CN201282264Y - Ultra high-power single-mode laser for multi-root multi-mode fibre-optical set beam - Google Patents
Ultra high-power single-mode laser for multi-root multi-mode fibre-optical set beam Download PDFInfo
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- CN201282264Y CN201282264Y CNU2008201084324U CN200820108432U CN201282264Y CN 201282264 Y CN201282264 Y CN 201282264Y CN U2008201084324 U CNU2008201084324 U CN U2008201084324U CN 200820108432 U CN200820108432 U CN 200820108432U CN 201282264 Y CN201282264 Y CN 201282264Y
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Abstract
The utility model discloses a super-high power single-mode laser for a plurality of multimode fiber combinations. The single-mode laser comprises pumping sources (1) and (2), a single-mode active rare earth doped fiber core (4), a raster (51) and a raster (52) used for writing the single mode active rare earth doped fiber core (4), more than two multimode active rare earth doped fiber cores (6), an inner cladding (2) and an outer cladding (3), wherein the inner cladding (2) comprises the single-mode active rare earth doped fiber core (4) and more than two multimode active rare earth doped fiber cores (6), and the center of the single mode active rare earth doped fiber core is located at the center of the inner cladding; and the pumping source is pumped through the end surface or the side surface, or the end surface pumping and the side surface pumping are performed simultaneously. Single-mode laser is produced in the single mode active rare earth doped fiber core; and the associated coupling is adopted between the single-mode active rare earth doped fiber core and each multimode active rare earth doped fiber core, so that each multimode active rare earth doped fiber core outputs magnified single mode laser. Therefore, the super-high power and super-bright output of single mode laser is realized.
Description
Technical field
The utility model relates to a kind of many root multimode fibers beam combination super high power single-mode laser.
Background technology
Fiber laser has been obtained increasingly extensive application with its remarkable performance and cheap price in fields such as optical fiber communication, industrial processes, medical treatment, military affairs.Although realized that in the laboratory single optical fiber output surpasses the single-mode laser of 1kW, and realized that this laser needs strict condition, be difficult to engineering and use; But along with the laser technology application and development, and the development of materials processing, space communication, laser radar, electrooptical countermeasures, laser weapon etc., the laser that needs high power, high-quality, high strength and superbright degree requires the single mode power output to reach MW even GW magnitude.Only adopt the double clad rare earth doped fiber laser of fiber core with single-mold, because the fiber core with single-mold core diameter is less than 10 μ m, be subjected to the restriction of non-linear, structural factor and diffraction limit, the optical power density of bearing is limited, and single mode Active Optical Fiber laser fibre core continuous wave damaging thresholding is about 1W/ μ m
2[J.Nilsson, J.K.Sahu, Y.Jeong, W.A.Clarkson, R.Selvas, A.B.Grudinin, andS.U.Alam, " High Power Fiber Lasers:New Developments ", Proceedings of SPIEVol.4974,50-59 (2003)], its optical damage danger becomes a major challenge that realizes high-power single mode fiber laser.Except optical damage,, even can finally melt fibre core because the heat that high-power light produces also can be damaged optical fiber.Bibliographical information is arranged, the erbium-ytterbium co-doped fiber laser can produce 100W heat [J.Nilsson for every meter, S.U.Alam, J.A.Alvarez-Chavez, P.W.Turner, W.A.Clarkson, andA.B.Grudinin; " High-power and tunable operation of erbium-ytterbium co-dopedcladding-pumped fiber laser ", IEEE J.Quantum Electron.39,987-994 (2003)].
Summary of the invention
The purpose of this utility model is, it is limited and along with the increase of luminous power to overcome the output single-mode laser power of existing traditional double covering single mode fiber laser, its output beam quality variation, the defective of aspects such as heat resistanceheat resistant, the utility model provides a kind of inner cladding that active rare earth fibre core and the active double-clad optical fiber laser of mixing the rare earth fibre core of Duo Gen multimode mixed of single mode arranged, to realize the output of super high power high-quality single-mode laser.
The purpose of this utility model is achieved through the following technical solutions.
