CN204290025U - A kind of high-power fiber pump combiner - Google Patents
A kind of high-power fiber pump combiner Download PDFInfo
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- CN204290025U CN204290025U CN201420720753.5U CN201420720753U CN204290025U CN 204290025 U CN204290025 U CN 204290025U CN 201420720753 U CN201420720753 U CN 201420720753U CN 204290025 U CN204290025 U CN 204290025U
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Abstract
The utility model provides a kind of technical scheme of high-power fiber pump combiner, the method utilizes the input of the fibre-optic waveguide structure after drawing cone shaping (comprising N root input pumping light fibre, cone district, fusion point, output optical fibre) and output to have the coating twice high refractive index UV glue of skill, thus make it be fixed on the reeded aluminum substrate of a band, then seal the encapsulation to complete pump combiner with an aluminium matter upper cover point glue identical with aluminum substrate groove structure.Pump combiner structure after utilizing the utility model to encapsulate is simple, and it is not obvious that heat hoards phenomenon, good heat dissipation effect, and device is not fragile, and tolerance power can reach kW to number kW magnitude.
Description
Technical field
The utility model relates to a kind of optical device and method for packing thereof, especially a kind of high-power fiber pump combiner.
Background technology
In the prior art, known technology is, fiber pump combiner have easy to use, coupling efficiency is high, integrated level advantages of higher, has become pump coupling mode main in fiber laser.The main composition of fiber pump combiner comprises two parts: one is the fibre-optic waveguide structure after drawing cone shaping; Two is encapsulating structures.The encapsulation of fiber pump combiner should possess following tripartite's surface function: one is effectively fix the fibre-optic waveguide structure in pump combiner; Two is effectively absorb the stray light in pump combiner; Three is effectively transmit the used heat in pump combiner, thus reduces the thermal effect of pump combiner, improves the tolerance power of pump combiner.
At present, the encapsulating structure of fiber pump combiner is general more complicated, and heat dispersion is poor, and especially the package cooling of kW level high-power fiber pump combiner generally takes the water flowing type of cooling, its encapsulation process and the equal relative complex of structure.How effectively to improve leaded light, the heat dispersion of fiber pump combiner, and effectively simplify encapsulating structure thus easy to usely become the major issue that need solve, this is the weak point existing for prior art.
Utility model content
The purpose of this utility model, be exactly for the deficiency existing for prior art, and provide a kind of technical scheme of high-power fiber pump combiner, program structure is simple, easy to use, perfect heat-dissipating, and tolerance power can up to kW magnitude.
This programme is achieved by the following technical measures:
A kind of high-power fiber pump combiner, is characterized in that: include upper cover, substrate, the input pumping light fibre bundle be welded together and export pumping optical fiber; Input pumping light fibre bundle and output pumping optical fiber horizontal are placed on substrate; Substrate two ends and middle part are provided with groove; Input pumping light fibre bundle is placed on the groove of substrate one end; Exporting pumping optical fiber is placed on the groove of the substrate other end; The fusion point of input pumping light fibre bundle and output pumping optical fiber is arranged on the groove in the middle part of substrate; Upper cover plate covers on substrate.
Preferred as this programme: the plain fiber portion of input pumping light fibre bundle is dispersed to be opened, and there is gap between each exposed optical fiber, and roll over UV glue by height plain fiber portion is fixed on substrate.
Preferred as this programme: export pumping optical fiber and roll over UV glue by the height be coated on optical fiber and be fixed on substrate.
Preferred as this programme: the shape of groove is semicircular arc, inside grooves is closely placed with the semicircular arc V-type groove that angle of taper is less than the maximum stable transmission angle of optical fiber above groove.
Preferred as this programme: when the plain fiber portion of input pumping light fibre disperses, the plain fiber portion of dispersion is all arranged in same plane or is scattered in three dimensions.
