CN203337856U - Fiber coupler - Google Patents
Fiber coupler Download PDFInfo
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- CN203337856U CN203337856U CN2013203270728U CN201320327072U CN203337856U CN 203337856 U CN203337856 U CN 203337856U CN 2013203270728 U CN2013203270728 U CN 2013203270728U CN 201320327072 U CN201320327072 U CN 201320327072U CN 203337856 U CN203337856 U CN 203337856U
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- shaping element
- fiber coupler
- fiber
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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
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2848—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers having refractive means, e.g. imaging elements between light guides as splitting, branching and/or combining devices, e.g. lenses, holograms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
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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
- G02B6/26—Optical coupling means
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
Abstract
A fiber coupler is provided with a plurality of input fibers (6), and each input fiber guides an input light beam (16) emitted by adjacent emission terminals (5); the fiber coupler also comprises a main machine (4) connected with the adjacent emission terminals (5) and a plurality of light beam forming elements (13) embedded in the main machine (4); the light beam forming elements (13) have local changing refractive index and the number of the light beam forming elements (13) is equal to that of the input fibers (6); each light beam forming element (13) is acutely positioned on downstream of the emission terminal (5) of the input fiber (6); the input light beam (16) emitted by the emission terminal (5) is served as output light beam (17); compared with the corresponding input light beam (16), the output light beam (17) is widened and provided with small divergence angle; and the output light beams (17) form common ray light beams (18).
Description
Technical field
The utility model relates to a kind of fiber coupler with many input optical fibres, input beam of its each bootstrap, and by adjacent ejaculation terminal emission input beam, wherein, described fiber coupler guiding input beam, and the emission output beam, both are in conjunction with forming a common ray optical cable.
Background technology
This fiber coupler can carry out to the input beam of a plurality of input optical fibres the geometry coupling, and for example its coupling process can be: stretch and the fusion input optical fibre.In order to realize the high brightness of common ray optical cable, can increase the ratio of outgoing side coupling mechanism core diameter and input optical fibre overall diameter, described in EP2071376A1.Perhaps amplify to import the ratio (US2010/0278486A1 of input beam Mo district's diameter and coupling mechanism core diameter in input optical fibre, US2010/0189138A1), here the multiple-factor input optical fibre is stretched and while being tapered, the refractive index structure that needs 3 kinds of complexity, to reach the high brightness purpose.
The utility model content
The purpose of this utility model just is to provide a kind of fiber coupler thus, its input beam by a plurality of input optical fibres transfers in the common ray optical cable of output beam, this common ray optical cable possesses the characteristic of high brightness, and the brightness of each output beam meets the brightness of input beam as far as possible.
This purpose is resolved by a fiber coupler with many input optical fibres, a main frame and a plurality of embedded beam-shaping elements.Input beam of each bootstrap in many input optical fibres, and by adjacent ejaculation terminal emission input beam; Main frame and adjacent ejaculation terminal are connected to each other; Embed a plurality of beam-shaping elements in main frame, it has the locally variable refractive index.Wherein the number of beam-shaping element equals the number of input optical fibre, each beam-shaping element is fitly arranged and is formed according to the ejaculation terminal of input optical fibre, and will as output beam, launch from the input beam of ejecting end, and this output beam is compared with corresponding input beam and has been widened, and have a less angle of divergence, output beam forms a common ray optical cable like this.
By this fiber coupler, can realize on the one hand how much couplings of output beam when our desirable common ray optical cable reaches the optimal brightness state; Only have on the other hand the brightness of indivedual light beams to worsen slightly to some extent, addressing is used separately indivedual input beams in common ray optical cable separately as required.
Common ray optical cable can highly-filled phase space, due to addressable output beam separately, and specific aim beam-shaping on upper space of its permission time.Therefore, for example can personalized preset position and the light beam parameters of each output beam.The highly-filled of phase space is characterised in that: be no matter that separate few size with segment beam in angular distribution in position distribution little, make position distribution and angular distribution product in the ray optical cable reduce as far as possible.Therefore, this phase place is filled to the good focusing of common ray optical cable that we are familiar with.
The input optical fibre of the fiber coupler of developing according to the utility model, by special one-tenth basic mode or low mode fiber.
Input optical fibre, particularly including fibre core with around the fibre cladding of fibre core (preferably homogeneous refractive index section bar), adopts the familiar light beam introduction method of people simultaneously.
Likely by various beam-shaping elements, process respectively corresponding input beam by the fiber coupler in the utility model.Therefore, for example can impel every output beam to reach different focus points, then by these output beams, form common ray optical cable.
Fiber coupler in the utility model can also supplement one or more other input optical fibres, at this moment in these input optical fibre back, does not arrange main frame beam-shaping element.Replace, for example in one or more input optical fibre back, arrange main frame light beam introducing element.In addition, also can by other a input optical fibre or other many input optical fibres at least one through main frame.
