CN100541248C - A kind of laser-optical fiber coupling head - Google Patents

A kind of laser-optical fiber coupling head Download PDF

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Publication number
CN100541248C
CN100541248C CNB2007101775318A CN200710177531A CN100541248C CN 100541248 C CN100541248 C CN 100541248C CN B2007101775318 A CNB2007101775318 A CN B2007101775318A CN 200710177531 A CN200710177531 A CN 200710177531A CN 100541248 C CN100541248 C CN 100541248C
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CN
China
Prior art keywords
optical fiber
leveling board
laser
adjusting screw
coupling head
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Expired - Fee Related
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CNB2007101775318A
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Chinese (zh)
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CN101295056A (en
Inventor
房涛
郑光
毕勇
贾中达
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Beijing Phoebus Vision Optoelectronic Co ltd
Academy of Opto Electronics of CAS
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Beijing Phoebus Vision Optoelectronic Co ltd
Academy of Opto Electronics of CAS
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Priority to CNB2007101775318A priority Critical patent/CN100541248C/en
Publication of CN101295056A publication Critical patent/CN101295056A/en
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Abstract

The invention provides a kind of laser-optical fiber coupling head, comprise optical fiber access place, pedestal and regulating device; Described regulating device comprises leveling board, adjusting screw and magnet, wherein, access place of described optical fiber is connected to an end of described leveling board, between described leveling board and the described pedestal magnet is installed, described adjusting screw is passed described leveling board and is installed between described leveling board and the described pedestal; Have screw on the described leveling board, the screw thread on described screw and the described adjusting screw matches, and is useful on the groove of fixing described adjusting screw on described pedestal.The present invention adopts magnet to substitute original rubber ring, can overcome rubber ring because the defective that the aging degree of regulation that is brought reduces; Also have easy processing, quick detachable, advantage that degree of regulation is high.

Description

A kind of laser-optical fiber coupling head
Technical field
The present invention relates to a kind of laser-optical fiber coupling head, particularly a kind of laser-optical fiber coupling head that has novel tuner.
Background technology
Laser-optical fiber coupling head is a kind of device that is used for incident laser is coupled to optical fiber.Fig. 1 is the optical schematic diagram that laser coupled arrives optical fiber, as can be seen from the figure, the refraction of the laser process condenser lens 16 of incident converges to the inside of optical fiber 15, impinges perpendicularly on the center in optical fiber cross section under the optimal cases, realizes the purpose that laser transmits thereby reach by optical fiber.In this course, realize the accurate refraction of laser, should be noted that two problems: the one, the distance that accurately regulate condenser lens 16 and optical fiber 15 is so that the focal length of distance between the two and condenser lens 16 adapts; The 2nd, the angle that regulate 16 of incident laser and condenser lenses is so that incident laser can arrive the optimum coupling position of optical fiber 15 behind superrefraction.The effect of laser-optical fiber coupling head is exactly to realize the coupling process of above-mentioned laser coupled to optical fiber, and finishes the adjusting to angle and distance in coupling process.
Can know that from the function of laser-optical fiber coupling head the tuning precision of coupling head is a key of judging coupling head quality good or not and coupling efficiency height.Fig. 2 is the side view of laser-optical fiber coupling head common in the prior art, and as can be seen from the figure, this coupling head mainly comprises optical fiber access place 1, leveling board 2, adjusting screw 3, pedestal 6 and rubber ring 14.In the leveling board 2 wherein condenser lens is installed, by to the rotation scalable leveling board 2 of optical fiber access place 1 and the distance between optical fiber, thereby reaches the purpose of regulating distance between condenser lens and optical fiber; And, then can realize adjusting, thereby the angle of adjustment laser incident to leveling board 2 by cooperating between rubber ring 14 and the adjusting screw 3.The rubber ring 14 that is adopted in this coupling head is annular rubber ring, it is placed on the center between leveling board 2 and the pedestal 6, rubber ring 14 also has the effect in sealing laser propagation path except can the fit adjustment screw 3 adjustings that realize laser incident angle.
