CN105511098A - Fiber laser integrated collimation optical device - Google Patents
Fiber laser integrated collimation optical device Download PDFInfo
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- CN105511098A CN105511098A CN201610045335.4A CN201610045335A CN105511098A CN 105511098 A CN105511098 A CN 105511098A CN 201610045335 A CN201610045335 A CN 201610045335A CN 105511098 A CN105511098 A CN 105511098A
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- fiber
- fiber laser
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- lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/30—Collimators
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a fiber laser integrated collimation optical device. According to the scheme, the fiber laser integrated collimation optical device comprises a fiber laser, a collimator tail optical fiber and a collimation optical device. Laser emitted by the fiber laser enters the collimation optical device through collimator tail optical fiber coupling and then outputs collimated laser. According to the scheme, the fiber laser integrated collimation optical device has effects of both an optical end cap and a laser collimator, the number of optical elements is reduced, the size of the optical collimator is reduced, and the interference to the fiber laser caused by laser scattering return light is reduced.
Description
Technical field
What the present invention relates to is laser application technology, especially a kind of optical-fiber laser integration collimation optics.
Background technology
There is due to optical-fiber laser the advantages such as conversion efficiency is high, good beam quality, heat management convenience, compact conformation, high power optical fibre laser technology is developed rapidly, basic mode kilowatt level optical fiber laser realizes commercialization to single fiber single-mode output power through striding forward myriawatt magnitude the sixth of the twelve Earthly Branches.For the fiber laser system of reality, the light beam exported from fiber laser generally also will carry out transmitting and applying after colimated light system expands again.At present, existing optical fiber collimator is all separated with fiber-optic output, for high power optical fibre laser, in order to reduce exit loss and protect fiber end face, usually has major diameter quartz end cap in fiber-optic output welding, and at end cap two ends plated film.Although the structure that optical fiber collimator is separated with fiber-optic output is easy to change, shortcoming is complex structure, and volume is comparatively large, has in the application of strict demand at some and can not meet request for utilization volume.
Such as, in multiple beams of optical fiber laser joint synthesis application, require that splicing light beam has higher dutycycle, current optical collimator structure is complicated, and dutycycle is low, directly cannot arrange splicing, needs extra synthesis light path could realize the light beam splicing of high duty ratio.Existing high power optical fibre laser end cap is separated with collimating optical system, optical element and optical interface more, increase the loss of laser, and the back scattering light echo of optical interface can cause interference to fiber laser.
Summary of the invention
Object of the present invention, be exactly for the deficiency existing for prior art, and the technical scheme of a kind of optical-fiber laser integration collimation optics is provided, the program has the effect of optical fiber end cap and laser aligner concurrently, decrease the quantity of optical element, reduce the volume of optical fiber collimator and reduce the interference of laser light scattering light echo to fiber laser.
This programme is achieved by the following technical measures:
A kind of optical-fiber laser integration collimation optics, includes fiber laser, collimating apparatus optical fiber pigtail and collimating optic; The laser that fiber laser sends exports the laser after collimation after being coupled into collimating optic by collimating apparatus optical fiber pigtail.
Preferred as this programme: collimating apparatus optical fiber pigtail is provided with tail optical fiber protective sleeve.
Preferred as this programme: collimating optic is plano-convex optical lens; Two optical surfaces of described plano-convex optical lens, one is plane, and another is convex surface, and plane overlaps with the focal plane of convex surface.
Preferred as this programme: the planar ends of plano-convex optical lens is provided with multi-stage stairs.
Preferred as this programme: the flush weld of collimating apparatus optical fiber pigtail and plano-convex optical lens, the optical axis of collimating apparatus optical fiber pigtail and the optical axis coincidence of plano-convex optical lens.
Preferred as this programme: collimating apparatus optical fiber pigtail adopts the material identical with the fiber laser output optical fibre be collimated and technical parameter.
Preferred as this programme: the material of plano-convex optical lens is identical with the core material of collimating apparatus optical fiber pigtail, the convex surface plating anti-reflection film of plano-convex optical lens.