The beneficial effect of this programme can be learnt according to describing of such scheme, because the length of substrate is suitable for mutually with the fibre-optic waveguide structure length of pump combiner in this scenario, the groove of substrate is semicircular arc, its diameter is several millimeters, angle of taper of closely arranging in groove is less than the semicircular arc V-type groove at optical fiber maximum stable transmission angle, thus effectively absorb cannot the larger stray light of the angle of stable transfer in a fiber; The object that the bare fiber of input pumping light fibre spreads out is in order to avoid causing heat to hoard, because when input optical fibre be bundled in together or close-packed arrays time, high folding ultraviolet glue can immerse the small gaps between optical fiber, thus form the low inside and high outside type optical fiber structure of refractive index, such structure cannot be effectively guide-lighting and light beam is gathered in UV glue form heat to hoard, because the thermal conductivity of quartz and UV glue is all very low, so, serious thermal effect can be caused like this, thus reduce the tolerance power of pump combiner.
Height is rolled over reason that UV glue is coated in the plain fiber portion of input pumping light fibre be near fusion point near the scattered light that produces enter the polymer protective layer of input pumping light fibre, thus cause unnecessary accumulation of heat.
When on the bare fiber that UV glue is directly coated in input pumping light fibre, stray light before entering polymer protective layer just derive by height folding UV glue, and absorb by aluminum substrate, thus effectively can lower thermal effect.
When output pumping optical fiber is polymer-clad fiber, the original position of UV glue coating should the object concordant with polymer be that the scattered light produced near fusion point in order to polymer be absorbed is derived substantially completely, and utilizes UV glue to carry out heat conduction to polymer.If UV glue is not concordant with the original position of polymer, then scattered light can directly enter in this part the unsettled polymer do not covered by UV glue, thus the accumulation of heat of initiated polymerization thing covering, reduce the tolerance power of pump combiner.
As can be seen here, compared with prior art, structure is simple for the utility model, it is not obvious that heat hoards phenomenon, good heat dissipation effect, and device is not fragile, tolerance power can reach kW to number kW magnitude, and have outstanding substantive distinguishing features and progress significantly, its beneficial effect implemented also is apparent.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that upper cover seals pumping coupler.
In figure, 1 is that input pumping light is fine, and 2 is cone district, and 3 is fusion point, and 4 for exporting pumping optical fiber, 5 is substrate, and 6 is V-type groove, and 7 is V-type groove, and 8 is V-type groove, and 9 is first high refractive index UV glue, 10 is the bare fiber of input pumping light fibre, and 11 is second high refractive index UV glue, and 12 is upper cover, and 13 is screw.
Embodiment
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
As Fig. 1, the utility model includes upper cover, substrate, the input pumping light fibre bundle be welded together and exports pumping optical fiber; Input pumping light fibre bundle and output pumping optical fiber horizontal are placed on substrate; Substrate two ends and middle part are provided with groove; Input pumping light fibre bundle is placed on the groove of substrate one end; Exporting pumping optical fiber is placed on the groove of the substrate other end; The fusion point of input pumping light fibre bundle and output pumping optical fiber is arranged on the groove in the middle part of substrate; Upper cover plate covers on substrate; The plain fiber portion of input pumping light fibre bundle is dispersed to be opened, and there is gap between each exposed optical fiber, and is fixed on substrate by height folding UV glue by plain fiber portion; Exporting pumping optical fiber is fixed on substrate by the height folding UV glue be coated on optical fiber; The shape of groove is semicircular arc, and inside grooves is closely placed with the semicircular arc V-type groove that angle of taper is less than the maximum stable transmission angle of optical fiber above groove.
Concrete method for packing is:
Select the fine model of the input pumping light of 7 × 1 pump combiner to be the multimode fiber that core 200um/ wraps 220um, NA=0.22, output pumping optical fiber is doubly clad optical fiber, and the diameter of its silica clad is 400um, and polymer diameter is 550um, NA=0.46.
First, fibre-optic waveguide structure level containing 7 input pumping light fibres 1, cone district 2, fusion point 3, output pumping optical fiber 4 in pump combiner is placed in the groove of on one piece of aluminum substrate 5, the diameter of groove is 3mm, angle of closely arranging in left groove is the V-type groove 6 of 15 °, middle part angle of closely having arranged in the groove of fusion point is the V-type groove 7 of 20 °, and angle of closely arranging in right groove is the V-type groove 8 of 30 °.
Then with a fixture, output pumping optical fiber 4 level is fixed; by 7 input pumping light fibres 1 at grade dispersed open after be fixed with corresponding fixture again; bare fiber 10 and the polymer protective layer of 7 input pumping light fibres is applied with first high refractive index UV glue 9; until it is covered by UV glue completely; the coated length of bare fiber is about 10mm; the coated length of polymer protective layer is not less than 5mm, carries out hardening with radiation after completing coating with the UV glue of ultraviolet curing lamp to input.
