CN101202417A - High-transmittance beam combination optical fiber laser - Google Patents
High-transmittance beam combination optical fiber laser Download PDFInfo
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- CN101202417A CN101202417A CNA2007101884673A CN200710188467A CN101202417A CN 101202417 A CN101202417 A CN 101202417A CN A2007101884673 A CNA2007101884673 A CN A2007101884673A CN 200710188467 A CN200710188467 A CN 200710188467A CN 101202417 A CN101202417 A CN 101202417A
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- Prior art keywords
- laser
- optical fibre
- fiber laser
- lens
- coupling mirror
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 26
- 238000002834 transmittance Methods 0.000 title description 2
- 239000000835 fiber Substances 0.000 claims abstract description 26
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 238000002310 reflectometry Methods 0.000 claims description 6
- 238000009738 saturating Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000001427 coherent effect Effects 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to a high-transmission beam combination optical fiber laser for realizing high-power output by using a multipath beam combination technology. The fiber laser comprises a fiber laser, prisms, lenses, a coupling mirror and a collimation beam-shrinking system, wherein the fiber laser is symmetrically arranged at two sides of the prisms, the reflecting surfaces of the prisms are arranged on the incident light path of the fiber laser, and the lenses are arranged on the reflecting light path of the prisms; the coupling mirror is arranged on the emergent light path of the lens, the incident surface of the coupling mirror is superposed with the focal plane of the lens, and the collimating and beam-contracting system is arranged on the emergent light path of the coupling mirror. The invention provides a high-transmission beam-combining fiber laser which can realize beam combination of a plurality of pairs of fiber lasers, enables the beam combination of the plurality of pairs of fiber lasers to become a beam of light with the peak value positioned on a central transmission shaft and is output by combining the beam into high-power laser.
Description
Technical field
The present invention relates to beam laser, especially a kind of high penetrate group beam optical fibre laser that uses the multiplex beam combination technology to realize high power output.
Background technology
That fiber laser has is simple in structure, thermal diffusivity good, conversion efficiency is high, stable performance, beam quality advantages of higher, and high-capacity optical fiber laser can be widely used in fields such as industrial processes, national defence, space communication.Though the power output of simple optical fiber laser has now realized more than 2,000 watt level, also far can not satisfy the specific (special) requirements in some field.Because high power laser light is to the restriction of the hot light injury problem of optical fiber, the beam combination technology of development multichannel light beam is to realize more high-output power, particularly the only way of myriawatt level fiber laser.
Prior art is [referring to technology Appl.Phys.Lett.22 (2004) 4837-4839 formerly; Opt.Expr.14 (2004) 2721-2726] realized the relevant locking of two-way fiber laser.But there is following shortcoming in this technology:
Though 1, prior art has realized the phase locking of two-way light beam, can only be used to observe coherent phenomena (coherent fringe), can not be that peak value is positioned at a branch of light on the central transmission axle with the two-way laser beam combination.
Though 2, prior art has realized the phase locking of two pairs of fiber lasers, can not realize many phase lockings to fiber laser, more can not become peak value to optical fiber laser group beam and be positioned at a branch of light on the central transmission axle many.
Summary of the invention
The present invention is for solving the above-mentioned technical problem that exists in the background technology, and provide a kind of beam combination of realizing many to optical-fiber laser, making manyly becomes peak value to optical fiber laser group beam and is positioned at a branch of light on the central transmission axle, and beam combination becomes the high penetrate group beam optical fibre laser of high power laser output.
Technical solution of the present invention is: the present invention is a kind of high penetrate group beam optical fibre laser, its special character is: this high penetrate group beam optical fibre laser comprises fiber laser, prism, lens, coupling mirror, fiber laser is symmetricly set on the prism both sides, the reflecting surface of prism is arranged on the input path of fiber laser, and lens are arranged on the reflected light path of prism; The emitting light path of lens is provided with coupling mirror, and the plane of incidence of coupling mirror overlaps with the focal plane of lens.
Above-mentioned fiber laser is two or more.
Above-mentioned prism is right-angle prism, right angle polyhedral prism or diameter circle cone prism.
The distance of said lens and fiber laser exit facet is the focal length of lens.
All be coated with on the reflecting surface of above-mentioned prism the high anti-film of laser.
The plane of incidence of above-mentioned coupling mirror is coated with the film that laser is had certain reflectivity.
The reflectivity of above-mentioned film is 5%-15%.
The exit facet of above-mentioned coupling mirror is coated with the high saturating film of laser.
Said lens is a fourier transform lens.
Above-mentioned coupling mirror is average output coupling mirror.
The present invention utilizes fourier transform technique (being called again sometimes in the prior art: from imaging chamber technology) to realize each coherent beam combination to optical-fiber laser; Accurately control each spatial distribution to light beam, make each to laser about the central transmission axial symmetry, thereby realize each coherent beam combination to optical-fiber laser, their transmission backs form peak value and are positioned at a branch of light on the central transmission axle in the far field, and therefore different central transmission axle coincidences to laser realize different incoherent beam combinations to laser naturally.The present invention is simple in structure, and favorable expandability is easy to realize powerful laser output.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Referring to Fig. 1, this figure is the structural representation of the fiber laser in the structure of the present invention when being two, and a1, b1 are two same kind fiber lasers, and a and b are respectively their laser emitting surface, the laser A1 and the B1 of a pair of relative transmission that they send.1 is right-angle prism, and fiber laser a1 and b1 place with respect to right-angle prism 1 symmetry.Two reflectings surface 11 of right-angle prism 1 and 12 all are coated with laser λ reflectivity greater than 99% high-reflecting film, and laser A1 and B1 become the laser A2 and the B2 of pair of parallel transmission after prism 1 reflection.2 for focal length is the fourier transform lens of f=250mm, and fourier transform lens 2 is f apart from the distance of laser emitting surface a and b.Laser A2 and B2 are a pair of convergent laser A3 and B3 after lens 2 poly-penetrating.3 is average output coupling mirror, and 31 faces of average output coupling mirror 3 are coated with has certain reflectivity (such as 5%, 10% to laser, 15% etc., this embodiment is 10%) film, 32 faces are coated with laser λ transmissivity greater than 99% high transmittance film, 31 focal planes with lens 2 overlap.Laser A3 and B3 realize the mutual injection of fiber laser a1 and b1 after average output coupling mirror 3 partial reflections, thereby realize the phase locking of two-way light beam.Laser A3 and B3 are respectively A4 and B4 through the transmitted light of average output coupling mirror 3, collimate the beam system 4 that contracts and are used for laser A4 and B4 collimation are collimated light beam A5 and B5, dwindle the distance between them simultaneously.Collimate the beam system 4 that contracts and be made of three lens, the focal distance f of three lens is respectively f1=100mm among this embodiment, f2=250mm, f3=25mm, after space transmission, converge with regard to produce power like this, become peak value and be positioned at a branch of smooth C on the transmission axle center O O ' at far-field laser A5 and B5.
Claims (10)
1. high penetrate group beam optical fibre laser, it is characterized in that: this high penetrate group beam optical fibre laser comprises fiber laser, prism, lens, coupling mirror, described fiber laser is symmetricly set on the prism both sides, the reflecting surface of described prism is arranged on the input path of fiber laser, and described lens are arranged on the reflected light path of prism; The emitting light path of described lens is provided with coupling mirror, and the plane of incidence of described coupling mirror overlaps with the focal plane of lens.
2. high penetrate group beam optical fibre laser according to claim 1 is characterized in that: described fiber laser is two or more.
3. high penetrate group beam optical fibre laser according to claim 1 and 2 is characterized in that: described prism is right-angle prism, right angle polyhedral prism or diameter circle cone prism.
4. high penetrate group beam optical fibre laser according to claim 3 is characterized in that: the distance of described lens and fiber laser exit facet is the focal length of lens.
5. high penetrate group beam optical fibre laser according to claim 4 is characterized in that: all be coated with on the reflecting surface of described prism the high anti-film of laser.
6. high penetrate group beam optical fibre laser according to claim 5 is characterized in that: the plane of incidence of described coupling mirror is coated with the film that laser is had certain reflectivity.
7. high penetrate group beam optical fibre laser according to claim 6 is characterized in that: the reflectivity of described film is 5%-15%.
8. high penetrate group beam optical fibre laser according to claim 6 is characterized in that: the exit facet of described coupling mirror is coated with the high saturating film of laser.
9. high penetrate group beam optical fibre laser according to claim 1 is characterized in that: described lens are fourier transform lens.
10. high penetrate group beam optical fibre laser according to claim 1 is characterized in that: described coupling mirror is average output coupling mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101884673A CN101202417A (en) | 2007-12-03 | 2007-12-03 | High-transmittance beam combination optical fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101884673A CN101202417A (en) | 2007-12-03 | 2007-12-03 | High-transmittance beam combination optical fiber laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101202417A true CN101202417A (en) | 2008-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101884673A Pending CN101202417A (en) | 2007-12-03 | 2007-12-03 | High-transmittance beam combination optical fiber laser |
Country Status (1)
| Country | Link |
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| CN (1) | CN101202417A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192178A (en) * | 2012-01-04 | 2013-07-10 | 夏致俊 | Combined-type laser cutting machine |
| CN106291950A (en) * | 2011-12-16 | 2017-01-04 | 应用材料公司 | Beam multiplex combiner for laser processing apparatus |
-
2007
- 2007-12-03 CN CNA2007101884673A patent/CN101202417A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291950A (en) * | 2011-12-16 | 2017-01-04 | 应用材料公司 | Beam multiplex combiner for laser processing apparatus |
| TWI642507B (en) * | 2011-12-16 | 2018-12-01 | 應用材料股份有限公司 | Radiation source and multiple beam combiner for laser processing apparatus |
| CN103192178A (en) * | 2012-01-04 | 2013-07-10 | 夏致俊 | Combined-type laser cutting machine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080618 |