Preferred as this programme: collimating optic is taper collimation lens; The cone end of taper collimation lens and the welding of collimating apparatus optical fiber pigtail.
Preferred as this programme: the material of taper collimation lens is identical with the core material of collimating apparatus optical fiber pigtail, the non-conical surface plating anti-reflection film of taper collimation lens.
The ultimate principle of this programme is: the fibre core of fiber laser is less, fiber-optic output can be similar to the pointolite thinking a beam direction transmission, planar ends and the fiber-optic output of plano-convex optical lens are welded together, then this pointolite overlaps with the planar ends of plano-convex optical lens, because the planar ends of plano-convex optical lens overlaps with the focal plane of convex surface, then this pointolite also overlaps with the focal plane of convex surface, and the laser therefore through fiber-optic output outgoing is collimated into directional light output after convex surface.
The effect of plano-convex optical lens convex surface collimates optical fiber Output of laser, and its surface configuration can be sphere also can be aspheric surface, and according to optical design result, the beam quality meeting optical-fiber laser collimation requires.The diameter of plano-convex optical lens should be a bit larger tham the diameter of the rear laser beam of collimation, and its focal distance f is determined with the rear laser beam size of collimation by the numerical aperture of optical-fiber laser, and computing formula is as follows:
f=d/NA
Wherein, d is laser beam radius after collimation; NA is the numerical aperture of the optical fiber of plano-convex optical lens planar ends welding.
As can be seen here; the present invention compared with prior art; single device is adopted both to achieve the collimation of optical-fiber laser; there is again the protective effect of traditional end cap to fiber-optic output; structure is simple; adaptive capacity to environment is strong; reduce the volume of colimated light system; improve the dutycycle of fiber optic collimator system, and only have an optical interface in optical-fiber laser alignment procedure, laser loss is little; scatter stray light is few; transfer efficiency is high, has outstanding substantive distinguishing features and progress significantly, and its beneficial effect implemented also is apparent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the specific embodiment of the invention 1.
Fig. 2 is the structural representation of the specific embodiment of the invention 2.
Fig. 3 is the structural representation of the specific embodiment of the invention 3.
In figure, 1 is fiber laser, and 2 is collimating apparatus optical fiber pigtail, and 3 is plano-convex optical lens, and 4 is tail optical fiber protective sleeve, and 5 is special-shaped plano-convex optical lenses, and 6 is taper collimation lenses.
Embodiment
All features disclosed in this instructions, 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 instructions (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.
Embodiment 1
Fig. 1 is optical-fiber laser of the present invention integration collimating optic light channel structure schematic diagram.In figure, collimating apparatus optical fiber pigtail 2 is welded together with the planar ends of plano-convex optical lens 3, fits in the collimating apparatus protective sleeve 4 of metal material after both weldings complete, and is fixed by viscose glue and collimating apparatus protective sleeve 4.The effect of collimating apparatus protective sleeve 4 is that the tail optical fiber 2 of protection collimating apparatus and the fusion point of plano-convex optical lens 3 are not damaged by external force.During use, the output terminal phase welding of collimating apparatus optical fiber pigtail 2 and fiber laser 1.
In Fig. 1, the fiber numerical aperture NA=0.06 that fiber laser 1 adopts, core diameter 20 μm, material is fused quartz, cladding diameter 400 μm, Output of laser wavelength 1064nm, beam quality M
2≈ 1.5, after collimation, laser output beam diameter is about 2mm.Collimating apparatus optical fiber pigtail 2 adopts the optical fiber identical with fiber laser 1.The material of plano-convex optical lens 3 is fused quartz, and convex shape is sphere, radius of curvature R=6.194mm, radius-of-curvature mismachining tolerance △ R/R<0.03%, lens center thickness 19.90mm ± 0.01mm, diameter 4mm, convex surface plating 1064nm laser anti-reflection film.Both controlling when collimating apparatus optical fiber pigtail 2 and 3 welding of plano-convex optical lens, optical axis angle error is less than 10mrad.