The shortcoming of this type of coupling head of the prior art is:
1, catabiosis takes place in rubber ring over time easily that adopted in the coupling head, the tension force and the amplitude that make rubber ring reply deformation reduce, thereby the tight ness rating of coincideing the screw thread that causes screw thread on the adjusting screw 3 and the screw on the pedestal reduces, and then the amplitude that causes degree of regulation to reduce greatly, regulate diminishes, finally reduce coupling efficiency, influenced the use of laser-optical fiber coupling head;
2, the elasticity coefficient of the rubber ring that is adopted in the coupling head is not easy accurate customization, has increased the difficulty that coupling head is regulated.
At application number is in the application of Canada of 2 574 702, and aforesaid employing rubber ring is focused has relevant explanation with the laser-optical fiber coupling head of angle.In the prior art, also have the laser-optical fiber coupling head of other type, but these coupling heads also exist the structure more complicated, cost an arm and a leg, the defective that when scale is used, is difficult for reducing cost.
Summary of the invention
Therefore, task of the present invention is to overcome in the existing laser-optical fiber coupling head because the defective that the degree of regulation that part aging produces reduces, thereby a kind of degree of regulation height, laser-optical fiber coupling head simple in structure are provided.
To achieve these goals, the invention provides a kind of laser-optical fiber coupling head, comprise optical fiber access place, pedestal and regulating device; Described regulating device comprises leveling board, adjusting screw and magnet, wherein, access place of described optical fiber is connected to an end of described leveling board, between described leveling board and the described pedestal magnet is installed, described adjusting screw is passed described leveling board and is installed between described leveling board and the described pedestal; Have the screw that is used to install described adjusting screw on the described leveling board, screw thread on described screw and the described adjusting screw (3) matches, and on described pedestal (6), be useful on the groove of fixing described adjusting screw (3), make described adjusting screw (3) pass in the groove that is installed to behind the described screw on the described leveling board (2) on the described pedestal (6); The adjusting of the anchorage force that produces by magnetic attraction that described magnet (10) is produced and described adjusting screw (3) realizes the adjustment of the relative position of described leveling board (2) and described pedestal (6);
After being installed to condenser lens (16) in the described leveling board (2), at first regulate described leveling board (2) by adjusting screw (3), laser vertical is injected be connected to the cross section of the optical fiber (15) in described optical fiber access place (1), the described optical fiber of horizontal adjustment access place (1) then, to regulate the distance of described condenser lens (16) and described optical fiber (15), make lens focus near the optical fiber cross section, and in the process of regulating described optical fiber access place (1), will guarantee that the optical axis of lens and the optical axis of optical fiber overlap all the time.
In the technique scheme, also comprise the seal bootr that is used to seal the laser propagation path, described seal bootr is between described leveling board and described pedestal.
In the technique scheme, also comprise the fixed screw of the coupling angle that is used to lock described laser-optical fiber coupling head, described fixed screw is installed on the described leveling board, realizes fixing between described leveling board (2) and the described pedestal (6).
In the technique scheme, a columned projection is arranged on the described leveling board, the circular hole of the length of described projection and diameter and described optical fiber access place bottom center is complementary, the smooth connection between described projection and described circular hole.
In the technique scheme, described adjusting screw has three, and described three adjusting screw are equilateral triangle on described leveling board or isosceles triangle distributes.
In the technique scheme, described magnet is annular permanent magnet, is enclosed within during installation on the described adjusting screw.
In the technique scheme, described magnet is permanent magnet, installs in the adjacent position with described adjusting screw (3).
In the technique scheme, described magnet is distributed between described leveling board and the pedestal with equilateral triangle or isosceles triangle.
In the technique scheme, described magnet is an annular permanent magnet, the center between described leveling board and described pedestal.
