CN205246941U - From taking coupler type optic fibre - Google Patents
From taking coupler type optic fibre Download PDFInfo
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- CN205246941U CN205246941U CN201520985043.XU CN201520985043U CN205246941U CN 205246941 U CN205246941 U CN 205246941U CN 201520985043 U CN201520985043 U CN 201520985043U CN 205246941 U CN205246941 U CN 205246941U
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- optical fiber
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- optic fibre
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Abstract
The utility model relates to a from taking coupler type optic fibre, including the lens cone, arrange lens, transition fiber and coupling optic fibre in the lens cone in, the lens cone passes through the connecting pipe to be connected with the transition fiber, the transition fiber passes through fiber connector and coupling fiber connection, coupling optic fibre is the 2 -7 root, the throw area of transition fiber on each coupling optic fibre equals. The utility model discloses increase a transition fiber between coupling lens and optic fibre, can promote the yield greatly, and can realize even beam split when the coupling multifiber. The utility model discloses can be used to the quick coupling between laser and the optic fibre, promote optic fibre and laser instrument coupling efficiency to simple manufacture, it is with low costs, but the mass production, product repeatability is high.
Description
Technical field
The utility model relates to a kind of self coupling type optical fiber, belongs to fiber optic applications field.
Background technology
The coupling of laser instrument and optical fiber is the key technology that Fibre Optical Sensor, opto-electronic device and light display such as show at the field. WithLaser industrial expansion, optical fiber is also more and more applied as good transmission medium, but LASER Light Source and optical fiberThe problem of coupling loss also becomes increasingly conspicuous, and how to promote coupling efficiency, and the coupled modes that obtain a kind of convenient operation alsoMore and more be worth probing into.
Traditional coupled modes are to adopt laser instrument and one or more optical fiber directs to tap into row coupling, below this mode existsProblem: because silica fibre numerical aperture is little, extremely difficult and laser instrument coupling, optical coupling efficiency is low; Because laser is GaussDistribute, during for coupling multifiber, in coupling centering process, be prone to deviation, so the energy of each optical fiber emergent light dividesCloth is inhomogeneous. When coupling multifiber, because fiber end face quality there are differences, when laser energy is too high, very easily damage end faceRopy optical fiber. When the coupled fiber that former technique is made and coupling fiber, relative position is easily offset, and causes optical fiber to revolveTurn to another direction rear transmitting energy and change, affect product stability.
Summary of the invention
The utility model provides a kind of self coupling type fiber optic articles, has solved large core diameter silica fibre and laser instrument couplingThe problems such as efficiency is low, tolerance energy is low, poor stability, can solve the inhomogeneous problem of coupling multifiber light splitting simultaneously.
Technical scheme
Traditional approach is by optical fiber and laser instrument direct-coupling, and this mode coupling efficiency is low, and because optical fiber and connector are insertedThere is deviation in core concentricity, easily makes optical fiber by damage from laser. The inventor finds that laser instrument connects by coupled lens and optical fiberConnect, this mode is effectively to promote coupling efficiency, and while still making, determining of the relative position of optical fiber and lens is difficult toControl, optical fiber yield rate is low, and coupling multifiber cannot realize even light splitting, and designs between coupled lens and optical fiberIncrease the long transition optical fiber of one section of 40mm-50mm, can reduce manufacture difficulty, greatly promote yield rate, and can be at couplingWhile closing multifiber, realize even light splitting.
Transition optical fiber is not the cylindrical structure of conventional optical fibers, and cross section of optic fibre is not circular, but a kind of round rectangle, thisThe optical fiber of planting structure can reduce the impact that while coupling, optical fiber concentricity difference band comes greatly, and the while is homogenize laser and many effectivelyThe coupling energy of root optical fiber, reaches the object of branch's balancing energy. The making that realizes this transition optical fiber is also the utility modelA difficult point, be first by preform through specially treated, be made into class rectangle bar, then pass through drawing optical fibersProcess drawing goes out the transition optical fiber of corresponding clear aperature, then cuts into corresponding length, and two ends all adopt copperhead to solidify, thenBy two ends grinding and polishing, require on fiber end face no marking without pit, to can better transmit laser. The light hole of transition optical fiberFootpath is approximately the 60%-80% of coupled fiber area summation.
While making many coupled fibers, need the arrangement mode of coupled fiber to design, especially making 1*2When type or 1*4 type band coupler optical fiber, optical fiber adopts hexagonal array mode, can make the gap minimum between optical fiber, phaseWith obtaining higher laser energy under area.