Embodiment 2
Fig. 2 is the another kind of optical-fiber laser integration collimating optic light channel structure schematic diagram of the present embodiment.The present embodiment is identical with the basic structure of embodiment 1, and difference is: in embodiment 1, and collimating element is a plano-convex optics thick lens; In the present embodiment, collimating element is still plano-convex lens, but face shaping has larger change.The external diameter of abnormity plano-convex optical lens 5 is divided into three parts; near the section diameter 7.5mm of convex surface; center section diameter is 5mm; its effect is fixing tail optical fiber protective sleeve 4; the section diameter be connected with collimating apparatus optical fiber pigtail 2 is 1.5mm; the selection of its diameter facilitates optical fiber splicer automatic centering, ensures that collimating apparatus optical fiber pigtail 2 and special-shaped plano-convex optical lens 5 are welded together.Ensure in abnormity plano-convex optical lens process that different three parts of external diameter are strictly concentric.
In Fig. 2, special-shaped plano-convex optical lens 5 material is fused quartz, and convex shape is sphere, radius of curvature R=18.000mm, radius-of-curvature mismachining tolerance △ R/R<0.01%, lens center thickness 57.81mm ± 0.02mm, convex surface plating 1064nm laser anti-reflection film.Both controlling when collimating apparatus optical fiber pigtail 2 and 5 welding of plano-convex optical lens, optical axis angle error is less than 5mrad.
Embodiment 3
Fig. 3 is the another kind of optical-fiber laser integration collimating optic light channel structure schematic diagram of the present embodiment.The present embodiment is identical with the basic structure of embodiment 1, and difference is: in embodiment 1, and collimating element is a plano-convex optics thick lens; In the present embodiment, collimating element is still plano-convex lens, but face shaping has larger change.Taper collimation lens 6 external diameter diameter 7.5mm, the planar diameter that taper end is connected with optical fiber pigtail 2 is 1mm, taper full-shape is 20 °, taper collimation lens and fibre optic connecting portion shape select mainly to facilitate optical fiber splicer automatic centering, the yield rate of optical fiber pigtail 2 and taper collimation lens 6 welding.Ensure that plane of incidence is concentric with outgoing curved surface in taper collimation lens process.
In Fig. 3, taper collimation lens 5 material is fused quartz, and convex shape is sphere, radius of curvature R=18.000mm, radius-of-curvature mismachining tolerance △ R/R<0.01%, lens center thickness 57.81mm ± 0.02mm, convex surface plating 1064nm laser anti-reflection film.Both controlling when collimating apparatus optical fiber pigtail 2 and the welding of taper collimation lens, optical axis angle error is less than 5mrad.
The present invention is not limited to aforesaid embodiment.The present invention 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 (9)
1. an optical-fiber laser integration collimation optics, is characterized in that: include fiber laser, collimating apparatus optical fiber pigtail and collimating optic; The laser that described fiber laser sends exports the laser after collimation after being coupled into collimating optic by collimating apparatus optical fiber pigtail.
2. a kind of optical-fiber laser integration collimation optics according to claim 1, is characterized in that: described collimating apparatus optical fiber pigtail is provided with tail optical fiber protective sleeve.
3. a kind of optical-fiber laser integration collimation optics according to claim 1, is characterized in that: described collimating optic is plano-convex optical lens; Two optical surfaces of described plano-convex optical lens, one is plane, and another is convex surface, and plane overlaps with the focal plane of convex surface.
4. a kind of optical-fiber laser integration collimation optics according to claim 3, is characterized in that: the planar ends of described plano-convex optical lens is provided with multi-stage stairs.
5. a kind of optical-fiber laser integration collimation optics according to claim 3 or 4, is characterized in that: the flush weld of described collimating apparatus optical fiber pigtail and plano-convex optical lens, the optical axis of collimating apparatus optical fiber pigtail and the optical axis coincidence of plano-convex optical lens.