Fiber coupler described in the utility model can connect main frame directly or indirectly by penetrating terminal.Especially input optical fibre and ejaculation terminal can be embedded in a fiber body, and this fiber body is connected with main frame.This fiber coupler at least comprises two parts (also: the component-embedded main frame of beam-shaping, the embedded ejecting end sub-optical fibre of input optical fibre body), and these two parts are connected to each other, for example: can realize interconnecting by composition surface.Contrast conventional fiber coupler, this point manifests its advantage part, uses large-sized single component, and allows to carry out convenient disposal, does not need to draw and stretches technique, has so just increased the security of technique.
In fiber coupler in the utility model, each penetrates on terminal has an end face, and all end faces all are positioned at same plane.So just, form a plane, from this plane, launched input beam.Simplified like this production run of fiber coupler.
Residing this plane of end face can be vertical with the axis of main frame, but also can out of plumb aim at the axis of main frame.
In addition, when the beam-shaping element forms, it is positioned at same plane towards the face of injecting that penetrates terminal.Or the beam-shaping element that replaces also can be positioned at a plane away from the outgoing plane that penetrates terminal.Inject face and (or) the residing plane of outgoing plane can perpendicular alignmnet or out of plumb aim at main engine axis.Inject the position that preferably is parallel to each other, the residing plane of face and outgoing plane.In addition, penetrate the end face of terminal and the residing plane parallel of the face of injecting of beam-shaping element, and (or) and the residing plane parallel of outgoing plane of beam-shaping element.
In addition, the face of injecting of beam-shaping element and (or) outgoing plane, not only can form plane, and can there is curve form.
In addition, image-forming component at least should be arranged on the front and back position of a beam-shaping element, for example lens.These lens can be embedded in main frame.
In the beam-shaping element, the direction of propagation that locally variable refractive index curve preferentially tends to traverse imported input beam, therefore preferentially tend on whole xsect to a great extent.
In fiber coupler of the present utility model, each beam-shaping element is launched output beam, and with the corresponding input beam of injecting on main frame, to compare expansion larger for it, and disperse less.This light beam is widened and is dispersed the restriction that reduces to be subject to especially the beam-shaping element.In order to reduce dispersing of output beam, at this beam-shaping element, brought into play lens effect.This lens effect is designated hereinafter simply as focusing or focusing, with there be dispersing increase or reducing of being associated simultaneously, has nothing to do.
In addition, in fiber coupler of the present utility model, each beam-shaping element has constant xsect in the vertical.Brightness with input beam is compared, and this is conducive to keep output beam brightness, or output beam brightness is slight deterioration.
At least form one in the beam-shaping element as gradient index element (preferably whole).Therefore, can realize safely desired beam spread and disperse minimizing.Formation gradient index element is conducive to it and has smooth critical surface.Make like this production run be simplified, connect other elements and become convenient.
For example: the gradient index element can form a multimode optical fiber, and it can not mate input beam with respect to basic mode, and therefore, multimode optical fiber has been applied in a non-matching basic mode when the guiding input beam.
Have one in the beam-shaping element at least and can form focusing.Particularly all beam-shaping elements can form focusing.Yet each beam-shaping element also likely has different focus characteristics, or other different optical characteristics (for example imaging performance).In addition, the shape of cross section difference of beam-shaping element.It is mainly to penetrate between terminal and beam-shaping element and has 1:1 array correspondence relation, thereby makes each the ejaculation terminal back beam-shaping element of optimizing that sorted.Can realize in the following manner especially this 1:1 array correspondence relation: we have formed first pattern from the adjacent ejaculation terminal of vertical view observation and have become the beam-shaping element, and first pattern is identical or similar to second pattern.
Similarly we need to understand especially: from plan view observation, each penetrates terminal and affiliated beam-shaping element and is at least and partly overlaps.
In addition, these two patterns reverse mutually around the imaginary axis perpendicular to overlooking face, and output beam presents the fried dough twist shape like this.
Under any circumstance, the central axis that the fiber coupler in the utility model can be designed as the beam axis of input beam or penetrates terminal overlaps with the central shaft of beam-shaping element or is parallel.In addition, a kind of intermediate input optical fiber can also appear, and mutual aligned twisted pattern has appearred round this intermediate input optical fiber, there is the corresponding output beam of intermediate input optical fiber in the middle of so common output optical cable, and externally in zone, there is the distortion light beam.
In vertical view, we can observe the beam-shaping element especially likely than penetrating terminal close-packed arrays more.Although this may cause some energy losses, the phase space filling can improve, and the output optical cable can turn on a point.
Certainly, fiber coupler in the utility model is except comprising a beam-shaping element with locally variable refractive index, at least also possesses a beam-shaping element, it is not to possess by whole variable diameter refractive index, but for example be similar to input optical fibre, wherein contain fibre core and covering.This beam-shaping element for example can be referred in other input optical fibre.At least also have another one beam-shaping element with the refractive index of limited locally variable will but may not cause beam spread and disperse minimizing.
