CN1649220A - Optical fiber laser group beam laser - Google Patents
Optical fiber laser group beam laser Download PDFInfo
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- CN1649220A CN1649220A CN 200510023475 CN200510023475A CN1649220A CN 1649220 A CN1649220 A CN 1649220A CN 200510023475 CN200510023475 CN 200510023475 CN 200510023475 A CN200510023475 A CN 200510023475A CN 1649220 A CN1649220 A CN 1649220A
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- optical fiber
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- fiber
- doubly clad
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Abstract
A optical fiber beam laser includes multiple double clad optical fibers, one end of each optical fiber is connected with a pump laser, the other ends of the optical fibers are closely arrayed in a optical fiber clamp in linearity to form a flat optical fiber array output end face and put in an end of a resonator box after removing the clad, a flat convex lens is set at the other end of the box coated with antireflection film on the convex face and the plane face is coated with semi-transparent reflection film toward outside of the box, the distance of the optical fiber array output end face to the semi-transparent reflection film is D, the distance between the fiber cores is d, focal distance of the lens is F forming the following formula: sqd(lambda/2) F and D=F/2.
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 convex surface plating anti-reflection film of this planoconvex spotlight, and plane plating semitransparent reflecting film and outside this resonant cavity box, 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:
With
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 light laser 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 21 removal surrounding layers 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
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 (21) the 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 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), 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 true CN1649220A (en) | 2005-08-03 |
| CN1292519C CN1292519C (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510023475 Expired - Fee Related CN1292519C (en) | 2005-01-20 | 2005-01-20 | Optical fiber laser group beam laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428583C (en) * | 2006-03-22 | 2008-10-22 | 中国科学院上海光学精密机械研究所 | Ring traveling-wave cavity multi-output light beam coherence synthesizing device |
| 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 coherence beam merging apparatus |
| CN102082390A (en) * | 2010-12-20 | 2011-06-01 | 长春理工大学 | Sunlight fiber beam pumping solid laser |
-
2005
- 2005-01-20 CN CN 200510023475 patent/CN1292519C/en not_active Expired - Fee Related
Cited By (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 coherence beam merging apparatus |
| CN100428583C (en) * | 2006-03-22 | 2008-10-22 | 中国科学院上海光学精密机械研究所 | Ring traveling-wave cavity multi-output light beam coherence synthesizing 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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| Publication number | Publication date |
|---|---|
| CN1292519C (en) | 2006-12-27 |
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Granted publication date: 20061227 Termination date: 20110120 |