The invention has the advantages that:
1, laser-optical fiber coupling head of the present invention adopts magnet to substitute original rubber ring, can overcome rubber ring because the defective that the aging degree of regulation that is brought reduces.
2, in the laser-optical fiber coupling head of the present invention,, therefore, on pedestal, only need generate groove, and need not to be processed into screw, have the advantage that is easy to process in correspondence position processing because adjusting screw provides an outside anchorage force.
3, laser-optical fiber coupling head of the present invention is when wiping or replacing are arranged in the condenser lens of leveling board, can overcome magnet suction directly breaks pedestal and leveling board into two with one's hands, and need not optical fiber access place is unloaded from leveling board, so just avoided before and after the dismounting condenser lens, lens and optical fiber apart from change, overcome wiping or replacing and reunited the defective that need readjust condenser lens and 15 distances of optical fiber behind the focus lens.
4, in the laser-optical fiber coupling head of the present invention, owing to be connected by magnet between leveling board and pedestal, when leveling board need be changed, only need to replace with new leveling board to get final product, and do not need integral replacing with the dismounting of previous level plate down, not only convenient, also provide cost savings.
5, in the laser-optical fiber coupling head of the present invention, it is tightr that the absorption affinity of magnet makes that the screw thread of the screw thread of adjusting screw and the screw on the leveling board coincide, and strengthened the precision of regulating.
6, in the laser-optical fiber coupling head of the present invention, level is connected between optical fiber access place and the leveling board, makes that the optical axis position of optical fiber does not change, and has guaranteed the degree of regulation of coupling head when regulating optical fiber access place.
Description of drawings
Below, describe embodiments of the invention in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the optical schematic diagram of laser coupled to optical fiber;
Fig. 2 is the side view of laser-optical fiber coupling head common in the prior art;
Fig. 3 is a laser-optical fiber coupling head of the present invention side view in one embodiment;
Fig. 4 is the synoptic diagram of condenser lens position in the laser-optical fiber coupling head of the present invention;
Fig. 5 is a laser-optical fiber coupling head of the present invention upward view in one embodiment;
Fig. 6 is a laser-optical fiber coupling head of the present invention vertical view in one embodiment;
Fig. 7 is a laser-optical fiber coupling head of the present invention side view in another embodiment.
The drawing explanation
1 optical fiber access place, 2 leveling boards, 3 adjusting screw
10 magnet, 5 seal bootrs, 6 pedestals
7 exploration holes 8 are spiral shell 9 input ports fixedly
14 rubber rings, 15 optical fiber, 16 condenser lenses
Cylindrical bump on 17 circular holes, 18 leveling boards
Embodiment
Below in conjunction with the drawings and specific embodiments laser-optical fiber coupling head of the present invention is described.
Fig. 3, Fig. 5 and Fig. 6 are the explanations to one embodiment of the present invention, and wherein, Fig. 3 is the side view of a laser-optical fiber coupling head, and Fig. 5 is the vertical view of this coupling head, and Fig. 6 then is a upward view.From above-mentioned accompanying drawing as can be seen, in this embodiment, described laser-optical fiber coupling head comprises optical fiber access place 1, leveling board 2, adjusting screw 3, pedestal 6, seal bootr 5 and magnet 10.
Optical fiber access place 1 is the bottle cap shape on the whole, in the top middle portion of described bottle cap also to the right cylinder that is protruded with a hollow, the bottom center of optical fiber access place 1 has a circular hole 17, this circular hole 17 is used for combining with the corresponding component of leveling board 2, plays the effect that connects and regulate distance between leveling board 2 and optical fiber access place 1.