A kind of many root multimode fibers beam combination super high power single-mode laser, it comprises pumping source, inner cladding, surrounding layer.Its inner cladding contain single mode active mix the rare earth fibre core with more than the active rare earth fibre core of mixing of two multimode, the active center of circle of mixing the rare earth fibre core of single mode is positioned at the center of circle of inner cladding;
Active rare earth fibre core, the active parallel axes of mixing the axis and the doubly clad optical fiber of rare earth fibre core of multimode of mixing of single mode;
Every multimode is active, and to mix rare earth fibre core doping attribute identical, the active core diameter of mixing the rare earth fibre core of single mode equals 5 microns for a short time, and the active fibre core of single mode two ends write grating or active rare earth fibre core one end of mixing of single mode writes grating, highly reflecting films or the active rare earth fibre core two ends of mixing of single mode that the other end plates corresponding optical maser wavelength write grating, and the other end plates the highly reflecting films of corresponding optical maser wavelength;
This laser adopts end pumping or profile pump or carries out end pumping and profile pump simultaneously.
The active rare earth fibre core of mixing of described single mode is good light sensitive characteristic, and the active rare earth fibre core of mixing of multimode is no photosensitive characteristic or the quick characteristic of the low light level.
The active arbitrary shape that is shaped as of mixing the rare earth fibre core of described multimode: circle, ellipse, D shape, and specification each other is identical or different.
Described single mode is active mixes the rare earth fibre core and the active active medium of mixing the rare earth fibre core of multimode is er-doped, mixes ytterbium, mixes holmium, mixes thulium or erbium and ytterbium codoping.
In the described inner cladding or contain more than the active rare earth fibre core of mixing of three single mode.
Inner cladding contain single mode active mix the rare earth fibre core with more than the active rare earth fibre core of mixing of two multimode,
Mix the rare earth fibre core and more than the active identical length of rare earth fibre core prefabricated rods intercepting of mixing of two multimode, add the low-refraction preform of many equal length single mode is active, deposition stretches and constitutes inner cladding.
Adopt end pumping or profile pump, owing to have only an active rare earth of mixing of single mode with grating, the resonant cavity gain that constitutes is the strongest, be coupled by association, every multimode is active mix rare earth all can resonance on the wavelength that the active fibre core laser cavity with grating produces, need not to add any phase-locked device, realize initiatively phase-locked, by to the many active rare earth beam combinations of mixing of multimode, thereby realize the output of single-mode laser super high power.
In order to realize high efficiency pumping, single mode is active mixes the center of circle of rare earth fibre core, the active centroid of section of mixing the rare earth fibre core of many multimodes of symmetrical distribution overlaps with the center of circle of inner cladding, and single mode is active mixes the rare earth fibre core and the many active rare earth fibre cores of mixing of multimode are full of inner cladding.
The Active Optical Fiber that the utility model adopts is a rare earth doped fiber, and it is rare-earth ion-doped can be erbium ion, ytterbium ion or holmium ion or thulium ion or the erbium ytterbium ion of mixing altogether etc.
The beneficial effects of the utility model are specific as follows:
Described inner cladding has active rare earth fibre core and the active double-clad optical fiber laser of mixing the rare earth fibre core of Duo Gen multimode mixed of single mode, it does not need outside phase modulation apparatus, by inner association coupling, realize many multimodes active mix the rare earth fibre core all resonance active mixing on the wavelength that laser cavity that the rare earth fibre core constitutes produces with the single mode of grating, thereby realize that the single-mode laser super high power amplifies output.Described inner cladding has active rare earth fibre core and the active double-clad optical fiber laser of mixing the rare earth fibre core of Duo Gen multimode mixed of single mode, to mix rare earth fibre core area of dissipation big because many multimodes are active, exportable higher power, again because the many active rare earth fibre cores of mixing of multimode are actually a kind of image intensifer, the active double-clad optical fiber laser of mixing rare earth of comparable independent use single mode is exported high thousands of times power, simultaneously, since every multimode is active mix the rare earth fibre core all resonance active mixing on the wavelength that laser cavity that the rare earth fibre core constitutes produces with the single mode of grating, make the every active rare earth fibre core of mixing of multimode export the single-mode laser that amplifies, realize the output of single-mode laser super high power.This laser can not reduce the quality of output laser, and the many active rare earth fibre cores of mixing are carried out beam combination, has realized the output of single-mode laser superbright degree super high power.
