CN117492139A - 1X 3 light beam splitter and processing method thereof - Google Patents
1X 3 light beam splitter and processing method thereof Download PDFInfo
- Publication number
- CN117492139A CN117492139A CN202310437178.1A CN202310437178A CN117492139A CN 117492139 A CN117492139 A CN 117492139A CN 202310437178 A CN202310437178 A CN 202310437178A CN 117492139 A CN117492139 A CN 117492139A
- Authority
- CN
- China
- Prior art keywords
- optical
- fiber
- tapering
- quartz
- fibers
- 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
- 238000003672 processing method Methods 0.000 title description 5
- 239000013307 optical fiber Substances 0.000 claims abstract description 130
- 239000000835 fiber Substances 0.000 claims abstract description 115
- 239000010453 quartz Substances 0.000 claims abstract description 89
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 89
- 230000003287 optical effect Effects 0.000 claims abstract description 46
- 239000010410 layer Substances 0.000 claims description 42
- 238000005253 cladding Methods 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 235000009161 Espostoa lanata Nutrition 0.000 claims description 3
- 240000001624 Espostoa lanata Species 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 230000001808 coupling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a 1×3 optical beam splitter, which comprises an optical fiber group and two quartz capillaries, wherein the two quartz capillaries are axially spaced at a certain distance, the optical fiber group passes through the two quartz capillaries, the optical fiber group comprises an inner layer optical fiber and six outer layer optical fibers, and the six outer layer optical fibers are uniformly distributed along the circumferential direction by taking the inner layer optical fiber as the center; the inner layer optical fibers are single-mode optical fibers, the six outer layer optical fibers comprise three single-mode optical fibers and three coreless optical fibers, and the single-mode optical fibers and the coreless optical fibers are arranged at intervals one by one; the optical fiber bundles inside the two quartz capillaries and between the two quartz capillaries are bare fibers, the quartz capillaries and the optical fiber bundles form a beam splitter after being tapered, an inner layer single mode fiber at one end of the beam splitter is used as input, three outer layer single mode fibers at the other end of the beam splitter are used as output, and the input and the output are both positioned outside the quartz capillaries. The invention can realize the input of 1:1:1 broadband equipartition output.
Description
Technical Field
The invention relates to an optical communication system, in particular to a 1X 3 optical beam splitter and a processing method thereof.
Background
The optical fiber coupler is used as an optical passive device for realizing the combination and branching of optical signals, is continuously developed in the traditional optical communication field, and is increasingly widely used in the industrial manufacturing and even aerospace fields. With the rapid development of the optical communication field, more demands are being put on the degree of automated production of optical fiber devices and the stability and loss of the devices themselves. The optical fiber coupler is more miniaturized, integrated and compact, and the rapid development of the optical fiber communication system and the optical fiber sensing system is greatly promoted.
The realization of beam combining and splitting of optical signals has been a major concern in the field of optical communications, and in many cases, a plurality of optical fiber devices are required in communications, and then optical fiber couplers are required to connect nodes of each device. Currently widely used in the market are also 1 x 2 and 2 x 2 fiber optic splitters for implementing 50:50 spectral ratio, operating bandwidth about 20nm. The star coupler with more ports is formed by cascading a plurality of 1X 2 beam splitters, and although the star coupler has more ports, the uneven output of a single coupler is amplified continuously along with the increase of the cascading number, so that the overall average uniformity of the device is poor, and the loss of the device is increased. The existing planar 1×3 optical beam splitter used in the market needs three optical fibers with consistent spacing and difficult control, and the prepared device has poor equipartition and narrow bandwidth.
Therefore, the broadband optical fiber beam splitter which is designed and manufactured into multiple ports, good in equipartition, low in loss and low in cost has great academic significance and economic value.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a 1X 3 optical beam splitter, which can realize the 1 to the input optical signal: 1:1 broadband equipartition output.
The present invention achieves the above technical object by the following means.