In fiber coupler of the present utility model, from xsect observation, have at least a beam-shaping element (especially all beam-shaping elements) to there is the refractive index distribution shape reduced gradually from inside to outside.Particularly refractive index can be also parabolic shape or approximate parabolic distribution curve.
Each beam-shaping element can have one and inject face, and each penetrates terminal can have an end face; Wherein the end face of the face of injecting of each beam-shaping element and affiliated ejaculation terminal is in direct contact condition.Therefore, input beam can form good coupling with the beam-shaping element reliably.Injecting face and end face for example can interconnect by bonding technology (as thermal diffusion).
Replace, between ejaculation terminal and beam-shaping element, fiber coupler also can have a spacer.Spacer can with the ejaculation terminal of main frame and input optical fibre (embedding the fiber body that penetrates terminal), (for example passing through bonding) be connected with each other.Advantage thus: when light is injected the beam-shaping element, compare that transmitted intensity weakens or power density reduces with directly contacting.Both can reduce the disturbing effect caused under the high strength condition by this, can reduce again that the desirable refractive index distribution curve of beam-shaping element departs from and the adverse effect that may cause.In addition, when selecting the beam-shaping element (particularly in order to proofread and correct output beam), increased dirigibility.
Fiber coupler in the utility model just can have one and be arranged in after the beam-shaping element and be connected to for example, spacer on main frame (passing through bonding).
Single or multiple spacers can be formed by the adaptive material manufacture of high power.In addition, have at least a spacer should at least there is the curved surface spacer surface of main frame (for example away from), and the corresponding optical characteristics relevant with surface configuration is provided, for example supplement and focus on.
In addition, the spacer sorted later at main frame has enough large thickness, makes output beam that obvious diffusion phenomena occur, so spacer has been brought into play so-called end cap function.
For example: a spacer can be installed respectively in the both sides of main frame.When having identical characteristic, just embodied two spacers in this case advantage, due to the displacement phenomenon that can prevent so common ray optical cable Beam End; On the contrary, when a spacer only is installed, just this phenomenon may occur.
Fiber coupler in the utility model can be equipped with the concentrating element of sequence in the main frame back.Particularly being equipped with this concentrating element can make common ray optical cable produce focusing.Concentrating element as the gradient index element and (or) at least there is curved surface and form, it preferentially for example, directly contacts with preposition element (main frame).
In fiber coupler of the present utility model, optical fiber can be directly connected to or be connected with main frame outgoing side terminal by spacer, and common ray optical cable is coupled to optical fiber.Certainly, fiber coupler also can separate with optical fiber, has produced like this one section free beam path between the outgoing side terminal of main frame and optical fiber.Can arrange one or more optical elements while needing on this section free beam path.
Fiber body and (or) main frame can the multiple kapillary of each self-forming, its for separately inject terminal or beam-shaping element separately has been equipped with corresponding aperture.Yet, inject terminal member and (or) the beam-shaping element also likely has certain gabarit, own dense accumulation is got up.Such as: they can have rectangle, square, hexagon. wait appearance profile.
Inject terminal preferential directly and (or) by fiber body, be welded to each other.Same beam-shaping element can be directly with (or) by main frame, be welded to each other.
Preferentially by bonding technology, fiber body and main frame are connected with each other, for example: by thermal diffusion.The material fusion process that causes the contact point loose contact while having avoided like this connecting.
Main frame is connected bonding technology with fiber body and has advantage, because the characteristic of fiber body and main frame can not be greatly affected.Wherein special reason is that bonding is different from fusion, and it can carry out construction under large tracts of land low temperature.
Therefore, fiber body and main frame can carry out prefabricate and pretest, then by bonding, it are interconnected.This will simplify fiber body and main frame production and processing.
Fiber coupler in the utility model is specially adapted to the material laser processing field, for example metal works cutting or welding.
Fiber coupler in the utility model also can further have the beam direction element.Particularly for example every input optical fibre or each beam-shaping arrangements of components beam direction element.The beam direction element can be ordered between the ejaculation terminal of input optical fibre and beam-shaping element and (or) beam-shaping element back.In addition, the beam direction element can be arranged in arbitrarily on spacer, or embeds wherein.The beam direction element also can embed fiber body and (or) in main frame.
Fiber coupler in the utility model can have a kind of beam direction additional structure, this structure by main frame or may the time by fiber body, extend, light transmitting fiber for example.In addition, on main frame or when possible, on optical fiber, there is through hole, wherein can apply beam direction structure, for example light transmitting fiber.
In addition, when producing, fiber coupler needs a step, input optical fibre and to penetrate terminal adjacent one another are and be fixed on fiber body, make the ejaculation terminal form the first pattern in vertical view, beam-shaping element with the locally variable refractive index is fixed on main frame, make it form the second pattern in vertical view, wherein, described fiber body and main frame alignment relative and then be merged together, so we see in vertical view, each overlaps with penetrating at least with one beam-shaping componentry of terminal.
