CN1292519C - Optical fiber laser group beam laser - Google Patents
Optical fiber laser group beam laser Download PDFInfo
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- CN1292519C CN1292519C CN 200510023475 CN200510023475A CN1292519C CN 1292519 C CN1292519 C CN 1292519C CN 200510023475 CN200510023475 CN 200510023475 CN 200510023475 A CN200510023475 A CN 200510023475A CN 1292519 C CN1292519 C CN 1292519C
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 35
- 238000005253 cladding Methods 0.000 claims abstract description 6
- 238000007747 plating Methods 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 5
- 230000001427 coherent effect Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 241000931526 Acer campestre Species 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
A fiber laser beam laser comprises a plurality of double-clad fibers, one end of each double-clad fiber is connected with a pump laser, and the other ends of the double-clad fibers are removed of outer cladding and then are arranged in a linear array manner to form a flat plate in a fiber clampThe whole optical fiber array output end face is arranged at one end in a resonant cavity box, a plano-convex lens is arranged at the other end of the resonant cavity box, an antireflection film is plated on the convex surface of the plano-convex lens, a semitransparent reflection film is plated on the plane of the plano-convex lens and faces the outside of the resonant cavity box, the distance from the optical fiber array output end face to the semitransparent reflection film is D, the distance between fiber cores of the optical fiber array output end face is D, the focal length of the plano-convex lens is F, and then D and D satisfy the following relational expression: d2λ F/2 and D ═ F/2. The invention has simple structure, stable and practical system, and is convenient for coherent beam combination of a plurality of optical fiber lasers to generate high-power coherent output.
Description
Technical field
The present invention relates to fiber laser, particularly a kind of optical fiber laser group beam laser.
Background technology
In the various technology for the coherent combination of laser beam, utilizing exocoel to carry out coherent beam combination is a kind of very useful technology.Formerly in the technology, designed exocoel has spatial filter, need two lens and independent half-mirror, referring to technology [IEEE J.QuantumElectron.Vol.27:1582-1593 formerly, 1991], the coupling that the output laser of fiber array can be concerned with of this exocoel, but light path complexity, distance between all optical elements needs strict control, and the stability of whole system is not high, implements difficulty, in addition, because light beam repeatedly passes through the surface of each element when coming and going in resonant cavity, optical energy loss is bigger, is unfavorable for the raising of whole system power.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology formerly, a kind of optical fiber laser group beam laser is provided,, improve stability, compactedness and the power output of this system with simplified structure.
The technology of the present invention solution is:
A kind of optical fiber laser group beam laser, comprise many doubly clad optical fibers, every doubly clad optical fiber one end connects a pump laser, the other end that it is characterized in that described many doubly clad optical fibers is removed surrounding layer, closely be arranged in to linear array and form a smooth fiber array output end face in the fiber clamp, and place an end in the resonant cavity box, the other end of resonant cavity box is provided with a planoconvex spotlight, the anti-reflection film of the convex surface plating laser work wavelength X of this planoconvex spotlight, and the semitransparent reflecting film of plane plating laser work wavelength X is outside this resonant cavity box, form the resonant cavity of described laser between the semitransparent reflecting film of described fiber array output end face and planoconvex spotlight, described fiber array output end face is D to the distance of semitransparent reflecting film, distance between the fibre core of described fiber array output end face is d, the focal length of described planoconvex spotlight is F, and then D and d should satisfy the following relationship formula:
The inner cladding cross-sectional profile of described doubly clad optical fiber is closed shape of double-H groove weld or rectangle, or square.Described pump laser is a semiconductor laser diode.
Laser array by the output of fiber-optic output face, come and go through resonant cavity and just in time to finish one time Fourier transform when a week arriving the fiber-optic output face once more, realized the mutual coupling of each optical-fiber laser, export relevant synthetic laser by planoconvex spotlight plane semitransparent reflecting film at last, thereby realize the beam combination of optical-fiber laser light beam.Light path of the present invention is very simple, and optical element significantly reduces, need not be in addition with independent spatial filter, and can be used for the beam combination of a large amount of fiber laser beams, produce high power laser light.
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is used for the optical fiber laser group beam laser structural representation for the present invention.
Fig. 2 is fiber-optic output face figure among the present invention.Fig. 3 is the planoconvex spotlight profile.
Embodiment
See also Fig. 1 earlier, Fig. 1 is used for the optical fiber laser group beam laser structural representation for the present invention.As seen from the figure, optical fiber laser group beam laser of the present invention, its formation comprises many doubly clad optical fibers 2, one end of every doubly clad optical fiber 2 connects a pump laser 1, after it is characterized in that the other end removal surrounding layer of described many doubly clad optical fibers 2, closely be arranged in to linear array and form a smooth fiber array output end face 22 in the fiber clamp 3 and place ends in the resonant cavity box 5, the other end of resonant cavity box 5 is provided with a planoconvex spotlight 4, the convex surface plating anti-reflection film 41 of this planoconvex spotlight 4, and plane plating semitransparent reflecting film 42 is outside this resonant cavity box 5, form resonant cavity between the semitransparent reflecting film 42 of described fiber array output end face 22 and planoconvex spotlight 4, described fiber array output end face 22 is D to the distance of semitransparent reflecting film 42, distance between the fibre core 24 of described fiber array output end face 22 is d, the focal length of described planoconvex spotlight 4 is F, and then D and d satisfy the following relationship formula:
With
Inner cladding 23 cross-sectional profile of the doubly clad optical fiber 2 described in the present embodiment are the closed shapes of double-H groove weld, and as shown in Figure 2, described pump laser (1) is a semiconductor laser diode.
Its course of work is as follows: send pump light by semiconductor laser 1 and enter doubly clad optical fiber 2, the laser that produces in doped core 24 is through 22 outputs of fiber-optic output face, the array laser of output projects planoconvex spotlight 4, become feedback by semitransparent reflecting film 42 reflections then, behind planoconvex spotlight 4, arrive fiber-optic output face 22 once more and just in time finish Fourier transform one time, realize the relevant coupling of laser in the different fiber, thereby the output of whole system just can obtain relevant output.
Be a specific embodiment below:
With three semiconductor lasers and three doubly clad optical fibers, its length is 25m, constitutes fiber laser.The laser center wavelength that these three fiber lasers produce is 1080nm trickle fluctuation about 10nm, so we are designed to 1080nm with whole system operation optical maser wavelength, fiber clamp is long to be 2cm, so we remove the surrounding layer of three doubly clad optical fiber front end 2cm length, the closed shape of the double-H groove weld of doubly clad optical fiber inner cladding cross section, distance between two parallel lines is 350 μ m, fibre core is in the inner cladding middle, diameter 10 μ m, fix after fiber clamp 3 linear arrays are closely arranged well according to shown in Figure 2 three optical fiber are put into, the distance that adjacent fibre core is 24 is 350 μ m, and the end of three optical fiber polishes and all is in a plane, and this plane is exactly a fiber-optic output face 22.According to formula
We have designed at operation wavelength is the planoconvex spotlight of 1080nm, focal length F=22.685cm, the long D=11.3425cm in chamber, on the convex surface of planoconvex spotlight, plate the anti-reflection film of coupling λ=1080nm then, plating is at the semitransparent reflecting film of λ=1080nm on the plane of planoconvex spotlight, and its transmitance is 40%.Fiber-optic output 22 and planoconvex spotlight are pressed adjusting light path shown in Figure 1, make the distance D=11.3425cm of light output end face 22 to the planoconvex spotlight plane, the central optical axis of middle fibre core 24 of fiber-optic output and planoconvex spotlight point-blank simultaneously.When whole system is worked like this, can output wavelength be the coherent laser of 1080nm just.
In sum, the present invention has constituted a resonant cavity by the output 22 that the parallel tight arrangement of doubly clad optical fiber 2 front ends of having removed surrounding layer is formed with planoconvex spotlight 4, make by the array laser of fiber-optic output 22 outputs and just finished Fourier transform one time, realized relevant coupling through the resonant cavity round trip.Avoided independent usage space filter in the present invention, used optics is few, thereby light path has simply improved the stability of system.
In sum, the present invention has simple in structure, and the coherent beam combination of multifiber laser is convenient in the system stability practicality, the characteristics of the relevant output of high power laser light.
Claims (3)
1. optical fiber laser group beam laser, comprise many doubly clad optical fibers (2), one end of every doubly clad optical fiber (2) connects a pump laser (1), after it is characterized in that the other end removal surrounding layer of described many doubly clad optical fibers (2), closely be arranged in to linear array and form a smooth fiber array output end face (22) in the fiber clamp (3), and place an end in the resonant cavity box (5), the other end of resonant cavity box (5) is provided with a planoconvex spotlight (4), the anti-reflection film (41) of the convex surface plating laser work wavelength X of this planoconvex spotlight (4), and the semitransparent reflecting film (42) of plane plating laser work wavelength X is outside this resonant cavity box (5), form the resonant cavity of described laser between the semitransparent reflecting film (42) of described fiber array output end face (22) and planoconvex spotlight (4), described fiber array output end face (22) is D to the distance of semitransparent reflecting film (42), distance between the fibre core (24) of described fiber array output end face (22) is d, the focal length of described planoconvex spotlight (4) is F, and then D and d satisfy the following relationship formula:
With
2. optical fiber laser group beam laser according to claim 1, inner cladding (23) cross-sectional profile that it is characterized in that described doubly clad optical fiber (2) are closed shape of double-H groove weld or rectangle, or square.
3. optical fiber laser group beam laser according to claim 1 is characterized in that described pump laser (1) is a semiconductor laser diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510023475 CN1292519C (en) | 2005-01-20 | 2005-01-20 | Optical fiber laser group beam laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510023475 CN1292519C (en) | 2005-01-20 | 2005-01-20 | Optical fiber laser group beam laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1649220A CN1649220A (en) | 2005-08-03 |
| CN1292519C true CN1292519C (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510023475 Expired - Fee Related CN1292519C (en) | 2005-01-20 | 2005-01-20 | Optical fiber laser group beam laser |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452568C (en) * | 2006-01-18 | 2009-01-14 | 中国科学院上海光学精密机械研究所 | Laser coherent beam combining device |
| CN100428583C (en) * | 2006-03-22 | 2008-10-22 | 中国科学院上海光学精密机械研究所 | Annular traveling wave cavity multi-output light beam coherent synthesis device |
| CN102082390A (en) * | 2010-12-20 | 2011-06-01 | 长春理工大学 | Sunlight fiber beam pumping solid laser |
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2005
- 2005-01-20 CN CN 200510023475 patent/CN1292519C/en not_active Expired - Fee Related
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| CN1649220A (en) | 2005-08-03 |
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Granted publication date: 20061227 Termination date: 20110120 |