Description of drawings
Fig. 1 single mode is active mixes many root multimode fibers beam combination super high power single-mode laser front view that rare earth fibre core two ends write grating and end pumping.
The A-A profile of Fig. 2 Fig. 1.
Fig. 3 single mode is active mixes many root multimode fibers beam combination super high power single-mode laser front view that rare earth fibre core two ends write grating, profile pump.
Fig. 4 Fig. 3-the B cutaway view.
Fig. 5 single mode is active mixes that rare earth fibre core one end writes grating, the other end plates the highly reflecting films of corresponding optical maser wavelength, many root multimode fibers beam combination super high power single-mode laser front view of profile pump.
Fig. 6 Fig. 5-the C cutaway view.
The active rare earth fibre core two ends of mixing of Fig. 7 single mode write grating, and an end plates the highly reflecting films of corresponding optical maser wavelength, many root multimode fibers beam combination super high power single-mode laser front view of profile pump.
The cutaway view of Fig. 8 Fig. 7 D-D.
The active rare earth fibre core two ends of mixing of Fig. 9 single mode write grating, and an end plates many root multimode fibers beam combination super high power single-mode laser front view of highly reflecting films, end face and the side pumping simultaneously of corresponding optical maser wavelength.
The E-E cutaway view of Figure 10 Fig. 9.
Figure 11 multimode is active mixes many root multimode fibers beam combination super high power single-mode laser front view of the situation that rare earth core shape and quantity do not limit
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Embodiment one
The Active Optical Fiber that adopts among the embodiment 1 is a rare earth doped fiber, and its dopant ion is an erbium ion.
Referring to Fig. 1 and Fig. 2, single mode is active mixes the three root multimode fiber beam combination super high power single-mode lasers that rare earth fibre core two ends write grating and end pumping, is described in detail as follows:
The active core diameter of mixing rare earth fibre core 4 of single mode is 5 μ m, the active 6 liang of two-phases of rare earth fibre core of mixing of adjacent multimode stick together, the active center of circle of mixing rare earth fibre core 4 of single mode is positioned at the center of circle of inner cladding 2, three active rare earth fibre cores of mixing of multimode are symmetrically distributed around the inner cladding center of circle, the active rare earth fibre core 4 of mixing of single mode, three active parallel axes of mixing the axis and the doubly clad optical fiber of rare earth fibre core 6 of multimode, the inner cladding diameter is 125 μ m, surrounding layer 3 thickness are the doubly clad optical fiber of 150 μ m, length is 1m, write grating 51 and 52 respectively at active rare earth fibre core 4 two ends of mixing of single mode, adopt end pumping with 1 pair of doubly clad optical fiber of pumping source, laser is exported from active the mixing the rare earth fibre core of multimode.
Embodiment two
The Active Optical Fiber that adopts among the embodiment 2 is a rare earth doped fiber, and its dopant ion is a ytterbium ion.
Referring to Fig. 3,4, single mode is active mixes many root multimode fibers beam combination super high power single-mode laser that the rare earth two ends write grating, profile pump.Be described in detail as follows:
Active rare earth fibre core (4) core diameter of mixing of single mode is 3 μ m, the active 6 liang of two-phases of rare earth fibre core of mixing of adjacent multimode stick together, the active center of circle of mixing rare earth fibre core 4 of single mode is positioned at the center of circle of inner cladding 2, four active rare earth fibre cores of mixing of multimode are symmetrically distributed around the inner cladding center of circle, the active rare earth fibre core 4 of mixing of single mode, the many active axis of rare earth fibre core 6 and the parallel axes of double clad of mixing of multimode, the inner cladding diameter is 200 μ m, surrounding layer 3 thickness are the doubly clad optical fiber of 150 μ m, length is 50cm, write grating 51 and 52 respectively at the active two ends of mixing rare earth fibre core 4 of single mode, adopt profile pump with 1 pair of doubly clad optical fiber of pumping source, laser is exported from active the mixing the rare earth fibre core 6 of multimode.
Embodiment three
The Active Optical Fiber that adopts among the embodiment 3 is a rare earth doped fiber, and its dopant ion is a holmium ion.