By this manufacture method, can reduce the manufacturing cost of (comprising its follow-up research and development) of fiber coupler in the utility model, and can reach high precision.
In order to be fixed in fiber body, penetrate terminal can be directly with (or) by fiber body, merge each other.Equally, the beam-shaping element is fixed on main frame and (or) while merging each other by main frame, be also to adopt to use the same method.This fusion process is carried out before being preferably in fiber optic splicing and main frame.
Fiber body and chiller priority adopt bonding process to interconnect, for example: by thermal diffusion.
Fiber body and (or) main frame can form capillarity, it for each, injects terminal or each beam-shaping element has formed corresponding through hole.Both in same multiple kapillary multiple kapillaries in forming more among a small circle by minute defection particularly.
First and second pattern can be identical (for example: each other cover) or similar.
Fiber body and main frame can be in alignment with each other, and these two patterns overturn each other.This may cause input beam that tangential deflection occurs, thereby has caused the distortion of optical axis.In addition, both can be aligned with each other, and in each situation, the central shaft of input beam can not be interfered when entering the beam-shaping element be associated.
Two patterns can be similar, but variable-scale each other, this may cause the radial deflection of input beam optical axis.
Can also comprise other steps in the method, for this step, we will further discuss with fiber coupler of the present utility model jointly.
It is reported, above-mentioned characteristic and those are the still combination of unaccounted feature shown in not only can be applicable to below, and can be applied in other combination or use separately, also can not break away from scope of the present utility model.
The accompanying drawing explanation
For example, in following accompanying drawing, we understand necessary functions more of the present utility model in more detail:
The first case study on implementation skeleton view that Fig. 1 is fiber coupler in the utility model;
The decomposition view that Fig. 2 is the fiber coupler in Fig. 1;
The vertical view of the surface of contact 9 that Fig. 3 a is fiber body 3;
Fig. 3 b is the side view according to Fig. 3 a;
The vertical view that Fig. 4 a is main frame 4 end faces 15;
Fig. 4 b is the side view according to Fig. 4 a;
The decomposition diagram that Fig. 5 is another case study on implementation of fiber coupler in the utility model;
The decomposition diagram that Fig. 6 is another case study on implementation of fiber coupler in the utility model;
The decomposition diagram that Fig. 7 is another case study on implementation of fiber coupler in the utility model;
The decomposition diagram that Fig. 8 is another case study on implementation of fiber coupler in the utility model;
The decomposition diagram that Fig. 9 is another case study on implementation of fiber coupler in the utility model;
The decomposition diagram that Figure 10 is another case study on implementation of fiber coupler in the utility model;
Figure 11 is planimetric map, means the another kind of outline of incident member and/or beam-shaping element;
Figure 12 is planimetric map, means the another kind of outline of incident member and/or beam-shaping element;
The decomposition diagram that Figure 13 is another case study on implementation of fiber coupler in the utility model;
The schematic sectional view that Figure 14 is another case study on implementation of fiber coupler in the utility model;
Figure 15 is schematic diagram, the possible single impact of each input beam in the main frame of fiber coupler in explaination the utility model.
Embodiment
Fig. 1,2 shows the first case study on implementation of fiber coupler 1 in the utility model, and wherein Fig. 1 is perspective schematic view, and Fig. 2 is the decomposition view of Fig. 1, is used for explaining in more detail the structure of fiber coupler.
The diameter of fibre core 10 is between 10 and 25 microns, and the diameter of fibre cladding is between 100 microns and 250 microns.
It is as follows that parabolical refractive index is calculated formula:
Wherein: in this case, n
ofor the refractive index of fiber axis, a is fiber core radius, and r is the radial distance with fiber axis, and
N wherein
ait is the refractive index of beam-shaping element 13 outer edge.In described case study on implementation, the twice of the fibre core a radius that the diameter of beam-shaping element is corresponding.
For ease of key diagram 1 and Fig. 2, only with label 12, indicated a through hole on main frame 4, only with label 13, indicated a beam-shaping element.
The functional mode of the fiber coupler 1 in the utility model is as described below.
Be introduced into input beam 16 in each input optical fibre 6, as shown in arrow in Fig. 1 and Fig. 2.The input beam 16 of every input optical fibre 6 is as the input beam 16 directive front end faces 8 of dispersing, as shown in Fig. 3 b.The front end face 8 of the input beam 16 direct directive main frame 4 beam-shaping elements 13 that send.Each beam-shaping element 13 causes the light beam expansion, has reduced the angle of divergence simultaneously, in embodiment described herein, is designed to, and the output beam just in time just emitted from the beam-shaping element is collimated light beam 17, as shown in Fig. 4 b.The collimation output beam 17 of seven beam-shaping elements 13 forms common ray optical cable 18, and it leaves fiber coupler 1 as shown in FIG. 1.