Then with second high refractive index UV glue 11, the polymer exporting pumping optical fiber 4 is applied, right-to-left is answered to apply during coating, close to slowing down coating speed when bare fiber and polymer separation to ensure the starting point of UV glue just in time overlie polymer covering, and don't can be coated on bare fiber.The coated length exporting pumping optical fiber 4 is not less than 8mm, and output pumping optical fiber should be covered by UV glue completely.Hardening with radiation is carried out with the UV glue of ultraviolet curing lamp to output after completing coating.
Finally, as shown in Figure 2, be connected with aluminum substrate by screw 13 with an aluminium matter upper cover 12 identical with aluminum substrate groove structure, with height folding UV glue, the left and right sides groove of aluminium matter upper cover is filled certain distance (being no more than the UV glue coating scope on substrate), and then with ultraviolet curing lamp, this part high folding glue is cured, thus realizes the sealing of pump combiner and complete the encapsulation of pump combiner.
The pump combiner test result utilizing said method to encapsulate is: the 976nm pump light source of pump combiner each arm access power 145W, and total tolerance power reaches 1015W, steady operation more than 1 hour.Wherein, the temperature of input UV glue only rises 24.6 DEG C, and the temperature of output UV glue only rises 23 DEG C.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (5)
1. a high-power fiber pump combiner, is characterized in that: include upper cover, substrate, the input pumping light fibre bundle be welded together and export pumping optical fiber; Described input pumping light fibre bundle and output pumping optical fiber horizontal are placed on substrate; Described substrate two ends and middle part are provided with groove; Described input pumping light fibre bundle is placed on the groove of substrate one end; Described output pumping optical fiber is placed on the groove of the substrate other end; The fusion point of described input pumping light fibre bundle and output pumping optical fiber is arranged on the groove in the middle part of substrate; Described upper cover plate covers on substrate.
2. a kind of high-power fiber pump combiner according to claim 1, it is characterized in that: the plain fiber portion of described input pumping light fibre bundle is dispersed to be opened, there is gap between each exposed optical fiber, and by height folding UV glue, plain fiber portion is fixed on substrate.
3. a kind of high-power fiber pump combiner according to claim 1, is characterized in that: described output pumping optical fiber is rolled over UV glue by the height be coated on optical fiber and is fixed on substrate.
4. a kind of high-power fiber pump combiner according to claim 1, is characterized in that: the shape of described groove is semicircular arc, and inside grooves is closely placed with the semicircular arc V-type groove that angle of taper is less than the maximum stable transmission angle of optical fiber above groove.
5. a kind of high-power fiber pump combiner according to claim 1, is characterized in that: the plain fiber portion of described input pumping light fibre is all arranged in same plane or is scattered in three dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420720753.5U CN204290025U (en) | 2014-11-27 | 2014-11-27 | A kind of high-power fiber pump combiner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420720753.5U CN204290025U (en) | 2014-11-27 | 2014-11-27 | A kind of high-power fiber pump combiner |
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| CN204290025U true CN204290025U (en) | 2015-04-22 |
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| CN201420720753.5U Active CN204290025U (en) | 2014-11-27 | 2014-11-27 | A kind of high-power fiber pump combiner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377537A (en) * | 2014-11-27 | 2015-02-25 | 中国工程物理研究院应用电子学研究所 | High-power optical fiber pumping beam combiner and packaging method thereof |
| CN106469888A (en) * | 2015-08-21 | 2017-03-01 | 中国兵器装备研究院 | A kind of optical fibre device and preparation method thereof |
-
2014
- 2014-11-27 CN CN201420720753.5U patent/CN204290025U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377537A (en) * | 2014-11-27 | 2015-02-25 | 中国工程物理研究院应用电子学研究所 | High-power optical fiber pumping beam combiner and packaging method thereof |
| CN104377537B (en) * | 2014-11-27 | 2018-08-07 | 中国工程物理研究院应用电子学研究所 | A kind of high-power fiber pump combiner and its packaging method |
| CN106469888A (en) * | 2015-08-21 | 2017-03-01 | 中国兵器装备研究院 | A kind of optical fibre device and preparation method thereof |
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