The 1X 3 optical beam splitter comprises an optical fiber group and two quartz capillaries, wherein the two quartz capillaries are axially spaced at a distance, the optical fiber group passes through the two quartz capillaries, the optical fiber group comprises an inner layer optical fiber and six outer layer optical fibers, and the six outer layer optical fibers are uniformly distributed along the circumferential direction by taking the inner layer optical fiber as the center; the inner layer optical fibers are single-mode optical fibers, the six outer layer optical fibers comprise three single-mode optical fibers and three coreless optical fibers, and the single-mode optical fibers and the coreless optical fibers are arranged at intervals one by one; the optical fiber bundles inside the two quartz capillaries and the optical fiber bundles between the two quartz capillaries are bare fibers, the optical fiber bundles between the two quartz capillaries are first bare fiber bundles, the quartz capillaries and the optical fiber bundles form a beam splitter after tapering, tapering occurs in the middle part of the first bare fiber bundles, the first bare fiber bundles are sequentially a middle melting area, two side tapering areas and an outer unstretched area from the middle to the two ends after tapering, an inner layer single mode fiber at one end of the beam splitter is an input end, three outer layer single mode fibers at the other end of the beam splitter are output ends, and the input end and the output end are both positioned outside the quartz capillaries.
Further, the cladding diameter of the coreless fiber is equal to the diameter of the single mode fiber.
Further, the cladding refractive index of the coreless fiber should be less than or equal to the refractive index of the single mode fiber cladding.
Further, the inner diameter ds of the quartz capillary and the diameter dg of the bare fiber satisfy the following conditions: and ds-3dg is more than or equal to 5 mu m and less than or equal to 10 mu m.
Furthermore, the optical fiber group bundle and the quartz capillary tube are fixed by uv glue and then tapered.
Further, the wall thickness of the quartz capillary tube is 200-300 mu m, and the length is 1-3 cm.
The invention also provides a processing method of the 1X 3 optical beam splitter, which comprises the following steps:
step one: the two quartz capillaries are arranged at a distance in the axial direction, the areas inside the quartz capillaries and between the two quartz capillaries are bare fiber areas, a coating layer is stripped from part of optical fibers corresponding to the bare fiber areas in the optical fiber group bundle, and the optical fibers are wiped by alcohol cotton balls;
step two, a step two is carried out; passing an optical fiber group bundle through a quartz capillary, wherein uv glue is adopted to fix the optical fiber group bundle and the quartz capillary;
step three: placing the quartz capillary and the optical fiber group bundle on a tapering platform, and clamping the two quartz capillaries by using a tapering machine clamp;
step four: the single-wavelength continuous power laser is connected to one end of an inner layer single-mode fiber, and the other ends of the inner layer single-mode fiber and the outer layer three single-mode fibers are respectively connected to an optical power meter;
step five: and (3) tapering by adopting a fused tapering system, wherein the tapering part is a bare fiber part between two quartz capillaries, and the tapering termination time is determined according to the monitoring result of the optical power meter.
In the third step, before the quartz capillary and the optical fiber bundle are placed on the tapering platform of the fused tapering system, the bare fiber between the two quartz capillaries is twisted, and the relationship between the twisting angle θ and the bare fiber length Ls is required to satisfy: θ/Ls <5 °, ls is in mm.
In the fifth step, a fusion tapering machine is adopted for tapering, the flow rate of hydrogen is selected to be 120-180 ml/min, the stretching speed is 50-80 mu m/s, the diameter of a single optical fiber cladding in a middle melting zone after tapering is 38-43 mu m, the length of the melting zone is 4-7 mm, and the lengths of taper zones at two sides are 10-15 mm.
Further, in the tapering process, when the output power of the inner layer single mode fiber reaches below 5% of the total output power, the output end optical power of the outer layer three single mode fibers reaches 31.6% -35% of the total output power, and tapering is stopped.
The invention has the beneficial effects that:
1) The invention realizes the equipartition output of input light by utilizing the symmetry of the optical power coupled in four single mode fibers by matching the inner layer single mode fiber and the outer layer three single mode fiber with the coreless optical fiber group beam after tapering, and realizes the broadband output of 1 multiplied by 3.
2) The invention separates the outer three single-mode fibers by using the coreless fiber as the supporting structure, and the coreless fiber has only a cladding structure and can not generate a binding effect on optical power. The same outer three single-mode fibers are separated by two coreless fibers, so that the coupling effect between the outer three single-mode fibers and the inner single-mode fibers is greatly reduced due to the longer distance, and the outer three single-mode fibers are only coupled with the inner single-mode fibers in the tapering area.