The for example relatively demonstration in Fig. 3 b, Fig. 4 b, with the state at once after the input beam 16 of input optical fibre 6 is exported coupling, compare, as Fig. 3 b, the phase space compactedness of all output beams 17 is better, although this is because each beamlet diameter of output main beam has had increase, and the space length of segment beam has kept parallel, but the dispersing showing and reduce of output main beam this part light beam.In this better alternate filling stage, in view of the application of beam-shaping element 13, by common ray optical cable 18, the brightness of every output beam 17 is compared and is degenerated to such an extent that do not showing with the brightness of corresponding input beam 16.This has just generated a common high brightness ray optical cable.
The design of fiber coupler 1, make the input beam 16 that emits from input optical fibre 6 continue significantly to illuminate beam-shaping element 13 in outgoing one side, and don't can make light beam show to be subject to edge effect impact (for example crooked).
Only should be understood to an example in the extension shown in Fig. 4 b, relate to the situation of beam-shaping element 13 as the GRIN multimode optical fiber.
Here, in described case study on implementation, the front end face 8 of input optical fibre 6 forms direct optics with beam-shaping element 13 and contacts, and wherein, described input optical fibre 6 matches at the axle of contact point and beam-shaping element 13.
We when producing fiber coupler 1, by bonding technology, as at two end faces 9 with after 14 contacts, realize that by thermal diffusion direct optics contacts.Its advantage is for the manufacture of the optics contact, to be not necessary splicing, and this point is usual in optical fiber technology.Therefore the melting process be associated with splicing also can be avoided effectively.
Especially can be by fiber body 3 and input optical fibre 6; Main frame 4 and beam-shaping element 13 are prefabricated as the element group, then are coupled, and tend to adopt the mode of binding.
Input optical fibre 6 embeds fiber body 3; The same main frame 4 that embeds of beam-shaping element 13, polished end faces, thus make end face and the beam-shaping element 13 that input optical fibre 6 is relative not need additional materials to get final product binding.
For example, can first manufacture the blank of a blank for the prefabricated elements group, set through hole according to through hole 7 and 12 on it, and longer than fiber body 3 and main frame 4 on the direction of through hole, this blank can be quartz glass and makes, then be separated into corresponding quartz glass plate separately, length on its through hole direction is according to fiber body 3 and main frame 4 and determine, or over its size, for example, required length and corresponding end face can turn to or the beam-shaping element is realized by grinding, cutting or cracked program together with integrated input optical fibre, light beam.
Input optical fibre 6 is introduced into fiber body 3 and is heated by described mode, can just be sitting on through hole 7.Can obtain surface of contact 9 by grinding, cutting or cracked program.In view of input optical fibre 6 is arranged in hole 7, can minimizes the desired position skew of avoiding in heating process, thereby improve machining precision.
We implant beam-shaping element 13 in the same way main frame 4 and merge with it.Beam-shaping element 13 can have identical diameter with input optical fibre 6, and is arranged in identical pattern (fiber body and main frame 3,4 need in conjunction with the vertical view of end face).
While producing main frame, also can use light beam to turn to and/or the long blank of beam-shaping element assembling, then be separated into a plurality of such main frames.
Each self-forming hollow structure of the blank of optical fiber and main frame 3,4, transversely arranged input optical fibre 6 and beam-shaping element 13.In order to connect optical fiber and main frame 3,4, it must relatively laterally align with longitudinal axis, is rotated in case of necessity.The optical fiber of arranging like this and main frame 3,4 be connected with each other (for example passing through binding).Can guarantee by this optics contact good between input optical fibre 6 and beam-shaping element 13, thereby guarantee that all incident beams 16 enter affiliated separately beam-shaping element 13, and coupling loss is very low.
Beam-shaping element 13 is embedded in the hollow structure that blank provides for main frame 4, forms lens arra, the front end face 8 of the ejaculation terminal 5 of the input optical fibre 6 embedded in the corresponding fiber body 3 of this array.
As described in, this causes output beam 17 encapsulation physically showing more intensive than incident beam 16, simultaneously, the beam quality of every output beam 17 about equally, is equal to the quality of input beam 16.The diameter of beam-shaping element 13 length directions is constant.
The fiber coupler 1 formed like this can be known as a monolithic coupling mechanism 1, and optical fiber and main frame 3,4 have formed in coupling mechanism 1 coupling body 2 cutting apart on the direction of propagation, and are optically coupled by described mode.
In view of the same input optical fibre of fiber body 3 one side, on the other hand, main frame 4 can be made as the element group separately in advance with beam-shaping element 13, and is being connected with each other subsequently, and we can be checked or control after producing the element group.For example can check whether it exists required optical property.Only, when this point is set up, these two element groups for good and all could be connected together.Therefore, the fiber coupler 1 formed so just can have required performance, and the rejection rate of manufacture just can be lower.