Referring to Fig. 5,6, single mode is active mixes that rare earth one end writes grating, the other end plates the highly reflecting films of corresponding optical maser wavelength, many root multimode fibers beam combination super high power single-mode laser of profile pump.Be described in detail as follows:
Active rare earth fibre core 4 core diameters of mixing of single mode are 3 μ m, the active 6 liang of two-phases of rare earth fibre core of mixing of adjacent multimode stick together, single mode is active mixes the center of circle that rare earth fibre core 4 centers of circle are positioned at inner cladding 2, five active rare earth fibre cores of mixing of multimode are symmetrically distributed around the inner cladding center of circle, the active rare earth fibre core 4 of mixing of single mode, five active parallel axes of mixing the axis and the doubly clad optical fiber of rare earth fibre core 6 of multimode, the inner cladding diameter is 200 μ m, surrounding layer 3 thickness are the doubly clad optical fiber of 150 μ m, length is 30cm, the active end of mixing the rare earth fibre core of single mode writes grating 52 in the doubly clad optical fiber, the other end plates the highly reflecting films 7 of corresponding optical maser wavelength, adopt profile pump with 1 pair of doubly clad optical fiber of pumping source, laser is exported from active the mixing the rare earth fibre core 6 of multimode.
Embodiment four
The Active Optical Fiber that adopts among the embodiment 4 is a rare earth doped fiber, and its dopant ion is a holmium ion.
Referring to Fig. 7,8, the active rare earth two ends of mixing of single mode write grating, and an end plates the highly reflecting films of corresponding optical maser wavelength, many root multimode fibers beam combination super high power single-mode laser of profile pump.Be described in detail as follows:
Active rare earth fibre core 4 core diameters of mixing of single mode are 2 μ m, the active 6 liang of two-phases of rare earth fibre core of mixing of adjacent multimode stick together, single mode is active mixes the center of circle that rare earth fibre core 4 centers of circle are positioned at inner cladding 2, the active rare earth fibre core 4 of mixing of single mode, the active parallel axes of mixing the axis and the doubly clad optical fiber of rare earth fibre core 6 of six roots of sensation multimode, the inner cladding diameter is 600 μ m, surrounding layer 3 thickness are the doubly clad optical fiber of 150 μ m, length is 10cm, active rare earth fibre core 4 two ends of mixing of active single mode write grating 51 and 52 respectively, the other end plates the highly reflecting films 7 of corresponding optical maser wavelength, adopt profile pump with 1 pair of doubly clad optical fiber of pumping source, laser is exported from active the mixing the rare earth fibre core 6 of multimode.
Embodiment five
The doped fiber that adopts among the embodiment 5 is an active doping optical fibre, and its active medium is an erbium and ytterbium codoping.
Referring to Fig. 9,10, the active rare earth two ends of mixing of single mode write grating, and an end plates many root multimode fibers beam combination super high power single-mode laser of highly reflecting films, end face and the side pumping simultaneously of corresponding optical maser wavelength.Implementation step is as follows:
Active rare earth fibre core 4 core diameters of mixing of single mode are 1 μ m, the active 6 liang of two-phases of rare earth fibre core of mixing of adjacent multimode stick together, single mode is active mixes the center of circle that rare earth fibre core 4 centers of circle are positioned at inner cladding 2, the active rare earth fibre core 4 of mixing of single mode, the active parallel axes of mixing the axis and the doubly clad optical fiber of rare earth fibre core 6 of six multimodes, inner cladding diameter 2r is 125 μ m～600 μ m, surrounding layer 3 thickness are the doubly clad optical fiber of 150 μ m, length L is 0.1～1m, active rare earth fibre core 4 two ends of mixing of single mode write grating 51 and 52, the other end plates the highly reflecting films 7 of corresponding optical maser wavelength, adopt end pumping and profile pump with 12 pairs of doubly clad optical fibers of pumping source 1 and pumping source respectively, laser is exported from active the mixing the rare earth fibre core 6 of multimode.
Embodiment six
The doped fiber that adopts among the embodiment 6 is an active doping optical fibre, and its active medium is an erbium and ytterbium codoping.