A kind of self coupling type optical fiber, comprises lens barrel, is placed in lens, transition optical fiber and coupled fiber in lens barrel, lens barrelBe connected with transition optical fiber by tube connector, transition optical fiber is connected with coupled fiber by the joints of optical fibre, and described coupled fiber is2-7 root, the projected area of described transition optical fiber on each coupled fiber equates. The present invention is between coupled lens and optical fiberDesign increases a kind of transition optical fiber, can greatly promote yield rate, and can in the time of coupling multifiber, realize even light splitting.
Further, the cross section of described transition optical fiber is round rectangle. The optical fiber of this structure can reduce the coupling time greatlyThe impact that fine concentricity difference band comes, the effective coupling energy of homogenize laser and multifiber simultaneously, reaches branch's energy equalThe object of weighing apparatus.
Further, the length of described transition optical fiber is 40mm-50m, and the length in the cross section of transition optical fiber is 580um-620um,Wide is 280um-320um.
Further, the quantity of described coupled fiber is 2 or 4. The optical fiber of these two kinds of quantity can be easy to transition optical fiber couplingClose, obtain the optical fiber that energy output divides uniformly.
Further, the relative aperture of described lens is 1:5.
Further, described coupled fiber is large core diameter silica fibre, and its core skin is than scope 1:1.04-1:1.2, optical fiber core diameter modelEnclose for 200um-600um.
The preparation method of above-mentioned self coupling type optical fiber:
(1) preparation of transition optical fiber: select the preform of Φ 10-12mm external diameter, in prefabricated rods, can not have bubble,Crackle, carries out grinding and polishing by the side of the prefabricated rods of choosing, and the mill amount of disappearing is 1/4 of prefabricated rods volume, and then by corresponding oneThe limit also same volume of grinding obtains final prefabricated rods, and the prefabricated rods of handling well is put into and in high temperature furnace, is drawn into required optical fiber,Wire-drawing temperature is controlled at 1900 DEG C-2100 DEG C, and drawing speed is controlled at 10-15m/min, and the fiber cut having drawn is become40-50mm length, obtains required transition optical fiber;
(2) adopt high temperature heat-conducting glue that lens and lens barrel are solidified;
(3) transition optical fiber is solidificated in tube connector, on optical bench, adjusts the relative position of lens barrel and transition optical fiber,Make lens focus in transition optical fiber, focal beam spot is less than the logical light core diameter of transition optical fiber, by the lens barrel of adjusting and tube connectorEmploying adhesive solidifies;
(4) coupled fiber is solidificated in the joints of optical fibre, transition optical fiber long axis direction and coupled fiber orientation are adjustedWhole consistent, then adjust the relative position of coupled fiber and transition optical fiber, going out to each branch optical fiber to be adjusted by fine settingPenetrate light energy evenly after, adopt optical cement to solidify transition optical fiber and coupled fiber, must carry coupler type optical fiber.
Beneficial effect
The present invention has realized laser and optical fiber, especially, with the coupling of multifiber, utilizes transition optical fiber to effectively reduce makingDifficulty, has promoted the yield rate of goods; The transition optical fiber of large scale clear aperature has also promoted its tolerance laser power; SolveAfter the coupling of laser and multifiber, the uneven problem of each branch optical fiber emergent light Energy distribution, can realize mass production.
Brief description of the drawings
The structural representation of Fig. 1 self coupling type of the present invention optical fiber;
Fig. 2 is the schematic diagram of the end face A of Fig. 1;
Fig. 3 is the schematic diagram (coupled fiber is 2) of the end face B of Fig. 1;
Fig. 4 is the schematic diagram (coupled fiber is 4) of the end face B of Fig. 1.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, 2, a kind of self coupling type optical fiber of the present invention, comprise lens barrel 2, be placed in lens barrel 2 thoroughlyMirror 1, transition optical fiber 4 and coupled fiber 6, lens barrel 2 is connected with transition optical fiber 4 by tube connector 3, and transition optical fiber 4 is logicalCross the joints of optical fibre 5 and be connected with coupled fiber 6, the projected area of described transition optical fiber on each coupled fiber equates. InstituteThe cross section of stating transition optical fiber is round rectangle, and the relative aperture of described lens is 1:5.
The length of described transition optical fiber is 45mm.
The quantity of described coupled fiber is 2 or 4, the schematic diagram when quantity that Fig. 3 is coupled fiber is 2, Fig. 3Schematic diagram while being 4 for the quantity of coupled fiber.