3) Because two quartz capillaries are adopted to fix the optical fiber bundle, the outer layer single mode optical fiber and the inner layer single mode optical fiber can keep good relative positions and relations, and the uniformity and broadband characteristic of light beam splitting are ensured. Due to symmetry, the optical fiber bundle can be twisted at a certain angle when being fused and tapered, and the influence on the coupling efficiency of the optical fibers caused by certain gaps among the optical fibers under the condition of no twisting can be reduced, and meanwhile, the influence on the coupling efficiency of the optical fibers caused by twisting is small.
Drawings
FIG. 1 is a schematic cross-sectional view of a 1×3 optical splitter according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a 1×3 optical splitter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a melt tapering system;
FIG. 4 is a schematic diagram of the structure of a single fiber after tapering;
FIG. 5 is a graph of optical power coupling in four single mode fibers;
fig. 6 shows that the output end of the 1×3 optical splitter according to the embodiment of the present invention has a splitting ratio of 1:1: bandwidth at 1;
FIG. 7 shows the effect of torsion on device equipartition performance of a 1X 3 beam splitter according to an embodiment of the present invention during beam-combining preparation.
Reference numerals:
1-single mode fiber, 2-coreless fiber, 3-quartz capillary, 4-input fiber, 5-output fiber, 6-first bare fiber bundle.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
The following describes a 1×3 optical beam splitter according to an embodiment of the present invention in detail with reference to the accompanying drawings.
Referring to fig. 1 to 2, a 1×3 optical splitter according to an embodiment of the present invention includes an optical fiber bundle and two quartz capillaries, the two quartz capillaries are axially spaced apart by a distance, the optical fiber bundle passes through the two quartz capillaries, the optical fiber bundle includes an inner optical fiber and six outer optical fibers, the six outer optical fibers are uniformly distributed in a circumferential direction with the inner optical fiber as a center, and a central connection line of any adjacent three optical fibers in the optical fiber bundle forms a regular triangle. The inner layer optical fibers are single-mode optical fibers 1, six outer layer optical fibers comprise three single-mode optical fibers 1 and three coreless optical fibers 2, and the outer layer single-mode optical fibers 1 and the coreless optical fibers 2 are arranged at intervals one by one; the optical fiber bundles inside the two quartz capillaries 3 and the optical fiber bundles between the two quartz capillaries 3 are bare fiber quartz capillaries 3, the optical fiber bundles between the two quartz capillaries 3 are first bare fiber bundles 6, the quartz capillaries 3 and the optical fiber group bundles form a beam splitter after tapering, tapering occurs in the middle part of the first bare fiber bundles 6, and after tapering, the first bare fiber bundles 6 are sequentially provided with a middle melting zone, two side tapering zones and an outer unstretched zone from the middle to the two ends. The inner layer single mode fiber 1 at one end of the beam splitter is an input end 3, the outer layer three single mode fibers 1 at the other end of the beam splitter are output ends 4, and the input end 3 and the output end 4 are both positioned outside the quartz capillary 3.
Further, the cladding diameter of the coreless fiber 2 is equal to the diameter of the single-mode fiber 1, so that the arrangement is compact.
Furthermore, the refractive index of the cladding of the coreless fiber 2 should be smaller than or equal to the refractive index of the cladding of the single-mode fiber 1, so that the coreless fiber 2 only acts to maintain the symmetrical structure of the outer-layer single-mode fiber 1, and the coreless fiber 2 does not have a binding effect on the optical power, so that the optical power can only be transferred between the inner-layer single-mode fiber 1 and the outer-layer three single-mode fibers 1. The same outer three single-mode fibers 1 are separated by two coreless fibers 2, so that the coupling effect cannot occur between the outer three single-mode fibers 1 and the inner layer, and the outer three single-mode fibers 1 are only coupled with the inner layer along with the reduction of the fiber core spacing when the single-mode fibers 1 are tapered.
Further, the inner diameter ds of the quartz capillary 3 and the diameter dg of the bare fiber satisfy: and ds-3dg is more than or equal to 5 mu m and less than or equal to 10 mu m.
Furthermore, the optical fiber group bundle and the quartz capillary 3 are fixed by uv glue, then the tapering is carried out, the uv glue is dripped from two ends of the quartz tube, and then the fixation is realized by irradiation of a uv curing lamp for 2-5 minutes.
