core optical fiber space division multiplexing/demultiplexing device and manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115793149A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3846010A (en) * | 1973-07-05 | 1974-11-05 | Corning Glass Works | Optical waveguide connector |
| GB1601277A (en) * | 1977-06-10 | 1981-10-28 | Hughes Aircraft Co | Optical fibre connector |
| CN112904485A (en) * | 2021-01-29 | 2021-06-04 | 东北大学 | Space division multiplexing/demultiplexing device for multi-core optical fiber and preparation method thereof |
| US20220066113A1 (en) * | 2020-08-25 | 2022-03-03 | Northeastern University | Gas pressure maintaining and adjusting device, and microstructure optical fiber and preparation method thereof |
| CN114509848A (en) * | 2022-02-16 | 2022-05-17 | 东北大学 | Inner hexagon inserting core assembly, fan-in fan-out multiplexing device and preparation method |
| CN114924345A (en) * | 2022-06-14 | 2022-08-19 | 东北大学 | Inner hexagonal capillary tube, manufacturing method thereof and application of inner hexagonal capillary tube in multi-core space division multiplexer |
-
2022
- 2022-09-07 CN CN202211098835.6A patent/CN115793149A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3846010A (en) * | 1973-07-05 | 1974-11-05 | Corning Glass Works | Optical waveguide connector |
| GB1601277A (en) * | 1977-06-10 | 1981-10-28 | Hughes Aircraft Co | Optical fibre connector |
| US20220066113A1 (en) * | 2020-08-25 | 2022-03-03 | Northeastern University | Gas pressure maintaining and adjusting device, and microstructure optical fiber and preparation method thereof |
| CN112904485A (en) * | 2021-01-29 | 2021-06-04 | 东北大学 | Space division multiplexing/demultiplexing device for multi-core optical fiber and preparation method thereof |
| CN114509848A (en) * | 2022-02-16 | 2022-05-17 | 东北大学 | Inner hexagon inserting core assembly, fan-in fan-out multiplexing device and preparation method |
| CN114924345A (en) * | 2022-06-14 | 2022-08-19 | 东北大学 | Inner hexagonal capillary tube, manufacturing method thereof and application of inner hexagonal capillary tube in multi-core space division multiplexer |
Non-Patent Citations (1)
| Title |
|---|
| 张函, 程同蕾.ET.AL: "低串扰高密度复合型多芯光子晶体的光纤理论研究", 中国激光, vol. 48, no. 7, 30 April 2021 (2021-04-30) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112904485B (en) | Space division multiplexing/demultiplexing device for multi-core optical fiber and preparation method thereof | |
| US7419308B2 (en) | Fiber bundle termination with reduced fiber-to-fiber pitch | |
| US7236671B2 (en) | Fiber bundles and methods of making fiber bundles | |
| CN108493750B (en) | Manufacturing method of optical fiber end face pump coupler based on sleeve | |
| CN104297866B (en) | A kind of spatial reuse/demodulation multiplexer being applicable to multi-core fiber and preparation method thereof | |
| CN110488417B (en) | Multi-core fiber coupler preparation method based on reverse tapering technology | |
| CN111487722B (en) | Eight-core optical fiber multiplexing demultiplexer and preparation method thereof | |
| WO2006026542A2 (en) | Fiber bundles and methods of making fiber bundles | |
| CN102096145B (en) | Multi-core polarization maintaining fiber and manufacturing method thereof | |
| CN101866032A (en) | Signal light combiner and fabrication method | |
| US4229197A (en) | Method for making multiple optical core fiber | |
| CN109061801B (en) | High-power signal beam combiner and manufacturing method thereof | |
| CN111158090A (en) | 45-degree optical fiber array with small optical fiber diameter and operation method thereof | |
| CN111552025A (en) | Multi-core fiber Fan-in/out device with concave triple-clad transition fiber | |
| CN113534347A (en) | Non-contact glass capillary diameter control method | |
| CN112421367A (en) | Preparation method of optical fiber end face pump coupler based on sleeve method | |
| EP2610660A1 (en) | Connector-incorporated multi-core optical fiber | |
| CN112946821B (en) | Module selection photon lantern preparation method based on sleeve method | |
| CN114690321A (en) | Multi-core few-mode optical fiber multiplexer based on photon lantern and manufacturing method thereof | |
| CN115793149A (en) | Starfish-shaped conical outer sleeve, multi-core optical fiber space division multiplexing/demultiplexing device and manufacturing method | |
| CN113777717A (en) | Multi-core optical fiber fan-in and fan-out module and manufacturing method thereof | |
| CN112397983A (en) | Preparation method of optical fiber end surface pump coupler based on torsion method | |
| CN115047566B (en) | Method for preparing space division multiplexing/demultiplexing device for multi-core optical fiber | |
| CN114509848A (en) | Inner hexagon inserting core assembly, fan-in fan-out multiplexing device and preparation method | |
| CN113866882A (en) | Novel optical fiber mode division multiplexer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |