CN201331605Y - Optical fiber coupling packaging structure for high-power semi-conductor laser - Google Patents
Optical fiber coupling packaging structure for high-power semi-conductor laser Download PDFInfo
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- CN201331605Y CN201331605Y CNU2008201807573U CN200820180757U CN201331605Y CN 201331605 Y CN201331605 Y CN 201331605Y CN U2008201807573 U CNU2008201807573 U CN U2008201807573U CN 200820180757 U CN200820180757 U CN 200820180757U CN 201331605 Y CN201331605 Y CN 201331605Y
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Abstract
Disclosed is an optical fiber coupling packaging structure for a high-power semi-conductor laser, which is a packaging structure coupling light beams emitted by a single high-power semi-conductor laser to an optical fiber. The packaging structure couples laser which is sent by a semi-conductor laser and shaped by a micro-cylindrical mirror in fast axis direction into an optical fiber through a lens-optical fiber component which is coaxially mounted in advance. The lens-optical fiber component is composed of a lens, a locating ring, an optical fiber pin and a sleeve barrel, wherein the lens, the locating ring and the optical fiber pin are coaxially arrayed and fixed by the sleeve barrel, and the lens-optical fiber component is directly welded on an optical fiber outlet of a packaging casing by metal welding flux without extra fixing measures. The utility model is simple in structure and convenient in adjustment.
Description
Technical field
The utility model belongs to the application of semiconductor laser.The light high-level efficiency of high power semiconductor lasers is coupled to optical fiber output, can satisfies the demand of medical treatment, illumination, printing and other commercial Application aspects.
Background technology
General large-power semiconductor Laser Output Beam is 30 °～40 ° in the angle of divergence half-breadth of quick shaft direction, the slow axis angle of divergence is 6 °～10 °, for this extremely asymmetric light beam efficiently is coupled to numerical aperture usually smaller or equal in 0.22 the optical fiber, the used method of present most product only is through a beam shaping, with the angle of divergence shaping of a cylindrical mirror with its quick shaft direction, keep the beam divergence angle of slow-axis direction constant, then the light beam after this shaping is shone directly into fiber end face and finish coupling.This simple for structure, can obtain the output of higher coupling efficiency, but shortcoming be the core diameter of output optical fibre can not be less than the size of laser instrument active area, limit from the optical power density of optical fiber output.
Another coupling scheme is to increase lens or lens combination after through the light beam of a shaping, and the semiconductor laser beam that is about to after the cylindrical mirror shaping carries out the shaping focusing second time.Therefore, cooperate the numerical aperture of coupled fiber, the hot spot through suitably selecting the parameter of lens, can make to arrive output optical fibre obtains to be higher than 85% coupling efficiency simultaneously less than the size of laser instrument active area.The light beam high-level efficiency that is about to semiconductor laser is coupled in the optical fiber of core diameter less than laser instrument active area size.
With respect to the coupling process of an above-mentioned at present popular shaping,, can increase usually and adjust and many difficulties of installation aspect because second method has increased lens.The utility model belongs to a kind of utility structure of realizing second method, adjustment, mounting hardness have been reduced: by coaxial installation lens-optical fiber contact pins assembly in advance, guaranteed the coaxial of lens and optical fiber on the one hand, also be easy to adjust distance and relative position between the two simultaneously, can simplify greatly and adjust and install; The structure that directly lens-optical fiber component is welded in the optical fiber outlet on the package casing has also been removed corresponding support component from, makes easy and simple to handle, reliable, stable.
Summary of the invention
Fig. 1, Fig. 2 and Fig. 3 are seen in structural representation of the present utility model.Its principle of work is that the asymmetric divergent beams that little cylindrical mirror (2) sends laser instrument (1) (about 30 °～40 ° on fast axle, 6 °～10 ° of slow axis) are in the quick shaft direction shaping.This light beam irradiates arrives the light beam dead ahead lens-optical fiber component of light shaft coaxle with it, and scioptics (6) are focused on optical fiber (3) end face, spot size is less than or equal to the optical fiber core diameter, and the angle of divergence makes the efficient coupled into optical fibres of light less than the angle of Optical Fiber Numerical Aperture correspondence.
Lens-optical fiber component is installed on formation in the circular sleeve (8) in turn by lens (6), spacing ring (9) optical fiber contact pins (4) of circle, and sleeve (8) guarantees the coaxial of lens (6) and optical fiber contact pins (4).