Further, the thickness of the wall of the quartz capillary 3 is 200-300 μm, and too thin results in insufficient structural rigidity and is liable to fracture when clamped by a clamp. The length of the quartz capillary tube is 1-3 cm, too short length can lead to difficult clamping and fixing, and too long length can lead to too long stripping coating area in the middle of the optical fiber to easily break when tapering so as to influence the preparation effect. The inner diameter of the quartz tube is 5-10 μm larger than three times of the diameter of the optical fibers, so that seven groups of optical fibers can be placed in the quartz tube, and the optical fibers can keep on maintaining the arrangement structure when the optical fibers are tapered, and if the inner diameter of the quartz tube is too large, the optical fibers cannot be tightly arranged in the quartz tube, so that the preparation performance of a final device is affected. The seven group beam optical fibers and the outer quartz tube are fixed through uv glue, and the state before tapering is shown in figure 2.
According to an embodiment of the invention, a processing method of a 1×3 optical beam splitter includes:
step one: the areas inside the quartz capillaries 3 and between the two quartz capillaries 3 are bare fiber areas, the coating layer of the part of the optical fibers corresponding to the bare fiber areas in the optical fiber group is stripped, and the optical fibers are wiped by alcohol cotton balls;
step two, a step two is carried out; the optical fiber bundle passes through the quartz capillary tube 3, the optical fiber bundle and the quartz capillary tube 3 are fixed by adopting uv glue, the uv glue is particularly used for dripping into two ports of the quartz tube, which are contacted with the optical fiber bundle, and the two ends of the quartz tube are respectively irradiated by a uv curing lamp for 2-5 minutes so as to be completely cured, thereby ensuring that the bundle structure is maintained during tapering;
step three: placing the quartz capillary 3 and the optical fiber group bundle on a tapering platform of a fused tapering system, and clamping the two quartz capillaries 3 by using a tapering machine clamp;
step four: the single-wavelength continuous power laser is connected to one end of an inner single-mode fiber 1, and the other ends of the inner single-mode fiber 1 and the outer three single-mode fibers 1 are respectively connected to an optical power meter;
step five: and (3) tapering is carried out by adopting a fused tapering system, the tapering part is a bare fiber part between the two quartz capillaries 3, and the tapering termination time is determined according to the monitoring result of the optical power meter.
In the third step, before the quartz capillary 3 and the optical fiber bundle are placed on the tapering platform of the fused tapering system, the bare fibers between the two quartz capillaries 3 are twisted, and the relationship between the twisting angle θ and the bare fiber length Ls must be satisfied: θ/Ls <5 °, where Ls is in mm. While the twist angle does not substantially affect the average output performance of the device, too much twist can damage the fiber bundle structure, and too much twist can increase the radial preload of the outer fiber to the inner fiber, resulting in breakage of the middle fiber.
In the fifth step, a fusion tapering machine is used for tapering, and the hydrogen flow is selected to be 120-180 ml/min during tapering, and the excessive melting of the optical fiber bundle can affect the performance of the manufactured device due to the fact that the optical fiber is directly heated. The stretching speed is 50-80 mu m/s, on one hand, the fiber core is easy to break during melting, on the other hand, the fiber bundles of the middle heating part are stretched to two sides to form cone areas without being thoroughly fused together due to the fact that the stretching speed is too high, the fusion degree of the fiber is too low, the optical power coupling efficiency is greatly reduced, the effect of optical power coupling can be achieved only by stretching more distances, and the additional loss of a device can be increased along with the increase of the stretching distance, so that the stretching speed is controlled in the range.
Further, during the tapering process, the optical power meter is continuously monitored, and as the stretching distance increases, the optical power starts to be transferred from the middle optical fiber to the outer three single-mode optical fibers 1. It can be seen that the optical power of the inner fiber core is continuously reduced until the total output optical power is less than 5%, and the tapering is stopped when the output optical power of the outer three single-mode optical fibers 1 reaches 31.6% -35% of the total output power at the same time.
Further, the diameter of a single optical fiber cladding in a middle melting zone after tapering is 38-43 μm, the length of the melting zone is 4-7 mm, the lengths of two side conical zones are 10-15 mm, the length of the melting zone is generally the same as the width of a fire head, the length of the conical zone is equal to the length of actual stretching, the structure of a first bare fiber bundle 6 after tapering is shown in fig. 4, w is the length of the middle melting zone, L is the length of the two side conical zones, and the outer side is an un-stretching zone. And at the moment, the 1 multiplied by 3 light beam splitter can be manufactured after the cone pulling packaging is finished. Fig. 7 shows that when the fiber bundle is twisted at different angles during tapering, the output uniformity of the device is good when the torsion angle is from 0 to 150 degrees, and the effect of the torsion angle is not received, so that the torsion at different angles does not affect the uniformity performance of the prepared coupler, and the preparation tolerance of the device is also large.