Leveling board 2 among the present invention, adjusting screw 3 and magnet 10 are formed a regulating device, and this regulating device is used to regulate the incident angle of laser.As shown in Figure 3, the one side of leveling board 2 wherein is useful on the interface that optical fiber access place 1 is installed, and access place 1 of realization optical fiber is connected with 2 of leveling boards, and another side then is close to seal bootr 5.As shown in Figure 4, wherein, described interface be one columned protruding 18, its length should be complementary with the corresponding circular hole 17 in optical fiber access place 1 with diameter.Described protruding 18 with 17 smooth connections of circular hole, when make regulating optical fiber access place 1, the optical axis position of optical fiber does not change.Described protruding 18 inner chamber hollow is fixed a condenser lens 16 by annular chock in the chamber, when fixing described condenser lens 16, the optical axis that should guarantee condenser lens 16 is always perpendicular to leveling board 2.By adjusting to optical fiber access place 1, can realize the distance adjustment of 15 of condenser lens 16 and optical fiber, the focus that makes condenser lens 16 to guarantee that laser beam all is focused in the optical fiber 15, reaches best focusing distance near cross section of optic fibre.
Magnet 10 is installed between leveling board 2 and the pedestal 6, utilizes the attractive force of 10 pairs of metals of magnet and the anchorage force of the pulling force that produces and adjusting screw 3 is realized the adjusting to leveling board 2.Because adjusting screw 3 provides an outside anchorage force in the present embodiment, therefore, on pedestal 6, only need generate groove, and need not to be processed into screw in correspondence position processing.When the condenser lens 16 in being installed in leveling board 2 chambeies needs wiping or replacing, only need overcome magnet suction breaks pedestal 6 and leveling board 2 into two with one's hands at full tilt, unload the chock that is used for fixing the annular of lens in the fixed focus lenses 16, directly condenser lens is taken out from the logical light of leveling board 2, after wiping is reunited focus lens 16 and loaded onto once more, again leveling board 2 and pedestal 6 are connected together.In the laser-optical fiber coupling head in the prior art, when needs wiping or replacing condenser lens 16, at first optical fiber access place 1 is unloaded from leveling board 2, taken out the condenser lens 16 in leveling board 2 chambeies then, then condenser lens 16 is done further processing.Compared with prior art, in the present embodiment, because when the dismounting condenser lens, do not need optical fiber access place 1 is unloaded from leveling board 2, and the position of magnet 10 and adjusting screw 3 is also basic in the dismounting front and back not to be changed, so the focal length of lens and yet not change substantially of angle, has so just avoided in dismounting condenser lens 16 front and back, lens and optical fiber apart from change, make wiping or replacing reunite the defective that need not to readjust condenser lens 16 and 15 distances of optical fiber behind the focus lens.In addition, for convenience detach owing to leveling board 2 is connected by magnet with 6 of pedestals, when leveling board 2 needs to change, only need the previous level plate is dismantled down, replace with new leveling board to get final product, and do not need integral replacing, not only convenient, also provide cost savings.The absorption affinity of magnet 10 also makes tightr that the screw thread of the screw thread of adjusting screw 3 and the screw on the leveling board 2 coincide, and has strengthened the precision of regulating.Magnet 10 in the present embodiment is the permanent magnet of ring-type, this annular permanent magnet ring set is in part between leveling board 2 and the pedestal 6 in adjusting screw 3, similar with aforementioned embodiments, the adjusting screw 3 in the present embodiment and the quantity of magnet 10, installation site and mutual matching relationship can have multiple realization means, when the permanent magnet 10 of adjusting screw 3 and annular is installed on the leveling board, can be positive triangle distribution or isosceles triangle and distributes.Adjusting screw 3 and magnet 10 also can be installed separately, and this moment, magnet 10 can adopt general permanent magnet, and adjusting screw 3 and magnet 10 are distributed between leveling board 2 and the pedestal 6 with positive triangle or isosceles triangle separately.
Accompany seal bootr 5 between leveling board 2 and pedestal 6, the effect of seal bootr 5 is that the travel path to laser seals, and is interfered in the process of propagating to prevent laser.Seal bootr 5 itself can be made by materials such as sponge, iron sheets in the form of a ring.