Lens (6) can be common sphere or non-spherical lens, also can be GRIN Lens.One end of optical fiber (3) is loaded in the columniform optical fiber contact pins (4) in advance, and coaxial with optical fiber contact pins, and its end face polishes, polishes, and the plating anti-reflection film.
If the diameter and the optical fiber contact pins of lens (6) are inconsistent, then can not directly it be directly installed in the sleeve (8), it earlier coaxially need be installed to that internal diameter is consistent with lens diameter, in the adaptation ring (7) of external diameter and optical fiber contact pins (4) unanimity, reinstall in the circular sleeve (8), to guarantee the coaxial of lens (6) and optical fiber contact pins (4).As shown in Figure 1.If the external diameter of lens (6) and optical fiber contact pins (4) external diameter equate, then do not need adaptation ring (7), get final product in the sleeve (8) of directly lens (6) being packed into, as shown in Figure 2.
The cross sectional shape of circular sleeve (8) can be complete circle, also can be the opening cylinder that cross section that barrel is opened groove vertically is " C " shape, and material is the pottery of metal or outside surface plating.The opening barrel bore is slightly less than the external diameter of adaptation ring (7) and optical fiber contact pins (4), make sleeve (8) can lock ring lens (6), adaptation ring (7) and optical fiber contact pins (4), guarantee that lens (6) and optical fiber (3) are coaxial, formation lens-optical fiber component.
Can calculate best couplings distance and image distance according to laser active area size, the slow axis angle of divergence, lens parameter and used optical fiber core diameter and numerical aperture.When batch jobs, can make the spacing ring that thickness is the optimum coupling image distance (9) in advance and be placed between lens (6) and the optical fiber contact pins (4), thereby guarantee that the distance between the two is suitable.Like this, to the shaping second time, only need to adjust the coaxial of laser beam and whole lens-optical fiber component, the object distance when finding out optimistic coupling efficiency then gets final product.
In order to install easily and fixed lens-optical fiber component, drawn the outlet of optical fiber being used on the individual laser package shell (10) and make a pipe (11), its internal diameter is greater than the external diameter of lens-optical fiber component middle sleeve (8), pipe upper opening (12), lens-optical fiber component insert pipe (11) adjusting that is coupled, adjusting finishes promptly opening (12) by the pipe top with in the brazing metal ascending pipe, and lens-optical fiber component is weldingly fixed in the pipe, sees Fig. 3.This mounting means no longer needs extra support component, and technology is very simple and reliable and quick.
Because inner each element of lens-optical fiber component is pre-fixed, do not need extra fixing and supporting element, therefore only need carry out it integrally-regulated in coupling process, device and step are all very simple, and can implement in the small space in package casing.With this structure the slow axis angle of divergence being coupled into numerical aperture less than 10 ° semiconductor laser is 0.22 optical fiber, and when the optical fiber core diameter was half laser instrument active area width, coupling efficiency can reach more than 85%.
In practical set, lens and optical fiber in lens-optical fiber component may be not exclusively coaxial, but the relative position of trimming assembly and light beam can guarantee that still laser beam focuses on the fiber core.
Description of drawings
Fig. 1 is the cut-open view of lens-optical fiber component, and the position of it and little cylindrical mirror and semiconductor laser relation, and wherein lens are installed in the adaptation ring.
Fig. 2 is the cut-open view of lens-optical fiber component, and the position of it and little cylindrical mirror and semiconductor laser relation, and wherein the diameter of lens (6) and sleeve (8) internal diameter are complementary, and it is interior and do not need adaptation ring to be directly installed on sleeve.
Fig. 3 be lens-optical fiber component in the optical fiber outlet of package casing the installation site and the schematic side view of whole encapsulating structure.
Among the figure: 1. laser tube core, 2. little cylindrical mirror, 3. optical fiber, 4. optical fiber contact pins, 5. contact pin tail, 6. lens, 7. lens adaptation ring, 8. sleeve, 9. spacing ring, 10. package casing, 11. optical fiber outlets, 12. optical fiber outlet top opening, 13. in the laser beam of quick shaft direction after little cylindrical mirror shaping.
Embodiment
By high-precision micropositioning stage and glue little cylindrical mirror (2) is installed to the place ahead of the semiconductor laser chip (1) on heat sink that is welded, makes laser beam obtain shaping, and penetrate perpendicular to the chip of laser end face at quick shaft direction.In the installation, observe the direction and the shaping degree of light beam by checking far-field spot.