The basic structure and the parameter composition of a specific embodiment of the present invention are listed below.
The cladding diameter of the single-mode optical fiber 1 is 125 μm, and the core diameter is 8.3 μm. The cladding diameter of the coreless fiber 2 is 125 μm, and the refractive index of the coreless fiber 2 is lower than that of the single-mode fiber 1. The inner layer is a single-mode fiber 1, the outer layer is formed by arranging three single-mode fibers 1 and three coreless fibers 2 at intervals, and the central connecting lines of the adjacent three fibers form a regular triangle. The inner diameter of the quartz tube of the outer sleeve is 380 mu m, the thickness of the quartz tube is 200 mu m, and the length of the quartz tube is 1.5cm, and the quartz tube consists of pure quartz. The two quartz tubes are respectively arranged at two sides of the bare fiber area of the optical fiber bundle, uv glue is dripped at two sides of the quartz tubes, the quartz tubes are continuously irradiated for 2 minutes and fixed by a uv curing lamp, and the bare fibers between the two quartz tubes are 30000 mu m, and the torsion angle is 1 DEG/mm. The light source is 1550nm continuous power laser, the hydrogen flow is 150ml/min, the stretching speed is 50 mu m/s, the diameter of the cone region cladding is 42 mu m after the cone drawing is finished, the length of the melting region is 6000 mu m, and the lengths of the cone regions at two sides are 13000 mu m. The 1×3 optical beam splitter prepared in this example can realize a splitting ratio of 1:1:1, and the output spectrum is shown in fig. 6, the operating bandwidth is approximately 70nm.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The 1X 3 optical beam splitter is characterized by comprising an optical fiber group and two quartz capillaries, wherein the two quartz capillaries are axially spaced at a certain distance, the optical fiber group passes through the two quartz capillaries, the optical fiber group comprises an inner layer optical fiber and six outer layer optical fibers, and the six outer layer optical fibers are uniformly distributed along the circumferential direction by taking the inner layer optical fiber as the center; the inner layer optical fibers are single-mode optical fibers, the six outer layer optical fibers comprise three single-mode optical fibers and three coreless optical fibers, and the single-mode optical fibers and the coreless optical fibers are arranged at intervals one by one; the optical fiber bundles inside the two quartz capillaries and the optical fiber bundles between the two quartz capillaries are bare fibers, the optical fiber bundles between the two quartz capillaries are first bare fiber bundles, the quartz capillaries and the optical fiber bundles form a beam splitter after tapering, tapering occurs in the middle part of the first bare fiber bundles, the first bare fiber bundles are sequentially a middle melting area, two side tapering areas and an outer unstretched area from the middle to the two ends after tapering, an inner layer single mode fiber at one end of the beam splitter is an input end, three outer layer single mode fibers at the other end of the beam splitter are output ends, and the input end and the output end are both positioned outside the quartz capillaries.
2. The 1 x 3 optical splitter of claim 1, wherein the coreless fiber has a cladding diameter equal to the diameter of the single mode fiber.
3. The 1 x 3 optical splitter of claim 1, wherein the coreless fiber has a cladding index of refraction less than or equal to the cladding index of the single mode fiber.
4. The 1 x 3 optical splitter according to claim 1, wherein the inner diameter ds of the quartz capillary and the diameter dg of the bare fiber satisfy: and ds-3dg is more than or equal to 5 mu m and less than or equal to 10 mu m.
5. The 1 x 3 beam splitter of claim 1, wherein the fiber bundle is secured to the quartz capillary tube with uv glue prior to tapering.
6. The 1 x 3 beam splitter according to claim 1, wherein the quartz capillary tube has a wall thickness of 200 to 300 μm and a length of 1 to 3cm.