Laser-optical fiber coupling head in use is fixed on pedestal 6 on the laser output of laser instrument.As shown in Figure 6, pedestal 6 itself is hollow type in the form of a ring, and circular input port 9 is arranged in the bottom of pedestal 6, and the laser beam of incident enters into coupling head by this input port, through seal bootr 5, sends on the condenser lens 16.On pedestal 6, also has an exploration hole 7, exploration hole 7 is positioned at the side of pedestal 6, various external detectors may detect the various parameters of incident laser by exploration hole 7, as import power, energy of laser etc., by further measurement to the laser power input, can obtain the effect of laser coupled, thereby whether the incident angle of knowing laser is correct, whether the distance between lens and optical fiber is suitable etc.By measurement, can understand the variation of laser energy, the working condition of laser instrument etc. to laser energy.In addition, can also be equipped with the adjusting screw thread on the exploration hole,, and on exploration hole, can also be equipped with stationary installation,, and, guarantee the isolation of laser beam and air by encapsulation to exploration hole in order to the fixed data line in order to the position of adjusting range detector.Compare with the corresponding pedestal in the existing laser-optical fiber coupling head, the structure of the pedestal 6 in the present embodiment does not change, therefore, and in the present embodiment, its structure is not described further, those of ordinary skill in the art can realize with reference to prior art.
The laser that utilizes present embodiment realizes that to the coupling head of optical fiber laser is as follows to the process that optical fiber is coupled: the laser that be coupled is at first from input port 9 incidents of pedestal 6 bottoms, after passing seal bootr 5, shine on the condenser lens 16 in the leveling board 2, refraction through condenser lens 16 is sent to incident laser in the optical fiber 15.In this incident process, the distance that the incident angle of possible laser, condenser lens 16 and optical fiber are 15 all exists error, at this moment, need regulate laser-optical fiber coupling head of the present invention, its adjusting order is as follows: at first regulate leveling board by adjusting screw 3, make laser vertical inject the cross section of optical fiber 15, horizontal adjustment optical fiber access place 1 then, to regulate the distance of condenser lens 16 and optical fiber 15, make lens focus near the optical fiber cross section, and in the process of regulating optical fiber access place 1, will guarantee that the optical axis of lens and the optical axis of optical fiber overlap all the time.
In the above-described embodiments, can also install and fix screw 8 at leveling board 2, can it be remained unchanged the coupling angle locking of whole laser-optical fiber coupling head by this fixed screw 8, the particular location of fixed screw can be arranged according to specific requirement.
Also there is other implementation in laser-optical fiber coupling head of the present invention, as shown in Figure 7, in another embodiment, described magnet 10 is a bigger ringshaped magnet just, it is placed on the center between leveling board 2 and the pedestal 6, except the part as regulating device is used to regulate the laser incident angle, can also substitute seal bootr 5, realize sealing to the laser propagation path.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (9)

1, a kind of laser-optical fiber coupling head comprises optical fiber access place (1), pedestal (6) and regulating device; It is characterized in that, described regulating device comprises leveling board (2), adjusting screw (3) and magnet (10), wherein, described optical fiber access place (1) is connected to an end of described leveling board (2), between the other end of described leveling board (2) and the described pedestal (6) magnet (10) is installed, described adjusting screw (3) is passed described leveling board (2) and is installed between described leveling board (2) and the described pedestal (6); Described leveling board has the screw that is used to install adjusting screw (3) on (2), screw thread on described screw and the described adjusting screw (3) matches, and on described pedestal (6), be useful on the groove of fixing described adjusting screw (3), make described adjusting screw (3) pass in the groove that is installed to behind the described screw on the described leveling board (2) on the described pedestal (6); The adjusting of the anchorage force that produces by magnetic attraction that described magnet (10) is produced and described adjusting screw (3) realizes the adjustment of the relative position of described leveling board (2) and described pedestal (6);
After being installed to condenser lens (16) in the described leveling board (2), at first regulate described leveling board (2) by adjusting screw (3), laser vertical is injected be connected to the cross section of the optical fiber (15) in described optical fiber access place (1), the described optical fiber of horizontal adjustment access place (1) then, to regulate the distance of described condenser lens (16) and described optical fiber (15), make lens focus near the optical fiber cross section, and in the process of regulating described optical fiber access place (1), will guarantee that the optical axis of lens and the optical axis of optical fiber overlap all the time.