Except producing main frame 4 according to described mode, also can produce a plurality of main frames, for example manufacture the quartz glass blank, its through hole had should meet through hole 12, and longer than main frame to be produced on the direction of through hole.Then, insert the GRIN multimode optical fiber in hole, process blank, inserted GRIN multimode optical fiber is matched with the shape in hole, thereby obtain desired optical fiber and the interlocking between hole.Afterwards, blank is for example, by the length section of being separated into (cutting) of the main frame 4 according to be produced, if need and/or be necessary, though the end face of the GRIN multimode optical fiber of polishing afterwards.For the desired length of main frame coupling mechanism expection character, Computer-Assisted Design, Manufacture And Test program that can be suitable is guaranteed.
By this way can prefabricated a plurality of main frames 4 and beam-shaping element 13.
As shown in Figure 1 and Figure 2, common ray beam 18 can be separated coupling, becomes light beam freely.For example, applied anti-reflection layer on the end surfaces 15 here.
In addition, also can be between optical fiber and main frame 3,4 arrangement interval support 19, as shown in the exploded view of Fig. 5.In the implementation case, we adopt and are denoted by like references identical element, to avoid that above-mentioned situation is carried out to unnecessary repetition.The advantage of such spacer 19 is that, when it runs into beam-shaping element 13, the angle of divergence of the input beam 16 of being launched by front end face 8 has been expanded radiation field.Therefore, the desirable index distribution of off-beams forming element 13 be can pass through, interference that high strength causes and potential negative effect reduced.
What Fig. 6 showed is the further modification of carrying out according to fiber coupler shown in Fig. 1 to Fig. 4 b.During modification, fiber coupler 1 also should have output block 20.Output block 20 output beam 17 of being responsible for gathering, superposeing, with a tight waist best the and intersection point of beam axis of the single output beam of common ray optical cable 18 overlaps.For example: output element 20 can be made by grin lens or quartz glass.The point of crossing of output block 20 output beams can be positioned at outside output block 20.This is equally applicable to single output beam with a tight waist of common ray optical cable 18.The intersection point here with a tight waist can be in air or on other spacer 21, as schematic diagram Fig. 7.Certainly, output block 20 also can make within the intersection point of output beam 17 is positioned at output block 20.For example, point of crossing can be positioned at the end face 22(Fig. 6 away from input optical fibre 6).This is equally applicable to single output beam with a tight waist of common ray optical cable 18.
Certainly, in for the described case study on implementation of fiber coupler 1 of the present utility model, it also can be incorporated into together.What therefore, in Fig. 8, show is the case study on implementation combination according to Fig. 5, Fig. 6.In addition, fiber coupler 1 can be furnished with optional spacer 21 according to Fig. 8, as shown in Figure 7.
What Fig. 9 showed is the distortion case of fiber coupler 1, and wherein, common ray beam 18 is directly coupled to light guide structure, in the optical fiber 23 here.Case study on implementation based on shown in Fig. 9, fiber coupler 1 comprises the output block 20 described in Fig. 6.But this is not enforceable.Here also can apply the every other case study on implementation of fiber coupler in the utility model, make common ray optical cable 18 direct-couplings enter light guide structure, as optical fiber 23.
If do not adopt twin-core fiber to manufacture optical fiber 23, also can use central cores and ring manufacture on every side, in each situation, one or more light beam of common ray optical cable 18 is coupled voluntarily.This beam direction can in the situation that core separate and carry out with ring.
In principle, optical fiber 23 can be also multi-core fiber, and wherein, the core of multi-core fiber can be included in every output beam 17 of common ray optical cable 18.
Remove described in Fig. 9 and direct-coupling optical fiber 23, also can be coupled by the free jet path.It can comprise arbitrarily image-forming component, the lens 24 as shown in schematic diagram Figure 10.
The end surfaces of the particular in coupling body (as optical fiber and main frame 3,4) is usually vertical with axis.Yet, also can have different angles.Its advantage is the reflection of avoiding unnecessary, also is beneficial to the use spectral filter.The end face of this inclination also usually is easy to process, and may cause the single light beam of common ray beam 18 to have different focal positions.
Input optical fibre 6 in case study on implementation described above, respectively has the xsect of a circle with beam-shaping element 13, embeds to be locked in fiber body and main frame 3,4(each can be called as kapillary) in.Perhaps input optical fibre 6 and beam-shaping element 13 also can have an xsect, and it allows direct interlocking basically, in order to the light beam generated can be embedded in a shell structure.Figure 11 has schematically shown the xsect of a rectangle, after it, is embedded in a corresponding shell mechanism 25.It in schematic diagram Figure 12, is hexagonal cross-section.