7. A method of processing a 1 x 3 beam splitter according to claim 1, comprising:
step one: the areas inside the quartz capillaries and between the two quartz capillaries are bare fiber areas, the coating layer of the part of the optical fibers corresponding to the bare fiber areas in the optical fiber group is stripped, and the optical fibers are wiped by alcohol cotton balls;
step two, a step two is carried out; passing an optical fiber group bundle through a quartz capillary, wherein uv glue is adopted to fix the optical fiber group bundle and the quartz capillary;
step three: placing the quartz capillary and the optical fiber group bundle on a tapering platform of a fused tapering system, and clamping the two quartz capillaries by using a tapering machine clamp;
step four: the single-wavelength continuous power laser is connected to one end of an inner layer single-mode fiber, and the other ends of the inner layer single-mode fiber and the outer layer three single-mode fibers are respectively connected to an optical power meter;
step five: and (3) tapering by adopting a fused tapering system, wherein the tapering part is a bare fiber part between two quartz capillaries, and the tapering termination time is determined according to the monitoring result of the optical power meter.
8. The method of claim 7, wherein in the third step, before the quartz capillary tube and the optical fiber bundle are placed on the tapering platform, the bare fiber between the two quartz capillary tubes is twisted, and the relationship between the twisting angle θ and the bare fiber length Ls is satisfied: θ/Ls <5 °, ls is in mm.
9. The method of processing a 1×3 optical beam splitter according to claim 7, wherein in the fifth step, a fused tapering system is adopted for tapering, the flow rate of hydrogen is 120-180 ml/min, the drawing speed is 50-80 μm/s, the diameter of a single optical fiber cladding in a middle fused region after tapering is 38-43 μm, the length of the fused region is 4-7 mm, and the lengths of two tapered regions are 10-15 mm.
10. The method according to claim 7, wherein the tapering is stopped when the output power of the inner layer single mode fiber reaches less than 5% of the total output power and the output end optical powers of the outer layer three single mode fibers reach 31.6% -35% of the total output power in the tapering process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310437178.1A CN117492139A (en) | 2023-04-20 | 2023-04-20 | 1X 3 light beam splitter and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310437178.1A CN117492139A (en) | 2023-04-20 | 2023-04-20 | 1X 3 light beam splitter and processing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117492139A true CN117492139A (en) | 2024-02-02 |
Family
ID=89677047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310437178.1A Pending CN117492139A (en) | 2023-04-20 | 2023-04-20 | 1X 3 light beam splitter and processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117492139A (en) |
-
2023
- 2023-04-20 CN CN202310437178.1A patent/CN117492139A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5782104B2 (en) | Method and apparatus for low loss, mode field matched coupling to multi-core fiber | |
| US5664037A (en) | Multi-neckdown fiber optic coupler | |
| US6823117B2 (en) | Mode multiplexing optical coupling device | |
| CA2523930A1 (en) | Method of making fiber optic couplers with precise positioning of fibers | |
| JPH11278860A (en) | Production of fused fiber bundle and device therefor | |
| JPH0224607A (en) | Manufacture of optical multiplexer/demultiplexer | |
| EP0635140B1 (en) | One by eight optical fiber coupler | |
| CN101866032A (en) | Signal light combiner and fabrication method | |
| AU700855B2 (en) | Low loss fiber optic coupler and method | |
| CN109683240A (en) | A kind of optical-fiber bundling device and preparation method thereof | |
| US6731842B2 (en) | Microbend fused fiber coupler method and apparatus | |
| CN117492139A (en) | 1X 3 light beam splitter and processing method thereof | |
| CN104345388B (en) | A kind of large core fiber coupler and preparation method thereof | |
| JPS6114489B2 (en) | ||
| JPH07253518A (en) | Production of star coupler and star coupler | |
| US20230138454A1 (en) | Multicore fiber stubs, multicore fan-in, fan-out devices, and methods of fabricating the same | |
| JP2800601B2 (en) | Manufacturing method of optical fiber coupler | |
| CN117666030A (en) | Optical fiber end-face pump-signal coupler, preparation method and application | |
| JPH06148461A (en) | Manufacture of optical fiber coupler | |
| CN112965170A (en) | Method for preparing optical fiber mode selective coupler by using glass sleeve | |
| JPH0193707A (en) | Optical fiber coupler | |
| JP2000304963A (en) | Multi-branch optical coupler | |
| JPH02242204A (en) | Optical fiber coupler | |
| JPS60150012A (en) | Optical star coupler and its manufacture | |
| JPH11167041A (en) | Multi-branch optical coupler |
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 |