2, laser-optical fiber coupling head according to claim 1 is characterized in that, also comprises the seal bootr (5) that is used to seal the laser propagation path, and described seal bootr (5) is positioned between described leveling board (2) and the described pedestal (6).
3, laser-optical fiber coupling head according to claim 1 and 2, it is characterized in that, the fixed screw (8) that also comprises the coupling angle that is used to lock described laser-optical fiber coupling head, described fixed screw (8) is installed on the described leveling board (2), realizes fixing between described leveling board (2) and the described pedestal (6).
4, laser-optical fiber coupling head according to claim 1 and 2, it is characterized in that, a columned projection (18) is arranged on the described leveling board (2), the circular hole (17) of the length of described projection (18) and diameter and described optical fiber access place (1) bottom center is complementary, the smooth connection between described projection (18) and described circular hole (17).
5, laser-optical fiber coupling head according to claim 1 and 2 is characterized in that, described adjusting screw (3) has three, and described three adjusting screw (3) are equilateral triangle on described leveling board (2) or isosceles triangle distributes.
6, laser-optical fiber coupling head according to claim 5 is characterized in that, described magnet (10) is annular permanent magnet, is enclosed within during installation on the described adjusting screw (3).
7, laser-optical fiber coupling head according to claim 5 is characterized in that, described magnet (10) is permanent magnet, installs in the adjacent position with described adjusting screw (3).
8, laser-optical fiber coupling head according to claim 1 and 2 is characterized in that, described magnet (10) is distributed between described leveling board (2) and the pedestal (6) with equilateral triangle or isosceles triangle.
9, laser-optical fiber coupling head according to claim 1 is characterized in that, described magnet (10) is an annular permanent magnet, is positioned at the center between described leveling board (2) and the described pedestal (6).
CNB2007101775318A 2007-11-16 2007-11-16 A kind of laser-optical fiber coupling head Expired - Fee Related CN100541248C (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106291833A (en) * 2015-05-19 2017-01-04 杭州法博激光科技有限公司 Medical laser fiber coupling system
CN111308622A (en) * 2020-03-27 2020-06-19 中国人民解放军军事科学院国防科技创新研究院 Integrated high-frequency electromagnetic wave coupling transmission system
CN113805277A (en) * 2021-11-18 2021-12-17 之江实验室 Locking optical fiber coupler capable of being precisely adjusted in multiple dimensions

Citations (4)

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Publication number Priority date Publication date Assignee Title
US5793540A (en) * 1995-10-17 1998-08-11 Alps Electric Co., Ltd. Lens fixing structure
CN1794025A (en) * 2005-12-22 2006-06-28 武汉楚天激光（集团）股份有限公司 Optical fiber coupling device
US20070206904A1 (en) * 2006-01-20 2007-09-06 Sezerman Omur M Adjustable focus connector with spring action
CN201107428Y (en) * 2007-11-16 2008-08-27 北京中视中科光电技术有限公司 Coupling head from laser to optical fiber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5793540A (en) * 1995-10-17 1998-08-11 Alps Electric Co., Ltd. Lens fixing structure
CN1794025A (en) * 2005-12-22 2006-06-28 武汉楚天激光（集团）股份有限公司 Optical fiber coupling device
US20070206904A1 (en) * 2006-01-20 2007-09-06 Sezerman Omur M Adjustable focus connector with spring action
CN201107428Y (en) * 2007-11-16 2008-08-27 北京中视中科光电技术有限公司 Coupling head from laser to optical fiber

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