In addition, also can use different input optical fibres (for example, to there is different shape of cross sections and (or) sectional dimension).In this case, affiliated beam-shaping element 13 also has the shape and size of respective cross section.Beam coupler 1 in the utility model can be made according to required beam-shaping.
Except beam-shaping element 13 and input optical fibre 6, the fiber coupler 1 in the utility model can comprise at least one beam direction structure.Therefore, being embedded in main frame 4 can not be a central beam director element 13, but central authorities connect beam direction index structure 26, as shown in figure 13.Central index structure 26 guides to the input beam of central input optical fibre 61 the ejaculation terminal of fiber coupler 1.When the input beam 16 that enters beam-shaping element 13 is pump light, the central input beam 16 of input optical fibre 6 can be flashlight.If beam coupler 1 possesses spacer 19,21 or output element 20, photoconduction is preferably extended by this element to index structure 26 so.
The schematic sectional view that Figure 14 is fiber coupler 1 another case study on implementation in the utility model.
Introduce light beam interior in-core coupling at twin-core fiber 23 by beam direction element 27, output block 20 and spacer 21 in main frame 4 of central input optical fibre 6 '.
Perhaps, central input optical fibre 6 ', fully by fiber body 3, main frame 4, output block 20 and the spacer 21 that may exist, is set to the exit end of central optical fiber 6' the input end of double-core optical fiber 23.In this case, central optical fiber 6' preferably at least should merge with spacer 21.
We will pass through Figure 15 brief description below to the personal settings of top repeatedly explanation.For example, during the blank of personalized main frame 44 ' can with various beam-shaping elements 13 and (or) beam direction element n27 combines, as schematic diagram Figure 15.Here the beam direction element 27 of indication is the core of guide beam, and those do not have the light beam of core, and the generation as at isolated body of the ray is here similarly dispersed.The beam-shaping element 13 meaned in Figure 15 is shorter than main frame on part.Except the various elements combinations that exceed main frame length, from the beam direction element and (or) combination of different isolated component also provides the extra personalization may.This single spirality also is maintained in such case study on implementation, and in the main frame hole, applied combination demonstrates optics contact longitudinally.When using the main frame inner light beam is shaped and the beam direction element is such combined sequence to produce fiber coupler, be preferably in and apply it to blank and just carry out mechanical connection before, for example, according to the known technology of optical fiber technology, merged.
Claims (13)
1. a fiber coupler, is characterized in that, comprising:
Many input optical fibres (6), every guiding input beam (16), adjacent ejaculation terminal (5) sends described input beam (16);
One main frame (4), be connected with described adjacent ejaculation terminal (5); And
The beam-shaping element (13) of a plurality of embedding main frames (4), have the refractive index of localized variation,
Wherein, the quantity of described beam-shaping element (13) is equal to the quantity of described input optical fibre (6), each described beam-shaping element (13) accurately is positioned at the back of the described ejaculation terminal (5) of described input optical fibre (6), the described input beam (16) that described ejaculation terminal (5) penetrates is as output beam (17), its corresponding described input beam of contrast (16) is broadened, and there is the less angle of divergence
And wherein said output beam (17) forms common ray optical cable (18).
2. fiber coupler according to claim 1, is characterized in that, described input optical fibre (6) and ejaculation terminal (5) are embedded in fiber body (3), and it is connected with described main frame (4).
3. fiber coupler according to claim 1 and 2, it is characterized in that: when each described beam-shaping element (13) is launched described output beam (17), correspondingly spread when its contrast enters the input beam of described main frame (4), and there is the less angle of divergence.
4. fiber coupler according to claim 1, is characterized in that, each penetrates terminal (5) end face (8), and all end faces (8) all are positioned at a plane.
5. fiber coupler according to claim 1, is characterized in that, each described beam-shaping element (13) has constant xsect at length direction.
6. fiber coupler according to claim 1, is characterized in that, at least one described beam-shaping element (13) is designed to the gradient index element.
7. fiber coupler according to claim 1, is characterized in that, at least one described beam-shaping element (13) focuses on.
8. fiber coupler according to claim 1, is characterized in that, at least one described beam-shaping element (13), from the xsect angle, embodies the refractive index that therefrom mind-set reduces outward.
9. fiber coupler according to claim 1, it is characterized in that, the plane of incidence of each described beam-shaping element (13) and each described ejaculation terminal (5) have respectively an end surfaces (8), wherein, the plane of incidence of beam-shaping element (13) directly contacts to the end face of relevant ejaculation terminal (5) separately.
10. fiber coupler according to claim 1, is characterized in that, between described ejaculation terminal (5) and described beam-shaping element (13), spacer (19) arranged.
11. fiber coupler according to claim 1, is characterized in that, has the spacer (21) that is positioned at described beam-shaping element (13) downstream and is connected with described main frame (4).
12. fiber coupler according to claim 1, is characterized in that, concentrating element (20) is arranged in described beam-shaping element (13) back.