The laser instrument that installs little cylindrical mirror is welded in the package casing, make mouth of pipe center symmetrical distribution, and laser instrument is suitable to the distance of shell antetheca through the relative optical fiber outlet of light beam (11) of little cylindrical mirror shaping.
Lens (6) are contained in the adaptation ring (7) usually, and are identical with the contact pin external diameter to guarantee its external diameter, if the external diameter of lens (6) and sleeve (8) internal diameter mate, then do not need adaptation ring (7).One end of optical fiber (3) is contained in the optical fiber contact pins (4), and end face is through grinding, polish and the plating anti-reflection film.Lens are fixed on an end of sleeve (8), insert the good spacing ring (9) of THICKNESS CALCULATION after, optical fiber contact pins (4) is inserted from the sleeve other end, hold out against spacing ring, contact pin is inserted into the position.So just made lens-optical fiber component.It is fixing to stick with glue knot between lens and adaptation ring, adaptation ring and the sleeve.Bush material is metal or is coated with the pottery of metal level with the surface that the cylinder that can be sealing also can be the cylinder that the cross section becomes " C " shape opening.
About package casing is installed in, the pitching two dimension rotates on the micromatic setting, contact pin tail (5) is clamped on the three-dimensional translating micromatic setting, a lensed end stretches in the package casing (12) from the outside by optical fiber outlet (11), aims at laser tube core, as shown in Figure 3.The optical fiber other end is aimed at laser powermeter.Add suitable electric current to laser instrument, carry out five dimension inchings, make the optical axis of light beam and the optical axis coincidence of lens-optical fiber component.Adjust the distance of laser instrument, make the luminous power that of optical fiber be output as maximum to lens-optical fiber component.At this moment in the opening (12) that melts on the scolder injection fibre outlet (11), lens-optical fiber component is welded in the pipe (11).Use at last glue at tail end with contact pin (4) and sleeve (8) and optical fiber outlet (11) seal.So far finish adjustment and fixing, whole laser instrument coupled structure is finished.
As an example, wide to bar with the utility model structure is that the laser instrument of 200 μ m carries out the optical fiber coupling, and optical fiber core diameter 105 μ m, numerical aperture 0.22 select lens to make object distance 5mm, image distance 0.95mm, can obtain to be higher than 85% coupling efficiency.
Claims (7)
1. high power semiconductor lasers optical fiber coupling encapsulating structure, it is characterized by: by coaxial mounted lens-optical fiber component of forming by lens, spacing ring, optical fiber contact pins, sleeve, with the coupling light in the optical fiber after little cylindrical mirror is to the quick shaft direction shaping that semiconductor laser chip sent, and this lens-optical fiber component directly is fixed in the optical fiber outlet on the semiconductor laser package casing with brazing metal.
2. a kind of high power semiconductor lasers optical fiber coupling encapsulating structure according to claim 1, it is characterized by: the structure of lens-optical fiber component is installed in turn in the same sleeve by lens, spacing ring, optical fiber contact pins and constitutes, lens, optical fiber contact pins, sleeve all are circular, guarantee the coaxial of lens, optical fiber contact pins by sleeve.
3. a kind of high power semiconductor lasers optical fiber coupling encapsulating structure according to claim 1, it is characterized by: the lens in lens-optical fiber component are sphere or non-spherical lens, or GRIN Lens; Lens diameter is consistent with the optical fiber contact pins external diameter, or coaxially be installed to that internal diameter is consistent with lens diameter, in the adaptation ring of external diameter and optical fiber contact pins unanimity.
4. a kind of high power semiconductor lasers optical fiber coupling encapsulating structure according to claim 1, it is characterized by: in lens-optical fiber component, it is interior and coaxial with the cylindrical fiber contact pin that one end of optical fiber is installed in the cylindrical fiber contact pin, and fiber end face polishes, polishes, and the plating anti-reflection film.
5. a kind of high power semiconductor lasers optical fiber coupling encapsulating structure according to claim 1, it is characterized by: the sleeve in lens-optical fiber component is that cross sectional shape is circular cylinder, or the barrel cross section of opening groove vertically is the opening cylinder of " C " shape, and material is the pottery of metal or outside surface plating.