Many root multimode fibers beam combination super high power single-mode laser that multimode is active mixes the situation that rare earth core shape and quantity do not limit is referring to Figure 11, and implementation step is as follows:
The active core diameter of mixing rare earth fibre core 4 of single mode equals 5 μ m, the many active rare earth fibre cores of mixing of multimode are arbitrary shape, and specification is inequality, comprise two oval fibre cores 61 and 62 as many active rare earth fibre cores 6 of mixing of multimode here, three active rare earth fibre cores 62 of mixing of multimode, 64,65 and active rare earth fibre cores 63 of mixing of single mode, single mode is active mixes the center of circle that rare earth fibre core 4 centers of circle are positioned at inner cladding 2, active rare earth fibre core 4 axis of mixing of single mode, the active rare earth fibre core 4 of mixing of single mode, the active rare earth fibre core 61 of mixing of multimode, 62,63,64,65 the axis and the parallel axes of doubly clad optical fiber, the inner cladding diameter is 125 μ m～600 μ m, surrounding layer 3 thickness are the doubly clad optical fiber of 150 μ m, length is 0.1～1m, active rare earth fibre core 4 two ends of mixing of single mode write grating 51 and 52, the other end plates the highly reflecting films 7 of corresponding optical maser wavelength, adopts end pumping and profile pump with 12 pairs of doubly clad optical fibers of pumping source 1 and pumping source respectively, and laser is exported from active the mixing the rare earth fibre core of multimode.
Claims (3)
1. the super high power of root multimode fiber beam combination more than kind single-mode laser, it comprises pumping source, inner cladding, surrounding layer; It is characterized in that: inner cladding contain single mode active mix rare earth fibre core (4) with more than the active rare earth fibre core (6) of mixing of two multimode, the active center of circle of mixing rare earth fibre core (4) of single mode is positioned at the center of circle of inner cladding (2);
Active rare earth fibre core (4), the active axis of rare earth fibre core (6) and the parallel axes of doubly clad optical fiber of mixing of multimode of mixing of single mode;
Every multimode is active, and to mix rare earth fibre core doping attribute identical, the active core diameter of mixing rare earth fibre core (4) of single mode equals 5 microns for a short time, and the active fibre core of single mode (4) two ends write grating (51) and (52), or active rare earth fibre core (4) one ends of mixing of single mode write grating (52), highly reflecting films (7) or the active rare earth fibre core two ends of mixing of single mode that the other end plates corresponding optical maser wavelength write grating (51) and (52), and the other end plates the highly reflecting films (7) of corresponding optical maser wavelength;
This laser adopts end pumping or profile pump or carries out end pumping and profile pump simultaneously.
2. a kind of many root multimode fibers beam combination super high power single-mode laser according to claim 1 is characterized in that: the active rare earth fibre core (4) of mixing of single mode is good light sensitive characteristic, and the active rare earth fibre core (6) of mixing of multimode is no photosensitive characteristic or the quick characteristic of the low light level.
3. a kind of many root multimode fibers beam combination super high power single-mode laser according to claim 1 is characterized in that: the active circle that is shaped as of mixing rare earth fibre core (6) of multimode, and ellipse, and specification each other is identical or different.
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| CNU2008201084324U CN201282264Y (en) | 2008-05-30 | 2008-05-30 | Ultra high-power single-mode laser for multi-root multi-mode fibre-optical set beam |
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| CNU2008201084324U CN201282264Y (en) | 2008-05-30 | 2008-05-30 | Ultra high-power single-mode laser for multi-root multi-mode fibre-optical set beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364767A (en) * | 2011-11-07 | 2012-02-29 | 北京交通大学 | Linear-cavity single-frequency fiber bragg grating (FBG) fiber laser |
| CN105098578A (en) * | 2015-06-19 | 2015-11-25 | 深圳联品激光技术有限公司 | Optical fiber resonant cavity, fabrication method thereof and optical fiber laser |
-
2008
- 2008-05-30 CN CNU2008201084324U patent/CN201282264Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364767A (en) * | 2011-11-07 | 2012-02-29 | 北京交通大学 | Linear-cavity single-frequency fiber bragg grating (FBG) fiber laser |
| CN105098578A (en) * | 2015-06-19 | 2015-11-25 | 深圳联品激光技术有限公司 | Optical fiber resonant cavity, fabrication method thereof and optical fiber laser |
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Granted publication date: 20090729 Termination date: 20120530 |