13. fiber coupler according to claim 1, is characterized in that, optical fiber (23) is connected with the output terminal of described main frame (4), and wherein, described common ray optical cable (18) is coupled together.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210209628 DE102012209628A1 (en) | 2012-06-08 | 2012-06-08 | Fiber coupler has input fibers having exit edge portion from which input ray is emitted as output beam which is expanded in comparison to input ray and provided with smaller divergence, such that output beam forms luminous beam |
| DE102012209628.0 | 2012-06-08 |
Publications (1)
| Publication Number | Publication Date |
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| CN203337856U true CN203337856U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203270728U Expired - Lifetime CN203337856U (en) | 2012-06-08 | 2013-06-07 | Fiber coupler |
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| CN (1) | CN203337856U (en) |
| DE (1) | DE102012209628A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106443886A (en) * | 2016-10-20 | 2017-02-22 | 南方科技大学 | Manufacturing method of fiber laser output head and fiber laser output head |
| JP2017219627A (en) * | 2016-06-06 | 2017-12-14 | 株式会社フジクラ | Combiner and laser system |
| JP2017219628A (en) * | 2016-06-06 | 2017-12-14 | 株式会社フジクラ | Combiner and laser system |
| CN107660168A (en) * | 2015-04-22 | 2018-02-02 | 大众汽车股份公司 | Joining Device And Joining Method |
| CN109387904A (en) * | 2017-08-11 | 2019-02-26 | 深圳朗光科技有限公司 | A kind of fiber laser combiner and its manufacturing method |
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| DE102014208435A1 (en) * | 2014-05-06 | 2015-11-12 | Siemens Aktiengesellschaft | Arrangement and method for layering a job layer |
| ES2922401T3 (en) * | 2014-08-13 | 2022-09-14 | Ipg Photonics Corp | Multi-beam fiber laser system, method and use |
| DE102015103127A1 (en) | 2015-03-04 | 2016-09-08 | Trumpf Laser- Und Systemtechnik Gmbh | Irradiation system for a device for additive manufacturing |
| DE102016222475A1 (en) * | 2016-11-16 | 2018-05-17 | Bayerische Motoren Werke Aktiengesellschaft | Method for welding components by means of multicore laser source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3218022C2 (en) * | 1981-05-13 | 1984-08-02 | Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | Optical device for multiplexing |
| JPH0735944A (en) * | 1993-07-19 | 1995-02-07 | Fuji Electric Co Ltd | Optical star coupler |
| US6404955B1 (en) * | 2001-07-03 | 2002-06-11 | Corning, Incorporated | System and method for fabricating arrayed optical fiber collimators |
| GB0211445D0 (en) * | 2002-05-18 | 2002-06-26 | Qinetiq Ltd | Fibre optic connector |
| US7076131B2 (en) * | 2002-09-25 | 2006-07-11 | Lucent Technologies Inc. | Precision two dimensional optical array |
| WO2009077637A1 (en) | 2007-12-14 | 2009-06-25 | Corelase Oy | Method and device relating to optical fibers |
| US8160415B2 (en) | 2009-01-27 | 2012-04-17 | Ipg Photonics Corporation | High power fiber laser system with high quality beam |
| WO2010120958A1 (en) | 2009-04-14 | 2010-10-21 | Ofs Fitel, Llc | Fiber based laser combiners |
-
2012
- 2012-06-08 DE DE201210209628 patent/DE102012209628A1/en not_active Ceased
-
2013
- 2013-06-07 CN CN2013203270728U patent/CN203337856U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107660168A (en) * | 2015-04-22 | 2018-02-02 | 大众汽车股份公司 | Joining Device And Joining Method |
| CN107660168B (en) * | 2015-04-22 | 2020-08-11 | 大众汽车股份公司 | Joining device and joining method |
| JP2017219627A (en) * | 2016-06-06 | 2017-12-14 | 株式会社フジクラ | Combiner and laser system |
| JP2017219628A (en) * | 2016-06-06 | 2017-12-14 | 株式会社フジクラ | Combiner and laser system |
| CN106443886A (en) * | 2016-10-20 | 2017-02-22 | 南方科技大学 | Manufacturing method of fiber laser output head and fiber laser output head |
| CN109387904A (en) * | 2017-08-11 | 2019-02-26 | 深圳朗光科技有限公司 | A kind of fiber laser combiner and its manufacturing method |
| CN109387904B (en) * | 2017-08-11 | 2020-10-02 | 深圳朗光科技有限公司 | Optical fiber laser beam combiner and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012209628A1 (en) | 2013-12-12 |
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Address after: The German blue Berg AICH Haarde Street No. 39 Patentee after: TRUMPF LASER GmbH Patentee after: JENOPTIK LASER GmbH Address before: The German blue Berg AICH Haarde Street No. 39 Patentee before: TRUMPF LASER GmbH & Co.KG Patentee before: Jenoptik Laser GmbH |
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