6. a kind of high power semiconductor lasers optical fiber coupling encapsulating structure according to claim 1, it is characterized by: lens-optical fiber component is positioned at the laser beam dead ahead through little cylindrical mirror shaping, and the two optical axis coincidence, lens are focused at fiber end face with laser beam, and the size of focused light spot is less than or equal to the optical fiber core diameter.
7. a kind of high power semiconductor lasers optical fiber coupling encapsulating structure according to claim 1, it is characterized by: the outlet that being used on the individual laser package shell drawn optical fiber is a pipe, its internal diameter is greater than the external diameter of lens-optical fiber component middle sleeve, the pipe upper opening will be weldingly fixed on lens-optical fiber component in the pipe in the brazing metal ascending pipe by opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201807573U CN201331605Y (en) | 2008-12-08 | 2008-12-08 | Optical fiber coupling packaging structure for high-power semi-conductor laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201807573U CN201331605Y (en) | 2008-12-08 | 2008-12-08 | Optical fiber coupling packaging structure for high-power semi-conductor laser |
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| CN201331605Y true CN201331605Y (en) | 2009-10-21 |
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| CNU2008201807573U Expired - Fee Related CN201331605Y (en) | 2008-12-08 | 2008-12-08 | Optical fiber coupling packaging structure for high-power semi-conductor laser |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908706A (en) * | 2010-07-21 | 2010-12-08 | 中国科学院半导体研究所 | Method for fixing optical components in resonant cavity of solid state laser |
| CN104101488A (en) * | 2014-07-29 | 2014-10-15 | 黄石晨信光电有限责任公司 | Directionality precision detection method of optical fiber insertion core assembly |
| CN104503029A (en) * | 2014-11-25 | 2015-04-08 | 武汉电信器件有限公司 | Pluggable type adapter assembly for coupling of collimating optical path |
| CN106019497A (en) * | 2016-07-22 | 2016-10-12 | 合肥芯碁微电子装备有限公司 | Assembling and inspecting method for LD laser assembly |
| CN109642997A (en) * | 2016-08-26 | 2019-04-16 | 株式会社岛津制作所 | Light emitting device |
| CN110932086A (en) * | 2019-12-05 | 2020-03-27 | 北京凯普林光电科技股份有限公司 | Semiconductor laser |
| CN111221134A (en) * | 2020-03-12 | 2020-06-02 | 北京凯普林光电科技股份有限公司 | Light beam shaper of semiconductor laser and manufacturing method |
-
2008
- 2008-12-08 CN CNU2008201807573U patent/CN201331605Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908706A (en) * | 2010-07-21 | 2010-12-08 | 中国科学院半导体研究所 | Method for fixing optical components in resonant cavity of solid state laser |
| CN104101488A (en) * | 2014-07-29 | 2014-10-15 | 黄石晨信光电有限责任公司 | Directionality precision detection method of optical fiber insertion core assembly |
| CN104101488B (en) * | 2014-07-29 | 2016-05-18 | 黄石晨信光电有限责任公司 | A kind of directionality accurate detecting method of fiber stub assembly |
| CN104503029A (en) * | 2014-11-25 | 2015-04-08 | 武汉电信器件有限公司 | Pluggable type adapter assembly for coupling of collimating optical path |
| CN104503029B (en) * | 2014-11-25 | 2017-11-17 | 武汉电信器件有限公司 | A kind of pluggable type adapter assembly for collimated light path coupling |
| CN106019497A (en) * | 2016-07-22 | 2016-10-12 | 合肥芯碁微电子装备有限公司 | Assembling and inspecting method for LD laser assembly |
| CN106019497B (en) * | 2016-07-22 | 2018-04-17 | 合肥芯碁微电子装备有限公司 | A kind of assembling of LD laser assemblies and the method for inspection |
| CN109642997A (en) * | 2016-08-26 | 2019-04-16 | 株式会社岛津制作所 | Light emitting device |
| CN109642997B (en) * | 2016-08-26 | 2020-12-25 | 株式会社岛津制作所 | Light emitting device |
| CN110932086A (en) * | 2019-12-05 | 2020-03-27 | 北京凯普林光电科技股份有限公司 | Semiconductor laser |
| CN111221134A (en) * | 2020-03-12 | 2020-06-02 | 北京凯普林光电科技股份有限公司 | Light beam shaper of semiconductor laser and manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20151208 |
|
| EXPY | Termination of patent right or utility model |