6. a kind of optical-fiber laser integration collimation optics according to claim 1, is characterized in that: described collimating apparatus optical fiber pigtail adopts the material identical with the fiber laser output optical fibre be collimated and technical parameter.
7. a kind of optical-fiber laser integration collimation optics according to claim 3, is characterized in that: the material of described plano-convex optical lens is identical with the core material of collimating apparatus optical fiber pigtail, the convex surface plating anti-reflection film of plano-convex optical lens.
8. a kind of optical-fiber laser integration collimation optics according to claim 1, is characterized in that: described collimating optic is taper collimation lens; The cone end of described taper collimation lens and the welding of collimating apparatus optical fiber pigtail.
9. a kind of optical-fiber laser integration collimation optics according to claim 8, is characterized in that: the material of described taper collimation lens is identical with the core material of collimating apparatus optical fiber pigtail, the non-conical surface plating anti-reflection film of taper collimation lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045335.4A CN105511098A (en) | 2016-01-25 | 2016-01-25 | Fiber laser integrated collimation optical device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045335.4A CN105511098A (en) | 2016-01-25 | 2016-01-25 | Fiber laser integrated collimation optical device |
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| CN105511098A true CN105511098A (en) | 2016-04-20 |
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| CN201610045335.4A Pending CN105511098A (en) | 2016-01-25 | 2016-01-25 | Fiber laser integrated collimation optical device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239939A (en) * | 2018-10-16 | 2019-01-18 | 中国人民解放军国防科技大学 | Optical fiber laser array coherent synthesis collimator based on prism |
| CN110967795A (en) * | 2019-12-11 | 2020-04-07 | 瑞尔通(苏州)医疗科技有限公司 | Coupling structure applying end cap lens |
| CN112346178A (en) * | 2020-11-12 | 2021-02-09 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129129A (en) * | 2011-04-08 | 2011-07-20 | 中国科学技术大学 | Integrated optical fiber laser collimator and manufacturing device thereof |
| CN203037892U (en) * | 2012-12-25 | 2013-07-03 | 中国电子科技集团公司第二十三研究所 | High power optical fiber collimator |
| CN103454730A (en) * | 2013-09-26 | 2013-12-18 | 深圳朗光科技有限公司 | Optical fiber collimator |
| CN204287550U (en) * | 2014-12-04 | 2015-04-22 | 中国工程物理研究院应用电子学研究所 | A kind of plug type fiber coupling system connecting DPL laser instrument |
-
2016
- 2016-01-25 CN CN201610045335.4A patent/CN105511098A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129129A (en) * | 2011-04-08 | 2011-07-20 | 中国科学技术大学 | Integrated optical fiber laser collimator and manufacturing device thereof |
| CN203037892U (en) * | 2012-12-25 | 2013-07-03 | 中国电子科技集团公司第二十三研究所 | High power optical fiber collimator |
| CN103454730A (en) * | 2013-09-26 | 2013-12-18 | 深圳朗光科技有限公司 | Optical fiber collimator |
| CN204287550U (en) * | 2014-12-04 | 2015-04-22 | 中国工程物理研究院应用电子学研究所 | A kind of plug type fiber coupling system connecting DPL laser instrument |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239939A (en) * | 2018-10-16 | 2019-01-18 | 中国人民解放军国防科技大学 | Optical fiber laser array coherent synthesis collimator based on prism |
| CN109239939B (en) * | 2018-10-16 | 2021-10-19 | 中国人民解放军国防科技大学 | Optical fiber laser array coherent synthesis collimator based on prism |
| CN110967795A (en) * | 2019-12-11 | 2020-04-07 | 瑞尔通(苏州)医疗科技有限公司 | Coupling structure applying end cap lens |
| CN112346178A (en) * | 2020-11-12 | 2021-02-09 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
| CN112346178B (en) * | 2020-11-12 | 2022-09-02 | 中国人民解放军国防科技大学 | Integrated collimating optical fiber end cap capable of cutting off light beam and collimating optical fiber end cap array |
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Application publication date: 20160420 |