Described coupled fiber is large core diameter silica fibre, and its core skin is than being 1:1.1; Optical fiber core diameter scope is 300um, mistakeThe length (a) of crossing the cross section of optical fiber 4 is 600um, and wide (a) of the cross section of transition optical fiber 4 is 300um.
Preparation technology:
(1) preparation of transition optical fiber: select the preform of Φ 12mm external diameter, can not have bubble in prefabricated rods, splitLine, carries out grinding and polishing by the side of the prefabricated rods of choosing, and the mill amount of disappearing is 1/4 of prefabricated rods volume, and then will be on one side correspondingAlso the same volume of grinding obtains final prefabricated rods, and the prefabricated rods of handling well is put into and in high temperature furnace, is drawn into required transition lightFibre, wire-drawing temperature is controlled at 1900 DEG C-2100 DEG C, and drawing speed is controlled at 10-15m/min, by the transition optical fiber having drawnCut into 45mm length, obtain required transition optical fiber;
(2) adopt high temperature heat-conducting glue that lens and lens barrel are solidified, solidification temperature is 25 DEG C, time 24h;
(3) transition optical fiber is solidificated in tube connector, 120 DEG C of solidification temperatures, hardening time 5h. On optical bench, adjustThe relative position of good lens barrel and transition optical fiber, makes lens focus in transition optical fiber, and focal beam spot is less than the logical light of transition optical fiberCore diameter, adopts adhesive to solidify the lens barrel of adjusting and tube connector, first adopts instantaneous adhesive cures to adopt high-temp glue solid againChange;
(4) coupled fiber is solidificated in the joints of optical fibre, adopts five dimension optical fiber adjusting brackets to regulate transition optical fiber and optical fiberThe accuracy of alignment of connector, transition optical fiber long axis direction is consistent with coupled fiber orientation adjustment, then adjust by fine settingThe relative position of whole coupled fiber and transition optical fiber, to be adjusted to the emergent light energy even of each branch optical fiber, adopt lightLearn adhesive curing transition optical fiber and coupled fiber, must carry coupler type optical fiber.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the artSay, do not departing under the prerequisite of the utility model know-why, can also make some improvement and modification and also should be considered as this practicalityNovel protection domain.
Claims (6)
1. a self coupling type optical fiber, is characterized in that, comprise lens barrel, be placed in lens in lens barrel, transition optical fiber andCoupled fiber, lens barrel is connected with transition optical fiber by tube connector, and transition optical fiber is connected with coupled fiber by the joints of optical fibre,Described coupled fiber is 2-7 root, and the projected area of described transition optical fiber on each coupled fiber equates.
2. self coupling type optical fiber as claimed in claim 1, is characterized in that, the cross section of described transition optical fiber is circleAngular moment shape.
3. self coupling type optical fiber as claimed in claim 1, is characterized in that, the length of described transition optical fiber is40mm-50m, the length in the cross section of transition optical fiber is 580um-620um, wide is 280um-320um.
4. self coupling type optical fiber as claimed in claim 1, is characterized in that, the quantity of described coupled fiber is 2Or 4.
5. self coupling type optical fiber as claimed in claim 1, is characterized in that, the relative aperture of described lens is 1:5.
6. the self coupling type optical fiber as described in claim 1 to 5 any one, is characterized in that, described coupled fiber isLarge core diameter silica fibre, core skin is than being 1:1.04-1:1.2, optical fiber core diameter is 200-600um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520985043.XU CN205246941U (en) | 2015-12-01 | 2015-12-01 | From taking coupler type optic fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520985043.XU CN205246941U (en) | 2015-12-01 | 2015-12-01 | From taking coupler type optic fibre |
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| Publication Number | Publication Date |
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| CN205246941U true CN205246941U (en) | 2016-05-18 |
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| CN201520985043.XU Active CN205246941U (en) | 2015-12-01 | 2015-12-01 | From taking coupler type optic fibre |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334588A (en) * | 2015-12-01 | 2016-02-17 | 南京春辉科技实业有限公司 | Optical fiber with coupler and preparation method of optical fiber |
| CN109683252A (en) * | 2017-10-18 | 2019-04-26 | 株式会社岛津制作所 | Optically coupled device |
-
2015
- 2015-12-01 CN CN201520985043.XU patent/CN205246941U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334588A (en) * | 2015-12-01 | 2016-02-17 | 南京春辉科技实业有限公司 | Optical fiber with coupler and preparation method of optical fiber |
| CN109683252A (en) * | 2017-10-18 | 2019-04-26 | 株式会社岛津制作所 | Optically coupled device |
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| GR01 | Patent grant |